/* === OPENING ANIMATION ======================================================= */

#opening-overlay {
  position: fixed;
  inset: 0;
  z-index: 9000;
  pointer-events: all;
}

/* ── 背景レイヤー（先に消える） ──────────────────────────────────────────── */
.opening-bg {
  position: absolute;
  inset: 0;
  background-color: #ffffff;
  background-image:
    radial-gradient(70vmax 70vmax at 0% 0%,    rgba(212,99,126,.28) 0%, transparent 60%),
    radial-gradient(66vmax 66vmax at 100% 100%, rgba(26,157,87,.22)  0%, transparent 60%),
    radial-gradient(48vmax 48vmax at 100% 0%,   rgba(212,99,126,.14) 0%, transparent 55%);
  transition: opacity .55s cubic-bezier(.4,0,.2,1);
}

/* グレインテクスチャ（background.css の body::after と同じ） */
.opening-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .07;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='g'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23g)'/%3E%3C/svg%3E");
  background-size: 200px 200px;
  background-repeat: repeat;
}

/* ── コンテンツレイヤー（背景より0.2s遅れて消える） ──────────────────────── */
.opening-content {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 32px;
  transition: opacity .5s cubic-bezier(.4,0,.2,1) .2s;
}

/* ── ディゾルブ ────────────────────────────────────────────────────────────── */
#opening-overlay.dissolve .opening-bg      { opacity: 0; }
#opening-overlay.dissolve .opening-content { opacity: 0; }
#opening-overlay.dissolve                  { pointer-events: none; }

/* ── ロゴ：スケール＋フェードイン ──────────────────────────────────────── */
.opening-logo-img {
  width: clamp(140px, 22vw, 220px);
  height: auto;
  display: block;
  opacity: 0;
  transform: translateY(6px) scale(.94);
  transition:
    opacity  .65s cubic-bezier(.4,0,.2,1),
    transform .65s cubic-bezier(.34,1.56,.64,1);  /* spring easing で着地感 */
}

.opening-logo-img.in {
  opacity: 1;
  transform: translateY(0) scale(1);
}

/* ── ローディングバー ────────────────────────────────────────────────────── */
.opening-bar-wrap {
  width: clamp(140px, 22vw, 220px);
  height: 3px;
  background: rgba(36,48,64,.1);
  border-radius: 9999px;
  overflow: hidden;
  opacity: 0;
  transition: opacity .4s ease .25s;
}

.opening-bar-wrap.in {
  opacity: 1;
}

.opening-bar-fill {
  position: relative;
  height: 100%;
  width: 0%;
  /* ピンク → 濃ピンクのグラデーションで質感アップ */
  background: linear-gradient(90deg, #D4637E 0%, #B84A66 100%);
  border-radius: 9999px;
  overflow: hidden;
}

.opening-bar-fill.run {
  animation: op-progress 2.4s cubic-bezier(.4, 0, .55, 1) forwards;
}

/* shimmer：バーの先端を走る白い光点 */
.opening-bar-fill::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 60%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent   0%,
    rgba(255,255,255,.6) 50%,
    transparent  100%
  );
  transform: translateX(-100%);
}

.opening-bar-fill.run::after {
  animation: op-shimmer 1.1s ease-in-out infinite;
  animation-delay: .5s;
}

@keyframes op-progress {
  0%   { width: 0%; }
  75%  { width: 90%; }
  100% { width: 100%; }
}

@keyframes op-shimmer {
  0%   { transform: translateX(-100%); }
  100% { transform: translateX(250%); }
}

@media (prefers-reduced-motion: reduce) {
  #opening-overlay { display: none !important; }
}