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

html, body {
  height: 100%;
  overflow: hidden;
  background: #0E5FD8;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

#game {
  position: fixed;
  inset: 0;
  touch-action: none;
}

canvas {
  display: block;
  width: 100%;
  height: 100%;
}

/* ---- HUD ---- */
#hud {
  position: absolute;
  top: 12px;
  left: 12px;
  right: 12px;
  display: flex;
  align-items: center;
  gap: 12px;
  pointer-events: none;
}

#score {
  font-weight: 800;
  font-size: 32px;
  color: #FBF3E4;
  text-shadow: 3px 3px 0 #16130F;
  min-width: 60px;
}

#wave {
  font-weight: 800;
  font-size: 20px;
  color: #FBF3E4;
  text-shadow: 2px 2px 0 #16130F;
  white-space: nowrap;
}

#health {
  flex: 1;
  max-width: 220px;
  height: 20px;
  background: #16130F;
  border: 3px solid #16130F;
  border-radius: 4px;
  overflow: hidden;
}

#healthbar {
  display: block;
  height: 100%;
  width: 100%;
  background: #FF4A1C;
  transition: width 120ms ease-out;
}

/* ---- Touch controls ---- */
#controls {
  position: absolute;
  bottom: 24px;
  left: 24px;
  right: 24px;
  display: flex;
  justify-content: space-between;
}

.ctrl {
  width: 90px;
  height: 90px;
  font-size: 52px;
  line-height: 1;
  color: #16130F;
  background: #FBF3E4;
  border: 4px solid #16130F;
  border-radius: 10px;
  box-shadow: 4px 4px 0 0 #16130F;
  font-weight: 800;
  touch-action: none;
}

.ctrl:active {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 0 #16130F;
  background: #FF4A1C;
}

/* ---- Game over ---- */
#over {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  background: rgba(22, 19, 15, 0.72);
}

#over.hidden { display: none; }

#overtitle {
  font-size: 56px;
  font-weight: 800;
  color: #FBF3E4;
  text-shadow: 4px 4px 0 #FF4A1C;
}

#overscore {
  font-size: 24px;
  color: #FBF3E4;
}

#again {
  margin-top: 12px;
  padding: 16px 32px;
  font-size: 24px;
  font-weight: 800;
  color: #16130F;
  background: #FF4A1C;
  border: 4px solid #16130F;
  border-radius: 10px;
  box-shadow: 5px 5px 0 0 #16130F;
}

#again:active {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 0 #16130F;
}

/* Hide touch buttons when a real mouse is present */
@media (hover: hover) and (pointer: fine) {
  #controls { display: none; }
}