:root{--bg:#0d0f0f;--surface:#121515;--raised:#171a1a;--raised-hover:#1c2020;--border:#ffffff14;--border-strong:#ffffff24;--text:#f2f0e9;--text-secondary:#a3a39d;--text-muted:#686a67;--accent:#e7c98c;--accent-dim:#e7c98c29;--accent-ink:#1a1710;--success:#7a9a7a;--success-dim:#7a9a7a2e;--danger:#c47a6a;--radius:10px;--radius-sm:8px;--font:"DM Sans", system-ui, sans-serif;--font-serif:"Instrument Serif", Georgia, serif;--header-h:56px;--footer-h:40px;--sidebar-w:300px;--focus:0 0 0 2px var(--bg), 0 0 0 4px #e7c98c73}*,:before,:after{box-sizing:border-box}html,body,#root{height:100%}body{background:var(--bg);color:var(--text);font-family:var(--font);font-optical-sizing:auto;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;margin:0;font-size:14px;line-height:1.45;overflow:hidden}button,input,textarea{font:inherit;color:inherit}button{cursor:pointer;background:0 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1.25rem;font-size:14px;font-weight:600;transition:filter .12s}.empty-start:hover:not(:disabled){filter:brightness(1.05)}.empty-error{color:var(--danger);margin:0;font-size:13px}.empty-support{color:var(--text-muted);margin:1.75rem 0 0;font-size:13px;line-height:1.5}.setup-tempo{background:radial-gradient(ellipse 55% 35% at 50% 0%, #e7c98c0d, transparent 65%), var(--bg);flex-direction:column;height:100%;min-height:0;display:flex;overflow:auto}.setup-tempo-main{flex-direction:column;gap:1.1rem;width:min(720px,100%);margin:0 auto;padding:1.5rem 1.25rem 2rem;display:flex}.setup-tempo-header{text-align:left}.setup-tempo-step{letter-spacing:.08em;text-transform:uppercase;color:var(--text-muted);margin:0 0 .35rem;font-size:11px;font-weight:600}.setup-tempo-title{letter-spacing:-.02em;color:var(--text);margin:0 0 .45rem;font-size:clamp(1.45rem,3vw,1.85rem);font-weight:650}.setup-tempo-lede{max-width:38rem;color:var(--text-secondary);margin:0;font-size:14px;line-height:1.45}.setup-tempo-player .player-frame{max-height:min(42vh,440px)}.setup-tempo-controls{flex-direction:column;gap:.85rem;display:flex}.setup-tempo-transport{flex-wrap:wrap;align-items:center;gap:.65rem .85rem;display:flex}.setup-tempo-time{font-variant-numeric:tabular-nums;color:var(--text);align-items:center;gap:.4rem;min-width:6.5rem;font-size:15px;font-weight:600;display:inline-flex}.setup-seed{border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);flex-direction:column;gap:.55rem;padding:.85rem .95rem;display:flex}.setup-seed.is-marking{border-color:var(--border-strong)}.setup-seed.is-ready{border-color:#e7c98c59}.setup-seed-status{color:var(--text-secondary);font-size:13px}.setup-seed-status strong{color:var(--text);font-variant-numeric:tabular-nums}.setup-seed-edges{flex-direction:column;gap:.75rem;width:100%;display:flex}.setup-seed-edge{flex-direction:column;align-items:flex-start;gap:.35rem;width:100%;display:flex}.setup-seed-edge-label{color:var(--text-secondary);font-size:13px}.setup-seed-edge-label strong{color:var(--text);font-variant-numeric:tabular-nums}.setup-seed-bpm{color:var(--accent);font-weight:600}.setup-seed-looping{color:var(--text-muted)}.setup-seed-actions{flex-wrap:wrap;align-items:center;gap:.5rem;display:flex}.setup-preview{flex-wrap:wrap;align-items:center;gap:.4rem;width:100%;padding-top:.15rem;display:flex}.setup-preview-label{color:var(--text-muted);letter-spacing:.06em;text-transform:uppercase;margin-right:.15rem;font-size:11px;font-weight:500}.setup-preview-meta{color:var(--text-muted);font-variant-numeric:tabular-nums;margin-left:.25rem;font-size:12px}.setup-seed-hint{color:var(--text-muted);margin:0;font-size:12px;line-height:1.4}.setup-click{border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--raised);flex-wrap:wrap;align-items:center;gap:.75rem 1.25rem;padding:.65rem 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.75rem;display:flex;overflow:auto}.player-frame{aspect-ratio:16/9;border-radius:var(--radius);border:1px solid var(--border);background:#000;flex-shrink:0;width:100%;max-height:min(48vh,520px);position:relative;overflow:hidden}.player-frame iframe,.player-frame>div{position:absolute;inset:0;width:100%!important;height:100%!important}.player-placeholder{height:100%;color:var(--text-muted);place-items:center;font-size:13px;display:grid}.lyric-cue{border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);grid-template-columns:2.5rem 1fr;align-items:start;gap:.75rem;min-height:3.25rem;padding:.55rem .85rem;display:grid}.lyric-cue-num{color:var(--accent);font-variant-numeric:tabular-nums;letter-spacing:.04em;padding-top:.15rem;font-size:13px;font-weight:600}.lyric-cue[data-empty] 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var(--border);border-radius:var(--radius);background:var(--surface);flex-wrap:wrap;flex-shrink:0;align-items:center;gap:1.25rem 1.75rem;padding:.65rem .85rem;display:flex}.transport-group{align-items:center;gap:.65rem;display:flex}.transport-label{color:var(--text-muted);letter-spacing:.06em;text-transform:uppercase;font-size:11px;font-weight:500}.bpm-value{font-variant-numeric:tabular-nums;letter-spacing:-.02em;min-width:2.5rem;font-size:1.75rem;font-weight:600;line-height:1}.bpm-value.is-empty{color:var(--text-muted);font-size:1.1rem;font-weight:500}.bpm-group{align-items:flex-start;position:relative}.bpm-field-wrap{position:relative}.bpm-input{border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--raised);width:4.25rem;height:40px;color:var(--text);font-variant-numeric:tabular-nums;letter-spacing:-.02em;text-align:center;padding:0 .5rem;font-size:1.35rem;font-weight:600;line-height:1}.bpm-input.is-empty{color:var(--text-muted);font-weight:500}.bpm-input:focus{border-color:var(--border-strong)}.bpm-popover{z-index:20;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--raised);flex-wrap:wrap;align-items:center;gap:.4rem;min-width:180px;max-width:260px;padding:.55rem .6rem;display:flex;position:absolute;top:calc(100% + 8px);left:0;box-shadow:0 10px 28px #00000073}.bpm-popover:before{content:"";border-left:1px solid var(--border);border-top:1px solid var(--border);background:var(--raised);width:8px;height:8px;position:absolute;top:-5px;left:1.1rem;transform:rotate(45deg)}.bpm-tap{flex:1;min-width:5.5rem}.bpm-popover-meta{color:var(--text-muted);flex-basis:100%;margin:.15rem 0 0;font-size:11px;line-height:1.35}.bpm-segment-hint{color:var(--text-muted);align-self:center;font-size:11px}.part-actions{margin-left:auto}.btn-outline{border:1px solid 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.12s}.speed-btn:hover:not(:disabled){background:var(--raised);color:var(--text)}.speed-btn.is-active{background:var(--accent);color:var(--accent-ink)}.icon-btn{border:1px solid var(--border);width:28px;height:28px;color:var(--text-secondary);border-radius:6px;place-items:center;font-size:14px;line-height:1;transition:background .12s,color 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var(--border);border-radius:var(--radius);background:var(--surface);-webkit-user-select:none;user-select:none;touch-action:none;height:72px;position:relative;overflow:hidden}.timeline-scroll{position:absolute;inset:0;overflow:auto hidden}.timeline-scroll::-webkit-scrollbar{height:6px}.timeline-scroll::-webkit-scrollbar-thumb{background:var(--border-strong);border-radius:3px}.timeline-canvas{cursor:default;min-width:100%;height:100%;position:relative}.timeline-canvas.is-drawing{cursor:crosshair}.legend-hint{color:var(--text-muted);opacity:.85}.timeline-grid-line{background:var(--border);pointer-events:none;width:1px;position:absolute;top:0;bottom:0}.timeline-grid-line.measure{background:#ffffff24}.timeline-measure-label{color:var(--text-muted);font-variant-numeric:tabular-nums;pointer-events:none;font-size:10px;position:absolute;top:6px;transform:translate(-50%)}.timeline-beat-dot{background:var(--text-muted);opacity:.55;pointer-events:none;border-radius:50%;width:3px;height:3px;position:absolute;bottom:10px;transform:translate(-50%)}.loop-region{cursor:grab;background:#ffffff0a;border:1px solid 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.loop-handle:after{background:#ffffff59}.loop-handle.start{left:-2px}.loop-handle.end{right:-2px}.playhead{background:var(--text);z-index:4;pointer-events:none;width:1px;position:absolute;top:0;bottom:0}.playhead:before{content:"";border-left:4px solid #0000;border-right:4px solid #0000;border-top:5px solid var(--text);position:absolute;top:0;left:-3px}.timeline-legend{color:var(--text-muted);flex-wrap:wrap;gap:1rem;font-size:11px;display:flex}.legend-item{align-items:center;gap:.4rem;display:inline-flex}.legend-beat{background:var(--text-muted);border-radius:50%;width:4px;height:4px}.legend-loop{border:1px solid #ffffff38;border-radius:2px;width:14px;height:8px}.legend-current{background:var(--accent);border-radius:2px;width:14px;height:8px}.timeline-empty{border:1px dashed 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strong{color:var(--accent);font-weight:600}.bar-mark-playhead{color:var(--text-muted);font-variant-numeric:tabular-nums}.bar-mark-actions{align-items:center;gap:.5rem;display:flex}.bar-mark-hint{color:var(--text-muted);max-width:36ch;margin:0;font-size:12px;line-height:1.4}.bar-mark-error{color:var(--danger);max-width:36ch;margin:0;font-size:12px;line-height:1.4}.bar-mark-time{font-variant-numeric:tabular-nums;letter-spacing:.02em;color:var(--text);align-items:baseline;gap:.45rem;font-size:1.15rem;font-weight:600;display:inline-flex}.bar-mark-locked{letter-spacing:.08em;text-transform:uppercase;color:var(--accent);font-size:10px;font-weight:500}.playhead-nudge{flex-wrap:wrap;justify-content:center;align-items:center;gap:.25rem;display:flex}.nudge-btn{border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--raised);min-width:2.4rem;height:26px;color:var(--text-secondary);font-variant-numeric:tabular-nums;padding:0 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80ms;display:grid}.play-btn:hover:not(:disabled){filter:brightness(1.05)}.play-btn:active:not(:disabled){transform:scale(.97)}.play-btn svg{width:22px;height:22px}.play-btn.is-playing svg{width:18px;height:18px}.key-hints{color:var(--text-muted);flex-wrap:wrap;justify-content:center;gap:1rem 1.5rem;font-size:11px;display:flex}.key-hints span{align-items:center;gap:.35rem;display:inline-flex}.sidebar{border-left:1px solid var(--border);background:var(--surface);flex-direction:column;min-height:0;display:flex}.track-card{border-bottom:1px solid var(--border);gap:.75rem;padding:1rem 1rem .85rem;display:flex}.track-thumb{object-fit:cover;background:var(--raised);border:1px solid var(--border);border-radius:6px;flex-shrink:0;width:56px;height:56px}.track-meta{flex-direction:column;gap:.15rem;min-width:0;display:flex}.track-title{white-space:nowrap;text-overflow:ellipsis;margin:0;font-size:14px;font-weight:600;overflow:hidden}.track-artist{color:var(--text-secondary);white-space:nowrap;text-overflow:ellipsis;margin:0;font-size:12px;overflow:hidden}.track-link{color:var(--text-muted);margin-top:.25rem;font-size:11px}.track-link:hover{color:var(--accent)}.sidebar-section-label{color:var(--text-muted);letter-spacing:.08em;text-transform:uppercase;justify-content:space-between;align-items:center;padding:.75rem 1rem .4rem;font-size:11px;font-weight:600;display:flex}.bars-list{flex:1;min-height:0;margin:0;padding:.25rem .5rem 1rem;list-style:none;overflow:auto}.bar-item{border-radius:var(--radius-sm);width:100%;color:var(--text-secondary);text-align:left;cursor:pointer;grid-template-columns:1.5rem 1fr auto;align-items:center;gap:.5rem;padding:.55rem .65rem;transition:background .12s,color .12s;display:grid}.bar-item:hover{background:var(--raised);color:var(--text)}.bar-item.is-active{background:var(--accent-dim);color:var(--accent)}.bar-item.is-mastered:not(.is-active){color:var(--text-secondary)}.bar-num{font-variant-numeric:tabular-nums;color:inherit;font-size:12px;font-weight:600}.bar-name{white-space:nowrap;text-overflow:ellipsis;font-size:13px;overflow:hidden}.bar-status{align-items:center;gap:.35rem;display:flex}.bar-check{width:14px;height:14px;color:var(--success)}.eq-dots{align-items:flex-end;gap:2px;height:12px;display:flex}.eq-dots span{background:var(--accent);border-radius:1px;width:2px;animation:.7s ease-in-out infinite eq}.eq-dots span:first-child{height:4px;animation-delay:0s}.eq-dots span:nth-child(2){height:10px;animation-delay:.15s}.eq-dots span:nth-child(3){height:6px;animation-delay:.3s}@keyframes eq{0%,to{transform:scaleY(.45)}50%{transform:scaleY(1)}}.bars-empty{color:var(--text-muted);padding:1rem;font-size:13px;line-height:1.5}.bar-item-menu{opacity:0;transition:opacity .12s}.bar-item:hover .bar-item-menu,.bar-item:focus-within .bar-item-menu{opacity:1}.ghost-btn{color:var(--text-muted);border-radius:4px;padding:.15rem .3rem;font-size:11px}.ghost-btn:hover{color:var(--text);background:var(--raised-hover)}.ghost-btn.is-on{color:var(--accent)}.sidebar-section-actions{align-items:center;gap:.35rem;display:flex}.bars-grouped{flex:1;min-height:0;padding:.15rem .5rem 1rem;overflow:auto}.part-group{margin-bottom:.65rem}.part-group-header{align-items:center;gap:.35rem;padding:.35rem .5rem 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.35rem;display:flex;position:absolute;top:2px;overflow:hidden}.part-block-label{letter-spacing:.04em;text-transform:uppercase;color:var(--text-secondary);white-space:nowrap;text-overflow:ellipsis;font-size:9px;font-weight:600;overflow:hidden}.part-block-delete{color:var(--text-muted);opacity:0;margin-left:auto;font-size:11px;line-height:1}.part-block:hover .part-block-delete{opacity:1}.tempo-marker{pointer-events:auto;cursor:ew-resize;z-index:5;flex-direction:column;align-items:center;display:flex;position:absolute;top:0;transform:translate(-50%)}.tempo-marker:before{content:"";background:var(--accent);opacity:.7;width:1px;height:14px}.tempo-marker-label{background:var(--accent-dim);color:var(--accent);font-variant-numeric:tabular-nums;border-radius:3px;margin-top:1px;padding:0 3px;font-size:9px;font-weight:600;line-height:1.3}.footer{border-top:1px solid var(--border);color:var(--text-muted);justify-content:space-between;align-items:center;padding:0 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em{color:var(--text);text-overflow:ellipsis;white-space:nowrap;vertical-align:bottom;max-width:14rem;font-style:normal;display:inline-block;overflow:hidden}.lyrics-queue-status-actions{flex-wrap:wrap;gap:.35rem;display:flex}.lyrics-paste-warn{margin:.5rem 0 0;line-height:1.4}.lyrics-paste-columns{grid-template-columns:1fr 1fr;gap:.85rem;min-height:0;display:grid}@media (width<=640px){.lyrics-paste-columns{grid-template-columns:1fr}}.lyrics-paste-col{border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface);flex-direction:column;min-width:0;max-height:280px;padding:.5rem .55rem .65rem;display:flex}.lyrics-paste-col-title{letter-spacing:.06em;text-transform:uppercase;color:var(--text-muted);margin:0 0 .4rem;font-size:11px;font-weight:600}.lyrics-paste-list{flex:1;min-height:0;margin:0;padding:0;list-style:none;overflow:auto}.lyrics-token,.lyrics-map-row{border-bottom:1px solid var(--border);align-items:center;gap:.4rem;padding:.3rem .2rem;font-size:12px;display:grid}.lyrics-token{grid-template-columns:1.5rem 4.5rem 1fr}.lyrics-map-row{grid-template-columns:1.75rem 1rem 1fr}.lyrics-token:last-child,.lyrics-map-row:last-child{border-bottom:none}.lyrics-token-idx,.lyrics-map-bar{font-variant-numeric:tabular-nums;color:var(--text-muted);font-weight:600}.lyrics-token-role{border:1px solid var(--border);background:var(--raised);height:26px;color:var(--text-secondary);border-radius:4px;padding:0 .25rem;font-size:11px}.lyrics-token-text,.lyrics-map-lyric{white-space:nowrap;text-overflow:ellipsis;min-width:0;color:var(--text);overflow:hidden}.lyrics-token.role-section .lyrics-token-text{color:var(--accent);font-style:italic}.lyrics-token.role-skip .lyrics-token-text,.lyrics-map-row.is-empty .lyrics-map-lyric,.lyrics-map-row.is-unused .lyrics-map-lyric{color:var(--text-muted);font-style:italic}.lyrics-map-arrow{color:var(--text-muted);text-align:center}.lyrics-parts-preview{border-top:1px solid var(--border);margin-top:.65rem;padding-top:.5rem}.lyrics-parts-toggle{color:var(--text-secondary);cursor:pointer;align-items:flex-start;gap:.55rem;margin:.85rem 0 0;font-size:13px;line-height:1.4;display:flex}.lyrics-parts-toggle input{accent-color:var(--accent);margin-top:.2rem}.lyrics-parts-toggle code{color:var(--text);font-size:12px}.modal-wide code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px}.btn-ghost{border-radius:var(--radius-sm);height:36px;color:var(--text-secondary);padding:0 .85rem;font-size:13px;font-weight:500}.btn-ghost:hover{color:var(--text);background:var(--surface)}.btn-primary{border-radius:var(--radius-sm);background:var(--accent);height:36px;color:var(--accent-ink);padding:0 .95rem;font-size:13px;font-weight:600}.btn-primary:hover:not(:disabled){filter:brightness(1.05)}@media (width<=960px){body{overflow:auto}.app-shell{height:auto;min-height:100%}.practice{grid-template-columns:1fr;height:auto}.sidebar{border-left:none;border-top:1px solid var(--border);max-height:40vh}.player-frame{max-height:none}.search-trigger{flex:1;min-width:0}.search-trigger span:first-child{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.transport-hint{display:none}}.landing{min-height:0;overflow-y:auto}.landing .empty{height:auto;min-height:min(640px,78vh)}.landing-details{width:min(960px,100%);color:var(--text-secondary);margin:0 auto;padding:0 40px 32px;line-height:1.75}.landing-details p{margin:0}.landing-details h2{color:var(--text);font-family:var(--font-serif);letter-spacing:-.025em;margin:0;font-size:clamp(32px,4vw,44px);font-weight:400;line-height:1.12}.landing-details h2 em{color:var(--accent);font-weight:400}.landing-details .landing-label{color:var(--text-secondary);font-family:var(--font);letter-spacing:.13em;text-transform:uppercase;margin:0 0 20px;font-size:10px;font-weight:500;line-height:1.5}.landing-overview{border-top:1px solid var(--border-strong);grid-template-columns:1fr 1fr;align-items:center;gap:56px;padding:48px 0 56px;display:grid}.landing-overview-copy{font-size:14px}.landing-overview-copy .landing-note{color:var(--accent);margin-top:20px;font-size:12px}.landing-method{border-top:1px solid var(--border);padding:40px 0 56px}.landing-steps{grid-template-columns:repeat(3,1fr);gap:36px;margin:28px 0 0;padding:0;list-style:none;display:grid}.landing-step-number{border-bottom:1px solid var(--border-strong);color:var(--accent);font-variant-numeric:tabular-nums;letter-spacing:.08em;padding-bottom:16px;font-size:11px;display:block}.landing-steps h3{color:var(--text);font-weight:400;font-family:var(--font-serif);margin:22px 0 10px;font-size:29px;line-height:1.2}.landing-steps p{font-size:13px}.landing-repertoire{border-top:1px solid var(--border);grid-template-columns:1fr 1fr;gap:64px;padding:48px 0 56px;display:grid}.landing-repertoire h2{margin-bottom:22px}.landing-repertoire p:not(.landing-label){max-width:340px;font-size:13px}.landing-instruments{margin:0;padding:0;list-style:none}.landing-instruments li{border-bottom:1px solid var(--border);justify-content:space-between;align-items:baseline;gap:16px;padding:14px 0;display:flex}.landing-instruments li:first-child{padding-top:0}.landing-instruments span{color:var(--text);font-family:var(--font-serif);font-size:25px}.landing-instruments small{text-align:right;font-size:11px}.landing-faq{border-top:1px solid var(--border);grid-template-columns:1fr 1.5fr;gap:48px;padding:48px 0 64px;display:grid}.landing-questions details{border-bottom:1px solid var(--border)}.landing-questions summary{cursor:pointer;color:var(--text);padding:17px 28px 17px 0;font-size:13px;line-height:1.5;list-style:none;position:relative}.landing-questions details:first-child summary{padding-top:0}.landing-questions summary::-webkit-details-marker{display:none}.landing-questions summary:after{content:"+";color:var(--accent);font-size:18px;line-height:1;position:absolute;right:0}.landing-questions details[open] summary:after{content:"−"}.landing-questions summary:hover{color:var(--accent)}.landing-questions summary:focus-visible{outline:2px solid var(--accent);outline-offset:4px;border-radius:2px}.landing-questions p{padding:0 20px 20px 0;font-size:13px}.landing-credit{border-top:1px solid var(--border);justify-content:space-between;gap:20px;padding-top:24px;font-size:11px;display:flex}.landing-credit a{color:var(--text-secondary);text-decoration:none}.landing-credit a:hover{color:var(--accent)}@media (width<=680px){.landing-details{padding:0 24px 32px}.landing-overview,.landing-repertoire,.landing-faq{grid-template-columns:1fr;gap:28px;padding:36px 0}.landing-overview-copy{max-width:440px}.landing-steps{grid-template-columns:1fr;gap:24px}.landing-steps li{grid-template-columns:32px 1fr;column-gap:16px;display:grid}.landing-step-number{border:0;grid-row:span 2;padding-top:7px}.landing-steps h3{margin:0 0 8px}.landing-steps p{grid-column:2}.landing-method{padding:32px 0 36px}.landing-credit{flex-direction:column;gap:8px}}