:root {
    --bg: #0c0d10;
    --panel: #15171c;
    --text: #f2f3f5;
    --muted: #9aa0a8;
    --accent: #4c8dff;
    --border: #23262d;
    --maxw: 720px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    font-size: 17px;
}

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

.wrap {
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 0 24px;
}

header.site {
    padding: 28px 0;
    border-bottom: 1px solid var(--border);
}
header.site .wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}
.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    font-size: 18px;
    color: var(--text);
}
.brand .mark { font-size: 22px; }
nav a { color: var(--muted); margin-left: 18px; font-size: 15px; }

.hero {
    text-align: center;
    padding: 72px 0 56px;
}
.hero .mark { font-size: 64px; display: block; margin-bottom: 12px; }
.hero h1 {
    font-size: 40px;
    line-height: 1.15;
    margin: 0 0 14px;
    letter-spacing: -0.02em;
}
.hero p.lede {
    font-size: 20px;
    color: var(--muted);
    margin: 0 auto 28px;
    max-width: 540px;
}
.badge {
    display: inline-block;
    padding: 8px 16px;
    border: 1px solid var(--border);
    border-radius: 999px;
    color: var(--muted);
    font-size: 14px;
}

.features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    padding: 24px 0 64px;
}
.card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 20px;
}
.card h3 { margin: 0 0 6px; font-size: 17px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }

main.doc { padding: 48px 0 64px; }
main.doc h1 { font-size: 32px; letter-spacing: -0.02em; margin: 0 0 4px; }
main.doc .updated { color: var(--muted); font-size: 14px; margin: 0 0 28px; }
main.doc h2 { font-size: 20px; margin: 32px 0 8px; }
main.doc p, main.doc li { color: #d7dade; }
main.doc strong { color: var(--text); }

footer.site {
    border-top: 1px solid var(--border);
    padding: 28px 0;
    color: var(--muted);
    font-size: 14px;
}
footer.site .wrap {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}
footer.site a { color: var(--muted); margin-right: 16px; }

@media (max-width: 560px) {
    .hero h1 { font-size: 32px; }
    .features { grid-template-columns: 1fr; }
    header.site .wrap { flex-direction: column; align-items: flex-start; }
    nav a { margin-left: 0; margin-right: 18px; }
}