:root {
  --bg: #f6f7fb; --panel: #fff; --ink: #1a2233; --muted: #5d6880; --line: #dfe3ee;
  --accent: #c8102e; --accent-ink: #fff; --soft: #fdecef; --good: #14804a; --bad: #c0271e; --warn: #9a6200;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #11141c; --panel: #1a1f2b; --ink: #e9ecf4; --muted: #9aa5bd; --line: #2c3446;
    --accent: #ff5a70; --accent-ink: #14060a; --soft: #33161c; --good: #4fd08d; --bad: #ff7b72; --warn: #f0b34a; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
.wrap { max-width: 880px; margin: 0 auto; padding: 0 16px; }
.top { background: var(--panel); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 5; }
.top-in { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; padding-top: 10px; padding-bottom: 10px; }
.brand { font-weight: 800; color: var(--accent); text-decoration: none; letter-spacing: .02em; }
.brand span { color: var(--ink); font-weight: 600; }
nav { display: flex; gap: 4px; flex-wrap: wrap; }
nav button { border: 0; background: none; color: var(--muted); font: inherit; font-weight: 600; padding: 6px 12px; border-radius: 999px; cursor: pointer; }
nav button.on { background: var(--soft); color: var(--accent); }
.tab { display: none; padding: 24px 0 40px; }
.tab.on { display: block; }
h1 { font-size: clamp(1.5rem, 4vw, 2.1rem); line-height: 1.2; margin: 0 0 12px; }
h2 { margin: 32px 0 12px; font-size: 1.2rem; }
h3 { margin: 0 0 8px; font-size: 1.05rem; }
.lead { color: var(--muted); font-size: 1.08rem; max-width: 62ch; }
.note, .muted { color: var(--muted); font-size: .93rem; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; margin-top: 20px; }
.card, .panel { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 18px; }
.card { text-decoration: none; color: inherit; transition: border-color .15s, transform .15s; }
.card:hover { border-color: var(--accent); transform: translateY(-2px); }
.card p { margin: 0; color: var(--muted); font-size: .95rem; }
.panel { margin-top: 14px; }
.row { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 12px; }
.controls { margin-top: 0; }
label { font-size: .9rem; color: var(--muted); display: inline-flex; align-items: center; gap: 6px; }
select, textarea, input[type=text] { font: inherit; color: var(--ink); background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 7px 10px; }
textarea { width: 100%; margin-top: 12px; resize: vertical; }
input[type=text] { width: 11em; max-width: 100%; }
input.ok { border-color: var(--good); } input.no { border-color: var(--bad); }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.seg button { border: 0; background: var(--panel); color: var(--muted); font: inherit; font-weight: 600; padding: 7px 14px; cursor: pointer; }
.seg button.on { background: var(--accent); color: var(--accent-ink); }
.btn { font: inherit; font-weight: 600; border-radius: 10px; padding: 9px 16px; cursor: pointer; border: 1px solid var(--line); background: var(--panel); color: var(--ink); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.rec { animation: pulse 1.2s infinite; }
.btn:disabled { opacity: .5; cursor: not-allowed; }
@keyframes pulse { 50% { box-shadow: 0 0 0 6px color-mix(in srgb, var(--accent) 25%, transparent); } }
.q-meta { text-transform: uppercase; letter-spacing: .08em; font-size: .75rem; font-weight: 700; color: var(--accent); }
.question { font-size: 1.3rem; font-weight: 600; margin: 6px 0; }
.cue { margin: 6px 0 0; padding-left: 20px; color: var(--muted); }
.timer { font-variant-numeric: tabular-nums; font-weight: 700; font-size: 1.15rem; margin-left: auto; }
.live { color: var(--muted); font-size: .92rem; min-height: 1.4em; margin-top: 8px; }
.transcript { min-height: 90px; background: var(--bg); border-radius: 10px; padding: 12px; white-space: pre-wrap; }
.transcript .interim { color: var(--muted); }
audio { width: 100%; margin-top: 12px; }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 10px; margin-top: 12px; }
.stat { background: var(--bg); border-radius: 10px; padding: 10px 12px; }
.stat b { display: block; font-size: 1.35rem; font-variant-numeric: tabular-nums; }
.stat span { color: var(--muted); font-size: .82rem; }
.feedback { padding-left: 20px; margin: 12px 0 0; }
.feedback li { margin: 4px 0; }
.feedback .good::marker { color: var(--good); } .feedback .warn::marker { color: var(--warn); }
.bar { height: 6px; background: var(--bg); border-radius: 3px; margin-top: 14px; overflow: hidden; }
.bar i { display: block; height: 100%; width: 0; background: var(--accent); transition: width .3s; }
.meter-row { display: flex; align-items: center; gap: 10px; margin-top: 6px; }
.meter-row { flex-wrap: wrap; }
.meter-row select { max-width: 100%; }
.meter-row .bar { flex: 1; min-width: 120px; margin-top: 0; height: 10px; }
.meter-row .bar i { background: var(--good); transition: width .1s; }
#ls-questions {padding-left: 22px; margin: 0; }
#ls-questions li { margin: 12px 0; }
#ls-questions .opts { display: grid; gap: 4px; margin-top: 6px; }
#ls-questions .opts label { color: var(--ink); font-size: 1rem; }
.ans { font-size: .9rem; margin-left: 6px; }
.ans.ok, .tok.ok { color: var(--good); } .ans.no, .tok.no { color: var(--bad); }
#ls-script p { margin: 6px 0; } #ls-script b { color: var(--accent); }
.diff { margin-top: 12px; line-height: 2; }
.tok { padding: 2px 5px; border-radius: 5px; background: var(--bg); margin-right: 3px; }
.tok.no { text-decoration: underline wavy; font-weight: 600; }
.foot { color: var(--muted); font-size: .8rem; padding-top: 16px; padding-bottom: 32px; border-top: 1px solid var(--line); }
.back { display: inline-block; color: var(--muted); text-decoration: none; font-weight: 600; font-size: .92rem; margin-bottom: 10px; }
.lesson-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 12px; }
.lesson-head h1 { margin: 2px 0 0; }
#lessons .card .bar { margin: 12px 0 6px; }
#lessons .card .note { margin: 0; }
.prompt { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.btn.small { padding: 4px 9px; }
#ln-text { font-size: clamp(1.25rem, 3.6vw, 1.6rem); line-height: 1.6; margin: 4px 0 8px; }
#ln-text .tok { background: none; padding: 0; margin-right: .28em; display: inline-block; }
.steps { display: flex; flex-wrap: wrap; gap: 10px 22px; margin-top: 16px; }
.step { display: flex; align-items: center; gap: 8px; }
.num { width: 24px; height: 24px; border-radius: 50%; background: var(--soft); color: var(--accent); font-weight: 700; font-size: .82rem; display: grid; place-items: center; }
#ln-mine { margin-top: 10px; }
#ln-mine audio { margin-top: 4px; }