/* ================================
   CSS Variables & Design Tokens
   ================================ */
:root {
    /* Colors - Dark Elegant Palette */
    --color-bg-primary: #0a0a0b;
    --color-bg-secondary: #111113;
    --color-bg-tertiary: #18181b;
    --color-bg-card: rgba(24, 24, 27, 0.6);
    --color-bg-card-hover: rgba(39, 39, 42, 0.6);
    
    --color-text-primary: #fafafa;
    --color-text-secondary: rgba(250, 250, 250, 0.7);
    --color-text-muted: rgba(250, 250, 250, 0.4);
    
    --color-accent: #a78bfa;
    --color-accent-glow: rgba(167, 139, 250, 0.3);
    
    --color-border: rgba(255, 255, 255, 0.08);
    --color-border-hover: rgba(255, 255, 255, 0.15);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 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: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3.5rem;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Borders & Radius */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
    
    /* Shadows */
    --shadow-glow: 0 0 60px var(--color-accent-glow);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Subtle noise texture overlay */
.noise-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    opacity: 0.03;
    z-index: 1000;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

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

/* ================================
   Hero Section
   ================================ */
.hero {
    min-height: 70vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: var(--spacing-3xl) 0;
}

.hero-content {
    text-align: center;
    max-width: 800px;
    position: relative;
    z-index: 2;
}

.tagline {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    font-weight: 400;
    letter-spacing: 0.02em;
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 0.8s ease forwards;
}

.tagline .highlight {
    color: var(--color-accent);
    font-weight: 600;
}

.headline {
    font-size: clamp(var(--font-size-4xl), 8vw, var(--font-size-5xl));
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 0.8s ease 0.1s forwards;
    opacity: 0;
}

.headline .dot {
    color: var(--color-accent);
}

.subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    line-height: 1.7;
    max-width: 580px;
    margin: 0 auto;
    animation: fadeInUp 0.8s ease 0.2s forwards;
    opacity: 0;
}

.hero-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--color-accent-glow) 0%, transparent 70%);
    opacity: 0.4;
    pointer-events: none;
    animation: pulse 8s ease-in-out infinite;
}

/* ================================
   Vision Section
   ================================ */
.vision {
    padding: var(--spacing-3xl) 0;
}

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

.vision-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    transition: all var(--transition-base);
    backdrop-filter: blur(10px);
    animation: fadeInUp 0.8s ease forwards;
    opacity: 0;
}

.vision-card:nth-child(1) { animation-delay: 0.3s; }
.vision-card:nth-child(2) { animation-delay: 0.4s; }
.vision-card:nth-child(3) { animation-delay: 0.5s; }

.vision-card:hover {
    background: var(--color-bg-card-hover);
    border-color: var(--color-border-hover);
    transform: translateY(-4px);
}

.vision-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(167, 139, 250, 0.1);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    color: var(--color-accent);
}

.vision-card h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.01em;
}

.vision-card p {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ================================
   Coming Soon Section
   ================================ */
.coming-soon {
    padding: var(--spacing-3xl) 0;
    position: relative;
    display: flex;
    justify-content: center;
}

.coming-soon-content {
    text-align: center;
    position: relative;
    z-index: 2;
    animation: fadeInUp 0.8s ease 0.6s forwards;
    opacity: 0;
}

.badge {
    display: inline-block;
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    background: rgba(167, 139, 250, 0.1);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 100px;
    border: 1px solid rgba(167, 139, 250, 0.2);
    margin-bottom: var(--spacing-lg);
}

.brain-logo {
    display: block;
    width: 200px;
    height: auto;
    margin: 0 auto var(--spacing-md);
    opacity: 0.9;
    transition: all var(--transition-base);
}

.brain-logo:hover {
    opacity: 1;
    transform: scale(1.02);
}

.coming-soon-text {
    font-size: var(--font-size-lg);
    color: var(--color-text-muted);
}

.coming-soon-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(167, 139, 250, 0.15) 0%, transparent 70%);
    pointer-events: none;
    animation: pulse 6s ease-in-out infinite;
    animation-delay: 2s;
}

/* ================================
   Footer
   ================================ */
.footer {
    padding: var(--spacing-3xl) var(--spacing-lg) var(--spacing-xl);
    border-top: 1px solid var(--color-border);
    margin-top: var(--spacing-2xl);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.stana-wordmark {
    font-size: var(--font-size-xl);
    font-weight: 700;
    letter-spacing: 0.15em;
    color: var(--color-text-primary);
}

.footer-info p,
.footer-legal p {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    line-height: 1.8;
}

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.footer-bottom p {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    text-align: center;
}

/* ================================
   Animations
   ================================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 0.4;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.1);
        opacity: 0.2;
    }
}

/* ================================
   Responsive
   ================================ */
@media (max-width: 768px) {
    .hero {
        min-height: 60vh;
        padding: var(--spacing-2xl) 0;
    }
    
    .hero-glow {
        width: 300px;
        height: 300px;
    }
    
    .vision {
        padding: var(--spacing-2xl) 0;
    }
    
    .vision-card {
        padding: var(--spacing-lg);
    }
    
    .brain-logo {
        width: 160px;
    }
    
    .footer-content {
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .headline {
        font-size: var(--font-size-3xl);
    }
    
    .subtitle {
        font-size: var(--font-size-base);
    }
}