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

:root {
    /* Stripe-inspired Color Palette */
    --primary-color: #635bff;
    --primary-hover: #5a54e5;
    --secondary-color: #00d4aa;
    --text-primary: #0a2540;
    --text-secondary: #425466;
    --text-muted: #8898aa;
    --background: #ffffff;
    --background-secondary: #f6f9fc;
    --background-tertiary: #e3f2fd;
    --border-color: #e6ebf1;
    --shadow-light: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-heavy: 0 8px 32px rgba(0, 0, 0, 0.12);
    --gradient-primary: linear-gradient(135deg, #635bff 0%, #00d4aa 100%);
    --gradient-secondary: linear-gradient(135deg, #f6f9fc 0%, #e3f2fd 100%);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

html {
    scroll-behavior: smooth;
}

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

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

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: all var(--transition-normal);
}

.nav.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-light);
}

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

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 700;
    font-size: var(--font-size-lg);
}

.nav-logo-img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--primary-color);
    transition: all var(--transition-normal);
}

.nav-logo-img:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(99, 91, 255, 0.3);
}

.nav-logo-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 600;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-xl);
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-normal);
}

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

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

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

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background: var(--gradient-secondary);
    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 1000 1000"><defs><radialGradient id="a" cx="50%" cy="50%" r="50%"><stop offset="0%" stop-color="%23635bff" stop-opacity="0.1"/><stop offset="100%" stop-color="%23635bff" stop-opacity="0"/></radialGradient></defs><circle cx="200" cy="200" r="300" fill="url(%23a)"/><circle cx="800" cy="800" r="400" fill="url(%23a)"/></svg>') no-repeat;
    background-size: cover;
    opacity: 0.6;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    position: relative;
    z-index: 2;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4xl);
    align-items: center;
}

.hero-text {
    animation: slideInLeft 1s ease-out;
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.hero-title-line {
    display: block;
    opacity: 0;
    animation: fadeInUp 0.8s ease-out forwards;
}

.hero-title-line:nth-child(2) {
    animation-delay: 0.2s;
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.7;
    opacity: 0;
    animation: fadeInUp 0.8s ease-out 0.4s forwards;
}

.hero-stats {
    display: flex;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
    opacity: 0;
    animation: fadeInUp 0.8s ease-out 0.6s forwards;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    font-weight: 500;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-lg);
    opacity: 0;
    animation: fadeInUp 0.8s ease-out 0.8s forwards;
}

.hero-image {
    display: flex;
    justify-content: center;
    animation: slideInRight 1s ease-out;
}

.hero-image-container {
    position: relative;
    width: 350px;
    height: 350px;
}

.hero-photo {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    border: 4px solid var(--background);
    box-shadow: var(--shadow-heavy);
    position: relative;
    z-index: 2;
    transition: transform var(--transition-slow);
}

.hero-photo:hover {
    transform: scale(1.05);
}

.hero-image-bg {
    position: absolute;
    top: -20px;
    left: -20px;
    right: -20px;
    bottom: -20px;
    background: var(--gradient-primary);
    border-radius: 50%;
    opacity: 0.2;
    animation: pulse 3s ease-in-out infinite;
}

.hero-scroll {
    position: absolute;
    bottom: var(--spacing-2xl);
    left: 50%;
    transform: translateX(-50%);
    opacity: 0;
    animation: fadeIn 1s ease-out 1.5s forwards;
}

.scroll-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
}

.scroll-text {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    font-weight: 500;
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    border-right: 2px solid var(--primary-color);
    border-bottom: 2px solid var(--primary-color);
    transform: rotate(45deg);
    animation: bounce 2s infinite;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: var(--font-size-sm);
    text-decoration: none;
    transition: all var(--transition-fast);
    cursor: pointer;
    border: none;
    position: relative;
    overflow: hidden;
}

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

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

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 91, 255, 0.4);
}

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

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

/* Section Styles */
section {
    padding: var(--spacing-3xl) 0;
}

section:first-of-type {
    padding-top: var(--spacing-4xl);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-4xl);
}

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    position: relative;
}

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

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* AI Banner */
.ai-banner {
    background: linear-gradient(135deg, #635bff 0%, #00d4aa 100%);
    padding: var(--spacing-2xl) 0;
    position: relative;
    overflow: hidden;
}

.ai-banner::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 1000 1000"><defs><pattern id="grid" width="50" height="50" patternUnits="userSpaceOnUse"><path d="M 50 0 L 0 0 0 50" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)"/></svg>');
    animation: slideGrid 20s linear infinite;
}

@keyframes slideGrid {
    0% { transform: translateX(0); }
    100% { transform: translateX(50px); }
}

.ai-banner-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-2xl);
    position: relative;
    z-index: 2;
}

.ai-banner-icon {
    font-size: 3rem;
    color: white;
    animation: pulse 2s ease-in-out infinite;
}

.ai-banner-text {
    flex: 1;
}

.ai-banner-text h3 {
    color: white;
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.ai-banner-text p {
    color: rgba(255, 255, 255, 0.9);
    font-size: var(--font-size-lg);
    margin: 0;
}

.ai-banner-cta {
    flex-shrink: 0;
}

.btn-ai {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
    font-weight: 600;
    gap: var(--spacing-sm);
}

.btn-ai:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-2px);
}

.btn-ai i {
    animation: brainPulse 1.5s ease-in-out infinite;
}

@keyframes brainPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

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

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

.about-description {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
}

/* Expertise Section - Full Width */
.expertise-section {
    padding: var(--spacing-4xl) 0;
    background: linear-gradient(135deg, var(--background-secondary) 0%, rgba(227, 242, 253, 0.5) 100%);
    position: relative;
    overflow: hidden;
}

.expertise-section::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 1000 1000"><defs><pattern id="dots" width="40" height="40" patternUnits="userSpaceOnUse"><circle cx="20" cy="20" r="1" fill="rgba(99,91,255,0.1)"/></pattern></defs><rect width="100%" height="100%" fill="url(%23dots)"/></svg>');
    opacity: 0.6;
}

/* Expertise Showcase */
.expertise-showcase {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-3xl);
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-2xl);
    perspective: 1000px;
    position: relative;
    z-index: 2;
}

.expertise-item {
    position: relative;
    background: linear-gradient(145deg, var(--background) 0%, rgba(246, 249, 252, 0.8) 100%);
    border-radius: var(--radius-xl);
    padding: var(--spacing-3xl) var(--spacing-2xl);
    overflow: hidden;
    cursor: pointer;
    transition: all 0.6s cubic-bezier(0.23, 1, 0.320, 1);
    border: 2px solid transparent;
    transform-style: preserve-3d;
    box-shadow: 
        0 10px 30px rgba(0, 0, 0, 0.1),
        0 1px 8px rgba(0, 0, 0, 0.05);
}

.expertise-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity 0.6s ease;
    z-index: 1;
    border-radius: var(--radius-xl);
}

.expertise-item::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: conic-gradient(from 0deg, transparent, rgba(99, 91, 255, 0.1), transparent);
    opacity: 0;
    transition: all 0.8s ease;
    animation: rotate 8s linear infinite;
    z-index: 0;
}

.expertise-item:hover::before {
    opacity: 0.08;
}

.expertise-item:hover::after {
    opacity: 1;
}

.expertise-item:hover {
    transform: translateY(-20px) rotateX(5deg) rotateY(5deg) scale(1.05);
    box-shadow: 
        0 30px 60px rgba(99, 91, 255, 0.25),
        0 10px 30px rgba(0, 0, 0, 0.15);
    border-color: var(--primary-color);
}

.expertise-visual {
    position: relative;
    display: flex;
    justify-content: center;
    margin-bottom: var(--spacing-2xl);
    height: 140px;
    align-items: center;
    z-index: 2;
}

.expertise-icon-container {
    position: relative;
    width: 100px;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: 50%;
    font-size: 2.5rem;
    color: white;
    z-index: 3;
    transition: all 0.6s cubic-bezier(0.23, 1, 0.320, 1);
    box-shadow: 
        0 10px 25px rgba(99, 91, 255, 0.3),
        0 5px 15px rgba(0, 0, 0, 0.1);
}

.expertise-item:hover .expertise-icon-container {
    transform: scale(1.2) rotate(15deg) translateZ(20px);
    box-shadow: 
        0 20px 40px rgba(99, 91, 255, 0.4),
        0 10px 25px rgba(0, 0, 0, 0.15);
    animation: iconBounce 0.6s ease-out;
}

@keyframes iconBounce {
    0% { transform: scale(1.2) rotate(15deg) translateZ(20px); }
    50% { transform: scale(1.3) rotate(20deg) translateZ(25px); }
    100% { transform: scale(1.2) rotate(15deg) translateZ(20px); }
}

.expertise-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(99, 91, 255, 0.4) 0%, rgba(0, 212, 170, 0.2) 50%, transparent 70%);
    border-radius: 50%;
    opacity: 0;
    transition: all 0.8s ease;
    filter: blur(20px);
}

.expertise-item:hover .expertise-glow {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1.5);
    animation: pulseGlow 3s ease-in-out infinite;
}

@keyframes pulseGlow {
    0%, 100% { 
        transform: translate(-50%, -50%) scale(1.5);
        filter: blur(20px);
    }
    50% { 
        transform: translate(-50%, -50%) scale(1.8);
        filter: blur(25px);
    }
}

/* Icon Animations */
.icon-orbit {
    position: absolute;
    width: 120px;
    height: 120px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation: rotate 10s linear infinite;
}

.orbit-dot {
    position: absolute;
    width: 8px;
    height: 8px;
    background: white;
    border-radius: 50%;
    top: -4px;
    left: 50%;
    transform: translateX(-50%);
}

.orbit-dot:nth-child(2) {
    animation-delay: -3.33s;
    transform: translateX(-50%) rotate(120deg);
    transform-origin: 0 64px;
}

.orbit-dot:nth-child(3) {
    animation-delay: -6.66s;
    transform: translateX(-50%) rotate(240deg);
    transform-origin: 0 64px;
}

.icon-pulse {
    position: absolute;
    width: 100px;
    height: 100px;
    border: 2px solid rgba(255, 255, 255, 0.4);
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation: pulse 2s ease-in-out infinite;
}

.icon-pulse::after {
    content: '';
    position: absolute;
    width: 120px;
    height: 120px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation: pulse 2s ease-in-out infinite 0.5s;
}

.icon-network {
    position: absolute;
    width: 100px;
    height: 100px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.network-node {
    position: absolute;
    width: 6px;
    height: 6px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 50%;
    animation: networkPulse 3s ease-in-out infinite;
}

.network-node:nth-child(1) {
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
}

.network-node:nth-child(2) {
    bottom: 10px;
    left: 20px;
    animation-delay: 1s;
}

.network-node:nth-child(3) {
    bottom: 10px;
    right: 20px;
    animation-delay: 2s;
}

.network-connection {
    position: absolute;
    height: 1px;
    background: rgba(255, 255, 255, 0.4);
    animation: connectionFlow 3s ease-in-out infinite;
}

.network-connection:nth-child(4) {
    top: 16px;
    left: 50%;
    width: 30px;
    transform: translateX(-50%) rotate(45deg);
    transform-origin: left;
}

.network-connection:nth-child(5) {
    top: 16px;
    left: 50%;
    width: 30px;
    transform: translateX(-50%) rotate(-45deg);
    transform-origin: left;
    animation-delay: 1.5s;
}

@keyframes networkPulse {
    0%, 100% { opacity: 0.4; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.5); }
}

@keyframes connectionFlow {
    0%, 100% { opacity: 0.2; }
    50% { opacity: 0.8; }
}

@keyframes rotate {
    from { transform: translate(-50%, -50%) rotate(0deg); }
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Content Styles */
.expertise-content {
    position: relative;
    z-index: 2;
    text-align: center;
    transform: translateY(0);
    transition: transform 0.6s ease;
}

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

.expertise-content h4 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    transition: all 0.6s ease;
    position: relative;
}

.expertise-content h4::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: 2px;
    transition: width 0.6s ease;
}

.expertise-item:hover .expertise-content h4 {
    color: var(--primary-color);
    transform: scale(1.05);
}

.expertise-item:hover .expertise-content h4::after {
    width: 60px;
}

.expertise-content p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-xl);
    font-size: var(--font-size-lg);
    transition: all 0.6s ease;
    opacity: 0.9;
}

.expertise-item:hover .expertise-content p {
    color: var(--text-primary);
    opacity: 1;
    transform: translateY(-2px);
}

.expertise-metric {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg);
    background: rgba(99, 91, 255, 0.05);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(99, 91, 255, 0.1);
    transition: all 0.6s ease;
}

.expertise-item:hover .expertise-metric {
    background: rgba(99, 91, 255, 0.1);
    border-color: rgba(99, 91, 255, 0.2);
    transform: scale(1.05);
}

.metric-number {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    color: var(--primary-color);
    transition: all 0.6s cubic-bezier(0.23, 1, 0.320, 1);
    text-shadow: 0 2px 4px rgba(99, 91, 255, 0.2);
}

.expertise-item:hover .metric-number {
    transform: scale(1.2) rotateY(5deg);
    color: var(--secondary-color);
    text-shadow: 0 4px 8px rgba(0, 212, 170, 0.3);
    animation: numberPulse 0.6s ease-out;
}

@keyframes numberPulse {
    0% { transform: scale(1.2) rotateY(5deg); }
    50% { transform: scale(1.3) rotateY(10deg); }
    100% { transform: scale(1.2) rotateY(5deg); }
}

.metric-label {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.6s ease;
}

.expertise-item:hover .metric-label {
    color: var(--primary-color);
    transform: translateY(-2px);
}

/* Floating Particles */
.expertise-particles {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    overflow: hidden;
    z-index: 1;
}

.particle {
    position: absolute;
    width: 6px;
    height: 6px;
    background: var(--gradient-primary);
    border-radius: 50%;
    opacity: 0;
    animation: floatParticle 8s ease-in-out infinite;
    box-shadow: 0 0 10px rgba(99, 91, 255, 0.5);
}

.particle:nth-child(1) {
    top: 15%;
    left: 15%;
    animation-delay: 0s;
    background: var(--primary-color);
}

.particle:nth-child(2) {
    top: 70%;
    right: 15%;
    animation-delay: 2s;
    background: var(--secondary-color);
}

.particle:nth-child(3) {
    bottom: 25%;
    left: 25%;
    animation-delay: 4s;
    background: var(--primary-color);
}

.particle:nth-child(4) {
    top: 35%;
    right: 35%;
    animation-delay: 6s;
    background: var(--secondary-color);
}

@keyframes floatParticle {
    0%, 100% {
        opacity: 0;
        transform: translateY(0) translateX(0) scale(0) rotate(0deg);
    }
    25% {
        opacity: 0.8;
        transform: translateY(-15px) translateX(10px) scale(1) rotate(90deg);
    }
    50% {
        opacity: 1;
        transform: translateY(-30px) translateX(-5px) scale(1.2) rotate(180deg);
    }
    75% {
        opacity: 0.8;
        transform: translateY(-45px) translateX(15px) scale(1) rotate(270deg);
    }
}

.expertise-item:hover .particle {
    animation-duration: 4s;
    animation-timing-function: cubic-bezier(0.23, 1, 0.320, 1);
}

.expertise-item:hover .particle:nth-child(1) {
    animation-delay: 0s;
}

.expertise-item:hover .particle:nth-child(2) {
    animation-delay: 1s;
}

.expertise-item:hover .particle:nth-child(3) {
    animation-delay: 2s;
}

.expertise-item:hover .particle:nth-child(4) {
    animation-delay: 3s;
}

/* Timeline */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--gradient-primary);
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-3xl);
    opacity: 0;
    transform: translateY(50px);
    transition: all var(--transition-slow);
}

.timeline-item.animate {
    opacity: 1;
    transform: translateY(0);
}

.timeline-item:nth-child(odd) .timeline-content {
    margin-right: 50%;
    padding-right: var(--spacing-2xl);
    text-align: right;
}

.timeline-item:nth-child(even) .timeline-content {
    margin-left: 50%;
    padding-left: var(--spacing-2xl);
}

.timeline-item::before {
    content: attr(data-year);
    position: absolute;
    left: 50%;
    top: 0;
    transform: translateX(-50%);
    background: var(--primary-color);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: var(--font-size-sm);
    z-index: 2;
}

.timeline-content {
    background: var(--background);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-light);
    transition: all var(--transition-normal);
}

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

.timeline-header h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.company {
    display: block;
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.period {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    margin-bottom: var(--spacing-md);
}

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

.timeline-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

/* Skills Section */
.skills {
    background: var(--background-secondary);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-2xl);
}

.skill-category {
    background: var(--background);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-light);
}

.category-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

.skill-item {
    margin-bottom: var(--spacing-lg);
}

.skill-name {
    display: block;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.skill-bar {
    height: 8px;
    background: var(--border-color);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: var(--radius-sm);
    width: 0;
    transition: width 1s ease-out;
}

/* Projects Section */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-2xl);
}

.project-card {
    background: var(--background);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-light);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
}

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

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-md);
}

.project-header h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
}

.project-year {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    font-weight: 500;
    background: var(--background-secondary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
}

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

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

/* Tags */
.tag {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--background-tertiary);
    color: var(--primary-color);
    font-size: var(--font-size-xs);
    font-weight: 500;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(99, 91, 255, 0.2);
}

/* Contact Section */
.contact {
    background: var(--background-secondary);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4xl);
    max-width: 1000px;
    margin: 0 auto;
}

.contact-info h3 {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
}

.contact-info p {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-2xl);
}

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

.contact-method {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.contact-icon {
    font-size: var(--font-size-xl);
    color: var(--primary-color);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(99, 91, 255, 0.1);
    border-radius: 50%;
    transition: all var(--transition-normal);
}

.contact-method:hover .contact-icon {
    background: var(--primary-color);
    color: white;
    transform: scale(1.1);
}

.contact-text {
    color: var(--text-secondary);
    font-weight: 500;
}

.contact-form-container {
    background: var(--background);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-light);
}

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

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

.form-group label {
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.form-group input,
.form-group textarea {
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

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

/* Footer */
.footer {
    background: var(--text-primary);
    color: var(--background);
    padding: var(--spacing-2xl) 0;
}

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

.footer-links {
    display: flex;
    gap: var(--spacing-xl);
}

.footer-links a {
    color: var(--background);
    text-decoration: none;
    font-weight: 500;
    transition: opacity var(--transition-fast);
}

.footer-links a:hover {
    opacity: 0.8;
}

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

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

@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 bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0) rotate(45deg);
    }
    40% {
        transform: translateY(-10px) rotate(45deg);
    }
    60% {
        transform: translateY(-5px) rotate(45deg);
    }
}

@keyframes pulse {
    0% {
        transform: scale(1);
        opacity: 0.2;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.3;
    }
    100% {
        transform: scale(1);
        opacity: 0.2;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--background);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-medium);
        padding: var(--spacing-xl) 0;
    }

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

    .nav-toggle {
        display: flex;
    }

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

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

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

    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
        text-align: center;
    }

    .hero-title {
        font-size: var(--font-size-4xl);
    }

    .hero-stats {
        justify-content: center;
    }

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

    .hero-image-container {
        width: 280px;
        height: 280px;
    }

    .timeline::before {
        left: 20px;
    }

    .timeline-item:nth-child(odd) .timeline-content,
    .timeline-item:nth-child(even) .timeline-content {
        margin-left: 60px;
        margin-right: 0;
        padding-left: var(--spacing-lg);
        padding-right: var(--spacing-lg);
        text-align: left;
    }

    .timeline-item::before {
        left: 20px;
        transform: translateX(-50%);
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }

    .footer-content {
        flex-direction: column;
        gap: var(--spacing-lg);
        text-align: center;
    }

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }

    .nav-logo-text {
        display: none;
    }

    .nav-logo-img {
        width: 35px;
        height: 35px;
    }

    .section-title {
        font-size: var(--font-size-3xl);
    }

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

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

    .expertise-showcase {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
        padding: 0 var(--spacing-lg);
    }

    .expertise-section {
        padding: var(--spacing-3xl) 0;
    }

    .expertise-item {
        padding: var(--spacing-xl);
    }

    .expertise-visual {
        height: 100px;
        margin-bottom: var(--spacing-lg);
    }

    .expertise-icon-container {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }

    .ai-banner-content {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-lg);
    }

    .ai-banner-text h3 {
        font-size: var(--font-size-xl);
    }

    .ai-banner-text p {
        font-size: var(--font-size-base);
    }
}

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

    .hero-title {
        font-size: var(--font-size-3xl);
    }

    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-lg);
    }

    .hero-actions {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 250px;
    }

    .section-title {
        font-size: var(--font-size-2xl);
    }

    section {
        padding: var(--spacing-3xl) 0;
    }
}

/* Scroll animations */
.scroll-animate {
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.8s ease-out;
}

.scroll-animate.animate {
    opacity: 1;
    transform: translateY(0);
}

/* Loading states */
.loading {
    opacity: 0.7;
    pointer-events: none;
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .scroll-arrow {
        animation: none;
    }
    
    .hero-image-bg {
        animation: none;
    }
}