/**
 * ============================================================
 * LEARNILLION - MAIN STYLESHEET
 * ============================================================
 * Version: 2.0
 * All shared styles for the platform
 */

/* ============================================================
   CSS RESET & VARIABLES
   ============================================================ */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    /* Brand Colors */
    --color-primary: #2563EB;
    --color-primary-dark: #1D4ED8;
    --color-primary-light: #3B82F6;
    --color-orange: #F97316;
    --color-orange-dark: #EA580C;
    --color-green: #10B981;
    --color-green-dark: #059669;
    --color-purple: #7C3AED;
    --color-cream: #FEF3C7;
    --color-sky: #E0F2FE;
    --color-yellow: #FBBF24;
    
    /* Content Type Colors */
    --color-game: #F97316;
    --color-quiz: #2563EB;
    --color-worksheet: #10B981;
    
    /* Grays */
    --color-gray-50: #F9FAFB;
    --color-gray-100: #F3F4F6;
    --color-gray-200: #E5E7EB;
    --color-gray-300: #D1D5DB;
    --color-gray-400: #9CA3AF;
    --color-gray-500: #6B7280;
    --color-gray-600: #4B5563;
    --color-gray-700: #374151;
    --color-gray-800: #1F2937;
    --color-gray-900: #111827;
    
    /* Typography */
    --font-heading: 'Quicksand', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
    
    /* Layout */
    --header-height: 64px;
    --max-width: 1400px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.2s ease;
    --transition-slow: 0.3s ease;
}

/* ============================================================
   BASE STYLES
   ============================================================ */
html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.5;
    color: var(--color-gray-800);
    background: linear-gradient(135deg, #FFFBEB 0%, #F0F9FF 50%, #E0F2FE 100%);
    background-attachment: fixed;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a:hover {
    color: var(--color-primary-dark);
}

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

button {
    font-family: inherit;
    cursor: pointer;
}

/* ============================================================
   HEADER
   ============================================================ */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: white;
    border-bottom: 1px solid var(--color-gray-200);
    height: var(--header-height);
}

.header-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
}

.header-minimal {
    background: linear-gradient(135deg, var(--color-sky) 0%, #FEF3C7 100%);
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    flex-shrink: 0;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-purple) 100%);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.logo-text {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--color-gray-800);
}

.logo-text span {
    color: var(--color-primary);
}

/* Back button (minimal header) */
.back-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: white;
    border: none;
    border-radius: var(--radius-full);
    font-weight: 600;
    color: var(--color-gray-700);
    text-decoration: none;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
}

.back-btn:hover {
    background: var(--color-gray-100);
    color: var(--color-gray-900);
}

/* Search */
.search-container {
    flex: 1;
    max-width: 500px;
    position: relative;
}

.search-input {
    width: 100%;
    padding: 0.625rem 1rem 0.625rem 2.75rem;
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-full);
    font-size: 0.9375rem;
    font-family: inherit;
    background: var(--color-gray-50);
    transition: all var(--transition-fast);
}

.search-input:focus {
    outline: none;
    border-color: var(--color-primary);
    background: white;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.search-input::placeholder {
    color: var(--color-gray-400);
}

.search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-gray-400);
    pointer-events: none;
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-shrink: 0;
}

.desktop-only {
    display: inline-flex;
}

/* Mobile menu button */
.mobile-menu-btn {
    display: none;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    padding: var(--spacing-sm);
    color: var(--color-gray-600);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.mobile-menu-btn:hover {
    background: var(--color-gray-100);
    color: var(--color-gray-800);
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.9375rem;
    font-family: inherit;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
    white-space: nowrap;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 0.875rem 1.75rem;
    font-size: 1.0625rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
    color: white;
}

.btn-outline {
    background: white;
    border: 2px solid var(--color-gray-200);
    color: var(--color-gray-700);
}

.btn-outline:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.btn-game {
    background: linear-gradient(135deg, var(--color-orange) 0%, var(--color-orange-dark) 100%);
    color: white;
}

.btn-quiz {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: white;
}

.btn-worksheet {
    background: linear-gradient(135deg, var(--color-green) 0%, var(--color-green-dark) 100%);
    color: white;
}

/* ============================================================
   MOBILE MENU
   ============================================================ */
.mobile-menu-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: 199;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-slow);
}

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

.mobile-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    max-width: 85vw;
    height: 100vh;
    background: white;
    z-index: 200;
    box-shadow: -4px 0 20px rgba(0,0,0,0.15);
    transition: right var(--transition-slow);
    overflow-y: auto;
}

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

.mobile-menu-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) 1.25rem;
    border-bottom: 1px solid var(--color-gray-200);
    background: linear-gradient(135deg, var(--color-sky) 0%, #FEF3C7 100%);
}

.mobile-menu-title {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.125rem;
    color: var(--color-gray-800);
}

.mobile-menu-close {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: none;
    background: white;
    color: var(--color-gray-600);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
}

.mobile-menu-close:hover {
    background: var(--color-gray-100);
    color: var(--color-gray-800);
}

.mobile-menu-content {
    padding: var(--spacing-md);
}

.mobile-menu-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1rem;
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-gray-700);
    text-decoration: none;
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.mobile-menu-link:hover {
    background: var(--color-gray-100);
    color: var(--color-primary);
}

.mobile-menu-link svg {
    width: 20px;
    height: 20px;
    opacity: 0.7;
}

.mobile-menu-divider {
    height: 1px;
    background: var(--color-gray-200);
    margin: 0.75rem 0;
}

.mobile-menu-cta {
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-md);
    background: linear-gradient(135deg, var(--color-cream) 0%, var(--color-sky) 100%);
    border-radius: var(--radius-lg);
    text-align: center;
}

.mobile-menu-cta p {
    font-size: 0.875rem;
    color: var(--color-gray-600);
    margin-bottom: 0.75rem;
}

.mobile-menu-cta .btn {
    width: 100%;
}

/* ============================================================
   FILTER BAR
   ============================================================ */
.filter-bar {
    background: white;
    border-bottom: 1px solid var(--color-gray-200);
    padding: var(--spacing-md) 0;
}

.filter-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.filter-row {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    align-items: center;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.filter-label {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--color-gray-600);
    white-space: nowrap;
}

.filter-chips {
    display: flex;
    gap: 0.375rem;
    flex-wrap: wrap;
}

.filter-chip {
    padding: 0.375rem 0.875rem;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 2px solid var(--color-gray-200);
    background: white;
    color: var(--color-gray-600);
    text-decoration: none;
}

.filter-chip:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.filter-chip.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
}

.filter-chip.active-game {
    background: var(--color-game);
    border-color: var(--color-game);
    color: white;
}

.filter-chip.active-quiz {
    background: var(--color-quiz);
    border-color: var(--color-quiz);
    color: white;
}

.filter-chip.active-worksheet {
    background: var(--color-worksheet);
    border-color: var(--color-worksheet);
    color: white;
}

/* Mobile filter toggle */
.mobile-filter-toggle {
    display: none;
    width: 100%;
    padding: 0.75rem 1rem;
    background: white;
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    font-size: 0.9375rem;
    font-weight: 600;
    font-family: inherit;
    color: var(--color-gray-700);
    cursor: pointer;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.75rem;
}

.mobile-filter-toggle svg {
    transition: transform var(--transition-fast);
}

.mobile-filter-toggle.open svg {
    transform: rotate(180deg);
}

.filter-count-badge {
    background: var(--color-primary);
    color: white;
    font-size: 0.75rem;
    padding: 0.125rem 0.5rem;
    border-radius: var(--radius-full);
    margin-left: var(--spacing-sm);
}

/* Subject dropdown */
.subject-dropdown {
    position: relative;
}

.subject-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 0.375rem 0.875rem;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    border: 2px solid var(--color-gray-200);
    background: white;
    color: var(--color-gray-600);
    transition: all var(--transition-fast);
}

.subject-btn:hover,
.subject-btn.open {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.subject-menu {
    position: absolute;
    top: calc(100% + var(--spacing-sm));
    left: 0;
    min-width: 200px;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-gray-200);
    padding: var(--spacing-sm);
    display: none;
    z-index: 50;
}

.subject-menu.show {
    display: block;
}

.subject-menu-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) 0.75rem;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    color: var(--color-gray-700);
    text-decoration: none;
    transition: background var(--transition-fast);
}

.subject-menu-item:hover {
    background: var(--color-gray-100);
}

.subject-menu-item.active {
    background: var(--color-primary);
    color: white;
}

.subject-menu-divider {
    height: 1px;
    background: var(--color-gray-200);
    margin: var(--spacing-sm) 0;
}

/* Active filters */
.active-filters {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-gray-100);
}

.active-filter-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.25rem 0.5rem 0.25rem 0.75rem;
    background: var(--color-gray-100);
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    color: var(--color-gray-700);
}

.active-filter-tag button {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    border: none;
    background: var(--color-gray-300);
    color: var(--color-gray-600);
    cursor: pointer;
    font-size: 0.75rem;
    line-height: 1;
    transition: all var(--transition-fast);
}

.active-filter-tag button:hover {
    background: var(--color-gray-400);
    color: white;
}

.clear-all-btn {
    font-size: 0.8125rem;
    color: var(--color-primary);
    background: none;
    border: none;
    cursor: pointer;
    font-weight: 500;
    font-family: inherit;
}

.clear-all-btn:hover {
    text-decoration: underline;
}

/* ============================================================
   CONTENT GRID
   ============================================================ */
.results-info {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--spacing-md) var(--spacing-md) var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--color-gray-500);
}

.content-grid {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--spacing-sm) var(--spacing-md) var(--spacing-2xl);
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 1.25rem;
}

.content-card {
    background: white;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-gray-200);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.content-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-gray-300);
}

.card-thumbnail {
    aspect-ratio: 16/10;
    background: var(--color-gray-100);
    position: relative;
    overflow: hidden;
}

.card-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.card-thumbnail-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
}

.card-thumbnail-placeholder.game-bg {
    background: linear-gradient(135deg, #FED7AA 0%, #FDBA74 100%);
}

.card-thumbnail-placeholder.quiz-bg {
    background: linear-gradient(135deg, #BFDBFE 0%, #93C5FD 100%);
}

.card-thumbnail-placeholder.worksheet-bg {
    background: linear-gradient(135deg, #A7F3D0 0%, #6EE7B7 100%);
}

.card-type-badge {
    position: absolute;
    top: 0.75rem;
    left: 0.75rem;
    padding: 0.25rem 0.625rem;
    border-radius: var(--radius-full);
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: white;
}

.badge-game { background: var(--color-game); }
.badge-quiz { background: var(--color-quiz); }
.badge-worksheet { background: var(--color-worksheet); }

.card-body {
    padding: var(--spacing-md);
}

.card-title {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1rem;
    color: var(--color-gray-800);
    margin-bottom: var(--spacing-sm);
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-rating {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    margin-bottom: var(--spacing-sm);
}

.stars {
    display: flex;
    gap: 1px;
    color: var(--color-yellow);
    font-size: 0.875rem;
}

.star-empty {
    color: var(--color-gray-300);
}

.rating-text {
    font-size: 0.8125rem;
    color: var(--color-gray-500);
}

.card-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.8125rem;
    color: var(--color-gray-500);
}

.card-meta-dot {
    width: 3px;
    height: 3px;
    background: var(--color-gray-400);
    border-radius: 50%;
}

/* Empty state */
.empty-state {
    text-align: center;
    padding: 4rem var(--spacing-md);
    max-width: 400px;
    margin: 0 auto;
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
}

.empty-state h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    color: var(--color-gray-800);
    margin-bottom: var(--spacing-sm);
}

.empty-state p {
    color: var(--color-gray-500);
    margin-bottom: var(--spacing-lg);
}

/* Load more */
.load-more-container {
    text-align: center;
    padding: var(--spacing-lg) 0 var(--spacing-2xl);
}

/* ============================================================
   MODALS
   ============================================================ */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200;
    padding: var(--spacing-md);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

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

.modal {
    background: white;
    border-radius: var(--radius-xl);
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    transform: translateY(20px);
    transition: transform var(--transition-normal);
    position: relative;
}

.modal-overlay.show .modal {
    transform: translateY(0);
}

.modal-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: none;
    background: rgba(255,255,255,0.9);
    color: var(--color-gray-600);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    z-index: 10;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: white;
    color: var(--color-gray-800);
}

.modal-thumbnail {
    aspect-ratio: 16/9;
    background: var(--color-gray-100);
    position: relative;
}

.modal-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.modal-thumbnail-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 5rem;
}

.modal-body {
    padding: var(--spacing-lg);
}

.modal-type-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: white;
    margin-bottom: 0.75rem;
}

.modal-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-gray-800);
    margin-bottom: 0.75rem;
}

.modal-rating {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.modal-rating .stars {
    font-size: 1.125rem;
}

.modal-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.modal-meta-tag {
    padding: 0.25rem 0.75rem;
    background: var(--color-gray-100);
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    color: var(--color-gray-600);
}

.modal-description {
    color: var(--color-gray-600);
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
}

.modal-actions {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.modal-play-btn {
    width: 100%;
    padding: var(--spacing-md);
    font-size: 1.125rem;
}

/* Rating section in modal */
.modal-rate-section {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-gray-200);
}

.modal-rate-label {
    font-size: 0.875rem;
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-sm);
}

.rate-stars {
    display: flex;
    gap: 0.25rem;
}

.rate-star {
    font-size: 1.75rem;
    color: var(--color-gray-300);
    cursor: pointer;
    transition: color var(--transition-fast), transform var(--transition-fast);
    background: none;
    border: none;
    padding: 0;
}

.rate-star:hover {
    transform: scale(1.1);
}

.rate-star.active,
.rate-star.hover {
    color: var(--color-yellow);
}

/* Share section */
.modal-share {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-gray-200);
}

.share-label {
    font-size: 0.875rem;
    color: var(--color-gray-500);
}

.share-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid var(--color-gray-200);
    background: white;
    color: var(--color-gray-600);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.share-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

/* Modal loading/error states */
.modal-loading,
.modal-error {
    text-align: center;
    padding: var(--spacing-2xl);
}

.modal-loading .spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--color-gray-200);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-md);
}

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

/* ============================================================
   FULLSCREEN PLAYER
   ============================================================ */
.player-overlay {
    position: fixed;
    inset: 0;
    background: white;
    z-index: 300;
    display: flex;
    flex-direction: column;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    overflow: hidden;
    max-width: 100vw;
}

/* Hide header and other elements when player is open */
body.player-open {
    overflow: hidden !important;
}

body.player-open .header,
body.player-open .mobile-menu,
body.player-open .mobile-menu-overlay {
    display: none !important;
    visibility: hidden !important;
}

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

.player-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-md);
    background: linear-gradient(135deg, var(--color-sky) 0%, #FEF3C7 100%);
    border-bottom: 1px solid var(--color-gray-200);
    flex-shrink: 0;
}

.player-close {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: white;
    border: none;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-family: inherit;
    color: var(--color-gray-700);
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
}

.player-close:hover {
    background: var(--color-gray-100);
}

.player-title {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1.125rem;
    color: var(--color-gray-800);
    flex: 1;
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    padding: 0 var(--spacing-md);
}

.player-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.player-fullscreen-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: white;
    border: none;
    border-radius: var(--radius-md);
    color: var(--color-gray-600);
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
}

.player-fullscreen-btn:hover {
    background: var(--color-gray-100);
    color: var(--color-gray-800);
}

.player-container {
    flex: 1;
    overflow: auto;
    overflow-x: hidden;
    background: white;
    width: 100%;
    max-width: 100vw;
    box-sizing: border-box;
}

/* Ensure game content fits within player container */
.player-container > * {
    max-width: 100%;
    box-sizing: border-box;
}

.player-container style + * {
    max-width: 100%;
    box-sizing: border-box;
}

/* Force game elements to respect container width */
.player-container .game-container,
.player-container .quiz-container,
.player-container .worksheet-container {
    max-width: 100%;
    width: 100%;
    box-sizing: border-box;
    overflow-x: hidden;
}

/* Mobile fixes for player overlay */
@media (max-width: 480px) {
    .player-overlay {
        overflow-x: hidden;
    }
    
    .player-container {
        padding: 0;
        overflow-x: hidden;
    }
    
    /* Scale down large text in games */
    .player-container .question-text {
        font-size: 2rem !important;
    }
    
    .player-container .game-container {
        padding: 1rem !important;
    }
    
    .player-container .question-card {
        padding: 1.5rem 1rem !important;
    }
}

.player-loading,
.player-error,
.player-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    text-align: center;
    padding: var(--spacing-xl);
}

.player-loading .spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--color-gray-200);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: var(--spacing-md);
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
    background: white;
    border-top: 1px solid var(--color-gray-200);
    padding: var(--spacing-lg) 0;
}

.footer-minimal {
    padding: var(--spacing-md) 0;
}

.footer-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--spacing-md) var(--spacing-xl);
}

.footer-link {
    font-size: 0.875rem;
    color: var(--color-gray-500);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: var(--color-primary);
}

.footer-bottom {
    text-align: center;
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-gray-100);
}

.footer-bottom p {
    font-size: 0.8125rem;
    color: var(--color-gray-400);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
    /* Header */
    .desktop-only { display: none; }
    .mobile-menu-btn { display: flex; }
    .search-container { display: none; }
    
    .header.search-open .logo { display: none; }
    .header.search-open .header-actions { display: none; }
    .header.search-open .search-container {
        display: block;
        flex: 1;
        max-width: none;
    }
    
    /* Filter bar */
    .filter-bar { padding: 0.75rem 0; }
    .mobile-filter-toggle { display: flex; }
    
    .filter-row {
        display: none;
        flex-direction: column;
        gap: 0.75rem;
        align-items: stretch;
    }
    
    .filter-row.show { display: flex; }
    
    .filter-group {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
        padding: 0.75rem;
        background: var(--color-gray-50);
        border-radius: var(--radius-lg);
    }
    
    .filter-label {
        font-size: 0.8125rem;
        color: var(--color-gray-500);
        text-transform: uppercase;
        letter-spacing: 0.05em;
    }
    
    .filter-chips {
        display: flex;
        flex-wrap: wrap;
        gap: var(--spacing-sm);
        width: 100%;
    }
    
    .filter-chip {
        padding: var(--spacing-sm) 0.875rem;
        font-size: 0.8125rem;
    }
    
    .subject-menu {
        position: fixed;
        top: auto;
        bottom: 0;
        left: 0;
        right: 0;
        border-radius: var(--radius-xl) var(--radius-xl) 0 0;
        max-height: 60vh;
        overflow-y: auto;
        padding: var(--spacing-md);
        z-index: 250;
    }
    
    /* Active filters */
    .active-filters {
        margin-top: 0.75rem;
        padding-top: 0.75rem;
        gap: 0.375rem;
    }
    
    .active-filter-tag {
        font-size: 0.75rem;
        padding: 0.25rem 0.375rem 0.25rem 0.625rem;
    }
    
    /* Content grid */
    .content-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.875rem;
    }
    
    .card-body { padding: 0.75rem; }
    .card-title { font-size: 0.875rem; }
    .card-rating { margin-bottom: 0.375rem; }
    .stars { font-size: 0.75rem; }
    .rating-text { font-size: 0.6875rem; }
    .card-meta { font-size: 0.75rem; }
    
    /* Player */
    .player-title { font-size: 1rem; }
}

@media (max-width: 480px) {
    .logo-text { font-size: 1.25rem; }
    .logo-icon { width: 32px; height: 32px; font-size: 1rem; }
    
    .content-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.625rem;
        padding: var(--spacing-sm) 0.625rem var(--spacing-2xl);
    }
    
    .card-thumbnail { aspect-ratio: 4/3; }
    .card-type-badge { 
        font-size: 0.5625rem; 
        padding: 0.1875rem var(--spacing-sm);
    }
    .card-body { padding: 0.625rem; }
    .card-title { 
        font-size: 0.8125rem; 
        -webkit-line-clamp: 1;
        margin-bottom: 0.25rem;
    }
    .card-rating { margin-bottom: 0.25rem; }
    .card-meta { display: none; }
    
    .filter-chip {
        padding: 0.375rem 0.625rem;
        font-size: 0.75rem;
    }
    
    .footer-inner { gap: 0.75rem var(--spacing-lg); }
    .footer-link { font-size: 0.8125rem; }
    
    /* Modal */
    .modal-body { padding: var(--spacing-md); }
    .modal-title { font-size: 1.25rem; }
}

/* ============================================================
   CHILD SELECTOR - HEADER DROPDOWN (Desktop)
   ============================================================ */

.child-selector {
    position: relative;
    display: none;
}

.child-selector-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.375rem 0.625rem 0.375rem 0.375rem;
    background: white;
    border: 2px solid var(--color-gray-200);
    border-radius: 9999px;
    cursor: pointer;
    transition: all 0.15s;
    font-family: inherit;
    font-size: 0.875rem;
    color: var(--color-gray-700);
}

.child-selector-btn:hover {
    border-color: var(--color-primary);
}

.child-selector.open .child-selector-btn {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.child-avatar-mini {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    flex-shrink: 0;
}

.child-name-mini {
    font-weight: 600;
    max-width: 80px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.dropdown-arrow {
    transition: transform 0.2s;
    opacity: 0.5;
}

.child-selector.open .dropdown-arrow {
    transform: rotate(180deg);
}

.child-selector-dropdown {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    width: 200px;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 40px rgba(0,0,0,0.15);
    border: 1px solid var(--color-gray-200);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.2s;
    z-index: 1000;
    overflow: hidden;
}

.child-selector.open .child-selector-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.child-selector-header {
    padding: 0.625rem 1rem 0.375rem;
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-gray-500);
    background: var(--color-gray-50);
}

.child-option {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    width: 100%;
    padding: 0.5rem 1rem;
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.875rem;
    color: var(--color-gray-700);
    text-align: left;
    transition: background 0.1s;
    text-decoration: none;
}

.child-option:hover {
    background: var(--color-gray-50);
}

.child-option.active {
    background: rgba(37, 99, 235, 0.08);
    color: var(--color-primary);
}

.child-option-name {
    flex: 1;
    font-weight: 500;
}

.check-icon {
    color: var(--color-primary);
    flex-shrink: 0;
}

.add-child-option {
    border-top: 1px solid var(--color-gray-100);
}

.add-child-option .child-avatar-mini {
    background: var(--color-gray-100);
    color: var(--color-gray-500);
    font-size: 0.875rem;
    font-weight: 600;
}

.add-child-option:hover .child-avatar-mini {
    background: var(--color-primary);
    color: white;
}

/* Show desktop child selector on larger screens */
@media (min-width: 769px) {
    .child-selector {
        display: block;
    }
}

/* ============================================================
   CHILD SELECTOR - MOBILE MENU
   ============================================================ */

.mobile-child-selector {
    padding: 1rem;
    background: linear-gradient(135deg, #FEF3C7 0%, #FDE68A 100%);
    border-radius: var(--radius-lg);
    margin: 0 1rem 0.5rem;
}

.mobile-child-label {
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-gray-600);
    margin-bottom: 0.625rem;
}

.mobile-child-options {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

.mobile-child-option {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    padding: 0.5rem 0.75rem;
    background: white;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-gray-700);
    transition: all 0.15s;
}

.mobile-child-option:hover {
    border-color: var(--color-gray-300);
}

.mobile-child-option.active {
    border-color: var(--color-primary);
    background: rgba(37, 99, 235, 0.05);
    color: var(--color-primary);
}

.mobile-child-option .check-icon {
    margin-left: auto;
}

/* ============================================================
   CHILD SELECTOR - CONTENT MODAL & PAGE
   ============================================================ */

.modal-child-selector,
.page-child-selector {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background: linear-gradient(135deg, #FEF3C7 0%, #FDE68A 100%);
    border-radius: var(--radius-lg);
    margin-bottom: 1rem;
}

.modal-child-label,
.page-child-label {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--color-gray-700);
    white-space: nowrap;
}

.modal-child-dropdown,
.page-child-dropdown {
    position: relative;
    flex: 1;
}

.modal-child-btn,
.page-child-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    background: white;
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-gray-700);
    transition: all 0.15s;
    width: 100%;
}

.modal-child-btn:hover,
.page-child-btn:hover {
    border-color: var(--color-primary);
}

.modal-child-name,
.page-child-name {
    flex: 1;
    text-align: left;
}

.modal-child-options,
.page-child-options {
    position: absolute;
    top: calc(100% + 0.5rem);
    left: 0;
    right: 0;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 40px rgba(0,0,0,0.15);
    border: 1px solid var(--color-gray-200);
    display: none;
    z-index: 100;
    overflow: hidden;
}

.modal-child-dropdown.open .modal-child-options,
.page-child-dropdown.open .page-child-options {
    display: block;
}

.modal-child-option,
.page-child-option {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    width: 100%;
    padding: 0.625rem 1rem;
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.875rem;
    color: var(--color-gray-700);
    text-align: left;
    transition: background 0.1s;
}

.modal-child-option:hover,
.page-child-option:hover {
    background: var(--color-gray-50);
}

.modal-child-option.active,
.page-child-option.active {
    background: rgba(37, 99, 235, 0.08);
    color: var(--color-primary);
}

.modal-child-option .check-icon,
.page-child-option .check-icon {
    margin-left: auto;
}

/* Ensure modal actions stack properly */
.modal-actions {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.modal-actions .modal-child-selector {
    margin-bottom: 1rem;
}

.modal-actions .btn {
    width: 100%;
}