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

html, body {
  width: 100vw;
  height: 100vh;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: #020306;
  font-family: Impact, 'Arial Black', 'Trebuchet MS', sans-serif;
  color: #ffffff;
  user-select: none;
  -webkit-user-select: none;
}

#game-container {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  margin: 0;
  padding: 0;
  overflow: hidden;
  display: block;
  background: #020306;
}

#game-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: block;
}

/* UI Overlay Controls (top right) */
#ui-overlay {
  position: absolute;
  top: 14px;
  right: 18px;
  display: flex;
  gap: 10px;
  z-index: 100;
  pointer-events: auto;
}

.hud-btn {
  background: rgba(16, 24, 38, 0.85);
  border: 2px solid rgba(80, 140, 200, 0.5);
  color: #d0e4f8;
  padding: 7px 14px;
  font-family: Impact, 'Arial Black', sans-serif;
  font-size: 14px;
  letter-spacing: 1px;
  text-transform: uppercase;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s ease;
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  gap: 6px;
}

.hud-btn:hover {
  background: rgba(0, 150, 210, 0.85);
  border-color: #00f0ff;
  color: #ffffff;
  box-shadow: 0 0 12px rgba(0, 240, 255, 0.5);
  transform: translateY(-1px);
}

.hud-btn.active {
  background: rgba(0, 180, 220, 0.45);
  border-color: #00f0ff;
  color: #00f0ff;
}

/* Fair Exhibition Banner (Moved cleanly to Bottom Center) */
#fair-badge {
  position: absolute;
  bottom: 8px;
  left: 50%;
  transform: translateX(-50%);
  font-family: Impact, 'Arial Black', sans-serif;
  font-size: 12px;
  letter-spacing: 2px;
  color: #7799bb;
  text-transform: uppercase;
  pointer-events: none;
  z-index: 100;
  white-space: nowrap;
  background: rgba(8, 12, 20, 0.75);
  padding: 4px 14px;
  border-radius: 12px;
  border: 1px solid rgba(80, 140, 200, 0.25);
  backdrop-filter: blur(4px);
}

#fair-badge span {
  color: #ffcc00;
  letter-spacing: 2px;
}