html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  font-family: system-ui, Arial, sans-serif;
  background: #06202a;
}

canvas {
  display: block;
}

.hud {
  position: fixed;
  top: 12px;
  left: 12px;
  color: #ffe66d;
  text-shadow: 0 2px 8px rgba(0,0,0,.6);
  z-index: 5;
  user-select: none;
}

.hint {
  opacity: 0.8;
  font-size: 12px;
}

.overlay {
  position: fixed;
  inset: 0;
  display: none;
  place-items: center;
  background: rgba(0,0,0,0.45);
  z-index: 10;
}

.overlay.show { display: grid; }

.card {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,230,109,0.35);
  box-shadow: 0 10px 30px rgba(0,0,0,0.35);
  border-radius: 0;
  padding: 18px 22px;
  color: #ffe66d;
  text-align: center;
  backdrop-filter: blur(10px);
}

/* Hotbar (center bottom) */
.hotbar {
  position: fixed;
  left: 50%;
  transform: translateX(-50%);
  bottom: 18px;
  display: flex;
  gap: 8px;
  padding: 8px 12px;
  background: rgba(0,0,0,0.35);
  border: 2px solid rgba(120,120,120,0.95);
  box-shadow: 0 6px 18px rgba(0,0,0,0.45);
  border-radius: 0;
  z-index: 8;
}
.hotbar .slot {
  width: 44px;
  height: 44px;
  border-radius: 0;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(128,128,128,0.28);
  display: grid;
  place-items: center;
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(0,0,0,0.35);
}
.hotbar .slot.selected {
  outline: 2px solid rgba(255,255,255,0.9);
  outline-offset: 0;
}
.hotbar .slot canvas, .hotbar .slot .swatch {
  width: 36px;
  height: 36px;
  border-radius: 0;
}