/**
 * CSS Animations
 * Reusable animation classes and keyframes
 */

/* ===========================
   FADE ANIMATIONS
   =========================== */

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

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

@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);
  }
}

.fade-in {
  animation: fadeIn var(--transition-base) var(--ease-out);
}

.fade-out {
  animation: fadeOut var(--transition-base) var(--ease-in);
}

.fade-in-up {
  animation: fadeInUp var(--transition-base) var(--ease-out);
}

.fade-in-down {
  animation: fadeInDown var(--transition-base) var(--ease-out);
}

/* ===========================
   SLIDE ANIMATIONS
   =========================== */

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

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

@keyframes slideLeft {
  from {
    transform: translateX(100%);
  }
  to {
    transform: translateX(0);
  }
}

@keyframes slideRight {
  from {
    transform: translateX(-100%);
  }
  to {
    transform: translateX(0);
  }
}

.slide-up {
  animation: slideUp var(--transition-base) var(--ease-out);
}

.slide-down {
  animation: slideDown var(--transition-base) var(--ease-out);
}

.slide-left {
  animation: slideLeft var(--transition-base) var(--ease-out);
}

.slide-right {
  animation: slideRight var(--transition-base) var(--ease-out);
}

/* ===========================
   SCALE ANIMATIONS
   =========================== */

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

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

@keyframes scaleUp {
  from {
    transform: scale(1);
  }
  to {
    transform: scale(1.1);
  }
}

.scale-in {
  animation: scaleIn var(--transition-base) var(--ease-out);
}

.scale-out {
  animation: scaleOut var(--transition-base) var(--ease-in);
}

.scale-up {
  animation: scaleUp var(--transition-base) var(--ease-out);
}

/* ===========================
   BOUNCE ANIMATION
   =========================== */

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(-20px);
  }
  60% {
    transform: translateY(-10px);
  }
}

.bounce {
  animation: bounce 1s var(--ease-in-out) infinite;
}

/* ===========================
   SHAKE ANIMATION
   =========================== */

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

.shake {
  animation: shake 0.5s var(--ease-in-out);
}

/* ===========================
   PULSE ANIMATION
   =========================== */

@keyframes pulse {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.8;
    transform: scale(1.05);
  }
}

.pulse {
  animation: pulse 2s var(--ease-in-out) infinite;
}

/* ===========================
   SPIN ANIMATION
   =========================== */

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

.spin {
  animation: spin 1s linear infinite;
}

/* ===========================
   SKELETON LOADING
   =========================== */

@keyframes shimmer {
  0% {
    background-position: -1000px 0;
  }
  100% {
    background-position: 1000px 0;
  }
}

.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-neutral-100) 0%,
    var(--color-neutral-200) 50%,
    var(--color-neutral-100) 100%
  );
  background-size: 1000px 100%;
  animation: shimmer 2s infinite linear;
}

.skeleton-text {
  height: 1rem;
  margin-bottom: var(--space-2);
  border-radius: var(--border-radius-base);
}

.skeleton-title {
  height: 2rem;
  margin-bottom: var(--space-4);
  border-radius: var(--border-radius-base);
  width: 60%;
}

.skeleton-avatar {
  width: 48px;
  height: 48px;
  border-radius: var(--border-radius-full);
}

.skeleton-card {
  height: 200px;
  border-radius: var(--border-radius-lg);
  margin-bottom: var(--space-4);
}

/* ===========================
   PAGE TRANSITION ANIMATIONS
   =========================== */

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

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

.page-enter {
  animation: pageEnter 0.4s var(--ease-out);
}

.page-exit {
  animation: pageExit 0.4s var(--ease-in);
}

/* ===========================
   ROTATE ANIMATIONS
   =========================== */

@keyframes rotate3d {
  from {
    transform: rotateY(0deg) rotateX(0deg);
  }
  to {
    transform: rotateY(360deg) rotateX(360deg);
  }
}

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

.rotate-3d {
  animation: rotate3d 10s linear infinite;
  transform-style: preserve-3d;
}

.rotate-y {
  animation: rotateY 2s linear infinite;
}

/* ===========================
   FLOAT ANIMATION
   =========================== */

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-20px);
  }
}

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

/* ===========================
   GLOW ANIMATION
   =========================== */

@keyframes glow {
  0%, 100% {
    box-shadow: 0 0 5px rgba(0, 102, 204, 0.5);
  }
  50% {
    box-shadow: 0 0 20px rgba(0, 102, 204, 0.8);
  }
}

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

/* ===========================
   BLINK ANIMATION
   =========================== */

@keyframes blink {
  0%, 50%, 100% {
    opacity: 1;
  }
  25%, 75% {
    opacity: 0;
  }
}

.blink {
  animation: blink 1.5s linear infinite;
}

/* ===========================
   SLIDE & FADE ANIMATIONS
   =========================== */

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

@keyframes slideOutFadeOut {
  from {
    opacity: 1;
    transform: translateX(0);
  }
  to {
    opacity: 0;
    transform: translateX(30px);
  }
}

.slide-in-fade-in {
  animation: slideInFadeIn var(--transition-base) var(--ease-out);
}

.slide-out-fade-out {
  animation: slideOutFadeOut var(--transition-base) var(--ease-in);
}

/* ===========================
   ATTENTION SEEKERS
   =========================== */

@keyframes heartbeat {
  0%, 100% {
    transform: scale(1);
  }
  10%, 30% {
    transform: scale(1.1);
  }
  20%, 40% {
    transform: scale(1);
  }
}

.heartbeat {
  animation: heartbeat 1.3s ease-in-out infinite;
}

@keyframes rubberBand {
  0%, 100% {
    transform: scale(1);
  }
  30% {
    transform: scaleX(1.25) scaleY(0.75);
  }
  40% {
    transform: scaleX(0.75) scaleY(1.25);
  }
  60% {
    transform: scaleX(1.15) scaleY(0.85);
  }
}

.rubber-band {
  animation: rubberBand 1s ease-in-out;
}

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

/* Animation Delays */
.delay-100 { animation-delay: 0.1s; }
.delay-200 { animation-delay: 0.2s; }
.delay-300 { animation-delay: 0.3s; }
.delay-500 { animation-delay: 0.5s; }
.delay-700 { animation-delay: 0.7s; }
.delay-1000 { animation-delay: 1s; }

/* Animation Durations */
.duration-fast { animation-duration: var(--transition-fast); }
.duration-base { animation-duration: var(--transition-base); }
.duration-slow { animation-duration: var(--transition-slow); }

/* Animation Iterations */
.iterate-1 { animation-iteration-count: 1; }
.iterate-2 { animation-iteration-count: 2; }
.iterate-3 { animation-iteration-count: 3; }
.iterate-infinite { animation-iteration-count: infinite; }

/* Animation Fill Modes */
.fill-forwards { animation-fill-mode: forwards; }
.fill-backwards { animation-fill-mode: backwards; }
.fill-both { animation-fill-mode: both; }

/* Animation States */
.paused { animation-play-state: paused; }
.running { animation-play-state: running; }

/* ===========================
   TRANSITION UTILITIES
   =========================== */

.transition-all {
  transition: all var(--transition-base) var(--ease-in-out);
}

.transition-colors {
  transition: background-color var(--transition-base) var(--ease-in-out),
              border-color var(--transition-base) var(--ease-in-out),
              color var(--transition-base) var(--ease-in-out);
}

.transition-opacity {
  transition: opacity var(--transition-base) var(--ease-in-out);
}

.transition-transform {
  transition: transform var(--transition-base) var(--ease-in-out);
}

.transition-shadow {
  transition: box-shadow var(--transition-base) var(--ease-in-out);
}

/* ===========================
   HOVER EFFECTS
   =========================== */

.hover-lift {
  transition: transform var(--transition-base) var(--ease-out);
}

.hover-lift:hover {
  transform: translateY(-5px);
}

.hover-grow {
  transition: transform var(--transition-base) var(--ease-out);
}

.hover-grow:hover {
  transform: scale(1.05);
}

.hover-glow {
  transition: box-shadow var(--transition-base) var(--ease-out);
}

.hover-glow:hover {
  box-shadow: 0 0 20px rgba(0, 102, 204, 0.5);
}

/* ===========================
   REDUCED MOTION
   =========================== */

/* Respect user's motion preferences */
@media (prefers-reduced-motion: reduce) {
  /* Apply to animated elements only */
  .fade-in, .fade-out, .fade-in-up, .fade-in-down,
  .slide-up, .slide-down, .slide-left, .slide-right,
  .scale-in, .scale-out, .scale-up,
  .bounce, .shake, .pulse, .spin, .float, .glow, .blink,
  .heartbeat, .rubber-band, .rotate-3d, .rotate-y,
  .page-enter, .page-exit,
  .skeleton,
  [class*="animate-"],
  [class*="transition-"] {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  /* Simplified skeleton loading */
  .skeleton {
    animation: none;
    background: var(--color-neutral-200);
  }
}