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28px;display:flex;position:relative}.round-button{border-radius:50%;width:42px;height:42px}.preview-button{color:#100913;background:var(--voice-purple);border-color:var(--voice-purple);border-radius:23px;height:44px;padding:0 24px;font-size:12px;font-weight:650}.preview-button:hover{box-shadow:0 0 30px var(--voice-purple)}@supports (color:color-mix(in lab, red, red)){.preview-button:hover{box-shadow:0 0 30px color-mix(in srgb, var(--voice-purple) 24%, transparent)}}.preview-button:hover{transform:translateY(-1px)}.preview-button span{margin-right:5px;font-size:9px}.sequence-reset{border:1px solid var(--line);color:#65736f;cursor:pointer;background:0 0;border-radius:21px;min-height:40px;padding:0 15px;font-size:10px}.sequence-reset:hover{color:var(--ink);border-color:#79f5d64d}.light-legend{color:#64726f;gap:18px;font-size:10px;display:flex;position:absolute;right:0}.light-legend span{align-items:center;gap:7px;display:flex}.light-legend i{border-radius:50%;width:7px;height:7px}.current-light{background:var(--voice-purple);box-shadow:0 0 8px var(--voice-purple)}.next-light{background:#67518c}.keyboard-scroll{width:100%;max-width:100%;overflow:visible}.keyboard{background:#060809;border:1px solid #1a2021;width:100%;height:170px;padding:0 5px 6px;position:relative;box-shadow:0 16px 44px #00000047}.white-keys{gap:2px;height:100%;display:flex}.piano-key{cursor:pointer;touch-action:none;-webkit-user-select:none;user-select:none;-webkit-touch-callout:none;border:0;padding:0;transition:background .12s,box-shadow .12s,transform 80ms}.piano-key.white{background:linear-gradient(#dce3e0,#aab3b0);border-radius:0 0 3px 3px;flex:1;height:100%;position:relative}.piano-key.white:after{content:"";pointer-events:none;background:linear-gradient(#fff6,#0000 45%);position:absolute;inset:0}.piano-key.white span{color:#53605e;font:600 8px var(--font-geist-mono);position:absolute;bottom:11px;left:50%;transform:translate(-50%)}.piano-key.black{z-index:3;background:linear-gradient(90deg,#090b0c,#1e2425 50%,#07090a);border-radius:0 0 3px 3px;width:2.75%;height:60%;position:absolute;top:0;transform:translate(-50%);box-shadow:0 5px 8px #00000080}.piano-key.current{box-shadow:0 0 20px var(--voice-purple), inset 0 -10px 20px #ffffff1f;background:linear-gradient(#dba8e2,#a653b1)}@supports (color:color-mix(in lab, red, red)){.piano-key.current{box-shadow:0 0 20px color-mix(in srgb, var(--voice-purple) 58%, transparent), inset 0 -10px 20px #ffffff1f}}.piano-key.black.current{background:linear-gradient(#ca78d5,#713879)}.piano-key.single-current,.piano-key.melody-current{box-shadow:0 0 20px var(--voice-blue), inset 0 -10px 20px #ffffff24;background:linear-gradient(#b9e2f8,#5aa5d8)}@supports (color:color-mix(in lab, red, red)){.piano-key.single-current,.piano-key.melody-current{box-shadow:0 0 20px color-mix(in srgb, var(--voice-blue) 62%, transparent), inset 0 -10px 20px #ffffff24}}.piano-key.black.single-current,.piano-key.black.melody-current{background:linear-gradient(#8bc9ee,#3f7398)}.piano-key.dyad-current{box-shadow:0 0 20px var(--voice-orange), inset 0 -10px 20px #ffffff24;background:linear-gradient(#ffc1a7,#df7041)}@supports (color:color-mix(in lab, red, red)){.piano-key.dyad-current{box-shadow:0 0 20px color-mix(in srgb, var(--voice-orange) 62%, transparent), inset 0 -10px 20px #ffffff24}}.piano-key.black.dyad-current{background:linear-gradient(#f79b74,#98492c)}.piano-key.matched{box-shadow:0 0 12px var(--voice-purple), inset 0 -12px 22px #1703193d}@supports (color:color-mix(in lab, red, red)){.piano-key.matched{box-shadow:0 0 12px color-mix(in srgb, var(--voice-purple) 34%, transparent), inset 0 -12px 22px #1703193d}}.piano-key.pressed{background:linear-gradient(#fff4b5,#e6b968);box-shadow:0 0 25px #ffd66b9e,inset 0 -8px 18px #ffffff2e}.piano-key.black.pressed{background:linear-gradient(#ffdd7d,#9d6f29)}.piano-key:active{transform:translateY(2px)}.piano-key.black:active{transform:translate(-50%,2px)}.melody-lab{border-top:1px solid var(--line);margin-top:70px;padding-top:64px}.melody-heading{grid-template-columns:minmax(260px,.8fr) minmax(280px,1fr);align-items:end;gap:44px;display:grid}.melody-heading .eyebrow{color:var(--voice-blue);margin-bottom:10px}.melody-heading>p{color:#7d8c89;max-width:600px;margin:0;font-size:12px;line-height:1.8}.melody-picker{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:28px;display:grid}.melody-picker button{text-align:left;color:#81908d;cursor:pointer;background:#0d1112;border:1px solid #b2d7cf1a;grid-template-columns:34px 1fr auto;align-items:center;gap:12px;min-height:84px;padding:18px 20px;transition:all .22s;display:grid}.melody-picker button:hover,.melody-picker button.selected{border-color:var(--voice-blue)}@supports (color:color-mix(in lab, red, red)){.melody-picker button:hover,.melody-picker button.selected{border-color:color-mix(in srgb, var(--voice-blue) 48%, transparent)}}.melody-picker button:hover,.melody-picker button.selected{background:var(--voice-blue)}@supports (color:color-mix(in lab, red, red)){.melody-picker button:hover,.melody-picker button.selected{background:color-mix(in srgb, var(--voice-blue) 7%, #0d1112)}}.melody-picker button>span{color:#061017;background:var(--voice-blue);border-radius:50%;place-items:center;width:34px;height:34px;font-size:18px;display:grid}.melody-picker strong{color:#cad7d4;font-size:15px;font-weight:560}.melody-picker small{color:#5e6c69;font:500 8px var(--font-geist-mono);letter-spacing:.1em}.melody-trail{background:#070a0bb8;border:1px solid #b2d7cf1a;margin-top:12px;padding:22px}.melody-trail.active{border-color:var(--voice-blue)}@supports (color:color-mix(in lab, red, red)){.melody-trail.active{border-color:color-mix(in srgb, var(--voice-blue) 36%, transparent)}}.melody-trail.active{box-shadow:inset 2px 0 0 var(--voice-blue)}.melody-trail.complete{border-color:var(--voice-purple)}@supports (color:color-mix(in lab, red, red)){.melody-trail.complete{border-color:color-mix(in srgb, var(--voice-purple) 42%, transparent)}}.melody-trail.complete{box-shadow:inset 2px 0 0 var(--voice-purple)}.melody-progress-head{color:#8d9b98;justify-content:space-between;gap:20px;font-size:11px;display:flex}.melody-progress-head strong{color:var(--voice-blue);font:600 9px var(--font-geist-mono);letter-spacing:.08em;text-transform:uppercase}.melody-trail.complete .melody-progress-head strong{color:var(--voice-purple)}.melody-notes{scrollbar-color:#283331 transparent;gap:7px;margin:18px 0 0;padding:0 0 10px;list-style:none;display:flex;overflow-x:auto}.melody-notes li{color:#596663;min-width:48px;height:42px;font:600 10px var(--font-geist-mono);background:#090c0d;border:1px solid #b2d7cf17;flex:none;place-items:center;transition:all .18s;display:grid;position:relative}.melody-notes li span{color:#303b39;font-size:6px;position:absolute;top:3px;left:4px}.melody-notes li.passed{color:#71807c;border-color:#b2d7cf24}.melody-notes li.current{color:#071014;border-color:var(--voice-blue);background:var(--voice-blue);box-shadow:0 0 18px var(--voice-blue)}@supports (color:color-mix(in lab, red, red)){.melody-notes li.current{box-shadow:0 0 18px color-mix(in srgb, var(--voice-blue) 30%, transparent)}}.melody-notes li.current span{color:#07101480}.melody-notes li.hit{background:#fff;transform:translateY(-2px)}.melody-actions{justify-content:space-between;align-items:center;gap:20px;margin-top:11px;display:flex}.melody-actions p{color:#64726f;margin:0;font-size:10px}.melody-actions>div{gap:8px;display:flex}.melody-actions button{border:1px solid var(--line);color:#71807c;cursor:pointer;background:0 0;border-radius:18px;min-height:34px;padding:0 12px;font-size:9px}.melody-actions button:hover{color:var(--ink);border-color:var(--voice-blue)}@supports (color:color-mix(in lab, red, red)){.melody-actions button:hover{border-color:color-mix(in srgb, var(--voice-blue) 42%, transparent)}}footer{min-height:78px;padding:24px max(clamp(22px, 5vw, 88px), calc(env(safe-area-inset-right,0px) + 16px)) max(24px, env(safe-area-inset-bottom,0px)) max(clamp(22px, 5vw, 88px), calc(env(safe-area-inset-left,0px) + 16px));border-top:1px solid var(--line);color:#4f5b59;font:500 9px var(--font-geist-mono);letter-spacing:.08em;justify-content:space-between;align-items:center;gap:20px;display:flex}footer a{text-underline-offset:3px}@media (max-width:1180px){.stage{grid-template-columns:minmax(236px,.7fr) minmax(450px,1.35fr);gap:clamp(22px,3vw,40px);padding-top:44px;padding-bottom:58px}h1{font-size:clamp(46px,5.3vw,64px)}.visual-field{min-height:430px}.polyphony-demos button{padding:12px 10px}}@media (max-width:980px){.stage{grid-template-columns:minmax(0,1fr)}.stage-copy{max-width:620px;padding-left:0}.visual-field{min-height:clamp(500px,68vw,610px)}.stage:before{display:none}.physics-heading{flex-direction:column;align-items:start}.chord-row{grid-template-columns:repeat(2,minmax(0,1fr))}.polyphony-step-row{grid-template-columns:repeat(4,minmax(0,1fr))}}@media (max-width:720px){.topbar{min-height:calc(66px + env(safe-area-inset-top,0px));padding-right:max(16px, calc(env(safe-area-inset-right,0px) + 12px));padding-left:max(16px, calc(env(safe-area-inset-left,0px) + 12px))}.brand span:last-child,.live-dot{display:none}.language-toggle{border-radius:21px;height:40px}.language-toggle button{min-width:34px;height:32px}.icon-button,.connect-button{min-width:44px;min-height:44px}.connect-button{padding:0 13px;font-size:11px}.stage{min-height:auto;padding-top:40px;padding-right:max(18px, calc(env(safe-area-inset-right,0px) + 12px));padding-bottom:52px;padding-left:max(18px, calc(env(safe-area-inset-left,0px) + 12px))}h1{font-size:48px}.intro{margin-top:24px;line-height:1.75}.visual-field{aspect-ratio:.9;min-height:clamp(420px,118vw,520px)}.field-caption,.resonance-control{display:none}.frequency-card{bottom:28px;left:22px}.frequency-data{margin-left:16px;padding-left:14px}.frequency-data small{max-width:min(52vw,260px)}.field-topline{left:22px;right:22px}.modal-readout{top:55px;left:22px;right:22px}.modal-readout>span{font-size:7px}.physics-panel,.guide-panel{padding-right:max(18px, calc(env(safe-area-inset-right,0px) + 12px));padding-left:max(18px, calc(env(safe-area-inset-left,0px) + 12px))}.physics-grid{grid-template-columns:1fr}.physics-grid article{min-height:auto;padding:24px 22px}.model-badge{white-space:normal}.chord-row{grid-template-columns:1fr 1fr}.light-legend{justify-content:center;width:100%;margin-top:8px;position:static}.transport-row{flex-wrap:wrap}.keyboard-scroll{overscroll-behavior-x:contain;scrollbar-color:#2a3432 transparent;-webkit-overflow-scrolling:touch;padding-bottom:8px;overflow:auto hidden}.keyboard{min-width:760px;height:136px}.guide-heading{flex-direction:column;align-items:start;gap:18px}.polyphony-step-row{padding-bottom:8px;display:flex;overflow-x:auto}.polyphony-step-row>div{flex:0 0 112px}.polyphony-gate-footer{flex-direction:column;align-items:flex-start}.melody-heading{grid-template-columns:1fr;gap:18px}.melody-picker{grid-template-columns:1fr}.melody-actions{flex-direction:column;align-items:flex-start}.melody-actions button,.polyphony-gate-footer button,.sequence-reset{min-height:44px}footer{flex-direction:column;align-items:flex-start}}@media (max-width:480px){.brand-logo{width:36px;height:36px}.top-actions{gap:7px}.connect-button{justify-content:center;width:42px;padding:0}.connect-label{display:none}h1{font-size:clamp(40px,12vw,48px)}.polyphony-demos{grid-template-columns:1fr}.polyphony-demos button{min-height:92px}.visual-field{min-height:clamp(400px,126vw,470px)}.field-topline{align-items:flex-start;gap:12px;top:22px;left:18px;right:18px}.field-topline>span:first-child{max-width:68%;line-height:1.55}.mode-readout{text-align:right}.modal-readout{max-height:82px;top:66px;left:18px;right:18px;overflow:hidden}.frequency-card{bottom:26px;left:18px;right:18px}.note-display{font-size:54px}.frequency-data{min-width:0}.frequency-data small{overflow-wrap:anywhere;max-width:54vw}.chord-card{min-height:118px;padding:17px 16px}.chord-card strong{font-size:27px}.chord-tone-progress{flex-wrap:wrap}.melody-trail{padding:18px 15px}.melody-picker button{padding:15px}}@media (max-width:380px){.top-actions{gap:5px}.language-toggle button{min-width:30px;padding-inline:5px}.brand-logo{width:34px;height:34px}.visual-field{min-height:410px}.frequency-data small{font-size:8px}}@media (orientation:landscape) and (max-width:950px) and (max-height:520px){.stage{padding-top:24px;padding-right:max(18px, calc(env(safe-area-inset-right,0px) + 12px));padding-bottom:36px;padding-left:max(18px, calc(env(safe-area-inset-left,0px) + 12px));grid-template-columns:minmax(210px,.7fr) minmax(360px,1.3fr);align-items:start;gap:20px}.stage-copy{align-self:start}.eyebrow{margin-bottom:12px}h1{font-size:clamp(34px,5.7vw,46px)}.intro{margin-top:14px;font-size:12px;line-height:1.55}.polyphony-demos{gap:6px;margin-top:16px}.polyphony-demos button{gap:6px;min-height:76px;padding:9px}.polyphony-demos small{display:none}.visual-field{aspect-ratio:1.18;min-height:350px}}@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition-duration:.01ms!important}}@property --tw-outline-style{syntax:"*";inherits:false;initial-value:solid}