/* Plain and high-contrast on purpose: black on white, one accent, no framework. */
:root {
  --ink: #111;
  --paper: #fff;
  --muted: #555;
  --rule: #ccc;
  --accent: #0b4f9c;
  --green: #0a6b2e;
  --yellow: #8a6100;
  --red: #b00020;
  --red-bg: #fde8eb;
  --yellow-bg: #fff4d6;
  --green-bg: #e3f4e8;
}
* { box-sizing: border-box; }
body { margin: 0; font: 16px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif; color: var(--ink); background: var(--paper); }
a { color: var(--accent); }
a:focus, button:focus, input:focus, select:focus, textarea:focus { outline: 3px solid var(--accent); outline-offset: 2px; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 8px; background: var(--paper); padding: 4px 8px; }
header.site { display: flex; flex-wrap: wrap; align-items: center; gap: 24px; padding: 12px 16px; border-bottom: 2px solid var(--ink); }
header.site .brand { font-weight: 700; }
header.site nav { display: flex; gap: 16px; flex: 1; }
main { max-width: 1200px; margin: 0 auto; padding: 16px; }
h1 { font-size: 1.6rem; margin: 8px 0 16px; }
h2 { font-size: 1.25rem; margin: 32px 0 8px; border-bottom: 1px solid var(--rule); padding-bottom: 4px; }
h3 { font-size: 1.05rem; margin: 16px 0 4px; }
table { border-collapse: collapse; width: 100%; margin: 8px 0 16px; }
th, td { text-align: left; vertical-align: top; padding: 6px 8px; border-bottom: 1px solid var(--rule); }
thead th { border-bottom: 2px solid var(--ink); }
td.num { font-variant-numeric: tabular-nums; text-align: right; }
tr.disagree td { background: var(--yellow-bg); font-weight: 600; }
.muted { color: var(--muted); font-weight: normal; }
.blank { color: var(--muted); font-style: italic; }
.chip { display: inline-block; padding: 0 6px; border: 1px solid currentColor; border-radius: 3px; font-size: .85rem; font-weight: 600; }
.chip-green { color: var(--green); background: var(--green-bg); }
.chip-yellow { color: var(--yellow); background: var(--yellow-bg); }
.chip-red { color: var(--red); background: var(--red-bg); }
.sev-high { color: var(--red); font-weight: 700; }
.sev-medium { color: var(--yellow); font-weight: 700; }
.box { border: 2px solid var(--ink); padding: 8px 16px; margin: 16px 0; }
.box.ok { border-color: var(--green); }
.box.warn { border-color: var(--red); }
.box h2 { border: 0; margin: 8px 0; }
.error { color: var(--red); font-weight: 600; border-left: 4px solid var(--red); padding-left: 8px; }
.ok-text { color: var(--green); font-weight: 600; }
.fact, .question { border-top: 1px solid var(--rule); padding: 8px 0; }
form.stack { display: flex; flex-direction: column; gap: 4px; max-width: 520px; }
form.inline { display: inline; }
.filters { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
input, select, textarea, button { font: inherit; padding: 6px 8px; border: 1px solid var(--ink); border-radius: 2px; }
button { background: var(--ink); color: var(--paper); cursor: pointer; }
header.site button { background: var(--paper); color: var(--ink); }
code.secret { word-break: break-all; font-size: 1rem; }
.qr svg { width: 240px; height: 240px; }
ul.history { padding-left: 20px; }
@media (max-width: 700px) { table { display: block; overflow-x: auto; } }