/* ==========================================================================
   PAGE-TURN TRANSITIONS & EDITION LOADER
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. EDITION LOADER — 0.3s "Opening a Fresh Newspaper" Sequence
   -------------------------------------------------------------------------- */
.edition-loader {
  position: fixed;
  inset: 0;
  z-index: 10000;
  background-color: var(--paper-warm);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  opacity: 1;
  transition: opacity 200ms ease;
  pointer-events: all;
}

.edition-loader.hiding {
  opacity: 0;
  pointer-events: none;
}

.edition-loader.hidden {
  display: none;
}

.loader-masthead {
  font-family: var(--font-serif);
  font-size: clamp(2.4rem, 6vw, 4.8rem);
  font-weight: 900;
  text-transform: uppercase;
  color: var(--ink-black);
  letter-spacing: -0.01em;
  line-height: 0.92;
  opacity: 0;
  transform: translateY(8px);
  animation: loaderReveal 200ms 50ms var(--ease-editorial) forwards;
}

.loader-subtitle {
  font-family: var(--font-condensed);
  font-size: clamp(11px, 1.4vw, 14px);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-muted);
  opacity: 0;
  transform: translateY(4px);
  animation: loaderReveal 200ms 150ms var(--ease-editorial) forwards;
}

.loader-rule {
  width: 60px;
  height: 1px;
  background-color: var(--ink-black);
  margin-top: 4px;
  opacity: 0;
  transform: scaleX(0);
  animation: loaderRuleReveal 150ms 100ms var(--ease-editorial) forwards;
}

@keyframes loaderReveal {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes loaderRuleReveal {
  to {
    opacity: 1;
    transform: scaleX(1);
  }
}

/* --------------------------------------------------------------------------
   2. 3D PAPER PAGE-TURN ENGINE
   -------------------------------------------------------------------------- */

/* The publication wrapper provides 3D perspective */
.page-turn-perspective {
  perspective: 2000px;
  perspective-origin: center center;
  position: relative;
  overflow: hidden;
}

/* Each newspaper page is a 3D-transformable sheet */
.newspaper-page {
  /* Adjust transition duration and cubic-bezier for a smoother, slightly slower turn */
  transition: transform 900ms cubic-bezier(0.25, 1, 0.5, 1), opacity 900ms ease, box-shadow 900ms ease;
  transform-style: preserve-3d;
  backface-visibility: hidden;
  will-change: transform, opacity;
  transform-origin: left center;
}

/* --- Entering page (coming into view) --- */
.newspaper-page.page-enter {
  display: block !important;
  animation: pageTurnIn var(--duration-page-turn) var(--ease-page-turn) forwards;
}

/* --- Exiting page (turning away) --- */
.newspaper-page.page-exit {
  display: block !important;
  animation: pageTurnOut var(--duration-page-turn) var(--ease-page-turn) forwards;
}

@keyframes pageTurnOut {
  0% {
    transform: rotateY(0deg);
    opacity: 1;
    filter: brightness(1);
  }
  40% {
    transform: rotateY(-35deg) scale(0.97);
    opacity: 0.85;
    filter: brightness(0.92);
  }
  100% {
    transform: rotateY(-90deg) scale(0.94);
    opacity: 0;
    filter: brightness(0.8);
  }
}

@keyframes pageTurnIn {
  0% {
    transform: rotateY(90deg) scale(0.94);
    opacity: 0;
    filter: brightness(0.8);
  }
  60% {
    transform: rotateY(20deg) scale(0.98);
    opacity: 0.9;
    filter: brightness(0.95);
  }
  100% {
    transform: rotateY(0deg) scale(1);
    opacity: 1;
    filter: brightness(1);
  }
}

/* Paper fold shadow overlay */
.newspaper-page.page-exit::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 40%;
  height: 100%;
  background: linear-gradient(
    to left,
    rgba(0, 0, 0, 0.08) 0%,
    transparent 100%
  );
  pointer-events: none;
  animation: foldShadow var(--duration-page-turn) var(--ease-page-turn) forwards;
}

@keyframes foldShadow {
  0% {
    opacity: 0;
    width: 0%;
  }
  50% {
    opacity: 1;
    width: 40%;
  }
  100% {
    opacity: 0;
    width: 0%;
  }
}

/* --------------------------------------------------------------------------
   3. REDUCED MOTION FALLBACK
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  .edition-loader {
    transition: none;
  }

  .loader-masthead,
  .loader-subtitle {
    animation: none;
    opacity: 1;
    transform: none;
  }

  .loader-rule {
    animation: none;
    opacity: 1;
    transform: none;
  }

  .newspaper-page.page-enter {
    animation: simpleFadeIn 200ms ease forwards;
  }

  .newspaper-page.page-exit {
    animation: simpleFadeOut 200ms ease forwards;
  }

  .newspaper-page.page-exit::after {
    display: none;
  }

  @keyframes simpleFadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
  }

  @keyframes simpleFadeOut {
    from { opacity: 1; }
    to { opacity: 0; }
  }
}