* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        :root {
            --bg-color: #f5f8fc;
            --text-color: #15233c;
            --muted-text: #5d6d87;
            --card-bg: #ffffff;
            --surface-bg: #eef3f9;
            --surface-hover: #e4ecf6;
            --border-color: #d7e0ec;
            --header-gradient: linear-gradient(135deg, #0d2d63 0%, #1c4f9b 62%, #c89b19 100%);
            --accent: #c89b19;
            --accent-hover: #af8614;
            --section-accent: #1c4f9b;
            --footer-bg: #0b1d3c;
            --footer-link: #d8e3f2;
            --modal-overlay: rgba(8, 18, 40, 0.78);
            --quiz-overlay: rgba(8, 18, 40, 0.9);
            --shadow-soft: 0 10px 28px rgba(13, 45, 99, 0.10);
            --shadow-strong: 0 18px 38px rgba(13, 45, 99, 0.16);
            --input-bg: #ffffff;
            --header-offset: 108px;
        }

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background: var(--bg-color);
            padding-top: var(--header-offset);
            scroll-behavior: smooth;
            transition: background 0.3s ease, color 0.3s ease;
        }

        body.entry-locked {
            overflow: hidden;
        }

        body.app-booting {
            overflow: hidden;
            cursor: progress;
        }

        body.app-booting > *:not(script) {
            pointer-events: none;
        }

        body.app-booting #entryPortal {
            pointer-events: auto;
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 3px solid rgba(28, 79, 155, 0.32);
            outline-offset: 3px;
        }

        .entry-portal {
            position: fixed;
            inset: 0;
            z-index: 1800;
            display: flex;
            align-items: flex-start;
            justify-content: center;
            overflow-y: auto;
            padding: clamp(1rem, 3vw, 2.5rem);
            background:
                radial-gradient(circle at top left, rgba(200, 155, 25, 0.16), transparent 28%),
                radial-gradient(circle at bottom right, rgba(59, 130, 246, 0.18), transparent 32%),
                linear-gradient(145deg, rgba(8, 20, 48, 0.95), rgba(13, 45, 99, 0.93));
            backdrop-filter: blur(16px);
        }

        .entry-portal[hidden] {
            display: none !important;
        }

        .entry-portal-shell {
            width: min(1180px, 100%);
            display: grid;
            grid-template-columns: minmax(0, 1.12fr) minmax(360px, 0.88fr);
            gap: 1.35rem;
            min-height: min(860px, calc(100vh - 2rem));
            margin: auto 0;
            padding: 1.2rem;
            border-radius: 36px;
            border: 1px solid rgba(255,255,255,0.14);
            background: rgba(255,255,255,0.08);
            box-shadow: 0 32px 90px rgba(15, 23, 42, 0.36);
            animation: fadeInUp 0.45s ease;
        }

        .entry-portal-hero,
        .entry-portal-card {
            min-width: 0;
            border-radius: 28px;
            padding: 1.6rem;
        }

        .entry-portal-hero {
            background:
                radial-gradient(circle at top right, rgba(255, 255, 255, 0.12), transparent 30%),
                radial-gradient(circle at bottom left, rgba(200, 155, 25, 0.18), transparent 32%),
                linear-gradient(155deg, #0b1d3c, #1c4f9b 58%, #10254d);
            border: 1px solid rgba(255,255,255,0.08);
            color: white;
            box-shadow: inset 0 1px 0 rgba(255,255,255,0.08);
        }

        .entry-portal-badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.4rem 0.9rem;
            border-radius: 999px;
            background: rgba(255,255,255,0.14);
            color: white;
            font-size: 0.78rem;
            font-weight: 800;
            letter-spacing: 0.08em;
            text-transform: uppercase;
        }

        .entry-portal-hero h1 {
            margin: 1rem 0 0.7rem;
            font-size: clamp(2.2rem, 4vw, 3.4rem);
            line-height: 1.05;
            color: white;
        }

        .entry-portal-lead {
            color: rgba(255,255,255,0.82);
            font-size: 1rem;
            line-height: 1.7;
            max-width: 54ch;
        }

        .entry-portal-stat-grid {
            display: grid;
            grid-template-columns: repeat(4, minmax(0, 1fr));
            gap: 0.85rem;
            margin-top: 1.45rem;
        }

        .entry-portal-stat {
            padding: 1rem;
            border-radius: 18px;
            border: 1px solid rgba(255,255,255,0.12);
            background: rgba(255,255,255,0.1);
            box-shadow: 0 12px 24px rgba(15, 23, 42, 0.12);
            backdrop-filter: blur(10px);
        }

        .entry-portal-stat strong {
            display: block;
            font-size: 1.4rem;
            color: white;
        }

        .entry-portal-stat span {
            color: rgba(226, 232, 240, 0.82);
            font-size: 0.85rem;
            font-weight: 700;
            letter-spacing: 0.04em;
            text-transform: uppercase;
        }

        .entry-portal-feature-list {
            display: grid;
            gap: 0.85rem;
            margin-top: 1.45rem;
        }

        .entry-portal-feature {
            padding: 1rem 1.05rem;
            border-radius: 18px;
            background: rgba(255,255,255,0.1);
            border: 1px solid rgba(255,255,255,0.1);
            color: rgba(226, 232, 240, 0.86);
            line-height: 1.6;
        }

        .entry-portal-feature strong {
            display: block;
            margin-bottom: 0.25rem;
            color: white;
        }

        .entry-portal-feature span {
            display: block;
        }

        .entry-portal-card {
            background:
                radial-gradient(circle at top left, rgba(200, 155, 25, 0.12), transparent 34%),
                linear-gradient(180deg, rgba(255,255,255,0.98), rgba(244,247,252,0.96));
            border: 1px solid rgba(255,255,255,0.22);
            box-shadow: 0 18px 40px rgba(15, 23, 42, 0.16);
        }

        .entry-option-grid {
            display: grid;
            gap: 1rem;
        }

        .entry-option-card {
            display: flex;
            flex-direction: column;
            gap: 0.85rem;
            padding: 1.2rem;
            border-radius: 24px;
            border: 1px solid rgba(148, 163, 184, 0.18);
            background: linear-gradient(180deg, #ffffff, #f8fafc);
            box-shadow: 0 16px 28px rgba(15, 23, 42, 0.08);
            transition: transform 0.28s ease, box-shadow 0.28s ease, border-color 0.28s ease;
        }

        .entry-option-card:hover {
            transform: translateY(-3px);
            border-color: rgba(28, 79, 155, 0.22);
            box-shadow: 0 20px 36px rgba(15, 23, 42, 0.12);
        }

        .entry-option-card-primary {
            border-color: rgba(28, 79, 155, 0.24);
            background:
                radial-gradient(circle at top right, rgba(200, 155, 25, 0.14), transparent 40%),
                linear-gradient(180deg, #eef4ff, #ffffff);
        }

        .entry-option-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
        }

        .entry-option-kicker {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.35rem 0.8rem;
            border-radius: 999px;
            background: rgba(15, 23, 42, 0.08);
            color: #475569;
            font-size: 0.74rem;
            font-weight: 800;
            letter-spacing: 0.06em;
            text-transform: uppercase;
        }

        .entry-option-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 16px;
            background: rgba(255,255,255,0.92);
            color: #0f172a;
            font-size: 1.2rem;
            box-shadow: 0 10px 22px rgba(15, 23, 42, 0.12);
        }

        .entry-option-card h3 {
            margin: 0;
            color: #0f172a;
            font-size: 1.22rem;
        }

        .entry-option-card p {
            color: #475569;
            line-height: 1.6;
            min-width: 0;
            overflow-wrap: anywhere;
        }

        .entry-portal-action {
            width: 100%;
            margin-top: auto;
            min-height: 54px;
        }

        .entry-option-card .btn-secondary {
            color: var(--text-color);
            border-color: var(--border-color);
        }

        .entry-option-card .btn-secondary:hover {
            background: var(--surface-hover);
            color: var(--text-color);
        }

        /* Header */
        header {
            background: var(--header-gradient);
            color: white;
            padding: 1rem 0;
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }

        nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
        }

        .logo {
            font-size: 1.8rem;
            font-weight: bold;
        }

        .nav-menu-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 0.3rem;
            width: 48px;
            height: 48px;
            padding: 0.7rem;
            border: 1px solid rgba(255,255,255,0.2);
            border-radius: 16px;
            background: rgba(255,255,255,0.1);
            cursor: pointer;
            transition: transform 0.25s ease, background 0.25s ease, border-color 0.25s ease;
        }

        .nav-menu-toggle span {
            display: block;
            width: 100%;
            height: 2px;
            border-radius: 999px;
            background: white;
            transition: transform 0.25s ease, opacity 0.25s ease;
        }

        .nav-menu-toggle:hover {
            transform: translateY(-1px);
            background: rgba(255,255,255,0.16);
            border-color: rgba(255,255,255,0.36);
        }

        .nav-menu-toggle.is-active span:nth-child(1) {
            transform: translateY(6px) rotate(45deg);
        }

        .nav-menu-toggle.is-active span:nth-child(2) {
            opacity: 0;
        }

        .nav-menu-toggle.is-active span:nth-child(3) {
            transform: translateY(-6px) rotate(-45deg);
        }

        .nav-links {
            display: flex;
            list-style: none;
            gap: 0.7rem;
            padding: 0.35rem;
            border-radius: 999px;
            background: rgba(255,255,255,0.08);
            border: 1px solid rgba(255,255,255,0.12);
            transform: scale(0.96);
            transform-origin: center;
            box-shadow: 0 0 0 rgba(0,0,0,0);
            transition: transform 0.25s ease, background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
        }

        .nav-links:hover,
        .nav-links:focus-within {
            transform: scale(1.02) translateY(-1px);
            background: rgba(255,255,255,0.14);
            border-color: rgba(255,255,255,0.28);
            box-shadow: 0 12px 24px rgba(15, 23, 42, 0.2);
        }

        .nav-links a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: white;
            text-decoration: none;
            padding: 0.55rem 0.95rem;
            border-radius: 999px;
            font-size: 0.92rem;
            font-weight: 600;
            letter-spacing: 0.01em;
            white-space: nowrap;
            transition: background 0.25s ease, opacity 0.25s ease;
        }

        .nav-links a:hover,
        .nav-links a:focus-visible {
            opacity: 1;
            background: rgba(255,255,255,0.16);
            outline: none;
        }

        .nav-links a:active {
            background: rgba(255,255,255,0.26);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 0.8rem;
        }

        .nav-mobile-panel {
            display: none;
        }

        .nav-mobile-panel[hidden] {
            display: none !important;
        }

        .nav-mobile-shell {
            display: grid;
            gap: 0.7rem;
            padding: 1rem;
        }

        .nav-mobile-shell a {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0.95rem 1rem;
            border-radius: 18px;
            background: rgba(255,255,255,0.08);
            color: white;
            text-decoration: none;
            font-weight: 700;
        }

        .nav-mobile-shell a:hover,
        .nav-mobile-shell a:focus-visible {
            background: rgba(255,255,255,0.16);
            outline: none;
        }

        .theme-toggle {
            background: rgba(255,255,255,0.1);
            color: white;
            padding: 0.35rem;
            border: 1px solid rgba(255,255,255,0.25);
            border-radius: 999px;
            cursor: pointer;
            font-weight: bold;
            transition: transform 0.3s, background 0.3s, border-color 0.3s, box-shadow 0.3s;
        }

        .theme-toggle:hover {
            transform: translateY(-2px);
            background: rgba(255,255,255,0.2);
            border-color: rgba(255,255,255,0.45);
            box-shadow: 0 12px 24px rgba(0,0,0,0.18);
        }

        .theme-switch-track {
            position: relative;
            display: inline-flex;
            align-items: center;
            justify-content: space-between;
            gap: 1.55rem;
            width: 78px;
            padding: 0.4rem 0.55rem;
            border-radius: 999px;
        }

        .theme-switch-icon {
            position: relative;
            z-index: 2;
            font-size: 0.95rem;
            line-height: 1;
            transition: color 0.3s ease, opacity 0.3s ease;
        }

        .theme-switch-icon-sun {
            color: #fef08a;
        }

        .theme-switch-icon-moon {
            color: rgba(255,255,255,0.82);
        }

        .theme-switch-thumb {
            position: absolute;
            top: 50%;
            left: 6px;
            width: 30px;
            height: 30px;
            border-radius: 50%;
            background: linear-gradient(135deg, #ffffff, #dbeafe);
            box-shadow: 0 10px 18px rgba(15,23,42,0.25);
            transform: translateY(-50%);
            transition: transform 0.32s ease, background 0.32s ease;
        }

        .theme-toggle.is-dark .theme-switch-thumb {
            transform: translate(36px, -50%);
            background: linear-gradient(135deg, #0f172a, #334155);
        }

        .theme-toggle.is-dark .theme-switch-icon-sun {
            color: rgba(255,255,255,0.5);
            opacity: 0.5;
        }

        .theme-toggle.is-dark .theme-switch-icon-moon {
            color: #e2e8f0;
            opacity: 1;
        }

        .theme-toggle:not(.is-dark) .theme-switch-icon-moon {
            opacity: 0.55;
        }

        .admin-access-button {
            display: inline-flex;
            align-items: center;
            gap: 0.7rem;
            padding: 0.42rem 0.9rem 0.42rem 0.42rem;
            border: 1px solid rgba(255,255,255,0.24);
            border-radius: 999px;
            background: rgba(255,255,255,0.12);
            color: white;
            cursor: pointer;
            transition: transform 0.3s, background 0.3s, border-color 0.3s, box-shadow 0.3s;
        }

        .admin-access-button:hover {
            transform: translateY(-2px);
            background: rgba(255,255,255,0.2);
            border-color: rgba(255,255,255,0.42);
            box-shadow: 0 12px 24px rgba(15,23,42,0.22);
        }

        .admin-access-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, rgba(255,255,255,0.28), rgba(255,255,255,0.12));
            color: white;
            font-weight: 700;
            letter-spacing: 0.04em;
            box-shadow: inset 0 1px 0 rgba(255,255,255,0.2), 0 10px 20px rgba(0,0,0,0.18);
        }

        .admin-access-meta {
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            line-height: 1.1;
            min-width: 0;
        }

        .admin-access-label {
            font-size: 0.9rem;
            font-weight: 700;
            max-width: 140px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .admin-access-hint {
            margin-top: 0.14rem;
            font-size: 0.72rem;
            color: rgba(255,255,255,0.82);
            max-width: 140px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .signup-btn {
            background: var(--accent);
            color: white;
            padding: 0.8rem 1.5rem;
            border: none;
            border-radius: 25px;
            cursor: pointer;
            font-weight: bold;
            transition: transform 0.3s, box-shadow 0.3s;
        }

        .signup-btn:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(255,107,107,0.4);
        }

        .account-nav-badge {
            display: none;
            min-width: 1.4rem;
            padding: 0.1rem 0.45rem;
            margin-left: 0.5rem;
            border-radius: 999px;
            background: rgba(255,255,255,0.2);
            color: white;
            font-size: 0.78rem;
            line-height: 1.3;
        }

        .account-nav-badge.visible {
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }

        #accountAccessButton.is-signed-in {
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }

        /* Hero Section */
        .hero {
            background: linear-gradient(rgba(8,18,40,0.56), rgba(8,18,40,0.56)), url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 600"><rect fill="%231c4f9b" width="1200" height="600"/><circle fill="%23f2c94c" opacity="0.22" cx="200" cy="150" r="100"/><circle fill="%230d2d63" opacity="0.34" cx="1000" cy="400" r="150"/><path fill="%23f8e3a1" opacity="0.16" d="M300 500Q400 450 500 500Q600 450 700 500"/></svg>');
            background-size: cover;
            min-height: calc(100vh - var(--header-offset));
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            color: white;
            padding: 0 2rem;
        }

        .hero-content {
            max-width: 920px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.55rem 1rem;
            border-radius: 999px;
            border: 1px solid rgba(255,255,255,0.2);
            background: rgba(255,255,255,0.12);
            backdrop-filter: blur(8px);
            margin-bottom: 1.25rem;
            font-size: 0.95rem;
            animation: fadeInUp 1s ease-out;
        }

        .hero-content h1 {
            font-size: 3.5rem;
            margin-bottom: 1rem;
            animation: fadeInUp 1s ease-out;
        }

        .hero-content p {
            font-size: 1.3rem;
            margin-bottom: 2rem;
            max-width: 600px;
            animation: fadeInUp 1s ease-out 0.2s both;
        }

        .cta-buttons {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
            justify-content: center;
            animation: fadeInUp 1s ease-out 0.4s both;
        }

        .hero-stats {
            display: grid;
            grid-template-columns: repeat(4, minmax(0, 1fr));
            gap: 1rem;
            margin-top: 2rem;
            animation: fadeInUp 1s ease-out 0.6s both;
        }

        .hero-stat {
            padding: 1rem;
            border-radius: 18px;
            background: rgba(255,255,255,0.14);
            border: 1px solid rgba(255,255,255,0.16);
            backdrop-filter: blur(10px);
            box-shadow: 0 12px 24px rgba(0,0,0,0.16);
        }

        .hero-stat-value {
            display: block;
            font-size: 1.8rem;
            font-weight: bold;
            line-height: 1;
            margin-bottom: 0.35rem;
        }

        .hero-stat-label {
            font-size: 0.92rem;
            color: rgba(255,255,255,0.85);
        }

        .hero-note {
            margin-top: 1.25rem;
            color: rgba(255,255,255,0.82);
            font-size: 0.98rem;
            animation: fadeInUp 1s ease-out 0.8s both;
        }

        .btn-primary, .btn-secondary {
            padding: 1rem 2rem;
            border: none;
            border-radius: 30px;
            font-size: 1.1rem;
            font-weight: bold;
            line-height: 1.3;
            white-space: normal;
            cursor: pointer;
            transition: all 0.3s;
        }

        .btn-primary {
            background: var(--accent);
            color: white;
        }

        .btn-primary:hover {
            background: var(--accent-hover);
            transform: translateY(-3px);
            box-shadow: 0 10px 25px rgba(255,107,107,0.4);
        }

        .btn-secondary {
            background: transparent;
            color: white;
            border: 2px solid white;
        }

        .btn-secondary:hover {
            background: white;
            color: #333;
        }

        button:disabled,
        .quiz-level:disabled,
        .btn-primary:disabled,
        .btn-secondary:disabled,
        .signup-btn:disabled,
        .theme-toggle:disabled {
            opacity: 0.7;
            cursor: not-allowed;
            transform: none;
            box-shadow: none;
        }

        .is-loading {
            position: relative;
        }

        .is-loading::after {
            content: "";
            display: inline-block;
            width: 0.95rem;
            height: 0.95rem;
            margin-left: 0.65rem;
            vertical-align: -0.12rem;
            border-radius: 50%;
            border: 2px solid rgba(255,255,255,0.3);
            border-top-color: white;
            animation: spin 0.8s linear infinite;
        }

        button,
        .quiz-level,
        .option,
        .view-history-btn,
        .close {
            touch-action: manipulation;
            -webkit-tap-highlight-color: transparent;
        }

        /* Sections */
        section {
            padding: 5rem 2rem;
            max-width: 1200px;
            margin: 0 auto;
            scroll-margin-top: calc(var(--header-offset) + 1rem);
        }

        h2 {
            text-align: center;
            font-size: 2.5rem;
            margin-bottom: 3rem;
            color: var(--text-color);
        }

        .section-intro {
            text-align: center;
            max-width: 760px;
            margin: -1.5rem auto 3rem;
            color: var(--muted-text);
            font-size: 1.05rem;
        }

        /* Features Section */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 1.5rem;
        }

        .feature-card {
            background: var(--card-bg);
            border-radius: 20px;
            padding: 2rem 1.5rem;
            box-shadow: var(--shadow-soft);
            border: 1px solid var(--border-color);
            transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
        }

        .feature-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-strong);
            border-color: rgba(28, 79, 155, 0.26);
        }

        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, #123a78, #1f5fbf);
            color: white;
            font-size: 1.5rem;
            margin-bottom: 1rem;
        }

        .feature-card h3 {
            color: var(--section-accent);
            margin-bottom: 0.75rem;
            font-size: 1.2rem;
        }

        .feature-card p {
            color: var(--muted-text);
            margin-bottom: 1rem;
        }

        .feature-card-action {
            width: 100%;
            margin-top: 1.1rem;
        }

        .feature-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
        }

        .feature-tag {
            display: inline-block;
            padding: 0.35rem 0.7rem;
            border-radius: 999px;
            background: var(--surface-bg);
            color: var(--text-color);
            font-size: 0.85rem;
            border: 1px solid var(--border-color);
        }

        /* About Section */
        .about-layout {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 2rem;
            align-items: start;
        }

        .about-panel,
        .about-stats-panel {
            background: var(--card-bg);
            border-radius: 24px;
            padding: 2rem;
            box-shadow: var(--shadow-soft);
            border: 1px solid var(--border-color);
        }

        .about-panel h3,
        .about-stats-panel h3 {
            color: var(--section-accent);
            margin-bottom: 1rem;
            font-size: 1.35rem;
        }

        .about-panel p {
            color: var(--muted-text);
            margin-bottom: 1rem;
        }

        .about-points {
            display: grid;
            gap: 0.9rem;
            margin: 1.5rem 0;
        }

        .about-point {
            padding: 0.95rem 1rem;
            border-radius: 16px;
            background: var(--surface-bg);
            color: var(--text-color);
            border: 1px solid var(--border-color);
        }

        .about-point strong {
            display: block;
            margin-bottom: 0.25rem;
            color: var(--section-accent);
        }

        .about-stats-grid {
            display: grid;
            grid-template-columns: repeat(2, minmax(0, 1fr));
            gap: 1rem;
            margin-top: 1.25rem;
        }

        .about-stat {
            padding: 1.1rem 1rem;
            border-radius: 18px;
            background: var(--surface-bg);
            border: 1px solid var(--border-color);
        }

        .about-stat-value {
            font-size: 2rem;
            font-weight: bold;
            color: var(--section-accent);
            line-height: 1;
            margin-bottom: 0.35rem;
        }

        .about-stat-label {
            color: var(--muted-text);
            font-size: 0.95rem;
        }

        .about-cta {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin-top: 1.5rem;
        }

        /* Community Section */
        .community-layout {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 2rem;
            align-items: start;
        }

        .community-panel,
        .community-stats-panel {
            background: var(--card-bg);
            border-radius: 24px;
            padding: 2rem;
            box-shadow: var(--shadow-soft);
            border: 1px solid var(--border-color);
        }

        .community-panel h3,
        .community-stats-panel h3 {
            color: var(--section-accent);
            margin-bottom: 1rem;
            font-size: 1.35rem;
        }

        .community-panel p {
            color: var(--muted-text);
            margin-bottom: 1rem;
        }

        .community-points {
            display: grid;
            gap: 0.9rem;
            margin: 1.5rem 0;
        }

        .community-point {
            padding: 1rem;
            border-radius: 16px;
            background: var(--surface-bg);
            color: var(--text-color);
            border: 1px solid var(--border-color);
        }

        .community-point strong {
            display: block;
            margin-bottom: 0.25rem;
            color: var(--section-accent);
        }

        .community-cta {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin-top: 1.5rem;
        }

        .community-stats-grid {
            display: grid;
            grid-template-columns: repeat(2, minmax(0, 1fr));
            gap: 1rem;
            margin-top: 1.25rem;
        }

        .community-stat {
            padding: 1.1rem 1rem;
            border-radius: 18px;
            background: var(--surface-bg);
            border: 1px solid var(--border-color);
        }

        .community-stat-value {
            font-size: 1.4rem;
            font-weight: bold;
            color: var(--section-accent);
            line-height: 1.2;
            margin-bottom: 0.35rem;
        }

        .community-stat-label {
            color: var(--muted-text);
            font-size: 0.95rem;
        }

        .community-activity {
            margin-top: 1.25rem;
            padding: 1.1rem 1rem;
            border-radius: 18px;
            background: linear-gradient(135deg, rgba(28, 79, 155, 0.12), rgba(200, 155, 25, 0.10));
            border: 1px solid rgba(28, 79, 155, 0.16);
        }

        .community-activity-label {
            color: var(--section-accent);
            font-weight: bold;
            margin-bottom: 0.4rem;
        }

        .community-activity-value {
            color: var(--text-color);
            line-height: 1.5;
        }

        /* Quizzes Section */
        .quizzes-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 2rem;
        }

        .quiz-category {
            background: var(--card-bg);
            border-radius: 20px;
            padding: 2rem;
            box-shadow: var(--shadow-soft);
            transition: transform 0.3s, box-shadow 0.3s;
            text-align: center;
        }

        .quiz-category:hover {
            transform: translateY(-10px);
            box-shadow: var(--shadow-strong);
        }

        .quiz-category-locked {
            display: grid;
            gap: 1rem;
            align-content: center;
            text-align: left;
            min-height: 260px;
        }

        .quiz-gate-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 0.85rem;
        }

        .quiz-gate-actions .btn-primary,
        .quiz-gate-actions .btn-secondary {
            flex: 1 1 180px;
        }

        .quiz-category h3 {
            color: var(--section-accent);
            margin-bottom: 1rem;
            font-size: 1.5rem;
        }

        .quiz-levels {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }

        .quiz-level {
            background: linear-gradient(135deg, #123a78, #1f5fbf);
            color: white;
            padding: 1rem;
            border-radius: 10px;
            cursor: pointer;
            transition: all 0.3s;
            font-weight: 500;
            user-select: none;
        }

        .quiz-level:hover {
            transform: scale(1.05);
            box-shadow: 0 5px 15px rgba(28, 79, 155, 0.28);
        }

        .quiz-access-note {
            margin-bottom: 1rem;
            padding: 0.8rem 0.95rem;
            border-radius: 14px;
            border: 1px solid rgba(59, 130, 246, 0.18);
            background: linear-gradient(135deg, rgba(28, 79, 155, 0.08), rgba(200, 155, 25, 0.10));
            color: var(--muted-text);
            line-height: 1.55;
        }

        .quiz-access-note strong {
            display: block;
            margin-bottom: 0.2rem;
            color: var(--text-color);
        }

        /* Leaderboard */
        .leaderboard {
            background: var(--surface-bg);
        }

        .leaderboard-table {
            width: 100%;
            background: var(--card-bg);
            border-radius: 15px;
            overflow: hidden;
            box-shadow: var(--shadow-soft);
        }

        .leaderboard-toolbar {
            display: grid;
            gap: 1rem;
            margin: 1.25rem 0 1rem;
            padding: 1rem 1.1rem;
            border-radius: 22px;
            border: 1px solid var(--border-color);
            background: linear-gradient(180deg, var(--card-bg), var(--surface-bg));
            box-shadow: var(--shadow-soft);
        }

        .leaderboard-search-group {
            margin: 0;
        }

        .leaderboard-filter-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 0.85rem;
        }

        .leaderboard-toolbar-actions {
            display: flex;
            justify-content: flex-end;
        }

        .leaderboard-reset-button {
            min-width: 160px;
        }

        .leaderboard-summary {
            text-align: left;
            margin: 0 0 1rem;
            max-width: none;
        }

        .leaderboard-table thead {
            background: linear-gradient(135deg, #123a78, #1f5fbf);
            color: white;
        }

        .leaderboard-table th,
        .leaderboard-table td {
            padding: 1.5rem;
            text-align: left;
            vertical-align: top;
        }

        .leaderboard-table tr {
            border-bottom: 1px solid var(--border-color);
        }

        .leaderboard-table tr:hover {
            background: var(--surface-hover);
        }

        .rank {
            font-weight: bold;
            font-size: 1.2rem;
            width: 60px;
        }

        .rank-1 { color: #ffd700; }
        .rank-2 { color: #c0c0c0; }
        .rank-3 { color: #cd7f32; }

        .leaderboard-status-badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.32rem 0.72rem;
            border-radius: 999px;
            background: rgba(28, 79, 155, 0.12);
            color: var(--section-accent);
            font-size: 0.78rem;
            font-weight: 700;
            white-space: nowrap;
        }

        .leaderboard-status-badge.is-success {
            background: rgba(34, 197, 94, 0.12);
            color: #15803d;
        }

        .leaderboard-status-badge.is-warning {
            background: rgba(245, 158, 11, 0.16);
            color: #b45309;
        }

        .leaderboard-status-badge.is-danger {
            background: rgba(239, 68, 68, 0.14);
            color: #b91c1c;
        }

        .completed-quiz-title {
            font-weight: bold;
            margin-bottom: 0.25rem;
            color: var(--text-color);
        }

        .completed-quiz-meta {
            color: var(--muted-text);
            font-size: 0.95rem;
            line-height: 1.5;
        }

        .view-history-btn {
            margin-top: 0.8rem;
            padding: 0.7rem 1rem;
            border: none;
            border-radius: 999px;
            background: var(--section-accent);
            color: white;
            cursor: pointer;
            font-weight: bold;
            transition: transform 0.3s, opacity 0.3s;
        }

        .view-history-btn:hover {
            transform: translateY(-1px);
            opacity: 0.92;
        }

        .secondary-action-btn,
        .danger-btn,
        .admin-auth-btn {
            margin-top: 0.8rem;
            padding: 0.7rem 1rem;
            border: none;
            border-radius: 999px;
            color: white;
            cursor: pointer;
            font-weight: bold;
            transition: transform 0.3s, opacity 0.3s;
        }

        .secondary-action-btn,
        .admin-auth-btn {
            background: #2563eb;
        }

        .danger-btn {
            background: #dc2626;
        }

        .secondary-action-btn:hover,
        .danger-btn:hover,
        .admin-auth-btn:hover {
            transform: translateY(-1px);
            opacity: 0.92;
        }

        .admin-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 1rem;
            margin-top: 1.25rem;
            align-items: start;
            grid-auto-flow: row dense;
        }

        .admin-summary-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 0.85rem;
            margin-top: 1rem;
            align-items: start;
        }

        .admin-summary-card {
            padding: 0.95rem 1rem;
            border-radius: 16px;
            border: 1px solid var(--border-color);
            background: linear-gradient(180deg, var(--surface-bg), var(--card-bg));
            box-shadow: var(--shadow-soft);
        }

        .admin-summary-label {
            color: var(--muted-text);
            font-size: 0.78rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            margin-bottom: 0.45rem;
        }

        .admin-summary-value {
            color: var(--text-color);
            font-size: 1.25rem;
            font-weight: 700;
        }

        .admin-card {
            padding: 1.15rem;
            border-radius: 18px;
            border: 1px solid var(--border-color);
            background: var(--surface-bg);
            box-shadow: var(--shadow-soft);
            min-width: 0;
            display: flex;
            flex-direction: column;
            grid-column: auto;
            gap: 0.2rem;
            transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
        }

        .admin-card[hidden] {
            display: none !important;
        }

        .admin-card-wide {
            grid-column: 1 / -1;
        }

        [data-admin-section-block][hidden] {
            display: none !important;
        }

        .admin-card h3 {
            margin-bottom: 0.75rem;
            color: var(--section-accent);
            font-size: 1.05rem;
        }

        .admin-card:hover {
            transform: translateY(-2px);
            border-color: rgba(102, 126, 234, 0.18);
            box-shadow: var(--shadow-strong);
        }

        .admin-note,
        .admin-status,
        .report-meta {
            color: var(--muted-text);
            font-size: 0.95rem;
            line-height: 1.5;
            overflow-wrap: anywhere;
        }

        .admin-status {
            margin-top: 0.75rem;
        }

        .admin-form-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
            margin-top: 0.25rem;
        }

        .admin-form-actions .btn-primary,
        .admin-form-actions .btn-secondary {
            flex: 1 1 220px;
        }

        .admin-list {
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
            margin-top: 1rem;
            max-height: 260px;
            overflow-y: auto;
        }

        .admin-list-item {
            padding: 0.9rem 1rem;
            border-radius: 14px;
            border: 1px solid var(--border-color);
            background: var(--card-bg);
            transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
        }

        .admin-list-item:hover {
            transform: translateY(-2px);
            border-color: rgba(102, 126, 234, 0.28);
            box-shadow: var(--shadow-soft);
        }

        .admin-list-item.is-selected {
            border-color: rgba(59, 130, 246, 0.32);
            background:
                radial-gradient(circle at top right, rgba(59, 130, 246, 0.1), transparent 30%),
                var(--card-bg);
            box-shadow: 0 18px 36px rgba(59, 130, 246, 0.12);
        }

        .admin-list-title {
            font-weight: bold;
            color: var(--text-color);
            margin-bottom: 0.3rem;
            overflow-wrap: anywhere;
        }

        .admin-list-avatar-row {
            display: flex;
            gap: 0.85rem;
            align-items: flex-start;
        }

        .admin-list-avatar {
            width: 48px;
            height: 48px;
            border-radius: 18px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            flex: 0 0 auto;
            background: linear-gradient(135deg, var(--section-accent), var(--accent));
            color: white;
            font-weight: 700;
            letter-spacing: 0.04em;
            box-shadow: 0 12px 20px rgba(0,0,0,0.16);
        }

        .admin-list-copy {
            flex: 1;
            min-width: 0;
        }

        .admin-list-meta {
            color: var(--muted-text);
            font-size: 0.92rem;
            line-height: 1.5;
            overflow-wrap: anywhere;
        }

        .admin-list-purpose {
            margin-top: 0.45rem;
            color: var(--text-color);
        }

        .admin-list-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 0.45rem;
            margin-bottom: 0.55rem;
        }

        .admin-list-badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.26rem 0.68rem;
            border-radius: 999px;
            background: rgba(102, 126, 234, 0.12);
            color: var(--section-accent);
            font-size: 0.74rem;
            font-weight: 700;
        }

        .admin-list-badge.is-success {
            background: rgba(34, 197, 94, 0.12);
            color: #15803d;
        }

        .admin-list-badge.is-warning {
            background: rgba(245, 158, 11, 0.14);
            color: #b45309;
        }

        .admin-list-badge.is-danger {
            background: rgba(239, 68, 68, 0.12);
            color: #b91c1c;
        }

        .admin-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem;
            margin-top: 0.75rem;
        }

        .admin-actions button {
            margin-top: 0;
        }

        .secondary-action-btn.is-active {
            border-color: rgba(59, 130, 246, 0.32);
            background: rgba(59, 130, 246, 0.12);
            color: var(--section-accent);
            box-shadow: none;
        }

        .admin-inline-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 0.9rem;
            align-items: start;
        }

        .admin-inline-grid .form-group {
            margin-bottom: 1rem;
        }

        .admin-catalog-preview-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 1rem;
            margin-top: 1rem;
        }

        .admin-catalog-preview-card {
            padding: 1rem 1.05rem;
            border-radius: 20px;
            border: 1px solid var(--border-color);
            background:
                radial-gradient(circle at top right, rgba(99, 102, 241, 0.08), transparent 32%),
                var(--surface-bg);
            box-shadow: var(--shadow-soft);
        }

        .admin-catalog-preview-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 0.75rem;
            margin-bottom: 0.65rem;
        }

        .admin-catalog-preview-title {
            font-weight: 800;
            color: var(--text-color);
            line-height: 1.35;
        }

        .admin-catalog-preview-levels {
            display: flex;
            flex-wrap: wrap;
            gap: 0.55rem;
            margin-top: 0.85rem;
        }

        .admin-catalog-preview-level {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.42rem 0.72rem;
            border-radius: 999px;
            background: rgba(102, 126, 234, 0.12);
            color: var(--section-accent);
            font-size: 0.8rem;
            font-weight: 700;
        }

        .admin-catalog-preview-level.is-muted {
            background: rgba(148, 163, 184, 0.14);
            color: var(--muted-text);
        }

        .admin-preview-empty-state {
            padding: 1rem 1.05rem;
            border-radius: 18px;
            border: 1px dashed rgba(102, 126, 234, 0.24);
            background: var(--surface-bg);
            color: var(--muted-text);
            line-height: 1.6;
        }

        .admin-community-toolbar {
            margin: 0.4rem 0 1rem;
        }

        .admin-community-roster-wrap {
            margin-bottom: 1rem;
            padding: 1rem;
            border-radius: 18px;
            border: 1px solid var(--border-color);
            background: linear-gradient(180deg, rgba(255,255,255,0.72), rgba(255,255,255,0.96));
            box-shadow: var(--shadow-soft);
        }

        .admin-community-roster-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            margin-bottom: 0.9rem;
        }

        .admin-community-roster-head h4 {
            margin: 0;
            color: var(--text-color);
        }

        .admin-community-roster-item {
            width: 100%;
            display: block;
            text-align: left;
            cursor: pointer;
            appearance: none;
            font: inherit;
        }

        .admin-community-roster-item.is-muted {
            opacity: 0.82;
        }

        .admin-selection-card {
            margin-bottom: 1rem;
            padding: 1rem 1.05rem;
            border-radius: 20px;
            border: 1px solid var(--border-color);
            background:
                radial-gradient(circle at top right, rgba(59, 130, 246, 0.08), transparent 32%),
                var(--surface-bg);
            box-shadow: var(--shadow-soft);
        }

        .admin-community-log-wrap {
            margin-top: 1rem;
        }

        .admin-list-tall {
            max-height: 420px;
        }

        .admin-session-banner {
            display: flex;
            align-items: flex-start;
            gap: 1rem;
            margin-top: 1rem;
            padding: 1.15rem;
            border-radius: 24px;
            border: 1px solid var(--border-color);
            background: linear-gradient(180deg, var(--surface-bg), var(--card-bg));
            box-shadow: var(--shadow-soft);
        }

        .admin-session-avatar,
        .admin-reason-avatar {
            width: 56px;
            height: 56px;
            border-radius: 20px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            flex: 0 0 auto;
            background: linear-gradient(135deg, var(--section-accent), var(--accent));
            color: white;
            font-size: 1.1rem;
            font-weight: 700;
            box-shadow: 0 16px 24px rgba(0,0,0,0.16);
        }

        .admin-session-copy {
            display: flex;
            flex-direction: column;
            gap: 0.35rem;
            min-width: 0;
        }

        .admin-session-name {
            color: var(--text-color);
            font-size: 1.12rem;
            font-weight: 700;
        }

        .admin-shell-layout {
            display: grid;
            grid-template-columns: 260px minmax(0, 1fr);
            gap: 1.1rem;
            min-height: 78vh;
        }

        .admin-sidebar {
            display: flex;
            flex-direction: column;
            gap: 1rem;
            padding: 1.35rem;
            border-radius: 28px;
            background:
                radial-gradient(circle at top right, rgba(251, 191, 36, 0.22), transparent 35%),
                linear-gradient(180deg, #163142, #0f172a);
            color: white;
            box-shadow: 0 24px 48px rgba(15, 23, 42, 0.24);
        }

        .admin-sidebar-top {
            border-bottom: 1px solid rgba(255,255,255,0.12);
            padding-bottom: 1rem;
        }

        .admin-sidebar-avatar-wrap {
            display: flex;
            align-items: center;
            gap: 0.85rem;
            margin-bottom: 1rem;
        }

        .admin-sidebar-status {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.38rem 0.82rem;
            border-radius: 999px;
            background: rgba(255,255,255,0.14);
            color: white;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.03em;
        }

        .admin-sidebar-name {
            margin: 0 0 0.45rem;
            color: white;
            font-size: 1.45rem;
        }

        .admin-sidebar-note {
            color: rgba(255,255,255,0.76);
            margin-top: 0;
            overflow-wrap: anywhere;
        }

        .admin-section-nav {
            display: grid;
            gap: 0.7rem;
        }

        .admin-section-button {
            width: 100%;
            text-align: left;
            padding: 0.95rem 1rem;
            border: 1px solid rgba(255,255,255,0.12);
            border-radius: 18px;
            background: rgba(255,255,255,0.05);
            color: rgba(255,255,255,0.88);
            font-weight: 700;
            line-height: 1.35;
            white-space: normal;
            cursor: pointer;
            transition: transform 0.25s, background 0.25s, color 0.25s, border-color 0.25s;
        }

        .admin-section-button:hover,
        .admin-section-button.active {
            transform: translateX(4px);
            background: white;
            color: #0f172a;
            border-color: white;
        }

        .admin-section-button[hidden] {
            display: none !important;
        }

        .admin-sidebar-panel {
            margin-top: 0.35rem;
            padding: 1rem;
            border-radius: 22px;
            border: 1px solid rgba(255,255,255,0.12);
            background: rgba(255,255,255,0.08);
            box-shadow: inset 0 1px 0 rgba(255,255,255,0.06);
        }

        .admin-sidebar-panel-label {
            color: rgba(255,255,255,0.7);
            font-size: 0.78rem;
            font-weight: 800;
            letter-spacing: 0.08em;
            text-transform: uppercase;
        }

        .admin-sidebar-panel-value {
            margin-top: 0.55rem;
            color: white;
            font-size: 1.1rem;
            font-weight: 700;
            line-height: 1.35;
        }

        .admin-sidebar-panel-meta {
            margin-top: 0.5rem;
            color: rgba(255,255,255,0.76);
            font-size: 0.92rem;
            line-height: 1.55;
            overflow-wrap: anywhere;
        }

        .admin-sidebar .btn-secondary {
            border-color: rgba(255,255,255,0.22);
            color: white;
        }

        .admin-sidebar .btn-secondary:hover {
            background: white;
            color: #0f172a;
        }

        .admin-main {
            display: flex;
            flex-direction: column;
            gap: 1rem;
            min-width: 0;
        }

        .admin-main[data-section="security"] .admin-card,
        .admin-main[data-section="community"] .admin-card {
            grid-column: 1 / -1;
        }

        .admin-panel-intro {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 1rem;
            padding: 1.15rem 1.2rem;
            border-radius: 24px;
            border: 1px solid var(--border-color);
            background:
                radial-gradient(circle at top right, rgba(102, 126, 234, 0.12), transparent 32%),
                linear-gradient(180deg, var(--surface-bg), var(--card-bg));
            box-shadow: var(--shadow-soft);
        }

        .admin-panel-intro h2 {
            margin-bottom: 0.45rem;
        }

        .admin-panel-intro-copy {
            flex: 1;
            min-width: 0;
        }

        .admin-panel-intro-status {
            display: grid;
            gap: 0.7rem;
            min-width: 220px;
        }

        .admin-panel-intro-chip {
            padding: 0.9rem 1rem;
            border-radius: 18px;
            border: 1px solid var(--border-color);
            background: var(--surface-bg);
            box-shadow: var(--shadow-soft);
        }

        .admin-panel-intro-chip span {
            display: block;
            margin-bottom: 0.35rem;
            color: var(--muted-text);
            font-size: 0.76rem;
            font-weight: 800;
            letter-spacing: 0.08em;
            text-transform: uppercase;
        }

        .admin-panel-intro-chip strong {
            color: var(--text-color);
            line-height: 1.4;
            overflow-wrap: anywhere;
        }

        .admin-reason-modal-content {
            max-width: 560px;
        }

        .admin-reason-profile {
            display: flex;
            align-items: center;
            gap: 1rem;
            margin-bottom: 1.15rem;
            padding: 1rem;
            border-radius: 22px;
            border: 1px solid var(--border-color);
            background: linear-gradient(180deg, var(--surface-bg), var(--card-bg));
        }

        .admin-reason-copy h2 {
            margin-bottom: 0.25rem;
        }

        .admin-target-field[hidden] {
            display: none !important;
        }

        .report-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
            padding: 0.3rem 0.75rem;
            border-radius: 999px;
            background: rgba(220, 38, 38, 0.12);
            color: #b91c1c;
            font-size: 0.82rem;
            font-weight: bold;
            margin-top: 0.6rem;
        }

        .history-list {
            display: flex;
            flex-direction: column;
            gap: 1rem;
            margin-top: 1.5rem;
        }

        .history-summary {
            margin-top: 1rem;
            padding: 1rem 1.1rem;
            border-radius: 16px;
            border: 1px solid var(--border-color);
            background: var(--surface-bg);
        }

        .history-summary-title {
            font-weight: bold;
            margin-bottom: 0.35rem;
            color: var(--text-color);
        }

        .history-summary-meta {
            color: var(--muted-text);
            font-size: 0.95rem;
            line-height: 1.5;
        }

        .custom-quiz-summary {
            margin-top: 1rem;
            padding: 1rem;
            border-radius: 14px;
            background: var(--surface-bg);
            color: var(--muted-text);
            border: 1px solid var(--border-color);
            line-height: 1.6;
        }

        .custom-quiz-summary.empty-state,
        .quiz-empty-state {
            border-style: dashed;
        }

        .quiz-empty-state {
            padding: 1rem;
            border-radius: 14px;
            background: var(--surface-bg);
            color: var(--muted-text);
            line-height: 1.55;
            text-align: left;
        }

        .quiz-empty-title {
            display: block;
            color: var(--text-color);
            font-weight: bold;
            margin-bottom: 0.3rem;
        }

        .custom-quiz-actions {
            display: flex;
            justify-content: flex-end;
            margin-top: 1.5rem;
        }

        .history-item {
            padding: 1rem 1.1rem;
            border-radius: 16px;
            border: 1px solid var(--border-color);
            background: var(--surface-bg);
        }

        .history-item-title {
            font-weight: bold;
            font-size: 1.05rem;
            margin-bottom: 0.4rem;
            color: var(--text-color);
        }

        .history-item-meta {
            color: var(--muted-text);
            font-size: 0.95rem;
            line-height: 1.5;
        }

        .leaderboard-empty {
            text-align: center;
            color: var(--muted-text);
        }

        /* Footer */
        footer {
            background: var(--footer-bg);
            color: white;
            padding: 3rem 2rem 1rem;
        }

        .footer-content {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }

        .footer-section h4 {
            margin-bottom: 1rem;
            color: #ff6b6b;
        }

        .footer-news-line {
            color: var(--footer-link);
            line-height: 1.7;
            margin: 0 0 0.75rem;
        }

        .footer-section a {
            color: var(--footer-link);
            text-decoration: none;
            display: block;
            margin-bottom: 0.5rem;
        }

        .footer-section a:hover {
            color: white;
        }

        .footer-team-list {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
        }

        .footer-name-tag {
            display: inline-flex;
            align-items: center;
            padding: 0.65rem 1rem;
            border: 1px solid rgba(255, 255, 255, 0.14);
            border-radius: 999px;
            background: linear-gradient(135deg, rgba(255, 107, 107, 0.2), rgba(102, 126, 234, 0.18));
            color: white;
            font-weight: 600;
            letter-spacing: 0.01em;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.18);
        }

        /* Modal */
        .modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            overflow-y: auto;
            background: var(--modal-overlay);
            z-index: 2000;
            animation: fadeIn 0.3s;
        }

        .modal-content {
            background: var(--card-bg);
            margin: max(1rem, 4vh) auto;
            padding: 2rem;
            border-radius: 20px;
            width: 90%;
            max-width: 500px;
            max-height: calc(100vh - 2rem);
            overflow-y: auto;
            animation: slideIn 0.3s;
            color: var(--text-color);
            box-shadow: var(--shadow-soft);
        }

        .modal-content .btn-secondary {
            color: var(--text-color);
            border-color: var(--border-color);
        }

        .modal-content .btn-secondary:hover {
            background: var(--surface-hover);
            color: var(--text-color);
        }

        .history-modal-content {
            max-width: 680px;
        }

        .result-modal-content {
            max-width: 580px;
        }

        .admin-modal-content {
            max-width: 1180px;
        }

        .admin-modal-topbar {
            display: flex;
            justify-content: flex-end;
            align-items: center;
            gap: 0.85rem;
            margin-bottom: 0.85rem;
        }

        .admin-modal-hide-button {
            min-width: 132px;
        }

        .admin-panel-dock {
            position: fixed;
            right: 1.25rem;
            bottom: 1.25rem;
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            gap: 0.28rem;
            min-width: 220px;
            padding: 0.95rem 1rem;
            border: 1px solid rgba(15, 23, 42, 0.14);
            border-radius: 20px;
            background:
                radial-gradient(circle at top right, rgba(102, 126, 234, 0.18), transparent 40%),
                linear-gradient(180deg, rgba(255,255,255,0.98), rgba(244,247,255,0.96));
            color: var(--text-color);
            box-shadow: 0 24px 44px rgba(15, 23, 42, 0.22);
            z-index: 1995;
            text-align: left;
            cursor: pointer;
            transition: transform 0.25s, box-shadow 0.25s;
        }

        .admin-panel-dock[hidden] {
            display: none !important;
        }

        .admin-panel-dock:hover {
            transform: translateY(-2px);
            box-shadow: 0 28px 50px rgba(15, 23, 42, 0.26);
        }

        .admin-panel-dock-kicker {
            color: var(--primary-color);
            font-size: 0.72rem;
            font-weight: 800;
            letter-spacing: 0.08em;
            text-transform: uppercase;
        }

        .admin-panel-dock strong {
            font-size: 1rem;
            line-height: 1.3;
        }

        .admin-panel-dock span:last-child {
            color: var(--muted-text);
            font-size: 0.88rem;
            line-height: 1.45;
        }

        .close {
            float: right;
            font-size: 2rem;
            cursor: pointer;
            color: var(--muted-text);
        }

        .close:hover {
            color: var(--text-color);
        }

        .form-group {
            margin-bottom: 1.5rem;
        }

        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: bold;
        }

        .form-group input,
        .form-group select,
        .form-group textarea {
            width: 100%;
            padding: 1rem;
            border: 2px solid var(--border-color);
            border-radius: 10px;
            font-size: 1rem;
            background: var(--input-bg);
            color: var(--text-color);
        }

        .form-group input:focus,
        .form-group select:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: #1c4f9b;
        }

        .form-group textarea {
            resize: vertical;
            min-height: 128px;
        }

        .profile-note {
            margin-top: 0.9rem;
            color: var(--muted-text);
            font-size: 0.95rem;
            line-height: 1.5;
        }

        .status-info {
            color: var(--muted-text);
        }

        .status-success {
            color: #15803d;
        }

        .status-error {
            color: #b91c1c;
        }

        .account-modal-content {
            max-width: 1100px;
        }

        .account-modal-header {
            display: flex;
            align-items: center;
            gap: 1rem;
            margin-bottom: 1.4rem;
        }

        .account-modal-copy h2 {
            margin-bottom: 0.35rem;
        }

        .account-modal-copy .profile-note {
            margin-top: 0;
        }

        .account-avatar {
            width: 72px;
            height: 72px;
            border-radius: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, #123a78, #c89b19);
            color: white;
            font-size: 1.45rem;
            font-weight: bold;
            box-shadow: var(--shadow-soft);
        }

        .account-overview-grid {
            display: grid;
            grid-template-columns: repeat(4, minmax(0, 1fr));
            gap: 1rem;
            margin-bottom: 1.25rem;
        }

        .account-overview-card,
        .account-panel {
            border: 1px solid var(--border-color);
            border-radius: 20px;
            background: var(--surface-bg);
            box-shadow: var(--shadow-soft);
        }

        .account-overview-card {
            padding: 1rem 1.1rem;
        }

        .account-overview-label {
            font-size: 0.8rem;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--muted-text);
            margin-bottom: 0.45rem;
        }

        .account-overview-value {
            font-size: 1.1rem;
            font-weight: bold;
            color: var(--text-color);
        }

        .account-quick-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
            margin-bottom: 1.25rem;
        }

        .account-inline-action {
            flex: 1 1 180px;
        }

        .account-layout {
            display: grid;
            grid-template-columns: repeat(2, minmax(0, 1fr));
            gap: 1rem;
            margin-bottom: 1rem;
        }

        .account-panel {
            padding: 1.25rem;
        }

        .account-panel h3 {
            margin-bottom: 1rem;
        }

        .account-panel-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            margin-bottom: 1rem;
        }

        .account-chip {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.35rem 0.75rem;
            border-radius: 999px;
            background: rgba(102, 126, 234, 0.12);
            color: var(--section-accent);
            font-size: 0.82rem;
            font-weight: bold;
        }

        .account-checkbox {
            display: flex;
            align-items: flex-start;
            gap: 0.7rem;
            padding: 0.9rem 1rem;
            margin-bottom: 0.75rem;
            border-radius: 14px;
            border: 1px solid var(--border-color);
            background: var(--card-bg);
            cursor: pointer;
        }

        .account-checkbox input {
            width: 1rem;
            height: 1rem;
            margin-top: 0.1rem;
            accent-color: #1c4f9b;
        }

        .account-checkbox span {
            color: var(--text-color);
            line-height: 1.5;
        }

        .account-settings-actions {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0.75rem;
            margin-top: 1rem;
        }

        .account-message-list,
        .feedback-history-list {
            display: flex;
            flex-direction: column;
            gap: 0.85rem;
        }

        .account-message-item,
        .feedback-history-item {
            padding: 1rem;
            border-radius: 16px;
            border: 1px solid var(--border-color);
            background: var(--card-bg);
        }

        .account-message-item.unread {
            border-color: rgba(28, 79, 155, 0.26);
            background: linear-gradient(135deg, rgba(102, 126, 234, 0.08), var(--card-bg));
        }

        .account-message-top,
        .feedback-history-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 0.75rem;
            margin-bottom: 0.55rem;
        }

        .account-message-type,
        .feedback-history-type {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.25rem 0.65rem;
            border-radius: 999px;
            background: rgba(255, 107, 107, 0.12);
            color: var(--accent);
            font-size: 0.78rem;
            font-weight: bold;
            text-transform: capitalize;
        }

        .account-message-time,
        .feedback-history-time {
            color: var(--muted-text);
            font-size: 0.84rem;
        }

        .account-message-title,
        .feedback-history-title {
            font-weight: bold;
            color: var(--text-color);
            margin-bottom: 0.35rem;
        }

        .account-message-body,
        .feedback-history-body {
            color: var(--muted-text);
            line-height: 1.55;
        }

        .feedback-history-status {
            margin-top: 0.65rem;
            color: var(--section-accent);
            font-size: 0.88rem;
            font-weight: 600;
        }

        .account-empty-state {
            padding: 1rem;
            border-radius: 16px;
            border: 1px dashed var(--border-color);
            color: var(--muted-text);
            text-align: center;
            background: var(--card-bg);
        }

        .account-access-button {
            position: relative;
            display: inline-flex;
            align-items: center;
            gap: 0.7rem;
            padding: 0.45rem 0.9rem 0.45rem 0.45rem;
            border: 1px solid rgba(255,255,255,0.24);
            border-radius: 999px;
            background: rgba(255,255,255,0.12);
            color: white;
            cursor: pointer;
            transition: transform 0.3s, background 0.3s, border-color 0.3s;
        }

        .account-access-button:hover {
            transform: translateY(-2px);
            background: rgba(255,255,255,0.2);
            border-color: rgba(255,255,255,0.4);
        }

        .account-access-presence {
            width: 0.65rem;
            height: 0.65rem;
            border-radius: 50%;
            background: rgba(255,255,255,0.35);
            box-shadow: 0 0 0 3px rgba(255,255,255,0.08);
            transition: background 0.3s ease, box-shadow 0.3s ease;
        }

        .account-access-button.is-signed-in .account-access-presence {
            background: #34d399;
        }

        .account-access-avatar {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, #f97316, #ef4444);
            color: white;
            font-weight: 700;
            letter-spacing: 0.03em;
            box-shadow: 0 10px 24px rgba(0,0,0,0.18);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .account-access-button:hover .account-access-avatar {
            transform: scale(1.04);
            box-shadow: 0 14px 30px rgba(0,0,0,0.22);
        }

        .account-access-text {
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            line-height: 1.1;
        }

        .account-access-label {
            font-size: 0.92rem;
            font-weight: 700;
        }

        .account-access-hint {
            margin-top: 0.15rem;
            font-size: 0.74rem;
            color: rgba(255,255,255,0.82);
        }

        .account-access-badge {
            display: none;
            min-width: 1.45rem;
            height: 1.45rem;
            padding: 0 0.38rem;
            border-radius: 999px;
            align-items: center;
            justify-content: center;
            background: #fef3c7;
            color: #92400e;
            font-size: 0.74rem;
            font-weight: 700;
        }

        .account-access-badge.visible {
            display: inline-flex;
            animation: pulseBadge 1.8s ease-in-out infinite;
        }

        .updates-access-button {
            position: relative;
            display: inline-flex;
            align-items: center;
            gap: 0.7rem;
            padding: 0.45rem 0.9rem 0.45rem 0.55rem;
            border: 1px solid rgba(255,255,255,0.24);
            border-radius: 999px;
            background: rgba(255,255,255,0.12);
            color: white;
            cursor: pointer;
            transition: transform 0.3s, background 0.3s, border-color 0.3s, box-shadow 0.3s;
        }

        .updates-access-button:hover,
        .updates-access-button.has-unread {
            transform: translateY(-2px);
            background: rgba(255,255,255,0.2);
            border-color: rgba(255,255,255,0.4);
        }

        .updates-access-button.needs-attention {
            transform: translateY(-2px);
            background: linear-gradient(135deg, rgba(250, 204, 21, 0.26), rgba(249, 115, 22, 0.22));
            border-color: rgba(250, 204, 21, 0.62);
            box-shadow: 0 18px 34px rgba(15, 23, 42, 0.22);
        }

        .updates-access-button.needs-attention .updates-access-icon {
            animation: pulseBadge 1.4s ease-in-out infinite;
            box-shadow: 0 12px 28px rgba(249, 115, 22, 0.34);
        }

        .updates-access-icon {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, #f59e0b, #ef4444);
            color: white;
            font-size: 1.2rem;
            box-shadow: 0 10px 24px rgba(0,0,0,0.18);
        }

        .updates-access-text {
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            line-height: 1.1;
        }

        .updates-access-label {
            font-size: 0.92rem;
            font-weight: 700;
        }

        .updates-access-hint {
            margin-top: 0.15rem;
            font-size: 0.74rem;
            color: rgba(255,255,255,0.82);
        }

        .updates-access-badge {
            display: none;
            min-width: 24px;
            height: 24px;
            padding: 0 0.45rem;
            align-items: center;
            justify-content: center;
            border-radius: 999px;
            background: #facc15;
            color: #111827;
            font-size: 0.72rem;
            font-weight: 800;
            box-shadow: 0 8px 18px rgba(0,0,0,0.18);
        }

        .updates-access-badge.visible {
            display: inline-flex;
        }

        .auth-modal-content {
            max-width: 640px;
            padding: 1.35rem;
            border-radius: 28px;
            background:
                radial-gradient(circle at top right, rgba(99, 102, 241, 0.12), transparent 34%),
                linear-gradient(180deg, #ffffff, #f8fafc);
        }

        .auth-modal-header {
            margin-bottom: 1.1rem;
            padding: 1.15rem;
            border-radius: 24px;
            border: 1px solid var(--border-color);
            background:
                radial-gradient(circle at top right, rgba(99, 102, 241, 0.12), transparent 34%),
                linear-gradient(180deg, var(--surface-bg), var(--card-bg));
        }

        .auth-modal-header h2 {
            text-align: left;
            margin-bottom: 0.55rem;
        }

        .auth-modal-badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.35rem 0.8rem;
            border-radius: 999px;
            background: rgba(102, 126, 234, 0.12);
            color: var(--section-accent);
            font-size: 0.82rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }

        .auth-mode-switch {
            display: grid;
            grid-template-columns: repeat(3, minmax(0, 1fr));
            gap: 0.5rem;
            padding: 0.45rem;
            margin: 1.2rem 0;
            border-radius: 22px;
            background: var(--surface-bg);
            border: 1px solid var(--border-color);
        }

        .auth-mode-button {
            border: none;
            border-radius: 16px;
            padding: 0.85rem 1rem;
            background: transparent;
            color: var(--text-color);
            font-weight: 700;
            cursor: pointer;
            transition: transform 0.25s, background 0.25s, color 0.25s;
        }

        .auth-mode-button.active {
            background: linear-gradient(135deg, #123a78, #1f5fbf);
            color: white;
            box-shadow: 0 12px 24px rgba(28, 79, 155, 0.20);
        }

        .auth-mode-button:hover {
            transform: translateY(-1px);
        }

        .auth-form-panel-hidden {
            display: none;
        }

        .auth-form-panel {
            animation: accountSectionEnter 0.24s ease;
            padding: 0.35rem 0 0.2rem;
        }

        .auth-recover-card {
            margin: 0.4rem 0 1rem;
            padding: 1rem 1.05rem;
            border-radius: 22px;
            border: 1px solid var(--border-color);
            background:
                radial-gradient(circle at top right, rgba(59, 130, 246, 0.08), transparent 38%),
                linear-gradient(180deg, var(--surface-bg), rgba(255,255,255,0.88));
        }

        .auth-recover-card[data-state="sent"] {
            border-color: rgba(59, 130, 246, 0.24);
            box-shadow: 0 16px 30px rgba(59, 130, 246, 0.08);
        }

        .auth-recover-card[data-state="reset"] {
            border-color: rgba(16, 185, 129, 0.24);
            box-shadow: 0 16px 30px rgba(16, 185, 129, 0.08);
        }

        .auth-recover-badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 0.8rem;
            padding: 0.3rem 0.72rem;
            border-radius: 999px;
            background: rgba(59, 130, 246, 0.12);
            color: #1d4ed8;
            font-size: 0.78rem;
            font-weight: 800;
            letter-spacing: 0.04em;
            text-transform: uppercase;
        }

        .auth-recover-card[data-state="reset"] .auth-recover-badge {
            background: rgba(16, 185, 129, 0.12);
            color: #047857;
        }

        .auth-recover-card h3 {
            margin-bottom: 0.45rem;
            font-size: 1.15rem;
        }

        .auth-recover-card .profile-note {
            margin-bottom: 0;
        }

        .auth-recover-steps {
            margin: 0.8rem 0 0;
            padding-left: 1.15rem;
            color: var(--text-light);
        }

        .auth-recover-steps li + li {
            margin-top: 0.35rem;
        }

        .auth-recover-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
            justify-content: flex-end;
            margin-top: 0.95rem;
        }

        .auth-recover-action {
            min-height: auto;
            padding: 0.78rem 1rem;
        }

        .auth-recover-delivery-hint {
            margin-top: 0.85rem;
            color: var(--text-light);
        }

        .auth-support-actions {
            display: flex;
            justify-content: flex-end;
            margin-top: 0.9rem;
        }

        .auth-support-button {
            min-height: auto;
            padding: 0.78rem 1rem;
        }

        .auth-support-danger {
            border-color: rgba(239, 68, 68, 0.22);
            color: var(--text-color);
        }

        .auth-support-danger:hover {
            background: rgba(239, 68, 68, 0.08);
            color: #b91c1c;
            border-color: rgba(239, 68, 68, 0.4);
        }

        .account-modal-content {
            max-width: 1220px;
            padding: 1.5rem;
        }

        .account-shell-layout {
            display: grid;
            grid-template-columns: 300px minmax(0, 1fr);
            gap: 1.1rem;
            min-height: 76vh;
        }

        .account-sidebar {
            display: flex;
            flex-direction: column;
            gap: 1rem;
            padding: 1.35rem;
            border-radius: 28px;
            background: linear-gradient(180deg, #1e293b, #0f172a);
            color: white;
            box-shadow: 0 24px 48px rgba(15, 23, 42, 0.24);
        }

        .account-sidebar .profile-note {
            color: rgba(255,255,255,0.76);
            margin-top: 0;
        }

        .account-sidebar-top {
            border-bottom: 1px solid rgba(255,255,255,0.12);
            padding-bottom: 1rem;
        }

        .account-sidebar-avatar-wrap {
            display: flex;
            align-items: center;
            gap: 0.9rem;
            margin-bottom: 1rem;
        }

        .account-avatar {
            width: 72px;
            height: 72px;
            border-radius: 24px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, #123a78, #c89b19);
            color: white;
            font-size: 1.4rem;
            font-weight: 700;
            box-shadow: 0 16px 28px rgba(0,0,0,0.2);
        }

        .account-sidebar-status {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.35rem 0.7rem;
            border-radius: 999px;
            background: rgba(255,255,255,0.12);
            color: rgba(255,255,255,0.88);
            font-size: 0.8rem;
            font-weight: 700;
        }

        .account-theme-choice-grid {
            display: grid;
            grid-template-columns: repeat(2, minmax(0, 1fr));
            gap: 0.85rem;
        }

        .account-theme-choice {
            display: flex;
            align-items: flex-start;
            gap: 0.8rem;
            width: 100%;
            padding: 1rem;
            border-radius: 20px;
            border: 1px solid var(--border-color);
            background: linear-gradient(180deg, var(--surface-bg), var(--card-bg));
            color: var(--text-color);
            text-align: left;
            cursor: pointer;
            transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
        }

        .account-theme-choice:hover {
            transform: translateY(-2px);
            border-color: rgba(28, 79, 155, 0.26);
            box-shadow: var(--shadow-soft);
        }

        .theme-choice-light {
            background:
                radial-gradient(circle at top right, rgba(251, 191, 36, 0.22), transparent 45%),
                linear-gradient(180deg, #ffffff, #eef4ff);
        }

        .theme-choice-dark {
            background:
                radial-gradient(circle at top right, rgba(242, 201, 76, 0.14), transparent 42%),
                linear-gradient(180deg, #09162b, #0f2344);
        }

        .theme-choice-dark strong,
        .theme-choice-dark small {
            color: #e2e8f0;
        }

        .theme-choice-ocean {
            background:
                radial-gradient(circle at top right, rgba(34, 211, 238, 0.18), transparent 40%),
                linear-gradient(180deg, #083344, #0f766e);
        }

        .theme-choice-ocean strong,
        .theme-choice-ocean small {
            color: #ecfeff;
        }

        .theme-choice-sunset {
            background:
                radial-gradient(circle at top right, rgba(242, 201, 76, 0.18), transparent 42%),
                linear-gradient(180deg, #fffaf0, #f5ead0);
        }

        .account-theme-choice.active {
            border-color: rgba(28, 79, 155, 0.32);
            background: linear-gradient(135deg, rgba(28, 79, 155, 0.12), rgba(200, 155, 25, 0.08));
            box-shadow: 0 18px 34px rgba(28, 79, 155, 0.14);
        }

        .account-theme-choice.active .account-theme-choice-icon {
            background: rgba(28, 79, 155, 0.16);
            color: #123a78;
        }

        .account-theme-choice-icon {
            width: 2.5rem;
            height: 2.5rem;
            border-radius: 16px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            flex: 0 0 auto;
            background: rgba(102, 126, 234, 0.12);
            color: var(--section-accent);
            font-size: 1.15rem;
        }

        .account-theme-choice-copy {
            display: flex;
            flex-direction: column;
            gap: 0.2rem;
            min-width: 0;
        }

        .account-theme-choice-copy strong {
            color: var(--text-color);
            font-size: 0.98rem;
        }

        .account-theme-choice-copy small {
            color: var(--muted-text);
            line-height: 1.45;
        }

        .account-clear-button {
            width: 100%;
            margin-top: 0.75rem;
            border-color: rgba(239, 68, 68, 0.22);
            color: var(--text-color);
        }

        .account-clear-button:hover {
            background: rgba(239, 68, 68, 0.08);
            color: #b91c1c;
            border-color: rgba(239, 68, 68, 0.4);
        }

        .account-sidebar-name {
            margin: 0 0 0.45rem;
            text-align: left;
            color: white;
            font-size: 1.55rem;
        }

        .account-sidebar-section-label {
            color: rgba(255,255,255,0.68);
            font-size: 0.78rem;
            font-weight: 800;
            letter-spacing: 0.08em;
            text-transform: uppercase;
        }

        .account-section-nav {
            display: grid;
            gap: 0.55rem;
        }

        .account-section-button {
            width: 100%;
            text-align: left;
            padding: 0.95rem 1rem;
            border: 1px solid rgba(255,255,255,0.12);
            border-radius: 18px;
            background: rgba(255,255,255,0.05);
            color: rgba(255,255,255,0.88);
            font-weight: 700;
            line-height: 1.35;
            white-space: normal;
            cursor: pointer;
            transition: transform 0.25s, background 0.25s, color 0.25s, border-color 0.25s;
        }

        .account-section-button:hover,
        .account-section-button.active {
            transform: translateX(4px);
            background: white;
            color: #0f172a;
            border-color: white;
        }

        .account-sidebar-actions {
            margin-top: 0.35rem;
            display: grid;
            gap: 0.75rem;
        }

        .account-sidebar-action {
            width: 100%;
        }

        .account-sidebar .btn-secondary {
            border-color: rgba(255,255,255,0.22);
            color: white;
        }

        .account-sidebar .btn-secondary:hover {
            background: white;
            color: #0f172a;
        }

        .account-sidebar-danger {
            border-color: rgba(248, 113, 113, 0.4) !important;
            color: #ffe4e6 !important;
        }

        .account-sidebar-danger:hover {
            background: rgba(248, 113, 113, 0.14) !important;
            color: #fff1f2 !important;
            border-color: rgba(248, 113, 113, 0.68) !important;
        }

        .account-sidebar-danger:disabled {
            opacity: 0.56;
            cursor: not-allowed;
            background: transparent !important;
            color: rgba(255,255,255,0.6) !important;
            border-color: rgba(255,255,255,0.18) !important;
        }

        .account-main {
            min-width: 0;
        }

        .account-section-panel {
            display: none;
            gap: 1rem;
        }

        .account-section-panel.active {
            display: grid;
            animation: accountSectionEnter 0.28s ease;
        }

        .account-panel {
            padding: 1.4rem;
            border-radius: 24px;
            border: 1px solid var(--border-color);
            background: var(--card-bg);
            box-shadow: var(--shadow-soft);
        }

        .account-panel h3 {
            margin-bottom: 0.35rem;
        }

        .account-panel-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            margin-bottom: 1rem;
        }

        .account-panel-tools {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            flex-wrap: wrap;
        }

        .account-overview-grid {
            display: grid;
            grid-template-columns: repeat(4, minmax(0, 1fr));
            gap: 1rem;
        }

        .account-overview-card {
            padding: 1rem 1.1rem;
            border-radius: 22px;
            border: 1px solid var(--border-color);
            background: linear-gradient(180deg, var(--surface-bg), var(--card-bg));
            box-shadow: var(--shadow-soft);
        }

        .account-overview-label {
            margin-bottom: 0.45rem;
            color: var(--muted-text);
            font-size: 0.78rem;
            text-transform: uppercase;
            letter-spacing: 0.08em;
        }

        .account-overview-value {
            color: var(--text-color);
            font-size: 1.12rem;
            font-weight: 700;
        }

        .account-shortcut-grid {
            display: grid;
            grid-template-columns: repeat(2, minmax(0, 1fr));
            gap: 1rem;
        }

        .account-shortcut-card {
            padding: 1.2rem;
            border-radius: 22px;
            border: 1px solid var(--border-color);
            background: var(--surface-bg);
            text-align: left;
            cursor: pointer;
            transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
        }

        .account-shortcut-card:hover {
            transform: translateY(-4px);
            border-color: rgba(102, 126, 234, 0.35);
            box-shadow: var(--shadow-strong);
        }

        .account-shortcut-card.is-highlighted {
            border-color: rgba(249, 115, 22, 0.46);
            background:
                radial-gradient(circle at top right, rgba(250, 204, 21, 0.2), transparent 48%),
                var(--surface-bg);
            box-shadow: 0 18px 34px rgba(249, 115, 22, 0.16);
        }

        .account-shortcut-card.is-highlighted .account-shortcut-title {
            color: var(--accent);
        }

        .account-shortcut-title {
            display: block;
            margin-bottom: 0.45rem;
            color: var(--text-color);
            font-weight: 700;
            font-size: 1rem;
        }

        .account-shortcut-copy {
            display: block;
            color: var(--muted-text);
            line-height: 1.55;
            font-size: 0.94rem;
        }

        .account-quick-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
        }

        .account-inline-action {
            flex: 1 1 180px;
        }

        .account-inline-action.is-highlighted {
            border-color: rgba(249, 115, 22, 0.42);
            box-shadow: 0 12px 24px rgba(249, 115, 22, 0.14);
        }

        .account-mini-action {
            padding: 0.7rem 1rem;
            min-height: auto;
            font-size: 0.92rem;
            border-color: var(--border-color);
            color: var(--text-color);
        }

        .account-mini-action:hover {
            background: var(--surface-hover);
            color: var(--text-color);
        }

        .account-chip {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.35rem 0.75rem;
            border-radius: 999px;
            background: rgba(102, 126, 234, 0.12);
            color: var(--section-accent);
            font-size: 0.8rem;
            font-weight: 700;
        }

        .account-security-summary {
            padding: 1rem 1.1rem;
            margin-bottom: 1rem;
            border-radius: 18px;
            border: 1px solid var(--border-color);
            background: var(--surface-bg);
        }

        .account-security-session-card {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            padding: 1rem 1.1rem;
            margin-bottom: 1rem;
            border-radius: 22px;
            border: 1px solid rgba(248, 113, 113, 0.16);
            background: linear-gradient(135deg, rgba(255, 245, 245, 0.96), rgba(255, 250, 250, 0.98));
        }

        .account-security-session-card .profile-note {
            margin: 0.45rem 0 0;
        }

        .account-security-label {
            color: var(--muted-text);
            font-size: 0.8rem;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            margin-bottom: 0.35rem;
        }

        .account-security-value {
            color: var(--text-color);
            font-weight: 700;
        }

        .account-logout-button {
            width: 100%;
            margin-top: 1rem;
            color: var(--text-color);
            border-color: rgba(239, 68, 68, 0.22);
        }

        .account-logout-inline {
            width: auto;
            min-width: 180px;
            margin-top: 0;
            flex-shrink: 0;
        }

        .account-logout-button:hover {
            background: rgba(239, 68, 68, 0.08);
            color: #b91c1c;
            border-color: rgba(239, 68, 68, 0.4);
        }

        .updates-modal-content {
            max-width: 860px;
        }

        .updates-modal-header {
            margin-bottom: 1rem;
        }

        .updates-toolbar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
            margin-bottom: 1rem;
        }

        .updates-feed-list {
            display: flex;
            flex-direction: column;
            gap: 0.85rem;
            max-height: 70vh;
            overflow-y: auto;
        }

        .updates-feed-item {
            padding: 1rem 1.05rem;
            border-radius: 20px;
            border: 1px solid var(--border-color);
            background: linear-gradient(180deg, var(--surface-bg), var(--card-bg));
            box-shadow: var(--shadow-soft);
            transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease;
        }

        .updates-feed-item:hover {
            transform: translateY(-2px);
            border-color: rgba(102, 126, 234, 0.28);
        }

        .updates-feed-item.priority-important {
            border-color: rgba(245, 158, 11, 0.25);
            background: linear-gradient(180deg, rgba(245, 158, 11, 0.08), var(--card-bg));
        }

        .updates-feed-item.priority-pinned {
            border-color: rgba(34, 197, 94, 0.22);
            background: linear-gradient(180deg, rgba(34, 197, 94, 0.08), var(--card-bg));
        }

        .updates-feed-top {
            display: flex;
            justify-content: space-between;
            gap: 1rem;
            align-items: center;
            margin-bottom: 0.65rem;
        }

        .community-layout-grid {
            display: grid;
            grid-template-columns: minmax(0, 1.55fr) minmax(280px, 0.95fr);
            gap: 1rem;
            align-items: start;
        }

        .community-chat-shell {
            padding: 1.2rem;
            border-radius: 24px;
            border: 1px solid var(--border-color);
            background: linear-gradient(180deg, var(--surface-bg), var(--card-bg));
            box-shadow: var(--shadow-soft);
        }

        .community-message-form {
            margin-top: 1rem;
        }

        .community-chat-list,
        .community-member-list {
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
            max-height: 420px;
            overflow-y: auto;
        }

        .community-chat-item {
            padding: 0.95rem 1rem;
            border-radius: 18px;
            border: 1px solid var(--border-color);
            background: var(--card-bg);
            box-shadow: var(--shadow-soft);
            transition: transform 0.22s ease, border-color 0.22s ease;
        }

        .community-chat-item.is-own {
            border-color: rgba(102, 126, 234, 0.35);
            background: linear-gradient(135deg, rgba(102, 126, 234, 0.08), var(--card-bg));
        }

        .community-chat-item.is-system {
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.04), var(--surface-bg));
        }

        .community-chat-meta,
        .community-member-meta {
            color: var(--muted-text);
            font-size: 0.88rem;
            line-height: 1.5;
        }

        .community-chat-meta {
            margin-bottom: 0.45rem;
        }

        .community-chat-body {
            color: var(--text-color);
            line-height: 1.62;
            white-space: pre-wrap;
        }

        .community-member-item {
            display: flex;
            gap: 0.85rem;
            align-items: flex-start;
            padding: 0.95rem 1rem;
            border-radius: 20px;
            border: 1px solid var(--border-color);
            background: var(--surface-bg);
            transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease;
        }

        .community-chat-item:hover,
        .community-member-item:hover {
            transform: translateY(-2px);
            border-color: rgba(102, 126, 234, 0.28);
        }

        .community-member-item.is-current {
            border-color: rgba(102, 126, 234, 0.35);
            box-shadow: var(--shadow-soft);
        }

        .community-member-copy {
            flex: 1;
            min-width: 0;
        }

        .community-status-pill {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.42rem 0.8rem;
            border-radius: 999px;
            background: rgba(148, 163, 184, 0.16);
            color: var(--text-color);
            font-size: 0.8rem;
            font-weight: 700;
        }

        .community-status-pill.is-success {
            background: rgba(34, 197, 94, 0.12);
            color: #15803d;
        }

        .community-status-pill.is-warning {
            background: rgba(245, 158, 11, 0.14);
            color: #b45309;
        }

        .community-status-pill.is-danger {
            background: rgba(239, 68, 68, 0.12);
            color: #b91c1c;
        }

        .admin-profile-card {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

        .admin-profile-hero {
            display: flex;
            gap: 1rem;
            align-items: flex-start;
            padding: 1.15rem;
            border-radius: 24px;
            border: 1px solid var(--border-color);
            background:
                radial-gradient(circle at top right, rgba(102, 126, 234, 0.14), transparent 42%),
                linear-gradient(180deg, var(--surface-bg), var(--card-bg));
            box-shadow: var(--shadow-soft);
        }

        .admin-profile-avatar {
            width: 72px;
            height: 72px;
            border-radius: 24px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, #123a78, #c89b19);
            color: white;
            font-size: 1.35rem;
            font-weight: 700;
            box-shadow: 0 18px 30px rgba(0, 0, 0, 0.16);
            flex: 0 0 auto;
        }

        .admin-profile-copy {
            flex: 1;
            min-width: 0;
            display: flex;
            flex-direction: column;
            gap: 0.35rem;
        }

        .admin-profile-name-row {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.75rem;
        }

        .admin-profile-name-row h3 {
            margin: 0;
        }

        .admin-profile-meta {
            color: var(--muted-text);
            line-height: 1.52;
            overflow-wrap: anywhere;
        }

        .admin-profile-highlights {
            display: grid;
            grid-template-columns: repeat(3, minmax(0, 1fr));
            gap: 0.85rem;
        }

        .admin-session-controls,
        .admin-danger-zone {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 1rem;
            padding: 1.05rem 1.1rem;
            border-radius: 22px;
            border: 1px solid var(--border-color);
            background: linear-gradient(180deg, var(--surface-bg), var(--card-bg));
            box-shadow: var(--shadow-soft);
        }

        .admin-danger-zone {
            border-color: rgba(239, 68, 68, 0.18);
            background:
                radial-gradient(circle at top right, rgba(239, 68, 68, 0.1), transparent 34%),
                linear-gradient(180deg, var(--surface-bg), var(--card-bg));
        }

        .admin-danger-zone h4,
        .admin-session-controls h3 {
            margin-bottom: 0.35rem;
            color: var(--text-color);
        }

        .admin-profile-highlight {
            padding: 1rem 1.05rem;
            border-radius: 20px;
            border: 1px solid var(--border-color);
            background: var(--surface-bg);
            box-shadow: var(--shadow-soft);
        }

        .admin-profile-highlight span {
            display: block;
            margin-bottom: 0.4rem;
            color: var(--muted-text);
            font-size: 0.78rem;
            text-transform: uppercase;
            letter-spacing: 0.08em;
        }

        .admin-profile-highlight strong {
            color: var(--text-color);
            font-size: 1rem;
            line-height: 1.45;
            overflow-wrap: anywhere;
        }

        .admin-security-panel,
        .admin-profile-directory {
            padding-top: 0.4rem;
            border-top: 1px solid var(--border-color);
        }

        .admin-security-panel {
            display: grid;
            gap: 1rem;
        }

        .admin-security-header {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 1rem;
        }

        .admin-security-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
        }

        .admin-permission-grid {
            display: grid;
            grid-template-columns: repeat(2, minmax(0, 1fr));
            gap: 0.8rem;
        }

        .admin-permission-option {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            padding: 0.9rem 1rem;
            border-radius: 18px;
            border: 1px solid var(--border-color);
            background: var(--surface-bg);
            color: var(--text-color);
            font-weight: 600;
            line-height: 1.45;
        }

        .admin-permission-option input {
            accent-color: var(--section-accent);
            width: 1rem;
            height: 1rem;
            flex: 0 0 auto;
        }

        .admin-preset-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
            gap: 0.75rem;
        }

        .admin-preset-button {
            width: 100%;
            margin-top: 0;
            min-height: 56px;
            white-space: normal;
            line-height: 1.35;
        }

        .admin-timer-settings-card,
        .admin-timer-tools-card {
            grid-column: 1 / -1;
        }

        .admin-timer-tools-layout {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1rem;
        }

        .admin-timer-section {
            display: grid;
            padding: 1rem 1.05rem;
            border-radius: 22px;
            border: 1px solid rgba(148, 163, 184, 0.16);
            background: linear-gradient(180deg, rgba(15, 23, 42, 0.3), rgba(15, 23, 42, 0.12));
            box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03);
            min-width: 0;
            gap: 1rem;
        }

        .admin-timer-section-head {
            display: grid;
            gap: 0.35rem;
        }

        .admin-timer-section-head h4 {
            margin: 0;
            color: var(--text-color);
            font-size: 1rem;
        }

        .admin-timer-section-head p {
            margin: 0;
            color: var(--muted-text);
            line-height: 1.5;
        }

        .admin-timer-control-grid {
            align-items: stretch;
        }

        .admin-timer-summary-grid {
            display: grid;
            grid-template-columns: repeat(2, minmax(0, 1fr));
            gap: 0.8rem;
        }

        .admin-timer-kpi {
            padding: 1rem 1.05rem;
            border-radius: 20px;
            border: 1px solid var(--border-color);
            background: linear-gradient(180deg, var(--surface-bg), var(--card-bg));
            box-shadow: var(--shadow-soft);
            min-width: 0;
        }

        .admin-timer-kpi span {
            display: block;
            margin-bottom: 0.45rem;
            color: var(--muted-text);
            font-size: 0.78rem;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            line-height: 1.45;
        }

        .admin-timer-kpi strong {
            color: var(--text-color);
            font-size: 1.18rem;
            line-height: 1.35;
        }

        .admin-timer-note {
            margin: 0;
        }

        .admin-community-log-wrap h4 {
            margin: 0 0 0.75rem;
            color: var(--text-color);
        }

        .reveal-on-scroll {
            opacity: 0;
            transform: translateY(26px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }

        .reveal-on-scroll.is-visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* Quiz Interface */
        .quiz-container {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: var(--quiz-overlay);
            z-index: 3000;
            justify-content: center;
            align-items: center;
        }

        .quiz-content {
            background: var(--card-bg);
            padding: 3rem;
            border-radius: 20px;
            max-width: 800px;
            width: 90%;
            max-height: 90vh;
            overflow-y: auto;
            color: var(--text-color);
        }

        .quiz-header {
            margin-bottom: 1.5rem;
        }

        .quiz-heading-row {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            gap: 1rem;
        }

        .quiz-title-group h2 {
            margin-bottom: 0.75rem;
        }

        .quiz-meta-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 0.7rem;
        }

        .quiz-meta-badge,
        .quiz-timer-pill {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.7rem 1rem;
            border-radius: 999px;
            background: var(--surface-bg);
            border: 1px solid var(--border-color);
            color: var(--text-color);
            font-weight: bold;
        }

        .quiz-timer-pill {
            min-width: 92px;
            color: var(--section-accent);
        }

        .quiz-timer-pill.is-warning {
            color: #b45309;
            border-color: rgba(245, 158, 11, 0.28);
            background: linear-gradient(135deg, rgba(245, 158, 11, 0.16), var(--surface-bg));
        }

        .quiz-timer-pill.is-danger {
            color: #b91c1c;
            border-color: rgba(239, 68, 68, 0.3);
            background: linear-gradient(135deg, rgba(239, 68, 68, 0.18), var(--surface-bg));
            animation: pulseBadge 0.85s ease-in-out infinite;
        }

        .quiz-status-bar {
            display: grid;
            grid-template-columns: repeat(4, minmax(0, 1fr));
            gap: 0.9rem;
            margin: 1.4rem 0 1rem;
        }

        .quiz-status-pill {
            padding: 1rem;
            border-radius: 18px;
            background: var(--surface-bg);
            border: 1px solid var(--border-color);
        }

        .quiz-status-label {
            font-size: 0.75rem;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--muted-text);
            margin-bottom: 0.35rem;
        }

        .quiz-status-value {
            font-size: 1.05rem;
            font-weight: bold;
            color: var(--text-color);
        }

        .progress-meta {
            display: flex;
            justify-content: space-between;
            gap: 1rem;
            color: var(--muted-text);
            font-size: 0.95rem;
            margin-bottom: 0.75rem;
        }

        .progress-bar {
            background: var(--border-color);
            height: 8px;
            border-radius: 4px;
            margin-bottom: 2rem;
            overflow: hidden;
        }

        .progress-fill {
            background: linear-gradient(90deg, #123a78, #c89b19);
            height: 100%;
            width: 0%;
            transition: width 0.3s;
        }

        .question {
            font-size: 1.3rem;
            margin-bottom: 2rem;
            line-height: 1.5;
        }

        .quiz-help-text {
            margin: 1rem 0 0;
            color: var(--muted-text);
            font-size: 0.98rem;
        }

        .options {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

        .option {
            padding: 1rem;
            border: 2px solid var(--border-color);
            border-radius: 10px;
            cursor: pointer;
            transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease;
            background: var(--card-bg);
            color: var(--text-color);
            user-select: none;
            line-height: 1.55;
        }

        .option:not(.is-locked):hover {
            border-color: #1c4f9b;
            background: var(--surface-bg);
            transform: translateY(-1px);
        }

        .option:focus,
        .option:focus-visible {
            outline: none;
            border-color: rgba(28, 79, 155, 0.64);
            box-shadow: 0 0 0 3px rgba(28, 79, 155, 0.14);
        }

        .option.is-locked {
            cursor: default;
        }

        .option.is-locked:focus,
        .option.is-locked:focus-visible {
            box-shadow: none;
        }

        .option.is-correct {
            background: linear-gradient(135deg, #16a34a, #15803d);
            color: white;
            border-color: #15803d;
            box-shadow: 0 16px 28px rgba(21, 128, 61, 0.2);
        }

        .option.is-wrong {
            background: linear-gradient(135deg, #ef4444, #dc2626);
            color: white;
            border-color: #dc2626;
            box-shadow: 0 16px 28px rgba(220, 38, 38, 0.16);
        }

        .option.is-muted {
            opacity: 0.72;
        }

        .option.is-correct,
        .option.is-wrong,
        .option.is-muted {
            transform: none;
        }

        .quiz-controls {
            display: flex;
            justify-content: space-between;
            margin-top: 2rem;
        }

        .result-message {
            margin-top: 0.75rem;
            color: var(--muted-text);
            line-height: 1.6;
        }

        .result-recommendation {
            margin-top: 1rem;
            padding: 1rem 1.1rem;
            border-radius: 16px;
            background: var(--surface-bg);
            border: 1px solid var(--border-color);
            color: var(--text-color);
        }

        .result-summary-grid {
            display: grid;
            grid-template-columns: repeat(2, minmax(0, 1fr));
            gap: 1rem;
            margin: 1.5rem 0;
        }

        .result-summary-card {
            padding: 1rem 1.1rem;
            border-radius: 18px;
            background: var(--surface-bg);
            border: 1px solid var(--border-color);
        }

        .result-summary-label {
            color: var(--muted-text);
            font-size: 0.86rem;
            margin-bottom: 0.35rem;
        }

        .result-summary-value {
            color: var(--section-accent);
            font-size: 1.25rem;
            font-weight: bold;
            line-height: 1.25;
        }

        .result-actions {
            display: flex;
            flex-wrap: wrap;
            justify-content: flex-end;
            gap: 1rem;
            margin-top: 1.5rem;
        }

        .back-to-top {
            position: fixed;
            right: 1.5rem;
            bottom: 1.5rem;
            z-index: 1600;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 54px;
            min-height: 54px;
            border: none;
            border-radius: 50%;
            background: var(--section-accent);
            color: white;
            font-weight: bold;
            font-size: 1.15rem;
            padding: 0.85rem;
            box-shadow: var(--shadow-soft);
            cursor: pointer;
            opacity: 0;
            pointer-events: none;
            transform: translateY(12px);
            transition: opacity 0.3s ease, transform 0.3s ease;
        }

        .back-to-top.visible {
            opacity: 1;
            pointer-events: auto;
            transform: translateY(0);
        }

        .toast-stack {
            position: fixed;
            top: calc(var(--header-offset) + 1rem);
            right: 1.25rem;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
            width: min(360px, calc(100vw - 2rem));
            z-index: 4500;
            pointer-events: none;
        }

        .toast {
            padding: 0.95rem 1rem;
            border-radius: 16px;
            border: 1px solid var(--border-color);
            background: var(--card-bg);
            color: var(--text-color);
            box-shadow: var(--shadow-soft);
            opacity: 0;
            transform: translateY(-8px) scale(0.98);
            transition: opacity 0.24s ease, transform 0.24s ease;
        }

        .toast.visible {
            opacity: 1;
            transform: translateY(0) scale(1);
        }

        .toast-success {
            border-color: rgba(34, 197, 94, 0.25);
            background: linear-gradient(135deg, rgba(34, 197, 94, 0.12), var(--card-bg));
        }

        .toast-error {
            border-color: rgba(220, 38, 38, 0.25);
            background: linear-gradient(135deg, rgba(220, 38, 38, 0.12), var(--card-bg));
        }

        .toast-info {
            border-color: rgba(99, 102, 241, 0.25);
            background: linear-gradient(135deg, rgba(99, 102, 241, 0.12), var(--card-bg));
        }

        .confirm-modal-content {
            max-width: 460px;
        }

        .confirm-message {
            margin-top: 1rem;
            color: var(--muted-text);
            line-height: 1.6;
        }

        .confirm-actions {
            display: flex;
            justify-content: flex-end;
            flex-wrap: wrap;
            gap: 0.9rem;
            margin-top: 1.5rem;
        }

        .confirm-action-btn.is-danger {
            background: #dc2626;
        }

        .confirm-action-btn.is-danger:hover {
            background: #b91c1c;
        }

        .modal.modal-elevated {
            z-index: 2400;
        }

        .admin-danger-modal-content {
            max-width: 720px;
        }

        .admin-danger-header {
            margin-bottom: 1rem;
            padding: 1rem 1.05rem;
            border-radius: 22px;
            border: 1px solid var(--border-color);
            background:
                radial-gradient(circle at top right, rgba(239, 68, 68, 0.1), transparent 34%),
                linear-gradient(180deg, var(--surface-bg), var(--card-bg));
        }

        .admin-danger-summary {
            display: grid;
            grid-template-columns: repeat(2, minmax(0, 1fr));
            gap: 0.9rem;
            margin-bottom: 1rem;
        }

        .admin-danger-card {
            padding: 1rem;
            border-radius: 20px;
            border: 1px solid var(--border-color);
            background: var(--surface-bg);
        }

        .admin-danger-label {
            margin-bottom: 0.35rem;
            font-size: 0.8rem;
            font-weight: 800;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: var(--text-light);
        }

        #adminDangerOwnerEmail.is-warning {
            color: #b45309;
        }

        .admin-danger-code-row {
            display: grid;
            grid-template-columns: minmax(0, 1fr) auto;
            gap: 0.9rem;
            align-items: end;
        }

        .admin-danger-scope-card {
            margin-bottom: 1rem;
            padding: 1rem 1.05rem;
            border-radius: 18px;
            border: 1px solid var(--border-color);
            background: var(--surface-bg);
            display: grid;
            gap: 0.8rem;
        }

        .admin-danger-scope-options {
            display: grid;
            gap: 0.75rem;
        }

        .admin-danger-scope-option {
            display: grid;
            grid-template-columns: auto minmax(0, 1fr);
            gap: 0.8rem;
            align-items: start;
            padding: 0.95rem 1rem;
            border-radius: 16px;
            border: 1px solid rgba(59, 130, 246, 0.14);
            background: rgba(59, 130, 246, 0.04);
            cursor: pointer;
            transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
        }

        .admin-danger-scope-option:hover {
            border-color: rgba(59, 130, 246, 0.26);
            background: rgba(59, 130, 246, 0.08);
            transform: translateY(-1px);
        }

        .admin-danger-scope-option input {
            margin-top: 0.2rem;
        }

        .admin-danger-scope-option span {
            display: grid;
            gap: 0.28rem;
        }

        .admin-danger-scope-option strong {
            font-size: 0.98rem;
        }

        .admin-danger-scope-option small {
            color: var(--text-light);
            line-height: 1.45;
        }

        .admin-danger-approval-card {
            min-height: 100%;
            padding: 1rem 1.05rem;
            border-radius: 18px;
            border: 1px solid var(--border-color);
            background: var(--surface-bg);
            display: grid;
            gap: 0.45rem;
        }

        .admin-danger-send-button {
            min-height: 56px;
            white-space: nowrap;
        }

        @media (max-width: 700px) {
            .admin-danger-summary,
            .admin-danger-code-row {
                grid-template-columns: 1fr;
            }

            .admin-danger-send-button {
                width: 100%;
            }
        }

        /* Animations */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }

        @keyframes slideIn {
            from {
                opacity: 0;
                transform: translateY(-50px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes spin {
            from {
                transform: rotate(0deg);
            }
            to {
                transform: rotate(360deg);
            }
        }

        @keyframes accountSectionEnter {
            from {
                opacity: 0;
                transform: translateY(12px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes pulseBadge {
            0%, 100% {
                transform: scale(1);
            }
            50% {
                transform: scale(1.08);
            }
        }

        @media (prefers-reduced-motion: reduce) {
            * {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
                scroll-behavior: auto !important;
            }
        }

        body.dark-mode {
            --bg-color: #081425;
            --text-color: #edf4ff;
            --muted-text: #9fb3d1;
            --card-bg: #10203a;
            --surface-bg: #091423;
            --surface-hover: #122744;
            --border-color: #29456e;
            --header-gradient: linear-gradient(135deg, #081425 0%, #123a78 58%, #c89b19 100%);
            --accent: #d7ad37;
            --accent-hover: #bf9524;
            --section-accent: #7db0ff;
            --footer-bg: #040d1d;
            --footer-link: #d7e5fb;
            --modal-overlay: rgba(2,6,23,0.85);
            --quiz-overlay: rgba(2,6,23,0.92);
            --shadow-soft: 0 14px 34px rgba(0,0,0,0.35);
            --shadow-strong: 0 24px 48px rgba(0,0,0,0.45);
            --input-bg: #0c1b31;
        }

        body.dark-mode .leaderboard-table thead,
        body.dark-mode header {
            box-shadow: 0 8px 24px rgba(0,0,0,0.3);
        }

        body.dark-mode .quiz-content .btn-secondary {
            color: var(--text-color);
            border-color: var(--border-color);
        }

        body.dark-mode .quiz-content .btn-secondary:hover {
            background: var(--surface-hover);
            color: var(--text-color);
        }

        body[data-theme="ocean"] {
            --bg-color: #f0fbff;
            --text-color: #0f172a;
            --muted-text: #0f766e;
            --card-bg: #ffffff;
            --surface-bg: #eefbff;
            --surface-hover: #def7ff;
            --border-color: #c6edf8;
            --header-gradient: linear-gradient(135deg, #0f766e 0%, #155e75 55%, #082f49 100%);
            --accent: #0284c7;
            --accent-hover: #0369a1;
            --section-accent: #0f766e;
            --footer-bg: #082f49;
            --footer-link: #d9f6ff;
            --modal-overlay: rgba(8,47,73,0.72);
            --quiz-overlay: rgba(8,47,73,0.84);
            --shadow-soft: 0 14px 34px rgba(8,47,73,0.12);
            --shadow-strong: 0 24px 48px rgba(8,47,73,0.18);
            --input-bg: #ffffff;
        }

        body[data-theme="ocean"] .account-sidebar {
            background: linear-gradient(180deg, #0f766e, #082f49);
        }

        body[data-theme="ocean"] .admin-sidebar {
            background:
                radial-gradient(circle at top right, rgba(34, 211, 238, 0.2), transparent 34%),
                linear-gradient(180deg, #0f766e, #082f49);
        }

        body[data-theme="ocean"] .progress-fill {
            background: linear-gradient(90deg, #0f766e, #0284c7);
        }

        body[data-theme="sunset"] {
            --bg-color: #fff7ed;
            --text-color: #4a1d0b;
            --muted-text: #9a3412;
            --card-bg: #fffdf8;
            --surface-bg: #fff1eb;
            --surface-hover: #ffe5d4;
            --border-color: #fed7aa;
            --header-gradient: linear-gradient(135deg, #f97316 0%, #fb7185 58%, #7c3aed 100%);
            --accent: #ef4444;
            --accent-hover: #dc2626;
            --section-accent: #ea580c;
            --footer-bg: #431407;
            --footer-link: #fed7aa;
            --modal-overlay: rgba(120,53,15,0.56);
            --quiz-overlay: rgba(67,20,7,0.76);
            --shadow-soft: 0 14px 34px rgba(120,53,15,0.12);
            --shadow-strong: 0 24px 48px rgba(120,53,15,0.18);
            --input-bg: #fffaf6;
        }

        body[data-theme="sunset"] .account-sidebar {
            background: linear-gradient(180deg, #7c2d12, #431407);
        }

        body[data-theme="sunset"] .admin-sidebar {
            background:
                radial-gradient(circle at top right, rgba(251, 191, 36, 0.18), transparent 35%),
                linear-gradient(180deg, #7c2d12, #431407);
        }

        body[data-theme="sunset"] .progress-fill {
            background: linear-gradient(90deg, #f97316, #fb7185);
        }

        /* Responsive */
        @media (max-width: 768px) {
            :root {
                --header-offset: 92px;
            }

            .nav-links {
                display: none;
            }

            .nav-menu-toggle {
                display: inline-flex;
                order: 3;
            }

            .nav-actions {
                gap: 0.5rem;
                margin-left: auto;
            }

            .theme-toggle,
            .signup-btn,
            .admin-access-button,
            .updates-access-button,
            .account-access-button,
            .btn-primary,
            .btn-secondary,
            .quiz-level,
            .view-history-btn,
            .option {
                padding: 0.7rem 1rem;
                font-size: 0.9rem;
                min-height: 48px;
            }

            .hero-content h1 {
                font-size: 2.5rem;
            }

            .cta-buttons {
                flex-direction: column;
                align-items: center;
            }

            .hero-stats {
                grid-template-columns: repeat(2, minmax(0, 1fr));
            }

            .quiz-content {
                padding: 2rem 1rem;
            }

            nav {
                padding: 0 1rem;
                gap: 0.75rem;
                flex-wrap: wrap;
            }

            .logo {
                font-size: 1.35rem;
            }

            .nav-mobile-panel {
                display: block;
                width: 100%;
                padding: 0 1rem 1rem;
            }

            .nav-mobile-shell {
                border-radius: 24px;
                border: 1px solid rgba(255,255,255,0.12);
                background: rgba(15, 23, 42, 0.86);
                box-shadow: 0 22px 48px rgba(15, 23, 42, 0.3);
            }

            .toast-stack {
                left: 1rem;
                right: 1rem;
                width: auto;
            }

            .quizzes-grid {
                grid-template-columns: 1fr;
            }

            .about-layout {
                grid-template-columns: 1fr;
            }

            .community-layout {
                grid-template-columns: 1fr;
            }

            .account-access-text {
                display: none;
            }

            .updates-access-text {
                display: none;
            }

            .updates-toolbar {
                flex-direction: column;
                align-items: stretch;
            }

            .entry-portal {
                padding: 1rem;
            }

            .entry-portal-shell {
                grid-template-columns: 1fr;
                padding: 1rem;
                min-height: auto;
                max-height: calc(100vh - 2rem);
                overflow-y: auto;
            }

            .entry-portal-hero,
            .entry-portal-card,
            .auth-modal-content {
                padding: 1rem;
            }

            .entry-portal-stat-grid {
                grid-template-columns: repeat(2, minmax(0, 1fr));
            }

            .leaderboard-filter-grid {
                grid-template-columns: 1fr;
            }

            .account-access-button,
            .updates-access-button,
            .admin-access-button {
                padding-right: 0.55rem;
            }

            .admin-panel-dock {
                right: 1rem;
                left: 1rem;
                bottom: 1rem;
                min-width: 0;
            }

            .admin-access-meta {
                display: none;
            }

            .account-shell-layout,
            .admin-shell-layout,
            .account-overview-grid,
            .account-shortcut-grid,
            .admin-catalog-preview-grid,
            .account-theme-choice-grid,
            .admin-summary-grid,
            .community-layout-grid,
            .admin-profile-highlights,
            .admin-permission-grid,
            .admin-preset-grid,
            .admin-timer-summary-grid {
                grid-template-columns: 1fr;
            }

            .admin-timer-tools-layout {
                grid-template-columns: 1fr;
            }

            .account-panel-header,
            .account-panel-tools,
            .account-sidebar-avatar-wrap,
            .entry-option-head,
            .updates-feed-top,
            .account-security-session-card,
            .admin-session-banner,
            .admin-reason-profile,
            .admin-list-avatar-row,
            .admin-panel-intro,
            .admin-profile-hero,
            .admin-session-controls,
            .admin-danger-zone,
            .community-member-item {
                flex-direction: column;
                align-items: flex-start;
            }

            .account-quick-actions {
                flex-direction: column;
            }

            .quiz-gate-actions {
                flex-direction: column;
            }

            .account-logout-inline {
                width: 100%;
            }

            .auth-mode-switch,
            .admin-form-actions {
                grid-template-columns: 1fr;
            }

            .admin-form-actions {
                display: grid;
            }

            .about-stats-grid {
                grid-template-columns: 1fr 1fr;
            }

            .community-stats-grid {
                grid-template-columns: 1fr;
            }

            .quiz-heading-row,
            .progress-meta,
            .result-actions {
                flex-direction: column;
                align-items: stretch;
            }

            .quiz-status-bar,
            .result-summary-grid {
                grid-template-columns: 1fr 1fr;
            }

            .admin-grid,
            .admin-inline-grid {
                grid-template-columns: 1fr;
            }

            .admin-security-actions {
                flex-direction: column;
            }

            .back-to-top {
                right: 1rem;
                bottom: 1rem;
            }
        }