/* ============================================
   BLOG ANIMATIONS
   Scroll animations, transitions, and effects
   ============================================ */

/* ========== FADE IN ANIMATIONS ========== */
.fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in-up.animated {
  opacity: 1;
  transform: translateY(0);
}

.fade-in {
  opacity: 0;
  transition: opacity 0.6s ease-out;
}

.fade-in.animated {
  opacity: 1;
}

.fade-in-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in-left.animated {
  opacity: 1;
  transform: translateX(0);
}

.fade-in-right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in-right.animated {
  opacity: 1;
  transform: translateX(0);
}

/* ========== SCALE ANIMATIONS ========== */
.scale-in {
  opacity: 0;
  transform: scale(0.9);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.scale-in.animated {
  opacity: 1;
  transform: scale(1);
}

/* ========== STAGGER DELAY ========== */
.fade-in-up:nth-child(1) { transition-delay: 0.1s; }
.fade-in-up:nth-child(2) { transition-delay: 0.2s; }
.fade-in-up:nth-child(3) { transition-delay: 0.3s; }
.fade-in-up:nth-child(4) { transition-delay: 0.4s; }
.fade-in-up:nth-child(5) { transition-delay: 0.5s; }
.fade-in-up:nth-child(6) { transition-delay: 0.6s; }

/* ========== READING PROGRESS BAR ========== */
.reading-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 4px;
  background: linear-gradient(90deg, var(--blog-accent) 0%, var(--blog-primary) 100%);
  z-index: var(--blog-z-sticky);
  transition: width 0.1s ease-out;
}

/* ========== LOADING ANIMATIONS ========== */
@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.loading {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

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

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

/* ========== SKELETON LOADING ========== */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--blog-gray-200) 25%,
    var(--blog-gray-100) 50%,
    var(--blog-gray-200) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
}

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

/* ========== HOVER EFFECTS ========== */
.hover-lift {
  transition: transform var(--blog-transition-base), box-shadow var(--blog-transition-base);
}

.hover-lift:hover {
  transform: translateY(-5px);
  box-shadow: var(--blog-shadow-lg);
}

.hover-scale {
  transition: transform var(--blog-transition-base);
}

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

/* ========== IMAGE ZOOM EFFECT ========== */
.image-zoom-container {
  overflow: hidden;
  border-radius: var(--blog-border-radius-md);
}

.image-zoom {
  transition: transform var(--blog-transition-slow);
}

.image-zoom-container:hover .image-zoom {
  transform: scale(1.1);
}

/* ========== BUTTON ANIMATIONS ========== */
.btn-animated {
  position: relative;
  overflow: hidden;
}

.btn-animated::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background-color: rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn-animated:hover::before {
  width: 300px;
  height: 300px;
}

/* ========== SLIDE IN ANIMATIONS ========== */
@keyframes slideInFromLeft {
  from {
    transform: translateX(-100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

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

.slide-in-left {
  animation: slideInFromLeft 0.6s ease-out;
}

.slide-in-right {
  animation: slideInFromRight 0.6s ease-out;
}

/* ========== BOUNCE ANIMATION ========== */
@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(-10px);
  }
  60% {
    transform: translateY(-5px);
  }
}

.bounce {
  animation: bounce 2s infinite;
}

/* ========== TYPEWRITER EFFECT ========== */
@keyframes typing {
  from {
    width: 0;
  }
  to {
    width: 100%;
  }
}

@keyframes blink-caret {
  from, to {
    border-color: transparent;
  }
  50% {
    border-color: var(--blog-primary);
  }
}

.typewriter {
  overflow: hidden;
  border-right: 2px solid var(--blog-primary);
  white-space: nowrap;
  animation: typing 3.5s steps(40, end), blink-caret 0.75s step-end infinite;
}

/* ========== UNDERLINE ANIMATION ========== */
.underline-animated {
  position: relative;
  text-decoration: none;
}

.underline-animated::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--blog-accent);
  transition: width var(--blog-transition-base);
}

.underline-animated:hover::after {
  width: 100%;
}

/* ========== PAGE TRANSITIONS ========== */
.page-enter {
  opacity: 0;
  transform: translateY(20px);
}

.page-enter-active {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.3s, transform 0.3s;
}

.page-exit {
  opacity: 1;
  transform: translateY(0);
}

.page-exit-active {
  opacity: 0;
  transform: translateY(-20px);
  transition: opacity 0.3s, transform 0.3s;
}

/* ========== SMOOTH SCROLL ========== */
html {
  scroll-behavior: smooth;
}

/* Override smooth scroll for reduced motion preference */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ========== ACCESSIBILITY ========== */
.no-motion .fade-in-up,
.no-motion .fade-in,
.no-motion .fade-in-left,
.no-motion .fade-in-right,
.no-motion .scale-in {
  opacity: 1;
  transform: none;
  transition: none;
}