:root{--bg: #0b1722;--bg-2: #0f2233;--panel: rgba(13, 31, 48, .82);--panel-solid: #102536;--line: rgba(120, 190, 255, .18);--accent: #38bdf8;--accent-2: #22d3ee;--text: #eaf4ff;--muted: #8fb4d4;--shadow: 0 10px 30px rgba(0, 0, 0, .45);font-family:PingFang SC,Microsoft YaHei,Noto Sans SC,system-ui,sans-serif}*{box-sizing:border-box}html,body{margin:0;height:100%;background:radial-gradient(1200px 700px at 50% -10%,var(--bg-2),var(--bg));color:var(--text);overflow:hidden}#app{display:flex;flex-direction:column;height:100vh}#topbar{display:flex;align-items:center;gap:24px;padding:12px 20px;border-bottom:1px solid var(--line);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);flex-shrink:0}.brand{font-size:18px;font-weight:700;letter-spacing:.5px}#stroke-tabs{display:flex;gap:8px}.tab{padding:8px 18px;border-radius:999px;border:1px solid var(--line);background:transparent;color:var(--muted);font-size:15px;cursor:pointer;transition:all .18s ease}.tab:hover{color:var(--text);border-color:var(--accent)}.tab.active{color:#04121d;background:linear-gradient(120deg,var(--accent),var(--accent-2));border-color:transparent;font-weight:700}.tab.soon{opacity:.55}.tab .soon-badge{font-size:11px;margin-left:6px;opacity:.8}#stage{position:relative;flex:1 1 auto;min-height:0}#viewport{position:absolute;top:0;right:0;bottom:0;left:0}#viewport canvas{display:block}#camera-presets{position:absolute;top:16px;right:16px;display:grid;grid-template-columns:repeat(2,1fr);gap:6px;padding:10px;background:var(--panel);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow)}#camera-presets .preset-title{grid-column:1 / -1;font-size:12px;color:var(--muted);text-align:center;margin-bottom:2px}.cam-btn{padding:7px 10px;min-width:64px;border-radius:9px;border:1px solid var(--line);background:#ffffff08;color:var(--text);font-size:13px;cursor:pointer;transition:all .15s ease}.cam-btn:hover{border-color:var(--accent);background:#38bdf81f}#annotation-overlay{position:absolute;left:16px;bottom:16px;width:min(340px,42vw);pointer-events:none}.note-card{background:var(--panel);border:1px solid var(--line);border-left:4px solid var(--accent);border-radius:14px;padding:14px 16px;box-shadow:var(--shadow);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.note-phase{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--accent-2);font-weight:700;margin-bottom:6px}.note-phase .dot{width:8px;height:8px;border-radius:50%;background:var(--accent-2);box-shadow:0 0 10px var(--accent-2)}.note-part{font-size:12px;color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:1px 8px}.note-text{font-size:16px;line-height:1.5}.breath-legend{display:flex;flex-wrap:wrap;gap:12px;margin-top:10px;font-size:12px;color:var(--muted)}.breath-legend .sw{display:inline-block;width:11px;height:11px;border-radius:50%;margin-right:5px;vertical-align:-1px;box-shadow:0 0 6px currentColor}.rhythm{margin-top:10px;display:flex;gap:4px;font-size:12px;color:var(--muted);flex-wrap:wrap}.rhythm span{opacity:.5}.rhythm span.on{opacity:1;color:var(--accent-2);font-weight:700}#controls{display:flex;align-items:center;gap:18px;padding:12px 20px;border-top:1px solid var(--line);background:var(--panel-solid);flex-shrink:0;min-height:72px}.ctrl-btn{height:44px;border-radius:12px;border:1px solid var(--line);background:#ffffff0a;color:var(--text);font-size:16px;cursor:pointer;transition:all .15s ease}.ctrl-btn:hover{border-color:var(--accent);background:#38bdf81f}.play-btn{min-width:96px;padding:0 16px;font-weight:700;white-space:nowrap}.play-btn.paused{color:#04121d;background:linear-gradient(120deg,#ffd76a,#ffb13d);border-color:transparent}.speed-group{display:flex;gap:6px;align-items:center}.speed-group .label{font-size:13px;color:var(--muted);margin-right:2px}.speed-btn{padding:6px 12px;border-radius:9px;border:1px solid var(--line);background:transparent;color:var(--muted);font-size:13px;cursor:pointer}.speed-btn.active{color:#04121d;background:var(--accent);border-color:transparent;font-weight:700}.scrubber-wrap{flex:1;display:flex;flex-direction:column;gap:4px}.scrubber-phases{position:relative;height:22px;display:flex;border-radius:8px;overflow:hidden;border:1px solid var(--line);cursor:pointer}.scrubber-phase{flex:1;display:flex;align-items:center;justify-content:center;font-size:12px;color:var(--muted);border-right:1px solid var(--line);transition:background .15s ease,color .15s ease}.scrubber-phase:last-child{border-right:none}.scrubber-phase.on{background:#38bdf838;color:var(--text);font-weight:700}.scrubber-track{position:relative;height:6px;border-radius:999px;background:#ffffff14}.scrubber-fill{position:absolute;left:0;top:0;bottom:0;border-radius:999px;background:linear-gradient(90deg,var(--accent),var(--accent-2))}.hint{position:absolute;top:16px;left:16px;font-size:12px;color:var(--muted);background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:8px 12px;max-width:220px;line-height:1.5;pointer-events:none}