:root {
  --bg: #f7f6f2;
  --surface: #ffffff;
  --ink: #17191c;
  --muted: #5c616a;
  --line: #e2e0d9;
  --accent: #c2410c;
  --accent-soft: #fbe9df;
  --ok: #15803d;
  --ok-soft: #e3f3e8;
  --code-bg: #f0eee8;
  --term-bg: #15171a;
  --term-ink: #e7e5df;
  --term-muted: #8b9099;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --serif: "Iowan Old Style", "Charter", Georgia, "Songti SC", serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111315;
    --surface: #181b1e;
    --ink: #e8e6e1;
    --muted: #9aa0a8;
    --line: #2a2e33;
    --accent: #f0743e;
    --accent-soft: #3a2118;
    --ok: #4ade80;
    --ok-soft: #13291b;
    --code-bg: #1e2125;
    --term-bg: #0b0c0e;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; overflow-x: hidden; background: var(--bg); color: var(--ink); font: 16px/1.6 var(--sans); }
a { color: inherit; text-decoration-color: color-mix(in srgb, currentColor 35%, transparent); text-underline-offset: 3px; }
a:hover { color: var(--accent); }
code, pre, kbd { font-family: var(--mono); font-size: 0.9em; }
img { max-width: 100%; height: auto; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 760px; }

/* Header and footer */
.top { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; justify-content: space-between; height: 60px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; font: 600 17px/1 var(--mono); text-decoration: none; letter-spacing: -0.02em; }
.mark { width: 18px; height: 18px; border-radius: 4px; background: linear-gradient(135deg, var(--ok) 0 50%, var(--accent) 50% 100%); }
.top nav { display: flex; gap: 22px; font-size: 14.5px; overflow-x: auto; scrollbar-width: none; }
.top nav a { text-decoration: none; color: var(--muted); white-space: nowrap; }
.top nav a:hover, .top nav a[aria-current] { color: var(--ink); }
footer { border-top: 1px solid var(--line); margin-top: 96px; padding: 28px 0 40px; color: var(--muted); font-size: 14px; }

/* Landing */
.hero { padding: 72px 0 40px; display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: 48px; align-items: center; }
.eyebrow { font: 500 13px/1 var(--mono); color: var(--accent); letter-spacing: 0.04em; text-transform: uppercase; margin: 0 0 18px; }
.hero h1 { font: 650 clamp(34px, 5vw, 54px)/1.06 var(--sans); letter-spacing: -0.035em; margin: 0 0 20px; }
.hero h1 em { font-style: normal; color: var(--accent); }
.lede { font-size: 18.5px; color: var(--muted); margin: 0 0 28px; max-width: 34em; }
.cmd { display: flex; align-items: center; gap: 10px; background: var(--term-bg); color: var(--term-ink); border-radius: 10px; padding: 12px 12px 12px 16px; font: 14px/1.4 var(--mono); max-width: 560px; }
.cmd code { flex: 1; overflow-x: auto; white-space: nowrap; scrollbar-width: none; font-size: 13.5px; }
.cmd code::before { content: "$ "; color: var(--term-muted); }
.copy { flex: none; border: 1px solid #3a3e44; background: transparent; color: var(--term-ink); border-radius: 6px; font: 12px/1 var(--mono); padding: 7px 10px; cursor: pointer; }
.copy:hover { border-color: var(--term-ink); }
.actions { display: flex; gap: 12px; margin-top: 18px; flex-wrap: wrap; }
.btn { display: inline-block; padding: 10px 16px; border-radius: 8px; font-weight: 550; font-size: 15px; text-decoration: none; border: 1px solid var(--line); background: var(--surface); }
.btn.primary { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.btn.primary:hover { color: var(--bg); opacity: 0.9; }

.probe { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; box-shadow: 0 1px 0 var(--line), 0 18px 40px -24px rgb(0 0 0 / 0.25); overflow: hidden; }
.probe-head { display: flex; justify-content: space-between; padding: 12px 16px; border-bottom: 1px solid var(--line); font: 12.5px/1 var(--mono); color: var(--muted); }
.probe table { width: 100%; border-collapse: collapse; font: 13px/1.45 var(--mono); }
.probe th { text-align: left; font-weight: 500; color: var(--muted); padding: 10px 16px 6px; font-size: 11.5px; text-transform: uppercase; letter-spacing: 0.05em; }
.probe td { padding: 9px 16px; border-top: 1px solid var(--line); vertical-align: top; }
.probe td.c { word-break: break-word; }
.probe td.n { text-align: right; white-space: nowrap; }
.tag { display: inline-block; font-size: 11px; padding: 2px 7px; border-radius: 99px; white-space: nowrap; }
.tag.bad { background: var(--accent-soft); color: var(--accent); }
.tag.good { background: var(--ok-soft); color: var(--ok); }
.probe-foot { padding: 10px 16px; border-top: 1px solid var(--line); font-size: 12.5px; color: var(--muted); }

section.block { padding: 64px 0 8px; }
.block h2 { font: 650 clamp(24px, 3vw, 32px)/1.15 var(--sans); letter-spacing: -0.025em; margin: 0 0 10px; }
.block .sub { color: var(--muted); margin: 0 0 32px; max-width: 46em; font-size: 17px; }
.steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.step { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 22px; }
.step .num { font: 600 13px/1 var(--mono); color: var(--accent); }
.step h3 { margin: 10px 0 8px; font-size: 18px; letter-spacing: -0.01em; }
.step p { margin: 0 0 14px; color: var(--muted); font-size: 15px; }
.step pre { margin: 0; background: var(--code-bg); border-radius: 8px; padding: 10px 12px; overflow-x: auto; font-size: 12.5px; }

.patterns { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.pattern { background: var(--surface); padding: 22px; }
.pattern h3 { margin: 0 0 8px; font-size: 16.5px; }
.pattern p { margin: 0 0 12px; color: var(--muted); font-size: 14.5px; }
.pattern code { display: block; background: var(--code-bg); border-radius: 6px; padding: 7px 10px; font-size: 12.5px; overflow-x: auto; white-space: nowrap; }
.more { margin-top: 18px; }

.demo { border-radius: 12px; overflow: hidden; border: 1px solid var(--line); background: var(--term-bg); }
.demo img { display: block; width: 100%; }
.caption { color: var(--muted); font-size: 14px; margin-top: 10px; }

.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 28px; align-items: start; }
.cards { display: grid; gap: 14px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 18px 20px; }
.card h3 { margin: 0 0 4px; font-size: 16.5px; }
.card p { margin: 0; color: var(--muted); font-size: 14.5px; }
.term { background: var(--term-bg); color: var(--term-ink); border-radius: 12px; padding: 18px 20px; overflow-x: auto; font: 12.5px/1.6 var(--mono); margin: 0; }
.term .k { color: var(--term-muted); }
.term .a { color: #f59e6b; }

.principle { background: var(--surface); border: 1px solid var(--line); border-left: 4px solid var(--accent); border-radius: 12px; padding: 26px 28px; }
.principle p { margin: 0 0 10px; max-width: 52em; }
.principle p:last-child { margin: 0; color: var(--muted); }

/* Docs and posts */
.docgrid { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 48px; padding-top: 40px; }
.toc { position: sticky; top: 84px; align-self: start; font-size: 13.5px; max-height: calc(100vh - 100px); overflow-y: auto; }
.toc-title { font: 600 11.5px/1 var(--mono); text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); margin-bottom: 12px; }
.toc ul { list-style: none; margin: 0; padding: 0; }
.toc li { margin: 0 0 8px; }
.toc a { text-decoration: none; color: var(--muted); }
.toc a:hover { color: var(--ink); }
.toc ul ul { display: none; }
.prose { min-width: 0; padding-top: 8px; }
.post { padding-top: 48px; }
.prose h1 { font: 650 clamp(30px, 4.2vw, 42px)/1.12 var(--sans); letter-spacing: -0.03em; margin: 0 0 24px; }
.prose h2 { font-size: 24px; letter-spacing: -0.02em; margin: 48px 0 12px; line-height: 1.25; }
.prose h3 { font-size: 18.5px; margin: 32px 0 8px; }
.prose h1 .headerlink, .prose h4 .headerlink { display: none; }
.prose h2 .headerlink, .prose h3 .headerlink { margin-left: 8px; color: var(--line); text-decoration: none; opacity: 0; }
.prose h2:hover .headerlink, .prose h3:hover .headerlink { opacity: 1; }
.prose p, .prose li { max-width: 46em; }
.prose li { margin: 4px 0; }
.prose code { background: var(--code-bg); padding: 1.5px 5px; border-radius: 4px; overflow-wrap: anywhere; }
.prose pre { background: var(--code-bg); border-radius: 10px; padding: 14px 16px; overflow-x: auto; line-height: 1.5; }
.prose pre code { background: none; padding: 0; overflow-wrap: normal; font-size: 13px; }
.prose table { border-collapse: collapse; font-size: 14px; margin: 16px 0; display: block; overflow-x: auto; max-width: 100%; }
.prose th, .prose td { border-bottom: 1px solid var(--line); padding: 8px 12px 8px 0; text-align: left; vertical-align: top; }
.prose th { font-weight: 600; white-space: nowrap; }
.prose blockquote { margin: 16px 0; padding: 4px 18px; border-left: 3px solid var(--line); color: var(--muted); }
.post p, .post li { font: 18.5px/1.7 var(--serif); }
.post h2 { margin-top: 56px; }
.post h3 { font-size: 20px; }
.kicker { font: 500 13px/1 var(--mono) !important; color: var(--muted); margin: 0 0 14px; }
.posts { list-style: none; padding: 0; }
.posts li { padding: 20px 0; border-bottom: 1px solid var(--line); }
.posts .post-title { font-size: 20px; font-weight: 600; }
.posts .post-meta { display: block; color: var(--muted); font: 13px var(--mono); margin-top: 4px; }
.posts p { margin: 8px 0 0; color: var(--muted); }

@media (max-width: 900px) {
  .hero, .split { grid-template-columns: minmax(0, 1fr); }
  .split > div:last-child > h2:first-child { display: none; }
  .hero { padding-top: 44px; gap: 36px; }
  .steps, .patterns { grid-template-columns: minmax(0, 1fr); }
  .docgrid { grid-template-columns: 1fr; gap: 0; padding-top: 24px; }
  .toc { display: none; }
}
@media (max-width: 600px) {
  .wrap { padding: 0 16px; }
  .top nav { gap: 14px; font-size: 14px; }
  .top nav a:nth-child(3), .top nav a:nth-child(4) { display: none; }
  .hero h1 { font-size: 34px; }
  .probe td.c { font-size: 11.5px; }
  .probe table { font-size: 12px; }
  .probe td, .probe th { padding-left: 10px; padding-right: 10px; }
  .post p, .post li { font-size: 17.5px; }
}