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h2#practice{margin-top:2.5em}.quiz{font-family:var(--sans);font-size:16px}.quiz-intro{color:var(--ink-2)}.segmented{background:var(--surface-2);border-radius:12px;grid-template-columns:repeat(4,1fr);gap:4px;margin-bottom:12px;padding:4px;display:grid}.segmented button{cursor:pointer;color:var(--ink-2);background:0 0;border:0;border-radius:9px;padding:9px 4px;font-size:14px;font-weight:600}.segmented button.on{background:var(--surface);color:var(--ink);box-shadow:0 1px 3px #0000001f}.quiz-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:10px 8px 4px}.q-staff{color:#1d2230;width:100%;max-width:420px;height:auto;margin:0 auto;display:block}.q-staff-line{stroke:currentColor;stroke-width:1px}.q-staff .q-clef{stroke:currentColor;fill:currentColor}.q-staff path.q-clef,.q-staff .q-clef path{fill:none}.q-notehead{fill:currentColor;transition:fill .15s}.q-staff.right .q-notehead{fill:#2f7a4f}.q-staff.wrong .q-notehead{fill:#b23a3a}.quiz-feedback{text-align:center;color:#4a5163;min-height:1.5em;margin:0 0 8px}.letters{grid-template-columns:repeat(7,1fr);gap:6px;margin-top:12px;display:grid}.letters button{border:1px solid var(--line);background:var(--surface);min-height:52px;font-size:19px;font-weight:700;font-family:var(--serif);cursor:pointer;color:var(--ink);border-radius:12px}.letters button:hover:not(:disabled){border-color:var(--brand)}.letters button:active:not(:disabled){transform:scale(.96)}.letters button:disabled{opacity:.35;cursor:default}.letters button.right{background:var(--good-soft);border-color:var(--good);color:var(--good);opacity:1}.letters button.wrong{background:var(--bad-soft);border-color:var(--bad);color:var(--bad);opacity:1}.quiz-foot{flex-wrap:wrap;align-items:center;gap:8px;min-height:36px;margin-top:12px;display:flex}.quiz-score{color:var(--ink-3);font-variant-numeric:tabular-nums;margin-right:auto;font-size:14px}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}.offline-card{border-radius:var(--radius);background:var(--surface);border:1px solid var(--line);margin-top:28px;padding:18px}.offline-card h2{font-size:1.05rem;font-family:var(--sans);margin:0 0 6px}.offline-card p{color:var(--ink-2);margin:0 0 14px;font-size:15px;line-height:1.5}.offline-card .meter{margin:0}.offline-ok{align-items:center;gap:8px;font-weight:600;display:flex;color:var(--good)!important;margin:0!important}.offline-note{font-family:var(--sans);color:var(--ink-3);margin-top:4px;font-size:13px;display:block}.embed-preview{background:#fff;border-radius:10px;width:100%;margin-top:2px;display:block}.offline-banner{left:50%;bottom:max(16px, env(safe-area-inset-bottom));z-index:35;background:var(--ink);color:var(--bg);box-shadow:var(--shadow);white-space:nowrap;border-radius:99px;padding:8px 14px;font-size:14px;font-weight:600;position:fixed;transform:translate(-50%)}.install{border-top:1px solid var(--line);margin-top:16px;padding-top:14px}.install p{margin-bottom:10px}.score-card{border-radius:var(--radius);background:var(--surface);border:1px solid var(--line);font-family:var(--sans);margin:1.4em 0;padding:12px 12px 10px}.loading-score{min-height:120px}.score-parts{gap:4px 16px;display:grid}@media (width>=560px){.score-parts.multi{grid-template-columns:1fr 1fr}}.score-part{text-align:left!important;margin:0!important}.score-part figcaption{letter-spacing:.06em;text-transform:uppercase;color:var(--ink-3);margin:-2px 0 6px 6px;font-size:12px;font-weight:650}.score-svg{overflow-x:auto}.score-svg svg{width:100%;height:auto;color:var(--ink);fill:currentColor;display:block}.score-svg g.note{cursor:pointer;transition:color 80ms}.score-svg g.note.sounding,.score-svg g.note.sounding *{color:var(--accent);fill:var(--accent)}.score-bar{border-top:1px solid var(--line);flex-wrap:wrap;align-items:center;gap:8px 12px;margin-top:8px;padding-top:10px;display:flex}.score-hint{color:var(--ink-3);flex:1;font-size:13px}.score-original{color:var(--ink-3);align-items:center;gap:4px;font-size:13px;text-decoration:none;display:inline-flex}.stop-square{background:currentColor;border-radius:2px;width:10px;height:10px;display:inline-block}