:root {
    /* --- Design Tokens alignés sur preview_color.html --- */
    --bg-color: #f0f2f8;
    --bg-white: #ffffff;
    --card-bg: #ffffff;
    --card-shadow: 0 1px 3px rgba(0,0,0,.04), 0 4px 16px rgba(0,0,0,.04);

    --primary-color: #3b35e8;
    --primary-light: #5b56f0;
    --primary-bg: #f5f4ff;
    --secondary-color: #3b35e8;
    --accent-color: #3b35e8;

    --text-main: #0f0e1a;
    --text-secondary: #4b5563;
    --text-muted: #9ca3af;

    --glass-border: #e8eaf0;
    --glass-border-soft: #e8eaf0;

    --font-heading: 'Space Grotesk', sans-serif;
    --font-body: 'Outfit', sans-serif;

    --success: #16a34a;
    --success-bg: #f0fdf4;
    --error: #dc2626;
    --error-bg: #fef2f2;

    /* --- App Specific Extensions --- */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
}

/* --- DARK THEME --- */
[data-theme="dark"] {
    --bg-color: #0f0f14;
    --bg-white: #1a1a24;
    --card-bg: #1a1a24;
    --card-shadow: 0 1px 3px rgba(0,0,0,.2), 0 4px 16px rgba(0,0,0,.15);

    --primary-color: #6366f1;
    --primary-light: #818cf8;
    --primary-bg: rgba(99,102,241,.12);
    --secondary-color: #6366f1;
    --accent-color: #818cf8;

    --text-main: #f1f1f5;
    --text-secondary: #a1a1b5;
    --text-muted: #6b6b80;

    --glass-border: #2a2a3a;
    --glass-border-soft: #232333;

    --success: #22c55e;
    --success-bg: rgba(34,197,94,.1);
    --error: #ef4444;
    --error-bg: rgba(239,68,68,.1);

    color-scheme: dark;
}

[data-theme="dark"] body {
    background-color: var(--bg-color);
    color: var(--text-main);
}

[data-theme="dark"] .sidebar {
    background: #14141e;
    border-right-color: var(--glass-border);
}

[data-theme="dark"] .nav-item:hover {
    background: rgba(255,255,255,.05);
}

[data-theme="dark"] .nav-item.active {
    background: var(--primary-bg);
    color: var(--primary-light);
}

[data-theme="dark"] .sidebar-logo-icon {
    background: var(--primary-color);
    color: #fff;
}

[data-theme="dark"] select {
    color-scheme: dark;
}

[data-theme="dark"] select option {
    background-color: #1a1a24;
    color: var(--text-main);
}

[data-theme="dark"] input,
[data-theme="dark"] textarea {
    background: #1e1e2e;
    border-color: var(--glass-border);
    color: var(--text-main);
}

[data-theme="dark"] input:focus,
[data-theme="dark"] textarea:focus {
    background: #242438;
    border-color: var(--primary-color);
}

[data-theme="dark"] ::-webkit-scrollbar-track {
    background: var(--bg-color);
}

[data-theme="dark"] ::-webkit-scrollbar-thumb {
    background: #3a3a4e;
    border-color: var(--bg-color);
}

[data-theme="dark"] ::-webkit-scrollbar-thumb:hover {
    background: #4a4a60;
}

/* Dark: login / auth pages */
[data-theme="dark"] .login-wrapper {
    background: var(--bg-color);
}

[data-theme="dark"] .login-card {
    background: var(--card-bg);
    border-color: var(--glass-border);
    box-shadow: var(--card-shadow);
}

[data-theme="dark"] .login-card input {
    background: #1e1e2e;
    border-color: var(--glass-border);
    color: var(--text-main);
}

[data-theme="dark"] .login-card input:focus {
    background: #242438;
    border-color: var(--primary-color);
}

/* Dark: main content area */
[data-theme="dark"] .main-content {
    background: var(--bg-color);
}

/* Dark: stat cards & glass panels */
[data-theme="dark"] .stat-card,
[data-theme="dark"] .glass-panel,
[data-theme="dark"] .glass {
    background: var(--card-bg);
    border-color: var(--glass-border);
    box-shadow: var(--card-shadow);
}

/* Dark: TOEIC exam cards */
[data-theme="dark"] .toeic-card {
    background: var(--card-bg);
    border-color: var(--glass-border);
}

[data-theme="dark"] .toeic-card:hover {
    border-color: var(--primary-color);
}

/* Dark: buttons */
[data-theme="dark"] .btn-secondary,
[data-theme="dark"] .toeic-start-btn {
    background: var(--primary-bg);
    color: var(--primary-light);
    border-color: transparent;
}

[data-theme="dark"] .btn-secondary:hover,
[data-theme="dark"] .toeic-start-btn:hover {
    background: rgba(99,102,241,.2);
}

/* Dark: exam view */
[data-theme="dark"] .exam-header {
    background: var(--card-bg);
    border-color: var(--glass-border);
}

[data-theme="dark"] .question-card {
    background: var(--card-bg);
    border-color: var(--glass-border);
}

[data-theme="dark"] .option-btn {
    background: #1e1e2e;
    border-color: var(--glass-border);
    color: var(--text-main);
}

[data-theme="dark"] .option-btn:hover {
    background: #242438;
    border-color: var(--primary-color);
}

/* Dark: nav section labels */
[data-theme="dark"] .nav-section-label {
    color: var(--text-muted);
}

/* Dark: sidebar footer */
[data-theme="dark"] .sidebar-footer {
    border-top-color: var(--glass-border);
}

/* --- RESET & BASE --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: var(--font-body);
    overflow-x: hidden;
    line-height: 1.6;
    min-height: 100vh;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-color);
}

::-webkit-scrollbar-thumb {
    background: #c4c7d4;
    border-radius: 5px;
    border: 2px solid var(--bg-color);
}

::-webkit-scrollbar-thumb:hover {
    background: #9ca3af;
}

/* --- GLOBAL FORM STYLES --- */
select {
    color-scheme: light;
}

select option {
    background-color: var(--card-bg);
    color: var(--text-main);
    padding: 10px;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s;
}

ul {
    list-style: none;
}

/* --- TYPOGRAPHY --- */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-main);
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* --- UTILITIES --- */
.glass {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    box-shadow: var(--card-shadow);
}

.glass-panel {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    box-shadow: var(--card-shadow);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
}

/* --- BUTTONS --- */
.cta-button,
.start-btn,
.btn-primary,
button.tab-btn,
.btn-submit {
    padding: 12px 24px;
    border-radius: 999px;
    /* Pill shape as per context */
    text-decoration: none;
    font-weight: 600;
    font-family: var(--font-body);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    border: none;
    cursor: pointer;
    font-size: 0.95rem;
}

/* Primary Variant */
.cta-button.primary,
.start-btn,
.btn-primary,
.btn-submit {
    background: var(--primary-color);
    color: white;
    box-shadow: 0 4px 12px rgba(59, 53, 232, 0.2);
}

.cta-button.primary:hover,
.start-btn:hover,
.btn-primary:hover,
.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(59, 53, 232, 0.3);
}

/* Secondary Variant */
.cta-button.secondary,
.btn-secondary {
    border: 1px solid var(--glass-border);
    color: var(--primary-color);
    background: var(--primary-bg);
}

.cta-button.secondary:hover,
.btn-secondary:hover {
    background: #ede9ff;
    border-color: var(--primary-color);
}

/* Small Variant */
.cta-button.small {
    padding: 8px 20px;
    font-size: 0.85rem;
}

/* Danger Variant */
.btn-danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--error);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.btn-danger:hover {
    background: rgba(239, 68, 68, 0.2);
    border-color: var(--error);
}

/* Disabled State */
button:disabled,
.start-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
    background: #e8eaf0;
    color: var(--text-muted);
}

/* --- FORMS & INPUTS --- */
input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
select,
textarea {
    width: 100%;
    padding: 12px 16px;
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    color: var(--text-main);
    font-family: var(--font-body);
    font-size: 0.95rem;
    transition: all 0.2s ease;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 53, 232, 0.1);
    background: var(--card-bg);
}

label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
}

/* --- LOGIN / AUTH PAGES --- */
.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    position: relative;
    overflow: hidden;
    background: var(--bg-color);
}

.login-card {
    width: 100%;
    max-width: 440px;
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
    position: relative;
    z-index: 10;
}

/* --- SIDEBAR APP LAYOUT --- */
.app-layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 240px;
    min-width: 240px;
    background: var(--card-bg);
    border-right: 1px solid var(--glass-border);
    display: flex;
    flex-direction: column;
    padding: 24px 0 0;
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0 20px 28px;
}

.sidebar-logo-icon {
    width: 36px;
    height: 36px;
    background: var(--primary-color);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1rem;
    color: white;
    font-family: var(--font-heading);
    flex-shrink: 0;
}

.sidebar-logo-text {
    font-weight: 700;
    font-size: 1.1rem;
    font-family: var(--font-heading);
    color: var(--text-main);
}

.sidebar-nav {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 0 12px;
}

.nav-section-label {
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    text-transform: uppercase;
    padding: 16px 8px 6px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 11px;
    padding: 10px 12px;
    border-radius: 10px;
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    transition: background 0.15s, color 0.15s;
    cursor: pointer;
    margin-bottom: 2px;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
    font-family: var(--font-body);
}

.nav-item:hover {
    background: var(--primary-bg);
    color: var(--text-main);
}

.nav-item.active {
    background: var(--primary-bg);
    color: var(--text-main);
}

.nav-item.active i {
    color: var(--primary-color);
}

.nav-item i {
    width: 18px;
    text-align: center;
    flex-shrink: 0;
}

.nav-badge {
    margin-left: auto;
    background: var(--primary-color);
    color: white;
    font-size: 0.65rem;
    font-weight: 700;
    padding: 2px 7px;
    border-radius: 999px;
    line-height: 1.6;
}

.nav-badge-locked {
    background: #e8eaf0;
    color: var(--text-muted);
}

/* Nav submenu (accordion) */
.nav-group-toggle { cursor: pointer; user-select: none; }
.nav-chevron { margin-left: auto; font-size: .65rem; transition: transform .25s; }
.nav-group.open .nav-chevron { transform: rotate(90deg); }
.nav-sub { max-height: 0; overflow: hidden; transition: max-height .28s ease; }
.nav-group.open .nav-sub { max-height: 200px; }
.nav-sub-item { padding-left: 40px !important; font-size: .83rem !important; }

.sidebar-footer {
    padding: 12px;
    border-top: 1px solid var(--glass-border);
    margin-top: 8px;
}

.nav-logout:hover {
    background: rgba(239, 68, 68, 0.1) !important;
    color: var(--error) !important;
}

/* Main content area */
.main-content {
    flex: 1;
    padding: 40px;
    overflow-y: auto;
    min-width: 0;
    animation: fadeIn 0.4s ease-out;
    background: transparent;
}
.main-content:has(.hero) {
    padding: 0;
}

.content-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 40px;
}

.header-actions {
    display: flex;
    gap: 8px;
}

.filter-btn {
    padding: 8px 20px;
    border-radius: 999px;
    border: 1px solid var(--glass-border);
    background: transparent;
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    font-family: var(--font-body);
    transition: all 0.2s;
}

.filter-btn.active,
.filter-btn:hover {
    background: var(--primary-bg);
    color: var(--primary-color);
    border-color: var(--primary-color);
}

/* --- DASHBOARD LAYOUT (legacy, kept for admin) --- */
.dashboard-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 40px 24px;
    animation: fadeIn 0.6s ease-out;
}

.header-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 48px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--glass-border);
    flex-wrap: wrap;
    gap: 20px;
}

.user-welcome-box {
    display: flex;
    align-items: center;
    gap: 16px;
}

.user-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
    color: white;
    box-shadow: 0 2px 8px rgba(59, 53, 232, 0.2);
}

/* ── Hero (preview_color) ── */
.hero {
    padding: 40px 48px 28px;
    border-bottom: 1px solid var(--glass-border);
}
.hero-eyebrow {
    font-size: .7rem;
    font-weight: 600;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: #3b35e8;
    margin-bottom: 10px;
}
.hero-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 2.4rem;
    font-weight: 300;
    color: var(--text-main);
    letter-spacing: -.04em;
    line-height: 1.1;
}
.hero-title strong { font-weight: 800; }
.hero-sub { font-size: .9rem; color: var(--text-muted); margin-top: 8px; }

/* ── Content grid (preview_color) ── */
.content-grid {
    padding: 24px 48px 32px;
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 16px;
    align-items: start;
}

/* ── Stat cards (preview_color) ── */
.stat-card {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 20px 22px;
    box-shadow: 0 1px 3px rgba(0,0,0,.04), 0 4px 16px rgba(0,0,0,.04);
}
.stat-label {
    font-size: .7rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: .06em;
    margin-bottom: 8px;
}
.stat-val {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-main);
    line-height: 1;
}
.stat-sub {
    font-size: .72rem;
    color: #c4c7d4;
    margin-top: 4px;
}

/* Ring progress */
.ring-wrap { display: flex; align-items: center; gap: 16px; }
.ring { position: relative; width: 52px; height: 52px; flex-shrink: 0; }
.ring svg { transform: rotate(-90deg); }
.ring-bg { fill: none; stroke: #f0f2f8; stroke-width: 5; }
.ring-fill { fill: none; stroke: #3b35e8; stroke-width: 5; stroke-linecap: round; }
.ring-text {
    position: absolute; inset: 0;
    display: flex; align-items: center; justify-content: center;
    font-family: 'Space Grotesk', sans-serif;
    font-size: .65rem; font-weight: 700; color: #3b35e8;
}

/* ── Exams section (preview_color) ── */
.exams-section { grid-column: 1 / -1; padding: 0; }
.exams-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: .85rem;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 12px;
}
.exams-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
}
.exam-card {
    background: var(--card-bg);
    border-radius: 14px;
    padding: 18px 16px;
    box-shadow: 0 1px 3px rgba(0,0,0,.04), 0 4px 12px rgba(0,0,0,.04);
    display: flex;
    flex-direction: column;
    gap: 10px;
    transition: transform .2s, box-shadow .2s;
}
.exam-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0,0,0,.08);
}
.exam-card-top { display: flex; align-items: center; justify-content: space-between; }
.exam-name {
    font-family: 'Space Grotesk', sans-serif;
    font-size: .9rem;
    font-weight: 700;
    color: var(--text-main);
}
.exam-done {
    width: 24px; height: 24px;
    background: var(--success-bg);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
}
.exam-done i { color: var(--success); font-size: .6rem; }
.exam-meta { font-size: .68rem; color: #c4c7d4; }
.exam-score {
    font-family: 'Space Grotesk', sans-serif;
    font-size: .8rem;
    font-weight: 600;
    color: #3b35e8;
}
.exam-progress {
    height: 3px;
    background: var(--bg-color);
    border-radius: 999px;
    overflow: hidden;
    margin-top: 4px;
}
.exam-progress-fill {
    height: 100%;
    background: #3b35e8;
    border-radius: 999px;
}
.exam-btn {
    padding: 8px 0;
    border-radius: 8px;
    font-size: .75rem;
    font-weight: 600;
    font-family: 'Space Grotesk', sans-serif;
    border: none;
    cursor: pointer;
    text-align: center;
    transition: opacity .15s;
}
.exam-btn:hover { opacity: .85; }
.exam-btn.start { background: #3b35e8; color: #fff; }
.exam-btn.replay { background: var(--primary-bg); color: #3b35e8; }

/* --- EXAM VIEW (FULL SCREEN) - hidden by default, JS shows with display:flex --- */
#exam-view {
    display: none;
    height: 100vh;
    flex-direction: column;
    background: var(--bg-color);
}

.exam-header {
    height: 72px;
    padding: 0 32px;
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--card-bg);
    z-index: 50;
}

.timer-box {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-color);
    padding: 8px 16px;
    border-radius: 12px;
    border: 1px solid rgba(99, 102, 241, 0.2);
    font-family: 'Fira Code', monospace;
    font-weight: 600;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.exam-content-wrapper {
    flex: 1;
    display: flex;
    overflow: hidden;
}

.split-pane {
    flex: 1;
    padding: 40px;
    overflow-y: auto;
}

.split-pane.left {
    border-right: 1px solid var(--glass-border);
    background: var(--card-bg);
    max-width: 50%;
}

.split-pane.right {
    max-width: 50%;
}

.context-box {
    background: var(--bg-color);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 30px;
    line-height: 1.8;
    color: var(--text-secondary);
}

.question-interaction {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.option-btn {
    display: flex;
    align-items: center;
    width: 100%;
    padding: 16px 20px;
    margin-bottom: 12px;
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    color: var(--text-main);
    cursor: pointer;
    transition: all 0.2s;
    text-align: left;
    font-family: var(--font-body);
    font-size: 1rem;
}

.option-btn:hover {
    background: var(--primary-bg);
    border-color: var(--primary-color);
}

.option-btn.selected {
    background: var(--primary-bg);
    border-color: var(--primary-color);
    color: var(--text-main);
}

.option-btn .circle {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: 2px solid var(--text-muted);
    margin-right: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    flex-shrink: 0;
}

.option-btn.selected .circle {
    border-color: var(--primary-color);
    background: var(--primary-color);
    color: white;
}

/* --- ADMIN PANEL --- */
.admin-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 40px 24px;
}

.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--glass-border);
}

/* --- TABS --- */
.tabs-nav {
    display: flex;
    gap: 12px;
    margin-bottom: 32px;
    overflow-x: auto;
    padding-bottom: 8px;
    /* Slightly more space for scrollbar */
}

/* Ensure tab buttons have correct base styles if not fully covered by shared */
.tab-btn {
    padding: 10px 20px;
    font-size: 0.95rem;
    font-weight: 600;
    font-family: var(--font-body);
    white-space: nowrap;
    cursor: pointer;
    border-radius: 12px;
    background: transparent;
    border: 1px solid var(--glass-border);
    color: var(--text-muted);
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.tab-btn:hover {
    background: var(--primary-bg);
    color: var(--primary-color);
    transform: translateY(-1px);
}

.tab-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.filters-panel {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 24px;
    margin-bottom: 32px;
}

.filter-row-top {
    display: flex;
    gap: 16px;
    margin-bottom: 20px;
    align-items: center;
}

.search-box {
    position: relative;
    flex: 1;
}

.search-box input {
    padding-left: 48px;
    /* Space for icon */
}

.search-box i {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
    font-size: 1.1rem;
}

.filter-row-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.filter-checks {
    display: flex;
    gap: 20px;
}

.filter-checks label {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0;
    cursor: pointer;
    color: var(--text-muted);
}

.filter-checks input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary-color);
}

/* Forms */
.form-group {
    margin-bottom: 24px;
}

/* Tables */
.table-container {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    overflow: hidden;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th {
    text-align: left;
    padding: 18px 24px;
    color: var(--text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
    border-bottom: 1px solid var(--glass-border);
    background: var(--bg-color);
}

td {
    padding: 18px 24px;
    border-bottom: 1px solid var(--glass-border);
    font-size: 0.95rem;
    color: var(--text-main);
}

tr:last-child td {
    border-bottom: none;
}

tr:hover td {
    background: var(--bg-color);
}

/* Report Cards (Signalements) */
.reports-grid {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.report-card {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    overflow: hidden;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.report-card:hover {
    border-color: rgba(99, 102, 241, 0.3);
    box-shadow: 0 4px 20px -5px rgba(99, 102, 241, 0.15);
}

.report-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1.5rem;
    padding: 1.25rem 1.5rem;
    background: var(--bg-color);
    border-bottom: 1px solid var(--glass-border);
    flex-wrap: wrap;
}

.report-subject {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 0.35rem;
}

.report-meta {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.report-meta strong {
    color: var(--text-main);
    font-weight: 500;
}

.report-header .report-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-shrink: 0;
}

.report-header .report-actions .status-tag {
    background: var(--bg-color);
    padding: 0.35rem 0.75rem;
    border-radius: 8px;
    border: 1px solid var(--glass-border);
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-right: 0.5rem;
}

.report-header .report-actions button {
    border: none;
    padding: 0.5rem 0.65rem;
    border-radius: 8px;
    cursor: pointer;
    transition: opacity 0.2s, transform 0.2s;
}

.report-header .report-actions button:hover {
    opacity: 0.9;
    transform: scale(1.05);
}

.report-header .report-actions button[title="Voir le détail"] {
    background: var(--primary-color);
    color: white;
}

.report-header .report-actions button[title="Valider / Résoudre"] {
    background: var(--success);
    color: white;
}

.report-header .report-actions button[title="Supprimer"] {
    background: var(--error);
    color: white;
}

.report-content {
    padding: 1.25rem 1.5rem;
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* Badges & Status */
.status-badge {
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 600;
}

.status-success {
    background: rgba(34, 197, 94, 0.15);
    color: var(--success);
}

.status-warning {
    background: rgba(245, 158, 11, 0.15);
    color: #f59e0b;
}

.status-error {
    background: rgba(239, 68, 68, 0.15);
    color: var(--error);
}

/* --- QCM GENERATION MODAL --- */
.qcm-modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 5000;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.qcm-modal {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    padding: 2rem;
    border-radius: 24px;
    width: 90%;
    max-width: 600px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
    position: relative;
    animation: modalPop 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes modalPop {
    from {
        transform: scale(0.9);
        opacity: 0;
    }

    to {
        transform: scale(1);
        opacity: 1;
    }
}

.qcm-option-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 16px;
    margin-top: 24px;
}

.qcm-option-card {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 24px 16px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.qcm-option-card:hover {
    background: rgba(99, 102, 241, 0.1);
    border-color: var(--primary-color);
    transform: translateY(-4px);
}

.qcm-option-card i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.qcm-option-card h4 {
    margin: 0;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-main);
}

.qcm-option-card.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    filter: grayscale(1);
}

.qcm-option-card.disabled:hover {
    transform: none;
    background: var(--card-bg);
    border-color: var(--glass-border);
}

/* --- QCM STUDIO LAYOUT --- */
.qcm-header-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
}

.qcm-btn {
    padding: 10px 20px;
    border-radius: 10px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    color: var(--text-muted);
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.qcm-btn:hover:not(:disabled) {
    background: var(--bg-color);
    color: var(--text-main);
}

.qcm-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

.qcm-btn-primary:hover:not(:disabled) {
    background: var(--primary-hover);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.qcm-layout {
    display: grid;
    grid-template-columns: 280px 1fr 280px;
    gap: 24px;
    height: 650px;
    /* Fixed height for the dashboard look */
    align-items: stretch;
}

.qcm-panel {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    height: 100%;
}

.qcm-panel-head {
    padding: 16px 20px;
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-main);
    background: var(--bg-color);
}

.qcm-pill {
    background: var(--bg-color);
    padding: 2px 8px;
    border-radius: 99px;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.qcm-search {
    width: 100%;
    padding: 12px 16px;
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--glass-border);
    color: var(--text-main);
    font-family: inherit;
    font-size: 0.9rem;
    outline: none;
}

.qcm-search::placeholder {
    color: var(--text-muted);
}

.qcm-file-list {
    flex: 1;
    overflow-y: auto;
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.qcm-file-item {
    padding: 12px 16px;
    border-radius: 12px;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all 0.2s;
    background: transparent;
}

.qcm-file-item:hover {
    background: var(--bg-color);
}

.qcm-file-item.active {
    background: var(--primary-bg);
    border-color: var(--primary-color);
}

.qcm-file-item strong {
    display: block;
    color: var(--text-main);
    font-size: 0.9rem;
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.qcm-file-item small {
    display: block;
    color: var(--text-muted);
    font-size: 0.75rem;
}

/* Middle Column Override */
.qcm-content {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 32px;
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
}

/* Console */
/* Console */
.qcm-console {
    /* Removed specific background to inherit panel style */
    font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    height: 100%;
}

.qcm-console .qcm-panel-head {
    /* Removed specific background to inherit panel style */
    border-bottom: 1px solid var(--glass-border);
}

#qcm-console-output {
    padding: 16px;
    margin: 0;
    font-family: inherit;
    /* Inherit monospace font */
    font-size: 0.85rem;
    color: #a5b4fc;
    /* Indigoe-300, better readable terminal color */
    white-space: pre-wrap;
    overflow-y: auto;
    flex: 1;
    line-height: 1.6;
}

/* Custom scrollbar for console specifically */
#qcm-console-output::-webkit-scrollbar-thumb {
    background: rgba(99, 102, 241, 0.3);
    /* Tinted scrollbar */
}

/* Scrollbars for panels */
.qcm-file-list::-webkit-scrollbar,
#qcm-console-output::-webkit-scrollbar,
.qcm-content::-webkit-scrollbar {
    width: 6px;
}

.qcm-file-list::-webkit-scrollbar-track,
#qcm-console-output::-webkit-scrollbar-track,
.qcm-content::-webkit-scrollbar-track {
    background: transparent;
}

.qcm-file-list::-webkit-scrollbar-thumb,
#qcm-console-output::-webkit-scrollbar-thumb,
.qcm-content::-webkit-scrollbar-thumb {
    background: #c4c7d4;
    border-radius: 3px;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* --- EXAM VIEW (base) --- */
.exam-view {
    display: none;
    height: 100vh;
    flex-direction: column;
    overflow: hidden;
}

.exam-header {
    background: var(--card-bg);
    padding: 1rem 2rem;
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 100;
    flex-shrink: 0;
}

.exam-header-title {
    font-weight: 700;
    font-size: 1.2rem;
    font-family: var(--font-heading);
}

.exam-timer {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-color);
    padding: 0.5rem 1rem;
    border-radius: 12px;
    border: 1px solid rgba(99, 102, 241, 0.2);
    font-family: 'JetBrains Mono', ui-monospace, monospace;
    font-size: 1.2rem;
    font-weight: 700;
}

.exam-content-wrapper {
    flex: 1;
    display: flex;
    overflow: hidden;
    min-height: 0;
}

.exam-context-pane {
    flex: 1;
    padding: 2.5rem;
    overflow-y: auto;
    border-right: 1px solid var(--glass-border);
    background: var(--card-bg);
    min-width: 0;
}

.exam-context-label {
    font-size: 0.8rem;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    font-weight: 700;
    letter-spacing: 1px;
}

.exam-context-text {
    line-height: 1.8;
    white-space: pre-wrap;
    font-size: 1.05rem;
    color: var(--text-secondary);
    font-family: var(--font-body);
}

.exam-questions-pane {
    flex: 1;
    padding: 2.5rem;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    background: var(--bg-color);
    min-width: 0;
}

.exam-questions-inner { margin-bottom: 2rem; }

.exam-q-header { margin-bottom: 1.5rem; }

.exam-q-badge {
    background: var(--primary-color);
    color: white;
    padding: 0.4rem 1rem;
    border-radius: 30px;
    font-size: 0.85rem;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.exam-question-prompt {
    font-size: 1.4rem;
    margin-bottom: 2.5rem;
    font-family: var(--font-heading);
    color: var(--text-main);
}

.exam-options-grid { display: grid; gap: 1rem; }

.exam-nav-buttons {
    margin-top: auto;
    display: flex;
    justify-content: space-between;
    padding-top: 2rem;
    border-top: 1px solid var(--glass-border);
    flex-wrap: wrap;
    gap: 0.75rem;
}

.exam-nav-buttons .cta-button { border-radius: 12px; padding: 0.8rem 1.5rem; }

/* Result view score grid */
.result-score-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
    margin-bottom: 4rem;
}

.result-score-card {
    background: var(--bg-color);
    padding: 2rem;
    border-radius: 20px;
    border: 1px solid var(--glass-border);
    transition: transform 0.3s ease;
}

/* Report FAB */
.report-fab-wrapper {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 100;
}

.report-fab {
    background: var(--error);
    color: white;
    border: none;
    padding: 1rem;
    border-radius: 50%;
    width: 60px;
    height: 60px;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(239, 68, 68, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    transition: transform 0.2s;
}

.report-fab:hover { transform: scale(1.08); }

/* Result view layout */
.result-view {
    display: none;
    padding: 3rem 20px;
    max-width: 900px;
    margin: 0 auto;
    min-height: 100vh;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

/* Review modal body layout */
.review-modal-body {
    flex: 1;
    overflow-y: auto;
    padding: 2.5rem;
    display: flex;
    gap: 3rem;
}

.review-context-col {
    flex: 1;
    border-right: 1px solid var(--glass-border);
    padding-right: 2.5rem;
    display: none; /* JS shows when context exists */
}

.review-context-col .font-body,
#review-text {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.7;
    font-family: var(--font-body);
}

.result-view > div {
    background: var(--card-bg);
    padding: 4rem;
    border-radius: 32px;
    border: 1px solid var(--glass-border);
    width: 100%;
    box-shadow: var(--card-shadow);
    text-align: center;
}

/* --- RESPONSIVE: Tablet (max 1024px) --- */
@media (max-width: 1024px) {
    .exam-content-wrapper {
        flex-direction: column;
        overflow-y: auto;
    }

    .exam-context-pane {
        border-right: none;
        border-bottom: 1px solid var(--glass-border);
        max-height: 40vh;
        flex: none;
    }

    .exam-questions-pane {
        flex: 1;
        min-height: 0;
    }

    .exams-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    .content-grid {
        padding: 20px 24px;
        grid-template-columns: 1fr 1fr;
    }
    .hero { padding: 24px 24px 20px; }

    .dashboard-container { padding: 24px 16px; }

    .header-bar .user-welcome-box h2 { font-size: 1.1rem; }

    .header-bar > div:last-child { flex-wrap: wrap; }
}

/* --- RESPONSIVE: Mobile (max 768px) --- */
@media (max-width: 768px) {
    .header-bar {
        flex-direction: column;
        align-items: stretch;
        gap: 16px;
        margin-bottom: 32px;
    }

    .header-bar > div:last-child {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
    }

    .header-bar .cta-button {
        flex: 1;
        min-width: 120px;
        padding: 0.6rem 1rem;
        font-size: 0.9rem;
    }

    .content-grid {
        padding: 16px;
        grid-template-columns: 1fr;
        gap: 12px;
    }
    .hero { padding: 20px 16px 16px; }
    .hero-title { font-size: 1.6rem; }
    .exams-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
    .exam-card { padding: 14px 12px; }
    .stat-val { font-size: 1.5rem; }

    .toeic-icon { font-size: 2rem; }
    .toeic-title { font-size: 1.1rem; }

    .dashboard-container { padding: 20px 12px; }

    /* Exam view mobile */
    .exam-header {
        padding: 0.75rem 1rem;
        flex-wrap: wrap;
        gap: 10px;
    }

    .exam-header-title { font-size: 1rem; }

    .exam-timer { font-size: 1rem; padding: 0.4rem 0.75rem; }

    .exam-quit-btn { padding: 0.4rem 0.75rem !important; font-size: 0.85rem; }

    .exam-context-pane {
        padding: 1.25rem;
        max-height: 35vh;
        font-size: 0.95rem;
    }

    .exam-context-label { font-size: 0.75rem; margin-bottom: 1rem; }

    .exam-questions-pane { padding: 1.25rem; }

    .exam-question-prompt {
        font-size: 1.2rem;
        margin-bottom: 1.5rem;
    }

    /* Touch-friendly option buttons */
    .option-btn {
        min-height: 48px;
        padding: 14px 18px;
    }

    .exam-nav-buttons {
        flex-direction: column;
        padding-top: 1.5rem;
    }

    .exam-nav-buttons .cta-button {
        width: 100%;
        justify-content: center;
    }

    /* Result view */
    #result-view .cta-button.primary { width: 100%; }

    .result-view { padding: 2rem 12px; }

    .result-view > div { padding: 2rem 1.5rem; }

    #result-view h2 { font-size: 1.75rem; }

    #result-view .alert { padding: 0.75rem; font-size: 0.9rem; }

    /* Report button */
    .report-fab-wrapper {
        bottom: 1rem;
        right: 1rem;
    }
    .report-fab {
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
    }
}

/* --- RESPONSIVE: Small mobile (max 480px) - Portrait phone --- */
@media (max-width: 480px) {
    .exams-grid {
        grid-template-columns: 1fr;
    }
    .exam-card { padding: 16px 14px; }

    .login-card { padding: 24px; }

    .login-wrapper { padding: 12px; }

    .exam-header {
        flex-direction: column;
        align-items: stretch;
    }

    .exam-header-title,
    .exam-timer,
    .exam-quit-btn {
        text-align: center;
    }

    .exam-context-pane {
        padding: 1rem;
        max-height: 30vh;
    }

    .exam-questions-pane { padding: 1rem; }

    .exam-question-prompt { font-size: 1.1rem; }

    .exam-q-badge { font-size: 0.8rem; padding: 0.3rem 0.75rem; }

    /* Result view - stack score cards */
    .result-score-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .result-score-card { padding: 1.5rem; }

    #result-view .result-score-card span:last-child { font-size: 2rem; }

    #result-view .alert { font-size: 0.85rem; }

    /* Review modal full width & stack layout */
    #review-modal .admin-modal-content {
        max-width: 100%;
        margin: 1rem;
        max-height: calc(100vh - 2rem);
    }

    .review-modal-body {
        flex-direction: column !important;
        padding: 1.25rem !important;
    }

    .review-context-col {
        border-right: none !important;
        border-bottom: 1px solid var(--glass-border);
        padding-right: 0 !important;
        padding-bottom: 1.5rem !important;
        margin-bottom: 1rem !important;
    }

    #review-modal h3 { font-size: 1.1rem !important; }

    /* Report modal & other modals on small screens */
    .admin-modal-content {
        width: calc(100% - 1rem);
        max-width: none;
        margin: 0.5rem;
        padding: 1.5rem;
    }
}

/* ─── MOBILE SIDEBAR ─── */
.hamburger-btn {
    display: none;
    position: fixed;
    top: 14px;
    left: 14px;
    z-index: 501;
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-main);
    width: 42px;
    height: 42px;
    border-radius: 10px;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    transition: background 0.2s;
    box-shadow: 0 2px 10px rgba(0,0,0,0.15);
}
.hamburger-btn:hover { background: var(--primary-bg); }

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 499;
    backdrop-filter: blur(2px);
}
.sidebar-overlay.show { display: block; }

@media (max-width: 768px) {
    .hamburger-btn { display: flex; }

    .sidebar {
        position: fixed !important;
        left: 0;
        top: 0;
        height: 100vh;
        z-index: 500;
        transform: translateX(-100%);
        transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .sidebar.open { transform: translateX(0); }

    .main-content,
    .main-content-wrap {
        padding-top: 72px !important;
    }
}

/* Alerts */
.alert {
    padding: 1rem;
    border-radius: 12px;
    margin-bottom: 1.5rem;
    text-align: center;
    border: 1px solid transparent;
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    color: var(--error);
    border-color: rgba(239, 68, 68, 0.2);
}

.alert-success {
    background: rgba(34, 197, 94, 0.1);
    color: var(--success);
    border-color: rgba(34, 197, 94, 0.2);
}

/* --- QCM MIDDLE COLUMN ELEMENTS --- */
.qcm-main-col {
    display: flex;
    flex-direction: column;
    gap: 16px;
    min-width: 0;
    min-height: 0;
    overflow: hidden;
}

.qcm-toolbar {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 12px 20px;
    display: flex;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap;
}

.qcm-info {
    flex: 1;
    min-width: 150px;
}

.qcm-info h3 {
    margin: 0;
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-main);
}

.qcm-info small {
    color: var(--text-muted);
    font-size: 0.75rem;
}

.qcm-nav-pill {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-color);
    padding: 6px 12px;
    border-radius: 99px;
    border: 1px solid var(--glass-border);
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 600;
}

.qcm-nav-pill input {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    color: var(--text-main);
    width: 48px;
    padding: 4px 2px;
    font-size: 0.85rem;
    text-align: center;
    outline: none;
    font-weight: 700;
    font-family: inherit;
    transition: border-color 0.2s;
}

.qcm-nav-pill input:focus {
    border-color: var(--primary);
}

/* Chrome, Safari, Edge, Opera: Remove number spin buttons */
.qcm-nav-pill input::-webkit-outer-spin-button,
.qcm-nav-pill input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

/* Firefox */
.qcm-nav-pill input[type=number] {
    -moz-appearance: textfield;
    appearance: textfield;
}

.qcm-progress-container {
    width: 120px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.qcm-progress-bar {
    height: 6px;
    background: var(--bg-color);
    border-radius: 3px;
    overflow: hidden;
}

.qcm-progress-fill {
    height: 100%;
    background: var(--primary-color);
    width: 0%;
    border-radius: 3px;
    transition: width 0.3s ease;
}

.qcm-controls {
    display: flex;
    justify-content: space-between;
    background: var(--card-bg);
    padding: 16px 20px;
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    align-items: center;
}

/* --- STATS / PERFORMANCE TAB --- */
.stats-grid {
    display: grid;
    gap: 20px;
    grid-template-columns: repeat(auto-fit, minmax(600px, 1fr));
}

.stats-card {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 24px;
    display: flex;
    gap: 24px;
    align-items: flex-start;
    transition: transform 0.2s, box-shadow 0.2s;
}

.stats-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    border-color: rgba(59, 53, 232, 0.2);
}

.stats-metrics {
    min-width: 100px;
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    background: var(--bg-color);
    padding: 16px;
    border-radius: 16px;
    border: 1px solid var(--glass-border);
}

.stats-value {
    font-weight: 800;
    font-size: 2.2rem;
    line-height: 1;
    margin-bottom: 4px;
}

.stats-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
}

.stats-content {
    flex: 1;
    min-width: 0;
}

.stats-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 12px;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
}

.stats-tags {
    display: flex;
    gap: 8px;
    align-items: center;
}

.tag {
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 700;
}

.tag-toeic {
    background: rgba(124, 58, 237, 0.1);
    color: var(--primary-color);
    border: 1px solid rgba(124, 58, 237, 0.2);
}

.tag-id {
    color: var(--text-main);
    font-weight: 600;
}

.stats-meta {
    font-size: 0.85rem;
    color: var(--text-muted);
    background: var(--bg-color);
    padding: 2px 8px;
    border-radius: 4px;
}

.stats-progress-track {
    background: var(--bg-color);
    height: 8px;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 16px;
}

.stats-progress-fill {
    height: 100%;
    border-radius: 4px;
}

.stats-details {
    background: var(--bg-color);
    padding: 16px;
    border-radius: 12px;
    font-size: 0.95rem;
    border: 1px solid var(--glass-border);
    position: relative;
    overflow: hidden;
}

.stats-details::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--text-muted);
    opacity: 0.3;
}

.stats-q-label {
    color: var(--text-muted);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
}

.stats-q-text {
    font-weight: 500;
    margin-bottom: 8px;
    line-height: 1.5;
    color: var(--text-main);
}

.stats-correct {
    color: var(--success);
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--glass-border);
}

.stats-not-found {
    color: var(--text-muted);
    font-style: italic;
    font-size: 0.9rem;
    padding: 8px;
}

/* --- IA FEEDBACK TAB --- */
.ia-progress-track {
    flex: 1;
    height: 8px;
    background: var(--bg-color);
    border-radius: 4px;
    overflow: hidden;
    min-width: 80px;
    max-width: 150px;
}

.ia-progress-fill {
    height: 100%;
    border-radius: 4px;
    transition: width 0.3s ease;
}

.ia-progress-fill.accent {
    background: var(--accent-color);
}

.ia-progress-fill.primary {
    background: var(--primary-color);
}

/* --- ADMIN MODALS (SHARED) --- */
.admin-modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.admin-modal-overlay.active {
    display: flex;
    opacity: 1;
}

.admin-modal-content {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    padding: 2.5rem;
    border-radius: 24px;
    width: 90%;
    max-width: 500px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
    transform: scale(0.95);
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.admin-modal-overlay.active .admin-modal-content {
    transform: scale(1);
}

.admin-modal-title {
    margin-bottom: 2rem;
    color: var(--text-main);
    font-family: var(--font-heading);
    text-align: center;
    font-size: 1.8rem;
    font-weight: 700;
}

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

.admin-label {
    display: block;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    font-weight: 500;
    font-size: 0.9rem;
    margin-left: 4px;
}

.admin-input {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-color);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    color: var(--text-main);
    outline: none;
    font-family: var(--font-body);
    font-size: 0.95rem;
    transition: all 0.2s ease;
}

.admin-input:focus {
    background: var(--card-bg);
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(59, 53, 232, 0.08);
}

.admin-modal-actions {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
    margin-top: 2.5rem;
}

.admin-modal-close {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    background: var(--bg-color);
    border: 1px solid var(--glass-border);
    color: var(--text-muted);
    width: 36px;
    height: 36px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 10;
}

.admin-modal-close:hover {
    background: var(--primary-bg);
    color: var(--primary-color);
    transform: rotate(90deg);
    border-color: var(--primary-color);
}

.admin-modal-close i {
    font-size: 1.2rem;
}