*{box-sizing:border-box;margin:0;padding:0}html,body{min-height:100%;background:#06080f;color:#c8d8e8;font-family:Segoe UI,system-ui,sans-serif}#app{min-height:100vh;display:flex;flex-direction:column;align-items:center;padding:12px 12px 24px;gap:12px}.site-header{width:min(960px,100%);display:flex;align-items:center;justify-content:space-between;gap:12px}.brand{display:flex;align-items:center;gap:12px}.brand-mark{width:36px;height:36px;border-radius:10px;background:radial-gradient(circle at 40% 40%,#ff4d8a,#5a1a40 70%);box-shadow:0 0 16px #ff4d8a59;flex-shrink:0}.site-header h1{font-size:1.15rem;font-weight:700;color:#7ec8ff;letter-spacing:.02em;line-height:1.2}.tagline{font-size:.78rem;color:#6a849c;margin-top:2px}.link-out{font-size:.8rem;color:#7ec8ff;text-decoration:none;border:1px solid #2a4a6a;padding:6px 10px;border-radius:8px;background:#0a1220;white-space:nowrap}.link-out:hover{border-color:#3d9eff;background:#101a2c}main{width:min(960px,100%);flex:1;display:flex;justify-content:center}#game-container{width:100%;max-width:960px;aspect-ratio:960 / 640;max-height:min(70vh,640px);display:flex;align-items:center;justify-content:center}#game-container canvas{display:block;width:100%!important;height:100%!important;max-width:100%;max-height:min(70vh,640px);border-radius:10px;box-shadow:0 0 40px #28b4ff1f;touch-action:none}.how-to{width:min(960px,100%);background:#0a1220;border:1px solid #1e3048;border-radius:12px;padding:14px 16px 16px}.how-to h2{font-size:.95rem;color:#7ec8ff;margin-bottom:8px}.how-to ol{margin:0 0 10px 1.1rem;font-size:.88rem;line-height:1.45;color:#a8bcd0}.how-to li{margin-bottom:4px}.how-to strong{color:#e0eefc}.how-to .hint{font-size:.78rem;color:#5a7088;border-top:1px solid #1a2838;padding-top:8px}@media(max-width:640px){#app{padding:8px 8px 16px}.site-header h1{font-size:1rem}#game-container{max-height:min(58vh,520px)}.link-out{display:none}}