:root {
  --bg:#f3f4f6;
  --card:#fff;
  --text:#111827;
  --muted:#6b7280;
  --line:#d1d5db;
  --accent:#111827;
  --accentText:#fff;
  --good:#166534;
  --goodBg:#dcfce7;
  --bad:#991b1b;
  --badBg:#fee2e2;
  --warn:#92400e;
  --warnBg:#fef3c7;
  --shadow:0 12px 35px rgba(0,0,0,.08);
}
body.dark {
  --bg:#080b12;
  --card:#111827;
  --text:#f9fafb;
  --muted:#9ca3af;
  --line:#374151;
  --accent:#f9fafb;
  --accentText:#111827;
  --good:#bbf7d0;
  --goodBg:#14532d;
  --bad:#fecaca;
  --badBg:#7f1d1d;
  --warn:#fde68a;
  --warnBg:#78350f;
  --shadow:0 12px 35px rgba(0,0,0,.28);
}
*{box-sizing:border-box}
body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--text)}
button,.file-label,select{border:1px solid var(--line);background:var(--card);color:var(--text);padding:.78rem 1rem;border-radius:12px;font-weight:700}
button,.file-label{cursor:pointer}
button:hover,.file-label:hover{transform:translateY(-1px)}
button:disabled{opacity:.45;cursor:not-allowed;transform:none}
button.primary{background:var(--accent);color:var(--accentText);border-color:var(--accent)}
button.ghost{background:transparent}
button.small{width:44px;height:44px;padding:0}
button.danger{color:var(--bad)}
.app-shell{max-width:980px;margin:0 auto;padding:24px 16px 56px}
.hero{display:flex;justify-content:space-between;align-items:start;gap:20px;padding:16px 2px 22px}
.eyebrow,.section-label{font-size:.78rem;letter-spacing:.13em;font-weight:800;color:var(--muted);margin:0 0 6px}
h1{margin:0;font-size:clamp(2rem,5vw,3.6rem);letter-spacing:-.045em}
h2{margin:0 0 8px}
.subtitle,.fineprint{color:var(--muted)}
.mode-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:18px}
.mode-card{text-align:left;padding:18px;display:grid;grid-template-columns:auto 1fr;column-gap:12px;row-gap:3px;align-items:center}
.mode-card.active{outline:3px solid var(--text)}
.mode-card .mode-number{grid-row:1/3;font-size:1.4rem;font-weight:900}
.mode-card small{color:var(--muted)}
.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:22px;margin-bottom:18px;box-shadow:var(--shadow)}
.progress-row{display:flex;justify-content:space-between;color:var(--muted);font-size:.92rem}
.progress-track{height:10px;border-radius:999px;background:var(--bg);margin-top:12px;overflow:hidden}
.progress-bar{height:100%;background:var(--accent);transition:width .25s ease}
.word-card{text-align:center}
.instruction{line-height:1.55;color:var(--muted)}
.word{font-size:clamp(3.2rem,12vw,7rem);font-weight:900;letter-spacing:-.055em;line-height:1;margin:24px 0 8px}
.ipa{font-size:1.3rem;color:var(--muted);margin-bottom:12px}
.hidden{display:none!important}
.action-row,.nav-row,.tool-row{display:flex;flex-wrap:wrap;justify-content:center;gap:9px;margin-top:18px}
.status{margin:22px auto 0;max-width:720px;padding:18px;border-radius:14px;border:1px solid var(--line);font-weight:800}
.status.neutral{background:var(--bg)}
.status.good{color:var(--good);background:var(--goodBg);border-color:transparent}
.status.bad{color:var(--bad);background:var(--badBg);border-color:transparent}
.status.warn{color:var(--warn);background:var(--warnBg);border-color:transparent}
.heard{margin-top:6px;font-weight:500}
.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:16px}
.stat{border:1px solid var(--line);border-radius:14px;padding:16px;text-align:center}
.stat span{display:block;font-size:2rem;font-weight:900}
.stat small{display:block;color:var(--muted);margin-top:5px;font-weight:800}
.block-settings{display:flex;justify-content:space-between;align-items:center;gap:12px;margin:18px 0}
.block-settings label{display:flex;align-items:center;gap:8px;color:var(--muted);font-weight:700}
.word-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:8px}
.word-chip{border:1px solid var(--line);border-radius:10px;padding:10px;text-align:center;font-weight:800;background:var(--bg)}
.word-chip .rank{display:block;font-size:.7rem;color:var(--muted);font-weight:500}
.result-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-top:18px}
.result-item{border:1px solid var(--line);border-radius:10px;padding:10px}
.result-item.good{background:var(--goodBg);color:var(--good);border-color:transparent}
.result-item.bad{background:var(--badBg);color:var(--bad);border-color:transparent}
.result-item small{display:block;margin-top:4px;opacity:.85}
.review-box{margin-top:22px;padding:18px;border:1px dashed var(--line);border-radius:14px}
.review-list{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.review-word{display:flex;align-items:center;gap:8px;border:1px solid var(--line);border-radius:999px;padding:8px 10px}
.review-word button{padding:5px 8px;border-radius:999px}
.summary-head{display:flex;justify-content:space-between;align-items:center}
.file-label input{display:none}
.tool-row{justify-content:flex-start}
footer{text-align:center;color:var(--muted);padding:8px 12px}
.recording{animation:pulse 1.2s infinite}
@keyframes pulse{50%{opacity:.55}}
@media(max-width:760px){
  .mode-grid{grid-template-columns:1fr}
  .word-grid{grid-template-columns:repeat(3,1fr)}
  .result-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:1fr}
  .action-row button,.nav-row button{flex:1 1 42%}
}