/* ============================================================
   animations.css — keyframes + утиліти scroll-reveal
   ============================================================ */

/* ===================== KEYFRAMES ===================== */
@keyframes spin { to { transform: rotate(360deg); } }

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

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

/* Повільне обертання mesh-градієнта в hero */
@keyframes mesh-rotate {
  to { transform: rotate(360deg); }
}

/* Дрейф фонових плям */
@keyframes drift-1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(60px, -40px) scale(1.1); }
  66% { transform: translate(-30px, 50px) scale(0.95); }
}
@keyframes drift-2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-70px, 60px) scale(1.15); }
}
@keyframes drift-3 {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(50px, 40px); }
}

/* Subtle-пульсація CTA */
@keyframes cta-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(19, 121, 91, 0.32); }
  50% { box-shadow: 0 0 0 14px rgba(19, 121, 91, 0); }
}

/* Поява слів у hero */
@keyframes word-rise {
  from { opacity: 0; transform: translateY(0.5em); }
  to { opacity: 1; transform: translateY(0); }
}

/* Малювання галочки в чекбоксі калькулятора */
@keyframes draw-check {
  to { stroke-dashoffset: 0; }
}

/* ===================== SCROLL-REVEAL ===================== */
.reveal {
  opacity: 0;
  transition: opacity var(--dur-reveal) var(--ease-out),
              transform var(--dur-reveal) var(--ease-out);
  will-change: opacity, transform;
}
.reveal--up { transform: translateY(36px); }
.reveal--left { transform: translateX(-36px); }
.reveal--right { transform: translateX(36px); }
.reveal--scale { transform: scale(0.94); }
.reveal--fade { transform: none; }

.reveal.is-revealed {
  opacity: 1;
  transform: translate(0, 0) scale(1);
}

/* Стаггер для дітей контейнера */
.reveal--stagger > * {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--dur-reveal) var(--ease-out),
              transform var(--dur-reveal) var(--ease-out);
}
.reveal--stagger.is-revealed > * {
  opacity: 1;
  transform: translateY(0);
}
.reveal--stagger.is-revealed > *:nth-child(1) { transition-delay: 0.05s; }
.reveal--stagger.is-revealed > *:nth-child(2) { transition-delay: 0.10s; }
.reveal--stagger.is-revealed > *:nth-child(3) { transition-delay: 0.15s; }
.reveal--stagger.is-revealed > *:nth-child(4) { transition-delay: 0.20s; }
.reveal--stagger.is-revealed > *:nth-child(5) { transition-delay: 0.25s; }
.reveal--stagger.is-revealed > *:nth-child(6) { transition-delay: 0.30s; }
.reveal--stagger.is-revealed > *:nth-child(7) { transition-delay: 0.35s; }
.reveal--stagger.is-revealed > *:nth-child(8) { transition-delay: 0.40s; }

/* Анімація появи елементів інтерфейсу одразу (без скролу) */
.anim-fade-up { animation: fade-up var(--dur-reveal) var(--ease-out) both; }

/* Декоративна іконка-картка крутиться на hover */
.spin-on-hover { transition: transform 0.5s var(--ease-out); }
.card--hover:hover .spin-on-hover { transform: rotate(360deg); }

/* ===================== PREFERS-REDUCED-MOTION ===================== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .reveal,
  .reveal--stagger > * {
    opacity: 1 !important;
    transform: none !important;
  }
}