:root {
  color-scheme: dark;
  font-family: "Courier New", Courier, monospace;
  background: #111;
  color: #fff;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  display: grid;
  place-items: center;
  background: #181818;
}

.game-shell {
  display: grid;
  justify-items: center;
  gap: 16px;
  padding: 20px;
}

#gameCanvas {
  width: 800px;
  height: 500px;
  max-width: calc(100vw - 40px);
  background: #000;
  border: 2px solid #fff;
  image-rendering: pixelated;
}

#startButton {
  min-width: 120px;
  height: 40px;
  border: 2px solid #fff;
  border-radius: 4px;
  background: #fff;
  color: #000;
  font: 700 16px/1 "Courier New", Courier, monospace;
  cursor: pointer;
}

#startButton:hover,
#startButton:focus-visible {
  background: #d8f45b;
  color: #000;
  outline: none;
}