* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html,
body {
  margin: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #030713;
  color: #e8fbff;
  font-family: "Trebuchet MS", Arial, sans-serif;
}

#game-shell {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at 50% 50%, rgba(57, 0, 107, 0.28), transparent 40%),
    radial-gradient(circle at 15% 25%, rgba(0, 219, 255, 0.14), transparent 35%),
    linear-gradient(180deg, #040817 0%, #020410 100%);
}

canvas {
  display: block;
  width: 100vw;
  height: 100vh;
  cursor: pointer;
  touch-action: manipulation;
}

#mobile-hint {
  position: fixed;
  left: 50%;
  bottom: 10px;
  transform: translateX(-50%);
  padding: 8px 14px;
  border: 1px solid rgba(63, 229, 255, 0.4);
  border-radius: 999px;
  color: rgba(219, 249, 255, 0.85);
  background: rgba(5, 10, 28, 0.58);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0.82;
  pointer-events: none;
}

@media (min-width: 720px) {
  #mobile-hint {
    display: none;
  }
}