*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  width: 100%;
  height: 100%;
  background: #000;
  overflow: hidden;
}

body {
  display: flex;
  justify-content: center;
  align-items: center;
}

#game-container {
  position: relative;
}

/* Pixel-art world: nearest-neighbour, integer scaled by JS */
#game-canvas {
  display: block;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

/* Crisp UI overlay: smooth, high-res text. Sits exactly on top. */
#ui-canvas {
  position: absolute;
  top: 0;
  left: 0;
  image-rendering: auto;
  pointer-events: none;
}

/* Fullscreen toggle button (fixed to top-right of viewport) */
#fs-btn {
  position: fixed;
  top: 10px;
  right: 12px;
  z-index: 10;
  width: 34px;
  height: 34px;
  padding: 0;
  font-size: 18px;
  line-height: 32px;
  color: #e8d8ff;
  background: rgba(20, 8, 30, 0.55);
  border: 1px solid rgba(200, 150, 255, 0.5);
  border-radius: 6px;
  cursor: pointer;
  opacity: 0.5;
  transition: opacity 0.15s, background 0.15s;
}
#fs-btn:hover {
  opacity: 1;
  background: rgba(60, 20, 90, 0.8);
}
/* Keep button subtle during fullscreen (shown on hover if needed) */
:fullscreen #fs-btn { opacity: 0.25; }

/* Install-as-app button (sits left of the fullscreen toggle, top-right).
   Hidden by default; src/pwa.js reveals it only when installation is offered. */
#install-btn {
  position: fixed;
  top: 10px;
  right: 54px;
  z-index: 11;
  height: 34px;
  padding: 0 12px;
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
  color: #f0e6ff;
  background: rgba(60, 20, 90, 0.78);
  border: 1px solid rgba(200, 150, 255, 0.7);
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.15s, transform 0.08s;
}
#install-btn:hover { background: rgba(90, 40, 140, 0.92); }
#install-btn:active { transform: scale(0.96); }
#install-btn[hidden] { display: none; }

/* ─── Mobile touch controls ─────────────────────────────────────────────────
   Fixed to the viewport corners so the buttons stay under the player's thumbs
   no matter how the canvas is scaled. The container ignores pointer events;
   only the buttons themselves are interactive, so taps elsewhere still reach
   the game canvas (e.g. selecting level-up cards). */
#touch-controls {
  position: fixed;
  inset: 0;
  z-index: 30;
  pointer-events: none;
  /* Stop the browser from scrolling/zooming when thumbs touch the controls. */
  touch-action: none;
}

.tc-cluster {
  position: fixed;
  bottom: max(18px, env(safe-area-inset-bottom));
  display: flex;
  align-items: flex-end;
  gap: 14px;
}
.tc-cluster-left  { left: max(16px, env(safe-area-inset-left)); }
.tc-cluster-right {
  right: max(16px, env(safe-area-inset-right));
  align-items: center;
}

.tc-btn {
  pointer-events: auto;
  width: 68px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  line-height: 1;
  color: #f0e6ff;
  background: rgba(20, 8, 34, 0.42);
  border: 2px solid rgba(200, 150, 255, 0.55);
  border-radius: 50%;
  cursor: pointer;
  user-select: none;
  -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
  touch-action: none;
  transition: background 0.08s, transform 0.08s;
}
/* Visual feedback while held. */
.tc-btn.tc-active {
  background: rgba(90, 40, 140, 0.85);
  transform: scale(0.92);
}
/* Jump is the primary right-thumb action — make it a touch bigger. */
.tc-jump   { width: 80px; height: 80px; font-size: 34px; }
/* Fire / Attack button: prominent, warm-toned so it reads as the action button. */
.tc-attack {
  margin-bottom: 40px;     /* lift fire up-and-left of jump for thumb reach */
  width: 76px;
  height: 76px;
  font-size: 34px;
  border-color: rgba(255, 150, 90, 0.85);
  color: #ffd9b0;
  background: rgba(70, 22, 14, 0.5);
  box-shadow: 0 0 10px rgba(255, 130, 60, 0.25);
}
.tc-attack.tc-active {
  background: rgba(200, 70, 30, 0.9);
  box-shadow: 0 0 16px rgba(255, 140, 60, 0.6);
}

/* Visibility per game state (set from JS via setTouchMode). */
#touch-controls.mode-hidden .tc-btn { display: none; }
#touch-controls.mode-menu  .tc-attack { display: none; }   /* no attack in menus */