.page-transition {
  position: fixed;
  inset: 0;
  z-index: 99999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s ease, visibility 0.35s ease;
}

.page-transition.is-active {
  opacity: 1;
  visibility: visible;
  pointer-events: all;
}

.page-transition-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(10, 22, 40, 0.55);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.page-transition-stage {
  position: relative;
  width: 100%;
  height: 140px;
  overflow: hidden;
  z-index: 1;
}

.page-transition-track {
  position: absolute;
  top: 50%;
  left: 8%;
  right: 8%;
  height: 2px;
  transform: translateY(-50%);
  background: linear-gradient(
    90deg,
    transparent,
    rgba(66, 165, 245, 0.35) 20%,
    rgba(255, 140, 0, 0.5) 50%,
    rgba(66, 165, 245, 0.35) 80%,
    transparent
  );
  border-radius: 999px;
  opacity: 0;
}

.page-transition.is-active .page-transition-track {
  animation: transition-track-in 0.5s ease forwards;
}

.page-transition-mail {
  position: absolute;
  top: 50%;
  left: -140px;
  width: 120px;
  height: auto;
  transform: translateY(-50%);
  filter: drop-shadow(0 12px 28px rgba(0, 64, 128, 0.35));
  will-change: transform, opacity;
}

.page-transition.is-exiting .page-transition-mail {
  animation: transition-mail-exit 0.9s cubic-bezier(0.45, 0, 0.15, 1) forwards;
}

.page-transition.is-entering .page-transition-mail {
  left: auto;
  right: -140px;
  animation: transition-mail-enter 0.85s cubic-bezier(0.45, 0, 0.15, 1) forwards;
}

.page-transition-mail svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-transition-letter {
  transform-origin: center bottom;
}

.page-transition.is-exiting .page-transition-letter {
  animation: transition-letter-peek 0.9s ease forwards;
}

.page-transition-caption {
  position: relative;
  z-index: 1;
  margin-top: 8px;
  font-family: "Outfit", "DM Sans", sans-serif;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.85);
  opacity: 0;
  transform: translateY(8px);
}

.page-transition.is-active .page-transition-caption {
  animation: transition-caption-in 0.45s ease 0.12s forwards;
}

.page-transition-spark {
  position: absolute;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #ff8c00;
  box-shadow: 0 0 10px rgba(255, 140, 0, 0.8);
  opacity: 0;
}

.page-transition-spark-a {
  top: 42%;
  left: 30%;
}

.page-transition-spark-b {
  top: 58%;
  left: 55%;
}

.page-transition.is-exiting .page-transition-spark {
  animation: transition-spark 0.9s ease forwards;
}

.page-transition-spark-b {
  animation-delay: 0.15s;
}

@keyframes transition-mail-exit {
  0% {
    transform: translateY(-50%) translateX(0) rotate(-6deg) scale(0.92);
    opacity: 0;
  }
  12% {
    opacity: 1;
    transform: translateY(-50%) translateX(12vw) rotate(-2deg) scale(1);
  }
  88% {
    opacity: 1;
    transform: translateY(-50%) translateX(88vw) rotate(4deg) scale(1);
  }
  100% {
    opacity: 0;
    transform: translateY(-50%) translateX(calc(100vw + 160px)) rotate(8deg) scale(0.96);
  }
}

@keyframes transition-mail-enter {
  0% {
    transform: translateY(-50%) translateX(0) rotate(6deg) scale(0.94);
    opacity: 0;
  }
  15% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    transform: translateY(-50%) translateX(calc(-100vw - 160px)) rotate(-8deg) scale(1);
  }
}

@keyframes transition-letter-peek {
  0%, 100% { transform: translateY(0); }
  40%, 60% { transform: translateY(-4px); }
}

@keyframes transition-track-in {
  from { opacity: 0; transform: translateY(-50%) scaleX(0.4); }
  to { opacity: 1; transform: translateY(-50%) scaleX(1); }
}

@keyframes transition-caption-in {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes transition-spark {
  0%, 100% { opacity: 0; transform: scale(0.5); }
  45%, 55% { opacity: 1; transform: scale(1.2); }
}

html.is-page-entering {
  overflow: hidden;
}

@media (prefers-reduced-motion: reduce) {
  .page-transition-mail,
  .page-transition-track,
  .page-transition-caption,
  .page-transition-spark,
  .page-transition-letter {
    animation: none !important;
  }
}