/* ============================================
   ANIMATIONS: Entrance, glow, scroll-driven
   Custom easing per Emil Kowalski's design-eng playbook.
   ============================================ */

:root {
  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  --ease-in-out: cubic-bezier(0.77, 0, 0.175, 1);
  --ease-drawer: cubic-bezier(0.32, 0.72, 0, 1);
}

/* --- Hero entrance --- */
.hero__title,
.hero__subtitle,
.hero__eventmeta {
  opacity: 0;
  transform: translateY(24px);
  animation: heroFadeUp 800ms var(--ease-out) forwards;
}
.hero__title     { animation-delay: 180ms; }
.hero__subtitle  { animation-delay: 320ms; }
.hero__eventmeta { animation-delay: 460ms; }

.hero__cta.btn--shiny {
  opacity: 0;
  transform: translateY(24px);
  animation:
    heroFadeUp 800ms var(--ease-out) 560ms forwards,
    shinyGradientAngle var(--shiny-duration) linear infinite;
}

@keyframes heroFadeUp {
  to { opacity: 1; transform: translateY(0); }
}

/* --- Scroll reveal (Emil: transitions, not keyframes; transform+opacity only) --- */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 550ms var(--ease-out), transform 550ms var(--ease-out);
  will-change: transform, opacity;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 60ms; }
.reveal-delay-2 { transition-delay: 120ms; }
.reveal-delay-3 { transition-delay: 180ms; }
.reveal-delay-4 { transition-delay: 240ms; }
.reveal-delay-5 { transition-delay: 300ms; }
.reveal-delay-6 { transition-delay: 360ms; }

/* --- Stagger: pillar cards (siblings in a row) --- */
.pillars__row .pillar-card.reveal:nth-child(1) { transition-delay: 0ms; }
.pillars__row .pillar-card.reveal:nth-child(2) { transition-delay: 70ms; }
.pillars__row .pillar-card.reveal:nth-child(3) { transition-delay: 140ms; }
.pillars__row .pillar-card.reveal:nth-child(4) { transition-delay: 210ms; }

/* --- Expert cards: same motion language as speakers --- */
.experts__grid .expert-card.reveal {
  opacity: 1;
  transform: none;
  transition: none;
}
.experts__grid .expert-card.reveal .expert-card__photo {
  clip-path: inset(100% 0 0 0);
  transition: clip-path 1000ms var(--ease-out);
}
.experts__grid .expert-card.reveal .expert-card__photo img {
  transform: scale(1.12);
  transition: transform 1400ms var(--ease-out);
}
.experts__grid .expert-card.reveal .expert-card__name,
.experts__grid .expert-card.reveal .expert-card__role,
.experts__grid .expert-card.reveal .expert-card__bio,
.experts__grid .expert-card.reveal .expert-card__link {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 550ms var(--ease-out), transform 550ms var(--ease-out);
}
.experts__grid .expert-card.reveal.is-visible .expert-card__photo {
  clip-path: inset(0 0 0 0);
}
.experts__grid .expert-card.reveal.is-visible .expert-card__photo img {
  transform: scale(1);
}
.experts__grid .expert-card.reveal.is-visible .expert-card__name,
.experts__grid .expert-card.reveal.is-visible .expert-card__role,
.experts__grid .expert-card.reveal.is-visible .expert-card__bio,
.experts__grid .expert-card.reveal.is-visible .expert-card__link {
  opacity: 1;
  transform: translateY(0);
}
.experts__grid .expert-card.reveal:nth-child(2) .expert-card__photo { transition-delay: 140ms; }
.experts__grid .expert-card.reveal:nth-child(2) .expert-card__photo img { transition-delay: 140ms; }
.experts__grid .expert-card.reveal:nth-child(1) .expert-card__name      { transition-delay: 280ms; }
.experts__grid .expert-card.reveal:nth-child(1) .expert-card__role      { transition-delay: 340ms; }
.experts__grid .expert-card.reveal:nth-child(1) .expert-card__bio       { transition-delay: 400ms; }
.experts__grid .expert-card.reveal:nth-child(1) .expert-card__link      { transition-delay: 460ms; }
.experts__grid .expert-card.reveal:nth-child(2) .expert-card__name      { transition-delay: 420ms; }
.experts__grid .expert-card.reveal:nth-child(2) .expert-card__role      { transition-delay: 480ms; }
.experts__grid .expert-card.reveal:nth-child(2) .expert-card__bio       { transition-delay: 540ms; }
.experts__grid .expert-card.reveal:nth-child(2) .expert-card__link      { transition-delay: 600ms; }

/* --- Speaker cards: custom entrance (text fades up, photo clips in) --- */
.speakers__grid .speaker-card.reveal {
  opacity: 1;
  transform: none;
  transition: none;
}
.speakers__grid .speaker-card.reveal .speaker-card__photo-wrap {
  clip-path: inset(100% 0 0 0);
  transition: clip-path 900ms var(--ease-out);
}
.speakers__grid .speaker-card.reveal .speaker-card__photo-wrap img {
  transform: scale(1.12);
  transition: transform 1200ms var(--ease-out);
}
.speakers__grid .speaker-card.reveal .speaker-card__name,
.speakers__grid .speaker-card.reveal .speaker-card__role {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 500ms var(--ease-out), transform 500ms var(--ease-out);
}
.speakers__grid .speaker-card.reveal.is-visible .speaker-card__photo-wrap {
  clip-path: inset(0 0 0 0);
}
.speakers__grid .speaker-card.reveal.is-visible .speaker-card__photo-wrap img {
  transform: scale(1);
}
.speakers__grid .speaker-card.reveal.is-visible .speaker-card__name,
.speakers__grid .speaker-card.reveal.is-visible .speaker-card__role {
  opacity: 1;
  transform: translateY(0);
}
/* Stagger by column */
.speakers__grid .speaker-card.reveal:nth-child(1) .speaker-card__photo-wrap { transition-delay: 0ms; }
.speakers__grid .speaker-card.reveal:nth-child(2) .speaker-card__photo-wrap { transition-delay: 80ms; }
.speakers__grid .speaker-card.reveal:nth-child(3) .speaker-card__photo-wrap { transition-delay: 160ms; }
.speakers__grid .speaker-card.reveal:nth-child(4) .speaker-card__photo-wrap { transition-delay: 240ms; }
.speakers__grid .speaker-card.reveal:nth-child(5) .speaker-card__photo-wrap { transition-delay: 320ms; }
.speakers__grid .speaker-card.reveal:nth-child(6) .speaker-card__photo-wrap { transition-delay: 400ms; }
.speakers__grid .speaker-card.reveal:nth-child(1) .speaker-card__photo-wrap img { transition-delay: 0ms; }
.speakers__grid .speaker-card.reveal:nth-child(2) .speaker-card__photo-wrap img { transition-delay: 80ms; }
.speakers__grid .speaker-card.reveal:nth-child(3) .speaker-card__photo-wrap img { transition-delay: 160ms; }
.speakers__grid .speaker-card.reveal:nth-child(4) .speaker-card__photo-wrap img { transition-delay: 240ms; }
.speakers__grid .speaker-card.reveal:nth-child(5) .speaker-card__photo-wrap img { transition-delay: 320ms; }
.speakers__grid .speaker-card.reveal:nth-child(6) .speaker-card__photo-wrap img { transition-delay: 400ms; }
.speakers__grid .speaker-card.reveal:nth-child(1) .speaker-card__name,
.speakers__grid .speaker-card.reveal:nth-child(1) .speaker-card__role { transition-delay: 200ms; }
.speakers__grid .speaker-card.reveal:nth-child(2) .speaker-card__name,
.speakers__grid .speaker-card.reveal:nth-child(2) .speaker-card__role { transition-delay: 280ms; }
.speakers__grid .speaker-card.reveal:nth-child(3) .speaker-card__name,
.speakers__grid .speaker-card.reveal:nth-child(3) .speaker-card__role { transition-delay: 360ms; }
.speakers__grid .speaker-card.reveal:nth-child(4) .speaker-card__name,
.speakers__grid .speaker-card.reveal:nth-child(4) .speaker-card__role { transition-delay: 440ms; }
.speakers__grid .speaker-card.reveal:nth-child(5) .speaker-card__name,
.speakers__grid .speaker-card.reveal:nth-child(5) .speaker-card__role { transition-delay: 520ms; }
.speakers__grid .speaker-card.reveal:nth-child(6) .speaker-card__name,
.speakers__grid .speaker-card.reveal:nth-child(6) .speaker-card__role { transition-delay: 600ms; }

/* --- Press feedback on interactive surfaces --- */
.btn,
.btn--shiny,
.nav__cta,
.register__submit,
button[type="submit"] {
  transition: transform 160ms var(--ease-out);
}
.btn:active,
.btn--shiny:active,
.nav__cta:active,
.register__submit:active,
button[type="submit"]:active {
  transform: scale(0.97);
}

.expert-card__link {
  transition: color 300ms var(--ease-out),
              border-color 300ms var(--ease-out),
              box-shadow 300ms var(--ease-out),
              transform 200ms var(--ease-out);
}
.expert-card__link:active { transform: scale(0.94); }

/* --- Respect reduced motion --- */
@media (prefers-reduced-motion: reduce) {
  .hero__title, .hero__subtitle, .hero__eventmeta, .hero__cta.btn--shiny {
    animation: none; opacity: 1; transform: none;
  }
  .reveal { transition: opacity 200ms ease; transform: none; }
  .reveal.is-visible { transform: none; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 150ms !important;
  }
}