/* トップページのシンプルなローディング演出 */
body.home-page.is-loading { overflow: hidden; }

.home-loader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: grid;
  place-items: center;
  background: #1a1a1a;
  color: #fff;
  opacity: 1;
  visibility: visible;
  transition: opacity .45s ease, visibility .45s ease;
}
.home-loader.is-leaving {
  opacity: 0;
  visibility: hidden;
}
.home-loader__stage {
  width: min(calc(100% - 48px), 420px);
  text-align: center;
}
.home-loader__logo {
  opacity: 0;
  transform: translateY(8px);
  animation: loader-logo-reveal .55s .08s ease-out forwards;
}
.home-loader__logo img {
  display: block;
  width: 100%;
  height: auto;
}
.home-loader__progress {
  display: block;
  width: min(68%, 260px);
  height: 2px;
  margin: 22px auto 0;
  overflow: hidden;
  background: rgba(255,255,255,.12);
}
.home-loader__progress i {
  display: block;
  width: 100%;
  height: 100%;
  background: #316a56;
  transform: translateX(-101%);
  animation: loader-progress 1s .15s ease-out forwards;
}

@keyframes loader-logo-reveal {
  to { opacity: 1; transform: translateY(0); }
}
@keyframes loader-progress {
  to { transform: translateX(0); }
}

@media (max-width: 640px) {
  .home-loader__stage { width: min(calc(100% - 40px), 340px); }
  /* スマホでは遷移用ロゴを出さず、短い背景フェードだけにする。 */
  .home-loader__logo { display: none; }
  .home-loader__progress { margin-top: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .home-loader { transition-duration: .01ms; }
  .home-loader__logo,
  .home-loader__progress i { animation: none; opacity: 1; transform: none; }
}