:root {
  --bg: #f6f4f8;
  --card: #ffffff;
  --text: #1d1b22;
  --muted: #6b6676;
  --border: #e3dfe9;
  --accent: #8a4fd8;
  --accent-text: #ffffff;
  --in: #1fa971;
  --out: #e0803a;
  --target: rgba(31, 169, 113, 0.14);
  --target-edge: rgba(31, 169, 113, 0.65);
  --low: rgba(80, 140, 230, 0.12);
  --high: rgba(220, 90, 170, 0.12);
  --grid: rgba(0, 0, 0, 0.08);
  --gridtext: #8a8496;
  --ref: #8a4fd8;
  --plot: #fbfafc;
  --low-edge: rgba(60, 120, 220, 0.7);
  --high-edge: rgba(210, 70, 160, 0.7);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #131118;
    --card: #1c1a23;
    --text: #ece9f2;
    --muted: #9b95a8;
    --border: #2d2a36;
    --accent: #a873f0;
    --accent-text: #120f17;
    --in: #3ccf8e;
    --out: #f39a55;
    --target: rgba(60, 207, 142, 0.13);
    --target-edge: rgba(60, 207, 142, 0.6);
    --low: rgba(100, 160, 255, 0.10);
    --high: rgba(240, 110, 190, 0.10);
    --grid: rgba(255, 255, 255, 0.07);
    --gridtext: #7d7789;
    --ref: #c49bff;
    --plot: #17151d;
    --low-edge: rgba(110, 165, 255, 0.75);
    --high-edge: rgba(245, 120, 200, 0.75);
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
header, main, footer { max-width: 1000px; margin: 0 auto; padding: 0 16px; }
header { padding-top: 20px; }
h1 { margin: 0; font-size: 1.6rem; letter-spacing: -0.02em; }
.sub { margin: 4px 0 14px; color: var(--muted); }
h2 { font-size: 1rem; margin: 0 0 10px; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.hint { font-weight: 400; font-size: 0.8rem; color: var(--muted); }
footer { color: var(--muted); font-size: 0.8rem; padding: 18px 16px 30px; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px;
  margin-bottom: 14px;
}
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.grid2 .card { margin-bottom: 0; }
.grid2 { margin-bottom: 14px; }
@media (max-width: 720px) { .grid2 { grid-template-columns: 1fr; } }

button, select, input {
  font: inherit;
  color: var(--text);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 9px;
  padding: 7px 12px;
}
button { cursor: pointer; }
button:hover:not(:disabled) { border-color: var(--accent); }
button:disabled, select:disabled { opacity: 0.45; cursor: default; }
button.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); font-weight: 600; }
button.small { padding: 3px 9px; font-size: 0.8rem; font-weight: 400; margin-left: auto; }
.toolbar { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
.toolbar select { max-width: 100%; min-width: 0; flex: 1 1 200px; }

.readout { display: grid; grid-template-columns: auto auto 1fr; align-items: center; gap: 8px 22px; }
.big { font-size: 2.8rem; font-weight: 700; font-variant-numeric: tabular-nums; line-height: 1; }
.big small { font-size: 1rem; font-weight: 500; color: var(--muted); margin-left: 4px; }
.big.in { color: var(--in); }
.big.out { color: var(--out); }
.note { font-size: 1.4rem; color: var(--muted); font-variant-numeric: tabular-nums; min-width: 3.5em; }
.vol { display: flex; align-items: center; gap: 10px; }
.meter { flex: 1; height: 10px; background: var(--border); border-radius: 6px; overflow: hidden; }
#volBar { height: 100%; width: 0; background: var(--accent); transition: width 60ms linear; }
#db { font-variant-numeric: tabular-nums; color: var(--muted); min-width: 4.5em; text-align: right; }
.status { grid-column: 1 / -1; color: var(--muted); font-size: 0.85rem; }
@media (max-width: 560px) {
  .readout { grid-template-columns: auto 1fr; }
  .vol { grid-column: 1 / -1; }
}

canvas { display: block; width: 100%; border-radius: 9px; background: var(--plot); }
canvas.pitch { height: 300px; }
canvas.spec { height: 160px; background: #000033; }

.tag { font-size: 0.75rem; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; color: var(--accent); border: 1px solid var(--accent); border-radius: 999px; padding: 2px 8px; vertical-align: 5px; margin-left: 6px; }
.vowelgrid { display: grid; grid-template-columns: 2fr 1fr; gap: 14px; align-items: start; }
@media (max-width: 720px) { .vowelgrid { grid-template-columns: 1fr; } }
canvas.vowel { height: 320px; }
.formants .fv { display: flex; align-items: baseline; gap: 8px; font-variant-numeric: tabular-nums; font-size: 1.6rem; font-weight: 700; line-height: 1.35; }
.formants .fl { font-size: 0.85rem; font-weight: 600; color: var(--muted); width: 1.8em; }
.formants small { font-size: 0.85rem; font-weight: 500; color: var(--muted); }
.formants .hint { margin: 10px 0 0; }
.sw.trail { background: var(--ref); border-radius: 50%; }
.sw.lowtri { background: var(--low); border: 2px solid var(--low-edge); }
.sw.hightri { background: var(--high); border: 2px solid var(--high-edge); }

.legend { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 8px; font-size: 0.8rem; color: var(--muted); }
.legend .sw { display: inline-block; width: 12px; height: 12px; border-radius: 3px; margin-right: 5px; vertical-align: -2px; }
.sw.target { background: var(--target); border: 1px solid var(--target-edge); }
.sw.in { background: var(--in); }
.sw.out { background: var(--out); }
.sw.low { background: var(--low); border: 1px solid var(--border); }
.sw.high { background: var(--high); border: 1px solid var(--border); }
.legend.nobands .bandlegend { display: none; }

table.stats { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
table.stats th, table.stats td { text-align: right; padding: 5px 4px; border-bottom: 1px solid var(--border); }
table.stats th:first-child, table.stats td:first-child { text-align: left; color: var(--muted); }
table.stats th { font-weight: 500; font-size: 0.85rem; color: var(--muted); }

.form { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 12px; }
.form label { display: flex; flex-direction: column; gap: 3px; font-size: 0.82rem; color: var(--muted); }
.form label.check { flex-direction: row; align-items: center; gap: 8px; grid-column: 1 / -1; color: var(--text); font-size: 0.9rem; }
.form input[type=number], .form input[type=text] { width: 100%; }
details { margin-top: 12px; }
summary { cursor: pointer; color: var(--accent); font-size: 0.9rem; margin-bottom: 8px; }

.tones { display: grid; grid-template-columns: repeat(auto-fill, minmax(64px, 1fr)); gap: 6px; }
.tones button { padding: 6px 4px; display: flex; flex-direction: column; align-items: center; line-height: 1.15; }
.tones button small { font-size: 0.7rem; color: var(--muted); }
.tones button.sharp { background: var(--bg); }
.tones button.intarget { border-color: var(--in); box-shadow: inset 0 -3px 0 var(--in); }
.custom { display: flex; align-items: flex-end; gap: 8px; margin-top: 10px; flex-wrap: wrap; }
.custom label { display: flex; flex-direction: column; font-size: 0.82rem; color: var(--muted); gap: 3px; }
.custom input { width: 110px; }

.sentence { font-size: 1.25rem; margin: 4px 0; line-height: 1.5; }