:root {
  color-scheme: light;
  font-family:
    Inter, "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  background: #eaf7fb;
  color: #243033;
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
}

body {
  min-height: 100vh;
  display: grid;
  place-items: center;
  overflow: hidden;
  background:
    radial-gradient(circle at 18% 16%, rgba(255, 245, 178, 0.9), transparent 28%),
    radial-gradient(circle at 84% 20%, rgba(190, 231, 255, 0.95), transparent 31%),
    linear-gradient(135deg, #d7fbff 0%, #fff0c8 42%, #f4d8f4 100%);
}

.game-shell {
  width: min(100vw, 980px);
  height: min(100vh, 780px);
  display: grid;
  place-items: center;
  padding: 14px;
}

canvas {
  width: min(100%, calc(100vh * 1.25));
  height: auto;
  max-height: 100%;
  aspect-ratio: 5 / 4;
  display: block;
  border: 1px solid rgba(65, 83, 89, 0.2);
  border-radius: 8px;
  box-shadow:
    0 26px 65px rgba(42, 66, 73, 0.2),
    0 0 0 8px rgba(255, 255, 255, 0.34);
  background: #e8f2ee;
  touch-action: none;
}