:root{font-family:Arial,sans-serif;color-scheme:dark;background:#06182c;color:#eefbff}*{box-sizing:border-box}body{margin:0}header{height:56px;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:8px 20px;background:#0b2540;border-bottom:1px solid #4a7696}a{color:#bce8ff;text-decoration:none}button,select{font:inherit;color:inherit;background:#183e5c;border:1px solid #88b9d4;border-radius:8px;padding:10px 14px}button{cursor:pointer}button:disabled{opacity:.6;cursor:wait}button:focus-visible,select:focus-visible,a:focus-visible{outline:3px solid #b6f75d;outline-offset:3px}main{position:relative;height:calc(100dvh - 56px);min-height:440px}#game{width:100%;height:100%;background:#000}#setup{position:absolute;inset:0;overflow:auto;display:grid;place-items:center;padding:24px;background:radial-gradient(ellipse at 70% 10%,#197da0aa,transparent 55%),linear-gradient(145deg,#073559,#031120)}[hidden]{display:none!important}.panel{width:min(100%,600px);padding:28px;border:1px solid #8cd8e3;border-radius:18px;background:linear-gradient(160deg,#073d60ef,#06182cf5);box-shadow:0 20px 70px #0008,inset 0 1px #fff8}.eyebrow{font-size:12px;letter-spacing:.18em;color:#c0efff}h1{font-size:clamp(36px,7vw,64px);line-height:.98;margin:22px 0;color:#fff;text-shadow:0 4px #00243f}h1 span{color:#fd5360}p{font-size:16px;line-height:1.55;color:#cae6f0}.small{font-size:13px;color:#a8c8d6}label{display:block;font-size:14px;margin-bottom:8px}select{width:100%;margin-bottom:16px}.primary{width:100%;font-weight:bold;padding:15px;color:#06243b;background:linear-gradient(#d4f8ff,#58c4e5 48%,#0d96c1 50%,#62e6ed);box-shadow:inset 0 1px white}progress{display:block;width:100%;height:22px;margin-top:20px;accent-color:#51e3f1}#status{min-height:26px}details{border-top:1px solid #55758c;padding-top:14px}summary{cursor:pointer}#note{position:absolute;top:8px;left:12px;right:12px;text-align:center;background:#06182ce8;padding:8px;border-radius:7px;pointer-events:none;font-size:14px}@media(max-width:560px){header{padding:8px 10px;font-size:12px;gap:8px}header strong{max-width:45%}header button{font-size:12px;padding:8px}.panel{padding:20px}#setup{padding:16px}}