/* ========================================
   Transitions System - Fade + Slide Effects
   ======================================== */

/* Page transition container */
main {
  position: relative;
  overflow: hidden;
}

/* Fade + Slide In (page entry) */
@keyframes fadeSlideInRight {
  from {
    opacity: 0;
    transform: translateX(20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Fade + Slide Out (page exit) */
@keyframes fadeSlideOutLeft {
  from {
    opacity: 1;
    transform: translateX(0);
  }
  to {
    opacity: 0;
    transform: translateX(-20px);
  }
}

/* Fade + Slide Left (section change) */
@keyframes fadeSlideInLeft {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Scale + Fade (modal/dialog entry) */
@keyframes fadeScaleIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* Scale + Fade (modal/dialog exit) */
@keyframes fadeScaleOut {
  from {
    opacity: 1;
    transform: scale(1);
  }
  to {
    opacity: 0;
    transform: scale(0.95);
  }
}

/* Pure fade (tab changes, overlays) */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes fadeOut {
  from {
    opacity: 1;
  }
  to {
    opacity: 0;
  }
}

/* ========================================
   Transition Classes
   ======================================== */

/* Page entry animation */
body.page-transition main {
  animation: fadeSlideInRight 0.35s cubic-bezier(0.32, 0.72, 0.3, 1) forwards;
}

/* Page exit animation (when leaving) */
body.page-exit main {
  animation: fadeSlideOutLeft 0.25s cubic-bezier(0.4, 0, 1, 1) forwards;
}

/* Navigation transition */
.nav-transition {
  animation: fadeSlideInLeft 0.3s cubic-bezier(0.32, 0.72, 0.3, 1) forwards;
}

/* Modal/Dialog transitions */
[role="dialog"],
.modal,
[data-modal] {
  animation: fadeScaleIn 0.25s cubic-bezier(0.32, 0.72, 0.3, 1) forwards;
}

[role="dialog"].modal-exit,
.modal.modal-exit,
[data-modal].modal-exit {
  animation: fadeScaleOut 0.2s cubic-bezier(0.4, 0, 1, 1) forwards;
}

/* Tab content transitions */
[role="tabpanel"],
.tab-content {
  animation: fadeIn 0.2s ease-in-out forwards;
}

.tab-content.hidden {
  animation: fadeOut 0.15s ease-in-out forwards;
}

/* Card list staggered animation */
.card-list-item {
  animation: fadeSlideInRight 0.4s cubic-bezier(0.32, 0.72, 0.3, 1) forwards;
}

.card-list-item:nth-child(1) { animation-delay: 0.05s; }
.card-list-item:nth-child(2) { animation-delay: 0.1s; }
.card-list-item:nth-child(3) { animation-delay: 0.15s; }
.card-list-item:nth-child(4) { animation-delay: 0.2s; }
.card-list-item:nth-child(5) { animation-delay: 0.25s; }

/* Smooth transitions for all interactive elements */
button,
a,
input,
select,
textarea {
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Prevent transition on load */
* {
  transition-duration: 0s;
}

body.transitions-enabled * {
  transition-duration: inherit;
}

/* Performance optimization: use will-change sparingly */
.page-transition-root {
  will-change: opacity, transform;
}

/* Ensure smooth scrolling */
html {
  scroll-behavior: smooth;
}

/* ========================================
   Responsive Transitions
   ======================================== */

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ========================================
   Utility Classes for Manual Transitions
   ======================================== */

.transition-fade {
  transition: opacity 0.3s ease-in-out;
}

.transition-slide {
  transition: transform 0.3s cubic-bezier(0.32, 0.72, 0.3, 1);
}

.transition-all {
  transition: all 0.3s cubic-bezier(0.32, 0.72, 0.3, 1);
}

.transition-colors {
  transition: background-color, color, border-color 0.2s ease-in-out;
}

/* ========================================
   Stagger Animation
   ======================================== */

.stagger-children > * {
  animation: fadeSlideInRight 0.4s cubic-bezier(0.32, 0.72, 0.3, 1) backwards;
}

.stagger-children > :nth-child(1) { animation-delay: 0.05s; }
.stagger-children > :nth-child(2) { animation-delay: 0.1s; }
.stagger-children > :nth-child(3) { animation-delay: 0.15s; }
.stagger-children > :nth-child(4) { animation-delay: 0.2s; }
.stagger-children > :nth-child(5) { animation-delay: 0.25s; }
.stagger-children > :nth-child(6) { animation-delay: 0.3s; }
.stagger-children > :nth-child(n+7) { animation-delay: 0.35s; }