:root{--bg-main: #0a0b10;--bg-card: #12141e;--bg-card-sub: #1a1d2b;--border-color: #25293d;--border-light: #373c57;--text-main: #fcfbf7;--text-muted: #9ba1b8;--text-dim: #60667e;--accent-gold: #e5b654;--accent-gold-hover: #f3ca6a;--accent-gold-glow: rgba(229, 182, 84, .45);--accent-lh: #00d4ff;--accent-lh-glow: rgba(0, 212, 255, .55);--accent-rh: #ff8c2b;--accent-rh-glow: rgba(255, 140, 43, .55);--accent-midi: #10b981;--accent-danger: #ef4444;--key-ivory: #f8f5ed;--key-ivory-shadow: #d5cfbf;--key-ebony: #14151e;--key-ebony-stroke: #08090d;--font-sans: "Bricolage Grotesque", system-ui, -apple-system, sans-serif;--font-mono: "JetBrains Mono", monospace}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-main);background-image:radial-gradient(ellipse 80% 50% at 50% -20%,rgba(229,182,84,.06),transparent),radial-gradient(circle at 10% 20%,rgba(0,212,255,.03),transparent 40%),radial-gradient(circle at 90% 80%,rgba(255,140,43,.03),transparent 40%);color:var(--text-main);font-family:var(--font-sans);height:100dvh;display:flex;flex-direction:column;overflow-x:hidden;overflow-y:auto;-webkit-user-select:none;user-select:none}.app-header{background:linear-gradient(180deg,#161824,#10121a);border-bottom:1px solid var(--border-color);padding:8px 18px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;flex-shrink:0;z-index:10;box-shadow:0 4px 20px #00000080;min-height:54px}.header-left{display:flex;align-items:center;gap:16px;flex:1 1 100%;flex-wrap:wrap;min-width:0}.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}.brand-piano-icon{display:flex;align-items:flex-start;height:22px;width:26px;background:#08090d;padding:2px 2px 0;border-radius:4px;border:1px solid var(--border-color);box-shadow:0 2px 8px #0009;position:relative;overflow:hidden}.brand-piano-icon .key-bar{display:inline-block;border-radius:0 0 2px 2px}.brand-piano-icon .key-bar.white{width:5px;height:18px;background:var(--key-ivory);border:.5px solid #25283a}.brand-piano-icon .key-bar.black{width:3.5px;height:11px;background:#14151e;margin-left:-2px;margin-right:-2px;z-index:2;border-radius:0 0 1.5px 1.5px;box-shadow:0 1px 3px #000000e6}.logo-text{font-size:1.45rem;font-weight:800;letter-spacing:-.6px;display:flex;align-items:center;line-height:1}.logo-key{color:var(--text-main);text-shadow:0 1px 2px rgba(0,0,0,.8)}.logo-chords{background:linear-gradient(135deg,var(--accent-gold),var(--accent-rh));-webkit-background-clip:text;-webkit-text-fill-color:transparent;margin-left:2px;filter:drop-shadow(0 2px 8px rgba(229,182,84,.35))}.badge-piano{background:linear-gradient(135deg,#e5b6542e,#ff8c2b38);color:var(--accent-gold);border:1px solid rgba(229,182,84,.45);font-size:.65rem;font-weight:800;padding:3px 8px;border-radius:5px;letter-spacing:.8px;box-shadow:0 0 10px #e5b65426}.song-bar{display:flex;align-items:center;gap:10px;flex:1;flex-wrap:wrap;min-width:min(100%,300px)}.select-wrapper{flex:1 1 200px;min-width:160px}.select-styled,.input-styled{background:var(--bg-card-sub);border:1px solid var(--border-color);color:var(--text-main);font-family:var(--font-sans);font-size:.85rem;padding:6px 12px;border-radius:6px;outline:none;transition:all .2s;width:100%}.select-styled{cursor:pointer;text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.select-styled:focus,.input-styled:focus{border-color:var(--accent-gold);box-shadow:0 0 10px var(--accent-gold-glow)}.yt-input-pill{display:flex;align-items:center;background:var(--bg-card-sub);border:1px solid var(--border-color);border-radius:6px;padding:2px;width:200px;flex-shrink:0;transition:all .2s ease}.yt-input-pill:focus-within{border-color:var(--accent-gold);box-shadow:0 0 10px var(--accent-gold-glow);width:240px}.yt-input-pill input{background:transparent;border:none;color:var(--text-main);font-size:.8rem;padding:4px 8px;width:100%;min-width:0;outline:none}.btn-pill{padding:4px 10px;font-size:.75rem;font-weight:700;border-radius:4px;flex-shrink:0}.view-mode-toggle{display:flex;align-items:center;background:var(--bg-card-sub);border:1px solid var(--border-color);border-radius:8px;padding:2px;gap:2px;flex-shrink:0}.btn-mode-pill{background:transparent;border:none;color:var(--text-muted);font-family:var(--font-sans);font-size:.78rem;font-weight:700;padding:5px 12px;border-radius:6px;cursor:pointer;transition:all .2s ease;display:inline-flex;align-items:center;gap:5px}.btn-mode-pill:hover{color:var(--text-main)}.btn-mode-pill.is-active{background:linear-gradient(135deg,var(--accent-gold),#cb9528);color:#08090e;box-shadow:0 0 10px var(--accent-gold-glow)}.btn-practice-btn.is-active{background:#2ed57333!important;color:#2ed573!important;border-color:#2ed57380!important;box-shadow:0 0 10px #2ed57333}.header-center{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.btn-play{background:linear-gradient(135deg,var(--accent-gold),#cb9528);color:#08090e;font-weight:800;font-size:.88rem;padding:7px 18px;border-radius:6px;box-shadow:0 2px 12px #e5b65459;display:inline-flex;align-items:center;gap:7px;border:none;cursor:pointer;transition:all .15s ease}.btn-play:hover{background:linear-gradient(135deg,var(--accent-gold-hover),#dc9e2b);transform:translateY(-1px);box-shadow:0 4px 18px var(--accent-gold-glow)}.param-group{display:flex;flex-wrap:wrap;align-items:center;gap:8px}.param-box{display:flex;align-items:center;gap:6px;background:var(--bg-card-sub);padding:3px 8px;border-radius:6px;border:1px solid var(--border-color)}.lbl-small{font-size:.72rem;color:var(--text-muted);text-transform:uppercase;font-weight:600}.transpose-buttons{display:flex;align-items:center;gap:4px}.btn-step{background:var(--bg-card);border:1px solid var(--border-color);color:var(--text-main);width:22px;height:22px;border-radius:4px;cursor:pointer;font-size:.9rem;font-weight:700;display:flex;align-items:center;justify-content:center;transition:all .15s}.btn-step:hover{background:var(--border-color);color:var(--accent-gold)}.trans-val{font-family:var(--font-mono);font-size:.8rem;min-width:48px;text-align:center;color:var(--accent-gold);font-weight:600}.lh-box .lbl-small{color:var(--accent-lh)}.select-compact{padding:2px 4px;font-size:.78rem;font-family:var(--font-mono);background:var(--bg-card);cursor:pointer;border-radius:4px;border:1px solid var(--border-color);color:var(--text-main)}.header-right{display:flex;align-items:center;gap:8px;flex:1 1 auto;flex-wrap:wrap}.btn{font-family:var(--font-sans);font-size:.82rem;font-weight:600;padding:6px 12px;border-radius:6px;cursor:pointer;border:none;display:inline-flex;white-space:nowrap;align-items:center;gap:5px;transition:all .15s ease}.btn-secondary,.btn-ghost{background:var(--bg-card-sub);color:var(--text-main);border:1px solid var(--border-color)}.btn-secondary:hover,.btn-ghost:hover{background:var(--border-color)}.app-main{flex:1;display:grid;grid-template-columns:minmax(260px,380px) minmax(0,1fr);gap:14px;padding:10px 16px;overflow:hidden;min-height:260px}.left-panel{display:flex;flex-direction:column;gap:10px;min-height:0;overflow-y:auto}.video-container{background:#000;border-radius:10px;border:1px solid var(--border-color);aspect-ratio:16 / 9;overflow:hidden;position:relative;box-shadow:0 4px 14px #00000080;flex-shrink:1;min-height:120px}.video-container iframe{width:100%;height:100%;border:none}.video-error-overlay{position:absolute;top:0;right:0;bottom:0;left:0;background:#121110f2;display:flex;flex-direction:column;align-items:center;justify-content:safe center;overflow-y:auto;padding:12px;text-align:center;z-index:10;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px)}.video-error-overlay>*{flex-shrink:0}.video-error-overlay h4{font-size:1rem;color:var(--accent-gold);margin-bottom:8px}.video-error-overlay p{font-size:.82rem;color:var(--text-muted);max-width:380px;margin-bottom:14px;line-height:1.4}.video-error-actions{display:flex;gap:8px;flex-wrap:wrap;justify-content:center}.video-spin{width:28px;height:28px;border:3px solid rgba(255,179,71,.2);border-top-color:var(--accent-gold);border-radius:50%;animation:spin .8s linear infinite;margin-bottom:12px}@keyframes spin{to{transform:rotate(360deg)}}.hud-outer{flex-shrink:0;background:var(--bg-card);border:1px solid var(--border-color);border-radius:10px;padding:10px 12px;box-shadow:0 4px 16px #0000004d}.anticipation-hud{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:10px}.hud-card{background:var(--bg-card-sub);border:1px solid var(--border-color);border-radius:8px;padding:8px 10px;text-align:center;transition:all .2s}.hud-now{border-color:#e5b65473;box-shadow:0 0 16px #e5b6541f;background:linear-gradient(145deg,#181b29,#131520)}.hud-next{background:linear-gradient(145deg,#151824,#10121a)}.hud-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:4px}.hud-badge{font-size:.65rem;font-weight:800;letter-spacing:.8px;padding:2px 7px;border-radius:4px}.now-badge{background:linear-gradient(135deg,var(--accent-gold),#cb9528);color:#08090e;box-shadow:0 1px 6px #e5b6544d}.next-badge{background:var(--border-color);color:var(--text-muted)}.hud-sound-btn{background:transparent;border:none;color:var(--text-muted);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:color .15s}.hud-sound-btn:hover{color:var(--accent-gold)}.hud-chord-name{font-size:1.85rem;font-weight:800;color:var(--text-main);font-family:var(--font-mono);letter-spacing:-.5px;margin:2px 0 4px}.pop-anim{animation:popKey .3s cubic-bezier(.175,.885,.32,1.275)}@keyframes popKey{0%{transform:scale(.85);opacity:.7}to{transform:scale(1);opacity:1}}.chord-success-pulse{animation:successPulse .5s ease;color:var(--accent-midi)!important}@keyframes successPulse{0%{transform:scale(1)}50%{transform:scale(1.12)}to{transform:scale(1)}}.hud-voicing-preview{font-family:var(--font-mono);font-size:.72rem;display:flex;flex-direction:column;gap:2px}.lh-tag{color:var(--accent-lh)}.rh-tag{color:var(--accent-rh)}.next-hint{color:var(--text-dim)}.hud-transition{display:flex;flex-direction:column;align-items:center;gap:4px;min-width:76px}.countdown-label{font-size:.76rem;font-family:var(--font-mono);font-weight:700;color:var(--accent-gold)}.countdown-track{width:100%;height:5px;background:var(--bg-card-sub);border-radius:3px;overflow:hidden;border:1px solid var(--border-color)}.countdown-fill{height:100%;width:0%;background:linear-gradient(90deg,var(--accent-lh),var(--accent-gold));border-radius:3px;transition:width .08s linear}.transition-arrow{color:var(--text-dim);font-size:1rem}.right-panel{background:var(--bg-card);border:1px solid var(--border-color);border-radius:10px;display:flex;flex-direction:column;min-height:0;box-shadow:0 4px 16px #0000004d;overflow:hidden}.panel-header{padding:10px 18px;border-bottom:1px solid var(--border-color);display:flex;flex-wrap:wrap;gap:8px 12px;align-items:center;justify-content:space-between;background:#0000001f}.panel-title-wrap{display:inline-flex;flex-wrap:wrap;align-items:center;gap:8px}.concert-dot,.panel-indicator{width:8px;height:8px;border-radius:50%;background:var(--accent-gold);box-shadow:0 0 8px var(--accent-gold-glow);display:inline-block}.panel-title{font-size:.9rem;font-weight:700;color:var(--text-main);letter-spacing:.2px}.badge-sync-audio{font-size:.65rem;font-weight:700;padding:2px 7px;border-radius:4px;letter-spacing:.4px;display:inline-flex;align-items:center;gap:4px;transition:all .2s ease}.badge-sync-audio.is-ai{background:#2ed57326;color:#2ed573;border:1px solid rgba(46,213,115,.4);box-shadow:0 0 8px #2ed57326}.badge-sync-audio.is-web{background:#e5b6541f;color:var(--accent-gold);border:1px solid rgba(229,182,84,.35)}.badge-sync-audio.is-syncing{background:#54a0ff26;color:#54a0ff;border:1px solid rgba(84,160,255,.4);animation:pulse-sync 1s infinite alternate}@keyframes pulse-sync{0%{opacity:.6}to{opacity:1}}.panel-actions-wrap{display:inline-flex;flex-wrap:wrap;align-items:center;gap:8px}.btn-sync-ai{background:#e5b6541f;border:1px solid rgba(229,182,84,.35);color:var(--accent-gold);font-size:.72rem;font-weight:700;padding:3px 9px;border-radius:5px;cursor:pointer;transition:all .2s ease;display:inline-flex;align-items:center;gap:4px}.btn-sync-ai:hover{background:#e5b65440;border-color:var(--accent-gold);box-shadow:0 0 10px #e5b65440}.btn-sync-ai:disabled{opacity:.6;cursor:not-allowed}.panel-hint{flex-basis:100%;font-size:.75rem;color:var(--text-dim)}.teleprompter-outer{flex:1;min-height:0;position:relative}.teleprompter-viewport{height:100%;overflow-y:auto;scroll-behavior:smooth;padding:16px 20px 70px}.teleprompter-sheet{display:flex;flex-direction:column;gap:8px}.teleprompter-empty{text-align:center;color:var(--text-dim);margin-top:40px;font-size:1rem}.tele-line{position:relative;padding:8px 14px 10px;border-radius:8px;cursor:pointer;transition:all .18s ease;opacity:.55;border-left:3px solid transparent}.tele-line:hover{background:#ffffff0a;opacity:.9}.tele-line.is-active{opacity:1;background:#e5b65417;border-left:3px solid var(--accent-gold);box-shadow:0 4px 18px #00000059}.tele-line.is-past{opacity:.4}.tele-line.tele-sec{padding-top:12px;padding-bottom:4px;opacity:.85}.tele-line.tele-sec .tele-lyric-row{color:var(--accent-gold);font-weight:700;font-size:.88rem;letter-spacing:.8px;text-transform:uppercase;opacity:.9}.tele-chords-row{font-family:var(--font-mono);font-size:1.05rem;font-weight:700;color:var(--accent-gold);white-space:pre;min-height:1.35em;line-height:1.35;margin-bottom:2px;pointer-events:none}.tele-chord-token{display:inline-block;padding:1px 6px;border-radius:4px;transition:all .15s ease;color:var(--accent-gold);pointer-events:auto;cursor:pointer}.tele-chord-token:hover{background:#e5b65438;color:#fff;transform:scale(1.08);box-shadow:0 0 8px #e5b6544d}.tele-chord-token.is-active{background:linear-gradient(135deg,var(--accent-gold),#cb9528);color:#08090e;box-shadow:0 0 14px var(--accent-gold-glow);font-weight:800;transform:translateY(-2px)}.tele-lyric-row{font-family:var(--font-mono);font-size:1.1rem;font-weight:500;color:var(--text-main);white-space:pre-wrap;line-height:1.35;letter-spacing:0}.tele-line.is-active .tele-lyric-row{color:#fff;font-weight:700}.tele-line-progress{position:absolute;bottom:0;left:0;height:3px;background:linear-gradient(90deg,var(--accent-lh),var(--accent-gold));width:0%;border-radius:2px;transition:width .08s linear}.app-footer{background:var(--bg-card);border-top:1px solid var(--border-color);padding:10px 16px;flex-shrink:0;z-index:10}.keyboard-wrapper{max-width:1400px;margin:0 auto}.keyboard-controls{display:flex;flex-wrap:wrap;gap:8px;align-items:center;justify-content:space-between;margin-bottom:6px}.kb-legend{display:flex;flex-wrap:wrap;align-items:center;gap:16px;font-size:.75rem;color:var(--text-muted)}.legend-item{display:flex;align-items:center;gap:6px}.legend-dot{width:9px;height:9px;border-radius:50%}.lh-dot{background:var(--accent-lh);box-shadow:0 0 8px var(--accent-lh)}.rh-dot{background:var(--accent-rh);box-shadow:0 0 8px var(--accent-rh)}.midi-dot{background:var(--accent-midi);box-shadow:0 0 8px var(--accent-midi)}.kb-modes{display:flex;align-items:center;gap:4px}.kb-tool-btn{background:var(--bg-card-sub);border:1px solid var(--border-color);color:var(--text-muted);font-size:.72rem;font-weight:600;padding:3px 8px;border-radius:4px;cursor:pointer;transition:all .15s}.kb-tool-btn.active,.kb-tool-btn:hover{background:var(--border-color);color:var(--text-main)}.piano-roll-mount{width:100%;height:clamp(120px,22vh,200px);background:#090a10;border:1px solid var(--border-color);border-bottom:none;border-radius:8px 8px 0 0;overflow:hidden;position:relative;box-shadow:inset 0 2px 12px #000000d9}.piano-roll-wrapper{width:100%;height:100%;position:relative}.piano-roll-canvas{width:100%;height:100%;display:block}.piano-roll-mount+.piano-svg-container{border-top-left-radius:0;border-top-right-radius:0;border-top:none}.piano-svg-container{width:100%;height:140px;overflow-x:auto;overflow-y:hidden;border-radius:8px;background:#08090e;border:1px solid var(--border-color);box-shadow:inset 0 3px 14px #000000f2,0 4px 20px #0006;transition:all .3s ease;position:relative}.piano-svg-container:before{content:"";position:sticky;left:0;top:0;display:block;width:100%;height:4px;background:linear-gradient(90deg,#7f1d1d,#b91c1c,#7f1d1d);box-shadow:0 1px 4px #000c;z-index:5}.piano-svg-container.zoomed{height:170px}.piano-svg-container.zoomed .piano-svg{width:200%}.piano-svg{width:100%;height:100%;display:block}.piano-key.white-key{fill:var(--key-ivory);stroke:#25283a;stroke-width:.8;transition:fill .12s,filter .12s;cursor:pointer}.piano-key.white-key:hover{fill:#fff;filter:brightness(1.04)}.piano-key.black-key{fill:var(--key-ebony);stroke:var(--key-ebony-stroke);stroke-width:.8;transition:fill .12s,filter .12s;cursor:pointer;filter:drop-shadow(0 3px 4px rgba(0,0,0,.75))}.piano-key.black-key:hover{fill:#222536}.c-octave-label{fill:#585e78;font-size:8px;font-family:var(--font-mono);font-weight:700;text-anchor:middle;pointer-events:none}.note-name-label{fill:#7d84a0;font-size:8px;font-family:var(--font-mono);font-weight:600;text-anchor:middle;opacity:.55;pointer-events:none;transition:opacity .15s,fill .15s}.note-name-label.black-label{fill:#9ea5c2;font-size:7px;opacity:.45}.finger-dot{fill:transparent;pointer-events:none;transition:all .15s}.key-group.active-lh .white-key{fill:var(--accent-lh)!important;filter:drop-shadow(0 0 12px var(--accent-lh-glow))!important}.key-group.active-lh .black-key{fill:#09c!important;filter:drop-shadow(0 0 12px var(--accent-lh-glow))!important}.key-group.active-lh .note-name-label{opacity:1;fill:#032030;font-weight:800}.key-group.active-lh .black-label{fill:#fff;font-weight:800}.key-group.active-lh .finger-dot{fill:#fff;stroke:#0077b6;stroke-width:2.5;filter:drop-shadow(0 0 4px #fff)}.key-group.active-rh .white-key{fill:var(--accent-rh)!important;filter:drop-shadow(0 0 12px var(--accent-rh-glow))!important}.key-group.active-rh .black-key{fill:#cc5a00!important;filter:drop-shadow(0 0 12px var(--accent-rh-glow))!important}.key-group.active-rh .note-name-label{opacity:1;fill:#260d00;font-weight:800}.key-group.active-rh .black-label{fill:#fff;font-weight:800}.key-group.active-rh .finger-dot{fill:#fff;stroke:#e65100;stroke-width:2.5;filter:drop-shadow(0 0 4px #fff)}.key-group.midi-pressed .white-key{fill:#a7f3d0!important;transform:translateY(2px)}.key-group.midi-pressed .black-key{fill:#065f46!important;transform:translateY(2px)}.key-group.midi-correct .white-key,.key-group.midi-correct .black-key{fill:var(--accent-midi)!important;filter:drop-shadow(0 0 14px var(--accent-midi))!important}.key-group.vocal-detected .white-key,.key-group.vocal-detected .black-key{fill:#a855f7!important;filter:drop-shadow(0 0 14px rgba(168,85,247,.85))!important}.key-group.vocal-detected .note-name-label{opacity:1!important;fill:#fff!important;font-weight:800}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#000000bf;display:flex;align-items:center;justify-content:center;z-index:100;opacity:0;pointer-events:none;transition:opacity .2s ease}.modal-backdrop.is-open{opacity:1;pointer-events:auto}.modal-dialog{background:var(--bg-card);border:1px solid var(--border-color);border-radius:12px;width:90%;max-width:650px;padding:20px;box-shadow:0 10px 30px #0009}.modal-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}.modal-close{background:transparent;border:none;font-size:1.6rem;color:var(--text-muted);cursor:pointer}.modal-instructions{font-size:.85rem;color:var(--text-muted);margin-bottom:10px}.modal-textarea{width:100%;background:var(--bg-card-sub);border:1px solid var(--border-color);color:var(--text-main);font-family:var(--font-mono);font-size:.9rem;padding:12px;border-radius:8px;resize:vertical;outline:none}.modal-foot{margin-top:14px;display:flex;justify-content:flex-end}.modal-foot-split{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}@media(max-width:950px){body{height:auto;min-height:100dvh}.app-main{grid-template-columns:1fr;overflow:visible;flex:none}.left-panel{max-width:100%}.video-container{max-height:220px}.right-panel{height:420px}}