/* ==========================================================================
   Intro animation overlay
   ※ 取り消す場合: このファイルと intro-anim.js を削除し、
     index.html から link/overlay div/script の3行を削除
   ========================================================================== */
.intro-anim {
  position: fixed;
  inset: 0;
  z-index: 100;
  pointer-events: none;
  background: transparent;
}
.intro-anim__canvas {
  width: 100%;
  height: 100%;
  display: block;
}
.intro-anim.is-done {
  opacity: 0;
  transition: opacity 0.45s ease;
}
.intro-anim.is-removed {
  display: none;
}

@media (prefers-reduced-motion: reduce) {
  .intro-anim { display: none; }
}