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

:root {
    /* Color Palette - Modern Dark Theme */
    --primary-bg: #052b42;
    --secondary-bg: #0a3d5c;
    --dark-bg: #021a2a;
    --card-bg: #0d4567;
    --accent-blue: #2196F3;
    --accent-cyan: #00BCD4;
    --accent-purple: #7C4DFF;
    --text-primary: #ffffff;
    --text-secondary: #b0c4de;
    --text-muted: #8a9fb5;
    --border-color: #1a4d6f;
    --success: #4CAF50;
    --warning: #FF9800;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
}

body {
    font-family: var(--font-family);
    background-color: var(--primary-bg);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(5, 43, 66, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-sm) 0;
    z-index: 1000;
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo a {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
    text-decoration: none;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

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

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

.nav-buttons {
    display: flex;
    gap: var(--spacing-sm);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-size: 0.95rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
    color: var(--text-primary);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(33, 150, 243, 0.3);
}

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

.btn-outline:hover {
    background: var(--accent-blue);
    color: var(--text-primary);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

.btn-block {
    width: 100%;
    text-align: center;
}

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

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--primary-bg) 0%, var(--secondary-bg) 50%, var(--dark-bg) 100%);
    z-index: -1;
}

.hero-background::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(circle at 20% 50%, rgba(33, 150, 243, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(0, 188, 212, 0.1) 0%, transparent 50%);
}

#particles-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-content {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 0.8s ease;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-xl);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 0.8s ease 0.4s both;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-bottom: var(--spacing-xxl);
    animation: fadeInUp 0.8s ease 0.6s both;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xxl);
    animation: fadeInUp 0.8s ease 0.8s both;
}

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

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Section Header */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xxl);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
}

/* Features Section */
.features {
    padding: var(--spacing-xxl) 0;
    background: var(--dark-bg);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.feature-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(33, 150, 243, 0.2);
    border-color: var(--accent-blue);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.feature-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.feature-list {
    list-style: none;
    padding: 0;
}

.feature-list li {
    padding: var(--spacing-xs) 0;
    color: var(--text-muted);
    position: relative;
    padding-left: 1.5rem;
}

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

/* Example Task Section */
.example-task {
    padding: var(--spacing-xxl) 0;
    background: var(--primary-bg);
}

.task-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.task-description {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
}

.task-description h3 {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-md);
    color: var(--accent-cyan);
}

.task-description h4 {
    font-size: 1.2rem;
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.task-description p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.task-requirements ul,
.task-description ul {
    list-style: none;
    padding-left: 0;
}

.task-requirements li {
    padding: var(--spacing-xs) 0;
    color: var(--text-secondary);
}

.criteria {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.criterion {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-sm);
    background: rgba(33, 150, 243, 0.1);
    border-radius: var(--radius-sm);
}

.criterion-name {
    color: var(--text-secondary);
}

.criterion-value {
    color: var(--accent-cyan);
    font-weight: 700;
}

/* Demo Window */
.demo-window {
    background: var(--dark-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    height: fit-content;
}

.demo-header {
    background: var(--card-bg);
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.demo-title {
    font-weight: 600;
    color: var(--text-primary);
}

.demo-chat {
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.chat-message {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    max-width: 80%;
}

.chat-message.user {
    background: var(--accent-blue);
    align-self: flex-end;
    margin-left: auto;
}

.chat-message.agent {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
}

.chat-message p {
    margin-bottom: var(--spacing-sm);
}

.chat-message ul {
    margin-left: var(--spacing-md);
    color: var(--text-secondary);
}

/* Courses Section */
.courses {
    padding: var(--spacing-xxl) 0;
    background: var(--dark-bg);
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.course-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.course-card.featured {
    border: 2px solid var(--accent-blue);
    position: relative;
}

.course-card.featured::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
    border-radius: var(--radius-lg);
    z-index: -1;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.course-card:hover::before {
    opacity: 0.1;
}

.course-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(33, 150, 243, 0.2);
}

.course-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--accent-blue);
    color: var(--text-primary);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    width: fit-content;
}

.course-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.course-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    flex-grow: 1;
}

.course-info {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-md) 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.course-duration,
.course-lessons,
.course-projects {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.course-modules {
    margin-bottom: var(--spacing-md);
}

.course-modules h4 {
    font-size: 1rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.course-modules ul {
    list-style: none;
    padding: 0;
}

.course-modules li {
    padding: var(--spacing-xs) 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
    position: relative;
    padding-left: 1.5rem;
}

.course-modules li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--accent-cyan);
}

/* Technology Section */
.technology {
    padding: var(--spacing-xxl) 0;
    background: var(--primary-bg);
}

.tech-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
}

.tech-info h3 {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.tech-info p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
}

.tech-features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.tech-feature {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.tech-icon {
    font-size: 2rem;
}

.tech-feature h4 {
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.tech-feature p {
    color: var(--text-muted);
    margin: 0;
    font-size: 0.9rem;
}

.tech-models h3 {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.models-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.model-item {
    padding: var(--spacing-md);
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s ease;
}

.model-item:hover {
    border-color: var(--accent-blue);
    transform: translateX(5px);
}

.model-name {
    font-weight: 600;
    color: var(--text-primary);
}

.model-type {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* About Section */
.about {
    padding: var(--spacing-xxl) 0;
    background: var(--dark-bg);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.about-stat {
    text-align: center;
    padding: var(--spacing-md);
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.about-mission h3 {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.values-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.value-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.value-icon {
    font-size: 2rem;
}

.value-item h4 {
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.value-item p {
    color: var(--text-muted);
    margin: 0;
    font-size: 0.9rem;
}

/* CTA Section */
.cta {
    padding: var(--spacing-xxl) 0;
    background: linear-gradient(135deg, var(--primary-bg), var(--secondary-bg));
    text-align: center;
}

.cta-content {
    max-width: 800px;
    margin: 0 auto;
}

.cta-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.cta-description {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
}

/* Footer */
.footer {
    background: var(--dark-bg);
    padding: var(--spacing-xxl) 0 var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

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

.footer-section h3,
.footer-section h4 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.footer-title {
    font-size: 1.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.footer-social {
    display: flex;
    gap: var(--spacing-md);
}

.social-link {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.social-link:hover {
    color: var(--accent-cyan);
}

.footer-links {
    list-style: none;
    padding: 0;
}

.footer-links li {
    margin-bottom: var(--spacing-xs);
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-bottom p {
    margin: var(--spacing-xs) 0;
}

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

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

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.05);
        opacity: 0.8;
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 20px rgba(33, 150, 243, 0.3);
    }
    50% {
        box-shadow: 0 0 40px rgba(33, 150, 243, 0.6), 0 0 60px rgba(0, 188, 212, 0.4);
    }
}

@keyframes gradientShift {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

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

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

/* Animated Background Elements */
.hero-background::before {
    content: '';
    position: absolute;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(33, 150, 243, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    top: 10%;
    left: 10%;
    animation: float 6s ease-in-out infinite;
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(0, 188, 212, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    bottom: 10%;
    right: 10%;
    animation: float 8s ease-in-out infinite;
    animation-delay: 1s;
    pointer-events: none;
}

/* Animated Gradients */
.animated-gradient {
    background: linear-gradient(45deg, var(--accent-blue), var(--accent-cyan), var(--accent-purple), var(--accent-blue));
    background-size: 300% 300%;
    animation: gradientShift 8s ease infinite;
}

/* 3D Card Effects */
.feature-card,
.course-card {
    transform-style: preserve-3d;
    transition: all 0.5s ease;
}

.feature-card:hover,
.course-card:hover {
    transform: translateY(-10px) rotateX(5deg);
    box-shadow:
        0 20px 40px rgba(33, 150, 243, 0.3),
        0 0 0 1px rgba(33, 150, 243, 0.1);
}

/* Glow Effects */
.btn-primary {
    animation: glow 3s ease-in-out infinite;
}

.nav-logo a {
    animation: shimmer 3s ease-in-out infinite;
    background: linear-gradient(90deg,
        var(--accent-blue) 0%,
        var(--accent-cyan) 50%,
        var(--accent-blue) 100%);
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Icon Animations */
.feature-icon,
.tech-icon,
.value-icon {
    display: inline-block;
    animation: float 3s ease-in-out infinite;
}

.feature-icon:hover,
.tech-icon:hover,
.value-icon:hover {
    animation: pulse 1s ease-in-out infinite;
}

/* Particles Container */
#particles-js {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: 0;
}

/* Stat Number Animation */
.stat-number {
    animation: scaleIn 1s ease-out;
}

/* Card Hover Glow */
.feature-card::after,
.course-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(33, 150, 243, 0.1), rgba(0, 188, 212, 0.1));
    border-radius: var(--radius-lg);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
    z-index: -1;
}

.feature-card:hover::after,
.course-card:hover::after {
    opacity: 1;
}

/* Model Item Shine Effect */
.model-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.5s;
}

.model-item:hover::before {
    left: 100%;
}

/* Tech Feature Pulse */
.tech-feature {
    animation: fadeInUp 0.6s ease-out;
    animation-fill-mode: both;
}

.tech-feature:nth-child(1) { animation-delay: 0.1s; }
.tech-feature:nth-child(2) { animation-delay: 0.2s; }
.tech-feature:nth-child(3) { animation-delay: 0.3s; }
.tech-feature:nth-child(4) { animation-delay: 0.4s; }

/* Value Item Slide In */
.value-item {
    animation: slideInLeft 0.6s ease-out;
    animation-fill-mode: both;
}

.value-item:nth-child(1) { animation-delay: 0.1s; }
.value-item:nth-child(2) { animation-delay: 0.2s; }
.value-item:nth-child(3) { animation-delay: 0.3s; }
.value-item:nth-child(4) { animation-delay: 0.4s; }

/* Course Card Entrance */
.course-card {
    animation: scaleIn 0.6s ease-out;
    animation-fill-mode: both;
}

.course-card:nth-child(1) { animation-delay: 0.1s; }
.course-card:nth-child(2) { animation-delay: 0.3s; }
.course-card:nth-child(3) { animation-delay: 0.5s; }

/* Loading Shimmer for Images */
.ai-image-placeholder {
    background: linear-gradient(90deg,
        var(--card-bg) 0%,
        var(--secondary-bg) 50%,
        var(--card-bg) 100%);
    background-size: 200% 100%;
    animation: shimmer 2s ease-in-out infinite;
}

/* Mobile Menu Styles */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 2rem;
    height: 2rem;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 10001;
}

.hamburger-line {
    width: 2rem;
    height: 0.25rem;
    background: var(--text-primary);
    border-radius: 10px;
    transition: all 0.3s linear;
    position: relative;
    transform-origin: 1px;
}

.mobile-menu-toggle.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg);
}

.mobile-menu-toggle.active .hamburger-line:nth-child(2) {
    opacity: 0;
    transform: translateX(20px);
}

.mobile-menu-toggle.active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg);
}

.mobile-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    z-index: 9999;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.mobile-overlay.active {
    opacity: 1;
}

/* Improved Responsive Design */

/* Large Tablets and Small Laptops */
@media (max-width: 1024px) {
    .container {
        padding: 0 var(--spacing-md);
    }

    .tech-content,
    .about-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .footer-content {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }

    .hero-title {
        font-size: 3rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Tablets */
@media (max-width: 768px) {
    /* Navigation */
    .mobile-menu-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 75%;
        max-width: 400px;
        height: 100vh;
        background: var(--card-bg);
        padding: var(--spacing-xxl) var(--spacing-lg);
        transition: right 0.3s ease;
        z-index: 10000;
        overflow-y: auto;
        box-shadow: -5px 0 20px rgba(0, 0, 0, 0.3);
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-links {
        flex-direction: column;
        gap: var(--spacing-lg);
        margin-bottom: var(--spacing-xl);
    }

    .nav-links li {
        width: 100%;
    }

    .nav-links a {
        display: block;
        padding: var(--spacing-sm) 0;
        font-size: 1.2rem;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-buttons {
        flex-direction: column;
        gap: var(--spacing-md);
        width: 100%;
    }

    .nav-buttons .btn {
        width: 100%;
        text-align: center;
        padding: 1rem;
        font-size: 1rem;
    }

    /* Hero Section */
    .hero {
        min-height: 100vh;
        padding-top: 80px;
    }

    .hero-title {
        font-size: 2.5rem;
        line-height: 1.2;
    }

    .hero-subtitle {
        font-size: 1rem;
        line-height: 1.5;
    }

    .hero-description {
        font-size: 1rem;
    }

    .hero-buttons {
        flex-direction: column;
        width: 100%;
        gap: var(--spacing-md);
    }

    .hero-buttons .btn {
        width: 100%;
    }

    .hero-stats {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
        gap: var(--spacing-lg);
    }

    .stat-item {
        flex: 0 1 calc(33.333% - var(--spacing-lg));
    }

    .stat-number {
        font-size: 2rem;
    }

    /* Sections */
    .section-title {
        font-size: 1.8rem;
    }

    .section-subtitle {
        font-size: 1rem;
    }

    /* Features */
    .features-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .feature-card {
        padding: var(--spacing-lg);
    }

    /* Task Section */
    .task-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .demo-chat {
        padding: var(--spacing-sm);
    }

    .chat-message {
        max-width: 90%;
        padding: var(--spacing-sm);
        font-size: 0.9rem;
    }

    /* Courses */
    .courses-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .course-card {
        padding: var(--spacing-lg);
    }

    /* Technology */
    .models-list {
        gap: var(--spacing-sm);
    }

    .model-item {
        padding: var(--spacing-sm);
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    /* About */
    .about-stats {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    /* CTA */
    .cta-title {
        font-size: 1.8rem;
    }

    .cta-buttons {
        flex-direction: column;
        width: 100%;
        gap: var(--spacing-md);
    }

    .cta-buttons .btn {
        width: 100%;
    }

    /* Footer */
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

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

    .footer-social {
        justify-content: center;
    }

    /* Disable some animations on mobile */
    .hero-background::before,
    .hero::after {
        animation: none;
    }

    #mouse-trail {
        display: none;
    }
}

/* Mobile Phones */
@media (max-width: 480px) {
    :root {
        --spacing-xs: 0.25rem;
        --spacing-sm: 0.75rem;
        --spacing-md: 1rem;
        --spacing-lg: 1.5rem;
        --spacing-xl: 2rem;
        --spacing-xxl: 2.5rem;
    }

    .container {
        padding: 0 var(--spacing-sm);
    }

    /* Navigation */
    .nav-menu {
        width: 85%;
        padding: var(--spacing-xl) var(--spacing-md);
    }

    /* Hero */
    .hero {
        padding-top: 70px;
    }

    .hero-title {
        font-size: 2rem;
        margin-bottom: var(--spacing-sm);
    }

    .hero-subtitle {
        font-size: 0.9rem;
    }

    .hero-description {
        font-size: 0.95rem;
    }

    .hero-buttons .btn-large {
        padding: 0.875rem 1.5rem;
        font-size: 1rem;
    }

    .stat-item {
        flex: 0 1 100%;
    }

    .stat-number {
        font-size: 1.8rem;
    }

    .stat-label {
        font-size: 0.85rem;
    }

    /* Sections */
    .section-title {
        font-size: 1.5rem;
        margin-bottom: var(--spacing-sm);
    }

    .section-subtitle {
        font-size: 0.95rem;
    }

    .section-header {
        margin-bottom: var(--spacing-lg);
    }

    /* Cards */
    .feature-card,
    .course-card {
        padding: var(--spacing-md);
    }

    .feature-icon,
    .tech-icon,
    .value-icon {
        font-size: 2rem;
    }

    .feature-title,
    .course-title {
        font-size: 1.2rem;
    }

    .feature-description,
    .course-description {
        font-size: 0.9rem;
    }

    /* Buttons */
    .btn {
        padding: 0.75rem 1.25rem;
        font-size: 0.9rem;
    }

    .btn-large {
        padding: 0.875rem 1.5rem;
        font-size: 1rem;
    }

    /* Course Info */
    .course-info {
        flex-direction: column;
        gap: var(--spacing-xs);
        align-items: flex-start;
    }

    /* Technology */
    .tech-feature {
        padding: var(--spacing-sm);
        flex-direction: column;
        text-align: center;
    }

    .tech-icon {
        margin-bottom: var(--spacing-sm);
    }

    /* About */
    .about-mission h3 {
        font-size: 1.3rem;
    }

    .value-item {
        padding: var(--spacing-sm);
    }

    /* CTA */
    .cta {
        padding: var(--spacing-xl) 0;
    }

    .cta-title {
        font-size: 1.5rem;
    }

    .cta-description {
        font-size: 0.95rem;
    }

    /* Footer */
    .footer {
        padding: var(--spacing-xl) 0 var(--spacing-md);
    }

    .footer-content {
        gap: var(--spacing-lg);
    }

    .footer-bottom {
        font-size: 0.8rem;
    }

    /* Demo Window */
    .demo-window {
        font-size: 0.9rem;
    }

    .chat-message {
        max-width: 95%;
        padding: var(--spacing-xs) var(--spacing-sm);
    }

    /* Reduce animations for performance */
    * {
        animation-duration: 0.5s !important;
    }
}

/* Extra Small Devices */
@media (max-width: 360px) {
    .hero-title {
        font-size: 1.75rem;
    }

    .section-title {
        font-size: 1.3rem;
    }

    .btn,
    .btn-large {
        padding: 0.75rem 1rem;
        font-size: 0.875rem;
    }
}

/* Touch Device Optimizations */
@media (hover: none) and (pointer: coarse) {
    /* Make buttons and links more touch-friendly */
    .btn,
    .nav-links a,
    .social-link,
    .footer-links a {
        min-height: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    /* Disable hover effects on touch devices */
    .feature-card:hover,
    .course-card:hover {
        transform: none;
    }

    /* Reduce complex animations on touch devices */
    .feature-icon:hover,
    .tech-icon:hover,
    .value-icon:hover {
        animation: none;
    }
}