:root {
  --bg: #ffffff; --panel: #f6f7f9; --text: #1b1f24; --muted: #5b6470; --line: #d5dae1;
  --accent: #1f6feb; --accent-text: #ffffff; --ok: #1a7f37; --bad: #b42318; --warn-bg: #fff4d6; --warn-text: #5c4400;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14171b; --panel: #1c2026; --text: #e8eaed; --muted: #9aa4b1; --line: #343b45;
    --accent: #5a9bff; --accent-text: #0b1220; --ok: #56d364; --bad: #ff8b82; --warn-bg: #3a3112; --warn-text: #f2d98b;
  }
}
* { box-sizing: border-box; }
/* Author styles that set display would otherwise show elements marked hidden. */
[hidden] { display: none !important; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif; }
.top { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; padding: 20px 16px 12px; max-width: 880px; margin: 0 auto; border-bottom: 1px solid var(--line); }
h1 { font-size: 1.35rem; margin: 0; }
h2 { font-size: 1.05rem; margin: 28px 0 8px; }
main { max-width: 880px; margin: 0 auto; padding: 16px; }
.muted, .hint { color: var(--muted); }
.hint { font-size: 0.9rem; margin: 4px 0 0; }
.who { display: flex; gap: 12px; align-items: center; white-space: nowrap; font-size: 0.95rem; }
.banner { background: var(--warn-bg); color: var(--warn-text); padding: 10px 12px; border-radius: 6px; }
.note { background: var(--panel); border: 1px solid var(--line); border-radius: 6px; padding: 10px 12px; }
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); margin-bottom: 16px; }
.tab { background: none; border: 0; border-bottom: 3px solid transparent; padding: 8px 14px; color: var(--muted); font: inherit; cursor: pointer; }
.tab[aria-selected="true"] { color: var(--text); border-bottom-color: var(--accent); font-weight: 600; }
fieldset { border: 1px solid var(--line); border-radius: 8px; margin: 0 0 16px; padding: 12px 14px 14px; }
legend { font-weight: 600; padding: 0 6px; }
.check { display: flex; gap: 8px; align-items: baseline; padding: 3px 0; }
.indent { margin: 8px 0 0 24px; }
.indent.off { opacity: 0.55; }
button, .button { font: inherit; padding: 7px 14px; border-radius: 6px; border: 1px solid var(--line); background: var(--panel); color: var(--text); cursor: pointer; text-decoration: none; display: inline-block; }
button.primary, .button.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); font-weight: 600; }
button.link { border: 0; background: none; color: var(--accent); padding: 0; }
button:disabled { opacity: 0.55; cursor: default; }
input[type="text"], input[type="search"] { font: inherit; padding: 6px 8px; border: 1px solid var(--line); border-radius: 6px; background: var(--bg); color: var(--text); min-width: 0; }
.actions { display: flex; gap: 12px; align-items: center; }
.result { font-size: 0.95rem; }
.result.ok { color: var(--ok); }
.result.bad { color: var(--bad); }
table { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
th, td { text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--line); vertical-align: middle; }
th { color: var(--muted); font-weight: 600; font-size: 0.85rem; }
.inline { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-top: 10px; }
.picker { border: 1px solid var(--line); border-radius: 8px; padding: 12px; margin-top: 12px; background: var(--panel); }
.picker ul { list-style: none; padding: 0; margin: 8px 0; max-height: 220px; overflow: auto; }
.picker li button { width: 100%; text-align: left; margin-bottom: 4px; }
.status { list-style: none; padding: 0; margin: 0; }
.status li { padding: 6px 0; border-bottom: 1px solid var(--line); }
.status .ok::before { content: "OK  "; color: var(--ok); font-weight: 600; }
.status .bad::before { content: "Problem  "; color: var(--bad); font-weight: 600; }
code { font-size: 0.9em; }
@media (max-width: 620px) {
  .top { flex-direction: column; }
  table, thead, tbody, tr, th, td { display: block; }
  thead { display: none; }
  tr { border-bottom: 1px solid var(--line); padding: 8px 0; }
  td { border: 0; padding: 2px 0; }
}
.search { position: relative; max-width: 520px; margin-top: 10px; }
.search input { width: 100%; }
.results { list-style: none; margin: 4px 0 0; padding: 4px; border: 1px solid var(--line); border-radius: 6px; background: var(--bg); max-height: 280px; overflow: auto; }
.results li button { display: block; width: 100%; text-align: left; border: 0; background: none; padding: 6px 8px; border-radius: 4px; }
.results li button:hover, .results li button:focus { background: var(--panel); }
.results li button:disabled { opacity: 0.6; cursor: default; }
.results .sub { color: var(--muted); font-size: 0.9em; margin-left: 6px; }
.results li.empty { padding: 6px 8px; color: var(--muted); }