/* 
 * Modern Website Styles for BNL
 * Incorporating 2024-2025 design trends
 */

/* CSS Variables for Theme Management */
:root {
    /* Light Theme Colors */
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #64748b;
    --accent-color: #f59e0b;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --border-color: #e2e8f0;
    --shadow-light: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-heavy: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-secondary: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Dark Theme Variables */
[data-theme="dark"] {
    --primary-color: #60a5fa;
    --primary-hover: #3b82f6;
    --secondary-color: #94a3b8;
    --accent-color: #f59e0b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --border-color: #334155;
    --shadow-light: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --shadow-medium: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
    --shadow-heavy: 0 20px 25px -5px rgba(0, 0, 0, 0.3);
}

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

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

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: background-color var(--transition-normal), color var(--transition-normal);
    overflow-x: hidden;
    max-width: 100vw;
}

/* Skip Link for Accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--primary-color);
    color: white;
    padding: 8px;
    z-index: 100;
    text-decoration: none;
    border-radius: 4px;
    transition: top var(--transition-normal);
}

.skip-link:focus {
    top: 6px;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-secondary);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

h1 { font-size: var(--font-size-6xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); }
h5 { font-size: var(--font-size-xl); }
h6 { font-size: var(--font-size-lg); }

p {
    margin-bottom: var(--space-md);
    color: var(--text-secondary);
}

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

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

/* Buttons */
.btn {
    display: inline-block;
    padding: var(--space-sm) var(--space-lg);
    border-radius: 8px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all var(--transition-normal);
    text-decoration: none;
    font-size: var(--font-size-sm);
    letter-spacing: 0.05em;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left var(--transition-slow);
}

.btn:hover::before {
    left: 100%;
}

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

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

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

.btn-outline:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.btn-sm {
    padding: var(--space-xs) var(--space-md);
    font-size: var(--font-size-xs);
}

/* Header Styles */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 300;
    border-bottom: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.dark-theme .header {
    background: rgba(15, 23, 42, 0.95);
}

.header.scrolled {
    background: var(--bg-primary);
    box-shadow: var(--shadow-light);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    font-size: var(--font-size-2xl);
    font-weight: 800;
    letter-spacing: -0.02em;
}

.logo a {
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--space-md);
    transition: transform var(--transition-normal);
}

.logo a:hover {
    transform: scale(1.05);
}

.logo-image {
    width: 150px;
    height: 150px;
    object-fit: contain;
    transition: all var(--transition-normal);
}

.logo a:hover .logo-image {
    filter: drop-shadow(0 0 10px rgba(37, 99, 235, 0.3));
}

.logo-text {
    color: var(--primary-color);
    font-size: var(--font-size-2xl);
    font-weight: 800;
    letter-spacing: -0.02em;
}

.logo-sub {
    font-size: var(--font-size-sm);
    font-weight: 400;
    color: var(--text-secondary);
    display: block;
    margin-top: var(--space-xs);
    border-left: 2px solid var(--primary-color);
    padding-left: var(--space-sm);
}

.main-nav {
    display: flex;
    align-items: center;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--space-lg);
}

.nav-link {
    color: var(--text-secondary);
    font-weight: 600;
    position: relative;
    padding: var(--space-sm);
    border-radius: 6px;
    transition: all var(--transition-normal);
}

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

.nav-link.active {
    color: var(--primary-color);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width var(--transition-normal);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.theme-toggle {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: var(--font-size-lg);
    cursor: pointer;
    padding: var(--space-sm);
    border-radius: 50%;
    transition: all var(--transition-normal);
}

.theme-toggle:hover {
    background-color: var(--bg-secondary);
    color: var(--primary-color);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: var(--space-xs);
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
}

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

/* Mobile Menu Overlay */
.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

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

.mobile-menu-content {
    position: absolute;
    top: 0;
    right: 0;
    width: 300px;
    height: 100%;
    background: var(--bg-primary);
    box-shadow: -5px 0 25px rgba(0, 0, 0, 0.1);
    padding: var(--space-3xl) var(--space-lg);
    transform: translateX(100%);
    transition: transform var(--transition-normal);
}

.mobile-menu-overlay.active .mobile-menu-content {
    transform: translateX(0);
}

.mobile-nav ul {
    list-style: none;
    margin-bottom: var(--space-2xl);
}

.mobile-nav li {
    margin-bottom: var(--space-lg);
}

.mobile-nav a {
    font-size: var(--font-size-2xl);
    color: var(--text-primary);
    display: block;
    padding: var(--space-sm);
    border-radius: 8px;
    transition: background-color var(--transition-normal);
}

.mobile-nav a:hover {
    background-color: var(--bg-secondary);
    color: var(--primary-color);
}

.mobile-actions {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

/* Preloader */
#preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-primary);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity var(--transition-slow);
}

.loader {
    text-align: center;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--bg-secondary);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--space-md);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

#preloader.loaded {
    opacity: 0;
    pointer-events: none;
}

/* Sections */
section {
    padding: var(--space-4xl) 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-1xl);
}

.section-title {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--space-sm);
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: 2px;
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    font-weight: 500;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.hero-text {
    max-width: 800px;
}

.hero-title {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--space-lg);
    background: linear-gradient(135deg, var(--primary-color), var(--text-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.highlight {
    position: relative;
    display: inline-block;
}

.highlight::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 0;
    width: 100%;
    height: 2px;
    background: rgba(37, 99, 235, 0.2);
    z-index: -1;
    border-radius: 4px;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-2xl);
    color: var(--text-secondary);
}

.hero-stats {
    display: flex;
    gap: var(--space-xl);
    margin-bottom: var(--space-2xl);
}

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

.stat-number {
    display: block;
    font-size: var(--font-size-3xl);
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: var(--space-xs);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.hero-buttons {
    display: flex;
    gap: var(--space-md);
}

.hero-image {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-visual {
    position: relative;
    width: 600px;
    max-width: 600px;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-heavy);
    transform: perspective(1000px) rotateY(-5deg) rotateX(5deg);
    transition: transform var(--transition-normal);
}

.hero-visual:hover {
    transform: perspective(1000px) rotateY(0deg) rotateX(0deg);
}

.hero-img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

.overlay-shape {
    position: absolute;
    top: -50px;
    right: -50px;
    width: 200px;
    height: 200px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 50%;
    opacity: 0.1;
    filter: blur(20px);
    z-index: -1;
}

/* About Section */
.about {
    background-color: var(--bg-secondary);
}

.about-intro {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--space-3xl);
}

.about-intro h3 {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--space-lg);
}

.about-intro p {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
}

.about-features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
    margin-bottom: var(--space-2xl);
}

.feature-card {
    background: var(--bg-primary);
    padding: var(--space-xl);
    border-radius: 16px;
    box-shadow: var(--shadow-light);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: rgba(37, 99, 235, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-lg);
    color: var(--primary-color);
    font-size: var(--font-size-2xl);
}

.feature-card h4 {
    margin-bottom: var(--space-md);
    font-size: var(--font-size-xl);
}

.feature-card p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.about-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    margin-bottom: var(--space-3xl);
}

.about-slider {
    max-width: 900px;
    margin: 0 auto;
}

/* Swiper Styles */
.swiper {
    width: 100%;
    height: 100%;
    border-radius: 12px;
    overflow: hidden;
}

.swiper-slide {
    position: relative;
    overflow: hidden;
}

.swiper-slide img {
    display: block;
    width: 100%;
    height: 300px;
    object-fit: cover;
}

.slide-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
    color: white;
    padding: var(--space-lg);
    font-size: var(--font-size-base);
    text-align: left;
}

.swiper-pagination-bullet {
    background: var(--primary-color);
    opacity: 0.5;
}

.swiper-pagination-bullet-active {
    opacity: 1;
    background: var(--primary-hover);
}

/* Services Section */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-xl);
    margin-bottom: var(--space-3xl);
}

.service-card {
    background: var(--bg-primary);
    padding: var(--space-xl);
    border-radius: 16px;
    box-shadow: var(--shadow-light);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

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

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

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

.service-icon {
    width: 60px;
    height: 60px;
    background: rgba(37, 99, 235, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-lg);
    color: var(--primary-color);
    font-size: var(--font-size-2xl);
}

.service-card h3 {
    margin-bottom: var(--space-md);
    font-size: var(--font-size-xl);
}

.service-card p {
    margin-bottom: var(--space-lg);
    color: var(--text-secondary);
}

.service-list {
    list-style: none;
}

.service-list li {
    padding: var(--space-xs) 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: var(--space-lg);
    font-size: var(--font-size-sm);
}

.service-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.services-cta {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    padding: var(--space-2xl);
    border-radius: 16px;
    text-align: center;
    box-shadow: var(--shadow-heavy);
}

.services-cta-content h3 {
    color: white;
    margin-bottom: var(--space-sm);
}

.services-cta-content p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 0;
}

.services-cta-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    margin-top: var(--space-lg);
    flex-wrap: wrap;
}

.services-cta-actions .btn-outline {
    border-color: white;
    color: white;
}

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

/* Facility Section */
.facility-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--space-3xl);
    align-items: center;
}

.facility-gallery {
    width: 100%;
}

.gallery-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-md);
}

.gallery-item {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-medium);
    transition: transform var(--transition-normal);
}

.gallery-item:hover {
    transform: translateY(-5px);
}

.gallery-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
}

.gallery-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
    color: white;
    padding: var(--space-md);
    font-size: var(--font-size-sm);
    text-align: left;
}

.facility-text h3 {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--space-lg);
}

.facility-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
    margin: var(--space-2xl) 0;
}

.facility-features .feature-item {
    background: none;
    box-shadow: none;
    border: none;
    padding: var(--space-md);
    border-radius: 8px;
    background: var(--bg-secondary);
}

.facility-features .feature-item i {
    background: none;
    padding: 0;
    width: auto;
    height: auto;
    font-size: var(--font-size-xl);
}

.facility-features .feature-item span {
    color: var(--text-primary);
    font-weight: 500;
}

/* Contact Section */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.info-card {
    background: var(--bg-primary);
    padding: var(--space-xl);
    border-radius: 16px;
    box-shadow: var(--shadow-light);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.info-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.info-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.info-header i {
    font-size: var(--font-size-1xl);
    color: var(--primary-color);
}

.info-header h3 {
    margin: 0;
    font-size: var(--font-size-lg);
}

.contact-map {
    position: relative;
}

.map-container {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-heavy);
}

.map-image {
    width: 100%;
    height: auto;
    display: block;
}

.map-overlay {
    position: absolute;
    bottom: var(--space-lg);
    right: var(--space-lg);
}

.map-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: var(--space-md) var(--space-lg);
    border-radius: 8px;
    font-weight: 600;
    transition: all var(--transition-normal);
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
}

.map-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
}

.routes {
    margin-top: var(--space-xl);
}

.routes h4 {
    margin-bottom: var(--space-md);
    color: var(--primary-color);
}

.route-item {
    padding: var(--space-md);
    background: var(--bg-secondary);
    border-radius: 8px;
    margin-bottom: var(--space-sm);
    border-left: 4px solid var(--primary-color);
    font-size: var(--font-size-sm);
}

.route-label {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: var(--font-size-xs);
    font-weight: 700;
    margin-right: var(--space-md);
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: var(--space-4xl) 0 var(--space-md);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--space-3xl);
    margin-bottom: var(--space-2xl);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.footer-logo-image {
    width: 40px;
    height: 40px;
    object-fit: contain;
    opacity: 0.8;
    transition: all var(--transition-normal);
}

.footer-logo:hover .footer-logo-image {
    opacity: 1;
    transform: scale(1.1);
}

.footer-logo .logo-text {
    font-size: var(--font-size-xl);
    font-weight: 800;
    color: var(--text-primary);
}

.footer-logo .logo-sub {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    border-left: 1px solid var(--border-color);
    padding-left: var(--space-sm);
}

.footer-description {
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
    line-height: 1.8;
}

.footer-contact p {
    margin-bottom: var(--space-sm);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-sm);
}

.footer-contact i {
    color: var(--primary-color);
    width: 20px;
}

.footer-links h4,
.footer-social h4 {
    margin-bottom: var(--space-lg);
    color: var(--text-primary);
    font-size: var(--font-size-lg);
}

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

.footer-links li {
    margin-bottom: var(--space-sm);
}

.footer-links a {
    color: var(--text-secondary);
    transition: color var(--transition-normal);
    font-size: var(--font-size-sm);
}

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

.social-links {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.social-links a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    color: var(--text-primary);
    border-radius: 50%;
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.social-links a:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: var(--space-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.footer-copyright i {
    color: var(--accent-color);
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: var(--space-lg);
    right: var(--space-lg);
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-lg);
    box-shadow: var(--shadow-medium);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 1000;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--primary-hover);
    transform: translateY(-3px);
    box-shadow: var(--shadow-heavy);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-text {
        max-width: 100%;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-image {
        display: none;
    }
    
    .about-content,
    .facility-content,
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }
}

@media (max-width: 768px) {
    :root {
        --font-size-6xl: 2.5rem;
        --font-size-5xl: 2rem;
        --font-size-4xl: 1.75rem;
        --font-size-3xl: 1.5rem;
    }
    
    .main-nav {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .header-actions .btn {
        display: none;
    }
    
    .about-features {
        grid-template-columns: 1fr;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .facility-features {
        grid-template-columns: 1fr;
    }
    
    .facility-stats {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--space-md);
        text-align: center;
    }
    
    section {
        padding: var(--space-3xl) 0;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-sm);
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--space-md);
    }
    
    .about-actions {
        flex-direction: column;
    }
    
    .services-cta-actions {
        flex-direction: column;
        align-items: center;
    }
}

/* Animation Classes */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Smooth Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 5px;
}

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

/* Focus States for Accessibility */
:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Selection Styles */
::selection {
    background: var(--primary-color);
    color: white;
}

/* Print Styles */
@media print {
    .header,
    .back-to-top,
    .mobile-menu-overlay,
    .theme-toggle {
        display: none !important;
    }
    
    body {
        background: white;
        color: black;
    }
    
    a {
        color: black;
        text-decoration: underline;
    }
}