/* ============================================
   ALIWORLD — game canvas + overlay UI
   ============================================ */

#game-screen {
  width: 100%;
  height: 100vh;
  height: 100dvh;
  padding: 0;
  margin: 0;
  position: fixed;
  inset: 0;
  background: var(--ink);
}

#game-screen.visible {
  display: flex;
  align-items: center;
  justify-content: center;
}

#game-container {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

#game-container canvas {
  display: block;
  image-rendering: pixelated;
  image-rendering: -moz-crisp-edges;
  image-rendering: crisp-edges;
  /* prevent canvas from being draggable */
  -webkit-user-drag: none;
  user-select: none;
}

/* overlay UI floats above the canvas */
#game-overlay {
  position: absolute;
  top: 0;
  right: 0;
  padding: 0.75rem;
  z-index: 10;
  pointer-events: none;
}

#game-overlay > * {
  pointer-events: auto;
}

.overlay-btn {
  background: rgba(20, 17, 15, 0.85);
  color: var(--cream-dim);
  border: 1px solid var(--border);
  font-family: inherit;
  font-size: 1.125rem;
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: 50%;
  cursor: pointer;
  transition: all 0.15s ease;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.overlay-btn:hover {
  color: var(--red);
  border-color: var(--red);
}

/* on the game screen, hide the back-link (it's not relevant during gameplay) */
#game-screen.visible ~ #back-link {
  display: none !important;
}