/* ==========================================================================
   KIRAN KODI — SEAMLESS PAGE TRANSITION SYSTEM
   Ultra-smooth, luxury editorial curtain transition with brand emblem
   ========================================================================== */

/* Page Transition Curtain Layer */
.page-transition-curtain {
  position: fixed;
  inset: 0;
  top: 0;
  left: 0;
  width: 100%;
  width: 100vw;
  height: 100%;
  height: 100vh;
  height: 100dvh;
  z-index: 2147483647 !important;
  pointer-events: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: #0d0c0a;
  background: radial-gradient(circle at 50% 50%, #151311 0%, #0a0908 100%);
  transform: translate3d(0, 100%, 0);
  will-change: transform;
  visibility: hidden;
  user-select: none;
  -webkit-user-select: none;
  overflow: hidden;
}

/* Ensure hamburger and mobile panel are strictly invisible during transitions */
html.pt-pending .nav-hamburger,
html.pt-pending .nav-mobile-panel,
html.pt-navigating .nav-hamburger,
html.pt-navigating .nav-mobile-panel,
body.pt-page-exiting .nav-hamburger,
body.pt-page-exiting .nav-mobile-panel,
.page-transition-curtain.pt-entering ~ * .nav-hamburger,
.page-transition-curtain.pt-sweep-up ~ * .nav-hamburger,
.page-transition-curtain.pt-exiting ~ * .nav-hamburger {
  opacity: 0 !important;
  visibility: hidden !important;
  pointer-events: none !important;
  transition: none !important;
}

/* Initial state on page arrival before JS lifts it */
html.pt-pending .page-transition-curtain,
html.pt-navigating .page-transition-curtain,
.page-transition-curtain.pt-entering {
  transform: translate3d(0, 0, 0) !important;
  visibility: visible !important;
  pointer-events: all !important;
}

/* Lift-up sweep animation when entering new page (forward) */
.page-transition-curtain.pt-sweep-up {
  transform: translate3d(0, -100%, 0);
  visibility: visible;
  transition: transform 0.42s cubic-bezier(0.76, 0, 0.24, 1);
}

/* Sweep-down animation when entering new page (go back) */
.page-transition-curtain.pt-sweep-down {
  transform: translate3d(0, 100%, 0);
  visibility: visible;
  transition: transform 0.42s cubic-bezier(0.76, 0, 0.24, 1);
}

/* Sweep-in animation when exiting current page (forward) */
.page-transition-curtain.pt-exiting {
  transform: translate3d(0, 0, 0);
  visibility: visible;
  pointer-events: all;
  transition: transform 0.35s cubic-bezier(0.76, 0, 0.24, 1);
}

/* Sweep-down animation when exiting current page (go back) */
.page-transition-curtain.pt-exiting-back {
  transform: translate3d(0, 0, 0);
  visibility: visible;
  pointer-events: all;
  transition: transform 0.35s cubic-bezier(0.76, 0, 0.24, 1);
}

/* Ambient Accent Glow & Shimmer Horizon Line */
.page-transition-curtain::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent 0%, rgba(255, 120, 60, 0.85) 50%, transparent 100%);
  box-shadow: 0 0 16px rgba(255, 120, 60, 0.5);
  opacity: 0;
  transition: opacity 0.2s ease;
  pointer-events: none;
}

.page-transition-curtain::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent 0%, rgba(255, 120, 60, 0.85) 50%, transparent 100%);
  box-shadow: 0 0 16px rgba(255, 120, 60, 0.5);
  opacity: 0;
  transition: opacity 0.2s ease;
  pointer-events: none;
}

.page-transition-curtain.pt-exiting::before,
.page-transition-curtain.pt-sweep-up::after,
.page-transition-curtain.pt-entering::after {
  opacity: 1;
}

.page-transition-curtain.pt-exiting-back::after,
.page-transition-curtain.pt-sweep-down::before {
  opacity: 1;
}

/* Minimalist Center Emblem */
.page-transition-emblem {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #f2efe9;
  font-family: 'Season Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 0.82rem;
  font-weight: 400;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  opacity: 0;
  transform: scale(0.94) translateY(6px);
  transition: opacity 0.25s ease, transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: none;
}

.page-transition-curtain.pt-exiting .page-transition-emblem,
.page-transition-curtain.pt-exiting-back .page-transition-emblem,
.page-transition-curtain.pt-entering .page-transition-emblem {
  opacity: 1;
  transform: scale(1) translateY(0);
}

.page-transition-curtain.pt-sweep-up .page-transition-emblem {
  opacity: 0;
  transform: scale(1.04) translateY(-10px);
  transition: opacity 0.22s ease, transform 0.3s ease;
}

.page-transition-curtain.pt-sweep-down .page-transition-emblem {
  opacity: 0;
  transform: scale(1.04) translateY(10px);
  transition: opacity 0.22s ease, transform 0.3s ease;
}

.page-transition-star {
  color: #ff783c;
  font-size: 1.05rem;
  line-height: 1;
  display: inline-block;
  animation: ptSpin 12s linear infinite;
}

@keyframes ptSpin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Page Body Micro-Transitions */
body.pt-page-exiting,
body.pt-page-exiting-back {
  overflow: hidden !important;
}

body.pt-page-exiting > *:not(.page-transition-curtain):not(#customCursor):not(#cursorFollower):not(.branding-nav):not(.project-header-nav):not(.hero-nav) {
  opacity: 0.88;
  transform: translateY(-8px);
  transition: opacity 0.35s ease, transform 0.35s cubic-bezier(0.76, 0, 0.24, 1);
}

body.pt-page-exiting-back > *:not(.page-transition-curtain):not(#customCursor):not(#cursorFollower):not(.branding-nav):not(.project-header-nav):not(.hero-nav) {
  opacity: 0.88;
  transform: translateY(8px);
  transition: opacity 0.35s ease, transform 0.35s cubic-bezier(0.76, 0, 0.24, 1);
}

/* Ensure Custom Cursor is always above transition curtain */
.custom-cursor {
  z-index: 999999 !important;
}

.custom-cursor-follower {
  z-index: 999998 !important;
}

/* Reduced Motion Fallback */
@media (prefers-reduced-motion: reduce) {
  .page-transition-curtain {
    transition: opacity 0.25s ease !important;
    transform: none !important;
  }
  .page-transition-curtain.pt-sweep-up,
  .page-transition-curtain.pt-sweep-down {
    opacity: 0 !important;
    visibility: hidden !important;
  }
  .page-transition-curtain.pt-exiting,
  .page-transition-curtain.pt-exiting-back {
    opacity: 1 !important;
    visibility: visible !important;
  }
  .page-transition-star {
    animation: none !important;
  }
}