:root {
    --color-bg-deep: #0a0c10;
    --color-bg: #0d1117;
    --color-bg-elevated: #161b22;
    --color-border: #30363d;
    --color-border-light: #21262d;
    --color-text: #e6edf3;
    --color-text-muted: #8b949e;
    --color-text-subtle: #6e7681;
    --color-accent: #58a6ff;
    --color-accent-glow: rgba(88, 166, 255, 0.4);
    --color-success: #3fb950;
    --color-warning: #d29922;
    --color-gradient-start: #58a6ff;
    --color-gradient-end: #1f6feb;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px var(--color-accent-glow);
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
}

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg-deep);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

#particle-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

.overlay {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background: rgba(10, 12, 16, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border-light);
    transition: background var(--transition-normal);
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    width: 32px;
    height: 32px;
    color: var(--color-accent);
}

.logo-text {
    font-size: 1.125rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.nav {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-link {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

.nav-cta {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-bg);
    background: var(--color-text);
    border-radius: var(--radius-sm);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.nav-cta:hover {
    background: var(--color-accent);
    box-shadow: var(--shadow-glow);
}

/* Main */
.main {
    flex: 1;
    padding-top: 80px;
}

/* Hero */
.hero {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - 80px);
    padding: 4rem 2rem;
    text-align: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.375rem 0.875rem;
    font-size: 0.8125rem;
    color: var(--color-accent);
    background: rgba(88, 166, 255, 0.1);
    border: 1px solid rgba(88, 166, 255, 0.2);
    border-radius: 100px;
    margin-bottom: 1.5rem;
}

.badge-dot {
    width: 6px;
    height: 6px;
    background: var(--color-success);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
    max-width: 900px;
    margin-bottom: 1.5rem;
}

.gradient-text {
    background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    max-width: 600px;
    margin-bottom: 2.5rem;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 3rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.btn-primary {
    color: #fff;
    background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
    box-shadow: 0 4px 20px rgba(88, 166, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(88, 166, 255, 0.4);
}

.btn-secondary {
    color: var(--color-text);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-border);
    border-color: var(--color-text-muted);
}

.hero-stats {
    display: flex;
    gap: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--color-border-light);
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    font-family: var(--font-mono);
}

.stat-label {
    font-size: 0.8125rem;
    color: var(--color-text-subtle);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Sections */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    margin-bottom: 0.75rem;
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* Features */
.features {
    padding: 6rem 2rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

.feature-card {
    padding: 2rem;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
}

.feature-card:hover {
    border-color: var(--color-border);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 48px;
    height: 48px;
    padding: 10px;
    background: rgba(88, 166, 255, 0.1);
    border-radius: var(--radius-md);
    margin-bottom: 1.25rem;
    color: var(--color-accent);
}

.feature-icon svg {
    width: 100%;
    height: 100%;
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.feature-card p {
    color: var(--color-text-muted);
    font-size: 0.9375rem;
    line-height: 1.6;
}

/* Architecture */
.architecture {
    padding: 6rem 2rem;
    background: linear-gradient(180deg, transparent, rgba(88, 166, 255, 0.02), transparent);
}

.arch-diagram {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.arch-layer {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.arch-node {
    padding: 1rem 1.5rem;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 0.9375rem;
    font-weight: 500;
    text-align: center;
    min-width: 140px;
}

.arch-node.substrate {
    background: linear-gradient(135deg, rgba(88, 166, 255, 0.1), rgba(31, 111, 235, 0.1));
    border-color: rgba(88, 166, 255, 0.3);
    color: var(--color-accent);
}

.arch-connector {
    display: flex;
    justify-content: center;
    padding: 0.25rem 0;
}

.connector-line {
    width: 2px;
    height: 24px;
    background: linear-gradient(180deg, var(--color-border), var(--color-accent), var(--color-border));
    border-radius: 1px;
}

/* Code Section */
.code-section {
    padding: 6rem 2rem;
}

.code-block {
    max-width: 700px;
    margin: 0 auto;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    background: var(--color-bg-elevated);
    border-bottom: 1px solid var(--color-border-light);
}

.code-tabs {
    display: flex;
    gap: 0.25rem;
}

.code-tab {
    padding: 0.375rem 0.75rem;
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    background: none;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.code-tab:hover {
    color: var(--color-text);
}

.code-tab.active {
    color: var(--color-text);
    background: var(--color-bg);
}

.code-copy {
    padding: 0.375rem;
    color: var(--color-text-muted);
    background: none;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.code-copy:hover {
    color: var(--color-text);
    background: var(--color-bg);
}

.code-content {
    padding: 1.25rem;
}

.code-content pre {
    display: none;
    margin: 0;
}

.code-content pre.active {
    display: block;
}

.code-content code {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.7;
    color: var(--color-text);
    white-space: pre-wrap;
}

/* Footer */
.footer {
    padding: 4rem 2rem 2rem;
    border-top: 1px solid var(--color-border-light);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto 3rem;
    flex-wrap: wrap;
    gap: 3rem;
}

.footer-brand {
    max-width: 300px;
}

.footer-brand .logo {
    margin-bottom: 1rem;
}

.footer-brand p {
    color: var(--color-text-muted);
    font-size: 0.9375rem;
}

.footer-links {
    display: flex;
    gap: 4rem;
}

.footer-col h4 {
    font-size: 0.9375rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.footer-col a {
    display: block;
    font-size: 0.875rem;
    color: var(--color-text-muted);
    text-decoration: none;
    margin-bottom: 0.5rem;
    transition: color var(--transition-fast);
}

.footer-col a:hover {
    color: var(--color-text);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--color-border-light);
}

.footer-bottom p {
    font-size: 0.8125rem;
    color: var(--color-text-subtle);
}

/* Responsive */
@media (max-width: 768px) {
    .header {
        padding: 1rem;
    }

    .nav {
        display: none;
    }

    .hero {
        padding: 3rem 1.5rem;
    }

    .hero-actions {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    .hero-stats {
        flex-direction: column;
        gap: 1.5rem;
    }

    .features, .architecture, .code-section {
        padding: 4rem 1.5rem;
    }

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

    .footer-content {
        flex-direction: column;
    }

    .footer-links {
        flex-wrap: wrap;
        gap: 2rem;
    }
}