:root {
  --bg: #fafaf9;
  --fg: #1c1917;
  --muted: #57534e;
  --line: #d6d3d1;
  --card: #ffffff;
  --accent: #1d4ed8;
  --accent-fg: #ffffff;
  --warn-bg: #fef3c7;
  --warn-fg: #78350f;
  --bad: #b91c1c;
  --good: #15803d;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1c1917;
    --fg: #f5f5f4;
    --muted: #a8a29e;
    --line: #44403c;
    --card: #292524;
    --accent: #60a5fa;
    --accent-fg: #0c0a09;
    --warn-bg: #422006;
    --warn-fg: #fde68a;
    --bad: #f87171;
    --good: #4ade80;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 15px/1.6 system-ui, -apple-system, "Hiragino Sans", "Noto Sans JP", sans-serif;
}
main { max-width: 760px; margin: 0 auto; padding: 16px 16px 48px; }
h1 { font-size: 1.35rem; margin: 0.2em 0 0.4em; }
h2 { font-size: 1.1rem; margin: 0 0 0.6em; }
a { color: var(--accent); }
section, footer {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px;
  margin: 14px 0;
}
.lead { margin: 0 0 0.6em; }
.steps { margin: 0 0 0.4em; padding-left: 1.4em; color: var(--muted); }
.hint { color: var(--muted); font-size: 0.88rem; margin: 0.5em 0; }
.note.warn, .banner {
  background: var(--warn-bg);
  color: var(--warn-fg);
  border-radius: 8px;
  padding: 10px 12px;
}
.banner { margin: 14px 0; }
.controls { display: flex; flex-wrap: wrap; gap: 8px 14px; margin: 6px 0; }
.controls label { display: flex; flex-direction: column; font-size: 0.85rem; color: var(--muted); gap: 2px; min-width: 0; }
.controls.checks label { flex-direction: row; align-items: center; gap: 6px; color: var(--fg); font-size: 0.95rem; }
select, button, textarea { font: inherit; color: inherit; }
select { padding: 6px 8px; border: 1px solid var(--line); border-radius: 6px; background: var(--bg); max-width: 100%; }
.buttons { display: flex; flex-wrap: wrap; gap: 8px; margin: 10px 0; }
button {
  padding: 10px 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg);
  min-height: 44px;
  cursor: pointer;
}
button.primary { background: var(--accent); color: var(--accent-fg); border-color: var(--accent); font-weight: 600; }
button:disabled { opacity: 0.45; cursor: default; }
.status { margin: 6px 0; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.switch { display: flex; align-items: center; gap: 8px; font-weight: 600; }
.switch input { width: 22px; height: 22px; }
.scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; max-width: 100%; }
table { border-collapse: collapse; width: 100%; font-size: 0.86rem; font-variant-numeric: tabular-nums; }
th, td { border-bottom: 1px solid var(--line); padding: 5px 6px; text-align: left; vertical-align: top; }
th { color: var(--muted); font-weight: 600; white-space: nowrap; }
table.kv td:first-child { color: var(--muted); width: 36%; overflow-wrap: anywhere; }
table.kv td { overflow-wrap: anywhere; }
table.res td.num, table.res th.num { text-align: right; white-space: nowrap; }
table.log td:first-child { white-space: nowrap; }
.err { color: var(--bad); }
.ok { color: var(--good); }
details { margin: 6px 0; }
summary { cursor: pointer; color: var(--accent); }
.utt { font-size: 0.82rem; border-bottom: 1px dashed var(--line); padding: 4px 0; overflow-wrap: anywhere; }
.utt .ref { color: var(--muted); }
.progress { height: 10px; background: var(--line); border-radius: 5px; overflow: hidden; margin: 8px 0 4px; }
.progress > div { height: 100%; width: 0; background: var(--accent); transition: width 0.3s; }
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg);
  padding: 8px;
  font: 12px/1.4 ui-monospace, SFMono-Regular, Menlo, monospace;
}
footer ul { padding-left: 1.2em; font-size: 0.86rem; }
footer li { margin: 0.3em 0; overflow-wrap: anywhere; }