:root{--bg: #f7f7f9;--panel: #ffffff;--border: #d9d9e3;--text: #1f2328;--muted: #6b7280;--accent: #1565c0;--hit: #2e7d32;--wrong: #c62828}*{box-sizing:border-box}html,body{margin:0;height:100%;background:var(--bg);color:var(--text);font-family:Segoe UI,Microsoft YaHei,system-ui,sans-serif}#app{display:flex;flex-direction:column;height:100vh}.app-header{display:flex;align-items:center;gap:16px;flex-wrap:wrap;padding:8px 14px;background:var(--panel);border-bottom:1px solid var(--border)}#control-panel{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.control{display:flex;align-items:center;gap:4px;font-size:13px;color:var(--muted)}.control select,.control button,.control input[type=number]{font:inherit;font-size:13px;padding:3px 6px;border:1px solid var(--border);border-radius:6px;background:#fff;color:var(--text)}.control button{cursor:pointer}.control button:hover:not(:disabled){border-color:var(--accent);color:var(--accent)}.control button:disabled,.control select:disabled{opacity:.5;cursor:not-allowed}.feedback-bar{min-height:52px;display:flex;align-items:center;gap:14px;padding:6px 14px;background:var(--panel);border-top:1px solid var(--border);font-size:14px}.feedback-bar .fb-messages{flex:1;min-width:0;display:flex;align-items:center;gap:14px}.feedback-bar .expected{font-weight:600;color:var(--accent);font-size:28px}.feedback-bar .wrong{color:var(--wrong);font-weight:600;animation:flash .3s}.feedback-bar .stuck{color:#b26a00;font-weight:600}.feedback-bar .session-controls{display:flex;gap:10px;flex-shrink:0}.feedback-bar .session-btn{font-size:16px;font-weight:600;padding:8px 22px;border:1px solid var(--border);border-radius:6px;background:#fff;color:var(--text);cursor:pointer}.feedback-bar .session-btn:hover:not(:disabled){border-color:var(--accent);color:var(--accent)}.feedback-bar .session-btn:disabled{opacity:.5;cursor:not-allowed}.feedback-bar .info{color:var(--accent);font-weight:600}@keyframes flash{0%{opacity:.2}to{opacity:1}}.score-container{flex:1;overflow:auto;scrollbar-gutter:stable;padding:12px;background:#fff}.score-canvas{width:100%}.score-canvas img[id^=cursorImg]{pointer-events:none}.score-container.drag-over{outline:2px dashed var(--accent);outline-offset:-6px;background:#eef4fc}.keyboard-hint{padding:6px 10px 10px;background:var(--panel);border-top:1px solid var(--border);user-select:none}.keyboard-hint .keys{position:relative;height:60px}.keyboard-hint .key{position:absolute;top:0;height:100%;box-sizing:border-box;border:1px solid var(--border);border-radius:0 0 3px 3px;background:#fff;cursor:pointer;z-index:1}.keyboard-hint .key.black{height:62%;background:#22252b;border-color:#22252b;border-radius:0 0 2px 2px;box-shadow:0 2px 2px #0006;z-index:2}.keyboard-hint .key.current{background:var(--accent);border-color:var(--accent)}.keyboard-hint .key.wrong{background:var(--wrong);border-color:var(--wrong)}.keyboard-hint .key.pressed{box-shadow:inset 0 3px 8px #00000059}.keyboard-hint .key.pressed.idle{background:#f9a825;border-color:#c9820a}.keyboard-hint .key.pressed.correct{background:var(--hit);border-color:var(--hit)}.keyboard-hint .key.pressed.wrong{background:var(--wrong);border-color:var(--wrong)}.keyboard-hint .key.c{border-bottom:3px solid var(--accent)}.keyboard-hint .label{font-size:12px;color:var(--muted);margin-bottom:4px}.app-footer{display:flex;justify-content:space-between;gap:12px;padding:4px 14px;background:var(--panel);border-top:1px solid var(--border);font-size:12px;color:var(--muted)}.app-footer span{margin-right:12px}.note-legend{display:flex;align-items:center;gap:12px;white-space:nowrap}.legend-item{display:inline-flex;align-items:center;gap:4px;margin-right:0}.legend-item i{display:inline-block;width:10px;height:10px;border-radius:2px}.tb-overlay{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;background:#0f172a73;z-index:1000}.tb-overlay[hidden]{display:none}.tb-countdown-circle{width:180px;height:180px;border-radius:50%;background:var(--panel);border:4px solid var(--accent);display:flex;align-items:center;justify-content:center;box-shadow:0 12px 40px #1565c040}.tb-countdown-circle.pop{animation:tb-pop 1s ease-out}.tb-countdown-num{font-size:84px;font-weight:700;color:var(--accent)}@keyframes tb-pop{0%{transform:scale(.6);opacity:.2}20%{transform:scale(1.05);opacity:1}to{transform:scale(1)}}.tb-score-card{background:var(--panel);border-radius:14px;padding:28px 36px;min-width:320px;text-align:center;box-shadow:0 16px 48px #00000040}.tb-score-card h2{margin:0 0 12px;font-size:18px}.tb-score-value{font-size:64px;font-weight:800;line-height:1.1}.tb-score-value.excellent{color:var(--hit)}.tb-score-value.ok{color:var(--accent)}.tb-score-value.poor{color:var(--wrong)}.tb-score-detail{color:var(--muted);font-size:13px;margin:10px 0 18px}.tb-score-card button{font:inherit;padding:8px 28px;border:none;border-radius:8px;background:var(--accent);color:#fff;cursor:pointer}.tb-score-card button:hover{opacity:.9}.tb-score-breakdown{list-style:none;margin:0 0 18px;padding:0;font-size:14px;color:var(--text)}.tb-score-breakdown li{display:flex;justify-content:space-between;gap:24px;padding:3px 0;border-bottom:1px dashed var(--border)}.tb-score-breakdown li.penalty{color:var(--wrong)}.score-options{display:flex;gap:12px}.score-opt{display:inline-flex;align-items:center;gap:4px;font-size:13px;white-space:nowrap;cursor:pointer}