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

body {
  font-family: 'Noto Sans JP', sans-serif;
  background: #fefefe;
  color: #000;
  height: 100vh;
  overflow: hidden;
  touch-action: none;
}

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

#title {
  position: absolute;
  top: 30px;
  left: 50%;
  transform: translateX(-50%);
  font-size: clamp(20px, 5vw, 32px);
  font-weight: 300;
  letter-spacing: 0.1em;
  pointer-events: none;
  opacity: 0.8;
}

#instruction {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: clamp(18px, 4vw, 24px);
  pointer-events: none;
  opacity: 1;
  transition: opacity 1s ease;
}

#instruction.fade {
  opacity: 0;
}