/* ============================================================
   ANIMATIONS & MICRO-INTERACTIONS
   ============================================================ */

/* Page load animation */
.site-wrapper {
  animation: fadeIn 0.3s ease;
}

/* Card hover lift */
.card {
  will-change: transform;
}

/* Nav brand hover */
.nav-brand:hover .nav-brand-mark {
  transform: rotate(-4deg) scale(1.05);
  transition: transform var(--transition-base);
}

.nav-brand-mark {
  transition: transform var(--transition-base);
}

/* Filter chip ripple effect */
.filter-chip {
  position: relative;
  overflow: hidden;
}

.filter-chip::after {
  content: '';
  position: absolute;
  inset: 0;
  background: currentColor;
  opacity: 0;
  transition: opacity var(--transition-fast);
  border-radius: inherit;
}

.filter-chip:active::after {
  opacity: 0.1;
}

/* Button press */
.btn:active:not(:disabled) {
  transform: scale(0.97);
}

/* Sidebar nav hover indicator */
.sidebar-nav-item {
  position: relative;
}

/* Type selector active animation */
.type-selector-btn {
  position: relative;
  overflow: hidden;
  transition: all var(--transition-base);
}

.type-selector-btn.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-accent);
  border-radius: 2px;
}

/* Reaction button pulse on click */
.reaction-btn.reacted {
  color: var(--color-error);
}

.reaction-btn.reacted svg {
  fill: var(--color-error);
  stroke: var(--color-error);
  animation: heartbeat 0.3s ease;
}

@keyframes heartbeat {
  0%   { transform: scale(1); }
  50%  { transform: scale(1.4); }
  100% { transform: scale(1); }
}

/* Toast slide in/out */
.toast {
  animation: slideInRight 0.3s ease;
}

/* Modal fade */
.modal-overlay {
  transition: opacity var(--transition-base), backdrop-filter var(--transition-base);
}

.modal {
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.modal-overlay:not(.open) .modal {
  transform: translateY(24px) scale(0.95);
  opacity: 0;
}

/* Skeleton pulse */
.skeleton-card {
  animation: fadeIn 0.3s ease;
}

/* Feed items stagger */
@keyframes slideInFromBottom {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Infinite scroll spinner */
.load-more-btn.btn-loading {
  position: relative;
}

.load-more-btn.btn-loading::before {
  content: '';
  width: 18px;
  height: 18px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: inline-block;
  margin-right: var(--space-2);
  vertical-align: middle;
}

/* Sidebar overlay fade */
.sidebar-overlay {
  transition: opacity var(--transition-base);
  opacity: 0;
}

.sidebar-overlay.open {
  opacity: 1;
  animation: fadeIn var(--transition-base);
}

/* Nav brand text */
.nav-brand-text {
  display: none;
}

@media (min-width: 640px) {
  .nav-brand-text {
    display: block;
  }
}

/* Password strength bar animation */
.password-strength-fill {
  animation: none;
  transition: width 0.3s ease, background-color 0.3s ease;
}

/* File upload zone drag */
.file-upload-zone.dragging {
  animation: pulse 1s ease infinite;
  border-color: var(--color-accent) !important;
}

/* Hero gradient animation */
@keyframes gradientShift {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* Quick create widget */
.quick-create-widget {
  animation: fadeInUp 0.4s ease 0.2s both;
}

/* Stats stagger */
.stat-widget:nth-child(1) { animation: fadeInUp 0.4s ease 0ms both; }
.stat-widget:nth-child(2) { animation: fadeInUp 0.4s ease 80ms both; }
.stat-widget:nth-child(3) { animation: fadeInUp 0.4s ease 160ms both; }
.stat-widget:nth-child(4) { animation: fadeInUp 0.4s ease 240ms both; }

/* Search focus */
.search-input:focus {
  transform: none;
}

/* Nav link underline */
.nav-link {
  position: relative;
}

/* Announcement card pulse border */
@keyframes announcementGlow {
  0%, 100% { box-shadow: 0 0 0 0 rgba(201, 169, 110, 0); }
  50%       { box-shadow: 0 0 0 4px rgba(201, 169, 110, 0.15); }
}

.announcement-card {
  animation: announcementGlow 3s ease infinite;
}

/* Reduced motion override */
@media (prefers-reduced-motion: reduce) {
  .announcement-card { animation: none; }
  .stat-widget { animation: none; }
  .quick-create-widget { animation: none; }
  .reaction-btn.reacted svg { animation: none; }
  .skeleton { animation: none; background: var(--color-border-light); }
}