/* ── Keyframes ── */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.92);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(-16px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes barGrow {
  from { transform: scaleY(0); }
  to { transform: scaleY(1); }
}

@keyframes pulseOnce {
  0% { transform: scale(1); }
  50% { transform: scale(1.08); }
  100% { transform: scale(1); }
}

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

/* ── Hero load-in ── */
.hero__badge { animation: fadeInUp var(--duration-normal) var(--ease-out) 0.05s both; }
.hero__title { animation: fadeInUp var(--duration-normal) var(--ease-out) 0.12s both; }
.hero__desc { animation: fadeInUp var(--duration-normal) var(--ease-out) 0.2s both; }
.hero__actions { animation: fadeInUp var(--duration-normal) var(--ease-out) 0.28s both; }

/* ── Scroll reveal ── */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity var(--duration-normal) var(--ease-out),
    transform var(--duration-normal) var(--ease-out);
}

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

.reveal--scale {
  transform: scale(0.96);
}

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

.reveal--right {
  transform: translateX(-18px);
}

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

/* Stagger children in grids */
.card-grid .reveal:nth-child(1) { transition-delay: 0.04s; }
.card-grid .reveal:nth-child(2) { transition-delay: 0.08s; }
.card-grid .reveal:nth-child(3) { transition-delay: 0.12s; }
.card-grid .reveal:nth-child(4) { transition-delay: 0.16s; }

/* ── Interactive micro-animations ── */
.btn {
  transition:
    background var(--duration-fast) var(--ease-out),
    color var(--duration-fast) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out),
    transform var(--duration-fast) var(--ease-out),
    box-shadow var(--duration-fast) var(--ease-out);
}

.btn--primary:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: var(--shadow-colored);
}

.btn--primary:active:not(:disabled) {
  transform: translateY(0);
}

.btn--outline:hover {
  transform: translateY(-1px);
}

.card {
  transition:
    transform var(--duration-fast) var(--ease-out),
    box-shadow var(--duration-fast) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out);
}

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

.card--step img,
.card--step svg {
  transition: transform var(--duration-fast) var(--ease-out);
}

.card--step:hover img,
.card--step:hover svg {
  transform: scale(1.08);
}

.header {
  transition: box-shadow var(--duration-fast) var(--ease-out);
}

.header.is-scrolled {
  box-shadow: var(--shadow-lg);
}

.split__image {
  transition: transform var(--duration-normal) var(--ease-out);
}

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

.impact-box {
  transition: transform var(--duration-normal) var(--ease-out);
}

.impact-box.is-visible {
  animation: scaleIn 0.5s var(--ease-out) both;
}

.bar-chart__bar {
  transform-origin: bottom;
  transform: scaleY(0);
}

.bar-chart-wrap.is-visible .bar-chart__bar,
.bar-chart.is-visible .bar-chart__bar {
  animation: barGrow 0.55s var(--ease-out) forwards;
}

.bar-chart-wrap.is-visible .bar-chart__item:nth-child(1) .bar-chart__bar,
.bar-chart.is-visible .bar-chart__item:nth-child(1) .bar-chart__bar { animation-delay: 0.05s; }
.bar-chart-wrap.is-visible .bar-chart__item:nth-child(2) .bar-chart__bar,
.bar-chart.is-visible .bar-chart__item:nth-child(2) .bar-chart__bar { animation-delay: 0.12s; }
.bar-chart-wrap.is-visible .bar-chart__item:nth-child(3) .bar-chart__bar,
.bar-chart.is-visible .bar-chart__item:nth-child(3) .bar-chart__bar { animation-delay: 0.19s; }
.bar-chart-wrap.is-visible .bar-chart__item:nth-child(4) .bar-chart__bar,
.bar-chart.is-visible .bar-chart__item:nth-child(4) .bar-chart__bar { animation-delay: 0.26s; }

.timeline__circle {
  transition: transform var(--duration-fast) var(--ease-out);
}

.timeline.is-visible .timeline__circle {
  animation: pulseOnce 0.45s var(--ease-out) both;
}

.timeline.is-visible .timeline__step:nth-child(1) .timeline__circle { animation-delay: 0.1s; }
.timeline.is-visible .timeline__step:nth-child(3) .timeline__circle { animation-delay: 0.25s; }
.timeline.is-visible .timeline__step:nth-child(5) .timeline__circle { animation-delay: 0.4s; }

.hpv-types__circle {
  transition: transform var(--duration-fast) var(--ease-out);
}

.hpv-types__item:hover .hpv-types__circle {
  transform: scale(1.12);
}

.thankyou__icon {
  animation: scaleIn 0.45s var(--ease-out) 0.1s both;
}

.thankyou__code {
  animation: fadeInUp 0.4s var(--ease-out) 0.25s both;
}

/* Bottom nav item tap */
.bottom-nav__item {
  transition:
    color var(--duration-fast) var(--ease-out),
    transform var(--duration-fast) var(--ease-out);
}

.bottom-nav__item:active {
  transform: scale(0.92);
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .hero__badge,
  .hero__title,
  .hero__desc,
  .hero__actions,
  .thankyou__icon,
  .thankyou__code,
  .impact-box.is-visible,
  .bar-chart__bar,
  .timeline__circle {
    animation: none;
    transform: none;
    opacity: 1;
  }

  .card:hover,
  .btn--primary:hover,
  .split__image:hover {
    transform: none;
  }
}