/* treadfacts: asphalt ink on warm paper, one safety-amber accent; system fonts only, for speed. */
:root {
  --paper: #faf8f4;
  --ink: #1d1f22;
  --muted: #5f646b;
  --line: #dedad2;
  --card: #ffffff;
  --accent: #b45f06;
  --accent-ink: #ffffff;
  --ok: #2f6b3a;
  --warn: #9a3412;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root { --paper: #141518; --ink: #ebe8e2; --muted: #a3a7ad; --line: #2e3035; --card: #1b1d21; --accent: #f0a04b; --accent-ink: #141518; --ok: #7cc48a; --warn: #f19a6b; color-scheme: dark; }
}
[hidden] { display: none !important; }
* { box-sizing: border-box; }
body { margin: 0; color: var(--ink); background: var(--paper); font: 16px/1.55 var(--sans); }
main { max-width: 860px; margin: 0 auto; padding: 8px 16px 48px; }
.draft { background: var(--warn); color: #fff; text-align: center; font-size: 14px; padding: 6px 16px; }
.top { border-bottom: 6px solid var(--ink); background-image: repeating-linear-gradient(90deg, var(--ink) 0 10px, transparent 10px 18px); background-size: 100% 6px; background-repeat: no-repeat; background-position: bottom; }
.top-in { max-width: 860px; margin: 0 auto; padding: 16px; display: flex; align-items: baseline; justify-content: space-between; gap: 12px 20px; flex-wrap: wrap; }
.mark { font-weight: 800; font-size: 22px; letter-spacing: -0.02em; color: var(--ink); text-decoration: none; }
.mark span { color: var(--accent); }
.top nav { display: flex; gap: 16px; flex-wrap: wrap; }
.top nav a { color: var(--ink); text-decoration: none; font-weight: 600; font-size: 16px; }
.top nav a[aria-current] { color: var(--accent); }
h1 { font-size: clamp(26px, 5vw, 38px); line-height: 1.15; letter-spacing: -0.02em; margin: 20px 0 8px; text-wrap: balance; }
h2 { font-size: 20px; margin: 28px 0 10px; text-wrap: balance; }
h3 { font-size: 17px; margin: 0 0 6px; }
p, li { max-width: 68ch; }
.lede { color: var(--muted); margin: 0 0 20px; }
main a { color: var(--accent); }
.tool { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 20px; display: grid; gap: 16px; }
.form { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 12px; align-items: end; }
.field { display: grid; gap: 4px; font-size: 14px; font-weight: 600; }
.field em { font-style: normal; color: var(--muted); font-weight: 400; }
.field input, .field select { font: inherit; font-weight: 400; padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px; background: var(--paper); color: var(--ink); min-width: 0; width: 100%; }
.field input { font-family: var(--mono); letter-spacing: 0.04em; }
button { font: inherit; font-weight: 700; padding: 11px 18px; border: 0; border-radius: 8px; background: var(--accent); color: var(--accent-ink); cursor: pointer; }
button:hover { filter: brightness(1.05); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.result { min-height: 48px; }
.result:empty { display: none; }
.verdict { font-size: clamp(20px, 3.5vw, 26px); font-weight: 800; margin: 0 0 6px; }
.verdict.ok { color: var(--ok); }
.verdict.warn { color: var(--warn); }
.error { color: var(--warn); font-weight: 600; margin: 0; }
.facts { width: 100%; border-collapse: collapse; font-size: 15px; }
.facts th { text-align: left; font-weight: 400; color: var(--muted); padding: 7px 12px 7px 0; }
.facts td { text-align: right; font-variant-numeric: tabular-nums; padding: 7px 0; font-weight: 600; }
.facts tr + tr { border-top: 1px solid var(--line); }
.recall { border: 1px solid var(--line); border-left: 4px solid var(--warn); border-radius: 8px; padding: 12px 14px; margin: 12px 0 0; }
.recall p { margin: 6px 0 0; font-size: 15px; }
.recall .meta { font-size: 13px; color: var(--muted); margin: 0; }
.slot { min-height: 250px; border: 1px dashed var(--line); border-radius: 8px; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; padding: 0; list-style: none; margin: 0; }
.cards li { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 18px; max-width: none; }
.cards a { text-decoration: none; }
.cards p { margin: 0; color: var(--muted); font-size: 15px; }
.note, .source { font-size: 14px; color: var(--muted); }
code { font-family: var(--mono); font-size: 0.95em; }
.foot { max-width: 860px; margin: 0 auto; padding: 24px 16px 40px; color: var(--muted); font-size: 14px; display: flex; gap: 8px 20px; flex-wrap: wrap; }
.foot a { color: var(--muted); }
@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; } }