/* ═══════════════════════════════════════════════════════════════════
   ELYKSIR — Animations
   Scroll reveals, transitions, skeleton loaders, hero effects
   ═══════════════════════════════════════════════════════════════════ */

/* ═══════ SCROLL REVEAL ANIMATIONS ═══════ */

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.reveal--left {
  opacity: 0;
  transform: translateX(-24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.reveal--right {
  opacity: 0;
  transform: translateX(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.reveal--scale {
  opacity: 0;
  transform: scale(0.95);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* Stagger delays for grid items */
.reveal-stagger > .reveal:nth-child(1) { transition-delay: 0ms; }
.reveal-stagger > .reveal:nth-child(2) { transition-delay: 100ms; }
.reveal-stagger > .reveal:nth-child(3) { transition-delay: 200ms; }
.reveal-stagger > .reveal:nth-child(4) { transition-delay: 300ms; }
.reveal-stagger > .reveal:nth-child(5) { transition-delay: 400ms; }
.reveal-stagger > .reveal:nth-child(6) { transition-delay: 500ms; }
.reveal-stagger > .reveal:nth-child(7) { transition-delay: 600ms; }
.reveal-stagger > .reveal:nth-child(8) { transition-delay: 700ms; }
.reveal-stagger > .reveal:nth-child(9) { transition-delay: 800ms; }


/* ═══════ HERO GRADIENT ANIMATION ═══════ */

.hero-gradient {
  position: absolute;
  inset: 0;
  overflow: hidden;
  z-index: 0;
}

.hero-gradient::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(
    ellipse at 30% 50%,
    rgba(201, 168, 76, 0.06) 0%,
    transparent 50%
  ),
  radial-gradient(
    ellipse at 70% 30%,
    rgba(201, 168, 76, 0.04) 0%,
    transparent 40%
  ),
  radial-gradient(
    ellipse at 50% 80%,
    rgba(201, 168, 76, 0.03) 0%,
    transparent 45%
  );
  animation: heroGradientMove 20s ease-in-out infinite;
}

@keyframes heroGradientMove {
  0%, 100% {
    transform: translate(0, 0);
  }
  25% {
    transform: translate(3%, -2%);
  }
  50% {
    transform: translate(-2%, 3%);
  }
  75% {
    transform: translate(2%, 1%);
  }
}


/* ═══════ TAGLINE CYCLING ANIMATION ═══════ */

.tagline-cycle {
  position: relative;
  height: 1.5em;
  overflow: hidden;
}

.tagline-cycle__item {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  opacity: 0;
  transform: translateY(20px);
  animation: taglineCycle 12s ease-in-out infinite;
}

.tagline-cycle__item:nth-child(1) { animation-delay: 0s; }
.tagline-cycle__item:nth-child(2) { animation-delay: 3s; }
.tagline-cycle__item:nth-child(3) { animation-delay: 6s; }
.tagline-cycle__item:nth-child(4) { animation-delay: 9s; }

@keyframes taglineCycle {
  0% {
    opacity: 0;
    transform: translateY(20px);
  }
  5% {
    opacity: 1;
    transform: translateY(0);
  }
  20% {
    opacity: 1;
    transform: translateY(0);
  }
  25% {
    opacity: 0;
    transform: translateY(-20px);
  }
  100% {
    opacity: 0;
    transform: translateY(-20px);
  }
}


/* ═══════ SKELETON LOADERS ═══════ */

.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-navy-mid) 25%,
    rgba(201, 168, 76, 0.05) 50%,
    var(--color-navy-mid) 75%
  );
  background-size: 200% 100%;
  animation: skeletonShimmer 1.5s ease-in-out infinite;
  border-radius: var(--radius-sm);
}

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

.skeleton--text {
  height: 14px;
  width: 80%;
  margin-bottom: var(--space-2);
}

.skeleton--text-sm {
  height: 12px;
  width: 60%;
  margin-bottom: var(--space-2);
}

.skeleton--heading {
  height: 24px;
  width: 50%;
  margin-bottom: var(--space-4);
}

.skeleton--card {
  height: 200px;
  width: 100%;
}

.skeleton--avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
}

.skeleton--btn {
  height: 40px;
  width: 120px;
  border-radius: var(--radius-sm);
}

.skeleton--image {
  width: 100%;
  height: 180px;
  border-radius: var(--radius-md);
}


/* ═══════ PAGE TRANSITION ═══════ */

.page-enter {
  opacity: 0;
  animation: pageEnter 0.4s ease forwards;
}

@keyframes pageEnter {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}


/* ═══════ COUNTER ANIMATION ═══════ */

.counter-animate {
  display: inline-block;
  font-variant-numeric: tabular-nums;
}


/* ═══════ LOGO STRIP ═══════ */

.logo-strip {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-10);
  flex-wrap: wrap;
  padding: var(--space-8) 0;
}

.logo-strip__item {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  color: var(--color-text-muted);
  opacity: 0.5;
  transition: opacity var(--transition-base), color var(--transition-base);
  white-space: nowrap;
}

.logo-strip__item:hover {
  opacity: 1;
  color: var(--color-gold);
}


/* ═══════ PULSE / LIVE INDICATOR ═══════ */

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background-color: var(--color-success);
  position: relative;
}

.pulse-dot::after {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: var(--radius-full);
  border: 2px solid var(--color-success);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% {
    opacity: 0;
    transform: scale(0.8);
  }
  50% {
    opacity: 0.5;
    transform: scale(1.2);
  }
}


/* ═══════ SLIDE PANEL ═══════ */

.slide-panel {
  position: fixed;
  top: var(--nav-height);
  right: 0;
  bottom: 0;
  width: 480px;
  max-width: 100vw;
  background-color: var(--color-navy-deep);
  border-left: var(--border-thin);
  box-shadow: var(--shadow-xl);
  z-index: var(--z-overlay);
  transform: translateX(100%);
  transition: transform var(--transition-base);
  overflow-y: auto;
}

.slide-panel.is-open {
  transform: translateX(0);
}

.slide-panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-6);
  border-bottom: var(--border-thin);
  position: sticky;
  top: 0;
  background-color: var(--color-navy-deep);
  z-index: 1;
}

.slide-panel__body {
  padding: var(--space-6);
}

.slide-panel__footer {
  padding: var(--space-4) var(--space-6);
  border-top: var(--border-thin);
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
  position: sticky;
  bottom: 0;
  background-color: var(--color-navy-deep);
}

.slide-panel__overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(10, 15, 30, 0.6);
  z-index: calc(var(--z-overlay) - 1);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}

.slide-panel__overlay.is-open {
  opacity: 1;
  visibility: visible;
}

@media (max-width: 768px) {
  .slide-panel {
    width: 100vw;
  }
}


/* ═══════ EVENT CHIPS (CALENDAR) ═══════ */

.event-chip {
  display: inline-block;
  padding: 2px var(--space-2);
  font-size: 10px;
  font-weight: var(--weight-medium);
  border-radius: var(--radius-sm);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
  cursor: pointer;
  transition: opacity var(--transition-fast);
}

.event-chip:hover {
  opacity: 0.8;
}

.event-chip--session     { background-color: var(--color-info-bg); color: #5B8DB8; }
.event-chip--summit      { background-color: var(--color-gold-dim); color: var(--color-gold); }
.event-chip--cercle_ysee { background-color: rgba(147, 51, 234, 0.15); color: #A855F7; }
.event-chip--hackathon   { background-color: var(--color-warning-bg); color: #C8A43A; }
.event-chip--ceremony    { background-color: var(--color-success-bg); color: #4ADE80; }
.event-chip--coaching    { background-color: rgba(59, 130, 246, 0.15); color: #60A5FA; }
.event-chip--oral        { background-color: var(--color-error-bg); color: #F87171; }
.event-chip--exam        { background-color: var(--color-error-bg); color: #F87171; }
.event-chip--external    { background-color: rgba(138, 134, 128, 0.15); color: var(--color-text-muted); }


/* ═══════ REDUCED MOTION ═══════ */

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

  .reveal,
  .reveal--left,
  .reveal--right,
  .reveal--scale {
    opacity: 1;
    transform: none;
  }

  .hero-gradient::before {
    animation: none;
  }

  .tagline-cycle__item {
    animation: none;
  }

  .tagline-cycle__item:first-child {
    opacity: 1;
    transform: none;
    position: relative;
  }
}