:root{--bg: #141b24;--surface: #1c2632;--surface-2: #233040;--border: #2b3a4b;--text: #e6edf3;--muted: #8a9bb0;--blue: #2d6cff;--blue-soft: rgba(45, 108, 255, .15);--green: #2ebd85;--green-soft: rgba(46, 189, 133, .12);--red: #f0544f;--red-soft: rgba(240, 84, 79, .12);--yellow: #f2b544;--radius: 12px;--jp: "Noto Sans JP", system-ui, sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,system-ui,sans-serif;font-size:15px;-webkit-font-smoothing:antialiased}#app{max-width:1100px;margin:0 auto;padding:32px 16px 64px}h1{margin:0 0 6px;font-size:26px;font-weight:700;display:flex;align-items:center;gap:10px}h2{font-size:16px;margin:28px 0 12px;text-align:left}.logo{font-family:var(--jp);background:var(--blue);border-radius:8px;width:36px;height:36px;display:grid;place-items:center;font-size:20px}.muted{color:var(--muted)}.good{color:var(--green)}.bad{color:var(--red)}.mid{color:var(--yellow)}.top{margin-bottom:24px}.top p{margin:0}.row{display:flex;gap:8px;flex-wrap:wrap}.row.center{justify-content:center;margin-top:28px}.btn{border:1px solid transparent;border-radius:8px;padding:10px 18px;font:inherit;font-weight:600;color:var(--text);cursor:pointer;transition:background .15s,border-color .15s,opacity .15s}.btn.sm{padding:6px 12px;font-size:13px}.btn.primary{background:var(--blue)}.btn.primary:hover{background:#4a80ff}.btn.primary:disabled{opacity:.4;cursor:not-allowed}.btn.ghost{background:var(--surface-2);border-color:var(--border)}.btn.ghost:hover{border-color:var(--muted)}.panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px}.panel-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}.label{font-weight:600}.kanji-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(96px,1fr));gap:10px}.kanji-tile{background:var(--surface-2);border:1px solid var(--border);border-radius:10px;padding:14px 8px 10px;color:var(--muted);cursor:pointer;display:flex;flex-direction:column;align-items:center;gap:4px;font:inherit;transition:all .15s}.kanji-tile .k{font-family:var(--jp);font-size:34px;line-height:1.1}.kanji-tile .n{font-size:12px}.kanji-tile:hover{border-color:var(--muted)}.kanji-tile.on{background:var(--blue-soft);border-color:var(--blue);color:var(--text)}.start-bar{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-top:16px;flex-wrap:wrap}.switch{display:flex;align-items:center;gap:10px;cursor:pointer;color:var(--muted);-webkit-user-select:none;user-select:none}.switch input{display:none}.switch .track{width:36px;height:20px;border-radius:99px;background:var(--surface-2);border:1px solid var(--border);position:relative;transition:background .15s}.switch .track:after{content:"";position:absolute;top:2px;left:2px;width:14px;height:14px;border-radius:50%;background:var(--muted);transition:transform .15s,background .15s}.switch input:checked+.track{background:var(--blue);border-color:var(--blue)}.switch input:checked+.track:after{transform:translate(16px);background:#fff}.quiz-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}.stats{display:flex;gap:16px;font-weight:600;font-variant-numeric:tabular-nums}.bar{height:4px;background:var(--surface-2);border-radius:99px;overflow:hidden}.bar .fill{height:100%;width:0;background:var(--blue);transition:width .25s}.hint{font-size:13px;margin:12px 0 20px}kbd{background:var(--surface-2);border:1px solid var(--border);border-radius:4px;padding:1px 6px;font-size:12px}.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:16px 10px 12px;display:flex;flex-direction:column;align-items:center;gap:10px;transition:border-color .15s,background .15s}.card:focus-within{border-color:var(--blue);box-shadow:0 0 0 3px var(--blue-soft)}.card.right{border-color:var(--green);background:var(--green-soft)}.card.wrong{border-color:var(--red);background:var(--red-soft)}.word{font-family:var(--jp);font-size:30px;color:var(--muted);letter-spacing:1px;text-align:center}.target{color:var(--text);border-bottom:2px solid var(--blue)}.card.right .target{border-color:var(--green)}.card.wrong .target{border-color:var(--red)}.answer{width:100%;background:var(--bg);border:1px solid var(--border);border-radius:8px;color:var(--text);font-family:var(--jp);font-size:18px;text-align:center;padding:8px;outline:none}.answer:focus{border-color:var(--blue)}.answer:disabled{background:transparent;border-color:transparent}.card.right .answer{color:var(--green)}.card.wrong .answer{color:var(--red);text-decoration:line-through}.feedback{text-align:center;font-size:12px;min-height:0}.feedback:empty{display:none}.expected{font-family:var(--jp);color:var(--green);font-size:18px;font-weight:700}.extra{color:var(--muted);margin-top:2px;font-family:var(--jp)}.results{text-align:center;max-width:760px;margin:0 auto;padding:32px 24px}.score-big{font-size:64px;font-weight:700;line-height:1;font-variant-numeric:tabular-nums}.perfect{font-size:18px;margin-top:24px}.mistakes{width:100%;border-collapse:collapse;text-align:left;font-size:14px}.mistakes th{color:var(--muted);font-weight:500;font-size:12px;text-transform:uppercase;letter-spacing:.04em;padding:8px;border-bottom:1px solid var(--border)}.mistakes td{padding:10px 8px;border-bottom:1px solid var(--border);font-family:var(--jp)}.mistakes td.jp{font-size:22px;color:var(--muted)}@media (max-width: 560px){.mistakes th:last-child,.mistakes td:last-child{display:none}}.lesson+.lesson{margin-top:20px}.lesson-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px;color:var(--muted);font-size:13px;font-weight:600;text-transform:uppercase;letter-spacing:.04em}.spacer{flex:1}.clue{font-size:12px;color:var(--yellow);text-align:center;margin-top:-4px}.card{position:relative}.peek{position:absolute;top:6px;right:6px;width:18px;height:18px;border-radius:50%;border:1px solid var(--border);background:transparent;color:var(--muted);font:600 11px/1 Inter,sans-serif;cursor:pointer;opacity:.35;padding:0;transition:opacity .15s,border-color .15s}.peek:hover{opacity:1;border-color:var(--muted)}.card.peeked .peek{opacity:.8;color:var(--yellow);border-color:var(--yellow)}.readings{width:100%;border-top:1px dashed var(--border);padding-top:8px;font-family:var(--jp);font-size:13px;display:flex;flex-direction:column;gap:4px}.readings[hidden]{display:none}.readings .tag{display:inline-block;width:18px;color:var(--muted);font-size:11px}