:root{--bg:#f7e4dd;--ink:#a07464;--btn-bg:#fffaf6c7;--btn-border:#a074642e;--safe-top:env(safe-area-inset-top,0px);--safe-right:env(safe-area-inset-right,0px);--safe-bottom:env(safe-area-inset-bottom,0px);--safe-left:env(safe-area-inset-left,0px)}html,body{background:var(--bg);touch-action:none;overscroll-behavior:none;-webkit-user-select:none;user-select:none;-webkit-touch-callout:none;-webkit-tap-highlight-color:transparent;-webkit-text-size-adjust:100%;width:100%;height:100%;margin:0;padding:0;overflow:hidden}body{color:var(--ink);font-family:Hiragino Maru Gothic ProN,Hiragino Sans,Yu Gothic UI,Meiryo,Noto Sans JP,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Noto Sans,Ubuntu,Cantarell,Helvetica Neue,sans-serif;position:fixed;top:0;bottom:0;left:0;right:0}#scene{touch-action:none;overscroll-behavior:none;-webkit-user-select:none;user-select:none;-webkit-touch-callout:none;-webkit-tap-highlight-color:transparent;outline:none;width:100%;height:100%;display:block;position:fixed;top:0;bottom:0;left:0;right:0}#ui{pointer-events:none;position:fixed;top:0;bottom:0;left:0;right:0}.ui-btn{bottom:calc(16px + var(--safe-bottom));border:1px solid var(--btn-border);background:var(--btn-bg);min-width:52px;height:52px;color:var(--ink);font:inherit;letter-spacing:.08em;pointer-events:auto;cursor:pointer;touch-action:manipulation;-webkit-tap-highlight-color:transparent;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);border-radius:999px;justify-content:center;align-items:center;gap:6px;padding:0 18px 0 14px;font-size:16px;font-weight:700;transition:transform .12s,background-color .2s,opacity .2s;display:inline-flex;position:absolute;box-shadow:0 4px 14px #96605424}.ui-btn svg{flex:none;width:24px;height:24px}.ui-btn:active{transform:scale(.94)}.ui-btn:focus-visible{outline-offset:2px;outline:3px solid #a0746473}.ui-reset{left:calc(16px + var(--safe-left))}.ui-right{right:calc(16px + var(--safe-right));bottom:calc(16px + var(--safe-bottom));pointer-events:none;gap:10px;display:flex;position:absolute}.ui-right .ui-btn{position:static}.ui-powder .powder-dots{opacity:0;transition:opacity .3s}.ui-powder.is-on{background:#fffdfaf2;box-shadow:0 4px 14px #96605424,inset 0 0 0 2px #ffffffe6}.ui-powder.is-on .powder-dots{opacity:1}.ui-powder.is-hidden{opacity:0;pointer-events:none;transform:scale(.7)}@media (max-width:420px){.ui-right .ui-btn span{display:none}.ui-right .ui-btn{width:52px;padding:0}}.ui-sound.is-off{opacity:.6}.hint{letter-spacing:.16em;color:#8c5c4e6b;white-space:nowrap;pointer-events:none;padding-left:.16em;font-size:clamp(20px,5.4vw,32px);font-weight:700;transition:opacity .8s;animation:2.4s ease-in-out infinite hint-breathe;position:absolute;top:24%;left:50%;transform:translate(-50%,-50%)}.hint.is-hidden{animation:none;opacity:0!important}@keyframes hint-breathe{0%,to{opacity:.55}50%{opacity:1}}@media (prefers-reduced-motion:reduce){.hint{animation:none}}