/* ========================================
   Variables - ألوان ترابية مستوحاة من المكتبة البحثية
   ======================================== */
:root {
    --bg-primary: #fefdfb;
    --bg-secondary: #f5f0ea;
    --bg-tertiary: #ebe5dd;
    --text-primary: #3d3025;
    --text-secondary: #6b5d4f;
    --text-tertiary: #9a8b7a;
    --border-color: #d4c4b0;
    --accent-primary: #a08464;
    --accent-hover: #8b7355;
    --accent-secondary: #c9b896;
    --accent-light: #f5e6d3;
    --shadow-sm: 0 1px 3px rgba(61, 48, 37, 0.08);
    --shadow-md: 0 4px 6px rgba(61, 48, 37, 0.12);
    --shadow-lg: 0 10px 25px rgba(61, 48, 37, 0.15);
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========================================
   Reset & Base Styles
   ======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Cairo', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ========================================
   Header
   ======================================== */
.header {
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    background-color: rgba(255, 255, 255, 0.9);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
}

.logo h1 {
    font-size: 28px;
    font-weight: 700;
    color: var(--accent-primary);
    margin-bottom: 2px;
}

.tagline {
    font-size: 13px;
    color: var(--text-tertiary);
    font-weight: 400;
}

.nav {
    display: flex;
    gap: 8px;
}

.nav-link {
    padding: 10px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: 15px;
    transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    background: linear-gradient(180deg, var(--accent-light) 0%, var(--bg-primary) 100%);
    padding: 60px 0 80px;
}

.hero-content {
    text-align: center;
    margin-bottom: 48px;
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    font-weight: 400;
    max-width: 700px;
    margin: 0 auto;
}

/* ========================================
   Carousel
   ======================================== */
.carousel-container {
    position: relative;
    max-width: 1400px;
    margin: 0 auto;
    padding: 60px 0;
    overflow: visible;
}

.carousel-wrapper {
    position: relative;
    height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    perspective: 1000px;
}

.carousel-slide {
    position: absolute;
    width: 600px;
    height: 400px;
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    cursor: pointer;
}

.carousel-slide.active {
    transform: translateX(0) scale(1) rotateY(0deg);
    z-index: 10;
    opacity: 1;
}

.carousel-slide.prev {
    transform: translateX(-450px) scale(0.75) rotateY(15deg);
    z-index: 5;
    opacity: 0.6;
}

.carousel-slide.next {
    transform: translateX(450px) scale(0.75) rotateY(-15deg);
    z-index: 5;
    opacity: 0.6;
}

.carousel-slide.hidden {
    transform: translateX(0) scale(0.5);
    opacity: 0;
    z-index: 1;
    pointer-events: none;
}

.carousel-slide img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
    object-position: center;
}

.carousel-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.85), transparent);
    padding: 30px;
    color: white;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.carousel-slide.active .carousel-overlay {
    opacity: 1;
}

.carousel-title {
    font-size: 26px;
    font-weight: 700;
    margin-bottom: 8px;
    color: white;
}

.carousel-description {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.6;
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.95);
    border: none;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    z-index: 10;
    box-shadow: var(--shadow-md);
}

.carousel-btn:hover {
    background: white;
    box-shadow: var(--shadow-lg);
    transform: translateY(-50%) scale(1.1);
}

.carousel-btn-prev {
    left: 40px;
}

.carousel-btn-next {
    right: 40px;
}

.carousel-indicators {
    position: absolute;
    bottom: -40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 10;
}

.indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--border-color);
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

.indicator:hover {
    background: var(--accent-secondary);
}

.indicator.active {
    background: var(--accent-primary);
    width: 32px;
    border-radius: 6px;
}

/* ========================================
   Section Styles
   ======================================== */
.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
}

/* ========================================
   Apps Section
   ======================================== */
.apps-section {
    padding: 80px 0;
    background-color: var(--bg-primary);
}

.apps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}

.app-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition);
    cursor: pointer;
}

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

.app-image {
    width: 100%;
    height: 200px;
    background: var(--bg-tertiary);
    overflow: hidden;
    position: relative;
}

.app-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.app-card:hover .app-image img {
    transform: scale(1.05);
}

.app-content {
    padding: 24px;
}

.app-content h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.app-content p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
}

.app-category {
    display: inline-block;
    padding: 4px 12px;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 12px;
}

/* ========================================
   Library Section (Main App)
   ======================================== */
.library-section {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--accent-light) 0%, var(--bg-primary) 100%);
}

.library-hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.badge {
    display: inline-block;
    padding: 6px 14px;
    background: var(--accent-primary);
    color: white;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 16px;
}

.library-title {
    font-size: 42px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.library-description {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 32px;
}

.library-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 32px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--bg-primary);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

.feature-item svg {
    color: var(--accent-primary);
    flex-shrink: 0;
}

.feature-item span {
    font-size: 15px;
    color: var(--text-primary);
    font-weight: 500;
}

.library-actions {
    display: flex;
    gap: 12px;
}

.library-image {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.library-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.library-video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    cursor: pointer;
    transition: var(--transition);
}

.library-video-overlay:hover {
    background: rgba(0, 0, 0, 0.6);
}

.library-video-overlay svg {
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.3));
}

.library-video-overlay span {
    color: white;
    font-size: 16px;
    font-weight: 600;
}

/* ========================================
   Buttons
   ======================================== */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: 'Cairo', sans-serif;
}

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

.btn-primary:hover {
    background: var(--accent-hover);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
    background: var(--bg-tertiary);
}

/* ========================================
   Books Section
   ======================================== */
.books-section {
    padding: 80px 0;
    background-color: var(--bg-secondary);
}

.books-search {
    margin-bottom: 40px;
}

.search-box {
    max-width: 600px;
    margin: 0 auto 24px;
    position: relative;
}

.search-box svg {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-tertiary);
}

.search-box input {
    width: 100%;
    padding: 14px 48px 14px 20px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 16px;
    font-family: 'Cairo', sans-serif;
    background: var(--bg-primary);
    transition: var(--transition);
}

.search-box input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(160, 132, 100, 0.15);
}

.filter-buttons {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 8px 20px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    font-family: 'Cairo', sans-serif;
    color: var(--text-secondary);
}

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

.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.book-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px;
    transition: var(--transition);
    cursor: pointer;
}

.book-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
    border-color: var(--accent-primary);
}

.book-title {
    font-size: 17px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
    line-height: 1.4;
}

.book-author {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 16px;
    font-weight: 500;
}

.book-meta {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    font-size: 14px;
    color: var(--text-tertiary);
    margin-bottom: 0;
    padding-bottom: 0;
}

.book-meta-left {
    display: flex;
    align-items: center;
    gap: 8px;
}

.book-category {
    color: var(--text-secondary);
    font-weight: 500;
}

.book-separator {
    color: var(--border-color);
}

.book-size {
    color: var(--text-tertiary);
}

.book-download-icon {
    color: var(--accent-hover);
    font-size: 18px;
    transition: var(--transition);
}

.book-card:hover .book-download-icon {
    color: var(--accent-primary);
    transform: translateY(2px);
}

/* ========================================
   About Section
   ======================================== */
.about-section {
    padding: 80px 0;
    background: var(--bg-primary);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.about-text p {
    font-size: 17px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 20px;
}

.stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 40px;
}

.stat-item {
    text-align: center;
    padding: 24px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
}

.stat-item h3 {
    font-size: 36px;
    font-weight: 700;
    color: var(--accent-primary);
    margin-bottom: 8px;
}

.stat-item p {
    font-size: 15px;
    color: var(--text-secondary);
}

.about-features {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.feature-card {
    padding: 24px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.feature-icon {
    width: 56px;
    height: 56px;
    background: var(--accent-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}

.feature-icon svg {
    color: white;
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.feature-card p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: var(--text-primary);
    color: white;
    padding: 60px 0 24px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 40px;
}

.footer-section h3 {
    font-size: 24px;
    margin-bottom: 12px;
}

.footer-section h4 {
    font-size: 18px;
    margin-bottom: 16px;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 12px;
}

.footer-section ul li a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.5);
}

/* ========================================
   Modal
   ======================================== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    max-width: 800px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    padding: 40px;
    position: relative;
    animation: modalSlideIn 0.3s ease-out;
}

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

.modal-close {
    position: absolute;
    top: 16px;
    left: 16px;
    width: 40px;
    height: 40px;
    border: none;
    background: var(--bg-secondary);
    border-radius: 50%;
    font-size: 24px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.modal-close:hover {
    background: var(--bg-tertiary);
}

.modal-video {
    max-width: 1000px;
    padding: 0;
    background: black;
}

.modal-video .modal-close {
    background: rgba(255, 255, 255, 0.9);
    z-index: 10;
}

#videoContainer {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
}

#videoContainer iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

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

.menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

.menu-toggle.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

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

.menu-toggle.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* ========================================
   Responsive Design
   ======================================== */

/* Tablets (iPad) */
@media (max-width: 1024px) {
    .container {
        padding: 0 20px;
    }
    
    .library-hero,
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .library-image {
        order: -1;
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }
    
    .apps-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }
    
    .books-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }
    
    .hero-title {
        font-size: 40px;
    }
    
    .library-title {
        font-size: 36px;
    }
    
    .section-title {
        font-size: 32px;
    }
}

/* Mobile (Phones) */
@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }
    
    .nav {
        position: fixed;
        top: 0;
        left: -100%;
        width: 280px;
        height: 100vh;
        background: var(--bg-primary);
        flex-direction: column;
        padding: 80px 24px 24px;
        gap: 4px;
        box-shadow: var(--shadow-lg);
        transition: left 0.3s ease;
        z-index: 1000;
    }
    
    .nav.active {
        left: 0;
    }
    
    .nav-link {
        width: 100%;
        padding: 14px 16px;
        font-size: 16px;
    }
    
    .container {
        padding: 0 16px;
    }
    
    .hero {
        padding: 40px 0 60px;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .logo h1 {
        font-size: 22px;
    }
    
    .tagline {
        font-size: 11px;
    }
    
    .carousel-wrapper {
        height: 350px;
    }
    
    .apps-grid,
    .books-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .library-section,
    .apps-section,
    .books-section,
    .about-section {
        padding: 60px 0;
    }
    
    .library-title {
        font-size: 28px;
    }
    
    .library-description {
        font-size: 16px;
    }
    
    .library-features {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .library-actions {
        flex-direction: column;
    }
    
    .library-actions .btn {
        width: 100%;
        justify-content: center;
    }
    
    .stats {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .stat-item h3 {
        font-size: 28px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .section-subtitle {
        font-size: 16px;
    }
    
    .filter-buttons {
        gap: 8px;
    }
    
    .filter-btn {
        font-size: 13px;
        padding: 6px 16px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .footer {
        padding: 40px 0 20px;
    }
    
    .modal-content {
        padding: 24px;
        margin: 16px;
    }
}

/* Small phones */
@media (max-width: 480px) {
    .hero-title {
        font-size: 26px;
    }
    
    .hero-subtitle {
        font-size: 14px;
    }
    
    .library-title {
        font-size: 24px;
    }
    
    .section-title {
        font-size: 24px;
    }
    
    .logo h1 {
        font-size: 18px;
    }
    
    .tagline {
        display: none;
    }
    
    .carousel-slide {
        width: 100%;
        height: 300px;
    }
}

/* ========================================
   Stats Section
   ======================================== */
.stats-section {
    padding: 80px 0;
    background: var(--bg-primary);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-top: 40px;
}

.stat-card {
    background: linear-gradient(135deg, var(--accent-light) 0%, var(--bg-secondary) 100%);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-primary);
}

.stat-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-hover) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 32px;
    box-shadow: 0 4px 12px rgba(160, 132, 100, 0.3);
}

.stat-number {
    font-size: 42px;
    font-weight: 800;
    color: var(--accent-primary);
    margin-bottom: 8px;
    line-height: 1;
}

.stat-label {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.stat-description {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Categories Section */
.categories-section {
    background: var(--bg-secondary);
    padding: 60px 0;
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-top: 32px;
}

.category-badge {
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px 16px;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
}

.category-badge:hover {
    background: var(--accent-light);
    border-color: var(--accent-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.category-badge i {
    font-size: 32px;
    color: var(--accent-primary);
    margin-bottom: 12px;
    display: block;
}

.category-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

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

@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .stat-number {
        font-size: 36px;
    }
    
    .categories-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 12px;
    }
}

/* ========================================
   Utility Classes
   ======================================== */
.text-center {
    text-align: center;
}

.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }

.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }