:root {
  --bg: #101719;
  --panel: #1b2528;
  --ink: #dce7ea;
  --accent: #f2b91f;
}

* {
  box-sizing: border-box;
}

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

body {
  background: radial-gradient(circle at 20% 10%, #1f2f33, var(--bg));
  color: var(--ink);
  font-family: "Trebuchet MS", "Verdana", sans-serif;
}

.app-shell {
  width: min(96vw, 1040px);
  margin: 24px auto;
  display: grid;
  justify-items: center;
  gap: 10px;
}

h1 {
  margin: 0;
  letter-spacing: 0.03em;
}

canvas {
  display: block;
  border: 2px solid #2a383d;
  background: var(--panel);
  image-rendering: pixelated;
  max-width: 100%;
  height: auto;
}

.hint {
  margin: 0;
  opacity: 0.85;
  color: var(--accent);
}