:root {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent: #38bdf8;
    --accent-hover: #0284c7;
    --border: #334155;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

.navbar {
    background-color: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 16px 0;
}

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

.brand {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.025em;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    margin-left: 24px;
    font-size: 0.95rem;
    transition: color 0.15s ease;
}

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

.hero {
    padding: 100px 0 60px;
    text-align: center;
}

.badge {
    display: inline-block;
    padding: 6px 14px;
    background-color: rgba(56, 189, 248, 0.1);
    color: var(--accent);
    border: 1px solid rgba(56, 189, 248, 0.3);
    border-radius: 9999px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 24px;
}

.hero h1 {
    font-size: 2.75rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
    letter-spacing: -0.03em;
}

.hero p {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 36px;
}

.cta-group {
    display: flex;
    justify-content: center;
    gap: 16px;
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.15s ease;
}

.btn-primary {
    background-color: var(--accent);
    color: #0f172a;
}

.btn-primary:hover {
    background-color: var(--accent-hover);
}

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

.btn-secondary:hover {
    background-color: #2e3d55;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    padding: 60px 24px;
}

.feature-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 28px;
}

.feature-card h3 {
    font-size: 1.2rem;
    margin-bottom: 12px;
    color: var(--accent);
}

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

.architecture-section {
    padding: 20px 24px 80px;
}

.panel {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 36px;
}

.panel h2 {
    font-size: 1.5rem;
    margin-bottom: 16px;
}

.panel p {
    color: var(--text-secondary);
}

footer {
    border-top: 1px solid var(--border);
    padding: 40px 0;
    text-align: center;
}

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

.footer-sub {
    font-size: 0.8rem;
    margin-top: 6px;
    color: #64748b;
}

@media (max-width: 640px) {
    .hero h1 { font-size: 2rem; }
    .cta-group { flex-direction: column; }
    .nav-links { display: none; }
}