/* ================================================================
   LOADER — ローディング画面のスタイル
   ================================================================ */
#loader {
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: #fff;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

/* Brand outro screen */
#loader-brand {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: #fff;
  opacity: 0;
  transition: opacity 0.4s ease;
  z-index: 5;
}
#loader-brand.show { opacity: 1; }
#loader-brand.fade-out { opacity: 0; transition: opacity 0.4s ease; }

#loader-brand-logo {
  font-family: var(--font-display);
  font-size: clamp(36px, 6vw, 72px);
  font-weight: 300;
  letter-spacing: 0.18em;
  color: #1a1a1a;
  margin-bottom: 16px;
  background: transparent;
  padding: 30px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 120px;
  transform: scale(0.9);
  opacity: 0;
  transition: transform 0.4s ease, opacity 0.4s ease;
}
#loader-brand.show #loader-brand-logo {
  transform: scale(1);
  opacity: 1;
}
#loader-brand.fade-out #loader-brand-logo {
  transform: scale(0.95);
  opacity: 0;
}
#loader-brand-logo span { color: var(--color-accent); }

#loader-brand-line {
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: width 0.4s ease 0.15s, opacity 0.4s ease 0.15s;
  opacity: 0;
}
#loader-brand.show #loader-brand-line { width: 120px; opacity: 1; }
#loader-brand.fade-out #loader-brand-line { width: 0; opacity: 0; }

#loader-brand-sub {
  font-size: 11px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: rgba(26,26,26,0.5);
  margin-top: 16px;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.4s ease 0.25s, transform 0.4s ease 0.25s;
}
#loader-brand.show #loader-brand-sub { opacity: 1; transform: translateY(0); }
#loader-brand.fade-out #loader-brand-sub { opacity: 0; transform: translateY(-10px); }

/* Loading progress bar */
#loader-progress {
  position: absolute;
  bottom: 0; left: 0;
  height: 2px;
  background: var(--color-accent);
  width: 0%;
  transition: width 0.05s linear;
  z-index: 6;
}

/* Loader fade-out */
#loader.hide {
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}