:root {
  color-scheme: dark;
  font-family: Inter, ui-rounded, system-ui, sans-serif;
  background: #05060d;
  color: #fff4c7;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  overflow: hidden;
  background:
    radial-gradient(circle at 20% 5%, #274a72 0, transparent 28rem),
    radial-gradient(circle at 80% 0%, #68295a 0, transparent 30rem),
    linear-gradient(#05060d, #0d1320 45%, #08090f);
}
main { width: min(98vw, 1060px); padding: .55rem; }
header { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-bottom: .45rem; }
.kicker { margin: 0; color: #70e8ff; font-size: .64rem; font-weight: 950; text-transform: uppercase; letter-spacing: .18em; }
h1 { margin: 0; font-size: clamp(2rem, 4.5vw, 3.8rem); line-height: .86; letter-spacing: .04em; text-shadow: 0 5px 0 #0008, 0 0 28px #ff4a73aa; }
.subtitle { max-width: 35rem; margin: 0; color: #d7e8ff; text-align: right; font-weight: 800; font-size: .92rem; }
#game { display: grid; place-items: center; }
canvas {
  width: min(98vw, 960px) !important;
  height: auto !important;
  max-height: 78vh;
  image-rendering: pixelated;
  border: 4px solid #ffeaa0;
  border-radius: 22px;
  background: #101827;
  box-shadow: 0 30px 100px #000d, 0 0 0 1px #fff5 inset, 0 0 80px #61e7ff22;
}
.help { text-align: center; color: #cfe4ff; margin: .45rem auto 0; font-size: .9rem; }
@media (max-width: 760px) { header { display: block; text-align: center; } .subtitle { text-align: center; margin: .35rem auto; } }