:root {
  --bg: #f6f5f1;
  --card: #ffffff;
  --ink: #1d1d1b;
  --muted: #5f5d57;
  --line: #dcd9d0;
  --accent: #1f5f8b;
  --ok: #1d6b3a;
  --bad: #a3271f;
  --ok-bg: #e7f3ea;
  --bad-bg: #fbe9e7;
  --code: #f0eee8;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141412;
    --card: #1e1e1b;
    --ink: #eceae4;
    --muted: #aaa79f;
    --line: #36352f;
    --accent: #7db7e0;
    --ok: #7fd39a;
    --bad: #f19a8f;
    --ok-bg: #1b3324;
    --bad-bg: #3a1d1a;
    --code: #2a2a26;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--ink); }
body { font: 16px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
main { max-width: 1200px; margin: 0 auto; padding: 12px 16px 16px; }
header h1 { font-size: 30px; line-height: 1.15; margin: 4px 0 6px; }
.eyebrow { margin: 0; color: var(--muted); font-size: 13px; letter-spacing: .02em; }
.lede { margin: 0 0 12px; color: var(--muted); max-width: 70ch; }
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; align-items: start; }
.stack { display: grid; gap: 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; }
.tag { margin: 0 0 8px; font-size: 13px; font-weight: 600; color: var(--accent); text-transform: none; }
.question { font-size: 18px; font-weight: 600; margin: 0 0 10px; }
.facts { margin: 0; display: grid; gap: 8px; }
.facts div { display: grid; gap: 1px; }
.facts.row { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
dt { font-size: 12px; color: var(--muted); }
dd { margin: 0; font-weight: 500; }
dd.big { font-size: 34px; font-weight: 700; line-height: 1.1; }
.outcome { color: var(--bad); }
.status-ok { color: var(--ok); font-weight: 700; }
.note { margin: 8px 0 0; font-size: 13px; color: var(--muted); }
code { background: var(--code); padding: 1px 5px; border-radius: 4px; font-size: .92em; }
.hash { font: 12px/1.3 ui-monospace, SFMono-Regular, Menlo, monospace; background: var(--code); color: var(--ink);
  border: 1px solid var(--line); border-radius: 4px; padding: 1px 6px; cursor: pointer; word-break: break-all; text-align: left; }
.explain { margin: 0 0 6px; }
.which { margin: 6px 0 0; font-weight: 600; }
.result { margin: 10px 0; padding: 8px 10px; border-radius: 6px; font-weight: 700; border: 1px solid var(--line); }
.result.ok { background: var(--ok-bg); color: var(--ok); border-color: var(--ok); }
.result.bad { background: var(--bad-bg); color: var(--bad); border-color: var(--bad); }
.actions { display: flex; flex-wrap: wrap; gap: 10px; }
.button { font: inherit; font-weight: 600; padding: 8px 14px; border-radius: 6px; border: 1px solid var(--accent);
  background: var(--accent); color: var(--card); cursor: pointer; text-decoration: none; display: inline-block; }
.button.secondary { background: transparent; color: var(--accent); }
.button:disabled { opacity: .45; cursor: not-allowed; }
.button.link { margin-top: 10px; }
.button:focus-visible, .hash:focus-visible, a:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
footer { margin-top: 10px; font-size: 13px; color: var(--muted); }
footer p { margin: 4px 0; }
a { color: var(--accent); }
@media (max-width: 820px) {
  .grid { grid-template-columns: 1fr; }
  header h1 { font-size: 24px; }
  .facts.row { grid-template-columns: 1fr 1fr; }
}