plane/apps/dev-wiki/styles/animations.css

/* Comment animations */
@keyframes stagger-comments {
  0% {
    opacity: 0;
    transform: translateY(10px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes expand-reply {
  0% {
    opacity: 0;
    max-height: 0;
    transform: translateY(-5px);
  }
  100% {
    opacity: 1;
    max-height: 500px;
    transform: translateY(0);
  }
}

@keyframes expand {
  0% {
    opacity: 0;
    max-height: 0;
  }
  100% {
    opacity: 1;
    max-height: 1000px;
  }
}

@keyframes expand-action {
  0% {
    opacity: 0;
    transform: scale(0.95);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes expand-down {
  0% {
    opacity: 0;
    max-height: 0;
    transform: translateY(-10px);
  }
  100% {
    opacity: 1;
    max-height: 500px;
    transform: translateY(0);
  }
}

@keyframes scale-line {
  0% {
    transform: scaleX(0);
    opacity: 0;
  }
  100% {
    transform: scaleX(1);
    opacity: 1;
  }
}

@keyframes button-fade-up {
  0% {
    opacity: 0;
    transform: translateY(5px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fade-in-up {
  0% {
    opacity: 0;
    transform: translateY(10px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Animation classes */
.animate-stagger-comments > * {
  animation: stagger-comments 0.25s var(--ease-out-cubic) forwards;
}

.animate-stagger-comments > *:nth-child(1) {
  animation-delay: 0ms;
}
.animate-stagger-comments > *:nth-child(2) {
  animation-delay: 50ms;
}
.animate-stagger-comments > *:nth-child(3) {
  animation-delay: 100ms;
}
.animate-stagger-comments > *:nth-child(4) {
  animation-delay: 150ms;
}
.animate-stagger-comments > *:nth-child(5) {
  animation-delay: 200ms;
}
.animate-stagger-comments > *:nth-child(n + 6) {
  animation-delay: 250ms;
}

/* Smooth filtering animation - no delays to prevent jitter */
.animate-smooth-comments > * {
  animation: stagger-comments 0.2s var(--ease-out-cubic) forwards;
}

/* Subtle transition for comment items during filtering */
.animate-comment-item {
  transition: all 0.15s var(--ease-out-cubic);
}

.animate-expand-reply {
  animation: expand-reply 0.3s var(--ease-out-cubic) forwards;
}

.animate-expand {
  animation: expand 0.25s var(--ease-out-quad) forwards;
}

.animate-expand-action {
  animation: expand-action 0.2s var(--ease-out-quad) forwards;
}

.animate-expand-down {
  animation: expand-down 0.3s var(--ease-out-cubic) forwards;
}

.animate-scale-line {
  animation: scale-line 0.3s var(--ease-out-quad) forwards;
  transform-origin: center;
}

.animate-button-fade-up {
  animation: button-fade-up 0.25s var(--ease-out-cubic) forwards;
}

.animate-fade-in-up {
  animation: fade-in-up 0.3s var(--ease-out-cubic) forwards;
}

/* Smooth filtering animations */
.animate-comment-filter {
  transition: all 0.2s var(--ease-out-cubic);
}

.animate-comment-filter.entering {
  opacity: 0;
  transform: translateY(-10px);
}

.animate-comment-filter.entered {
  opacity: 1;
  transform: translateY(0);
}

.animate-comment-filter.exiting {
  opacity: 0;
  transform: translateY(10px);
  max-height: 0;
  margin-bottom: 0;
  padding-top: 0;
  padding-bottom: 0;
}

/* Accessibility: Disable animations for users who prefer reduced motion */
@media (prefers-reduced-motion: reduce) {
  .animate-stagger-comments > *,
  .animate-smooth-comments > *,
  .animate-expand-reply,
  .animate-expand,
  .animate-expand-action,
  .animate-expand-down,
  .animate-scale-line,
  .animate-button-fade-up,
  .animate-fade-in-up,
  .animate-comment-filter,
  .animate-comment-item {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
    max-height: none !important;
  }
}