/*
 * Animations & Transitions
 * Scroll animations, keyframes, and micro-interactions
 */

/* ===================================
   SCROLL ANIMATIONS
   Elements fade in when scrolled into view
   ================================= */

/* Initial state for animated elements */
[data-animate] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

/* Animated state (added by JavaScript) */
[data-animate].animated {
  opacity: 1;
  transform: translateY(0);
}

/* Animation variations */
[data-animate="fade-up"].animated {
  opacity: 1;
  transform: translateY(0);
}

[data-animate="fade-down"] {
  transform: translateY(-30px);
}

[data-animate="fade-down"].animated {
  opacity: 1;
  transform: translateY(0);
}

[data-animate="fade-left"] {
  transform: translateX(30px);
}

[data-animate="fade-left"].animated {
  opacity: 1;
  transform: translateX(0);
}

[data-animate="fade-right"] {
  transform: translateX(-30px);
}

[data-animate="fade-right"].animated {
  opacity: 1;
  transform: translateX(0);
}

[data-animate="fade"] {
  transform: none;
}

[data-animate="fade"].animated {
  opacity: 1;
}

[data-animate="scale"] {
  transform: scale(0.9);
}

[data-animate="scale"].animated {
  opacity: 1;
  transform: scale(1);
}

/* Stagger delay for multiple elements */
[data-animate-delay="1"] {
  transition-delay: 100ms;
}

[data-animate-delay="2"] {
  transition-delay: 200ms;
}

[data-animate-delay="3"] {
  transition-delay: 300ms;
}

[data-animate-delay="4"] {
  transition-delay: 400ms;
}

[data-animate-delay="5"] {
  transition-delay: 500ms;
}

/* ===================================
   KEYFRAME ANIMATIONS
   ================================= */

/* Fade in */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* Fade in up */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Fade in down */
@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

/* Slide in right */
@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(-100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Slide in left */
@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Pulse */
@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.7;
  }
}

/* Bounce */
@keyframes bounce {
  0%, 100% {
    transform: translateX(-50%) translateY(0);
  }
  50% {
    transform: translateX(-50%) translateY(-10px);
  }
}

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

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

/* ===================================
   SCROLL INDICATOR
   For hero section
   ================================= */

.scroll-indicator {
  position: absolute;
  bottom: var(--space-6);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
  animation: bounce 2s infinite;
  z-index: var(--z-10);
}

.scroll-indicator span {
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  color: var(--color-white);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
}

.scroll-indicator::after {
  content: '';
  width: 18px;
  height: 18px;
  border-right: 2px solid var(--color-white);
  border-bottom: 2px solid var(--color-white);
  transform: rotate(45deg);
}

/* ===================================
   LOADING SPINNER
   ================================= */

.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--color-teal-200);
  border-top-color: var(--color-teal-600);
  border-radius: var(--radius-full);
  animation: spin 0.8s linear infinite;
}

.spinner-sm {
  width: 20px;
  height: 20px;
  border-width: 2px;
}

.spinner-lg {
  width: 60px;
  height: 60px;
  border-width: 6px;
}

/* ===================================
   RIPPLE EFFECT (Button micro-interaction)
   ================================= */

.ripple {
  position: relative;
  overflow: hidden;
}

.ripple::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.5);
  transform: translate(-50%, -50%);
  transition: width var(--transition-slow), height var(--transition-slow);
}

.ripple:active::after {
  width: 300px;
  height: 300px;
}

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

.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-gray-200) 25%,
    var(--color-gray-300) 50%,
    var(--color-gray-200) 75%
  );
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
  border-radius: var(--radius-md);
}

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

.skeleton-text {
  height: 1em;
  margin-bottom: var(--space-2);
}

.skeleton-title {
  height: 2em;
  margin-bottom: var(--space-4);
}

.skeleton-avatar {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-full);
}

/* ===================================
   PROGRESS BAR
   ================================= */

.progress {
  width: 100%;
  height: 8px;
  background-color: var(--color-gray-200);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: var(--gradient-teal-accent);
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
}

.progress-bar-animated {
  background-size: 200% 100%;
  animation: progress-animation 1.5s linear infinite;
}

@keyframes progress-animation {
  0% {
    background-position: 0 0;
  }
  100% {
    background-position: 100% 0;
  }
}

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

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

.hover-lift:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-teal);
}

/* Hover grow */
.hover-grow {
  transition: transform var(--transition-base);
}

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

/* Hover underline */
.hover-underline {
  position: relative;
}

.hover-underline::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--gradient-teal-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.hover-underline:hover::after {
  transform: scaleX(1);
}

/* ===================================
   REDUCED MOTION
   Respect user preferences
   ================================= */

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

  .scroll-indicator {
    animation: none;
  }

  [data-animate] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}