/* ============================================
   IdeaForge — Animations
   ============================================ */

/* ---------- Keyframes ---------- */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInLeft {
  from { opacity: 0; transform: translateX(-20px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes fadeInRight {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: translateX(0); }
}

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

@keyframes slideInRight {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

@keyframes slideOutRight {
  from { transform: translateX(0); opacity: 1; }
  to { transform: translateX(100%); opacity: 0; }
}

@keyframes slideInUp {
  from { transform: translateY(100%); }
  to { transform: translateY(0); }
}

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

@keyframes scaleInBounce {
  0% { opacity: 0; transform: scale(0.5); }
  70% { transform: scale(1.05); }
  100% { opacity: 1; transform: scale(1); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

@keyframes glow {
  0%, 100% { box-shadow: 0 0 20px var(--primary-alpha-20); }
  50% { box-shadow: 0 0 40px var(--primary-alpha-30), 0 0 60px var(--accent-alpha-20); }
}

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

@keyframes typeWriter {
  from { width: 0; }
  to { width: 100%; }
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

@keyframes ripple {
  to { transform: scale(4); opacity: 0; }
}

@keyframes confettiDrop {
  0% { transform: translateY(-100vh) rotate(0deg); opacity: 1; }
  100% { transform: translateY(100vh) rotate(720deg); opacity: 0; }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  10%, 30%, 50%, 70%, 90% { transform: translateX(-4px); }
  20%, 40%, 60%, 80% { transform: translateX(4px); }
}

@keyframes dotPulse {
  0%, 80%, 100% { transform: scale(0); opacity: 0.5; }
  40% { transform: scale(1); opacity: 1; }
}

/* ---------- Animation Classes ---------- */
.anim-fade-in {
  animation: fadeIn var(--transition-base) forwards;
}

.anim-fade-in-up {
  animation: fadeInUp var(--transition-slow) forwards;
}

.anim-fade-in-down {
  animation: fadeInDown var(--transition-slow) forwards;
}

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

.anim-slide-in-right {
  animation: slideInRight var(--transition-slow) forwards;
}

.anim-slide-in-up {
  animation: slideInUp var(--transition-slow) forwards;
}

/* Staggered animation for lists */
.anim-stagger > * {
  opacity: 0;
  animation: fadeInUp 400ms cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.anim-stagger > *:nth-child(1) { animation-delay: 50ms; }
.anim-stagger > *:nth-child(2) { animation-delay: 100ms; }
.anim-stagger > *:nth-child(3) { animation-delay: 150ms; }
.anim-stagger > *:nth-child(4) { animation-delay: 200ms; }
.anim-stagger > *:nth-child(5) { animation-delay: 250ms; }
.anim-stagger > *:nth-child(6) { animation-delay: 300ms; }
.anim-stagger > *:nth-child(7) { animation-delay: 350ms; }
.anim-stagger > *:nth-child(8) { animation-delay: 400ms; }
.anim-stagger > *:nth-child(9) { animation-delay: 450ms; }
.anim-stagger > *:nth-child(10) { animation-delay: 500ms; }

/* Skeleton loading */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--bg-tertiary) 25%,
    var(--bg-hover) 50%,
    var(--bg-tertiary) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}

.skeleton-text {
  height: 14px;
  margin-bottom: 8px;
  width: 100%;
}

.skeleton-text.short {
  width: 60%;
}

.skeleton-title {
  height: 24px;
  width: 40%;
  margin-bottom: 12px;
}

.skeleton-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
}

/* Spinner */
.spinner {
  width: 24px;
  height: 24px;
  border: 2.5px solid var(--border-default);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

.spinner-sm {
  width: 16px;
  height: 16px;
  border-width: 2px;
}

.spinner-lg {
  width: 36px;
  height: 36px;
  border-width: 3px;
}

/* Loading dots */
.loading-dots {
  display: inline-flex;
  gap: 4px;
  align-items: center;
}

.loading-dots span {
  width: 6px;
  height: 6px;
  background: var(--primary);
  border-radius: 50%;
  animation: dotPulse 1.4s infinite;
}

.loading-dots span:nth-child(2) { animation-delay: 0.2s; }
.loading-dots span:nth-child(3) { animation-delay: 0.4s; }

/* Ripple effect */
.ripple {
  position: relative;
  overflow: hidden;
}

.ripple-effect {
  position: absolute;
  border-radius: 50%;
  background: rgba(255,255,255,0.2);
  transform: scale(0);
  animation: ripple 0.6s linear;
  pointer-events: none;
}

/* Floating animation */
.anim-float {
  animation: float 3s ease-in-out infinite;
}

/* Glow animation */
.anim-glow {
  animation: glow 2s ease-in-out infinite;
}

/* Page transition */
.page-enter {
  animation: fadeInUp 300ms cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.page-exit {
  animation: fadeOut 150ms ease-out forwards;
}

/* Confetti */
.confetti-container {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  overflow: hidden;
}

.confetti-piece {
  position: absolute;
  top: -20px;
  width: 10px;
  height: 10px;
  border-radius: 2px;
  animation: confettiDrop 2s ease-in forwards;
}

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