/* =============================================================================
   ANIMATIONS & KEYFRAMES - NATHPERSONAL REDESIGN
   ============================================================================= */

@import url('./variables.css');

/* ============================================================================= */
/* KEYFRAME ANIMATIONS */
/* ============================================================================= */

/* Fade In - Simple opacity animation */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* Fade In Up - Slide up while fading in */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Fade In Down - Slide down while fading in */
@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Slide In Left - Slide from left side */
@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Slide In Right - Slide from right side */
@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Scale In - Grow from center while fading in */
@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* Pulse - Gentle pulsing scale effect */
@keyframes pulse {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
  100% {
    transform: scale(1);
  }
}

/* ============================================================================= */
/* ANIMATION UTILITY CLASSES */
/* ============================================================================= */

/* Fade In Animation */
.fade-in {
  animation: fadeIn var(--transition-base);
}

/* Fade In Up Animation */
.fade-in-up {
  animation: fadeInUp var(--transition-base);
}

/* Fade In Down Animation */
.fade-in-down {
  animation: fadeInDown var(--transition-base);
}

/* Slide In Left Animation */
.slide-in-left {
  animation: slideInLeft var(--transition-base);
}

/* Slide In Right Animation */
.slide-in-right {
  animation: slideInRight var(--transition-base);
}

/* Scale In Animation */
.scale-in {
  animation: scaleIn var(--transition-base);
}

/* Pulse Animation (continuous) */
.pulse {
  animation: pulse var(--transition-slow) infinite;
}

/* ============================================================================= */
/* STAGGER ANIMATIONS - Cascading delays for nth-child elements */
/* ============================================================================= */

/* Staggered Fade In Up */
.fade-in-up-stagger > :nth-child(1) {
  animation-delay: 0ms;
}
.fade-in-up-stagger > :nth-child(2) {
  animation-delay: 100ms;
}
.fade-in-up-stagger > :nth-child(3) {
  animation-delay: 200ms;
}
.fade-in-up-stagger > :nth-child(4) {
  animation-delay: 300ms;
}
.fade-in-up-stagger > :nth-child(5) {
  animation-delay: 400ms;
}
.fade-in-up-stagger > :nth-child(6) {
  animation-delay: 500ms;
}

/* Apply animation to all children */
.fade-in-up-stagger > * {
  animation: fadeInUp var(--transition-base);
}

/* Staggered Fade In */
.fade-in-stagger > :nth-child(1) {
  animation-delay: 0ms;
}
.fade-in-stagger > :nth-child(2) {
  animation-delay: 100ms;
}
.fade-in-stagger > :nth-child(3) {
  animation-delay: 200ms;
}
.fade-in-stagger > :nth-child(4) {
  animation-delay: 300ms;
}
.fade-in-stagger > :nth-child(5) {
  animation-delay: 400ms;
}
.fade-in-stagger > :nth-child(6) {
  animation-delay: 500ms;
}

/* Apply animation to all children */
.fade-in-stagger > * {
  animation: fadeIn var(--transition-base);
}

/* Staggered Scale In */
.scale-in-stagger > :nth-child(1) {
  animation-delay: 0ms;
}
.scale-in-stagger > :nth-child(2) {
  animation-delay: 100ms;
}
.scale-in-stagger > :nth-child(3) {
  animation-delay: 200ms;
}
.scale-in-stagger > :nth-child(4) {
  animation-delay: 300ms;
}
.scale-in-stagger > :nth-child(5) {
  animation-delay: 400ms;
}
.scale-in-stagger > :nth-child(6) {
  animation-delay: 500ms;
}

/* Apply animation to all children */
.scale-in-stagger > * {
  animation: scaleIn var(--transition-base);
}

/* ============================================================================= */
/* SCROLL OBSERVER CLASSES - Triggered by IntersectionObserver .visible class */
/* ============================================================================= */

/* Observe Fade In - Starts hidden, animates on visibility */
.observe-fade-in {
  opacity: 0;
  transition: opacity var(--transition-base);
}

.observe-fade-in.visible {
  animation: fadeIn var(--transition-base) forwards;
}

/* Observe Fade In Up - Starts hidden and translated, animates on visibility */
.observe-fade-in-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition-base), transform var(--transition-base);
}

.observe-fade-in-up.visible {
  animation: fadeInUp var(--transition-base) forwards;
}

/* Observe Scale In - Starts hidden and scaled, animates on visibility */
.observe-scale-in {
  opacity: 0;
  transform: scale(0.95);
  transition: opacity var(--transition-base), transform var(--transition-base);
}

.observe-scale-in.visible {
  animation: scaleIn var(--transition-base) forwards;
}

/* ============================================================================= */
/* ACCESSIBILITY - Respect prefers-reduced-motion */
/* ============================================================================= */

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

  /* Override specific animation classes */
  .fade-in,
  .fade-in-up,
  .fade-in-down,
  .slide-in-left,
  .slide-in-right,
  .scale-in,
  .pulse,
  .fade-in-up-stagger > *,
  .fade-in-stagger > *,
  .scale-in-stagger > *,
  .observe-fade-in.visible,
  .observe-fade-in-up.visible,
  .observe-scale-in.visible {
    animation: none !important;
    transition: none !important;
  }

  /* Ensure scroll observer classes are immediately visible */
  .observe-fade-in,
  .observe-fade-in-up,
  .observe-scale-in {
    opacity: 1 !important;
    transform: none !important;
  }
}

/* ============================================================================= */
/* HIGH CONTRAST MODE - Enhance animations for better visibility */
/* ============================================================================= */

@media (prefers-contrast: more) {
  /* Increase animation impact in high contrast mode */
  @keyframes fadeInUp {
    from {
      opacity: 0;
      transform: translateY(30px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  @keyframes fadeInDown {
    from {
      opacity: 0;
      transform: translateY(-30px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  @keyframes slideInLeft {
    from {
      opacity: 0;
      transform: translateX(-40px);
    }
    to {
      opacity: 1;
      transform: translateX(0);
    }
  }

  @keyframes slideInRight {
    from {
      opacity: 0;
      transform: translateX(40px);
    }
    to {
      opacity: 1;
      transform: translateX(0);
    }
  }

  @keyframes scaleIn {
    from {
      opacity: 0;
      transform: scale(0.9);
    }
    to {
      opacity: 1;
      transform: scale(1);
    }
  }

  @keyframes pulse {
    0% {
      transform: scale(1);
    }
    50% {
      transform: scale(1.1);
    }
    100% {
      transform: scale(1);
    }
  }
}