:root {
  --bg: #ffffff;
  --fg: #1a1d21;
  --muted: #5b6470;
  --line: #d9dee4;
  --accent: #1d5fd1;
  --accent-fg: #ffffff;
  --card: #f5f7fa;
  --ok: #17794a;
  --warn: #9a6200;
  --bad: #b3261e;
  --soft-ok: #e4f4ec;
  --soft-warn: #fdf0d5;
  --soft-bad: #fbe4e2;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14171b;
    --fg: #e8ebef;
    --muted: #9aa3ae;
    --line: #2d333b;
    --accent: #6ea1ff;
    --accent-fg: #0c1220;
    --card: #1c2128;
    --ok: #52c78a;
    --warn: #e8b64a;
    --bad: #ff8a80;
    --soft-ok: #15302300;
    --soft-warn: #3a2f1400;
    --soft-bad: #3d1d1b00;
  }
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
.wrap { max-width: 880px; margin: 0 auto; padding: 0 16px; }
.site-header { border-bottom: 1px solid var(--line); }
.site-header .wrap { display: flex; flex-wrap: wrap; gap: 8px 20px; align-items: center; padding-top: 12px; padding-bottom: 12px; }
.brand { font-weight: 700; color: var(--fg); text-decoration: none; font-size: 1.1rem; }
nav { display: flex; flex-wrap: wrap; gap: 4px 16px; }
nav a { color: var(--muted); text-decoration: none; }
nav a[aria-current="page"], nav a:hover { color: var(--fg); text-decoration: underline; }
main { padding-top: 24px; padding-bottom: 40px; }
h1 { font-size: 1.8rem; line-height: 1.2; margin: 0 0 8px; }
h2 { font-size: 1.25rem; margin: 28px 0 8px; }
h3 { font-size: 1.05rem; margin: 20px 0 6px; }
p, li { max-width: 70ch; }
a { color: var(--accent); }
.lead { color: var(--muted); font-size: 1.05rem; margin-top: 0; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 16px; margin: 16px 0; }
.grid { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); }
label { display: block; font-weight: 600; margin: 10px 0 4px; font-size: 0.92rem; }
input, select, textarea, button {
  font: inherit; color: var(--fg); background: var(--bg);
  border: 1px solid var(--line); border-radius: 6px; padding: 8px 10px; max-width: 100%;
}
input, select, textarea { width: 100%; }
button, .btn {
  cursor: pointer; background: var(--accent); color: var(--accent-fg);
  border-color: var(--accent); font-weight: 600; text-decoration: none; display: inline-block;
}
button.secondary, .btn.secondary { background: transparent; color: var(--accent); }
button:disabled { opacity: 0.5; cursor: not-allowed; }
button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible, a:focus-visible {
  outline: 3px solid var(--accent); outline-offset: 2px;
}
.row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin: 12px 0; }
table { width: 100%; border-collapse: collapse; margin: 12px 0; font-size: 0.95rem; }
th, td { text-align: left; padding: 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; }
.table-scroll { overflow-x: auto; }
.badge { display: inline-block; padding: 1px 8px; border-radius: 99px; font-size: 0.8rem; font-weight: 700; border: 1px solid currentColor; }
.badge.ok { color: var(--ok); }
.badge.warn { color: var(--warn); }
.badge.bad { color: var(--bad); }
.muted { color: var(--muted); }
.small { font-size: 0.88rem; }
pre, code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.88rem; }
pre { background: var(--card); border: 1px solid var(--line); border-radius: 6px; padding: 12px; overflow-x: auto; }
.notice { border-left: 4px solid var(--warn); padding: 8px 12px; background: var(--card); margin: 16px 0; }
.dropzone { border: 2px dashed var(--line); border-radius: 8px; padding: 28px 16px; text-align: center; }
.dropzone.over { border-color: var(--accent); }
.site-footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 0.9rem; padding: 16px 0 32px; }
.visually-hidden { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }