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30px;color:var(--ink);background:transparent;border-color:var(--ink-65);border-radius:0;transition:background var(--t-micro),color var(--t-micro),box-shadow var(--t-micro),transform var(--t-bounce)}#start-btn:hover{background:var(--ink);color:var(--paper);box-shadow:none}#start-btn:active{transform:scale(.97)}.start-note{font-family:var(--font-mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-40)}#loading{position:fixed;top:0;right:0;bottom:0;left:0;z-index:99;display:flex;align-items:center;justify-content:center;background:var(--paper)}.loading-inner{text-align:center;font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-65)}.spinner{width:64px;height:1px;background:var(--ink-22);position:relative;overflow:hidden;margin:0 auto 18px}.spinner:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:var(--ink);animation:slide 1.3s ease-in-out infinite}@keyframes slide{0%{transform:translate(-100%)}to{transform:translate(100%)}}#app{--gutter: 24px;height:100vh;display:grid;grid-template-columns:var(--left-w, 320px) 1fr var(--right-w, 0px);grid-template-rows:56px 1fr 40px;grid-template-areas:"header header header" "sidebar stage panel" "footer footer footer";padding:32px;column-gap:var(--gutter);position:relative;z-index:2;transition:grid-template-columns var(--t-layout),column-gap var(--t-layout)}#app[data-right=open]{--right-w: 380px}#app[data-left=collapsed]{--left-w: 0px}.app-header{grid-area:header;display:flex;align-items:center;justify-content:space-between;padding:0 4px 16px;border-bottom:1px solid var(--ink-22)}.hdr-left{display:flex;align-items:center;gap:14px;min-width:0}.hdr-title{font-family:var(--font-sans);font-weight:500;font-size:14px;letter-spacing:.01em;color:var(--ink);white-space:nowrap}.hdr-sep{color:var(--ink-22);font-family:var(--font-mono);font-size:11px}.hdr-meta{font-family:var(--font-mono);font-size:10px;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-40);display:inline-flex;align-items:center;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0}.hdr-btn{font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;padding:8px 16px;color:var(--ink);border:1px solid var(--ink-22);border-radius:0;transition:all var(--t-micro);white-space:nowrap;flex-shrink:0}.hdr-btn:hover{background:var(--ink);color:var(--paper);box-shadow:none}.hdr-btn .mb-full{display:inline}.hdr-btn .mb-short{display:none}.app-sidebar{grid-area:sidebar;padding:20px 0;border-right:1px solid var(--ink-22);display:flex;flex-direction:column;gap:24px;overflow-y:auto;overflow-x:hidden;position:relative;transition:opacity var(--t-micro)}#app[data-left=collapsed] .app-sidebar{opacity:0;pointer-events:none;border-right:0;padding:0}#app[data-left=open] #toggle-left,#app[data-right=open] #menu-btn{background:var(--ink);color:var(--paper)}.sb-block{display:flex;flex-direction:column}.sb-label{font-family:var(--font-mono);font-size:10px;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-40);margin-bottom:8px;padding-bottom:6px;border-bottom:1px solid var(--ink-12)}#note-name{font-family:var(--font-sans);font-weight:400;font-size:3.6rem;letter-spacing:-.03em;line-height:1;color:var(--ink);font-variant-numeric:tabular-nums;transition:color var(--t-micro)}#note-detail{font-family:var(--font-mono);font-size:10px;letter-spacing:.12em;color:var(--ink-65);margin-top:6px;min-height:14px}#gesture-indicators{display:flex;flex-wrap:wrap;gap:4px;min-height:20px}.g-badge{font-family:var(--font-mono);font-size:10px;letter-spacing:.12em;padding:3px 8px;border:1px solid currentColor;text-transform:uppercase;font-variant-numeric:tabular-nums}.g-vib,.g-cut{color:var(--ink)}.g-mute{color:color-mix(in srgb,var(--ink) 70%,#ff5a44)}#gesture-indicators:empty:before{content:"idle";font-family:var(--font-mono);font-size:10px;color:var(--ink-22);letter-spacing:.14em;text-transform:uppercase}.sb-viz{display:flex;flex-direction:column}#viz-canvas{width:100%;aspect-ratio:1 / 1;height:auto;background:var(--paper-2);border:1px solid var(--ink);display:block;transition:background var(--t-color)}.vol-row{display:flex;align-items:stretch;gap:10px;height:80px}#vol-meter{width:4px;height:100%;background:var(--ink-12);position:relative;overflow:hidden}#vol-fill{position:absolute;bottom:0;width:100%;height:0%;background:var(--ink);transition:height .05s}.vol-ticks{display:flex;flex-direction:column;justify-content:space-between;font-family:var(--font-mono);font-size:9px;letter-spacing:.08em;color:var(--ink-40)}.app-stage{grid-area:stage;padding:0;min-width:0;position:relative}.stage-frame{position:relative;width:100%;height:100%;min-height:320px;border:1px solid var(--ink);background:var(--stage);overflow:hidden}#overlay{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;pointer-events:none}.stage-vol-rail{position:absolute;right:14px;top:32px;bottom:32px;width:3px;background:#c8c4bc1f;pointer-events:none;z-index:2}.stage-vol-fill{position:absolute;left:0;right:0;bottom:0;height:0%;background:#c8c4bc9e;transition:height 60ms linear}.stage-vol-label{position:absolute;top:-16px;left:-6px;font-family:var(--font-mono);font-size:8px;letter-spacing:.22em;color:#c8c4bc8c}.stage-labels{position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none}.stage-label{position:absolute;font-family:var(--font-mono);font-size:9px;letter-spacing:.18em;text-transform:uppercase;color:#f0ede58c;padding:10px 14px}.sl-tl{top:0;left:0}.sl-tr{top:0;right:0}.sl-bl{bottom:0;left:0}.sl-br{bottom:0;right:0}.app-footer{grid-area:footer;display:flex;align-items:center;padding:0 4px;border-top:1px solid var(--ink-22)}.foot-stat{display:flex;align-items:baseline;gap:8px;padding:0 20px;font-variant-numeric:tabular-nums;white-space:nowrap;flex-shrink:0}.foot-stat:first-child{padding-left:0}.foot-sep{width:1px;height:14px;background:var(--ink-22);flex-shrink:0}.fk{font-family:var(--font-mono);font-size:10px;letter-spacing:.18em;white-space:nowrap;text-transform:uppercase;color:var(--ink-40)}.fv{font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;color:var(--ink);white-space:nowrap}.foot-spacer{flex:1}.foot-end{font-family:var(--font-mono);font-size:10px;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-40);padding-right:0}#panel{grid-area:panel;background:var(--paper);border-left:1px solid var(--ink-22);overflow-y:auto;overflow-x:hidden;transition:opacity var(--t-micro),background var(--t-color);opacity:1;pointer-events:auto;position:relative}#app:not([data-right=open]) #panel{opacity:0;pointer-events:none;border-left:0;padding:0}@media(max-width:1000px){#panel{position:fixed;top:32px;right:32px;bottom:32px;width:360px;border:1px solid var(--ink);border-left:1px solid var(--ink);padding:0;background:var(--paper);box-shadow:0 12px 40px #0000001a;z-index:50;transform:translate(calc(100% + 48px));transition:transform var(--t-layout),background var(--t-color);opacity:0;pointer-events:none}#app:not([data-right=open]) #panel{opacity:0;padding:0;border:1px solid var(--ink)}#app[data-right=open] #panel{transform:translate(0);opacity:1;pointer-events:auto}}.panel-inner{padding:28px 28px 40px}.panel-header{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:28px;padding-bottom:14px;border-bottom:1px solid var(--ink-22)}.panel-header h2{font-family:var(--font-sans);font-weight:500;font-size:1rem;color:var(--ink)}.panel-header button{font-size:1.4rem;color:var(--ink-65);line-height:1;padding:0 4px}.panel-header button:hover{color:var(--ink)}.panel-section{margin-bottom:26px}.panel-section h3{font-family:var(--font-mono);font-size:10px;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-40);margin-bottom:10px}.subtle-h3{margin-top:14px}#preset-list{display:flex;flex-direction:column}.preset-btn{font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;padding:10px 0;color:var(--ink-65);text-align:left;text-transform:uppercase;display:grid;grid-template-columns:28px 1fr auto;align-items:center;border-top:1px solid var(--ink-12);transition:color var(--t-micro),background var(--t-micro)}.preset-btn:before{content:attr(data-index);color:var(--ink-40);font-size:9px}.preset-btn:last-child{border-bottom:1px solid var(--ink-12)}.preset-btn:hover{color:var(--ink);background:var(--ink-03)}.preset-btn.active{color:var(--ink)}.preset-btn.active:after{content:"●";font-size:7px;color:var(--ink)}#range-options,#viz-modes,#viz-themes{display:grid;grid-template-columns:repeat(4,1fr);gap:4px;margin-bottom:8px}#range-options,#viz-modes{grid-template-columns:repeat(4,1fr)}.range-btn,.viz-mode-btn,.viz-theme-btn{font-family:var(--font-mono);font-size:10px;letter-spacing:.08em;padding:7px 6px;color:var(--ink-65);border:1px solid var(--ink-22);text-transform:uppercase;border-radius:0;transition:all var(--t-micro);min-width:0;text-align:center;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.range-btn:hover,.viz-mode-btn:hover,.viz-theme-btn:hover{color:var(--ink);border-color:var(--ink-65);background:var(--ink-06)}.range-btn.active,.viz-mode-btn.active,.viz-theme-btn.active{background:var(--ink);color:var(--paper);box-shadow:none}.toggle{display:flex;align-items:center;gap:10px;font-family:var(--font-mono);font-size:11px;letter-spacing:.05em;color:var(--ink-65);cursor:pointer;text-transform:uppercase;padding:6px 0;transition:color var(--t-micro)}.toggle:hover{color:var(--ink)}.toggle input{accent-color:var(--ink)}.inline-btn{margin-top:10px;font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;color:var(--ink);text-align:left;text-transform:uppercase;padding:0;text-decoration:underline;text-decoration-color:var(--ink-40);text-underline-offset:4px;transition:text-decoration-color var(--t-micro)}.inline-btn:hover{text-decoration-color:var(--ink)}.slider-labels{display:flex;justify-content:space-between;font-family:var(--font-mono);font-size:9px;letter-spacing:.15em;color:var(--ink-40);text-transform:uppercase;margin-top:4px}#song-list{display:flex;flex-direction:column}.song-btn{font-family:var(--font-sans);font-size:12px;padding:12px 8px;color:var(--ink);text-align:left;display:grid;grid-template-columns:28px 1fr auto;align-items:center;gap:8px;border-top:1px solid var(--ink-12);transition:color var(--t-micro),background var(--t-micro)}.song-btn:last-child{border-bottom:1px solid var(--ink-12)}.song-btn:hover{color:var(--ink);background:var(--ink-06)}.song-index{font-family:var(--font-mono);font-size:10px;letter-spacing:.12em;color:var(--ink-40)}.song-difficulty{font-family:var(--font-mono);font-size:9px;letter-spacing:.15em;color:var(--ink-40);text-transform:uppercase}#theme-swatches{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:6px}.theme-swatch{display:flex;flex-direction:column;align-items:center;cursor:pointer;padding:4px;border-radius:6px;transition:background var(--t-micro)}.theme-swatch:hover{background:var(--ink-03)}.theme-swatch.active{background:var(--ink-06)}.theme-swatch-inner{display:block;width:32px;height:32px;border-radius:50%;border:1px solid var(--ink-22);position:relative;overflow:hidden}.theme-swatch.active .theme-swatch-inner{border-color:var(--ink)}.theme-swatch-inner:before,.theme-swatch-inner:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0}.theme-swatch-inner:before{background:var(--sw-paper);clip-path:polygon(0 0,100% 0,0 100%)}.theme-swatch-inner:after{background:var(--sw-ink);clip-path:polygon(100% 0,100% 100%,0 100%)}.theme-swatch-label{font-family:var(--font-mono);font-size:9px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-65);margin-top:6px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:100%}.theme-swatch.active .theme-swatch-label{color:var(--ink)}#lesson-hud{position:fixed;top:32px;left:32px;right:32px;z-index:20;pointer-events:none}.lesson-bar{display:flex;justify-content:space-between;align-items:center;padding:12px 20px;background:var(--paper);border-bottom:1px solid var(--ink);font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;pointer-events:auto}#lesson-title{color:var(--ink);font-weight:500}#lesson-score-display{color:var(--ink);font-size:14px;font-variant-numeric:tabular-nums}#lesson-quit{color:var(--ink-65);font-size:1.2rem}#lesson-target{text-align:center;padding:16px}#target-note{font-family:var(--font-sans);font-weight:400;font-size:2.2rem;letter-spacing:-.02em;color:var(--ink)}#target-status{display:block;font-family:var(--font-mono);font-size:10px;letter-spacing:.18em;color:var(--ink-65);text-transform:uppercase;margin-top:4px}#results{position:fixed;top:0;right:0;bottom:0;left:0;z-index:90;display:flex;align-items:center;justify-content:center;background:var(--paper-60);backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px)}.results-content{text-align:center;max-width:420px;padding:40px 44px;background:var(--paper);border:1px solid var(--ink);box-shadow:0 12px 40px #0000001f}.results-content h2{font-family:var(--font-mono);font-size:11px;letter-spacing:.22em;color:var(--ink-40);text-transform:uppercase;margin-bottom:24px}#results-grade{font-family:var(--font-sans);font-weight:500;font-size:6rem;line-height:1;margin-bottom:28px;letter-spacing:-.04em;color:var(--ink)}#results-details{font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:var(--ink-65);margin-bottom:28px;line-height:2.2;text-transform:uppercase}.results-actions{display:flex;gap:8px;justify-content:center}.results-actions button{font-family:var(--font-mono);font-size:10px;letter-spacing:.18em;padding:10px 24px;color:var(--ink);border-color:var(--ink-65);border-radius:0;text-transform:uppercase;transition:all var(--t-micro)}.results-actions button:first-child{background:var(--ink-06)}.results-actions button:hover{background:var(--ink);color:var(--paper);box-shadow:none}.grade-s{color:var(--accent)}.grade-a{color:#4a7a3a}.grade-b{color:#2c3e5c}.grade-c{color:#b06a2a}.grade-d{color:#8c2a1a}#tutorial{position:fixed;top:0;right:0;bottom:0;left:0;z-index:80;display:flex;align-items:center;justify-content:center;background:var(--paper-60);backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px)}.tutorial-step{background:var(--paper);border:1px solid var(--ink);box-shadow:0 12px 40px #0000001f;padding:36px 40px;max-width:460px}#tutorial-content{margin-bottom:24px}#tutorial-content h3{font-family:var(--font-sans);font-weight:500;font-size:1.5rem;letter-spacing:-.01em;color:var(--ink);margin-bottom:14px}#tutorial-content p{color:var(--ink-65);font-size:.95rem;line-height:1.55}#tutorial-next{font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;padding:10px 24px;color:var(--ink);border-color:var(--ink-65);border-radius:0;text-transform:uppercase;transition:all var(--t-micro)}#tutorial-next:hover{background:var(--ink);color:var(--paper);box-shadow:none}#gesture-guide{position:fixed;top:0;right:0;bottom:0;left:0;z-index:95;display:flex;align-items:center;justify-content:center;background:color-mix(in srgb,var(--paper) 94%,transparent);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);padding:32px;overflow-y:auto}.gg-content{background:var(--paper);border:1px solid var(--ink);box-shadow:0 12px 40px #0000001f;max-width:780px;width:100%}.gg-header{display:flex;justify-content:space-between;align-items:baseline;padding:22px 28px;border-bottom:1px solid var(--ink-22)}.gg-header h2{font-family:var(--font-mono);font-size:11px;letter-spacing:.22em;text-transform:uppercase;color:var(--ink)}#gesture-guide-close{color:var(--ink-65);font-size:1.3rem;line-height:1}.gg-grid{display:grid;grid-template-columns:1fr 1fr}.gg-item{padding:28px 32px;border-right:1px solid var(--ink-22);border-bottom:1px solid var(--ink-22);position:relative}.gg-item:nth-child(2n){border-right:none}.gg-item:nth-last-child(-n+2){border-bottom:none}.gg-num{font-family:var(--font-mono);font-size:10px;letter-spacing:.18em;color:var(--ink-40);margin-bottom:12px}.gg-label{font-family:var(--font-mono);font-size:10px;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-40);margin-bottom:6px}.gg-item h3{font-family:var(--font-sans);font-weight:500;font-size:1.05rem;margin-bottom:8px;letter-spacing:-.005em;color:var(--ink)}.gg-item p{font-size:.88rem;color:var(--ink-65);line-height:1.55}.gg-footer{padding:14px 28px;border-top:1px solid var(--ink-22);text-align:center;font-family:var(--font-mono);font-size:10px;letter-spacing:.14em;color:var(--ink-40);text-transform:uppercase}@media(max-width:900px){.gg-grid{grid-template-columns:1fr}.gg-item{border-right:none}.gg-item:nth-last-child(-n+2){border-bottom:1px solid var(--ink-22)}.gg-item:last-child{border-bottom:none}}@media(max-width:1000px){#app{grid-template-columns:1fr;grid-template-rows:56px 1fr auto 40px;grid-template-areas:"header" "stage" "sidebar" "footer"}#app[data-left=collapsed] .app-sidebar{opacity:1;pointer-events:auto;padding:revert;border-right:0}.app-sidebar{border-right:none;border-top:1px solid var(--ink-22);padding:20px 0;max-height:320px}.app-stage{padding:0;min-height:50vh}}@media(max-width:640px){#app{padding:10px 12px;grid-template-columns:1fr;grid-template-rows:40px minmax(340px,1fr) auto 28px;grid-template-areas:"header" "stage" "sidebar" "footer";gap:0}.page-border{display:none}#panel{top:0;right:0;bottom:0;left:auto;width:100vw;max-width:100vw;border:none;box-shadow:none}.panel-inner{padding:20px 20px 80px}.panel-header{margin-bottom:20px;padding-bottom:14px}.panel-header h2{font-size:1.25rem;letter-spacing:-.01em}.panel-header button{font-size:1.8rem;width:44px;height:44px;padding:0;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--ink-22);margin-right:-8px}.panel-header button:hover{background:var(--ink-06)}.panel-section{margin-bottom:22px}.panel-section h3{font-size:11px;margin-bottom:12px}#theme-swatches{gap:12px 10px}.theme-swatch-inner{width:40px;height:40px}.theme-swatch-label{font-size:9px}.preset-btn{padding:14px 0;font-size:12px;min-height:48px}.range-btn,.viz-mode-btn,.song-btn{min-height:44px;padding:10px 12px;font-size:12px}.toggle-switch{padding:10px 0;font-size:11px}.toggle-track{width:36px;height:20px}.toggle-thumb{width:16px;height:16px;top:1px;left:1px}.toggle-switch input:checked~.toggle-track .toggle-thumb{transform:translate(16px)}.inline-btn{min-height:44px}.hero-title{font-size:clamp(2.4rem,11vw,4.2rem)}.start-inner{padding:0 8px}.app-header{padding:0 0 8px}.hdr-left{gap:8px;overflow:hidden}.hdr-title{font-size:12px}.hdr-sep{display:none}.hdr-meta{font-size:9px;letter-spacing:.14em}#live-meta-text{display:none}.hdr-meta:after{content:"LIVE";margin-left:6px}.hdr-btn{padding:0;font-size:18px;letter-spacing:0;width:40px;height:40px;display:inline-flex;align-items:center;justify-content:center}.hdr-btn .mb-full{display:none}.hdr-btn .mb-short{display:inline}#toggle-left{display:none}.app-stage{padding:0;min-height:0}.stage-frame{min-height:340px}.app-sidebar{max-height:none;padding:8px 0 6px;gap:8px}.sb-label{margin-bottom:3px;padding-bottom:3px;font-size:9px}.sb-gesture .sb-label{display:none}.sb-gesture{min-height:0}#gesture-indicators{min-height:18px}#note-name{font-size:32px;letter-spacing:-.02em}#note-detail{font-size:10px;margin-top:2px}.sb-vol{display:none}.sb-viz{flex:0 0 auto;min-height:0;align-items:center}#viz-canvas{flex:0 0 auto;aspect-ratio:1 / 1;width:200px;max-width:70vw;height:auto;min-height:0}.stage-vol-rail{right:10px;top:26px;bottom:26px}.app-footer{overflow-x:auto;overflow-y:hidden;padding:0;-webkit-overflow-scrolling:touch;scrollbar-width:none}.app-footer::-webkit-scrollbar{display:none}.foot-stat{padding:0 10px;font-size:9px;gap:5px}.foot-sep{height:10px}.foot-end,.foot-spacer{display:none}.fk,.fv{font-size:9px}#lesson-hud{top:12px;left:12px;right:12px}}.hidden{display:none!important}