/* =====================================================
   OpenVM - GitHub Pages Documentation Style
   ===================================================== */

/* CSS Variables */
:root {
    /* Colors - Dark Cloud Theme */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: rgba(20, 20, 30, 0.8);
    --bg-glass: rgba(255, 255, 255, 0.05);

    --text-primary: #e8e8ec;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;

    /* Cloud/Tech Colors */
    --cloud-primary: #3b82f6;
    --cloud-secondary: #2563eb;
    --cloud-light: #60a5fa;
    --accent-purple: #8b5cf6;
    --accent-green: #10b981;
    --accent-orange: #f59e0b;
    --danger: #ef4444;

    /* Gradients */
    --gradient-cloud: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    --gradient-tech: linear-gradient(135deg, #3b82f6 0%, #10b981 100%);

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Borders */
    --border-radius-sm: 0.375rem;
    --border-radius-md: 0.5rem;
    --border-radius-lg: 1rem;
    --border-radius-xl: 1.5rem;

    /* Shadows */
    --shadow-glow: 0 0 30px rgba(59, 130, 246, 0.3);
    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--space-md);
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
}

h2 {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
}

h3 {
    font-size: clamp(1.25rem, 2vw, 1.5rem);
}

p {
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
}

a {
    color: var(--cloud-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--cloud-light);
}

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

section {
    padding: var(--space-3xl) 0;
    position: relative;
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: var(--space-md) 0;
    background: rgba(10, 10, 15, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

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

.nav-logo {
    font-weight: 700;
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.nav-logo i {
    font-size: 1.5rem;
    background: var(--gradient-cloud);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-logo span {
    background: var(--gradient-cloud);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

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

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

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(139, 92, 246, 0.15) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: var(--bg-glass);
    border: 1px solid rgba(59, 130, 246, 0.3);
    border-radius: 2rem;
    font-size: 0.85rem;
    color: var(--cloud-primary);
    margin-bottom: var(--space-lg);
}

.hero h1 .gradient-text {
    background: var(--gradient-cloud);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto var(--space-xl);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--border-radius-md);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-base);
    border: none;
    text-decoration: none;
}

.btn-primary {
    background: var(--gradient-cloud);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
    color: white;
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    background: var(--bg-glass);
    border-color: rgba(255, 255, 255, 0.3);
}

.hero-buttons {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* Cards */
.card {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.05);
    padding: var(--space-xl);
    backdrop-filter: blur(10px);
    transition: all var(--transition-base);
}

.card:hover {
    border-color: rgba(59, 130, 246, 0.3);
    transform: translateY(-4px);
    box-shadow: var(--shadow-card);
}

.card-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-cloud);
    border-radius: var(--border-radius-md);
    margin-bottom: var(--space-md);
    font-size: 1.5rem;
}

.card-title {
    font-size: 1.25rem;
    margin-bottom: var(--space-sm);
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section-header .badge {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: rgba(139, 92, 246, 0.2);
    border: 1px solid rgba(139, 92, 246, 0.3);
    border-radius: 2rem;
    font-size: 0.85rem;
    color: var(--accent-purple);
    margin-bottom: var(--space-md);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Grid Layouts */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-xl);
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--space-xl);
}

/* Architecture Section */
.architecture {
    background: var(--bg-secondary);
}

.architecture-diagram {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: var(--space-lg);
    padding: var(--space-xl);
}

.arch-node {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--space-lg);
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    min-width: 150px;
    text-align: center;
    transition: all var(--transition-base);
}

.arch-node:hover {
    border-color: var(--cloud-primary);
    box-shadow: var(--shadow-glow);
}

.arch-node-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-sm);
}

.arch-node-title {
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.arch-node-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.arch-arrow {
    font-size: 1.5rem;
    color: var(--cloud-primary);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 0.5;
        transform: translateX(0);
    }

    50% {
        opacity: 1;
        transform: translateX(5px);
    }
}

/* Feature List */
.feature-list {
    list-style: none;
    padding: 0;
}

.feature-list li {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
    color: var(--text-secondary);
}

.feature-list li i {
    color: var(--accent-green);
    font-size: 1.2rem;
    margin-top: 2px;
}

/* Code Block */
.code-block {
    background: var(--bg-secondary);
    border-radius: var(--border-radius-md);
    padding: var(--space-lg);
    overflow-x: auto;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.code-block code {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--cloud-light);
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    padding: var(--space-xl) 0;
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-text {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
    margin-top: var(--space-md);
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .grid-2 {
        grid-template-columns: 1fr;
    }

    .architecture-diagram {
        flex-direction: column;
    }

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

    .hero h1 {
        font-size: 2rem;
    }

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

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-in {
    animation: fadeInUp 0.6s ease forwards;
}