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

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #8fc3ff;
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: #fff;
  user-select: none;
}

canvas { display: block; }

/* ---------- Crosshair ---------- */
#crosshair {
  position: fixed;
  left: 50%; top: 50%;
  width: 22px; height: 22px;
  transform: translate(-50%, -50%);
  pointer-events: none;
  opacity: 0.85;
  z-index: 5;
}
#crosshair::before, #crosshair::after {
  content: "";
  position: absolute;
  background: #fff;
  box-shadow: 0 0 2px rgba(0,0,0,0.8);
}
#crosshair::before { left: 50%; top: 0; width: 2px; height: 100%; transform: translateX(-50%); }
#crosshair::after  { top: 50%; left: 0; height: 2px; width: 100%; transform: translateY(-50%); }

/* ---------- HUD ---------- */
#hud {
  position: fixed;
  top: 8px; left: 8px;
  font-size: 13px;
  line-height: 1.5;
  text-shadow: 1px 1px 2px rgba(0,0,0,0.9);
  pointer-events: none;
  z-index: 5;
  white-space: pre;
}

/* ---------- Hotbar ---------- */
#hotbar {
  position: fixed;
  left: 50%; bottom: 14px;
  transform: translateX(-50%);
  display: flex;
  gap: 6px;
  padding: 6px;
  background: rgba(0,0,0,0.35);
  border: 2px solid rgba(0,0,0,0.5);
  border-radius: 6px;
  z-index: 5;
}
.slot {
  width: 52px; height: 52px;
  border: 2px solid rgba(255,255,255,0.25);
  border-radius: 4px;
  background: rgba(0,0,0,0.25);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
.slot.active { border-color: #fff; box-shadow: 0 0 8px rgba(255,255,255,0.6); }
.slot .num {
  position: absolute;
  top: 2px; left: 4px;
  font-size: 11px;
  text-shadow: 1px 1px 2px #000;
}
.slot .swatch {
  width: 34px; height: 34px;
  border-radius: 3px;
  border: 1px solid rgba(0,0,0,0.4);
  image-rendering: pixelated;
}

/* ---------- Start-Overlay ---------- */
#overlay {
  position: fixed;
  inset: 0;
  background: radial-gradient(circle at 50% 40%, rgba(40,70,110,0.85), rgba(10,20,35,0.92));
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  cursor: pointer;
  transition: opacity 0.4s ease;
}
#overlay.hidden { opacity: 0; pointer-events: none; }
.panel {
  text-align: center;
  background: rgba(0,0,0,0.45);
  border: 1px solid rgba(255,255,255,0.15);
  padding: 30px 42px;
  border-radius: 12px;
  max-width: 560px;
}
.panel h1 { font-size: 30px; margin-bottom: 10px; letter-spacing: 1px; }
.panel p { font-size: 16px; margin-bottom: 16px; opacity: 0.9; }
.keys { font-size: 13px; line-height: 1.9; opacity: 0.85; }
.keys b { color: #ffe08a; }