:root { --ink: #1b1d22; --paper: #f6f4ef; --muted: #5d6068; --accent: #3d5afe; --line: #d9d5cc; color-scheme: light dark; }
@media (prefers-color-scheme: dark) {
:root { --ink: #ecebe6; --paper: #15171b; --muted: #a3a6ad; --accent: #8c9eff; --line: #2c2f36; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 17px/1.55 system-ui, -apple-system, "Segoe UI", sans-serif; }
header, main, footer { max-width: 880px; margin: 0 auto; padding: 0 16px; }
.hero { padding-top: 72px; padding-bottom: 40px; }
.mark { margin: 0; color: var(--accent); font-weight: 700; letter-spacing: 0.08em; }
h1 { margin: 8px 0 16px; font-size: clamp(2rem, 6vw, 3.4rem); line-height: 1.1; }
.lead { max-width: 40rem; color: var(--muted); font-size: 1.15rem; }
section { padding: 32px 0; border-top: 1px solid var(--line); }
h2 { margin: 0 0 16px; font-size: 1.4rem; }
.ops { list-style: none; margin: 0 0 12px; padding: 0; display: grid; gap: 8px; }
.ops li { display: flex; gap: 16px; align-items: baseline; }
.ops code { min-width: 7rem; color: var(--accent); font-weight: 600; }
.features { display: grid; gap: 24px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.features h3 { margin: 0 0 6px; font-size: 1.05rem; }
.features p { margin: 0; color: var(--muted); }
pre { margin: 0; padding: 16px; overflow-x: auto; border: 1px solid var(--line); border-radius: 8px; font: 14px/1.6 ui-monospace, "SF Mono", Menlo, monospace; }
footer { padding-top: 24px; padding-bottom: 48px; color: var(--muted); font-size: 0.9rem; border-top: 1px solid var(--line); }
footer a { color: var(--accent); }