:root {
  color-scheme: light;
  --page-top: #98c7e8;
  --page-bottom: #eef4fb;
  --frame: #163449;
  --frame-shadow: rgba(10, 30, 45, 0.22);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at top, rgba(255, 255, 255, 0.8), transparent 36%),
    linear-gradient(180deg, var(--page-top), var(--page-bottom));
  font-family: Georgia, "Times New Roman", serif;
}

.page-shell {
  width: min(100vw, 1100px);
  padding: 24px;
}

.game-frame {
  padding: 16px;
  border-radius: 22px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.6), rgba(255, 255, 255, 0.24));
  box-shadow: 0 20px 60px var(--frame-shadow);
}

canvas {
  display: block;
  width: 100%;
  height: auto;
  border: 8px solid var(--frame);
  border-radius: 18px;
  background: #8cc5e8;
}