:root {
  --k: #0a0a0a;
  --w: #f6f6f4;
  --ink: #111;
  --mute: #5c5c5c;
  --line: #e2e2dc;
  --mono: "IBM Plex Mono", ui-monospace, Menlo, Consolas, monospace;
  --sans: "IBM Plex Sans", "Segoe UI", Helvetica, Arial, sans-serif;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { min-height: 100%; background: var(--k); font-family: var(--sans); line-height: 1.5; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; cursor: pointer; }

.split { display: grid; min-height: 100vh; grid-template-columns: 1fr; }
.k { background: var(--k); color: var(--w); padding: 22px; display: flex; flex-direction: column; gap: 24px; }
.w { background: var(--w); color: var(--ink); padding: 28px 22px 72px; }
.mark { font-family: var(--mono); font-size: 13px; font-weight: 600; }
.mark span { opacity: .45; }
.nav { display: flex; flex-wrap: wrap; gap: 14px 18px; font-family: var(--mono); font-size: 12px; }
.nav a { opacity: .55; }
.nav a:hover { opacity: 1; }
.huge { font-family: var(--mono); font-size: clamp(52px, 14vw, 96px); font-weight: 600; letter-spacing: -.07em; line-height: .85; }
.huge small { display: block; font-size: 12px; letter-spacing: .14em; text-transform: uppercase; opacity: .5; margin-top: 12px; font-weight: 400; }
.k p { color: #bdbdbd; font-size: 14px; max-width: 28ch; }
.k .meta { font-family: var(--mono); font-size: 11px; letter-spacing: .12em; text-transform: uppercase; opacity: .45; margin-top: auto; }
.kicker { font-family: var(--mono); font-size: 11px; letter-spacing: .16em; text-transform: uppercase; opacity: .5; }
h1 { font-size: clamp(28px, 5.5vw, 46px); font-weight: 600; letter-spacing: -.04em; line-height: 1.08; max-width: 16ch; margin: 8px 0 14px; }
.lede { color: var(--mute); max-width: 48ch; margin-bottom: 22px; }
.btns { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 28px; }
.btn { display: inline-flex; align-items: center; min-height: 44px; padding: 0 16px; font-family: var(--mono); font-size: 12px; background: var(--k); color: var(--w); border: 1px solid var(--k); }
.btn.ghost { background: transparent; color: var(--ink); }
.tabs { display: flex; border: 1px solid var(--ink); }
.tabs button { flex: 1; min-height: 44px; background: transparent; border: 0; border-right: 1px solid var(--ink); font-family: var(--mono); font-size: 12px; }
.tabs button:last-child { border-right: 0; }
.tabs button.on { background: var(--k); color: var(--w); }
.stage { border: 1px solid var(--ink); border-top: 0; padding: 18px 16px; }
.stage .big { font-family: var(--mono); font-size: clamp(28px, 7vw, 44px); }
.stage .meta { font-family: var(--mono); font-size: 12px; opacity: .5; margin: 6px 0 16px; }
.tools { list-style: none; }
.tools li { padding: 12px 0; border-top: 1px solid var(--line); }
.tools b { font-family: var(--mono); font-size: 13px; }
.tools p { color: var(--mute); font-size: 14px; }
.badge { font-family: var(--mono); font-size: 10px; letter-spacing: .1em; text-transform: uppercase; opacity: .5; }
.hidden { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0; }
.hidden button { background: transparent; border: 1px solid var(--ink); font-family: var(--mono); font-size: 12px; padding: 8px 10px; min-height: 40px; }
.hidden button.on { background: var(--k); color: var(--w); }
.expand { display: none; margin: 8px 0 16px; padding: 14px; background: var(--k); color: var(--w); font-family: var(--mono); font-size: 12.5px; white-space: pre-wrap; }
.expand.show { display: block; }
.grid3 { display: grid; gap: 12px; margin-top: 28px; }
.card { border: 1px solid var(--ink); padding: 16px; }
.card h3 { font-size: 16px; margin-bottom: 8px; }
.card p { color: var(--mute); font-size: 14px; }
pre.cmd { background: var(--k); color: var(--w); padding: 16px; overflow-x: auto; font-family: var(--mono); font-size: 12.5px; line-height: 1.65; margin: 12px 0; }
.note { color: var(--mute); font-size: 14px; max-width: 58ch; }
h2 { font-family: var(--mono); font-size: 11px; letter-spacing: .14em; text-transform: uppercase; opacity: .5; margin: 36px 0 12px; }
.foot { margin-top: 36px; padding-top: 16px; border-top: 1px solid var(--line); display: flex; flex-wrap: wrap; gap: 8px 16px; font-family: var(--mono); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; opacity: .5; }
@media (min-width: 860px) {
  .split { grid-template-columns: minmax(280px, 40%) 1fr; }
  .k { position: sticky; top: 0; height: 100vh; border-right: 1px solid #000; }
  .w { padding: 40px 44px 88px; }
  .grid3 { grid-template-columns: repeat(3, 1fr); }
}