*{margin:0;padding:0;box-sizing:border-box}
html,body{width:100%;height:100%;background:#06060a;overflow:hidden;color:#c9d2e2;
  font-family:"Segoe UI","PingFang SC","Microsoft YaHei",system-ui,sans-serif}
#wrap{width:100%;height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:9px}
#frame{position:relative;width:min(100vw,calc(100vh * 16 / 9));aspect-ratio:16/9;border-radius:10px;overflow:hidden;
  box-shadow:0 0 0 2px #1a2136,0 0 46px rgba(90,140,255,.16),0 18px 60px rgba(0,0,0,.75)}
canvas#game{display:block;width:100%;height:100%;background:#0a0c14;cursor:crosshair}
#vig{position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(ellipse at center,rgba(0,0,0,0) 55%,rgba(0,0,0,.45) 100%)}
#hint{font-size:12.5px;letter-spacing:.2px;opacity:.72;text-align:center;line-height:1.6;padding:0 8px;
  max-width:min(100vw,calc(100vh * 16 / 9))}
#hint b{color:#ffd15c;font-weight:700}
@media (max-height:520px){#hint{display:none}}