/* CSS Variables for Theme System */
:root {
    /* Light Theme Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --text-muted: #adb5bd;
    --accent-primary: #667eea;
    --accent-secondary: #764ba2;
    --border-color: #dee2e6;
    --shadow-light: rgba(0, 0, 0, 0.1);
    --shadow-medium: rgba(0, 0, 0, 0.15);
    --shadow-heavy: rgba(0, 0, 0, 0.25);
    --card-bg: #ffffff;
    --nav-bg: rgba(255, 255, 255, 0.95);
    --hero-overlay: rgba(0, 0, 0, 0.4);
}

[data-theme="dark"] {
    /* Dark Theme Colors */
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #404040;
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --text-muted: #808080;
    --accent-primary: #7c3aed;
    --accent-secondary: #a855f7;
    --border-color: #404040;
    --shadow-light: rgba(0, 0, 0, 0.3);
    --shadow-medium: rgba(0, 0, 0, 0.4);
    --shadow-heavy: rgba(0, 0, 0, 0.6);
    --card-bg: #2d2d2d;
    --nav-bg: rgba(26, 26, 26, 0.95);
    --hero-overlay: rgba(0, 0, 0, 0.6);
}

/* Enhanced Global Transitions for Theme Changes */
:root {
    --transition-duration: 0.3s;
    --transition-timing: cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    transition: 
        background-color var(--transition-duration) var(--transition-timing),
        color var(--transition-duration) var(--transition-timing),
        border-color var(--transition-duration) var(--transition-timing),
        box-shadow var(--transition-duration) var(--transition-timing),
        opacity var(--transition-duration) var(--transition-timing);
}

/* Optimized transitions for specific elements */
.navbar,
.hero,
.section,
.card,
.btn {
    transition: 
        background-color var(--transition-duration) var(--transition-timing),
        color var(--transition-duration) var(--transition-timing),
        border-color var(--transition-duration) var(--transition-timing),
        box-shadow var(--transition-duration) var(--transition-timing),
        transform 0.2s var(--transition-timing);
}

/* Smooth theme switching performance optimization */
.theme-switching * {
    transition-duration: 0.1s !important;
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    :root {
        --transition-duration: 0s;
    }
    
    * {
        transition: none !important;
        animation: none !important;
    }
    
    .theme-toggle .sun-icon,
    .theme-toggle .moon-icon {
        transition: none !important;
    }
}
/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: var(--nav-bg);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: all 0.3s ease;
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--text-primary);
    text-decoration: none;
}

.logo-icon {
    font-size: 2rem;
    animation: pulse 2s infinite;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

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

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

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    transition: width 0.3s ease;
}

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

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

/* Theme Toggle Styles */
.theme-toggle {
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 50px;
    padding: 0.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    border-color: var(--accent-primary);
    transform: scale(1.05);
}

.theme-icon {
    font-size: 1.2rem;
    position: absolute;
    transition: all 0.3s ease;
}

.sun-icon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

.moon-icon {
    opacity: 0;
    transform: rotate(180deg) scale(0.5);
}

[data-theme="dark"] .sun-icon {
    opacity: 0;
    transform: rotate(-180deg) scale(0.5);
}

[data-theme="dark"] .moon-icon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    margin: 3px 0;
    transition: 0.3s;
}

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

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
}

.gradient-text {
    background: linear-gradient(135deg, #ffeaa7 0%, #fab1a0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.9;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 20px;
}

.btn-primary, .btn-secondary {
    padding: 15px 30px;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.btn-primary {
    background: white;
    color: #667eea;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background: white;
    color: #667eea;
}

/* AI Brain Animation */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.ai-brain {
    position: relative;
    width: 300px;
    height: 300px;
}

.brain-core {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, #ffeaa7 0%, #fab1a0 100%);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

.neural-network {
    position: absolute;
    width: 100%;
    height: 100%;
}

.node {
    position: absolute;
    width: 20px;
    height: 20px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 50%;
    animation: float 3s ease-in-out infinite;
}

.node-1 {
    top: 20%;
    left: 20%;
    animation-delay: 0s;
}

.node-2 {
    top: 20%;
    right: 20%;
    animation-delay: 1s;
}

.node-3 {
    bottom: 20%;
    left: 20%;
    animation-delay: 2s;
}

.node-4 {
    bottom: 20%;
    right: 20%;
    animation-delay: 1.5s;
}

.connection {
    position: absolute;
    height: 2px;
    background: rgba(255, 255, 255, 0.6);
    animation: glow 2s ease-in-out infinite;
}

.con-1 {
    top: 30%;
    left: 30%;
    width: 40%;
    transform: rotate(45deg);
}

.con-2 {
    top: 50%;
    left: 25%;
    width: 50%;
    animation-delay: 0.5s;
}

.con-3 {
    bottom: 30%;
    right: 30%;
    width: 40%;
    transform: rotate(-45deg);
    animation-delay: 1s;
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
}

.scroll-arrow {
    width: 30px;
    height: 30px;
    border: 2px solid white;
    border-top: none;
    border-left: none;
    transform: rotate(45deg);
    animation: bounce 2s infinite;
}

/* Section Styles */
.section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 1.2rem;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

/* Medical Section */
.medical-section {
    background: #f8f9fa;
}

.medical-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 40px;
    align-items: start;
}

.medical-card {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.medical-card:hover {
    transform: translateY(-10px);
}

.card-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.card-icon i {
    font-size: 24px;
    color: white;
}

.medical-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: #333;
}

.medical-card p {
    color: #666;
    margin-bottom: 20px;
    line-height: 1.6;
}

.feature-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #555;
}

.feature-item i {
    color: #667eea;
    font-size: 14px;
}

.medical-visualization {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 20px;
    padding: 40px;
    color: white;
    position: relative;
    overflow: hidden;
}

.pulse-animation {
    position: relative;
    margin-bottom: 30px;
}

.pulse-circle {
    position: absolute;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    animation: pulse-expand 2s ease-out infinite;
}

.pulse-1 {
    width: 60px;
    height: 60px;
    top: -30px;
    left: -30px;
}

.pulse-2 {
    width: 100px;
    height: 100px;
    top: -50px;
    left: -50px;
    animation-delay: 0.5s;
}

.pulse-3 {
    width: 140px;
    height: 140px;
    top: -70px;
    left: -70px;
    animation-delay: 1s;
}

.medical-data {
    display: flex;
    flex-direction: column;
    gap: 15px;
    width: 100%;
}

.data-point {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    font-weight: 500;
}

.data-point::before {
    content: attr(data-value);
    font-size: 1.5rem;
    font-weight: 700;
    color: #ffeaa7;
}

/* Adaptive Learning Section */
.adaptive-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
    align-items: center;
}

.model-selector {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.selector-header h3 {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: #333;
}

.selector-header p {
    color: #666;
    margin-bottom: 30px;
}

.model-flow {
    display: flex;
    align-items: center;
    gap: 20px;
}

.flow-step {
    flex: 1;
    text-align: center;
}

.step-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 15px;
}

.step-icon i {
    font-size: 24px;
    color: white;
}

.flow-step h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: #333;
}

.flow-step p {
    font-size: 0.9rem;
    color: #666;
}

.flow-arrow {
    font-size: 1.5rem;
    color: #667eea;
    font-weight: bold;
}

.model-visualization {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 40px;
    border-radius: 20px;
    color: white;
}

.model-switcher {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 30px;
}

.model-option {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.model-option:hover,
.model-option.active {
    background: rgba(255, 255, 255, 0.2);
    transform: translateX(10px);
}

.model-icon {
    font-size: 1.5rem;
}

.switching-animation {
    height: 4px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 2px;
    overflow: hidden;
}

.switch-indicator {
    height: 100%;
    width: 30%;
    background: #ffeaa7;
    border-radius: 2px;
    animation: switch-slide 3s ease-in-out infinite;
}

/* Interactive Learning Section */
.interactive-section {
    background: #f8f9fa;
}

.interactive-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
}

.learning-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.learning-card:hover {
    transform: translateY(-10px);
}

.card-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 30px;
    color: white;
    display: flex;
    align-items: center;
    gap: 15px;
}

.card-header i {
    font-size: 24px;
}

.card-header h3 {
    font-size: 1.3rem;
    font-weight: 600;
}

.card-content {
    padding: 30px;
}

.card-content p {
    color: #666;
    margin-bottom: 20px;
    line-height: 1.6;
}

.task-example {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.task-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 15px;
    background: #f8f9fa;
    border-radius: 8px;
}

.task-type {
    font-weight: 600;
    color: #667eea;
}

.task-desc {
    color: #666;
    font-size: 0.9rem;
}

.progress-chart {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.chart-bar {
    position: relative;
}

.bar-label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: #333;
}

.bar-fill {
    height: 8px;
    background: #e9ecef;
    border-radius: 4px;
    position: relative;
    overflow: hidden;
}

.bar-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 4px;
    animation: fill-bar 2s ease-out;
}

.chart-bar[data-progress="85"] .bar-fill::after {
    width: 85%;
}

.chart-bar[data-progress="72"] .bar-fill::after {
    width: 72%;
}

.chart-bar[data-progress="91"] .bar-fill::after {
    width: 91%;
}

.feedback-example {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.feedback-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 15px;
    border-radius: 8px;
}

.feedback-item.positive {
    background: rgba(40, 167, 69, 0.1);
    color: #28a745;
}

.feedback-item.suggestion {
    background: rgba(23, 162, 184, 0.1);
    color: #17a2b8;
}

/* Multi-Domain Section */
.domains-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.domain-card {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border-top: 4px solid transparent;
}

.domain-card:hover {
    transform: translateY(-10px);
    border-top-color: #667eea;
}

.domain-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.domain-icon i {
    font-size: 24px;
    color: white;
}

.domain-card h3 {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: #333;
}

.domain-card p {
    color: #666;
    margin-bottom: 20px;
    line-height: 1.6;
}

.domain-features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.feature-tag {
    background: rgba(102, 126, 234, 0.1);
    color: #667eea;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

/* Solutions Section */
.solutions-section {
    background: #f8f9fa;
}

.solutions-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
    align-items: start;
}

.solution-showcase {
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

.showcase-header {
    margin-bottom: 40px;
}

.showcase-header h3 {
    font-size: 2rem;
    color: #333;
    margin-bottom: 15px;
}

.showcase-header p {
    color: #666;
    font-size: 1.1rem;
    line-height: 1.6;
}

.application-grid {
    display: grid;
    gap: 30px;
}

.application-card {
    background: #f8f9fa;
    border-radius: 15px;
    padding: 30px;
    transition: all 0.3s ease;
    border-left: 4px solid transparent;
}

.application-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
    border-left-color: #667eea;
}

.app-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.app-icon i {
    font-size: 1.5rem;
    color: white;
}

.application-card h4 {
    font-size: 1.3rem;
    color: #333;
    margin-bottom: 15px;
    font-weight: 600;
}

.application-card p {
    color: #666;
    line-height: 1.6;
    margin-bottom: 20px;
}

.app-metrics {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.metric {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

.integration-info {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 20px;
    padding: 40px;
    color: white;
    height: fit-content;
}

.integration-card h4 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    font-weight: 600;
}

.integration-card p {
    margin-bottom: 30px;
    opacity: 0.9;
    line-height: 1.6;
}

.integration-features {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.integration-features .feature-item {
    display: flex;
    align-items: center;
    gap: 15px;
}

.integration-features .feature-item i {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
}

.integration-features .feature-item span {
    font-weight: 500;
}

/* Testimonials Section */
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
}

.testimonial-card {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
    position: relative;
}

.testimonial-card:hover {
    transform: translateY(-10px);
}

.testimonial-card::before {
    content: '"';
    position: absolute;
    top: 20px;
    left: 30px;
    font-size: 4rem;
    color: #667eea;
    opacity: 0.3;
    font-family: serif;
}

.testimonial-content {
    margin-bottom: 30px;
    position: relative;
    z-index: 1;
}

.testimonial-content p {
    font-style: italic;
    color: #555;
    line-height: 1.6;
    font-size: 1.1rem;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.author-avatar {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 20px;
}

.author-info h4 {
    font-weight: 600;
    color: #333;
    margin-bottom: 5px;
}

.author-info p {
    color: #666;
    font-size: 0.9rem;
}

.testimonial-stats {
    display: flex;
    justify-content: center;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: #667eea;
}

.stat-label {
    font-size: 0.9rem;
    color: #666;
}

/* Coming Soon Section */
.coming-soon-section {
    background: linear-gradient(135deg, #2d3748 0%, #4a5568 100%);
    color: white;
    padding: 100px 0;
}

.coming-soon-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.coming-soon-text h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 25px;
    line-height: 1.2;
}

.coming-soon-text p {
    font-size: 1.2rem;
    margin-bottom: 40px;
    opacity: 0.9;
    line-height: 1.6;
}

.benefits-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.benefit-item {
    display: flex;
    align-items: center;
    gap: 20px;
}

.benefit-item i {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.benefit-item span {
    font-size: 1.1rem;
    font-weight: 500;
}

.coming-soon-form {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 40px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.coming-soon-form h3 {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 15px;
}

.coming-soon-form > p {
    margin-bottom: 30px;
    opacity: 0.9;
    line-height: 1.6;
}

.notify-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group input,
.form-group select {
    padding: 15px 20px;
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    font-size: 1rem;
    outline: none;
    transition: all 0.3s ease;
}

.form-group input::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

.form-group input:focus,
.form-group select:focus {
    border-color: #667eea;
    background: rgba(255, 255, 255, 0.15);
}

.form-group select option {
    background: #2d3748;
    color: white;
}

.notify-btn {
    padding: 15px 30px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.notify-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.3);
}

/* Footer */
.footer {
    background: #2c3e50;
    color: white;
    padding: 60px 0 20px;
}

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

.footer-section h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-section h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: #ecf0f1;
}

.footer-section p {
    color: #bdc3c7;
    line-height: 1.6;
    margin-bottom: 20px;
}

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

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section ul li a {
    color: #bdc3c7;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: #667eea;
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: rgba(102, 126, 234, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #667eea;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background: #667eea;
    color: white;
    transform: translateY(-2px);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #34495e;
    color: #bdc3c7;
}

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

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

@keyframes glow {
    0%, 100% {
        opacity: 0.6;
    }
    50% {
        opacity: 1;
        box-shadow: 0 0 20px rgba(255, 255, 255, 0.5);
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

@keyframes pulse-expand {
    0% {
        transform: scale(0);
        opacity: 1;
    }
    100% {
        transform: scale(1);
        opacity: 0;
    }
}

@keyframes switch-slide {
    0%, 33% {
        transform: translateX(0);
    }
    34%, 66% {
        transform: translateX(100%);
    }
    67%, 100% {
        transform: translateX(200%);
    }
}

@keyframes fill-bar {
    0% {
        width: 0;
    }
    100% {
        width: inherit;
    }
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 20px 0;
    }

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

    .hamburger {
        display: flex;
    }

    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }

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

    .hero-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }

    .medical-grid {
        grid-template-columns: 1fr;
    }

    .adaptive-content {
        grid-template-columns: 1fr;
    }

    .model-flow {
        flex-direction: column;
        gap: 30px;
    }

    .flow-arrow {
        transform: rotate(90deg);
    }

    .demo-container {
        grid-template-columns: 1fr;
    }

    .coming-features {
        flex-direction: column;
        gap: 20px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .section {
        padding: 60px 0;
    }

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

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

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

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

    .btn-primary, .btn-secondary {
        padding: 12px 25px;
        font-size: 0.9rem;
    }

    .medical-card, .learning-card, .domain-card, .testimonial-card {
        padding: 25px;
    }

    .demo-chat {
        height: 300px;
    }

    .ai-logo {
        width: 100px;
        height: 100px;
    }

    .ring-1 {
        width: 60px;
        height: 60px;
        top: 20px;
        left: 20px;
    }

    .ring-2 {
        width: 80px;
        height: 80px;
        top: 10px;
        left: 10px;
    }

    .ring-3 {
        width: 100px;
        height: 100px;
        top: 0;
        left: 0;
    }

    .logo-center {
        font-size: 1.5rem;
    }
}