/* Animations & Transitions */

/* Gradient Animation */
@keyframes gradient-shift {
  0%, 100% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
}

.animate-gradient {
  animation: gradient-shift 3s ease infinite;
  background-size: 200% 200%;
}

/* Glow Pulse */
@keyframes glow-pulse {
  0%, 100% {
    box-shadow: 0 0 20px var(--glow-color);
  }
  50% {
    box-shadow: 0 0 40px var(--glow-strong);
  }
}

.animate-glow {
  animation: glow-pulse 2s ease-in-out infinite;
}

/* Fade In */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn 0.5s ease-out forwards;
}

/* Stagger animations for grid items */
.post-card:nth-child(1) { animation-delay: 0ms; }
.post-card:nth-child(2) { animation-delay: 100ms; }
.post-card:nth-child(3) { animation-delay: 200ms; }
.post-card:nth-child(4) { animation-delay: 300ms; }
.post-card:nth-child(5) { animation-delay: 400ms; }
.post-card:nth-child(6) { animation-delay: 500ms; }
.post-card:nth-child(7) { animation-delay: 600ms; }
.post-card:nth-child(8) { animation-delay: 700ms; }
.post-card:nth-child(9) { animation-delay: 800ms; }

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

.slide-in-left {
  animation: slideInLeft 0.5s ease-out forwards;
}

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

.slide-in-right {
  animation: slideInRight 0.5s ease-out forwards;
}

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

.scale-in {
  animation: scaleIn 0.3s ease-out forwards;
}

/* Shimmer Effect */
@keyframes shimmer {
  0% {
    background-position: -1000px 0;
  }
  100% {
    background-position: 1000px 0;
  }
}

.shimmer {
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--glow-color) 50%,
    transparent 100%
  );
  background-size: 1000px 100%;
  animation: shimmer 2s infinite;
}

/* Float Animation */
@keyframes float {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-10px);
  }
}

.float {
  animation: float 3s ease-in-out infinite;
}

/* Blur In */
@keyframes blurIn {
  from {
    filter: blur(10px);
    opacity: 0;
  }
  to {
    filter: blur(0);
    opacity: 1;
  }
}

.blur-in {
  animation: blurIn 0.6s ease-out forwards;
}

/* Page Transitions */
.page-transition {
  animation: fadeIn 0.5s ease-out;
}

/* Hover Lift */
.hover-lift {
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.hover-lift:hover {
  transform: translateY(-4px);
}

/* Focus Glow */
*:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 4px;
  box-shadow: 0 0 0 4px var(--glow-color);
  border-radius: var(--radius-sm);
}

/* Smooth Scroll */
html {
  scroll-behavior: smooth;
}

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

  html {
    scroll-behavior: auto;
  }
}

/* Loading State Animation */
@keyframes skeleton-loading {
  0% {
    background-position: -200px 0;
  }
  100% {
    background-position: calc(200px + 100%) 0;
  }
}

.skeleton {
  background: linear-gradient(
    90deg,
    var(--bg-tertiary) 0%,
    var(--bg-hover) 50%,
    var(--bg-tertiary) 100%
  );
  background-size: 200px 100%;
  animation: skeleton-loading 1.5s ease-in-out infinite;
}