:root {
  color-scheme: light dark;
  --bg: #f5f8fb;
  --grid: #e3eaf1;
  --surface: #ffffff;
  --code-bg: #f5f8fb;
  --border: #dbe5ee;
  --text: #13263a;
  --text-2: #3f5568;
  --text-3: #5a7085;
  --accent: #0e7490;
  --accent-text: #ffffff;
  --error: #dc2626;
  --tok-annotation: #0e7490;
  --tok-keyword: #7c3aed;
  --tok-string: #b45309;
  --tok-comment: #5a7085;
  --serif: Georgia, 'Times New Roman', serif;
  --sans: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --mono: ui-monospace, Consolas, 'SF Mono', Menlo, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0c1722;
    --grid: #162636;
    --surface: #0f1d2a;
    --code-bg: #0a141e;
    --border: #22384b;
    --text: #e3ecf4;
    --text-2: #a9bccd;
    --text-3: #8ea4b8;
    --accent: #22b8cf;
    --accent-text: #0c1722;
    --error: #f87171;
    --tok-annotation: #22b8cf;
    --tok-keyword: #c4b5fd;
    --tok-string: #fbbf24;
    --tok-comment: #8ea4b8;
  }
}

*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 var(--sans);
}

a { color: var(--accent); }

.wrap { max-width: 1040px; margin: 0 auto; padding: 0 16px; }

/* Read by assistive technology and search engines, not shown. */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.grid-bg {
  background-color: var(--bg);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 16px 16px;
}

.plain-bg { background: var(--surface); }

/* Header */
.site-header { display: flex; justify-content: space-between; align-items: center; padding-block: 20px; font-size: 14px; }
.brand { font-weight: 700; letter-spacing: .08em; color: var(--text); text-decoration: none; }
.site-nav a { color: var(--text-3); text-decoration: none; margin-left: 20px; }
.site-nav a:hover { color: var(--accent); }

/* Hero */
.hero { padding: 24px 0 64px; }
.hero-inner { display: flex; gap: 40px; align-items: center; }
.hero-copy { flex: 1; min-width: 0; }
h1 { font: 400 clamp(2rem, 5vw, 3.2rem)/1.12 var(--serif); margin: 0; }
.pitch { font: italic 1.2rem/1.5 var(--serif); color: var(--text-2); margin: 16px 0 8px; }
.support { font-size: 14px; color: var(--text-3); margin: 0 0 24px; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.button { display: inline-block; padding: 10px 18px; border-radius: 4px; font-weight: 600; font-size: 15px; text-decoration: none; }
.button.primary { background: var(--accent); color: var(--accent-text); }
.button.secondary { border: 1px solid var(--border); background: var(--surface); color: var(--text); font-weight: 400; }
.badge { display: block; height: 20px; }
.hero-graph { flex: 0 0 auto; width: 240px; max-width: 40%; height: auto; }
.graph-edge { stroke: var(--accent); }
.graph-edge.broken { stroke: var(--error); stroke-dasharray: 3 3; }
.graph-node { fill: var(--surface); stroke: var(--accent); }
.graph-node.center { fill: var(--accent); }
.graph-node.broken { stroke: var(--error); }
.graph-label { fill: var(--text); font: 7px var(--mono); }
.graph-label.center { fill: var(--accent-text); }
.graph-label.broken { fill: var(--error); }

/* Sections */
section { padding: 64px 0; }
.label { font: 600 12px var(--sans); letter-spacing: .12em; text-transform: uppercase; color: var(--accent); margin: 0 0 8px; }
h2 { font: 400 1.9rem/1.2 var(--serif); margin: 0 0 12px; }
h3 { font: 600 1.05rem/1.3 var(--sans); margin: 0 0 8px; }
.lede { color: var(--text-2); max-width: 680px; margin: 0 0 28px; }
.note { color: var(--text-3); font-size: 14px; max-width: 680px; }

/* Bucket cards */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 6px; padding: 22px; }
.card p { margin: 0; color: var(--text-2); font-size: 15px; }

/* Code */
.panels { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; align-items: start; }
.panel { min-width: 0; }
.panel-title { font: 13px var(--mono); color: var(--text-3); margin: 0 0 6px; }
pre {
  margin: 0;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 16px;
  overflow-x: auto;
  font: 13px/1.55 var(--mono);
  color: var(--text);
}
pre + pre, pre + .panel-title { margin-top: 14px; }
pre.error { background: var(--surface); border-left: 3px solid var(--error); white-space: pre-wrap; }
.e { color: var(--error); font-weight: 600; }
.a { color: var(--tok-annotation); }
.k { color: var(--tok-keyword); }
.s { color: var(--tok-string); }
.c { color: var(--tok-comment); font-style: italic; }

/* Table */
.table-scroll { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: 14px; background: var(--surface); }
th, td { padding: 8px 12px; border-bottom: 1px solid var(--border); text-align: left; white-space: nowrap; }
td.num, th.num { text-align: right; font-family: var(--mono); }
tr.tiko td { font-weight: 700; }

/* Footer */
.site-footer { padding-block: 40px 56px; font-size: 14px; color: var(--text-3); }
.footer-links { display: flex; flex-wrap: wrap; gap: 8px 24px; padding: 0; margin: 0 0 16px; list-style: none; }

@media (max-width: 720px) {
  .hero-inner { flex-direction: column; align-items: flex-start; }
  .hero-graph { width: 200px; max-width: 70%; }
  .cards, .panels { grid-template-columns: 1fr; }
  section { padding: 48px 0; }
  .site-nav a { margin-left: 14px; }
}