* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #85b8ff;
  font-family: Arial, sans-serif;
  touch-action: none;
}

canvas {
  display: block;
}

#hud {
  position: fixed;
  top: 12px;
  left: 12px;
  color: #ffffff;
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 10px;
  padding: 10px 12px;
  z-index: 10;
}

#hud h1 {
  margin: 0 0 6px;
  font-size: 18px;
}

#hud p {
  margin: 0;
  font-size: 13px;
}

#mobile-controls {
  position: fixed;
  inset: 0;
  z-index: 20;
  pointer-events: none;
  display: none;
}

.stick-zone {
  position: absolute;
  bottom: 18px;
  width: 44vw;
  max-width: 250px;
  min-width: 160px;
  height: 44vw;
  max-height: 250px;
  min-height: 160px;
  pointer-events: none;
}

.stick-zone.left {
  left: 12px;
}

.stick-zone.right {
  right: 12px;
}

.stick {
  position: absolute;
  inset: 0;
  margin: auto;
  width: min(38vw, 210px);
  height: min(38vw, 210px);
  min-width: 140px;
  min-height: 140px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.35);
  background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.22), rgba(0, 0, 0, 0.22));
  backdrop-filter: blur(2px);
  pointer-events: auto;
  touch-action: none;
}

.thumb {
  position: absolute;
  left: 50%;
  top: 50%;
  width: min(14vw, 72px);
  height: min(14vw, 72px);
  min-width: 46px;
  min-height: 46px;
  margin-left: calc(min(14vw, 72px) / -2);
  margin-top: calc(min(14vw, 72px) / -2);
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, rgba(255, 255, 255, 0.85), rgba(190, 210, 255, 0.6));
  border: 1px solid rgba(255, 255, 255, 0.7);
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.25);
}

.mobile-buttons {
  position: absolute;
  right: 8px;
  top: -2px;
  display: grid;
  gap: 10px;
  pointer-events: auto;
}

.mobile-btn {
  border: 1px solid rgba(255, 255, 255, 0.55);
  border-radius: 14px;
  background: rgba(10, 14, 24, 0.45);
  color: #fff;
  font-weight: 700;
  padding: 10px 14px;
  min-width: 94px;
  letter-spacing: 0.4px;
  touch-action: manipulation;
}

.mobile-btn:active {
  background: rgba(120, 180, 255, 0.35);
}

@media (hover: none) and (pointer: coarse) {
  #mobile-controls {
    display: block;
  }

  #hud {
    top: 8px;
    left: 8px;
    right: 8px;
    max-width: 360px;
    font-size: 12px;
  }
}