.no-note-overlay{position:absolute;inset:0;display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:.25rem;pointer-events:none}.no-note-between{position:relative;margin:-.25rem;border:2px solid rgb(245 158 11/.6);border-radius:.75rem;animation:no-note-between-enter .6s cubic-bezier(.2,.9,.3,1.2) .9s both;transition:border-color .3s ease,background-color .3s ease,box-shadow .3s ease}.no-note-between[data-lit]{border-color:#f59e0b;background:rgb(251 191 36/.1);box-shadow:0 0 18px rgb(251 191 36/.25)}.no-note-tag{position:absolute;top:100%;left:50%;padding:.125rem .5rem;border:1px solid rgb(245 158 11/.6);border-radius:999px;background:var(--card);color:#b45309;font-size:clamp(.6rem,1.1vw,.75rem);font-weight:500;line-height:1.4;white-space:nowrap;transform:translate(-50%,-50%)}.dark .no-note-between{border-color:rgb(252 211 77/.5)}.dark .no-note-between[data-lit]{border-color:#fcd34d}.dark .no-note-tag{border-color:rgb(252 211 77/.5);color:#fcd34d}@media (min-width:640px){.no-note-overlay{gap:.5rem}.no-note-between{margin:-.375rem}}@keyframes no-note-between-enter{0%{opacity:0;transform:scale(1.18)}to{opacity:1;transform:none}}@media (prefers-reduced-motion:reduce){.no-note-between{animation:none;transition:none}}.nl-board{--nl-sky:#38bdf8;--nl-hit:#34d399;--nl-stray:#fbbf24;--nl-miss:#fb7185;--nl-label:8.5rem}@media (max-width:639px){.nl-board{--nl-label:4.75rem}}.nl-tree{display:flex;flex-direction:column;gap:.5rem}.nl-row{display:grid;grid-template-columns:var(--nl-label) minmax(0,1fr);align-items:end;column-gap:.75rem;animation:nl-intro .36s ease-out}.nl-row[data-active]{margin-block:.375rem}.nl-label{display:flex;flex-direction:column;align-items:flex-start;justify-content:center;min-height:2.25rem;padding:.125rem .5rem;border-radius:.5rem;color:var(--muted-foreground);text-align:left;transition:background-color .15s ease,color .15s ease}.nl-label:hover{background:color-mix(in srgb,var(--muted) 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45%,transparent)}.nl-mini-note{position:absolute;inset-block:0;overflow:hidden;padding:.3rem 0 .3rem min(.375rem,20%);border:1px solid var(--border);border-radius:.375rem;background:color-mix(in srgb,var(--muted) 35%,transparent);transition:border-color .15s ease}.nl-divider,.nl-mini-note{display:flex;align-items:center;color:var(--muted-foreground)}.nl-divider{gap:.75rem;margin-top:.75rem;font-size:.8125rem;font-weight:600;animation:nl-intro .36s ease-out}.nl-divider:after,.nl-divider:before{content:"";flex:1;height:1px;background:var(--border)}.nl-watch-pill{display:inline-flex;align-items:center;gap:.3rem;padding:.125rem .5rem;border:1px solid color-mix(in srgb,var(--nl-sky) 45%,transparent);border-radius:999px;color:var(--nl-sky);font-size:.75rem}.nl-watch-row{cursor:default}.nl-watch-row .nl-label:hover{background:none}@media (min-width:640px){.nl-watch-row .nl-name{font-size:.8125rem;white-space:nowrap}}.nl-watch-label{flex-direction:row;align-items:center;justify-content:flex-start;gap:.375rem}.nl-watch-label .nl-glyph{height:2.25rem}.nl-watch-text{display:flex;flex-direction:column;min-width:0}@media (max-width:639px){.nl-watch-label{flex-direction:column;align-items:flex-start;gap:.125rem}.nl-watch-label .nl-glyph{height:1.5rem}}.nl-watch-bar{position:relative;height:2.75rem}.nl-watch-row .nl-mini-note{border-radius:.25rem;border-style:dashed;transition:border-color 80ms ease,background-color 80ms ease}.nl-watch-row .nl-mini-note[data-lit]{border-style:solid;border-color:var(--nl-sky);background:color-mix(in srgb,var(--nl-sky) 30%,var(--card));color:var(--foreground)}.nl-board .nl-watch-row .nl-watch-bar .nl-playhead{left:calc(clamp(0, var(--tbar) - var(--row-start), 4) / 4 * 100%);opacity:0}.nl-board .nl-watch-row[data-playing] .nl-watch-bar .nl-playhead{opacity:1}.nl-active{scroll-margin-block:.75rem}.nl-counts{position:relative;height:1.5rem;margin-bottom:.25rem;font-size:.8125rem;font-variant-numeric:tabular-nums}.nl-counts>span{position:absolute;bottom:0;padding-left:min(.625rem,2.5%);color:color-mix(in srgb,var(--muted-foreground) 55%,transparent);line-height:1.5rem;transition:color .12s ease}.nl-counts>span[data-press]{color:var(--foreground);font-weight:700}.nl-counts>span:not([data-beat]){font-size:.75rem}.nl-counts>span[data-current]{color:var(--nl-sky);font-weight:700}.nl-track{position:relative;display:block;width:100%;height:4.5rem;border:1.5px solid var(--border);border-radius:.875rem;background:color-mix(in srgb,var(--muted) 30%,transparent);cursor:pointer;touch-action:none;user-select:none;transition:transform 90ms ease,background-color .15s ease,border-color .15s ease,box-shadow .15s ease}.nl-track:focus-visible{outline:2px solid var(--ring);outline-offset:2px}.nl-track[data-armed]{border-color:color-mix(in srgb,var(--nl-sky) 70%,transparent);box-shadow:0 0 0 4px color-mix(in srgb,var(--nl-sky) 16%,transparent)}.nl-track[data-pressed]{transform:scale(.995)}.nl-note,.nl-track[data-pressed]{background:color-mix(in srgb,var(--nl-sky) 12%,var(--card))}.nl-note{position:absolute;inset-block:.5rem;display:flex;align-items:center;overflow:hidden;padding:.375rem 0 .375rem min(.5rem,20%);border:1px solid color-mix(in srgb,var(--nl-sky) 40%,transparent);border-radius:.5rem;color:var(--foreground);animation:nl-split .38s ease-out backwards;transition:background-color .12s ease,border-color .12s ease,box-shadow .16s ease}.nl-note>:is(.nl-glyph,.nl-tail){position:relative}.nl-tail{flex:1;height:2px;margin-inline:.375rem .625rem;border-radius:999px;background:currentColor;opacity:.22}.nl-note[data-lit]{border-color:var(--nl-sky);box-shadow:0 0 14px color-mix(in srgb,var(--nl-sky) 45%,transparent)}.nl-note:is([data-state=perfect],[data-state=good]){border-color:var(--nl-hit);background:color-mix(in srgb,var(--nl-hit) 14%,var(--card))}.nl-note:is([data-state=perfect],[data-state=good]):after{content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;animation:nl-hit .65s ease-out forwards}.nl-note[data-state=good]{border-color:color-mix(in srgb,var(--nl-hit) 60%,transparent);background:color-mix(in srgb,var(--nl-hit) 8%,var(--card))}.nl-note[data-state=missed]{border:1px dashed color-mix(in srgb,var(--nl-miss) 75%,transparent);background:color-mix(in srgb,var(--nl-miss) 8%,var(--card))}.nl-fill{position:absolute;inset-block:0}.nl-guide{background:linear-gradient(90deg,color-mix(in srgb,var(--nl-sky) 22%,transparent),color-mix(in srgb,var(--nl-sky) 50%,transparent))}.nl-hold{background:linear-gradient(90deg,color-mix(in srgb,var(--nl-hit) 30%,transparent),color-mix(in srgb,var(--nl-hit) 62%,transparent))}.nl-stray{inset-block:.5rem;border-radius:.375rem;background:color-mix(in srgb,var(--nl-stray) 38%,transparent);box-shadow:inset 0 0 0 1px color-mix(in srgb,var(--nl-stray) 80%,transparent)}.nl-overlay,.nl-stray{position:absolute;pointer-events:none}.nl-overlay{inset:0}.nl-beatline{position:absolute;top:.25rem;bottom:.25rem;width:1px;background:color-mix(in srgb,var(--foreground) 14%,transparent)}.nl-playhead{position:absolute;top:-.375rem;bottom:-.375rem;left:calc(clamp(0, var(--tbar), 4) / 4 * 100%);width:2px;margin-left:-1px;border-radius:2px;background:var(--nl-sky);box-shadow:0 0 10px var(--nl-sky),0 0 2px var(--nl-sky);opacity:0;transition:opacity .2s ease}.nl-board[data-phase] .nl-playhead{opacity:1}.nl-countdown{position:absolute;inset:0;display:grid;place-items:center;border-radius:inherit;background:color-mix(in srgb,var(--card) 78%,transparent)}.nl-count{color:var(--nl-sky);font-size:3rem;font-weight:700;line-height:1;text-shadow:0 0 24px color-mix(in srgb,var(--nl-sky) 55%,transparent);animation:nl-count 1s ease-out forwards}.nl-status-cue{color:var(--nl-sky);font-weight:600}@keyframes nl-hit{0%{background:color-mix(in srgb,var(--nl-hit) 45%,transparent);box-shadow:inset 0 0 0 2px var(--nl-hit),inset 0 0 18px var(--nl-hit)}to{background:transparent;box-shadow:inset 0 0 0 2px transparent,inset 0 0 0 transparent}}@keyframes nl-split{0%{opacity:0;transform:translateY(-6px) scaleX(.92)}to{opacity:1;transform:none}}@keyframes nl-count{0%{opacity:0;transform:scale(1.35)}15%{opacity:1;transform:scale(1)}to{opacity:.8;transform:scale(.94)}}@keyframes nl-intro{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}@media (prefers-reduced-motion:reduce){.nl-count,.nl-note,.nl-note:after,.nl-row{animation:none}.nl-label,.nl-track{transition:none}}[data-introduction-step=timing] .game-piano-wrap,[data-introduction-step=timing] [data-testid=sheet-host]{visibility:hidden}.st-board{--st-sky:#0284c7;--st-hit:#10b981;--st-miss:#e11d48;--st-stray:#d97706;--st-paper:#f7f6f0}.st-step{display:inline-flex;align-items:center;gap:.375rem;padding:.25rem .75rem;border:1px solid var(--border);border-radius:999px;color:var(--muted-foreground);font-size:.8125rem;transition:background-color .15s ease,border-color .15s ease,color .15s ease}.st-step:hover{background:color-mix(in srgb,var(--muted) 55%,transparent)}.st-step:focus-visible{outline:2px solid var(--ring);outline-offset:2px}.st-step[data-current]{border-color:color-mix(in srgb,#38bdf8 60%,transparent);background:color-mix(in srgb,#38bdf8 10%,transparent);color:var(--foreground)}.st-step[data-mastered]{color:#059669}.dark .st-step[data-mastered]{color:#6ee7b7}.st-paper{position:relative;min-height:11rem;overflow:hidden;border:1.5px solid transparent;border-radius:.875rem;background:var(--st-paper);color:#111;cursor:pointer;touch-action:none;user-select:none;transition:border-color .15s ease,box-shadow .15s ease}.st-paper:focus-visible{outline:2px solid var(--ring);outline-offset:2px}.st-paper[data-armed]{border-color:#38bdf8;box-shadow:0 0 0 3px color-mix(in srgb,#38bdf8 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#111;box-sizing:border-box}.st-rest-bar{border:1.5px dashed rgb(17 17 17/.35);border-left:0;border-radius:0 999px 999px 0;background:rgb(17 17 17/.06)}.st-playhead,.st-rest-bar{position:absolute;pointer-events:none}.st-playhead{left:0;width:2px;margin-left:-1px;border-radius:2px;background:#0ea5e9;box-shadow:0 0 10px rgb(14 165 233/.7);opacity:0;transform:translateX(calc(var(--st-x0, 0px) + clamp(0, var(--tbar), var(--st-total, 4)) * var(--st-ppb, 0px)));transition:opacity .2s ease}.st-board[data-running] .st-playhead{opacity:1}.st-divider{position:absolute;top:0;bottom:0;width:2px;margin-left:-1px;background:var(--st-paper)}[data-lit]>.st-bar{border-color:var(--st-sky);box-shadow:0 0 10px rgb(56 189 248/.55)}[data-state=good]>.st-bar,[data-state=perfect]>.st-bar{border-color:var(--st-hit)}[data-state=missed]>.st-bar{border-style:dashed;border-color:var(--st-miss);background:rgb(225 29 72/.06)}.st-ring{position:absolute;border:2px solid transparent;border-radius:999px;opacity:0;pointer-events:none;transform:translate(-50%,-50%)}[data-state=good]>.st-ring,[data-state=perfect]>.st-ring{border-color:var(--st-hit);animation:st-ring .7s ease-out forwards}[data-state=missed]>.st-ring{border-color:var(--st-miss);opacity:.8}.st-stray{width:.5rem;height:.5rem;border-radius:999px;background:var(--st-stray);transform:translate(-50%,-50%)}.st-countdown,.st-stray{position:absolute;pointer-events:none}.st-countdown{inset:0;display:grid;place-items:center;background:color-mix(in srgb,var(--st-paper) 80%,transparent)}.st-count{color:var(--st-sky);font-size:3.5rem;font-weight:700;line-height:1;text-shadow:0 0 18px rgb(56 189 248/.4);animation:st-count 1s ease-out forwards}.st-status-cue{color:#38bdf8;font-weight:600}@keyframes st-ring{0%{opacity:1;transform:translate(-50%,-50%) scale(.7)}60%{opacity:1;transform:translate(-50%,-50%) scale(1.05)}to{opacity:.85;transform:translate(-50%,-50%) scale(1)}}@keyframes st-count{0%{opacity:0;transform:scale(1.35)}15%{opacity:1;transform:scale(1)}to{opacity:.8;transform:scale(.94)}}@media (prefers-reduced-motion:reduce){.st-count,[data-state]>.st-ring{animation:none}[data-state=good]>.st-ring,[data-state=perfect]>.st-ring{opacity:.85}}.piano-keys{--skin-white-bg:#f0f0ec;--skin-white-border:#bbb;--skin-white-ink:#888;--skin-white-ink-strong:#3f3f46;--skin-white-ink-soft:#71717a;--skin-white-art:none;--skin-black-bg:#1c1c1c;--skin-black-border:transparent;--skin-black-border-width:0px;--skin-black-ink:#e4e4e7;--skin-black-ink-soft:#a1a1aa;--skin-black-art:none;--skin-kbd-bg:#fff;--skin-kbd-border:#d4d4d8;--skin-kbd-ink:#3f3f46;--skin-kbd-black-bg:#27272a;--skin-kbd-black-border:#52525b;--skin-kbd-black-ink:#fff;--skin-radius:0.375rem;--skin-font:inherit}.piano-key--white{border:1px solid var(--skin-white-border);border-radius:0 0 var(--skin-radius) var(--skin-radius);background:var(--skin-white-bg);color:var(--skin-white-ink);font-family:var(--skin-font)}.piano-key--black{border:var(--skin-black-border-width) solid var(--skin-black-border);border-top:0;border-radius:0 0 var(--skin-radius) var(--skin-radius);background:var(--skin-black-bg);color:var(--skin-black-ink);font-family:var(--skin-font)}.piano-key--black:before,.piano-key--white:before{position:absolute;inset:0;z-index:0;border-radius:inherit;background:var(--skin-white-art);content:"";pointer-events:none}.piano-key--black:before{background:var(--skin-black-art)}.piano-key--white .piano-key-label--strong{color:var(--skin-white-ink-strong)}.piano-key--white .piano-key-label--soft{color:var(--skin-white-ink-soft)}.piano-key--black .piano-key-label{color:var(--skin-black-ink)}.piano-key--black .piano-key-label--soft{color:var(--skin-black-ink-soft)}.piano-key--white .piano-kbd{border-color:var(--skin-kbd-border);background:var(--skin-kbd-bg);color:var(--skin-kbd-ink)}.piano-key--black .piano-kbd{border-color:var(--skin-kbd-black-border);background:var(--skin-kbd-black-bg);color:var(--skin-kbd-black-ink)}[data-piano-skin=midnight] .piano-key{--skin-white-bg:linear-gradient(180deg,#17191e,#23262d 10%,#20232a 78%,#1a1c22);--skin-white-border:#0c0d10;--skin-white-ink:#8e94a1;--skin-white-ink-strong:#ebe7dc;--skin-white-ink-soft:#9a9fab;--skin-white-art:linear-gradient(180deg,rgb(0 0 0/45%),transparent 9px),linear-gradient(0deg,rgb(235 231 220/10%) 0 2px,transparent 2px),linear-gradient(90deg,rgb(255 255 255/5%) 0 1px,transparent 1px);--skin-black-bg:linear-gradient(180deg,#bfbbb1,#ebe7dc 22%,#dcd8cd 80%,#b3afa5);--skin-black-ink:#1b1d23;--skin-black-ink-soft:#4a4d55;--skin-black-art:linear-gradient(90deg,rgb(255 255 255/0%) 0 20%,rgb(255 255 255/45%) 30%,rgb(255 255 255/0%) 42%),linear-gradient(0deg,#9c988e 0 5px,transparent 5px);--skin-kbd-bg:#2c2f37;--skin-kbd-border:#4a4e58;--skin-kbd-ink:#ebe7dc;--skin-kbd-black-bg:#f4f1e8;--skin-kbd-black-border:#a39f95;--skin-kbd-black-ink:#1b1d23;--pr-key-press:#8e94a1;--skin-press-edge:#ebe7dc}[data-piano-skin=concert] .piano-key{--skin-white-bg:linear-gradient(180deg,#fffdf7,#faf5e8 55%,#efe6d2);--skin-white-border:#c9bc9f;--skin-white-ink:#9a8c6c;--skin-white-art:linear-gradient(180deg,#7d1023 0 4px,#a51c33 4px 5px,rgb(0 0 0/22%) 5px,transparent 13px),linear-gradient(0deg,rgb(120 96 50/18%) 0 3px,transparent 3px),linear-gradient(90deg,rgb(255 255 255/70%) 0 1px,transparent 1px calc(100% - 2px),rgb(140 120 80/18%) calc(100% - 2px));--skin-black-bg:linear-gradient(90deg,#000,#262626 10%,#070707 26%,#000 82%,#191919);--skin-black-art:linear-gradient(90deg,transparent 0 16%,rgb(255 255 255/20%) 24%,rgb(255 255 255/4%) 36%,transparent 40%),linear-gradient(180deg,transparent 0 calc(100% - 22px),rgb(255 255 255/10%) calc(100% - 9px),transparent calc(100% - 7px)),linear-gradient(0deg,#2b2b2b 0 6px,#111 6px 7px,transparent 7px);--skin-kbd-bg:#fffaf0;--skin-kbd-border:#d7c9a8;--skin-kbd-ink:#5b4a2a;--skin-flash-sheen:linear-gradient(180deg,rgb(255 255 255/30%),transparent 45%);--pr-key-press:#60a5fa;--skin-press-edge:#1e40af;--skin-hint-contrast:rgb(60 40 10/55%)}[data-piano-skin=vintage] .piano-key{--skin-white-bg:linear-gradient(180deg,#f1e2bb,#eddcb1 60%,#ddc690);--skin-white-border:#a88d5a;--skin-white-ink:#8c7445;--skin-white-art:linear-gradient(180deg,rgb(64 32 12/45%),transparent 12px),repeating-linear-gradient(90deg,transparent 0 3px,rgb(130 95 40/5%) 3px 4px),radial-gradient(ellipse 60% 18% at calc(30% + var(--key-seed) * 40%) calc(35% + var(--key-seed2) * 40%),rgb(160 120 50/12%),transparent 70%),linear-gradient(0deg,rgb(110 80 30/25%) 0 3px,transparent 3px);--skin-black-bg:linear-gradient(180deg,#4a2516,#3b1c10 55%,#2c140a);--skin-black-art:repeating-linear-gradient(176deg,rgb(255 200 150/8%) 0 2px,transparent 2px 5px,rgb(0 0 0/12%) 5px 6px,transparent 6px 9px),linear-gradient(90deg,rgb(0 0 0/40%),transparent 28%,transparent 70%,rgb(0 0 0/50%)),linear-gradient(180deg,rgb(255 220 180/14%),transparent 30%),linear-gradient(0deg,#1d0c05 0 5px,transparent 5px);--skin-black-ink:#f1dcc0;--skin-kbd-bg:#f7ecd2;--skin-kbd-border:#b99e6b;--skin-kbd-ink:#5a4220;--skin-kbd-black-bg:#2a1209;--skin-kbd-black-border:#6b3b22;--skin-kbd-black-ink:#f1dcc0;--pr-key-press:#8fb4d9;--skin-press-edge:#2f4f72;--skin-hint-contrast:rgb(60 35 10/55%)}[data-piano-skin=sakura] .piano-key{--skin-white-bg:linear-gradient(180deg,#fff7fa,#ffe8ef 65%,#ffd3e0);--skin-white-border:#eeb0c3;--skin-white-ink:#c46a8a;--skin-white-art:radial-gradient(ellipse 4px 2.5px at calc(18% + var(--key-seed) * 60%) calc(22% + var(--key-seed2) * 18%),#ffa8c2 0 70%,transparent 75%),radial-gradient(ellipse 3px 4.5px at calc(70% - var(--key-seed2) * 45%) calc(48% + var(--key-seed) * 16%),#ffbcd0 0 70%,transparent 75%),radial-gradient(ellipse 3.5px 2.5px at calc(30% + var(--key-seed2) * 40%) calc(70% + var(--key-seed) * 12%),#ff9cb9 0 70%,transparent 75%),linear-gradient(180deg,rgb(150 40 80/18%),transparent 10px);--skin-black-bg:linear-gradient(180deg,#62304a,#46203a 65%,#331529);--skin-black-art:linear-gradient(90deg,transparent 15%,rgb(255 210 225/18%) 25%,transparent 38%);--skin-black-ink:#ffd6e3;--skin-kbd-bg:#fff;--skin-kbd-border:#f2bccd;--skin-kbd-ink:#9d3d62;--skin-kbd-black-bg:#3a1830;--skin-kbd-black-border:#7a3b5f;--skin-kbd-black-ink:#ffe4ec;--skin-flash-sheen:linear-gradient(180deg,rgb(255 255 255/22%),transparent 50%);--pr-key-press:#e879f9;--skin-press-edge:#a21caf;--skin-hint-contrast:rgb(90 20 50/50%)}[data-piano-skin=candy] .piano-key{--candy-h:calc(var(--key-i) * 47deg + 300deg);--skin-white-border:#d9c3e6;--skin-white-art:linear-gradient(90deg,transparent 14%,rgb(255 255 255/60%) 14% 26%,transparent 26%),radial-gradient(circle at calc(30% + var(--key-seed) * 40%) 62%,rgb(255 255 255/85%) 0 1.4px,transparent 1.8px),radial-gradient(circle at calc(65% - var(--key-seed2) * 30%) 74%,rgb(255 255 255/85%) 0 1.4px,transparent 1.8px),linear-gradient(0deg,rgb(0 0 0/8%) 0 4px,transparent 4px);--skin-black-bg:linear-gradient(180deg,#7a4a33,#5a321f 60%,#432415);--skin-black-art:radial-gradient(ellipse 1.3px 3px at 30% calc(30% + var(--key-seed) * 20%),#ff9ad5 0 80%,transparent 90%),radial-gradient(ellipse 3px 1.3px at 66% calc(42% + var(--key-seed2) * 15%),#8fe9ff 0 80%,transparent 90%),radial-gradient(ellipse 1.3px 3px at 44% calc(62% + var(--key-seed) * 10%),#fff38f 0 80%,transparent 90%),radial-gradient(ellipse 3px 1.3px at 58% calc(76% - var(--key-seed2) * 8%),#c8a6ff 0 80%,transparent 90%),linear-gradient(90deg,transparent 18%,rgb(255 230 210/22%) 26%,transparent 38%),linear-gradient(0deg,#2f170c 0 5px,transparent 5px);--skin-black-ink:#ffe9d6;--skin-kbd-bg:#fff;--skin-kbd-border:#e3cbea;--skin-kbd-ink:#6b3f7a;--skin-kbd-black-bg:#3a1d10;--skin-kbd-black-border:#8a5a40;--skin-kbd-black-ink:#ffe9d6;--skin-flash-sheen:linear-gradient(90deg,transparent 14%,rgb(255 255 255/35%) 14% 26%,transparent 26%);--pr-key-press:#c084fc;--skin-press-edge:#7e22ce;--skin-radius:0.6rem;--skin-hint-contrast:rgb(70 20 90/45%)}[data-piano-skin=candy] .piano-key--white{background:linear-gradient(180deg,hsl(var(--candy-h) 100% 95%) 0,hsl(var(--candy-h) 92% 87%) 70%,hsl(var(--candy-h) 80% 80%) 100%);color:hsl(var(--candy-h) 45% 40%)}[data-piano-skin=ocean] .piano-key{--skin-white-bg:linear-gradient(180deg,#e9fffc,#c2f3ec 55%,#93e0d6);--skin-white-border:#5fb3aa;--skin-white-ink:#2c7a72;--skin-white-art:radial-gradient(ellipse 90% 30% at 35% 14%,rgb(255 255 255/70%),transparent 70%),radial-gradient(circle at calc(30% + var(--key-seed) * 40%) calc(55% + var(--key-seed2) * 20%),transparent 0 2px,rgb(255 255 255/75%) 2.2px 3px,transparent 3.4px),radial-gradient(circle at calc(60% - var(--key-seed2) * 30%) calc(72% + var(--key-seed) * 12%),transparent 0 1.2px,rgb(255 255 255/70%) 1.4px 2px,transparent 2.4px),radial-gradient(ellipse 140% 10px at 50% 100%,rgb(13 110 130/30%),transparent 80%),linear-gradient(180deg,rgb(3 50 70/25%),transparent 10px);--skin-black-bg:linear-gradient(180deg,#0d3157,#071d39 55%,#020b1c);--skin-black-art:linear-gradient(90deg,rgb(120 220 255/0%) 15%,rgb(120 220 255/16%) 25%,rgb(120 220 255/0%) 36%),linear-gradient(0deg,#01060f 0 5px,transparent 5px);--skin-black-ink:#b5fff4;--skin-kbd-bg:#f2fffd;--skin-kbd-border:#84cfc6;--skin-kbd-ink:#155e57;--skin-kbd-black-bg:#061a33;--skin-kbd-black-border:#1f5f86;--skin-kbd-black-ink:#b5fff4;--skin-flash-sheen:radial-gradient(ellipse 90% 30% at 35% 14%,rgb(255 255 255/40%),transparent 70%);--pr-key-press:#22d3ee;--skin-press-edge:#0e7490;--skin-hint-contrast:rgb(5 50 60/50%)}[data-piano-skin=glacier] .piano-key{--skin-white-bg:linear-gradient(180deg,#f7fcff,#e2f2fc 55%,#c6e3f6);--skin-white-border:#98c4e2;--skin-white-ink:#4a83aa;--skin-white-art:linear-gradient(135deg,rgb(255 255 255/85%) 0 14%,transparent 14% 38%,rgb(255 255 255/45%) 38% 41%,transparent 41%),linear-gradient(calc(200deg + var(--key-seed) * 40deg),transparent 0 58%,rgb(150 205 240/45%) 58% 60%,transparent 60%),linear-gradient(calc(20deg + var(--key-seed2) * 30deg),transparent 0 72%,rgb(255 255 255/70%) 72% 73.5%,transparent 73.5%),linear-gradient(180deg,rgb(30 80 120/18%),transparent 10px);--skin-black-bg:linear-gradient(180deg,#2a5b82,#18405f 55%,#0c2740);--skin-black-art:linear-gradient(120deg,rgb(255 255 255/30%) 0 22%,transparent 22% 55%,rgb(190 230 255/16%) 55% 60%,transparent 60%),linear-gradient(0deg,#08192a 0 5px,rgb(160 215 255/35%) 5px 6px,transparent 6px);--skin-black-ink:#d6efff;--skin-kbd-bg:#fbfeff;--skin-kbd-border:#b3d6ee;--skin-kbd-ink:#2a6188;--skin-kbd-black-bg:#0f2d47;--skin-kbd-black-border:#3c7aa6;--skin-kbd-black-ink:#e6f5ff;--skin-flash-sheen:linear-gradient(135deg,rgb(255 255 255/45%) 0 14%,transparent 14%);--pr-key-press:#93c5fd;--skin-press-edge:#1d4ed8;--skin-hint-contrast:rgb(10 40 70/50%)}[data-piano-skin=neon] .piano-key{--skin-white-bg:linear-gradient(180deg,#1c0b33,#140726 65%,#0c0419);--skin-white-border:#3a1260;--skin-white-ink:#ff9cf0;--skin-white-ink-strong:#ffd6f7;--skin-white-ink-soft:#ff9cf0;--skin-white-art:linear-gradient(0deg,#ff4fd8 0 2px,rgb(255 79 216/40%) 2px 5px,rgb(255 79 216/0%) 16px),linear-gradient(90deg,rgb(255 79 216/60%) 0 1px,rgb(255 79 216/0%) 5px calc(100% - 5px),rgb(255 79 216/60%) calc(100% - 1px)),repeating-linear-gradient(0deg,rgb(34 228 255/22%) 0 1px,transparent 1px 8px) bottom /100% 38% no-repeat,linear-gradient(180deg,rgb(0 0 0/50%),transparent 10px);--skin-black-bg:linear-gradient(180deg,#06020f,#030008);--skin-black-border:#22e4ff;--skin-black-border-width:1px;--skin-black-art:linear-gradient(0deg,#22e4ff 0 2px,rgb(34 228 255/40%) 2px 5px,rgb(34 228 255/0%) 13px),linear-gradient(90deg,rgb(34 228 255/0%) 20%,rgb(34 228 255/14%) 30%,rgb(34 228 255/0%) 42%);--skin-black-ink:#9ff4ff;--skin-black-ink-soft:#5fd6e8;--skin-kbd-bg:#2a0d45;--skin-kbd-border:#ff4fd8;--skin-kbd-ink:#ffd6f7;--skin-kbd-black-bg:#021a24;--skin-kbd-black-border:#22e4ff;--skin-kbd-black-ink:#c7fbff;--skin-flash-sheen:linear-gradient(0deg,rgb(255 255 255/45%) 0 2px,transparent 2px);--pr-key-press:#8b5cf6;--skin-press-edge:#e9d5ff}[data-piano-skin=arcade] .piano-key{--skin-radius:0px;--skin-font:ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;--skin-white-bg:#f2f0e6;--skin-white-border:#15121f;--skin-white-ink:#3d3a52;--skin-white-art:linear-gradient(0deg,#8f8ba3 0 4px,#c9c5d6 4px 8px,transparent 8px),linear-gradient(90deg,#ffffff 0 3px,transparent 3px calc(100% - 3px),#bdb8cc calc(100% - 3px)),linear-gradient(180deg,#ffffff 0 3px,transparent 3px),repeating-linear-gradient(0deg,transparent 0 3px,rgb(21 18 31/4%) 3px 4px);--skin-black-bg:#3b2a8f;--skin-black-border:#15121f;--skin-black-border-width:2px;--skin-black-art:linear-gradient(180deg,#6d5bd6 0 3px,transparent 3px),linear-gradient(90deg,#6d5bd6 0 3px,transparent 3px calc(100% - 3px),#241866 calc(100% - 3px)),linear-gradient(0deg,#1a1050 0 5px,transparent 5px),linear-gradient(90deg,transparent 0 3px,#9a8cff 3px 6px,transparent 6px) 0 6px /100% 3px no-repeat;--skin-black-ink:#e3dcff;--skin-kbd-bg:#fff;--skin-kbd-border:#15121f;--skin-kbd-ink:#15121f;--skin-kbd-black-bg:#15121f;--skin-kbd-black-border:#9a8cff;--skin-kbd-black-ink:#fff;--skin-flash-sheen:linear-gradient(180deg,rgb(255 255 255/45%) 0 3px,transparent 3px),linear-gradient(0deg,rgb(0 0 0/22%) 0 4px,transparent 4px);--pr-key-press:#60a5fa;--skin-press-edge:#1d4ed8;--skin-hint-contrast:#15121f}[data-piano-skin=arcade] .piano-kbd{border-radius:0}[data-piano-skin=arcade] .piano-key--white{border-width:0 1px 2px}[data-piano-skin=aurora] .piano-key{--aurora-h:calc(185deg + var(--key-pos) * 150deg);--skin-white-border:rgb(60 60 110/45%);--skin-white-art:radial-gradient(ellipse 160% 45% at 50% 0,rgb(255 255 255/75%),transparent 70%),linear-gradient(0deg,rgb(20 10 60/18%) 0 3px,transparent 3px);--skin-black-bg:linear-gradient(180deg,#0d1230,#070a1f 60%,#03040f);--skin-black-art:linear-gradient(0deg,hsl(var(--aurora-h) 95% 65%) 0 3px,hsl(var(--aurora-h) 95% 60%/45%) 3px 7px,hsl(var(--aurora-h) 95% 60%/0%) 18px),linear-gradient(90deg,transparent 18%,rgb(255 255 255/12%) 28%,transparent 40%);--skin-black-ink:#e6e9ff;--skin-kbd-bg:rgb(255 255 255/85%);--skin-kbd-border:rgb(60 60 110/35%);--skin-kbd-ink:#2a2a5a;--skin-kbd-black-bg:#0d1230;--skin-kbd-black-border:#4b4f8f;--skin-kbd-black-ink:#fff;--skin-flash-sheen:radial-gradient(ellipse 160% 45% at 50% 0,rgb(255 255 255/45%),transparent 70%);--pr-key-press:#f8fafc;--skin-press-edge:#6366f1;--skin-hint-contrast:rgb(20 10 60/50%)}[data-piano-skin=aurora] .piano-key--white{background:linear-gradient(180deg,hsl(var(--aurora-h) 90% 93%) 0,hsl(var(--aurora-h) 85% 82%) 60%,hsl(var(--aurora-h) 75% 70%) 100%);color:hsl(var(--aurora-h) 50% 32%)}[data-piano-skin=magma] .piano-key{--skin-white-bg:linear-gradient(180deg,#3d3636,#2d2727 60%,#201b1b);--skin-white-border:#100c0c;--skin-white-ink:#ffb07a;--skin-white-ink-strong:#ffd9bd;--skin-white-ink-soft:#f59a5c;--skin-white-art:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='300' viewBox='0 0 120 300'%3E%3Cg fill='none' stroke-linecap='round' stroke-linejoin='round'%3E%3Cg stroke='%23ff5a1f' stroke-opacity='.35' stroke-width='5'%3E%3Cpath d='M8 12l14 22-5 18 16 26-7 20 12 24-9 30 15 22'/%3E%3Cpath d='M33 78l22 8 10 19 24 6'/%3E%3Cpath d='M74 150l-14 20 6 24-18 16 4 26-12 30'/%3E%3Cpath d='M60 170l26 10 8 22 22 10'/%3E%3Cpath d='M98 30l-10 20 8 16-12 22 6 18'/%3E%3Cpath d='M48 196l-22-4-12 18'/%3E%3C/g%3E%3Cg stroke='%23ff8a2a' stroke-width='1.8'%3E%3Cpath d='M8 12l14 22-5 18 16 26-7 20 12 24-9 30 15 22'/%3E%3Cpath d='M33 78l22 8 10 19 24 6'/%3E%3Cpath d='M74 150l-14 20 6 24-18 16 4 26-12 30'/%3E%3Cpath d='M60 170l26 10 8 22 22 10'/%3E%3Cpath d='M98 30l-10 20 8 16-12 22 6 18'/%3E%3Cpath d='M48 196l-22-4-12 18'/%3E%3C/g%3E%3Cg stroke='%23ffe0a0' stroke-width='.7'%3E%3Cpath d='M8 12l14 22-5 18 16 26-7 20 12 24-9 30 15 22'/%3E%3Cpath d='M74 150l-14 20 6 24-18 16 4 26-12 30'/%3E%3Cpath d='M98 30l-10 20 8 16-12 22 6 18'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E") calc(var(--key-seed) * 100%) calc(var(--key-seed2) * 100%) /240% auto repeat-y,radial-gradient(ellipse 120% 26px at 50% 100%,rgb(255 90 20/50%),transparent 75%),radial-gradient(circle at calc(20% + var(--key-seed2) * 60%) calc(30% + var(--key-seed) * 25%),rgb(255 255 255/6%) 0 1px,transparent 1.5px),linear-gradient(180deg,rgb(0 0 0/50%),transparent 10px);--skin-black-bg:linear-gradient(90deg,#050303,#1c1414 14%,#070404 34%,#000 85%,#140d0d);--skin-black-art:linear-gradient(90deg,transparent 0 16%,rgb(255 200 170/14%) 24%,transparent 38%),linear-gradient(0deg,#ff5a1f 0 2px,rgb(255 90 31/40%) 2px 6px,transparent 14px);--skin-black-ink:#ffc59a;--skin-kbd-bg:#1d1717;--skin-kbd-border:#ff7a2a;--skin-kbd-ink:#ffd9bd;--skin-kbd-black-bg:#000;--skin-kbd-black-border:#ff5a1f;--skin-kbd-black-ink:#ffd9bd;--skin-flash-sheen:linear-gradient(180deg,rgb(255 255 255/22%),transparent 40%);--pr-key-press:#7dd3fc;--skin-press-edge:#0369a1}[data-piano-skin=galaxy] .piano-key{--skin-white-bg:radial-gradient(ellipse 140% 55% at calc(var(--key-seed) * 100%) 32%,rgb(168 85 247/70%),transparent 70%),radial-gradient(ellipse 130% 45% at calc(100% - var(--key-seed2) * 100%) 82%,rgb(59 130 246/60%),transparent 70%),linear-gradient(180deg,#24164f 0,#1b1140 100%);--skin-white-border:#0d0826;--skin-white-ink:#d8ccff;--skin-white-ink-strong:#f1ecff;--skin-white-ink-soft:#b9a8ff;--skin-white-art:radial-gradient(circle at calc(20% + var(--key-seed) * 60%) calc(12% + var(--key-seed2) * 20%),#fff 0 1px,transparent 1.6px),radial-gradient(circle at calc(75% - var(--key-seed2) * 50%) calc(38% + var(--key-seed) * 14%),#fff 0 0.8px,transparent 1.3px),radial-gradient(circle at calc(35% + var(--key-seed2) * 40%) calc(58% + var(--key-seed) * 10%),#e0d4ff 0 1.3px,rgb(224 212 255/30%) 2px,transparent 3.5px),radial-gradient(circle at calc(60% - var(--key-seed) * 35%) calc(76% + var(--key-seed2) * 10%),#fff 0 0.8px,transparent 1.3px),radial-gradient(circle at calc(15% + var(--key-seed) * 25%) calc(88% - var(--key-seed2) * 6%),#bfdbfe 0 0.9px,transparent 1.4px),linear-gradient(180deg,rgb(0 0 0/45%),transparent 10px);--skin-black-bg:linear-gradient(180deg,#07041a,#030110);--skin-black-border:#5b3fb8;--skin-black-border-width:1px;--skin-black-art:radial-gradient(circle at calc(30% + var(--key-seed) * 40%) calc(30% + var(--key-seed2) * 30%),#fff 0 0.7px,transparent 1.2px),radial-gradient(circle at calc(65% - var(--key-seed2) * 30%) calc(62% + var(--key-seed) * 15%),#c4b5fd 0 0.8px,transparent 1.3px),linear-gradient(0deg,rgb(139 92 246/55%) 0 2px,transparent 10px);--skin-black-ink:#ddd3ff;--skin-kbd-bg:#160d38;--skin-kbd-border:#7c5cff;--skin-kbd-ink:#ece6ff;--skin-kbd-black-bg:#05031a;--skin-kbd-black-border:#7c5cff;--skin-kbd-black-ink:#fff;--skin-flash-sheen:radial-gradient(circle at 50% 30%,rgb(255 255 255/35%),transparent 60%);--pr-key-press:#c4b5fd;--skin-press-edge:#7c3aed}[data-piano-skin=gold] .piano-key{--skin-white-bg:linear-gradient(180deg,#fff4b8,#f3cf62 16%,#ddb03a 42%,#f8dd80 60%,#d9a52c 82%,#b9851a);--skin-white-border:#7d5a0e;--skin-white-ink:#6a4806;--skin-white-art:linear-gradient(104deg,transparent 0 32%,rgb(255 255 255/60%) 40%,rgb(255 255 255/0%) 48%),linear-gradient(180deg,rgb(70 45 0/40%) 0 2px,rgb(255 245 200/70%) 2px 3px,transparent 3px),linear-gradient(0deg,rgb(90 60 5/45%) 0 3px,rgb(255 236 160/60%) 3px 4px,transparent 4px),linear-gradient(90deg,rgb(255 250 220/70%) 0 1px,transparent 1px calc(100% - 1px),rgb(110 75 10/40%) calc(100% - 1px));--skin-black-bg:linear-gradient(90deg,#000,#232323 12%,#050505 30%,#000 84%,#1a1a1a);--skin-black-border:#d4a72c;--skin-black-border-width:1px;--skin-black-art:linear-gradient(90deg,transparent 0 16%,rgb(255 240 200/22%) 24%,rgb(255 240 200/4%) 36%,transparent 40%),linear-gradient(0deg,#e9c157 0 2px,#6a4806 2px 3px,#151515 3px 7px,transparent 7px);--skin-black-ink:#f6d77a;--skin-kbd-bg:#fff8dc;--skin-kbd-border:#a77a16;--skin-kbd-ink:#5a3d04;--skin-kbd-black-bg:#111;--skin-kbd-black-border:#d4a72c;--skin-kbd-black-ink:#f6d77a;--skin-flash-sheen:linear-gradient(104deg,transparent 0 32%,rgb(255 255 255/45%) 40%,rgb(255 255 255/0%) 48%);--pr-key-press:#3b82f6;--skin-press-edge:#1e3a8a;--skin-hint-contrast:rgb(40 25 0/70%)}.introduction-screener-backdrop{position:fixed;inset:0;z-index:40;display:flex;align-items:flex-start;justify-content:center;padding-top:clamp(32px,10vh,112px);background:var(--background)}.introduction-completion{background:radial-gradient(ellipse at 50% 0,#20314566,transparent 60%),var(--background)}.game-tour{width:100%;min-height:100dvh;padding:0 20px 20px;background:var(--background)}.tour-topbar{justify-content:space-between;gap:20px;min-height:68px;border-bottom:1px solid var(--border)}.tour-topbar,.tour-wordmark{display:flex;align-items:center}.tour-wordmark{gap:12px;flex-shrink:0}.tour-demo-label{padding:4px 7px;border:1px solid var(--border);border-radius:5px;color:var(--muted-foreground);font-size:10px;font-weight:500;line-height:1;letter-spacing:.08em;text-transform:uppercase}.tour-chapters{display:flex;align-items:center;justify-content:center;gap:6px}.tour-chapters button{display:flex;align-items:center;gap:7px;min-height:38px;padding:7px 12px;border-radius:7px;font-size:12px;color:var(--muted-foreground);cursor:pointer}.tour-chapters button[aria-current]{color:#d5edff;background:#7ec8ff16}.tour-chapter-number{display:grid;place-items:center;width:19px;height:19px;border:1px solid;border-radius:50%;font-size:10px;opacity:.8}.tour-experience{display:grid;grid-template-columns:minmax(0,1fr) 300px;grid-template-rows:minmax(0,1fr);gap:28px;padding-top:20px;min-height:0;flex:1}.tour-guide{grid-column:2;grid-row:1;min-width:0;padding:20px 0 0 24px;border-left:1px solid var(--border)}.tour-guide,.tour-guide-body{display:flex;flex-direction:column;min-height:0}.tour-guide-body{gap:24px;overflow-y:auto;padding:3px 4px 20px;margin-inline:-4px}.tour-guide-intro{display:flex;flex-direction:column;gap:16px}.tour-help-options{display:flex;flex-direction:column;gap:4px;padding-top:8px}.tour-eyebrow{display:flex;align-items:center;gap:8px;font-size:11px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:#aac7de}.tour-step-count{margin-left:auto;font-weight:400;font-variant-numeric:tabular-nums;color:var(--muted-foreground)}.tour-heading h1{font-size:27px;line-height:1.2;font-weight:600;letter-spacing:-.035em;margin:16px 0 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