:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #6b7280;
  --line: #e2e5ea;
  --card: #f7f8fa;
  --accent: #2563eb;
  --good: #16a34a;
  --amber: #d97706;
  --bad: #dc2626;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --fg: #e8eaed;
    --muted: #9aa1ac;
    --line: #262a31;
    --card: #171a20;
    --accent: #60a5fa;
    --good: #4ade80;
    --amber: #fbbf24;
    --bad: #f87171;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  max-width: 780px;
  margin-inline: auto;
  padding: 1rem 1rem 4rem;
}

.banner {
  background: var(--amber);
  color: #1a1a1a;
  padding: .6rem 1rem;
  border-radius: .5rem;
  margin-bottom: 1rem;
  font-weight: 600;
}

.topbar { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.topbar h1 { margin: 0; font-size: 1.5rem; }
.quota { font-size: .85rem; color: var(--muted); }
.quota.warn { color: var(--bad); font-weight: 600; }

.tabs { display: flex; gap: .5rem; margin: 1rem 0; border-bottom: 1px solid var(--line); }
.tab {
  background: none; border: none; color: var(--muted);
  padding: .5rem .25rem; margin-bottom: -1px;
  border-bottom: 2px solid transparent; cursor: pointer; font: inherit;
}
.tab.active { color: var(--fg); border-bottom-color: var(--accent); font-weight: 600; }

.controls { display: flex; gap: 1rem; flex-wrap: wrap; margin-bottom: 1rem; }
.field { display: flex; flex-direction: column; gap: .25rem; font-size: .8rem; color: var(--muted); }
.field.grow { flex: 1; min-width: 220px; }
.custom-row { display: flex; gap: .5rem; }
.custom-row input { flex: 1; }
select, input[type="text"] {
  font: inherit; padding: .45rem .6rem; border: 1px solid var(--line);
  border-radius: .5rem; background: var(--bg); color: var(--fg);
}

.sentence {
  font-size: 1.6rem; line-height: 1.4; font-weight: 600;
  padding: 1.25rem; background: var(--card); border-radius: .75rem;
  border: 1px solid var(--line); text-align: center; margin-bottom: 1rem;
}

.record-area { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; }
.record-btn {
  display: inline-flex; align-items: center; gap: .5rem;
  font: inherit; font-weight: 600; padding: .7rem 1.4rem;
  border-radius: 999px; border: 1px solid var(--accent); color: var(--accent);
  background: transparent; cursor: pointer;
}
.record-btn .dot { width: .7rem; height: .7rem; border-radius: 50%; background: var(--accent); }
.record-btn.on { background: var(--bad); border-color: var(--bad); color: #fff; }
.record-btn.on .dot { background: #fff; animation: pulse 1s infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .3; } }

.meter { flex: 1; min-width: 120px; height: 10px; background: var(--card); border: 1px solid var(--line); border-radius: 999px; overflow: hidden; }
.meter-fill { height: 100%; width: 0%; background: var(--good); transition: width .05s linear; }
.rec-status { flex-basis: 100%; font-size: .85rem; }

.session-btns { display: flex; gap: .5rem; margin: 1rem 0; }
.btn {
  font: inherit; padding: .45rem .9rem; border-radius: .5rem;
  border: 1px solid var(--line); background: var(--card); color: var(--fg); cursor: pointer;
}
.btn:hover { border-color: var(--accent); }
.btn:disabled { opacity: .4; cursor: not-allowed; }
kbd {
  font: .75em monospace; background: var(--bg); border: 1px solid var(--line);
  border-radius: .3rem; padding: 0 .3rem;
}

/* scores */
.scores { display: flex; gap: 1rem; flex-wrap: wrap; margin-bottom: 1rem; }
.score { text-align: center; min-width: 64px; }
.score.headline .score-val { font-size: 2.4rem; }
.score-val { font-size: 1.4rem; font-weight: 700; }
.score-label { font-size: .7rem; color: var(--muted); text-transform: uppercase; letter-spacing: .03em; }
.muted-note .score-val, .muted-note { color: var(--muted); font-size: 1.4rem; font-weight: 700; }

/* word grid */
.word-grid { display: flex; flex-wrap: wrap; gap: .4rem; margin-bottom: 1rem; }
.word {
  font: inherit; font-size: 1.15rem; padding: .3rem .6rem; cursor: pointer;
  border: none; border-bottom: 3px solid var(--wc, var(--muted));
  background: transparent; color: var(--fg); border-radius: .3rem .3rem 0 0;
}
.word:hover { background: var(--card); }
.word.omission { text-decoration: line-through; color: var(--muted); border-bottom-color: var(--muted); }
.word.insertion { border-bottom-style: dashed; border-bottom-color: var(--accent); font-style: italic; }

/* word panel */
.word-panel { background: var(--card); border: 1px solid var(--line); border-radius: .75rem; padding: 1rem; }
.wp-head { display: flex; align-items: baseline; gap: .75rem; margin-bottom: .75rem; }
.wp-word { font-size: 1.3rem; }
.wp-error { font-size: .75rem; color: var(--bad); border: 1px solid var(--bad); border-radius: .3rem; padding: 0 .3rem; }
.wp-score { margin-left: auto; font-weight: 700; }
.wp-audio { display: flex; gap: .5rem; margin-bottom: 1rem; }
.wp-label { font-size: .75rem; color: var(--muted); text-transform: uppercase; margin-bottom: .3rem; }
.phonemes { display: flex; flex-wrap: wrap; gap: .4rem; margin-bottom: 1rem; }
.phoneme {
  display: inline-flex; align-items: baseline; gap: .25rem;
  border: 1px solid var(--wc); border-radius: .4rem; padding: .2rem .45rem;
}
.phoneme .ipa { font-size: 1.05rem; color: var(--wc); font-weight: 600; }
.phoneme .pscore { font-size: .7rem; color: var(--muted); }
.hint { border-left: 3px solid var(--amber); padding: .5rem .75rem; margin-top: .5rem; background: var(--bg); border-radius: 0 .4rem .4rem 0; }
.hint-head { font-weight: 600; }
.hint-body { color: var(--muted); margin-top: .25rem; }

/* progress */
.progress-actions { display: flex; gap: .5rem; margin-bottom: 1rem; }
.file-btn { display: inline-block; }
#progress-view h2 { font-size: 1rem; margin: 1.25rem 0 .5rem; }

.toast {
  position: fixed; left: 50%; bottom: 1.5rem; transform: translateX(-50%);
  background: var(--fg); color: var(--bg); padding: .6rem 1rem; border-radius: .5rem;
  max-width: 90vw; box-shadow: 0 4px 20px rgba(0,0,0,.25);
}