:root{--bg: #ffffff;--fg: #14181f;--muted: #6b7480;--line: #e4e8ee;--accent: #2563eb;--ok: #2f8a3d;--bad: #c8372d}@media (prefers-color-scheme: dark){:root{--bg: #14181f;--fg: #eef1f5;--muted: #98a1ad;--line: #2a303a}}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.45 -apple-system,Segoe UI,Roboto,sans-serif}.app{padding-bottom:72px}.screen{padding:20px 16px}.screen.empty{color:var(--muted);text-align:center;padding-top:80px}.progress-line{color:var(--muted);font-size:14px;margin-bottom:20px}.badge{margin-left:8px;padding:1px 7px;border-radius:999px;background:var(--accent);color:#fff;font-size:12px}.word{font-size:30px;font-weight:600}.word-line{display:flex;align-items:center;gap:10px}.transcription{color:var(--muted);margin-top:4px}.prompt{margin:22px 0 12px;color:var(--muted)}.sentence{font-size:19px;margin-bottom:6px}.sentence-ru{color:var(--muted)}.example-reveal{margin-top:22px;padding-top:16px;border-top:1px solid var(--line)}.options{display:grid;gap:10px}.option{padding:14px 16px;border:1px solid var(--line);border-radius:12px;background:transparent;color:var(--fg);font-size:16px;text-align:left;cursor:pointer}.option.correct{border-color:var(--ok);color:var(--ok)}.option.wrong{border-color:var(--bad);color:var(--bad)}.answer-input{width:100%;padding:14px 16px;margin:12px 0;border:1px solid var(--line);border-radius:12px;background:transparent;color:var(--fg);font-size:18px}.primary{width:100%;padding:14px;border:0;border-radius:12px;background:var(--accent);color:#fff;font-size:16px;cursor:pointer}.audio-button{width:34px;height:34px;border-radius:50%;border:1px solid var(--line);background:transparent;color:var(--accent);font-size:16px;cursor:pointer}.verdict{margin-top:24px}.verdict.correct{color:var(--ok)}.verdict.wrong,.verdict.typo{color:var(--bad)}.verdict .primary{margin-top:14px}.summary{text-align:center;padding-top:40px}.summary-title{font-size:22px;font-weight:600;margin-bottom:18px}.summary-numbers{display:flex;justify-content:center;gap:22px;margin-bottom:16px}.summary-hardest{color:var(--muted);margin-bottom:22px}.bottom-nav{position:fixed;left:0;right:0;bottom:0;display:flex;border-top:1px solid var(--line);background:var(--bg);padding-bottom:env(safe-area-inset-bottom)}.nav-item{flex:1;padding:14px 4px;border:0;background:transparent;color:var(--muted);font-size:13px;cursor:pointer}.nav-item.active{color:var(--accent)}.settings-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 0;border-bottom:1px solid var(--line)}.settings-row input{width:80px;padding:8px 10px;text-align:right;border:1px solid var(--line);border-radius:8px;background:transparent;color:var(--fg);font-size:16px}h2{font-size:22px;margin:0 0 6px}h3{font-size:16px;margin:28px 0 10px;font-weight:600}.muted{color:var(--muted)}.small{font-size:13px}.error-text{color:var(--bad)}.footer-note{margin-top:28px}.back,.link{border:0;background:transparent;color:var(--accent);font-size:14px;padding:4px 0;cursor:pointer}.back{margin-bottom:10px}.topic-list,.word-list{list-style:none;margin:14px 0 0;padding:0}.topic-card{display:block;width:100%;text-align:left;padding:14px;border:1px solid var(--line);border-radius:12px;margin-bottom:10px;background:transparent;color:var(--fg);cursor:pointer}.topic-title{font-size:17px;font-weight:600;margin-bottom:4px}.word-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 0;border-bottom:1px solid var(--line)}.word-row label{display:flex;align-items:center;gap:10px}.word-row.in-queue{opacity:.55}.headword{font-weight:600}.add-row{display:flex;gap:8px;align-items:center}.add-row .answer-input{margin:12px 0}.add-row .primary{width:auto;padding:14px 18px;white-space:nowrap}.sticky-action{position:fixed;left:16px;right:16px;bottom:78px}.cards{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-top:16px}.card{border:1px solid var(--line);border-radius:12px;padding:14px}.card-value{font-size:24px;font-weight:600}.bars{display:flex;align-items:flex-end;gap:3px;height:110px;padding-top:6px;border-bottom:1px solid var(--line)}.bar-slot{flex:1;height:100%;display:flex;flex-direction:column;justify-content:flex-end;text-align:center}.bar{background:var(--accent);border-radius:3px 3px 0 0;min-height:2px}