:root{--bg: #f4f3f0;--bg-2: #efeee9;--surface: #ffffff;--surface-2: #faf9f6;--surface-3: #f1efe9;--ink: #15181d;--ink-2: #565b66;--ink-3: #898e99;--line: rgba(21, 24, 29, .1);--line-2: rgba(21, 24, 29, .06);--accent: #ef6f53;--accent-deep: color-mix(in srgb, var(--accent) 76%, #000 24%);--accent-soft: color-mix(in srgb, var(--accent) 12%, transparent);--accent-ink: #ffffff;--sky-1: #f7f6f2;--sky-2: #eceae3;--star: rgba(21,24,29,.1);--radius: 16px;--maxw: 1180px;--font: "IBM Plex Sans JP", system-ui, sans-serif;--mono: "IBM Plex Mono", ui-monospace, monospace;--round: "Zen Maru Gothic", "IBM Plex Sans JP", sans-serif;--fx-scale: 1}[data-theme=dark]{--bg: #111322;--bg-2: #0c0e1a;--surface: #1a1d31;--surface-2: #20243b;--surface-3: #262a44;--ink: #eef0f7;--ink-2: #aab0c6;--ink-3: #6f7591;--line: rgba(255,255,255,.12);--line-2: rgba(255,255,255,.06);--accent-soft: color-mix(in srgb, var(--accent) 24%, transparent);--sky-1: #161a30;--sky-2: #0b0d18;--star: rgba(255,255,255,.16)}[data-intensity=calm]{--fx-scale: .72}[data-intensity=lively]{--fx-scale: 1.32}*{box-sizing:border-box;margin:0;padding:0}html,body{height:100%}body{font-family:var(--font);color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow:hidden;overscroll-behavior:none;-webkit-tap-highlight-color:transparent;touch-action:manipulation}a{color:inherit;text-decoration:none}button{font-family:inherit}.gate{position:fixed;inset:0;z-index:30;display:flex;flex-direction:column;align-items:center;justify-content:space-between;padding:clamp(18px,3vw,34px);background:radial-gradient(120% 80% at 50% -6%,var(--bg-2) 0%,var(--bg) 60%);transition:opacity .5s ease,visibility .5s}.gate.is-hidden{opacity:0;visibility:hidden;pointer-events:none}.gate:before{content:"";position:absolute;inset:0;pointer-events:none;background-image:linear-gradient(to right,var(--line-2) 1px,transparent 1px),linear-gradient(to bottom,var(--line-2) 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46%,var(--accent-deep) 100%);box-shadow:inset -14px -16px 34px #78281457,inset 10px 12px 26px #ffffff80,0 24px 50px -22px color-mix(in srgb,var(--accent) 70%,#000 18%)}.planet__body:after{content:"";position:absolute;inset:0;border-radius:50%;opacity:.5;background:radial-gradient(circle at 64% 38%,rgba(120,40,20,.28) 0 9px,transparent 10px),radial-gradient(circle at 40% 66%,rgba(120,40,20,.22) 0 13px,transparent 14px),radial-gradient(circle at 30% 44%,rgba(255,255,255,.4) 0 6px,transparent 7px)}.planet__ring{position:absolute;left:50%;top:50%;width:172%;height:56%;transform:translate(-50%,-50%) rotate(-20deg);border-radius:50%;border:9px solid color-mix(in srgb,var(--accent) 52%,#fff 32%);opacity:.8}.planet__moon{position:absolute;width:26px;height:26px;border-radius:50%;background:radial-gradient(60% 60% at 36% 34%,#fff,#c9ccd8 70%,#9aa0b4);top:6%;right:-6%;box-shadow:0 6px 14px -6px #0006;animation:moonOrbit 5.5s ease-in-out 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var(--line);background:var(--surface);font-size:12.5px;color:var(--ink-2)}.keychip kbd{font-family:var(--mono);font-size:11px;font-weight:600;padding:2px 7px;border-radius:6px;background:var(--bg-2);border:1px solid var(--line);color:var(--ink)}.playbtn{display:inline-flex;align-items:center;gap:12px;font-family:var(--round);font-weight:700;font-size:clamp(19px,2.4vw,24px);letter-spacing:.08em;color:var(--accent-ink);padding:16px 38px;border:none;border-radius:999px;cursor:pointer;background:linear-gradient(180deg,var(--accent),var(--accent-deep));box-shadow:0 16px 34px -14px color-mix(in srgb,var(--accent) 75%,#000 10%),inset 0 2px #fff6;transition:transform .16s cubic-bezier(.3,.7,.4,1.4),box-shadow .16s}.playbtn:hover{transform:translateY(-2px) scale(1.02)}.playbtn:active{transform:translateY(0) scale(.98)}.playbtn 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