/* ============================================
   Dr. Ahmed Kandel Portfolio - Stylesheet
   Modern, Responsive, Animated Design
   ============================================ */

/* ============ CSS Variables ============ */
:root {
    /* Primary Colors */
    --primary: #0d9488;
    --primary-light: #14b8a6;
    --primary-dark: #0f766e;
    --primary-gradient: linear-gradient(135deg, #0d9488 0%, #0891b2 100%);
    
    /* Secondary Colors */
    --secondary: #1e40af;
    --secondary-light: #3b82f6;
    
    /* Accent Colors */
    --accent: #f59e0b;
    --accent-light: #fbbf24;
    
    /* Neutral Colors */
    --white: #ffffff;
    --black: #0f172a;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    
    /* Background Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-dark: #0f172a;
    
    /* Typography */
    --font-primary: 'Poppins', sans-serif;
    --font-heading: 'Playfair Display', serif;
    --font-arabic: 'Cairo', sans-serif;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-primary: 0 10px 40px -10px rgba(13, 148, 136, 0.4);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Spacing */
    --section-padding: 4rem;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--gray-700);
    background-color: var(--bg-primary);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    color: var(--gray-900);
    line-height: 1.3;
}

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

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

ul {
    list-style: none;
}

button {
    border: none;
    outline: none;
    cursor: pointer;
    font-family: inherit;
}

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

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1rem;
}

.section {
    padding: var(--section-padding) 0;
}

/* ============ Preloader ============ */
#preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--white);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

#preloader.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader {
    position: relative;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.loader .pulse {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: var(--primary);
    animation: pulse 1.5s ease-out infinite;
}

.loader i {
    font-size: 2rem;
    color: var(--primary);
    z-index: 1;
    animation: heartbeat 1s ease-in-out infinite;
}

@keyframes pulse {
    0% {
        transform: scale(0.5);
        opacity: 0.8;
    }
    100% {
        transform: scale(1.5);
        opacity: 0;
    }
}

@keyframes heartbeat {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.2); }
}

/* ============ Navigation ============ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 1rem 0;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
    padding: 0.5rem 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 600;
    font-size: 1.25rem;
    color: var(--gray-900);
}

.logo-icon {
    width: 45px;
    height: 45px;
    background: var(--primary-gradient);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.25rem;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-link {
    font-weight: 500;
    color: var(--gray-600);
    position: relative;
    padding: 0.5rem 0;
}

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

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

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 5px;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--gray-700);
    border-radius: 3px;
    transition: var(--transition);
}

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

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

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

/* ============ Hero Section ============ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: 80px;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #f0fdfa 0%, #ecfeff 50%, #f0f9ff 100%);
    z-index: -1;
}

.floating-shapes {
    position: absolute;
    width: 100%;
    height: 100%;
}

.shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0.1;
}

.shape-1 {
    width: 400px;
    height: 400px;
    background: var(--primary);
    top: -100px;
    right: -100px;
    animation: float 6s ease-in-out infinite;
}

.shape-2 {
    width: 200px;
    height: 200px;
    background: var(--secondary);
    bottom: 10%;
    left: 5%;
    animation: float 8s ease-in-out infinite reverse;
}

.shape-3 {
    width: 150px;
    height: 150px;
    background: var(--accent);
    top: 30%;
    left: 10%;
    animation: float 7s ease-in-out infinite 0.5s;
}

.shape-4 {
    width: 100px;
    height: 100px;
    background: var(--primary-light);
    bottom: 20%;
    right: 10%;
    animation: float 5s ease-in-out infinite 1s;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(10deg); }
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

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

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(13, 148, 136, 0.1);
    color: var(--primary);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
    animation: slideInUp 0.5s ease forwards;
}

.hero-badge i {
    color: var(--accent);
}

.hero-title {
    margin-bottom: 1.5rem;
}

.hero-title .greeting {
    display: block;
    font-size: 1.125rem;
    font-weight: 400;
    color: var(--gray-500);
    font-family: var(--font-primary);
    margin-bottom: 0.5rem;
}

.hero-title .name {
    display: block;
    font-size: 3.5rem;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.hero-title .name-arabic {
    display: block;
    font-size: 2rem;
    font-family: var(--font-arabic);
    color: var(--primary-dark);
    font-weight: 600;
    direction: rtl;
    margin-top: 0.25rem;
}

.hero-title .specialty {
    display: block;
    font-size: 1.5rem;
    color: var(--gray-700);
    font-weight: 500;
    margin-top: 0.5rem;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--gray-600);
    max-width: 500px;
    margin-bottom: 1rem;
    line-height: 1.8;
}

.hero-description-arabic {
    font-size: 1rem;
    color: var(--gray-500);
    max-width: 500px;
    margin-bottom: 1.5rem;
    line-height: 1.8;
    font-family: var(--font-arabic);
    direction: rtl;
    text-align: right;
}

/* Arabic Text Styles */
.about-arabic {
    font-family: var(--font-arabic);
    color: var(--primary);
    font-size: 1.1rem;
    direction: rtl;
    margin-bottom: 0.75rem;
    font-weight: 600;
}

.about-arabic-desc {
    font-family: var(--font-arabic);
    color: var(--gray-500);
    font-size: 0.95rem;
    direction: rtl;
    line-height: 1.8;
    margin-bottom: 1.5rem;
    text-align: right;
}

.location-arabic {
    font-family: var(--font-arabic);
    font-size: 0.85rem;
    direction: rtl;
    margin-top: 0.5rem;
    opacity: 0.85;
}

.section-arabic {
    font-family: var(--font-arabic);
    font-size: 1.25rem;
    color: var(--primary);
    direction: rtl;
    margin-top: 0.5rem;
    font-weight: 600;
}

.hero-stats {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

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

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
    font-family: var(--font-heading);
}

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

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 50px -10px rgba(13, 148, 136, 0.5);
}

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

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

.btn-block {
    width: 100%;
}

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

.image-wrapper {
    position: relative;
    width: 100%;
    max-width: 450px;
    aspect-ratio: 3/4;
}

.image-bg {
    position: absolute;
    top: 20px;
    left: 20px;
    width: 100%;
    height: 100%;
    background: var(--primary-gradient);
    border-radius: var(--radius-xl);
    z-index: 0;
}

.image-wrapper img {
    position: relative;
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: var(--radius-xl);
    z-index: 1;
    box-shadow: var(--shadow-xl);
}

.image-decoration {
    position: absolute;
    width: 100px;
    height: 100px;
    border: 3px dashed var(--primary);
    border-radius: var(--radius-lg);
    bottom: -20px;
    right: -20px;
    z-index: 0;
    animation: spin 20s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.floating-card {
    position: absolute;
    background: var(--white);
    padding: 1rem 1.25rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 600;
    color: var(--gray-700);
    z-index: 2;
    animation: floatCard 3s ease-in-out infinite;
}

.floating-card i {
    width: 40px;
    height: 40px;
    background: var(--primary-gradient);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
}

.card-1 {
    top: 10%;
    left: -30px;
}

.card-2 {
    bottom: 15%;
    right: -20px;
    animation-delay: 0.5s;
}

@keyframes floatCard {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
}

.scroll-indicator a {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--gray-500);
    font-size: 0.875rem;
}

.mouse {
    width: 25px;
    height: 40px;
    border: 2px solid var(--gray-400);
    border-radius: 15px;
    position: relative;
}

.wheel {
    width: 4px;
    height: 8px;
    background: var(--primary);
    border-radius: 2px;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0%, 100% { opacity: 1; transform: translateX(-50%) translateY(0); }
    50% { opacity: 0; transform: translateX(-50%) translateY(15px); }
}

/* ============ Section Headers ============ */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-subtitle {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--primary);
    margin-bottom: 0.75rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 1rem;
}

.title-decoration {
    width: 80px;
    height: 4px;
    background: var(--primary-gradient);
    margin: 0 auto;
    border-radius: 2px;
    position: relative;
}

.title-decoration::before,
.title-decoration::after {
    content: '';
    position: absolute;
    width: 10px;
    height: 10px;
    background: var(--primary);
    border-radius: 50%;
    top: 50%;
    transform: translateY(-50%);
}

.title-decoration::before {
    left: -15px;
}

.title-decoration::after {
    right: -15px;
}

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

.about-content {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 4rem;
    align-items: center;
}

.about-image {
    position: relative;
}

.image-frame {
    position: relative;
    display: inline-block;
}

.image-frame img {
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    max-width: 400px;
}

.experience-badge {
    position: absolute;
    bottom: -20px;
    right: -20px;
    background: var(--primary-gradient);
    color: var(--white);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.experience-badge .years {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1;
}

.experience-badge .text {
    font-size: 0.875rem;
    line-height: 1.3;
}

.about-info h3 {
    font-size: 1.75rem;
    margin-bottom: 1rem;
}

.about-info .lead {
    font-size: 1.125rem;
    color: var(--gray-600);
    margin-bottom: 1rem;
}

.about-info p {
    margin-bottom: 1.5rem;
}

.credentials {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.credential-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem;
    background: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.credential-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.credential-icon {
    width: 50px;
    height: 50px;
    background: var(--primary-gradient);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.25rem;
    flex-shrink: 0;
}

.credential-info h4 {
    font-size: 1rem;
    font-family: var(--font-primary);
    margin-bottom: 0.25rem;
}

.credential-info p {
    font-size: 0.875rem;
    color: var(--gray-500);
    margin: 0;
}

/* ============ Experience Section ============ */
.experience {
    background: var(--bg-secondary);
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding-left: 30px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--primary-gradient);
    border-radius: 3px;
}

.timeline-item {
    position: relative;
    padding-bottom: 2rem;
    padding-left: 30px;
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-marker {
    position: absolute;
    left: -36px;
    top: 0;
    width: 16px;
    height: 16px;
    background: var(--primary);
    border-radius: 50%;
    border: 3px solid var(--white);
    box-shadow: var(--shadow);
}

.timeline-content {
    background: var(--white);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.timeline-content:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow-lg);
}

.timeline-date {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary);
    background: rgba(13, 148, 136, 0.1);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    margin-bottom: 0.5rem;
}

.timeline-content h4 {
    font-size: 1.1rem;
    font-family: var(--font-primary);
    color: var(--gray-800);
    margin-bottom: 0.25rem;
}

.timeline-content p {
    font-size: 0.95rem;
    color: var(--gray-500);
    margin: 0;
}

@media (max-width: 768px) {
    .timeline {
        padding-left: 20px;
    }
    
    .timeline-item {
        padding-left: 20px;
    }
    
    .timeline-marker {
        left: -26px;
        width: 12px;
        height: 12px;
    }
}

/* ============ Services Section ============ */
.services {
    background: var(--bg-primary);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

.service-card {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    text-align: center;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid var(--gray-100);
}

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

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

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

.service-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, rgba(13, 148, 136, 0.1) 0%, rgba(8, 145, 178, 0.1) 100%);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--primary);
    transition: var(--transition);
}

.service-card:hover .service-icon {
    background: var(--primary-gradient);
    color: var(--white);
    transform: scale(1.1) rotate(5deg);
}

.service-card h3 {
    font-size: 1.125rem;
    font-family: var(--font-primary);
    margin-bottom: 0.75rem;
}

.service-card p {
    font-size: 0.9rem;
    color: var(--gray-500);
    margin-bottom: 1rem;
}

.service-hover {
    opacity: 0;
    transform: translateY(10px);
    transition: var(--transition);
}

.service-card:hover .service-hover {
    opacity: 1;
    transform: translateY(0);
}

.service-link {
    color: var(--primary);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.service-link:hover {
    gap: 0.75rem;
}

/* ============ Gallery Section ============ */
.gallery {
    background: var(--bg-secondary);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.gallery-item {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
    background: var(--gray-100);
}

.gallery-item img {
    width: 100%;
    height: auto;
    object-fit: contain;
    transition: var(--transition-slow);
}

.gallery-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to top, rgba(15, 23, 42, 0.9) 0%, rgba(15, 23, 42, 0.3) 50%, transparent 100%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 1.5rem;
    opacity: 0;
    transition: var(--transition);
}

.gallery-item:hover .gallery-overlay {
    opacity: 1;
}

.gallery-item:hover img {
    transform: scale(1.1);
}

.gallery-info h4 {
    color: var(--white);
    font-size: 1.125rem;
    margin-bottom: 0.25rem;
}

.gallery-info p {
    color: var(--gray-300);
    font-size: 0.875rem;
}

.gallery-zoom {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 40px;
    height: 40px;
    background: var(--white);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    transform: scale(0);
    transition: var(--transition);
}

.gallery-item:hover .gallery-zoom {
    transform: scale(1);
}

.gallery-zoom:hover {
    background: var(--primary);
    color: var(--white);
}

/* Lightbox */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.95);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

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

.lightbox-content {
    max-width: 90%;
    max-height: 90%;
}

.lightbox-content img {
    max-width: 100%;
    max-height: 85vh;
    object-fit: contain;
    border-radius: var(--radius);
}

.lightbox-close,
.lightbox-prev,
.lightbox-next {
    position: absolute;
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.25rem;
    transition: var(--transition);
}

.lightbox-close {
    top: 2rem;
    right: 2rem;
}

.lightbox-prev {
    left: 2rem;
    top: 50%;
    transform: translateY(-50%);
}

.lightbox-next {
    right: 2rem;
    top: 50%;
    transform: translateY(-50%);
}

.lightbox-close:hover,
.lightbox-prev:hover,
.lightbox-next:hover {
    background: var(--primary);
}

/* ============ Video Showcase Section ============ */
.video-showcase {
    background: linear-gradient(135deg, var(--gray-900) 0%, var(--gray-800) 100%);
    color: var(--white);
}

.video-showcase .section-subtitle {
    color: var(--primary-light);
}

.video-showcase .section-title {
    color: var(--white);
}

.video-showcase .title-decoration {
    background: var(--primary-gradient);
}

.video-showcase .title-decoration::before,
.video-showcase .title-decoration::after {
    background: var(--primary-light);
}

.video-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
    align-items: center;
    max-width: 900px;
    margin: 0 auto;
}

.video-wrapper {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.5);
}

.video-wrapper video {
    width: 100%;
    height: auto;
    display: block;
    border-radius: var(--radius-xl);
}

.video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.video-overlay.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.play-btn {
    width: 80px;
    height: 80px;
    background: var(--primary-gradient);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 10px 40px rgba(13, 148, 136, 0.5);
}

.play-btn:hover {
    transform: scale(1.1);
}

.play-btn i {
    margin-left: 5px;
}

.video-info h3 {
    font-size: 1.75rem;
    color: var(--white);
    margin-bottom: 1rem;
}

.video-info p {
    font-size: 1.1rem;
    color: var(--gray-300);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.video-features {
    display: grid;
    gap: 1rem;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1rem;
}

.feature-item i {
    color: var(--primary-light);
    font-size: 1.25rem;
}

@media (max-width: 992px) {
    .video-content {
        grid-template-columns: 1fr;
    }
    
    .video-info {
        text-align: center;
    }
    
    .video-features {
        max-width: 400px;
        margin: 0 auto;
    }
    
    .feature-item {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .play-btn {
        width: 60px;
        height: 60px;
        font-size: 1.25rem;
    }
}

/* ============ Research Section ============ */
.research {
    background: var(--bg-primary);
}

.research-intro {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 3rem;
    font-size: 1.125rem;
    color: var(--gray-600);
}

.research-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.research-card {
    display: flex;
    gap: 1.5rem;
    padding: 2rem;
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-100);
    transition: var(--transition);
}

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

.research-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-gradient);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.5rem;
    flex-shrink: 0;
}

.research-content {
    flex: 1;
}

.research-type {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--primary);
    background: rgba(13, 148, 136, 0.1);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    margin-bottom: 0.75rem;
}

.research-content h3 {
    font-size: 1.125rem;
    font-family: var(--font-primary);
    margin-bottom: 0.5rem;
}

.research-content p {
    font-size: 0.9rem;
    color: var(--gray-500);
    margin-bottom: 1rem;
}

.research-meta {
    display: flex;
    gap: 1.5rem;
    font-size: 0.8rem;
    color: var(--gray-400);
}

.research-meta span {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.research-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    padding: 2.5rem 2rem;
    background: var(--primary-gradient);
    border-radius: var(--radius-xl);
    flex-wrap: wrap;
}

.research-stat-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    color: var(--white);
}

.research-stat-item i {
    font-size: 2.5rem;
    opacity: 1;
}

.research-stat-item .stat-text {
    text-align: left;
}

.research-stat-item .stat-number {
    font-size: 2rem;
    font-weight: 700;
    display: block;
    color: var(--white);
    line-height: 1.2;
}

.research-stat-item .stat-label {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
}

/* ============ Testimonials Section ============ */
.testimonials {
    background: var(--bg-secondary);
    overflow: hidden;
}

.testimonials-slider {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
}

.testimonial-track {
    display: flex;
    transition: transform 0.5s ease;
}

.testimonial-card {
    min-width: 100%;
    padding: 3rem;
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    text-align: center;
    position: relative;
}

.testimonial-stars {
    margin-bottom: 1.5rem;
}

.testimonial-stars i {
    color: var(--accent);
    font-size: 1.25rem;
}

.testimonial-text {
    font-size: 1.25rem;
    color: var(--gray-600);
    line-height: 1.8;
    font-style: italic;
    margin-bottom: 2rem;
}

.testimonial-author {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.author-avatar {
    width: 60px;
    height: 60px;
    background: var(--primary-gradient);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.5rem;
}

.author-info h4 {
    font-size: 1.125rem;
    font-family: var(--font-primary);
}

.author-info span {
    font-size: 0.875rem;
    color: var(--gray-500);
}

.quote-icon {
    position: absolute;
    top: 2rem;
    right: 2rem;
    font-size: 3rem;
    color: var(--gray-100);
}

.slider-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    margin-top: 2rem;
}

.slider-btn {
    width: 45px;
    height: 45px;
    border-radius: var(--radius-full);
    background: var(--white);
    color: var(--gray-600);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.slider-dots {
    display: flex;
    gap: 0.5rem;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--gray-300);
    cursor: pointer;
    transition: var(--transition);
}

.dot.active {
    background: var(--primary);
    width: 30px;
    border-radius: 10px;
}

/* ============ Contact Section ============ */
.contact {
    background: var(--bg-primary);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.info-card {
    background: var(--primary-gradient);
    padding: 2.5rem;
    border-radius: var(--radius-xl);
    color: var(--white);
    height: 100%;
}

.info-card h3 {
    color: var(--white);
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.info-card > p {
    opacity: 0.9;
    margin-bottom: 2rem;
}

.info-items {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.info-item {
    display: flex;
    gap: 1rem;
}

.info-icon {
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.info-text h4 {
    color: var(--white);
    font-size: 1rem;
    font-family: var(--font-primary);
    margin-bottom: 0.25rem;
}

.info-text p {
    opacity: 0.9;
    font-size: 0.9rem;
}

.info-text a {
    color: var(--white);
}

.info-text a:hover {
    text-decoration: underline;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-link {
    width: 45px;
    height: 45px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.125rem;
    transition: var(--transition);
}

.social-link:hover {
    background: var(--white);
    color: var(--primary);
    transform: translateY(-3px);
}

/* Contact Form */
.contact-form-wrapper {
    background: var(--white);
    padding: 2.5rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

.contact-form h3 {
    font-size: 1.5rem;
    margin-bottom: 2rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
    position: relative;
}

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--gray-700);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius);
    background: var(--white);
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(13, 148, 136, 0.1);
}

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

/* Map */
.map-wrapper {
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.map-wrapper iframe {
    display: block;
}

/* ============ Footer ============ */
.footer {
    background: var(--gray-900);
    color: var(--gray-300);
    position: relative;
}

.footer-content {
    padding: 3rem 0 1.5rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 1rem;
}

.footer-logo i {
    font-size: 1.5rem;
    color: var(--primary);
}

.footer-col p {
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.footer-social {
    display: flex;
    gap: 0.75rem;
}

.footer-social a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.footer-social a:hover {
    background: var(--primary);
    color: var(--white);
}

.footer-col h4 {
    color: var(--white);
    font-size: 1.125rem;
    font-family: var(--font-primary);
    margin-bottom: 1.5rem;
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-col ul li a {
    color: var(--gray-400);
    transition: var(--transition);
}

.footer-col ul li a:hover {
    color: var(--primary);
    padding-left: 5px;
}

.contact-list li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

.contact-list i {
    color: var(--primary);
    margin-top: 3px;
}

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: var(--gray-500);
    font-size: 0.875rem;
}

/* ============ Back to Top ============ */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--primary-gradient);
    color: var(--white);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: var(--shadow-primary);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-5px);
}

/* ============ Animations ============ */
@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* ============ Responsive Design ============ */
@media (max-width: 1200px) {
    .services-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .gallery-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 992px) {
    :root {
        --section-padding: 4rem;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 3rem;
    }
    
    .hero-content {
        order: 2;
    }
    
    .hero-image {
        order: 1;
    }
    
    .hero-title .name {
        font-size: 2.5rem;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .image-wrapper {
        width: 300px;
        height: 380px;
        margin: 0 auto;
    }
    
    .floating-card {
        display: none;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .image-frame img {
        max-width: 350px;
        margin: 0 auto;
    }
    
    .credentials {
        max-width: 500px;
        margin: 0 auto 2rem;
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .research-grid {
        grid-template-columns: 1fr;
    }
    
    .research-stats {
        flex-wrap: wrap;
        gap: 1.5rem;
        justify-content: space-around;
    }
    
    .research-stat-item {
        flex: 0 0 45%;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--white);
        flex-direction: column;
        justify-content: center;
        gap: 1.5rem;
        padding: 2rem;
        box-shadow: var(--shadow-xl);
        transition: var(--transition);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-toggle {
        display: flex;
        z-index: 1001;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .hero-title .name {
        font-size: 2rem;
    }
    
    .hero-title .specialty {
        font-size: 1.25rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem;
    }
    
    .stat-item {
        display: flex;
        align-items: center;
        gap: 0.75rem;
        text-align: left;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .gallery-grid {
        grid-template-columns: 1fr;
    }
    
    .credentials {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .research-card {
        flex-direction: column;
        text-align: center;
    }
    
    .research-stats {
        padding: 2rem;
        gap: 1.5rem;
    }
    
    .research-stat-item .stat-number {
        font-size: 2rem;
    }
    
    .testimonial-card {
        padding: 2rem 1.5rem;
    }
    
    .testimonial-text {
        font-size: 1.1rem;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-social,
    .social-links {
        justify-content: center;
    }
    
    .contact-list li {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }
    
    .hero-title .name {
        font-size: 1.75rem;
    }
    
    .image-wrapper {
        width: 250px;
        height: 320px;
    }
    
    .btn {
        padding: 0.75rem 1.5rem;
        font-size: 0.9rem;
    }
    
    .service-card {
        padding: 1.5rem;
    }
    
    .info-card {
        padding: 1.5rem;
    }
    
    .contact-form-wrapper {
        padding: 1.5rem;
    }
    
    .lightbox-prev,
    .lightbox-next {
        width: 40px;
        height: 40px;
    }
    
    .lightbox-prev {
        left: 1rem;
    }
    
    .lightbox-next {
        right: 1rem;
    }
    
    .back-to-top {
        width: 45px;
        height: 45px;
        bottom: 1.5rem;
        right: 1.5rem;
    }
}

/* ============ Print Styles ============ */
@media print {
    .navbar,
    .back-to-top,
    .scroll-indicator,
    .lightbox {
        display: none !important;
    }
    
    .hero {
        min-height: auto;
        padding: 2rem 0;
    }
    
    .section {
        padding: 2rem 0;
    }
}