:root {
  --bg: #fbfaf7;
  --panel: #ffffff;
  --fg: #1d1d1b;
  --muted: #5f5e58;
  --border: #d9d6cc;
  --grid: #e9e6de;
  --accent: #1f5fbf;
  --accent-fg: #ffffff;
  --vad: #1a7f5a;
  --score: #1f5fbf;
  --det: #b4361f;
  --focus: #e0a100;
  --mark-bg: #ffe08a;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #141413;
    --panel: #1d1d1b;
    --fg: #ece9e1;
    --muted: #a9a59b;
    --border: #3a3935;
    --grid: #2c2b28;
    --accent: #7fb0ff;
    --accent-fg: #0d1b30;
    --vad: #5fd3a3;
    --score: #7fb0ff;
    --det: #ff8a70;
    --mark-bg: #6b5410;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #141413;
  --panel: #1d1d1b;
  --fg: #ece9e1;
  --muted: #a9a59b;
  --border: #3a3935;
  --grid: #2c2b28;
  --accent: #7fb0ff;
  --accent-fg: #0d1b30;
  --vad: #5fd3a3;
  --score: #7fb0ff;
  --det: #ff8a70;
  --mark-bg: #6b5410;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0 auto;
  max-width: 760px;
  padding: 16px;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif;
}
header { display: flex; gap: 12px; align-items: flex-start; justify-content: space-between; }
h1 { margin: 0; font-size: 1.6rem; letter-spacing: -0.01em; }
h2 { margin: 0 0 8px; font-size: 1.05rem; }
.lede { margin: 4px 0 0; color: var(--muted); }
section {
  margin: 16px 0;
  padding: 14px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
}
.row { display: flex; flex-wrap: wrap; gap: 8px; align-items: flex-end; margin-bottom: 8px; }
.grow { flex: 1 1 220px; min-width: 0; }
label { display: block; font-size: 0.9rem; color: var(--muted); }
input[type="text"], select {
  display: block;
  width: 100%;
  margin-top: 4px;
  padding: 9px 10px;
  font: inherit;
  color: var(--fg);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
}
input[type="range"] { display: block; width: 100%; accent-color: var(--accent); }
button, .button {
  display: inline-block;
  min-height: 44px;
  padding: 10px 14px;
  font: inherit;
  font-weight: 600;
  color: var(--accent-fg);
  background: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 8px;
  cursor: pointer;
}
.button { color: var(--accent-fg); font-size: 1rem; }
button.ghost { color: var(--fg); background: transparent; border-color: var(--border); }
button:disabled, .button.disabled { opacity: 0.45; cursor: not-allowed; }
button:focus-visible, .button:focus-within, input:focus-visible, a:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}
.sliders { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 520px) { .sliders { grid-template-columns: 1fr; } }
output { color: var(--fg); font-variant-numeric: tabular-nums; font-weight: 600; }
.status { margin: 4px 0 0; color: var(--muted); font-size: 0.92rem; overflow-wrap: anywhere; }
.ipa { font-family: "Noto Sans", "Doulos SIL", "Charis SIL", system-ui, sans-serif; }
canvas { display: block; width: 100%; height: 300px; border-radius: 6px; background: var(--bg); }
.readout { display: grid; grid-template-columns: max-content 1fr; gap: 6px 12px; margin: 12px 0 0; }
.readout dt { color: var(--muted); font-size: 0.9rem; }
.readout dd { margin: 0; overflow-wrap: anywhere; font-variant-numeric: tabular-nums; }
.readout ul { margin: 0; padding-left: 18px; }
.muted { color: var(--muted); list-style: none; margin-left: -18px; }
footer { color: var(--muted); font-size: 0.85rem; }
a { color: var(--accent); }
code { font-size: 0.9em; }
.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  margin: -1px; padding: 0; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
fieldset.mode { display: flex; flex-wrap: wrap; gap: 4px 16px; margin: 0 0 8px; padding: 0; border: 0; }
fieldset.mode legend { padding: 0; margin-bottom: 4px; font-size: 0.9rem; color: var(--muted); }
fieldset.mode label { display: flex; gap: 6px; align-items: center; color: var(--fg); font-size: 0.95rem; min-height: 32px; }
fieldset.mode input { accent-color: var(--accent); width: 18px; height: 18px; margin: 0; }
.lang { flex: 1 1 200px; min-width: 0; }
.lang[hidden] { display: none; }
select { min-height: 44px; }
mark { background: var(--mark-bg); color: var(--fg); border-radius: 3px; padding: 0 2px; }
.status.error { color: var(--det); }