:root {
    --bg: #0f1419;
    --surface: #1a2332;
    --text: #e8eef7;
    --muted: #9aa8bc;
    --accent: #6ea8fe;
    --accent-hover: #8bb9ff;
    --border: #2a3548;
    --radius: 12px;
    --shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
}

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

body {
    margin: 0;
    min-height: 100vh;
    font-family: "Segoe UI", system-ui, sans-serif;
    background: radial-gradient(circle at top, #1b2a44 0%, var(--bg) 55%);
    color: var(--text);
    line-height: 1.6;
}

.container {
    width: min(960px, 92%);
    margin: 0 auto;
}

.site-header {
    border-bottom: 1px solid var(--border);
    background: rgba(15, 20, 25, 0.85);
    backdrop-filter: blur(8px);
    position: sticky;
    top: 0;
    z-index: 10;
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
}

.logo {
    color: var(--text);
    font-weight: 700;
    font-size: 1.25rem;
    text-decoration: none;
}

.nav {
    display: flex;
    gap: 1rem;
}

.nav a {
    color: var(--muted);
    text-decoration: none;
    padding: 0.35rem 0.6rem;
    border-radius: 8px;
}

.nav a:hover,
.nav a[aria-current="page"] {
    color: var(--text);
    background: var(--surface);
}

main {
    padding: 2.5rem 0 4rem;
}

.hero {
    padding: 2rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: linear-gradient(145deg, rgba(26, 35, 50, 0.95), rgba(15, 20, 25, 0.9));
    box-shadow: var(--shadow);
}

.eyebrow {
    margin: 0 0 0.5rem;
    color: var(--accent);
    font-size: 0.85rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.hero h1 {
    margin: 0 0 1rem;
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    line-height: 1.2;
}

.lead {
    color: var(--muted);
    max-width: 60ch;
}

.button {
    display: inline-block;
    margin-top: 1.25rem;
    padding: 0.75rem 1.25rem;
    border-radius: 999px;
    background: var(--accent);
    color: #0f1419;
    font-weight: 600;
    text-decoration: none;
}

.button:hover {
    background: var(--accent-hover);
}

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
    margin-top: 2rem;
}

.card,
.content-block,
.page-header {
    padding: 1.25rem 1.5rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
}

.page-header {
    margin-bottom: 1rem;
}

.content-block + .content-block {
    margin-top: 1rem;
}

.card h2,
.content-block h2 {
    margin-top: 0;
    font-size: 1.1rem;
}

code {
    padding: 0.15rem 0.4rem;
    border-radius: 6px;
    background: rgba(110, 168, 254, 0.12);
    color: var(--accent);
    font-size: 0.9em;
}

.site-footer {
    border-top: 1px solid var(--border);
    padding: 1.5rem 0 2rem;
    color: var(--muted);
    font-size: 0.9rem;
}

@media (max-width: 600px) {
    .site-header .container {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }
}