/**
 * DERMEXPERT - Animations
 * Sobres mais haut de gamme
 */

/* ========================================
   1. KEYFRAMES
   ======================================== */

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

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

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

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

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

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

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

/* ========================================
   2. CLASSES D'ANIMATION
   ======================================== */

.animate {
  animation-fill-mode: both;
}

.animate-fadeIn {
  animation-name: fadeIn;
  animation-duration: 600ms;
  animation-timing-function: ease-out;
}

.animate-fadeInUp {
  animation-name: fadeInUp;
  animation-duration: 600ms;
  animation-timing-function: ease-out;
}

.animate-fadeInDown {
  animation-name: fadeInDown;
  animation-duration: 500ms;
  animation-timing-function: ease-out;
}

.animate-fadeInLeft {
  animation-name: fadeInLeft;
  animation-duration: 600ms;
  animation-timing-function: ease-out;
}

.animate-fadeInRight {
  animation-name: fadeInRight;
  animation-duration: 600ms;
  animation-timing-function: ease-out;
}

.animate-scaleIn {
  animation-name: scaleIn;
  animation-duration: 500ms;
  animation-timing-function: ease-out;
}

/* ========================================
   3. SCROLL REVEAL (Intersection Observer)
   ======================================== */

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 500ms ease-out, transform 500ms ease-out;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Variantes de reveal */
.reveal-fade {
  opacity: 0;
  transition: opacity 600ms ease-out;
}

.reveal-fade.is-visible {
  opacity: 1;
}

.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 600ms ease-out, transform 600ms ease-out;
}

.reveal-left.is-visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 600ms ease-out, transform 600ms ease-out;
}

.reveal-right.is-visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-scale {
  opacity: 0;
  transform: scale(0.96);
  transition: opacity 500ms ease-out, transform 500ms ease-out;
}

.reveal-scale.is-visible {
  opacity: 1;
  transform: scale(1);
}

/* Stagger delays pour les listes */
.reveal-stagger > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 400ms ease-out, transform 400ms ease-out;
}

.reveal-stagger.is-visible > *:nth-child(1) { transition-delay: 0ms; opacity: 1; transform: translateY(0); }
.reveal-stagger.is-visible > *:nth-child(2) { transition-delay: 100ms; opacity: 1; transform: translateY(0); }
.reveal-stagger.is-visible > *:nth-child(3) { transition-delay: 200ms; opacity: 1; transform: translateY(0); }
.reveal-stagger.is-visible > *:nth-child(4) { transition-delay: 300ms; opacity: 1; transform: translateY(0); }
.reveal-stagger.is-visible > *:nth-child(5) { transition-delay: 400ms; opacity: 1; transform: translateY(0); }
.reveal-stagger.is-visible > *:nth-child(6) { transition-delay: 500ms; opacity: 1; transform: translateY(0); }

/* ========================================
   4. HOVER EFFECTS PREMIUM
   ======================================== */

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

.hover-lift:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

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

.hover-scale:hover {
  transform: scale(1.02);
}

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

.hover-underline::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background-color: currentColor;
  transition: width var(--transition-base);
}

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

/* Image zoom on hover */
.hover-zoom {
  overflow: hidden;
}

.hover-zoom img {
  transition: transform var(--transition-slow);
}

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

/* ========================================
   5. MICRO-INTERACTIONS UI
   ======================================== */

/* Bouton - effet ripple */
.btn {
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.6s ease, height 0.6s ease;
}

.btn:hover::before {
  width: 300%;
  height: 300%;
}

/* Input focus animation */
.form-input,
.form-textarea {
  transition: border-color var(--transition-fast), 
              box-shadow var(--transition-fast),
              transform var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
  transform: translateY(-1px);
}

/* Checkbox animation */
.form-check-input {
  transition: all var(--transition-fast);
}

.form-check-input:checked {
  transform: scale(1.05);
}

/* Card hover */
.card {
  transition: border-color var(--transition-base), 
              box-shadow var(--transition-base),
              transform var(--transition-base);
}

.card:hover {
  transform: translateY(-2px);
}

/* Link hover */
.nav-link,
.footer-link {
  transition: color var(--transition-fast);
}

/* ========================================
   6. PARALLAX LÉGER
   ======================================== */

.parallax {
  will-change: transform;
}

.parallax-slow {
  transition: transform 0.1s linear;
}

/* ========================================
   7. LOADING STATES
   ======================================== */

.loading {
  position: relative;
  pointer-events: none;
}

.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  margin: -10px 0 0 -10px;
  border: 2px solid var(--color-gray-300);
  border-top-color: var(--color-antracite);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

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

/* ========================================
   8. PAGE TRANSITIONS
   ======================================== */

.page-transition {
  opacity: 0;
  animation: fadeIn 400ms ease-out forwards;
}

/* ========================================
   9. RÉDUCTION DES MOUVEMENTS
   ======================================== */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  
  .reveal,
  .reveal-fade,
  .reveal-left,
  .reveal-right,
  .reveal-scale {
    opacity: 1;
    transform: none;
  }
  
  .reveal-stagger > * {
    opacity: 1;
    transform: none;
  }
}