:root {
    --bg: #0b1020;
    --panel: #121a2d;
    --panel-soft: #172238;
    --text: #e8edf7;
    --muted: #9ba8bd;
    --line: #26344f;
    --accent: #75a7ff;
    --max: 960px;
}

* {
    box-sizing: border-box;
}

html {
    color-scheme: dark;
}

body {
    margin: 0;
    background:
        radial-gradient(circle at top right, rgba(74, 120, 210, .17), transparent 32rem),
        var(--bg);
    color: var(--text);
    font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.7;
}

a {
    color: var(--accent);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.wrap {
    width: min(calc(100% - 32px), var(--max));
    margin: auto;
}

header {
    border-bottom: 1px solid var(--line);
    background: rgba(11, 16, 32, .82);
    backdrop-filter: blur(12px);
}

.nav {
    min-height: 68px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.brand {
    color: var(--text);
    font-weight: 700;
    letter-spacing: .02em;
}

nav {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

nav a {
    color: var(--muted);
}

.hero {
    padding: 88px 0 56px;
}

.eyebrow {
    color: var(--accent);
    font-size: .85rem;
    font-weight: 700;
    letter-spacing: .14em;
    text-transform: uppercase;
}

h1 {
    margin: 12px 0 16px;
    max-width: 760px;
    font-size: clamp(2.2rem, 6vw, 4.5rem);
    line-height: 1.08;
}

.lead {
    max-width: 680px;
    color: var(--muted);
    font-size: 1.1rem;
}

.grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
    padding-bottom: 72px;
}

.card {
    display: block;
    padding: 24px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: linear-gradient(145deg, var(--panel), var(--panel-soft));
    color: var(--text);
}

.card:hover {
    border-color: #46699f;
    text-decoration: none;
    transform: translateY(-2px);
}

.card h2 {
    margin: 0 0 8px;
    font-size: 1.15rem;
}

.card p {
    margin: 0;
    color: var(--muted);
}

.content {
    max-width: 760px;
    padding: 64px 0 88px;
}

.content h1 {
    font-size: clamp(2rem, 5vw, 3.4rem);
}

.content h2 {
    margin-top: 42px;
}

.content p,
.content li {
    color: var(--muted);
}

.note-list {
    list-style: none;
    padding: 0;
}

.note-list li {
    padding: 18px 0;
    border-bottom: 1px solid var(--line);
}

.note-list strong {
    display: block;
    color: var(--text);
}

code {
    padding: .15em .4em;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: var(--panel);
}

footer {
    border-top: 1px solid var(--line);
    color: var(--muted);
}

.footer {
    padding: 28px 0;
    display: flex;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
}

@media (max-width: 680px) {
    .nav {
        align-items: flex-start;
        flex-direction: column;
        padding: 18px 0;
    }

    .hero {
        padding-top: 56px;
    }

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