/* style.css — all styling */
*{box-sizing:border-box}
html{color-scheme:dark}
html[data-theme="light"]{color-scheme:light}
:root{
  --bg:#1a1226;
  --fg:#f6ead6;
  --muted:#c9a86a;
  --panel:rgba(26,18,38,0.55);
  --panel-brd:rgba(246,200,115,0.25);
  --wkey:#fbf3e0;
  --wkey-sh:#d9c79a;
  --bkey:#2a1d2f;
  --bkey-sh:#100a18;
  --accent:#ffb347;
  --glow:rgba(255,179,71,0.55);
}
html[data-theme="light"]{
  --bg:#f3e7d0;
  --fg:#3a2410;
  --muted:#8a5a22;
  --panel:rgba(255,250,238,0.7);
  --panel-brd:rgba(138,90,34,0.3);
  --accent:#d9801f;
  --wkey:#fef9ef;
  --wkey-sh:#e8dcc5;
  --bkey:#3a2a3a;
  --bkey-sh:#1a101a;
}
@media (prefers-color-scheme: light){
  html:not([data-theme="dark"]){ color-scheme:light;
    --bg:#f3e7d0; --fg:#3a2410; --muted:#8a5a22;
    --panel:rgba(255,250,238,0.7); --panel-brd:rgba(138,90,34,0.3); --accent:#d9801f;
  }
}
html,body{margin:0;height:100%;background:var(--bg);color:var(--fg);font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;overflow-x:hidden}
.scene{position:fixed;inset:0;z-index:0;background:linear-gradient(180deg,#fde68a 0%,#f59e0b 35%,#b45309 100%);overflow:hidden}
.gf{position:absolute;top:0;animation:fall linear infinite;pointer-events:none;will-change:transform;filter:drop-shadow(0 3px 6px rgba(0,0,0,0.15))}
@keyframes fall{
  0%{transform:translateY(-60px) rotate(var(--r,0deg));opacity:0}
  10%{opacity:0.85}
  90%{opacity:0.85}
  100%{transform:translateY(115vh) rotate(var(--r,0deg));opacity:0}
}
.app{position:relative;z-index:2;max-width:1100px;margin:0 auto;padding:18px 14px 28px;display:flex;flex-direction:column;gap:14px;min-height:100%}
.head{background:var(--panel);border:1px solid var(--panel-brd);border-radius:18px;padding:16px 18px;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);box-shadow:0 10px 30px rgba(0,0,0,0.25)}
.head h1{margin:0;font-size:clamp(22px,5vw,34px);font-weight:800;letter-spacing:-0.02em;background:linear-gradient(90deg,#fff4c2,#ffb347,#e87b4a);-webkit-background-clip:text;background-clip:text;color:transparent}
.head .sub{margin:4px 0 12px;color:var(--muted);font-size:14px}
.controls{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.btn{appearance:none;border:1px solid var(--panel-brd);background:rgba(255,255,255,0.06);color:var(--fg);padding:9px 14px;border-radius:999px;font-size:14px;font-weight:600;cursor:pointer;transition:transform .12s ease,background .2s ease,box-shadow .2s ease;touch-action:manipulation}
.btn:hover{background:rgba(255,179,71,0.18);transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.btn.on{background:linear-gradient(90deg,#e87b4a,#ffb347);color:#1a1226;border-color:transparent;box-shadow:0 0 18px var(--glow);animation:pulse 1.1s ease-in-out infinite}
.mute-btn{border-color:rgba(255,179,71,0.5)}
.mute-btn.muted{background:linear-gradient(90deg,#5a3a1a,#7a4a22);color:#ffd9a0;border-color:var(--accent);box-shadow:0 0 12px rgba(255,179,71,0.3)}
.mute-btn:not(.muted){background:linear-gradient(90deg,#2a6a3a,#3a8a4a);color:#eaffe6;border-color:transparent}
@keyframes pulse{0%,100%{box-shadow:0 0 14px var(--glow)}50%{box-shadow:0 0 24px var(--glow)}}
.mute-msg{margin-top:10px;padding:11px 16px;border-radius:12px;background:rgba(255,179,71,0.14);border:1px solid var(--panel-brd);color:var(--accent);font-size:14px;font-weight:600;text-align:center;animation:fadein .3s ease}
.mute-msg b{color:var(--fg);background:rgba(255,179,71,0.22);padding:2px 8px;border-radius:6px;font-weight:700}
@keyframes fadein{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}
.sel{appearance:none;border:1px solid var(--panel-brd);background:rgba(255,255,255,0.06);color:var(--fg);padding:9px 32px 9px 14px;border-radius:999px;font-size:14px;font-weight:600;cursor:pointer;transition:transform .12s ease,background .2s ease;touch-action:manipulation;position:relative;min-width:100px}
.sel:after{content:"▾";position:absolute;right:10px;top:50%;transform:translateY(-50%);pointer-events:none;color:var(--muted)}
.sel:hover{background:rgba(255,179,71,0.18)}
.sel:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.vol{appearance:none;height:8px;background:var(--panel-brd);border-radius:8px;outline:0;cursor:pointer;flex:1;min-width:64px;transition:background .2s}
.vol::-webkit-slider-thumb{appearance:none;width:18px;height:18px;border-radius:50%;background:var(--accent);cursor:pointer;box-shadow:0 2px 6px rgba(0,0,0,0.3)}
.vol::-moz-range-thumb{width:18px;height:18px;border-radius:50%;background:var(--accent);cursor:pointer;border:0}
.badge{font-size:13px;font-weight:700;color:var(--accent);background:rgba(255,179,71,0.12);padding:6px 12px;border-radius:999px;margin-top:8px;display:flex;align-items:center;justify-content:center;gap:6px;transition:background .2s}
.status{margin-top:10px;font-size:13px;color:var(--muted);min-height:18px}
.piano{position:relative;background:linear-gradient(180deg,#3a2718,#1a0f08);border-radius:16px;padding:14px 12px 16px;box-shadow:0 18px 40px rgba(0,0,0,0.5),inset 0 2px 0 rgba(255,220,150,0.15)}
.piano::before{content:"";position:absolute;left:12px;right:12px;top:6px;height:6px;background:linear-gradient(90deg,transparent,#ffb347,transparent);opacity:0.4;border-radius:6px}
.keys{position:relative;height:clamp(150px,38vh,230px);width:100%;user-select:none;border-radius:8px;overflow:hidden;box-shadow:inset 0 0 0 1px rgba(0,0,0,0.4);touch-action:none}
.wkey,.bkey{position:absolute;top:0;bottom:0;border:0;margin:0;padding:0;cursor:pointer;transition:transform .04s ease,box-shadow .15s ease,background .08s ease}
.wkey{background:linear-gradient(180deg,var(--wkey) 0%,var(--wkey) 92%,var(--wkey-sh) 100%);border-right:1px solid rgba(0,0,0,0.18);border-radius:0 0 6px 6px;display:flex;align-items:flex-end;justify-content:center;padding-bottom:8px}
.wkey:last-child{border-right:0}
.wkey span{font-size:clamp(9px,2.4vw,12px);color:#9a7b46;font-weight:600;letter-spacing:0.02em;pointer-events:none}
.bkey{background:linear-gradient(180deg,#3a2740 0%,var(--bkey) 60%,var(--bkey-sh) 100%);border-radius:0 0 5px 5px;z-index:3;box-shadow:0 4px 6px rgba(0,0,0,0.5),inset 0 -3px 0 rgba(0,0,0,0.5),inset 0 2px 0 rgba(255,255,255,0.06)}
.wkey:hover{background:linear-gradient(180deg,#fff8e6 0%,#f3e6c0 92%,var(--wkey-sh) 100%)}
.bkey:hover{background:linear-gradient(180deg,#4a374f 0%,#35233a 60%,var(--bkey-sh) 100%)}
.wkey.active,.bkey.active{transform:translateY(2px)}
.wkey.active{background:linear-gradient(180deg,#ffd98a 0%,#ffb347 92%,#e0922a 100%);box-shadow:inset 0 0 14px rgba(255,160,60,0.5)}
.bkey.active{background:linear-gradient(180deg,#ffb347 0%,#e87b4a 60%,#a84a1a 100%);box-shadow:0 0 16px var(--glow)}
.hint{font-size:12px;color:var(--muted);text-align:center;padding:0 8px;line-height:1.6}
.hint b{color:var(--fg);background:rgba(255,179,71,0.14);padding:1px 6px;border-radius:5px;font-weight:700}
.welcome{position:relative;z-index:3;margin:0 auto;max-width:680px;padding:14px 20px;border-radius:14px;text-align:center;font-size:clamp(14px,3.4vw,18px);font-weight:700;letter-spacing:0.01em;color:var(--fg);background:linear-gradient(90deg,rgba(255,179,71,0.22),rgba(232,123,74,0.22));border:1px solid var(--panel-brd);box-shadow:0 8px 24px rgba(0,0,0,0.3),0 0 18px rgba(255,179,71,0.18);opacity:0;transform:translateY(-8px) scale(0.98);pointer-events:none;transition:opacity .5s ease,transform .5s ease}
.welcome.show{opacity:1;transform:translateY(0) scale(1);animation:welglow 2.4s ease-in-out infinite}
.welcome.hide{opacity:0;transform:translateY(-10px) scale(0.98)}
@keyframes welglow{0%,100%{box-shadow:0 8px 24px rgba(0,0,0,0.3),0 0 14px rgba(255,179,71,0.15)}50%{box-shadow:0 8px 24px rgba(0,0,0,0.3),0 0 26px rgba(255,179,71,0.4)}}
@media (max-width:480px){
  .head{padding:14px}
  .wkey span{display:none}
  .btn,.sel{padding:8px 11px;font-size:13px}
  .controls{gap:6px}
  .welcome{padding:11px 14px}
}