/* ============================================================
   Belajar TKA - Premium Dark Glassmorphism Design System
   ============================================================ */

/* ---- CSS Variables ---- */
:root {
    /* Core Colors */
    --bg-primary: linear-gradient(135deg, #4a89c2 0%, #6cb0eb 100%);
    --bg-secondary: #3474ac;
    --bg-tertiary: #2c6291;
    --bg-card: #ffffff;
    --bg-card-hover: #f8fafc;
    --bg-glass: #ffffff;
    --bg-glass-hover: #f8fafc;
    
    /* Accent Colors */
    --accent-blue: #3474ac;
    --accent-blue-glow: rgba(52, 116, 172, 0.25);
    --accent-purple: #4a89c2;
    --accent-purple-glow: rgba(74, 137, 194, 0.25);
    --accent-emerald: #10b981;
    --accent-emerald-glow: rgba(16, 185, 129, 0.25);
    --accent-amber: #f59e0b;
    --accent-amber-glow: rgba(245, 158, 11, 0.25);
    --accent-rose: #ef4444;
    --accent-rose-glow: rgba(239, 68, 68, 0.25);
    --accent-cyan: #0ea5e9;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #3474ac 0%, #2c6291 100%);
    --gradient-success: linear-gradient(135deg, #10b981 0%, #059669 100%);
    --gradient-premium: linear-gradient(135deg, #4a89c2 0%, #3474ac 100%);
    --gradient-card: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    --gradient-hero: linear-gradient(135deg, #4a89c2 0%, #3474ac 100%);
    
    /* Text */
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-tertiary: #64748b;
    --text-inverse: #ffffff;
    
    /* Borders */
    --border-subtle: #e2e8f0;
    --border-light: #cbd5e1;
    --border-active: #3474ac;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --shadow-glow-blue: 0 0 20px rgba(52, 116, 172, 0.15);
    --shadow-glow-purple: 0 0 20px rgba(74, 137, 194, 0.15);
    
    /* Spacing */
    --nav-height: 64px;
    --bottom-nav-height: 68px;
    --container-padding: 16px;
    
    /* Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Animated background grid */
body::before {
    display: none;
}

/* Background blur orbs (hide for light theme) */
.bg-orb {
    display: none;
}

a {
    color: var(--accent-blue);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--accent-purple);
}

img {
    max-width: 100%;
    height: auto;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Outfit', 'Inter', sans-serif;
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
}

input, select, textarea, button {
    font-family: inherit;
    font-size: inherit;
}

/* ---- Container ---- */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.container-narrow {
    max-width: 600px;
}

/* ---- Main Content ---- */
.main-content {
    position: relative;
    z-index: 1;
    padding-top: calc(var(--nav-height) + 16px);
    min-height: 100vh;
}

.main-content.has-bottom-nav {
    padding-bottom: calc(var(--bottom-nav-height) + 24px);
}

/* ---- Top Navigation ---- */
.top-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--nav-height);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--bg-tertiary);
    z-index: 1000;
    transition: all var(--transition-normal);
}

.top-nav.scrolled {
    background: var(--bg-secondary);
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    flex-shrink: 0;
}

.brand-icon {
    width: 38px;
    height: 38px;
    background: var(--gradient-primary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: white;
    box-shadow: var(--shadow-glow-blue);
}

.brand-text {
    font-family: 'Poppins', sans-serif;
    font-size: 1.3rem;
    font-weight: 800;
    color: #ffffff;
    letter-spacing: -0.5px;
}

.brand-accent {
    color: rgba(255, 255, 255, 0.7);
}

/* Desktop Nav */
.desktop-nav {
    display: none;
    align-items: center;
    gap: 6px;
}

.nav-link {
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
}

.nav-link:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.1);
}

.nav-link.active {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.2);
}

.nav-link.premium-link {
    color: var(--accent-amber);
}

.nav-link.premium-link:hover {
    background: var(--accent-amber-glow);
}

.btn-nav-register {
    padding: 8px 20px;
    background: var(--gradient-primary);
    color: white !important;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.9rem;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-glow-blue);
}

.btn-nav-register:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.3);
}

/* User Menu */
.nav-user-menu {
    position: relative;
}

.nav-user-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-full);
    cursor: pointer;
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.nav-user-btn:hover {
    background: var(--bg-glass-hover);
    border-color: var(--border-light);
}

.user-avatar-small {
    width: 30px;
    height: 30px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 700;
    color: white;
}

.user-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 200px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all var(--transition-normal);
    z-index: 100;
    overflow: hidden;
}

.user-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.user-dropdown a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: all var(--transition-fast);
}

.user-dropdown a:hover {
    background: var(--bg-glass-hover);
    color: var(--text-primary);
}

.dropdown-premium-badge {
    padding: 8px 16px;
    background: var(--accent-amber-glow);
    color: var(--accent-amber);
    font-size: 0.8rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 6px;
}

.dropdown-divider {
    height: 1px;
    background: var(--border-subtle);
    margin: 4px 0;
}

.text-danger {
    color: var(--accent-rose) !important;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
}

.mobile-menu-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-normal);
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Overlay */
.mobile-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 998;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.mobile-overlay.show {
    opacity: 1;
    visibility: visible;
}

/* Mobile Slide Menu */
.mobile-slide-menu {
    position: fixed;
    top: 0;
    right: -300px;
    width: 280px;
    height: 100%;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border-subtle);
    z-index: 999;
    transition: right var(--transition-normal);
    overflow-y: auto;
    padding-top: 20px;
}

.mobile-slide-menu.show {
    right: 0;
}

.mobile-user-info {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 20px 20px 16px;
    border-bottom: 1px solid var(--border-subtle);
    margin-bottom: 8px;
}

.mobile-user-info strong {
    display: block;
    font-size: 0.95rem;
}

.mobile-user-info small {
    color: var(--text-tertiary);
    font-size: 0.8rem;
}

.user-avatar-medium {
    width: 44px;
    height: 44px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    font-weight: 700;
    color: white;
    flex-shrink: 0;
}

.premium-mini-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: var(--accent-amber-glow);
    color: var(--accent-amber);
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-size: 0.7rem;
    font-weight: 600;
    margin-top: 4px;
}

.mobile-guest-info {
    text-align: center;
    padding: 30px 20px;
    border-bottom: 1px solid var(--border-subtle);
    margin-bottom: 8px;
}

.brand-icon-large {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    color: white;
    margin: 0 auto 12px;
    box-shadow: var(--shadow-glow-blue);
}

.mobile-guest-info h3 {
    font-size: 1.2rem;
    margin-bottom: 4px;
}

.mobile-guest-info p {
    color: var(--text-tertiary);
    font-size: 0.85rem;
}

.mobile-nav-links {
    padding: 8px 12px;
}

.mobile-nav-links a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    color: var(--text-secondary);
    font-size: 0.95rem;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.mobile-nav-links a:hover,
.mobile-nav-links a.active {
    background: var(--bg-glass-hover);
    color: var(--text-primary);
}

.mobile-nav-links a.active {
    color: var(--accent-blue);
    background: var(--accent-blue-glow);
}

.mobile-nav-links a.premium-link {
    color: var(--accent-amber);
}

.mobile-nav-links a.highlight {
    background: var(--gradient-primary);
    color: white;
    font-weight: 600;
}

.mobile-nav-divider {
    height: 1px;
    background: var(--border-subtle);
    margin: 8px 0;
}

/* ---- Bottom Navigation ---- */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: var(--bottom-nav-height);
    background: var(--bg-card);
    border-top: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    justify-content: space-around;
    z-index: 900;
    padding-bottom: env(safe-area-inset-bottom, 0);
}

.bottom-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3px;
    padding: 6px 16px;
    color: var(--text-tertiary);
    font-size: 0.7rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    text-decoration: none;
    position: relative;
}

.bottom-nav-item i {
    font-size: 1.3rem;
    transition: all var(--transition-fast);
}

.bottom-nav-item.active {
    color: var(--accent-blue);
}

.bottom-nav-item.active::before {
    content: '';
    position: absolute;
    top: -1px;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: 0 0 4px 4px;
}

.bottom-nav-item:hover {
    color: var(--text-secondary);
}

/* ---- Toast Notifications ---- */
.toast-notification {
    position: fixed;
    top: calc(var(--nav-height) + 16px);
    right: 16px;
    left: 16px;
    max-width: 420px;
    margin-left: auto;
    padding: 14px 18px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    font-weight: 500;
    z-index: 2000;
    animation: slideInRight 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    background: var(--bg-card);
}

.toast-success {
    background: #ffffff;
    border: 1px solid var(--border-subtle);
    border-left: 4px solid var(--accent-emerald);
    color: var(--text-primary);
}

.toast-error {
    background: #ffffff;
    border: 1px solid var(--border-subtle);
    border-left: 4px solid var(--accent-rose);
    color: var(--text-primary);
}

.toast-info {
    background: rgba(59, 130, 246, 0.15);
    border: 1px solid rgba(59, 130, 246, 0.3);
    color: var(--accent-blue);
}

.toast-close {
    margin-left: auto;
    background: none;
    border: none;
    color: inherit;
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0 4px;
    opacity: 0.7;
}

.toast-close:hover {
    opacity: 1;
}

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

/* ---- Glass Card ---- */
.glass-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.glass-card:hover {
    border-color: var(--border-light);
    box-shadow: var(--shadow-md);
}

.glass-card-body {
    padding: 20px;
}

/* ---- Page Header ---- */
.page-header {
    padding: 24px 0 16px;
}

.page-header h1 {
    font-size: 1.6rem;
    margin-bottom: 4px;
    color: #ffffff;
}

.page-header p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
}

.page-breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.page-breadcrumb a {
    color: rgba(255, 255, 255, 0.7);
    transition: color var(--transition-fast);
}

.page-breadcrumb a:hover {
    color: #ffffff;
}

.page-breadcrumb i {
    font-size: 0.6rem;
}

/* ---- Buttons ---- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
    white-space: nowrap;
    line-height: 1.4;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-glow-blue);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(59, 130, 246, 0.35);
    color: white;
}

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

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(16, 185, 129, 0.3);
    color: white;
}

.btn-premium {
    background: var(--gradient-premium);
    color: white;
    box-shadow: 0 0 20px rgba(245, 158, 11, 0.2);
}

.btn-premium:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(245, 158, 11, 0.3);
    color: white;
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-light);
}

.btn-outline:hover {
    background: var(--bg-glass-hover);
    border-color: var(--accent-blue);
    color: var(--accent-blue);
}

.btn-ghost {
    background: var(--bg-glass);
    color: var(--text-secondary);
    border: 1px solid transparent;
}

.btn-ghost:hover {
    background: var(--bg-glass-hover);
    color: var(--text-primary);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.85rem;
    border-radius: var(--radius-sm);
}

.btn-lg {
    padding: 16px 32px;
    font-size: 1.05rem;
    border-radius: var(--radius-lg);
}

.btn-block {
    display: flex;
    width: 100%;
}

.btn-danger {
    background: linear-gradient(135deg, #f43f5e, #e11d48);
    color: white;
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(244, 63, 94, 0.3);
    color: white;
}

/* ---- Form Controls ---- */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all var(--transition-fast);
    outline: none;
}

.form-control:focus {
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px var(--accent-blue-glow);
    background: var(--bg-glass-hover);
}

.form-control::placeholder {
    color: var(--text-tertiary);
}

.form-control-icon {
    position: relative;
}

.form-control-icon .form-control {
    padding-left: 44px;
}

.form-control-icon i {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-tertiary);
    font-size: 1.1rem;
}

.form-hint {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    margin-top: 4px;
}

.form-error {
    font-size: 0.8rem;
    color: var(--accent-rose);
    margin-top: 4px;
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2394a3b8' viewBox='0 0 16 16'%3E%3Cpath d='M7.247 11.14 2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 40px;
}

select.form-control option,
select.form-control optgroup {
    background-color: var(--bg-card);
    color: var(--text-primary);
}

textarea.form-control {
    min-height: 120px;
    resize: vertical;
}

/* ---- Cards Grid ---- */
.cards-grid {
    display: grid;
    gap: 16px;
}

.cards-grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.cards-grid-3 {
    grid-template-columns: repeat(1, 1fr);
}

.cards-grid-4 {
    grid-template-columns: repeat(2, 1fr);
}

/* ---- Stat Card ---- */
.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 18px;
    display: flex;
    align-items: center;
    gap: 14px;
    transition: all var(--transition-normal);
}

.stat-card:hover {
    border-color: var(--border-light);
    transform: translateY(-2px);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    flex-shrink: 0;
}

.stat-icon.blue { background: var(--accent-blue-glow); color: var(--accent-blue); }
.stat-icon.purple { background: var(--accent-purple-glow); color: var(--accent-purple); }
.stat-icon.emerald { background: var(--accent-emerald-glow); color: var(--accent-emerald); }
.stat-icon.amber { background: var(--accent-amber-glow); color: var(--accent-amber); }
.stat-icon.rose { background: var(--accent-rose-glow); color: var(--accent-rose); }

.stat-info h3 {
    font-size: 1.4rem;
    font-weight: 800;
    line-height: 1;
}

.stat-info p {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    margin-top: 2px;
}

/* ---- Subject Card ---- */
.subject-card {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
    cursor: pointer;
    text-decoration: none;
    color: var(--text-primary);
    position: relative;
    overflow: hidden;
}

.subject-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.subject-card:hover {
    border-color: var(--border-active);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow-blue);
    color: var(--text-primary);
}

.subject-card:hover::before {
    opacity: 1;
}

.subject-card.locked {
    opacity: 0.6;
}

.subject-card.locked::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(6, 8, 15, 0.4);
    border-radius: inherit;
}

.subject-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    flex-shrink: 0;
    background: var(--accent-blue-glow);
    color: var(--accent-blue);
}

.subject-info {
    flex: 1;
    min-width: 0;
}

.subject-info h4 {
    font-size: 0.95rem;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.subject-info p {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    margin-top: 2px;
}

.subject-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    border-radius: var(--radius-full);
    font-size: 0.7rem;
    font-weight: 600;
}

.badge-free {
    background: #10b981;
    color: #ffffff;
}

.badge-premium {
    background: #f59e0b;
    color: #ffffff;
}

.subject-arrow {
    color: var(--text-tertiary);
    font-size: 1.1rem;
    flex-shrink: 0;
}

.subject-lock {
    position: absolute;
    top: 50%;
    right: 16px;
    transform: translateY(-50%);
    z-index: 2;
    color: var(--accent-amber);
    font-size: 1.2rem;
}

/* ---- Jenjang Card ---- */
.jenjang-card {
    display: block;
    padding: 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    text-align: center;
    transition: all var(--transition-normal);
    text-decoration: none;
    color: var(--text-primary);
    position: relative;
    overflow: hidden;
}

.jenjang-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.jenjang-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-active);
    box-shadow: var(--shadow-glow-blue);
    color: var(--text-primary);
}

.jenjang-card:hover::after {
    transform: scaleX(1);
}

.jenjang-icon {
    width: 72px;
    height: 72px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin: 0 auto 16px;
    transition: transform var(--transition-normal);
}

.jenjang-card:hover .jenjang-icon {
    transform: scale(1.1);
}

.jenjang-card h3 {
    font-size: 1.05rem;
    margin-bottom: 6px;
}

.jenjang-card p {
    font-size: 0.8rem;
    color: var(--text-tertiary);
}

.jenjang-mapel-count {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    margin-top: 10px;
    padding: 4px 12px;
    background: var(--bg-glass);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* ---- Difficulty Badge ---- */
.difficulty-badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 10px;
    border-radius: var(--radius-full);
    font-size: 0.7rem;
    font-weight: 600;
}

.badge-easy {
    background: var(--accent-emerald-glow);
    color: var(--accent-emerald);
}

.badge-medium {
    background: var(--accent-amber-glow);
    color: var(--accent-amber);
}

.badge-hard {
    background: var(--accent-rose-glow);
    color: var(--accent-rose);
}

/* ---- Type Badge ---- */
.type-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 10px;
    border-radius: var(--radius-full);
    font-size: 0.7rem;
    font-weight: 500;
    background: var(--accent-blue-glow);
    color: var(--accent-blue);
}

/* ---- Progress Bar ---- */
.progress-bar-container {
    width: 100%;
    height: 6px;
    background: var(--bg-glass);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.progress-bar-fill.success {
    background: var(--gradient-success);
}

.progress-bar-fill.warning {
    background: var(--gradient-premium);
}

/* ---- Section Headers ---- */
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.section-header h2 {
    font-size: 1.15rem;
    display: flex;
    align-items: center;
    gap: 8px;
    color: #ffffff;
}

.section-header a {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.9);
    display: flex;
    align-items: center;
    gap: 4px;
}

/* ---- History Item ---- */
.history-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 16px;
    border-bottom: 1px solid var(--border-subtle);
    transition: background var(--transition-fast);
}

.history-item:last-child {
    border-bottom: none;
}

.history-item:hover {
    background: var(--bg-glass);
}

.history-score {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    font-weight: 800;
    flex-shrink: 0;
    border: 2px solid;
}

.history-score.excellent {
    border-color: var(--accent-emerald);
    color: var(--accent-emerald);
    background: var(--accent-emerald-glow);
}

.history-score.good {
    border-color: var(--accent-blue);
    color: var(--accent-blue);
    background: var(--accent-blue-glow);
}

.history-score.average {
    border-color: var(--accent-amber);
    color: var(--accent-amber);
    background: var(--accent-amber-glow);
}

.history-score.poor {
    border-color: var(--accent-rose);
    color: var(--accent-rose);
    background: var(--accent-rose-glow);
}

.history-info {
    flex: 1;
    min-width: 0;
}

.history-info h4 {
    font-size: 0.9rem;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.history-info p {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    margin-top: 2px;
}

.history-meta {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    text-align: right;
    flex-shrink: 0;
}

/* ---- Auth Pages ---- */
.auth-container {
    min-height: calc(100vh - var(--nav-height));
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px 16px;
}

.auth-card {
    width: 100%;
    max-width: 420px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    padding: 32px 24px;
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.auth-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--gradient-primary);
}

.auth-header {
    text-align: center;
    margin-bottom: 28px;
}

.auth-header .brand-icon {
    width: 56px;
    height: 56px;
    font-size: 28px;
    margin: 0 auto 16px;
}

.auth-header h1 {
    font-size: 1.5rem;
    margin-bottom: 6px;
}

.auth-header p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.auth-divider {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 20px 0;
    color: var(--text-tertiary);
    font-size: 0.8rem;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-subtle);
}

.auth-footer {
    text-align: center;
    margin-top: 20px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* ---- Hero Section (Landing) ---- */
.hero-section {
    padding: 40px 0 32px;
    text-align: center;
    position: relative;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.12) 0%, transparent 60%);
    pointer-events: none;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 16px;
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.4);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    color: #ffffff;
    margin-bottom: 20px;
    animation: fadeInUp 0.6s ease;
}

.hero-title {
    font-size: 2rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 16px;
    color: #ffffff;
    animation: fadeInUp 0.6s ease 0.1s both;
}

.hero-title .gradient-text {
    color: #facc15; /* Yellow/Amber to stand out on blue */
}

.hero-subtitle {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.9);
    max-width: 520px;
    margin: 0 auto 28px;
    line-height: 1.6;
    animation: fadeInUp 0.6s ease 0.2s both;
}

.hero-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
    align-items: center;
    animation: fadeInUp 0.6s ease 0.3s both;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-top: 40px;
    animation: fadeInUp 0.6s ease 0.4s both;
}

.hero-stat {
    text-align: center;
    padding: 16px 8px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
}

.hero-stat h3 {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--accent-blue);
}

.hero-stat p {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    margin-top: 2px;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ---- Features Section ---- */
.features-section {
    padding: 40px 0;
}

.features-section h2 {
    text-align: center;
    font-size: 1.5rem;
    margin-bottom: 8px;
    color: #ffffff;
}

.features-subtitle {
    text-align: center;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 32px;
    font-size: 0.9rem;
}

.feature-card {
    padding: 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-light);
    box-shadow: var(--shadow-md);
}

.feature-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin: 0 auto 14px;
}

.feature-card h3 {
    font-size: 1rem;
    margin-bottom: 8px;
}

.feature-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ---- Premium Page ---- */
.pricing-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    padding: 28px 20px;
    text-align: center;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.pricing-card.popular {
    border-color: var(--accent-blue);
    box-shadow: var(--shadow-glow-blue);
}

.pricing-card.popular::before {
    content: 'Paling Populer';
    position: absolute;
    top: 12px;
    right: -32px;
    background: var(--gradient-primary);
    color: white;
    padding: 4px 40px;
    font-size: 0.7rem;
    font-weight: 700;
    transform: rotate(45deg);
}

.pricing-card:hover {
    transform: translateY(-4px);
}

.pricing-name {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.pricing-price {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 4px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.pricing-period {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    margin-bottom: 20px;
}

.pricing-features {
    list-style: none;
    margin-bottom: 24px;
    text-align: left;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 0;
    font-size: 0.85rem;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-subtle);
}

.pricing-features li:last-child {
    border-bottom: none;
}

.pricing-features li i {
    color: var(--accent-emerald);
    font-size: 1rem;
}

/* ---- Circular Progress ---- */
.circular-progress {
    position: relative;
    width: 140px;
    height: 140px;
    margin: 0 auto;
}

.circular-progress svg {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.circular-progress circle {
    fill: none;
    stroke-width: 8;
    stroke-linecap: round;
}

.circular-progress .bg-circle {
    stroke: var(--border-subtle);
}

.circular-progress .progress-circle {
    stroke: url(#gradient);
    stroke-dasharray: 408;
    stroke-dashoffset: 408;
    transition: stroke-dashoffset 1.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.circular-progress .score-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.circular-progress .score-value {
    font-size: 2.2rem;
    font-weight: 800;
    line-height: 1;
    font-family: 'Outfit', sans-serif;
}

.circular-progress .score-label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    margin-top: 4px;
}

/* ---- Empty State ---- */
.empty-state {
    text-align: center;
    padding: 48px 24px;
}

.empty-state i {
    font-size: 3rem;
    color: var(--text-tertiary);
    margin-bottom: 16px;
}

.empty-state h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.empty-state p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 20px;
}

/* ---- Tabs ---- */
.tab-nav {
    display: flex;
    gap: 4px;
    margin-bottom: 20px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-bottom: 4px;
}

.tab-nav::-webkit-scrollbar { display: none; }

.tab-btn {
    padding: 10px 20px;
    background: none;
    border: 1px solid transparent;
    border-radius: var(--radius-full);
    color: rgba(255, 255, 255, 0.7);
    font-weight: 500;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.tab-btn.active {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.3);
    color: #ffffff;
}

.tab-btn:hover:not(.active) {
    background: rgba(255, 255, 255, 0.1);
    color: #ffffff;
}

/* ---- Search Bar ---- */
.search-bar {
    position: relative;
    margin-bottom: 20px;
}

.search-bar input {
    width: 100%;
    padding: 12px 16px 12px 44px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-full);
    color: var(--text-primary);
    font-size: 0.9rem;
    outline: none;
    transition: all var(--transition-fast);
}

.search-bar input:focus {
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px var(--accent-blue-glow);
}

.search-bar i {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-tertiary);
}

/* ---- Table ---- */
.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-subtle);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

.data-table th {
    padding: 12px 14px;
    background: #f8fafc;
    color: var(--text-primary);
    font-weight: 600;
    text-align: left;
    white-space: nowrap;
    border-bottom: 2px solid var(--border-light);
}

.data-table td {
    padding: 12px 14px;
    border-bottom: 1px solid var(--border-subtle);
    color: var(--text-secondary);
}

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

.data-table tr:hover td {
    background: #f1f5f9;
}

/* ---- Pagination ---- */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    margin-top: 24px;
}

.pagination a, .pagination span {
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.pagination a:hover {
    background: var(--bg-glass-hover);
    color: var(--text-primary);
}

.pagination .active {
    background: var(--accent-blue-glow);
    color: var(--accent-blue);
}

/* ---- Admin Specific ---- */
.admin-layout {
    display: grid;
    grid-template-columns: 1fr;
    min-height: calc(100vh - var(--nav-height));
}

.admin-sidebar {
    display: none;
}

.admin-content {
    padding: 20px;
}

/* ---- Skeleton Loading ---- */
.skeleton {
    background: linear-gradient(90deg, var(--bg-glass) 25%, var(--bg-glass-hover) 50%, var(--bg-glass) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius-sm);
}

@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

/* ---- Confetti Animation ---- */
@keyframes confetti-fall {
    0% { transform: translateY(-100vh) rotate(0deg); opacity: 1; }
    100% { transform: translateY(100vh) rotate(720deg); opacity: 0; }
}

.confetti {
    position: fixed;
    width: 10px;
    height: 10px;
    top: -10px;
    z-index: 3000;
    animation: confetti-fall 3s linear forwards;
}

/* ---- Quiz Specific ---- */
.quiz-header {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 16px;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
}

.quiz-timer {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--accent-rose-glow);
    border: 1px solid rgba(244, 63, 94, 0.3);
    border-radius: var(--radius-full);
    color: var(--accent-rose);
    font-weight: 700;
    font-size: 1rem;
    font-family: 'Outfit', monospace;
}

.quiz-timer.warning {
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

.quiz-progress-info {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.quiz-progress-info strong {
    color: var(--text-primary);
}

.quiz-nav-numbers {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 16px;
}

.quiz-nav-num {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid var(--border-subtle);
    background: var(--bg-glass);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.quiz-nav-num.active {
    background: var(--accent-blue);
    border-color: var(--accent-blue);
    color: white;
    box-shadow: var(--shadow-glow-blue);
}

.quiz-nav-num.answered {
    background: var(--accent-emerald-glow);
    border-color: var(--accent-emerald);
    color: var(--accent-emerald);
}

.quiz-nav-num.flagged {
    background: var(--accent-amber-glow);
    border-color: var(--accent-amber);
    color: var(--accent-amber);
}

.question-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 16px;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateX(20px); }
    to { opacity: 1; transform: translateX(0); }
}

.question-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.question-number {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    font-weight: 600;
}

.question-text {
    font-size: 1rem;
    line-height: 1.7;
    margin-bottom: 20px;
    white-space: pre-line;
}

.answer-option {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 14px 16px;
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    margin-bottom: 10px;
    cursor: pointer;
    transition: all var(--transition-fast);
    user-select: none;
}

.answer-option:hover {
    background: var(--bg-glass-hover);
    border-color: var(--border-light);
}

.answer-option.selected {
    background: var(--accent-blue-glow);
    border-color: var(--accent-blue);
}

.answer-option.correct {
    background: var(--accent-emerald-glow);
    border-color: var(--accent-emerald);
}

.answer-option.incorrect {
    background: var(--accent-rose-glow);
    border-color: var(--accent-rose);
}

.answer-label {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 700;
    flex-shrink: 0;
    background: var(--bg-glass);
    border: 2px solid var(--border-light);
    transition: all var(--transition-fast);
}

.answer-option.selected .answer-label {
    background: var(--accent-blue);
    border-color: var(--accent-blue);
    color: white;
}

.answer-option.correct .answer-label {
    background: var(--accent-emerald);
    border-color: var(--accent-emerald);
    color: white;
}

.answer-option.incorrect .answer-label {
    background: var(--accent-rose);
    border-color: var(--accent-rose);
    color: white;
}

.answer-text {
    flex: 1;
    padding-top: 4px;
    font-size: 0.95rem;
}

.quiz-actions {
    display: flex;
    gap: 12px;
    justify-content: space-between;
    margin-top: 16px;
}

/* Explanation Box */
.explanation-box {
    margin-top: 16px;
    padding: 16px;
    background: rgba(59, 130, 246, 0.08);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--accent-blue);
}

.explanation-box h4 {
    font-size: 0.85rem;
    color: var(--accent-blue);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.explanation-box p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ---- Result Page ---- */
.result-card {
    text-align: center;
    padding: 32px 20px;
}

.result-message {
    font-size: 1.2rem;
    font-weight: 700;
    margin: 16px 0 8px;
}

.result-summary {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin: 24px 0;
}

.result-stat {
    padding: 16px;
    background: var(--bg-glass);
    border-radius: var(--radius-md);
}

.result-stat .number {
    font-size: 1.5rem;
    font-weight: 800;
    font-family: 'Outfit', sans-serif;
}

.result-stat .label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    margin-top: 2px;
}

.result-stat.correct .number { color: var(--accent-emerald); }
.result-stat.wrong .number { color: var(--accent-rose); }
.result-stat.empty .number { color: var(--text-tertiary); }

/* ---- Utilities ---- */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }
.p-2 { padding: 16px; }
.p-3 { padding: 24px; }
.gap-1 { gap: 8px; }
.gap-2 { gap: 16px; }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.flex-wrap { flex-wrap: wrap; }
.flex-1 { flex: 1; }
.hidden { display: none !important; }
.w-full { width: 100%; }

.text-muted { color: var(--text-tertiary); }
.text-blue { color: var(--accent-blue); }
.text-emerald { color: var(--accent-emerald); }
.text-amber { color: var(--accent-amber); }
.text-rose { color: var(--accent-rose); }

.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.text-sm { font-size: 0.85rem; }
.text-xs { font-size: 0.75rem; }
.text-lg { font-size: 1.15rem; }
.text-xl { font-size: 1.3rem; }

/* ---- Responsive ---- */
@media (min-width: 640px) {
    .hero-title { font-size: 2.5rem; }
    .hero-actions { flex-direction: row; }
    .cards-grid-3 { grid-template-columns: repeat(2, 1fr); }
    .auth-card { padding: 40px 32px; }
    :root { --container-padding: 24px; }
}

@media (min-width: 768px) {
    .cards-grid-3 { grid-template-columns: repeat(3, 1fr); }
    .cards-grid-4 { grid-template-columns: repeat(3, 1fr); }
    .hero-title { font-size: 2.8rem; }
}

@media (min-width: 1024px) {
    .mobile-menu-toggle { display: none; }
    .desktop-nav { display: flex; }
    .bottom-nav { display: none; }
    .main-content.has-bottom-nav { padding-bottom: 24px; }
    .cards-grid-4 { grid-template-columns: repeat(4, 1fr); }
    .hero-title { font-size: 3.2rem; }
    .hero-section { padding: 80px 0 48px; }
    :root { --container-padding: 32px; }
    
    .admin-layout {
        grid-template-columns: 260px 1fr;
    }
    
    .admin-sidebar {
        display: block;
        background: var(--bg-secondary);
        border-right: 1px solid var(--border-subtle);
        padding: 20px 16px;
        position: sticky;
        top: var(--nav-height);
        height: calc(100vh - var(--nav-height));
        overflow-y: auto;
    }
}

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

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

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

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

/* ---- Print ---- */
@media print {
    .top-nav, .bottom-nav, .mobile-slide-menu, .mobile-overlay {
        display: none !important;
    }
    body { background: white; color: black; }
    .main-content { padding-top: 0; }
}
/* AI Generated SVG Fix */
.question-text svg, 
.penjelasan-text svg,
.soal-text svg {
    background-color: transparent;
    border-radius: var(--radius-md, 8px);
    margin: 16px auto;
    width: 100%;
    max-width: 400px;
    min-height: 250px;
    color: var(--text-primary);
    overflow: visible !important;
    display: block;
}

/* ---- Modals ---- */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.25s ease-out;
}

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

.modal-content {
    background: var(--bg-card);
    width: 90%;
    max-width: 500px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    transform: translateY(20px) scale(0.95);
    transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
    overflow: hidden;
    border: 1px solid var(--border-subtle);
}

.modal.active .modal-content {
    transform: translateY(0) scale(1);
}

.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-subtle);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.modal-body {
    padding: 24px;
}

.btn-close {
    background: none;
    border: none;
    color: var(--text-tertiary);
    font-size: 1.25rem;
    cursor: pointer;
    transition: color 0.2s ease;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

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