/* ============================================================
   e-talent.tn — animations.css
   Keyframes CSS, classes utilitaires d'animation,
   intersection observer helpers, effets de scroll
   ============================================================ */

/* ============================================================
   1. KEYFRAMES
   ============================================================ */
@keyframes orbit-spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

@keyframes float-node {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-10px); }
}

@keyframes float-slow {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  33%       { transform: translateY(-8px) rotate(2deg); }
  66%       { transform: translateY(4px) rotate(-1deg); }
}

@keyframes pulse-ring {
  0%   { transform: scale(1);   opacity: .6; }
  100% { transform: scale(1.8); opacity: 0; }
}

@keyframes shimmer {
  0%   { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

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

@keyframes typing-cursor {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

@keyframes slide-up {
  from { opacity: 0; transform: translateY(32px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes slide-down {
  from { opacity: 0; transform: translateY(-24px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes slide-left {
  from { opacity: 0; transform: translateX(40px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes slide-right {
  from { opacity: 0; transform: translateX(-40px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes scale-in {
  from { opacity: 0; transform: scale(.9); }
  to   { opacity: 1; transform: scale(1); }
}

@keyframes scale-bounce {
  0%   { transform: scale(0.8); opacity: 0; }
  60%  { transform: scale(1.05); opacity: 1; }
  100% { transform: scale(1); }
}

@keyframes count-up {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes line-grow {
  from { transform: scaleX(0); }
  to   { transform: scaleX(1); }
}

@keyframes line-grow-v {
  from { transform: scaleY(0); }
  to   { transform: scaleY(1); }
}

@keyframes dot-bounce {
  0%, 80%, 100% { transform: scale(0); }
  40%            { transform: scale(1); }
}

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

@keyframes hero-text-reveal {
  from { opacity: 0; transform: translateY(40px) skewY(2deg); }
  to   { opacity: 1; transform: translateY(0) skewY(0deg); }
}

@keyframes particle-move {
  0%   { transform: translate(0, 0) rotate(0deg); opacity: .4; }
  33%  { transform: translate(20px, -15px) rotate(90deg); opacity: .7; }
  66%  { transform: translate(-10px, 10px) rotate(180deg); opacity: .3; }
  100% { transform: translate(0, 0) rotate(360deg); opacity: .4; }
}

@keyframes glow-pulse {
  0%, 100% { box-shadow: 0 0 20px rgba(0,112,192,.3); }
  50%       { box-shadow: 0 0 40px rgba(0,112,192,.6), 0 0 80px rgba(0,80,176,.2); }
}

/* ============================================================
   2. SCROLL REVEAL — Classes de base (état initial invisible)
   ============================================================ */

/* Toutes les cibles de révélation commencent invisibles */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity .7s cubic-bezier(.4,0,.2,1),
              transform .7s cubic-bezier(.4,0,.2,1);
}

.reveal.from-left {
  opacity: 0;
  transform: translateX(-40px);
}

.reveal.from-right {
  opacity: 0;
  transform: translateX(40px);
}

.reveal.from-bottom {
  opacity: 0;
  transform: translateY(40px);
}

.reveal.scale {
  opacity: 0;
  transform: scale(.92);
}

/* État visible (ajouté par JS via IntersectionObserver) */
.reveal.visible {
  opacity: 1;
  transform: translateY(0) translateX(0) scale(1);
}

/* Délais en cascade */
.reveal-delay-1 { transition-delay: .1s; }
.reveal-delay-2 { transition-delay: .2s; }
.reveal-delay-3 { transition-delay: .3s; }
.reveal-delay-4 { transition-delay: .4s; }
.reveal-delay-5 { transition-delay: .5s; }
.reveal-delay-6 { transition-delay: .6s; }
.reveal-delay-7 { transition-delay: .7s; }
.reveal-delay-8 { transition-delay: .8s; }

/* ============================================================
   3. HERO ANIMATIONS
   ============================================================ */
.hero-title-word {
  display: inline-block;
  overflow: hidden;
}

.hero-title-word span {
  display: inline-block;
  animation: hero-text-reveal .9s cubic-bezier(.4,0,.2,1) both;
}

.hero__kicker-anim {
  animation: slide-down .7s ease both;
  animation-delay: .1s;
}

.hero__title-anim {
  animation: slide-up .9s ease both;
  animation-delay: .2s;
}

.hero__subtitle-anim {
  animation: slide-up .9s ease both;
  animation-delay: .4s;
}

.hero__cta-anim {
  animation: slide-up .9s ease both;
  animation-delay: .6s;
}

.hero__visual-anim {
  animation: scale-in 1s ease both;
  animation-delay: .3s;
}

/* Particules hero */
.particle {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  animation: particle-move linear infinite;
}

/* ============================================================
   4. COMPOSANTS ANIMÉS
   ============================================================ */

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

.btn--ripple::after {
  content: '';
  position: absolute;
  left: 50%;
  top: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255,255,255,.25);
  transform: translate(-50%, -50%);
  transition: width .4s ease, height .4s ease, opacity .4s ease;
  opacity: 0;
}

.btn--ripple:active::after {
  width: 200px;
  height: 200px;
  opacity: 0;
}

/* Underline animé */
.link-underline {
  position: relative;
  display: inline-block;
}

.link-underline::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform .3s ease;
}

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

/* Gradient text animé */
.text-gradient {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-gradient-anim {
  background: linear-gradient(135deg, #0050B0, #0070C0, #F09000, #0050B0);
  background-size: 300% 300%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradient-shift 4s ease infinite;
}

/* Icône avec spin au hover */
.icon-hover-spin:hover svg,
.icon-hover-spin:hover i {
  animation: spin .5s ease;
}

/* Card tilt au hover (subtile) — géré via JS */
.card-tilt {
  transition: transform .2s ease, box-shadow .2s ease;
  transform-style: preserve-3d;
  will-change: transform;
}

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

.loading-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
  animation: dot-bounce 1.4s ease-in-out infinite;
}

.loading-dot:nth-child(2) { animation-delay: .16s; }
.loading-dot:nth-child(3) { animation-delay: .32s; }

/* Progress bar animée */
.progress-bar {
  height: 4px;
  background: var(--gray-100);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--grad-primary);
  border-radius: var(--radius-full);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 1.2s cubic-bezier(.4,0,.2,1);
}

.progress-fill.animated { transform: scaleX(1); }

/* Numéro qui monte (counter) */
.counter {
  display: inline-block;
  animation: count-up .6s ease both;
}

/* Traits de section */
.section-line {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.section-line__bar {
  flex: 1;
  height: 1px;
  background: var(--gray-100);
}

.section-line__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}

/* Glow effects */
.glow-blue {
  animation: glow-pulse 3s ease-in-out infinite;
}

/* Scroll indicator */
.scroll-indicator {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  animation: float-node 2.5s ease-in-out infinite;
  cursor: pointer;
}

.scroll-indicator__icon {
  width: 32px;
  height: 50px;
  border: 2px solid rgba(255,255,255,.3);
  border-radius: 20px;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 6px;
}

.scroll-indicator__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--white);
  animation: float-slow 2s ease-in-out infinite;
}

.scroll-indicator__text {
  font-size: var(--text-xs);
  color: rgba(255,255,255,.45);
  letter-spacing: .1em;
  text-transform: uppercase;
}

/* Nav progress bar */
.nav-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  z-index: 2000;
  transform-origin: left;
  transform: scaleX(0);
  transition: transform .1s linear;
}

/* Page transition overlay */
.page-transition {
  position: fixed;
  inset: 0;
  background: var(--navy);
  z-index: 9999;
  pointer-events: none;
  opacity: 0;
  transition: opacity .3s ease;
}

.page-transition.active {
  opacity: 1;
  pointer-events: all;
}

/* Chip animée (expertise) */
.chip-enter {
  animation: scale-bounce .5s cubic-bezier(.34,1.56,.64,1) both;
}

/* Hover glow card */
.glow-card {
  position: relative;
  overflow: hidden;
}

.glow-card::after {
  content: '';
  position: absolute;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0,80,176,.15) 0%, transparent 70%);
  pointer-events: none;
  opacity: 0;
  transition: opacity .3s ease;
  transform: translate(-50%, -50%);
  /* Position via JS mouseenter */
  top: 50%;
  left: 50%;
}

.glow-card:hover::after { opacity: 1; }

/* Flèche animée */
.arrow-bounce {
  display: inline-block;
  animation: float-node 1.5s ease-in-out infinite;
}

/* ============================================================
   5. PREFERS-REDUCED-MOTION
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }

  .reveal {
    opacity: 1 !important;
    transform: none !important;
  }

  .hero-orbit { animation: none !important; }
  .hero-node__dot { animation: none !important; }
  .hero-stat { animation: none !important; }
  .whatsapp-btn__pulse { animation: none !important; }
  .particle { display: none !important; }
}

/* ============================================================
   6. UTILITAIRES D'ANIMATION
   ============================================================ */
.anim-float    { animation: float-node 4s ease-in-out infinite; }
.anim-float-slow { animation: float-slow 6s ease-in-out infinite; }
.anim-spin     { animation: spin 2s linear infinite; }
.anim-pulse    { animation: glow-pulse 2s ease-in-out infinite; }
.anim-shimmer  { animation: shimmer 2s ease-in-out infinite; }

/* Stagger children */
.stagger-children > *:nth-child(1) { animation-delay: .05s; }
.stagger-children > *:nth-child(2) { animation-delay: .15s; }
.stagger-children > *:nth-child(3) { animation-delay: .25s; }
.stagger-children > *:nth-child(4) { animation-delay: .35s; }
.stagger-children > *:nth-child(5) { animation-delay: .45s; }
.stagger-children > *:nth-child(6) { animation-delay: .55s; }
.stagger-children > *:nth-child(7) { animation-delay: .65s; }
.stagger-children > *:nth-child(8) { animation-delay: .75s; }

/* Durées */
.duration-200 { transition-duration: .2s; }
.duration-300 { transition-duration: .3s; }
.duration-500 { transition-duration: .5s; }
.duration-700 { transition-duration: .7s; }