.page-transition {
  position: fixed;
  inset: 0;
  z-index: 9999;
  overflow: hidden;
  pointer-events: none;
  visibility: hidden;
}

.page-transition__wing {
  position: absolute;
  top: -4%;
  bottom: -4%;
  width: 58%;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, .04), transparent 38%),
    #6f0b16;
  will-change: transform;
}

.page-transition__wing--left {
  left: -2%;
  clip-path: polygon(0 0, 92% 0, 100% 12%, 94% 28%, 100% 45%, 93% 62%, 100% 80%, 94% 100%, 0 100%);
  transform: translateX(-112%);
}

.page-transition__wing--right {
  right: -2%;
  clip-path: polygon(8% 0, 100% 0, 100% 100%, 6% 100%, 0 80%, 7% 62%, 0 45%, 6% 28%, 0 12%);
  transform: translateX(112%);
}

.page-transition__seam {
  position: absolute;
  top: 7%;
  bottom: 7%;
  left: 50%;
  width: 3px;
  border-radius: 999px;
  background: #f2b52b;
  box-shadow: 0 0 22px rgba(242, 181, 43, .42);
  opacity: 0;
  transform: scaleY(.12);
  transform-origin: center;
}

.page-transition__mark {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 92px;
  height: 92px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: #f2b52b;
  box-shadow: 0 18px 46px rgba(35, 0, 4, .32);
  opacity: 0;
  transform: translate(-50%, -50%) scale(.72);
}

.page-transition__mark img {
  width: 78px;
  height: 58px;
  object-fit: contain;
}

body.is-page-leaving .page-transition,
body.is-page-entering .page-transition {
  visibility: visible;
}

body.is-page-leaving .page-transition__wing--left {
  animation: wing-cover-left 420ms cubic-bezier(.16, 1, .3, 1) both;
}

body.is-page-leaving .page-transition__wing--right {
  animation: wing-cover-right 420ms cubic-bezier(.16, 1, .3, 1) both;
}

body.is-page-leaving .page-transition__seam {
  animation: seam-meet 150ms 245ms cubic-bezier(.16, 1, .3, 1) both;
}

body.is-page-leaving .page-transition__mark {
  animation: mark-meet 135ms 270ms cubic-bezier(.16, 1, .3, 1) both;
}

body.is-page-entering .page-transition__wing--left {
  animation: wing-reveal-left 560ms cubic-bezier(.16, 1, .3, 1) both;
}

body.is-page-entering .page-transition__wing--right {
  animation: wing-reveal-right 560ms cubic-bezier(.16, 1, .3, 1) both;
}

body.is-page-entering .page-transition__seam {
  animation: seam-release 300ms cubic-bezier(.4, 0, 1, 1) both;
}

body.is-page-entering .page-transition__mark {
  animation: mark-release 260ms cubic-bezier(.4, 0, 1, 1) both;
}

@keyframes wing-cover-left {
  from { transform: translateX(-112%); }
  to { transform: translateX(0); }
}

@keyframes wing-cover-right {
  from { transform: translateX(112%); }
  to { transform: translateX(0); }
}

@keyframes wing-reveal-left {
  from { transform: translateX(0); }
  to { transform: translateX(-112%); }
}

@keyframes wing-reveal-right {
  from { transform: translateX(0); }
  to { transform: translateX(112%); }
}

@keyframes seam-meet {
  from { opacity: 0; transform: scaleY(.12); }
  to { opacity: 1; transform: scaleY(1); }
}

@keyframes seam-release {
  from { opacity: 1; transform: scaleY(1); }
  to { opacity: 0; transform: scaleY(.2); }
}

@keyframes mark-meet {
  from { opacity: 0; transform: translate(-50%, -50%) scale(.72); }
  to { opacity: 1; transform: translate(-50%, -50%) scale(1); }
}

@keyframes mark-release {
  from { opacity: 1; transform: translate(-50%, -50%) scale(1); }
  to { opacity: 0; transform: translate(-50%, -50%) scale(.86); }
}

@media (prefers-reduced-motion: reduce) {
  .page-transition__wing,
  .page-transition__seam,
  .page-transition__mark {
    display: none;
  }

  body.is-page-leaving .page-transition {
    background: #6f0b16;
    animation: page-fade-cover 120ms ease-out both;
  }

  body.is-page-entering .page-transition {
    background: #6f0b16;
    animation: page-fade-release 140ms ease-out both;
  }
}

@keyframes page-fade-cover {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes page-fade-release {
  from { opacity: 1; }
  to { opacity: 0; }
}