:root {
  color-scheme: dark;
  --panel: #101820;
  --ink: #f4f0d8;
  --accent: #ffcf4a;
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: #05070a;
  color: var(--ink);
  font-family: "Courier New", monospace;
}

body {
  display: grid;
  place-items: center;
}

#game-shell {
  position: relative;
  width: min(100vw, calc(100vh * 16 / 9));
  height: min(100vh, calc(100vw * 9 / 16));
  background: #000;
  box-shadow:
    0 0 0 2px #26323a,
    0 18px 70px rgba(0, 0, 0, 0.7);
}

#game {
  width: 100%;
  height: 100%;
  display: block;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

#crt-mask {
  pointer-events: none;
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(
      to bottom,
      rgba(255, 255, 255, 0.06) 0,
      rgba(255, 255, 255, 0.06) 1px,
      rgba(0, 0, 0, 0.1) 2px,
      rgba(0, 0, 0, 0.1) 4px
    );
  mix-blend-mode: soft-light;
  opacity: 0.38;
}