/* ============================================================
   loader.css — ページローディング画面
============================================================ */

.loader {
  position: fixed;
  inset: 0;
  z-index: 10001;
  pointer-events: none;
}

/* ---- 上下カーテン ---- */
.loader__curtain {
  position: absolute;
  left: 0;
  width: 100%;
  height: 50%;
  background: #000f1e;
}
.loader__curtain--l { top: 0; }
.loader__curtain--r { bottom: 0; }

/* ---- 開く演出 ---- */
.loader.is-leaving .loader__curtain--l {
  transform: translateY(-100%);
  transition: transform 0.65s cubic-bezier(0.87, 0, 0.13, 1);
}
.loader.is-leaving .loader__curtain--r {
  transform: translateY(100%);
  transition: transform 0.65s cubic-bezier(0.87, 0, 0.13, 1) 0.04s;
}

/* ---- カーテン境目のフェード ---- */
.loader__curtain--l::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 60px;
  background: linear-gradient(to bottom, transparent, rgba(0,15,30,0.55));
  pointer-events: none;
}
.loader__curtain--r::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 60px;
  background: linear-gradient(to top, transparent, rgba(0,15,30,0.55));
  pointer-events: none;
}

/* ---- 完了後に非表示 ---- */
.loader.is-done {
  visibility: hidden;
  transition: visibility 0s 0.75s;
}

/* ---- 中央ロゴ ---- */
.loader__logo-wrap {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
}

.loader__logo {
  width: clamp(120px, 20vw, 200px);
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.35s ease, transform 0.35s ease;
}
.loader.is-active .loader__logo {
  opacity: 1;
  transform: translateY(0);
}
.loader.is-leaving .loader__logo {
  opacity: 0;
  transform: scale(0.95);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

/* ---- reduced-motion ---- */
@media (prefers-reduced-motion: reduce) {
  .loader__curtain,
  .loader__logo { transition: none; }
}