/* ===== CSS Variables ===== */
:root {
    --primary-color: #ffffff;
    --primary-dark: #e5e5e5;
    --primary-light: #f5f5f5;
    --secondary-color: #ffffff;
    --accent-color: #ffffff;
    
    --bg-dark: #000000;
    --bg-darker: #0a0a0a;
    --bg-card: #1a1a1a;
    --bg-card-hover: #252525;
    
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    
    --border-color: #333333;
    --border-light: #555555;
    
    --gradient-primary: linear-gradient(135deg, #ffffff 0%, #f5f5f5 100%);
    --gradient-secondary: linear-gradient(135deg, #ffffff 0%, #e5e5e5 100%);
    
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px rgba(255, 255, 255, 0.3);
    
    --transition: all 0.3s ease;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-full: 9999px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

/* ===== Utility Classes ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    outline: none;
}

.btn-primary {
    background: #ffffff;
    color: #000000;
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(255, 255, 255, 0.5);
}

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

.btn-secondary:hover {
    background: var(--bg-card);
    border-color: var(--primary-color);
}

.btn-light {
    background: white;
    color: var(--bg-dark);
}

.btn-light:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(15, 15, 26, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.4rem;
    font-weight: 700;
}

.nav-logo i {
    font-size: 1.6rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav-links a {
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
}

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

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
}

.btn-chat {
    background: #ffffff;
    padding: 10px 20px;
    border-radius: var(--radius-full);
    color: #000000 !important;
}

.btn-chat:hover {
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.5);
}

.nav-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 100px 20px;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(236, 72, 153, 0.15) 0%, transparent 50%);
    pointer-events: none;
}

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

.hero-text h1 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
}

.hero-text p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 30px;
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

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

.ai-orb {
    position: relative;
    width: 350px;
    height: 350px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.orb-ring {
    position: absolute;
    border-radius: 50%;
    border: 2px solid transparent;
}

.ring-1 {
    width: 100%;
    height: 100%;
    border-color: rgba(99, 102, 241, 0.3);
    animation: rotate 20s linear infinite;
}

.ring-2 {
    width: 80%;
    height: 80%;
    border-color: rgba(236, 72, 153, 0.3);
    animation: rotate 15s linear infinite reverse;
}

.ring-3 {
    width: 60%;
    height: 60%;
    border-color: rgba(6, 182, 212, 0.3);
    animation: rotate 10s linear infinite;
}

.orb-core {
    width: 120px;
    height: 120px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: var(--shadow-glow), inset 0 0 30px rgba(255, 255, 255, 0.2);
    animation: pulse 2s ease-in-out infinite;
}

.orb-core i {
    font-size: 3rem;
    color: white;
}

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

@keyframes pulse {
    0%, 100% { transform: scale(1); box-shadow: var(--shadow-glow); }
    50% { transform: scale(1.05); box-shadow: 0 0 50px rgba(99, 102, 241, 0.5); }
}

/* Hero Particles */
.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    overflow: hidden;
}

/* ===== Features Section ===== */
.features {
    padding: 100px 0;
    background: var(--bg-darker);
    position: relative;
}

.features::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-color), transparent);
}

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

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 15px;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 30px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--border-light);
    box-shadow: var(--shadow-lg);
}

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

.feature-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 20px;
}

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

.feature-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ===== About Section ===== */
.about {
    padding: 100px 0;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.about-text p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 25px;
}

.about-list {
    margin-bottom: 30px;
}

.about-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 0;
    color: var(--text-secondary);
}

.about-list i {
    color: var(--primary-color);
    font-size: 1.2rem;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 30px;
    text-align: center;
    transition: var(--transition);
}

.stat-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-glow);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 5px;
}

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

/* ===== CTA Section ===== */
.cta {
    padding: 100px 0;
    background: var(--gradient-primary);
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    animation: ctaGlow 15s linear infinite;
}

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

.cta-content {
    text-align: center;
    position: relative;
    z-index: 1;
}

.cta-content h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 15px;
}

.cta-content p {
    font-size: 1.2rem;
    opacity: 0.9;
    margin-bottom: 30px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* ===== Footer ===== */
.footer {
    background: var(--bg-darker);
    padding: 60px 0 20px;
    border-top: 1px solid var(--border-color);
}

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

.footer-brand p {
    color: var(--text-secondary);
    margin-top: 15px;
    max-width: 300px;
}

.footer-links h4 {
    font-weight: 600;
    margin-bottom: 20px;
}

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

.footer-links a {
    color: var(--text-secondary);
}

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

.footer-social h4 {
    font-weight: 600;
    margin-bottom: 20px;
}

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

.social-icons a {
    width: 40px;
    height: 40px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--text-secondary);
    transition: var(--transition);
}

.social-icons a:hover {
    background: var(--gradient-primary);
    border-color: transparent;
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
}

/* ===== Responsive Design ===== */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-text p {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg-darker);
        flex-direction: column;
        padding: 20px;
        gap: 15px;
        transform: translateY(-150%);
        transition: var(--transition);
        border-bottom: 1px solid var(--border-color);
    }
    
    .nav-links.active {
        transform: translateY(0);
    }
    
    .nav-toggle {
        display: block;
    }
    
    .hero-text h1 {
        font-size: 2.5rem;
    }
    
    .ai-orb {
        width: 250px;
        height: 250px;
    }
    
    .orb-core {
        width: 80px;
        height: 80px;
    }
    
    .orb-core i {
        font-size: 2rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .section-header h2,
    .about-text h2,
    .cta-content h2 {
        font-size: 2rem;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .social-icons {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-text h1 {
        font-size: 2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .stat-number {
        font-size: 2rem;
    }
}