/* ============================================
   RBB Senior Assistant (IT) - Complete Styles
   ============================================ */

/* CSS Custom Properties */
:root {
    /* Light Mode Colors */
    --bg-primary: #f0f2f5;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f8f9fa;
    --text-primary: #1a1a2e;
    --text-secondary: #4a4a6a;
    --text-muted: #6b7280;
    --border-color: rgba(0, 0, 0, 0.08);
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.3);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
    --glass-blur: blur(16px);
    --primary: #6366f1;
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    --secondary: #64748b;
    --success: #22c55e;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;
    --sidebar-bg: #1e1e2e;
    --sidebar-text: #e0e0e0;
    --card-hover: rgba(0, 0, 0, 0.04);
    --option-bg: rgba(255, 255, 255, 0.6);
    --option-hover: rgba(99, 102, 241, 0.1);
    --option-selected: rgba(99, 102, 241, 0.2);
    --option-correct: rgba(34, 197, 94, 0.2);
    --option-wrong: rgba(239, 68, 68, 0.2);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Dark Mode */
[data-theme="dark"] {
    --bg-primary: #0f0f1a;
    --bg-secondary: #1a1a2e;
    --bg-tertiary: #16213e;
    --text-primary: #e0e0e0;
    --text-secondary: #b0b0c0;
    --text-muted: #8888a0;
    --border-color: rgba(255, 255, 255, 0.08);
    --glass-bg: rgba(30, 30, 50, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    --option-bg: rgba(30, 30, 50, 0.8);
    --option-hover: rgba(99, 102, 241, 0.2);
    --option-selected: rgba(99, 102, 241, 0.3);
    --card-hover: rgba(255, 255, 255, 0.05);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.4);
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    transition: background var(--transition-normal), color var(--transition-normal);
    line-height: 1.6;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--secondary);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

/* Loading Screen */
.loading-screen {
    position: fixed;
    inset: 0;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.loader {
    text-align: center;
}

.loader-circle {
    width: 50px;
    height: 50px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 16px;
}

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

.loader-text {
    color: var(--text-secondary);
    font-size: 14px;
}

/* Toast Container */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 8px;
    pointer-events: none;
}

.toast {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 12px 20px;
    color: var(--text-primary);
    font-size: 14px;
    box-shadow: var(--shadow-lg);
    animation: slideInRight 0.3s ease, fadeOut 0.3s ease 2.7s forwards;
    pointer-events: auto;
    display: flex;
    align-items: center;
    gap: 8px;
    max-width: 350px;
}

.toast.success { border-left: 3px solid var(--success); }
.toast.error { border-left: 3px solid var(--danger); }
.toast.warning { border-left: 3px solid var(--warning); }
.toast.info { border-left: 3px solid var(--info); }

@keyframes slideInRight {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

@keyframes fadeOut {
    from { opacity: 1; }
    to { opacity: 0; transform: translateY(-10px); }
}

/* App Container */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 280px;
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    transform: translateX(0);
    transition: transform var(--transition-normal);
    box-shadow: var(--shadow-lg);
}

.sidebar.collapsed {
    transform: translateX(-100%);
}

.sidebar-header {
    padding: 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--primary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: white;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-title {
    font-size: 16px;
    font-weight: 700;
    letter-spacing: 1px;
}

.logo-subtitle {
    font-size: 10px;
    opacity: 0.7;
    text-transform: uppercase;
}

.sidebar-close {
    display: none;
    background: none;
    border: none;
    color: var(--sidebar-text);
    font-size: 18px;
    cursor: pointer;
    padding: 4px;
}

.sidebar-nav {
    flex: 1;
    padding: 16px 12px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: var(--radius-md);
    color: var(--sidebar-text);
    text-decoration: none;
    transition: all var(--transition-fast);
    font-size: 14px;
    cursor: pointer;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
}

.nav-item:hover {
    background: rgba(255, 255, 255, 0.08);
}

.nav-item.active {
    background: var(--primary);
    color: white;
    font-weight: 500;
}

.nav-item i {
    width: 20px;
    text-align: center;
    font-size: 16px;
}

.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-stats {
    display: flex;
    gap: 16px;
}

.sidebar-stat-item {
    display: flex;
    flex-direction: column;
}

.sidebar-stat-value {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary-light);
}

.sidebar-stat-label {
    font-size: 11px;
    opacity: 0.7;
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 280px;
    transition: margin-left var(--transition-normal);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.main-content.expanded {
    margin-left: 0;
}

/* Top Bar */
.top-bar {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--border-color);
    padding: 12px 24px;
    display: flex;
    align-items: center;
    gap: 16px;
    position: sticky;
    top: 0;
    z-index: 50;
    height: 60px;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 20px;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
}

.menu-toggle:hover {
    background: var(--card-hover);
}

.top-bar-title {
    flex: 1;
    font-size: 18px;
    font-weight: 600;
}

.top-bar-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.top-bar-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    font-size: 16px;
}

.top-bar-btn:hover {
    background: var(--card-hover);
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    margin-left: 8px;
}

/* Page Content */
.page-content {
    flex: 1;
    padding: 24px;
    overflow-y: auto;
}

.page {
    max-width: 1200px;
    margin: 0 auto;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Glass Card */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--glass-shadow);
    transition: all var(--transition-normal);
}

.glass-card:hover {
    box-shadow: var(--shadow-lg);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: all var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
}

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

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

.btn-primary:hover:not(:disabled) {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--card-hover);
}

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

.btn-success:hover:not(:disabled) {
    filter: brightness(1.1);
}

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

.btn-danger:hover:not(:disabled) {
    filter: brightness(1.1);
}

.btn-lg {
    padding: 14px 28px;
    font-size: 16px;
    border-radius: var(--radius-lg);
}

.icon-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    font-size: 16px;
}

.icon-btn:hover {
    background: var(--card-hover);
}

.icon-btn.active {
    color: var(--warning);
    border-color: var(--warning);
}

/* Glass Select */
.glass-select {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 10px 14px;
    font-family: inherit;
    font-size: 14px;
    color: var(--text-primary);
    cursor: pointer;
    width: 100%;
    transition: all var(--transition-fast);
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b7280' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
}

.glass-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

/* Toggle Switch */
.toggle-switch {
    position: relative;
    width: 50px;
    height: 26px;
    display: inline-block;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    inset: 0;
    background: var(--bg-tertiary);
    border-radius: 26px;
    transition: var(--transition-fast);
    border: 1px solid var(--border-color);
}

.toggle-slider::before {
    content: '';
    position: absolute;
    height: 20px;
    width: 20px;
    left: 2px;
    bottom: 2px;
    background: white;
    border-radius: 50%;
    transition: var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.toggle-switch input:checked + .toggle-slider {
    background: var(--primary);
}

.toggle-switch input:checked + .toggle-slider::before {
    transform: translateX(24px);
}

/* Badge */
.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge.easy { background: rgba(34, 197, 94, 0.2); color: #16a34a; }
.badge.medium { background: rgba(245, 158, 11, 0.2); color: #d97706; }
.badge.competitive { background: rgba(239, 68, 68, 0.2); color: #dc2626; }

[data-theme="dark"] .badge.easy { color: #4ade80; }
[data-theme="dark"] .badge.medium { color: #fbbf24; }
[data-theme="dark"] .badge.competitive { color: #f87171; }

/* Hero Section */
.hero-section {
    display: flex;
    align-items: center;
    gap: 24px;
    margin-bottom: 24px;
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    color: white;
    border: none;
}

.hero-content {
    flex: 1;
}

.hero-title {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 4px;
}

.hero-subtitle {
    font-size: 16px;
    font-weight: 400;
    opacity: 0.9;
    margin-bottom: 8px;
}

.hero-description {
    font-size: 18px;
    font-weight: 500;
    margin-bottom: 4px;
}

.hero-syllabus {
    font-size: 12px;
    opacity: 0.8;
}

.hero-icon {
    font-size: 80px;
    opacity: 0.3;
}

/* Quick Actions */
.quick-actions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.action-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 24px 16px;
    cursor: pointer;
    border: none;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-family: inherit;
    transition: all var(--transition-normal);
    text-align: center;
}

.action-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.action-card i {
    font-size: 32px;
    color: var(--primary);
}

.action-card span {
    font-size: 16px;
    font-weight: 600;
}

.action-card small {
    font-size: 12px;
    color: var(--text-muted);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    display: flex;
    align-items: center;
    gap: 16px;
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: var(--stat-color, var(--primary));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 20px;
    opacity: 0.9;
}

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 24px;
    font-weight: 700;
}

.stat-label {
    font-size: 12px;
    color: var(--text-muted);
}

/* Progress Section */
.progress-section {
    margin-bottom: 24px;
}

.section-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.progress-bar-container {
    height: 10px;
    background: var(--bg-tertiary);
    border-radius: 5px;
    overflow: hidden;
    margin-bottom: 8px;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    border-radius: 5px;
    transition: width 0.5s ease;
}

.progress-text {
    font-size: 12px;
    color: var(--text-muted);
}

/* Topic Grid */
.topic-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
}

.topic-card {
    padding: 16px;
    border-radius: var(--radius-md);
    background: var(--bg-tertiary);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
    text-align: center;
}

.topic-card:hover {
    border-color: var(--primary);
    background: var(--option-hover);
}

.topic-card h4 {
    font-size: 14px;
    margin-bottom: 4px;
}

.topic-card small {
    font-size: 11px;
    color: var(--text-muted);
}

/* Practice Setup */
.practice-setup, .exam-setup {
    max-width: 700px;
    margin: 0 auto;
}

.setup-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 24px;
    text-align: center;
}

.setup-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 24px;
}

.setup-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.setup-group label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.setup-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Exam Info */
.exam-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
    margin-bottom: 24px;
}

.exam-info-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    font-size: 14px;
}

.exam-info-item i {
    color: var(--primary);
}

/* Quiz Container */
.quiz-container {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

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

.quiz-info {
    display: flex;
    align-items: center;
    gap: 8px;
}

.quiz-topic {
    font-weight: 500;
}

.quiz-timer {
    display: flex;
    align-items: center;
    gap: 6px;
    font-weight: 600;
    font-size: 18px;
    color: var(--primary);
}

.quiz-timer.warning {
    color: var(--danger);
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

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

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

/* Question Card */
.question-card {
    padding: 24px;
}

.question-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.question-number {
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
}

.question-important {
    font-size: 12px;
    color: var(--warning);
    display: flex;
    align-items: center;
    gap: 4px;
}

.question-actions {
    margin-left: auto;
    display: flex;
    gap: 4px;
}

.question-text {
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 20px;
    line-height: 1.7;
}

/* Options */
.options-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.option-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 14px 16px;
    background: var(--option-bg);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 14px;
}

.option-item:hover {
    border-color: var(--primary-light);
    background: var(--option-hover);
}

.option-item.selected {
    border-color: var(--primary);
    background: var(--option-selected);
}

.option-item.correct {
    border-color: var(--success);
    background: var(--option-correct);
}

.option-item.wrong {
    border-color: var(--danger);
    background: var(--option-wrong);
}

.option-item.disabled {
    pointer-events: none;
    opacity: 0.8;
}

.option-letter {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 13px;
    flex-shrink: 0;
}

.option-item.selected .option-letter {
    background: var(--primary);
    color: white;
}

.option-item.correct .option-letter {
    background: var(--success);
    color: white;
}

.option-item.wrong .option-letter {
    background: var(--danger);
    color: white;
}

.option-text {
    flex: 1;
    padding-top: 3px;
}

.option-icon {
    font-size: 16px;
    padding-top: 3px;
}

.option-item.correct .option-icon {
    color: var(--success);
}

.option-item.wrong .option-icon {
    color: var(--danger);
}

/* Question Footer */
.question-footer {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 20px;
    flex-wrap: wrap;
}

/* Explanation Card */
.explanation-card {
    border-left: 4px solid var(--primary);
}

.explanation-card h4 {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
    color: var(--primary);
}

.explanation-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Question Palette */
.question-palette {
    padding: 16px;
}

.question-palette h4 {
    margin-bottom: 12px;
    font-size: 14px;
}

.palette-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.palette-item {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    background: var(--bg-secondary);
}

.palette-item:hover {
    border-color: var(--primary);
}

.palette-item.current {
    border: 2px solid var(--primary);
    font-weight: 700;
}

.palette-item.answered {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.palette-item.skipped {
    background: var(--warning);
    color: white;
    border-color: var(--warning);
}

.palette-item.bookmarked {
    position: relative;
}

.palette-item.bookmarked::after {
    content: '';
    position: absolute;
    top: -2px;
    right: -2px;
    width: 8px;
    height: 8px;
    background: var(--warning);
    border-radius: 50%;
}

/* Quiz Submit Area */
.quiz-submit-area {
    text-align: center;
    margin-top: 8px;
}

/* Results */
.results-container {
    max-width: 700px;
    margin: 0 auto;
}

.results-header {
    text-align: center;
    margin-bottom: 24px;
}

.results-header h2 {
    font-size: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 4px;
}

.results-date {
    font-size: 12px;
    color: var(--text-muted);
}

.results-summary {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-bottom: 24px;
}

.result-card {
    text-align: center;
    padding: 16px;
    border-radius: var(--radius-md);
    background: var(--bg-tertiary);
}

.result-card i {
    font-size: 24px;
    margin-bottom: 8px;
}

.result-card.correct i { color: var(--success); }
.result-card.wrong i { color: var(--danger); }
.result-card.skipped i { color: var(--warning); }
.result-card.marks i { color: var(--primary); }

.result-value {
    display: block;
    font-size: 24px;
    font-weight: 700;
}

.result-label {
    font-size: 12px;
    color: var(--text-muted);
}

.results-stats {
    margin-bottom: 24px;
}

.stat-row {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 14px;
}

.stat-row:last-child {
    border-bottom: none;
}

.results-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Analytics */
.analytics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 20px;
}

.analytics-card {
    min-height: 350px;
}

.analytics-card h3 {
    margin-bottom: 16px;
    font-size: 16px;
}

.analytics-card canvas {
    max-height: 300px;
}

/* Bookmarks & Wrong Questions */
.bookmarks-list, .wrong-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-width: 800px;
    margin: 0 auto;
}

.empty-state {
    text-align: center;
    color: var(--text-muted);
    padding: 40px;
}

.review-question-card {
    padding: 16px;
}

.review-question-card .question-text {
    font-size: 14px;
}

/* Settings */
.settings-container {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.settings-card {
    padding: 20px;
}

.settings-card h3 {
    margin-bottom: 16px;
    font-size: 16px;
}

.setting-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 0;
}

.setting-row .glass-select {
    width: auto;
    min-width: 120px;
}

.settings-card .btn {
    margin: 4px;
}

.about-info p {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

/* Modal */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    padding: 24px;
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
}

.modal h3 {
    margin-bottom: 16px;
}

.modal-actions {
    display: flex;
    gap: 8px;
    justify-content: flex-end;
    margin-top: 20px;
}

/* Page Title */
.page-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .sidebar-close {
        display: block;
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .page-content {
        padding: 16px;
    }
    
    .setup-grid {
        grid-template-columns: 1fr;
    }
    
    .results-summary {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .analytics-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .quick-actions {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .hero-section {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-icon {
        font-size: 50px;
    }
    
    .hero-title {
        font-size: 22px;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .quick-actions {
        grid-template-columns: 1fr;
    }
    
    .results-summary {
        grid-template-columns: 1fr 1fr;
    }
    
    .top-bar-title {
        font-size: 14px;
    }
    
    .question-footer {
        flex-direction: column;
        align-items: center;
    }
    
    .quiz-header {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* Fullscreen mode adjustments */
body.fullscreen .sidebar {
    display: none;
}

body.fullscreen .main-content {
    margin-left: 0;
}

/* Print Styles */
@media print {
    .sidebar, .top-bar, .quiz-submit-area, .question-footer, .question-palette {
        display: none !important;
    }
    
    .main-content {
        margin-left: 0 !important;
    }
    
    .page-content {
        padding: 0 !important;
    }
    
    .glass-card {
        box-shadow: none !important;
        border: 1px solid #ccc !important;
        break-inside: avoid;
    }
}

/* Font Size Variants */
body.font-small { font-size: 14px; }
body.font-large { font-size: 18px; }

body.font-small .question-text { font-size: 14px; }
body.font-large .question-text { font-size: 18px; }