/* =========================================
   Page transitions · progress · load shell
   Safer: never leave body permanently faded
   ========================================= */

:root {
  --tx-duration-in: 0.4s;
  --tx-duration-out: 0.28s;
  --tx-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --tx-accent: #f0a35e;
}

/* Soft enter — do NOT force body opacity:0 forever
   (broken JS left text invisible / "CSS not applying") */
html.js-transitions body.is-page-loading {
  /* content still readable under shell */
}

html.js-transitions body.is-page-leaving {
  opacity: 0.35;
  pointer-events: none;
  transition: opacity var(--tx-duration-out) var(--tx-ease);
  filter: saturate(0.7);
}

html.js-transitions body.is-page-ready main,
html.js-transitions body.is-page-ready .wiki-home,
html.js-transitions body.is-page-ready .wiki-layout {
  animation: page-rise var(--tx-duration-in) var(--tx-ease) both;
}

@keyframes page-rise {
  from {
    opacity: 0.55;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* Top progress */
.page-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 10001;
  height: 3px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.page-progress.is-active {
  opacity: 1;
}

.page-progress__bar {
  display: block;
  height: 100%;
  width: 0;
  border-radius: 0 2px 2px 0;
  background: linear-gradient(90deg, #c47a3a, var(--tx-accent), #ffe0b8);
  box-shadow: 0 0 16px rgba(240, 163, 94, 0.65);
  transition: width 0.4s var(--tx-ease);
}

.page-progress.is-loading .page-progress__bar {
  width: 78%;
  transition: width 1.1s var(--tx-ease);
}

.page-progress.is-done .page-progress__bar {
  width: 100%;
  transition: width 0.22s ease-out;
}

/* Full load shell */
.page-loadshell {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 28px;
  padding: 24px;
  background:
    radial-gradient(ellipse 70% 50% at 50% 30%, rgba(240, 163, 94, 0.12), transparent 55%),
    #070708;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.3s var(--tx-ease), visibility 0.3s;
}

.page-loadshell.is-on {
  opacity: 1;
  visibility: visible;
  pointer-events: all;
}

.page-loadshell.is-out {
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s var(--tx-ease), visibility 0.35s;
}

.page-spinner {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 3px solid rgba(255, 255, 255, 0.1);
  border-top-color: var(--tx-accent);
  border-right-color: rgba(240, 163, 94, 0.4);
  animation: page-spin 0.75s linear infinite;
}

@keyframes page-spin {
  to { transform: rotate(360deg); }
}

.page-load-label {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #c4bfb6;
}

.page-skel {
  width: min(360px, 86vw);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-skel__line {
  height: 12px;
  border-radius: 8px;
  background: linear-gradient(
    105deg,
    rgba(255, 255, 255, 0.06) 0%,
    rgba(255, 255, 255, 0.06) 40%,
    rgba(240, 163, 94, 0.28) 50%,
    rgba(255, 255, 255, 0.06) 60%,
    rgba(255, 255, 255, 0.06) 100%
  );
  background-size: 220% 100%;
  animation: page-shimmer 1.2s ease-in-out infinite;
  border: 1px solid rgba(240, 163, 94, 0.12);
}

.page-skel__line.w-40 { width: 40%; }
.page-skel__line.w-60 { width: 60%; }
.page-skel__line.w-80 { width: 80%; }
.page-skel__line.w-100 { width: 100%; }
.page-skel__line.h-lg { height: 18px; }

@keyframes page-shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

html.js-transitions a.is-navigating {
  opacity: 0.65;
  pointer-events: none;
}

.page-veil {
  position: fixed;
  inset: 0;
  z-index: 9998;
  pointer-events: none;
  background: #070708;
  opacity: 0;
  transition: opacity var(--tx-duration-out) var(--tx-ease);
}

.page-veil.is-on {
  opacity: 0.4;
}

@media (prefers-reduced-motion: reduce) {
  html.js-transitions body.is-page-leaving,
  .page-progress__bar,
  .page-loadshell,
  .page-veil,
  .page-spinner,
  .page-skel__line {
    transition: none !important;
    animation: none !important;
  }

  .page-loadshell {
    display: none !important;
  }

  html.js-transitions body.is-page-ready main,
  html.js-transitions body.is-page-ready .wiki-home,
  html.js-transitions body.is-page-ready .wiki-layout {
    animation: none !important;
  }
}