:root{--bg-a: #0a0820;--bg-b: #1a1638;--neon-pink: #ff77ff;--neon-cyan: #7ffaff;--neon-soft: #c0a0ff;--text-warm: #fff7e8}*{box-sizing:border-box}html,body{margin:0;padding:0;height:100%;background:#000;color:var(--text-warm);font-family:-apple-system,BlinkMacSystemFont,Hiragino Sans,system-ui,sans-serif;overflow:hidden;user-select:none;-webkit-user-select:none;-webkit-touch-callout:none;-webkit-tap-highlight-color:transparent}#game-root{position:fixed;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;background:radial-gradient(ellipse at 50% 30%,var(--bg-b) 0%,var(--bg-a) 70%,#000 100%)}#game-canvas{image-rendering:pixelated;image-rendering:-moz-crisp-edges;background:#04030f;width:min(100vw,calc(100vh * 320 / 192));height:min(100vh,calc(100vw * 192 / 320));box-shadow:0 0 80px #7ffaff2e,0 0 140px #ff77ff1a;border-radius:4px}#hud{position:fixed;top:14px;left:50%;transform:translate(-50%);width:min(100vw,calc(100vh * 320 / 192));display:flex;justify-content:space-between;padding:0 12px;pointer-events:none;font-size:14px;letter-spacing:.12em;text-shadow:0 0 6px rgba(127,250,255,.6);color:var(--text-warm);z-index:50}#stage-label{color:var(--neon-cyan)}#death-counter{color:var(--neon-pink)}.overlay{position:fixed;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;z-index:100;transition:opacity .4s ease}.overlay.hidden{opacity:0;pointer-events:none}.overlay-veil{position:absolute;top:0;right:0;bottom:0;left:0;background:radial-gradient(ellipse at center,#141030f0,#04030ffc);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}.title-content{position:relative;text-align:center;padding:24px 32px;max-width:90vw}h1{font-size:clamp(28px,6vw,56px);margin:0 0 8px;letter-spacing:.06em;background:linear-gradient(135deg,var(--neon-cyan) 0%,var(--neon-pink) 60%,var(--neon-soft) 100%);-webkit-background-clip:text;background-clip:text;color:transparent;text-shadow:0 0 26px rgba(127,250,255,.35)}h2{font-size:clamp(28px,6vw,48px);letter-spacing:.18em;margin:0 0 8px;color:var(--neon-cyan);text-shadow:0 0 24px rgba(127,250,255,.6)}.subtitle{margin:0 0 18px;font-size:clamp(13px,2.6vw,16px);color:var(--neon-soft);letter-spacing:.08em}.controls{display:flex;flex-direction:column;gap:6px;margin:14px 0 22px;font-size:clamp(11px,2.2vw,13px);color:var(--text-warm);text-align:left;display:inline-flex}.controls .dim{color:var(--neon-soft);opacity:.75}kbd{display:inline-block;padding:1px 6px;margin:0 2px;background:#ffffff14;border:1px solid rgba(192,160,255,.4);border-radius:4px;font-family:ui-monospace,SF Mono,Menlo,monospace;font-size:.85em;color:var(--text-warm)}button{font:inherit;font-size:clamp(14px,2.6vw,18px);letter-spacing:.2em;padding:10px 32px;background:linear-gradient(135deg,#7ffaff2e,#ff77ff2e);color:var(--text-warm);border:1px solid var(--neon-cyan);border-radius:999px;cursor:pointer;transition:transform .15s,box-shadow .15s;text-shadow:0 0 8px rgba(127,250,255,.6)}button:hover{transform:translateY(-2px);box-shadow:0 0 22px #7ffaff80}button:active{transform:translateY(0)}body:has(#title-screen:not(.hidden)) #hud,body:has(#cleared-screen:not(.hidden)) #hud{opacity:0}#chapter-intro{position:fixed;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;z-index:80;pointer-events:none;opacity:0;transition:opacity .55s ease}#chapter-intro.visible{opacity:1}#chapter-intro.hidden{opacity:0;pointer-events:none}#chapter-intro .chap-card{text-align:center;padding:26px 42px;border-radius:14px;background:linear-gradient(135deg,#08061af7,#281246f7);border:1px solid rgba(127,250,255,.55);box-shadow:0 8px 48px #000000bf,0 0 32px #7ffaff47;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);max-width:min(560px,88vw)}#chapter-intro .chap-index{font-size:clamp(11px,2vw,13px);color:var(--neon-cyan);letter-spacing:.18em;margin-bottom:6px}#chapter-intro .chap-title{margin:0 0 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