:root {
  color-scheme: dark;
  --page-bg: #080914;
  --panel: rgba(14, 17, 38, 0.72);
  --edge: rgba(255, 255, 255, 0.16);
  --glow: rgba(98, 160, 255, 0.34);
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  overflow: hidden;
  background:
    radial-gradient(circle at 18% 10%, rgba(79, 188, 255, 0.16), transparent 28rem),
    radial-gradient(circle at 85% 90%, rgba(255, 214, 102, 0.1), transparent 24rem),
    linear-gradient(135deg, #080914 0%, #101633 52%, #070812 100%);
  color: #fff;
  font-family: Arial, Helvetica, sans-serif;
  overscroll-behavior: none;
}

.game-shell {
  display: grid;
  width: 100vw;
  height: 100svh;
  min-height: 100svh;
  overflow: hidden;
  place-items: center;
  padding: max(10px, env(safe-area-inset-top)) max(10px, env(safe-area-inset-right))
    max(10px, env(safe-area-inset-bottom)) max(10px, env(safe-area-inset-left));
}

canvas {
  display: block;
  width: min(calc(100vw - 20px), calc((100svh - 20px) * 4 / 3));
  max-width: none;
  aspect-ratio: 4 / 3;
  height: auto;
  border: 1px solid var(--edge);
  border-radius: 10px;
  background: #0a0a1a;
  box-shadow: 0 22px 80px rgba(0, 0, 0, 0.42), 0 0 34px var(--glow);
  cursor: none;
  touch-action: none;
  user-select: none;
  transform: translateZ(0);
}

canvas.screen-shake {
  animation: screen-shake 320ms cubic-bezier(0.36, 0.07, 0.19, 0.97) both;
}

@keyframes screen-shake {
  0%,
  100% {
    transform: translate3d(0, 0, 0);
  }
  12% {
    transform: translate3d(-10px, 6px, 0);
  }
  25% {
    transform: translate3d(9px, -7px, 0);
  }
  37% {
    transform: translate3d(-8px, -5px, 0);
  }
  50% {
    transform: translate3d(7px, 6px, 0);
  }
  62% {
    transform: translate3d(-5px, 4px, 0);
  }
  75% {
    transform: translate3d(4px, -3px, 0);
  }
  87% {
    transform: translate3d(-2px, 2px, 0);
  }
}

@media (orientation: portrait) {
  .game-shell {
    align-content: center;
  }
}