:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --ink: #1c2733;
  --muted: #5b6b7b;
  --accent: #0b7a5c;
  --accent-ink: #ffffff;
  --border: #dde3ea;
  --error: #b3261e;
  --heat: 11, 122, 92; /* rgb of --accent, used for heatmap alpha */
}

* { box-sizing: border-box; }

/* keep the hidden attribute working on elements we give display:flex */
[hidden] { display: none !important; }

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--ink);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.site-header {
  padding: 2.2rem 1rem 1.4rem;
  text-align: center;
}
.site-header h1 {
  margin: 0;
  font-size: 2.2rem;
  letter-spacing: -0.02em;
}
.site-header .za { color: var(--accent); }
.tagline {
  margin: 0.4rem auto 0;
  max-width: 34rem;
  color: var(--muted);
}

main {
  flex: 1;
  width: 100%;
  max-width: 46rem;
  margin: 0 auto;
  padding: 0 1rem 2rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.1rem 1.2rem;
  box-shadow: 0 1px 3px rgba(28, 39, 51, 0.06);
}

.controls {
  display: flex;
  gap: 0.8rem;
  align-items: flex-end;
  flex-wrap: wrap;
}
.field {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}
.field.grow { flex: 1 1 12rem; }
.field label {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
}
select, input[type="text"] {
  font: inherit;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  min-width: 11rem;
}
input[type="text"]:focus, select:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  border-color: var(--accent);
}
button {
  font: inherit;
  font-weight: 600;
  padding: 0.6rem 1.3rem;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: var(--accent-ink);
  cursor: pointer;
}
button:hover { filter: brightness(1.08); }
button:disabled { opacity: 0.55; cursor: wait; }

.error {
  margin: 0.9rem 0 0;
  padding: 0.7rem 1rem;
  border: 1px solid color-mix(in srgb, var(--error) 35%, white);
  border-radius: 8px;
  background: color-mix(in srgb, var(--error) 7%, white);
  color: var(--error);
}

.result { margin-top: 1rem; }
.result-head {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  flex-wrap: wrap;
}
.result-word {
  font-size: 1.35rem;
  font-weight: 700;
}
.result-arrow { color: var(--muted); }
.phonemes {
  display: inline-flex;
  gap: 0.35rem;
  flex-wrap: wrap;
}
.phoneme {
  font-family: Consolas, "Cascadia Mono", monospace;
  font-size: 1.02rem;
  background: color-mix(in srgb, var(--accent) 11%, white);
  border: 1px solid color-mix(in srgb, var(--accent) 30%, white);
  color: var(--accent);
  border-radius: 6px;
  padding: 0.15rem 0.5rem;
}

.audio-row {
  margin-top: 0.9rem;
  display: flex;
  align-items: center;
  gap: 0.7rem;
  flex-wrap: wrap;
}
.play-btn { padding: 0.4rem 0.9rem; }
.audio-note {
  font-size: 0.82rem;
  color: var(--muted);
  max-width: 28rem;
}

#heatmap-block { margin-top: 1.4rem; }
#heatmap-block h2 {
  font-size: 1rem;
  margin: 0 0 0.25rem;
}
.heatmap-explain {
  margin: 0 0 0.8rem;
  font-size: 0.85rem;
  color: var(--muted);
}
.heatmap-scroll { overflow-x: auto; padding-bottom: 0.3rem; }
.heatmap-table { border-collapse: collapse; }
.heatmap-table th {
  font-family: Consolas, "Cascadia Mono", monospace;
  font-weight: 600;
  font-size: 0.85rem;
  padding: 0.25rem 0.45rem;
  color: var(--ink);
}
.heatmap-table th.row-label { text-align: right; }
.heatmap-table td.cell {
  width: 2rem;
  height: 1.7rem;
  min-width: 2rem;
  border: 1px solid var(--border);
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1rem;
  text-align: center;
  font-size: 0.82rem;
  color: var(--muted);
}
.site-footer a { color: var(--accent); }

@media (max-width: 520px) {
  .controls { align-items: stretch; flex-direction: column; }
  .field label { font-size: 0.72rem; }
  select, input[type="text"] { min-width: 0; width: 100%; }
  button { width: 100%; }
  .site-header h1 { font-size: 1.8rem; }
}