/**
 * Page Transitions & Scroll Reveal
 * Clean, non-blocking approach: content is visible by default,
 * [data-reveal] elements opt-in to scroll animations.
 */

/* ========================================
   Page Transition Overlay
   ======================================== */
.page-transition {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-primary, #0a0a0f);
  z-index: 99999;
  pointer-events: none;
  opacity: 1;
  transition: opacity 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.page-transition.fade-out {
  opacity: 0;
}

.page-transition.navigating .page-transition-spinner {
  opacity: 1;
}

.page-transition-spinner {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 40px;
  height: 40px;
  border: 3px solid rgba(99, 102, 241, 0.2);
  border-top-color: var(--accent, #6366f1);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  opacity: 0;
  transition: opacity 0.2s ease;
}

@keyframes spin {
  to { transform: translate(-50%, -50%) rotate(360deg); }
}


/* ========================================
   Scroll Reveal Animations
   Only elements with [data-reveal] are hidden initially.
   Everything else stays visible at all times.
   ======================================== */
[data-reveal] {
  opacity: 0;
  transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.6s cubic-bezier(0.4, 0, 0.2, 1),
              filter 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Revealed state */
[data-reveal].revealed {
  opacity: 1 !important;
  transform: none !important;
  filter: none !important;
}

/* Direction variants */
[data-reveal="up"],
[data-reveal] {
  transform: translateY(40px);
}

[data-reveal="down"] {
  transform: translateY(-40px);
}

[data-reveal="left"] {
  transform: translateX(-40px);
}

[data-reveal="right"] {
  transform: translateX(40px);
}

[data-reveal="scale"] {
  transform: scale(0.9);
}

[data-reveal="scale-up"] {
  transform: scale(0.8) translateY(20px);
}

[data-reveal="fade"] {
  transform: none;
}

[data-reveal="blur"] {
  transform: translateY(20px);
  filter: blur(10px);
}

[data-reveal="rotate"] {
  transform: translateY(30px) rotate(-3deg);
}

/* Mobile: reduce horizontal offsets to prevent overflow */
@media (max-width: 968px) {
  [data-reveal="left"],
  [data-reveal="right"] {
    transform: translateY(30px);
  }
}


/* ========================================
   Staggered Children Reveal
   ======================================== */
[data-reveal-stagger] > * {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.5s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-reveal-stagger].revealed > * {
  opacity: 1;
  transform: translateY(0);
}

[data-reveal-stagger].revealed > *:nth-child(1) { transition-delay: 0.05s; }
[data-reveal-stagger].revealed > *:nth-child(2) { transition-delay: 0.1s; }
[data-reveal-stagger].revealed > *:nth-child(3) { transition-delay: 0.15s; }
[data-reveal-stagger].revealed > *:nth-child(4) { transition-delay: 0.2s; }
[data-reveal-stagger].revealed > *:nth-child(5) { transition-delay: 0.25s; }
[data-reveal-stagger].revealed > *:nth-child(6) { transition-delay: 0.3s; }
[data-reveal-stagger].revealed > *:nth-child(7) { transition-delay: 0.35s; }
[data-reveal-stagger].revealed > *:nth-child(8) { transition-delay: 0.4s; }
[data-reveal-stagger].revealed > *:nth-child(9) { transition-delay: 0.45s; }
[data-reveal-stagger].revealed > *:nth-child(10) { transition-delay: 0.5s; }
[data-reveal-stagger].revealed > *:nth-child(n + 11) { transition-delay: 0.55s; }


/* ========================================
   Delay / Duration Modifiers
   ======================================== */
[data-reveal-delay="100"] { transition-delay: 0.1s !important; }
[data-reveal-delay="200"] { transition-delay: 0.2s !important; }
[data-reveal-delay="300"] { transition-delay: 0.3s !important; }
[data-reveal-delay="400"] { transition-delay: 0.4s !important; }
[data-reveal-delay="500"] { transition-delay: 0.5s !important; }
[data-reveal-delay="600"] { transition-delay: 0.6s !important; }
[data-reveal-delay="700"] { transition-delay: 0.7s !important; }
[data-reveal-delay="800"] { transition-delay: 0.8s !important; }

[data-reveal-duration="fast"]   { transition-duration: 0.3s !important; }
[data-reveal-duration="slow"]   { transition-duration: 0.9s !important; }
[data-reveal-duration="slower"] { transition-duration: 1.2s !important; }


/* ========================================
   Bidirectional Reveal (hide on scroll out)
   ======================================== */
[data-reveal-hide].hidden {
  opacity: 0;
}
[data-reveal-hide][data-reveal="up"].hidden,
[data-reveal-hide].hidden {
  transform: translateY(40px);
}
[data-reveal-hide][data-reveal="down"].hidden {
  transform: translateY(-40px);
}
[data-reveal-hide][data-reveal="left"].hidden {
  transform: translateX(-40px);
}
[data-reveal-hide][data-reveal="right"].hidden {
  transform: translateX(40px);
}


/* ========================================
   Accessibility
   ======================================== */
@media (prefers-reduced-motion: reduce) {
  .page-transition,
  [data-reveal],
  [data-reveal-stagger] > * {
    transition: none !important;
    transform: none !important;
    opacity: 1 !important;
    filter: none !important;
    animation: none !important;
  }
}