/**
 * WASC - Modern & Elegant Design
 * Premium Academic Website Design
 */

/* ===== Import Fonts ===== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Playfair+Display:wght@600;700;800&display=swap');

/* ===== CSS Variables ===== */
:root {
    /* Colors */
    --primary-color: #1a237e;
    --primary-light: #3949ab;
    --primary-dark: #000051;
    --secondary-color: #0277bd;
    --secondary-light: #58a5f0;
    --secondary-dark: #004c8c;
    --accent-color: #ff6f00;
    --accent-light: #ffa040;
    --accent-dark: #c43e00;
    
    --text-primary: #212121;
    --text-secondary: #616161;
    --text-light: #9e9e9e;
    
    --bg-primary: #ffffff;
    --bg-secondary: #fafafa;
    --bg-tertiary: #f5f5f5;
    
    --success: #2e7d32;
    --error: #c62828;
    --warning: #f57c00;
    --info: #0288d1;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.15);
    
    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 24px;
    --radius-full: 9999px;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Playfair Display', serif;
    font-weight: 700;
    line-height: 1.2;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

h1 { font-size: clamp(2.5rem, 5vw, 3.5rem); }
h2 { font-size: clamp(2rem, 4vw, 2.75rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1.125rem; }

p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
    font-weight: 400;
}

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

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

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    font-family: 'Inter', sans-serif;
    font-size: 0.9375rem;
    font-weight: 600;
    line-height: 1;
    text-align: center;
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(26, 35, 126, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(26, 35, 126, 0.4);
    color: white;
}

.btn-secondary {
    background: white;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

.btn-large {
    padding: 1.125rem 2.5rem;
    font-size: 1.0625rem;
}

.btn-link {
    color: var(--secondary-color);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: gap var(--transition-base);
}

.btn-link:hover {
    gap: 0.75rem;
    color: var(--secondary-dark);
}

/* ===== Alerts ===== */
.alert {
    padding: 1rem 1.5rem;
    margin-bottom: var(--spacing-md);
    border-radius: var(--radius-lg);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 1rem;
    animation: slideDown 0.4s ease;
}

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

.alert-success {
    background: linear-gradient(135deg, #e8f5e9 0%, #c8e6c9 100%);
    color: var(--success);
    border-left: 4px solid var(--success);
}

.alert-error {
    background: linear-gradient(135deg, #ffebee 0%, #ffcdd2 100%);
    color: var(--error);
    border-left: 4px solid var(--error);
}

/* ===== Header ===== */
.site-header {
    background: white;
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-circle {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-family: 'Playfair Display', serif;
    font-size: 1.75rem;
    font-weight: 700;
    box-shadow: var(--shadow-lg);
}

.logo-text h1 {
    font-size: 1.5rem;
    margin-bottom: 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-subtitle {
    font-size: 0.75rem;
    color: var(--text-light);
    font-weight: 500;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    margin-top: 0.25rem;
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.language-switcher {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--bg-tertiary);
    padding: 0.5rem;
    border-radius: var(--radius-full);
}

.language-switcher a {
    padding: 0.5rem 1rem;
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-secondary);
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

.language-switcher a.active {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    box-shadow: var(--shadow-sm);
}

.language-switcher span {
    color: var(--text-light);
}

.btn-login {
    padding: 0.75rem 1.75rem;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    font-weight: 600;
    font-size: 0.9375rem;
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: var(--shadow-md);
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-login svg {
    width: 20px;
    height: 20px;
}

/* ===== Navigation ===== */
.main-nav {
    padding: 0;
}

.main-nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 0.5rem;
}

.main-nav a {
    display: block;
    padding: 1rem 1.5rem;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.9375rem;
    transition: all var(--transition-fast);
    border-radius: var(--radius-md);
    position: relative;
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: 0.5rem;
    left: 1.5rem;
    right: 1.5rem;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border-radius: var(--radius-full);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--primary-color);
    background: rgba(26, 35, 126, 0.05);
}

.main-nav a:hover::after,
.main-nav a.active::after {
    transform: scaleX(1);
}

/* ===== Mobile Menu Toggle (Hidden on Desktop) ===== */
.mobile-menu-toggle {
    display: none;
}

/* Mobile only menu items - hidden on desktop */
.main-nav .mobile-only {
    display: none;
}

/* Mobile Menu Overlay */
.mobile-menu-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

body.mobile-menu-active .mobile-menu-overlay {
    display: block;
    opacity: 1;
    visibility: visible;
}

/* ===== Hero Section ===== */
.hero-section {
    background: linear-gradient(135deg, #1a237e 0%, #0277bd 100%);
    padding: 5rem 0;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero-content h1 {
    color: white;
    font-size: clamp(2.5rem, 5vw, 4rem);
    margin-bottom: var(--spacing-md);
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    animation: fadeInUp 0.8s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-description {
    font-size: 1.25rem;
    max-width: 800px;
    margin: 0 auto var(--spacing-xl);
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.8;
    animation: fadeInUp 0.8s ease 0.2s backwards;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease 0.4s backwards;
}

/* ===== Sections ===== */
.catalog-section,
.services-section,
.announcements-section,
.cta-section {
    padding: 5rem 0;
}

.catalog-section {
    background: var(--bg-secondary);
    padding: 3rem 0;
}

.section-title {
    text-align: center;
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: var(--spacing-xl);
    position: relative;
    padding-bottom: var(--spacing-md);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border-radius: var(--radius-full);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
}

.section-header .section-title {
    margin-bottom: 0;
    text-align: left;
}

.section-header .section-title::after {
    left: 0;
    transform: translateX(0);
}

/* ===== Catalog Boxes ===== */
.catalog-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
}

.catalog-box {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    border: 2px solid transparent;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.catalog-box:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--secondary-color);
}

.catalog-image {
    position: relative;
    width: 100%;
    height: 200px;
    overflow: hidden;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
}

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

.catalog-box:hover .catalog-image img {
    transform: scale(1.1);
}

.catalog-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(26, 35, 126, 0.8) 0%, rgba(2, 119, 189, 0.8) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.catalog-box:hover .catalog-overlay {
    opacity: 1;
}

.catalog-icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transform: scale(0.8);
    transition: transform var(--transition-base);
}

.catalog-box:hover .catalog-icon {
    transform: scale(1) rotate(5deg);
}

.catalog-content {
    padding: var(--spacing-lg);
    text-align: center;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.catalog-content h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-color);
    line-height: 1.4;
    min-height: 2.8em;
}

.catalog-content p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    font-size: 0.9375rem;
    line-height: 1.6;
    flex: 1;
}

.catalog-link {
    color: var(--secondary-color);
    font-weight: 700;
    font-size: 0.9375rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all var(--transition-base);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.catalog-link:hover {
    color: var(--primary-color);
    gap: 0.75rem;
}

/* ===== Service Cards ===== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.service-card {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

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

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-base);
}

.service-card:hover .service-icon {
    transform: scale(1.1) rotate(5deg);
}

.service-card h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
    font-size: 1.375rem;
}

.service-card p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

/* ===== Announcement Cards ===== */
.announcements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

.announcement-card {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    transition: all var(--transition-base);
}

.announcement-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-4px);
}

.announcement-date {
    min-width: 90px;
    text-align: center;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    justify-content: center;
    box-shadow: var(--shadow-md);
}

.date-day {
    font-size: 2.5rem;
    font-weight: 800;
    display: block;
    line-height: 1;
    font-family: 'Playfair Display', serif;
}

.date-month {
    font-size: 0.875rem;
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 1px;
    margin-top: 0.25rem;
}

.announcement-content {
    flex: 1;
}

.announcement-time {
    color: var(--accent-color);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.announcement-content h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
}

.announcement-content h3 a {
    color: var(--primary-color);
    transition: color var(--transition-fast);
}

.announcement-content h3 a:hover {
    color: var(--secondary-color);
}

.announcement-content p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    font-size: 0.9375rem;
    line-height: 1.6;
}

/* ===== CTA Section ===== */
.cta-section {
    background: linear-gradient(135deg, #1a237e 0%, #0277bd 100%);
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 30% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 70% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
}

.cta-content {
    position: relative;
    z-index: 1;
}

.cta-content h2 {
    color: white;
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: var(--spacing-md);
}

.cta-content p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xl);
}

.cta-section .btn {
    background: white;
    color: var(--primary-color);
    box-shadow: var(--shadow-xl);
}

.cta-section .btn:hover {
    background: var(--accent-color);
    color: white;
}

/* ===== Moodle Courses Slider Section ===== */
.courses-section {
    padding: 4rem 0;
    background: #f8f9fa;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    font-size: 2.25rem;
    background: linear-gradient(135deg, #1a237e 0%, #0277bd 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.section-subtitle {
    font-size: 1.125rem;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

.courses-slider-wrapper {
    position: relative;
    margin-bottom: 2rem;
}

.courses-slider {
    display: flex;
    gap: 1.5rem;
    overflow-x: auto;
    overflow-y: hidden;
    scroll-behavior: smooth;
    padding: 1rem 0 2rem 0;
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* IE/Edge */
    cursor: grab;
    user-select: none;
}

.courses-slider:active {
    cursor: grabbing;
}

.courses-slider::-webkit-scrollbar {
    display: none; /* Chrome/Safari/Opera */
}

.course-card {
    flex: 0 0 320px;
    background: white;
    border-radius: 16px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    transition: all 0.3s ease;
}

.course-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.15);
}

.course-image {
    position: relative;
    height: 180px;
    overflow: hidden;
    background: linear-gradient(135deg, #1a237e 0%, #0277bd 100%);
}

.course-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

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

.course-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: rgba(255, 255, 255, 0.95);
    color: #1a237e;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.course-content {
    padding: 1.5rem;
}

.course-content h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: #1a237e;
    margin-bottom: 0.75rem;
    line-height: 1.4;
    min-height: 60px;
}

.course-summary {
    color: #666;
    font-size: 0.9375rem;
    line-height: 1.6;
    margin-bottom: 1rem;
    min-height: 75px;
}

.course-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #e0e4e8;
}

.course-date {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #666;
    font-size: 0.875rem;
}

.course-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: #0277bd;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 0.9375rem;
}

.course-link:hover {
    color: #1a237e;
    gap: 0.75rem;
}

.slider-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    background: white;
    border: 2px solid #e0e4e8;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 10;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.slider-nav:hover {
    background: #1a237e;
    border-color: #1a237e;
    color: white;
}

.slider-nav svg {
    transition: stroke 0.3s ease;
}

.slider-nav:hover svg {
    stroke: white;
}

.slider-prev {
    left: -24px;
}

.slider-next {
    right: -24px;
}

.courses-footer {
    text-align: center;
    margin-top: 2rem;
}

.empty-courses {
    text-align: center;
    padding: 4rem 2rem;
    background: white;
    border-radius: 16px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}

.empty-courses svg {
    margin-bottom: 1rem;
}

.empty-courses h3 {
    font-size: 1.5rem;
    color: #333;
    margin: 1rem 0 0.5rem 0;
    font-weight: 600;
}

.empty-courses p {
    color: #666;
    font-size: 1rem;
    line-height: 1.6;
    max-width: 500px;
    margin: 0 auto;
}

/* ===== Footer ===== */
.site-footer {
    background: linear-gradient(135deg, #1a237e 0%, #0d1b5e 100%);
    color: white;
    padding: 4rem 0 0;
    position: relative;
}

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

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-column h3 {
    color: white;
    margin-bottom: var(--spacing-md);
    font-size: 1.25rem;
}

.footer-column p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.8;
    font-size: 0.9375rem;
}

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

.footer-column ul li {
    margin-bottom: var(--spacing-sm);
}

.footer-column ul li a {
    color: rgba(255, 255, 255, 0.8);
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-column ul li a:hover {
    color: white;
    transform: translateX(5px);
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.social-links a {
    width: 48px;
    height: 48px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transition: all var(--transition-base);
    font-weight: 700;
    font-size: 1.25rem;
}

.social-links a:hover {
    background: var(--accent-color);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--spacing-lg) 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 0;
    font-size: 0.9375rem;
}

.admin-link a {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.875rem;
    transition: color var(--transition-fast);
}

.admin-link a:hover {
    color: white;
}

/* ===== Pagination ===== */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
    margin: var(--spacing-xl) 0;
}

.pagination-link,
.pagination-current {
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    font-weight: 600;
}

.pagination-link {
    color: var(--primary-color);
    background: white;
    border: 2px solid var(--primary-color);
}

.pagination-link:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.pagination-current {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    box-shadow: var(--shadow-md);
}

/* ===== Forms ===== */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9375rem;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="date"],
.form-group input[type="time"],
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.875rem 1.25rem;
    border: 2px solid var(--bg-tertiary);
    border-radius: var(--radius-lg);
    font-size: 0.9375rem;
    font-family: 'Inter', sans-serif;
    transition: all var(--transition-fast);
    background: white;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 4px rgba(2, 119, 189, 0.1);
}

.form-group textarea {
    min-height: 150px;
    resize: vertical;
}

/* ===== Utility Classes ===== */
.no-data {
    text-align: center;
    color: var(--text-light);
    padding: var(--spacing-xl);
    font-style: italic;
    font-size: 1.125rem;
}

/* ===== Modal ===== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 9999;
    display: none;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
}

.modal.active {
    display: flex;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    position: relative;
    background: white;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    width: 100%;
    max-width: 450px;
    padding: 2.5rem;
    animation: slideUp 0.4s ease;
    z-index: 1;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-close {
    position: absolute;
    top: 1.25rem;
    right: 1.25rem;
    background: var(--bg-tertiary);
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--text-secondary);
}

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

.modal-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.modal-header h2 {
    font-size: 1.875rem;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.modal-header p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    margin-bottom: 0;
}

.modal-form .form-group {
    margin-bottom: var(--spacing-md);
}

.modal-form label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9375rem;
}

.modal-form label svg {
    color: var(--secondary-color);
}

.modal-form input[type="text"],
.modal-form input[type="password"] {
    width: 100%;
    padding: 0.875rem 1.25rem;
    border: 2px solid var(--bg-tertiary);
    border-radius: var(--radius-lg);
    font-size: 0.9375rem;
    transition: all var(--transition-fast);
}

.modal-form input:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 4px rgba(2, 119, 189, 0.1);
}

.form-group-checkbox {
    margin-bottom: var(--spacing-md);
}

.form-group-checkbox label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group-checkbox input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.modal-footer-links {
    text-align: center;
    margin-top: var(--spacing-md);
}

.forgot-password {
    color: var(--secondary-color);
    font-size: 0.9375rem;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.forgot-password:hover {
    color: var(--primary-color);
}

.text-center {
    text-align: center;
}

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }