/* ============================================================
   ANIMATIONS
   Scroll-triggered reveal system + entrance transitions
   ============================================================ */

/* ---- Reveal base state (hidden) ---- */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.75s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.75s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal--delay-1 { transition-delay: 0.1s; }
.reveal--delay-2 { transition-delay: 0.2s; }
.reveal--delay-3 { transition-delay: 0.3s; }
.reveal--delay-4 { transition-delay: 0.4s; }

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

/* ---- Hero section: reveal on load (no IntersectionObserver) ---- */
.hero .reveal {
  animation: heroFadeUp 0.9s cubic-bezier(0.4, 0, 0.2, 1) both;
}

.hero .reveal--delay-1 { animation-delay: 0.12s; }
.hero .reveal--delay-2 { animation-delay: 0.22s; }
.hero .reveal--delay-3 { animation-delay: 0.34s; }
.hero .reveal--delay-4 { animation-delay: 0.46s; }

@keyframes heroFadeUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---- Nav scroll shadow ---- */
.nav {
  transition: box-shadow 0.3s ease;
}

/* ---- Service card line underline ---- */
.service-card::after {
  transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---- Portrait hover lift ---- */
.hero__portrait {
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1),
              box-shadow 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.hero__portrait:hover {
  transform: translateY(-4px);
  box-shadow: 0 28px 72px rgba(31, 27, 23, 0.38);
}

/* ---- Image break parallax hint ---- */
.image-break__img {
  transition: transform 0.1s linear;
}

/* ---- Nav link underline draw ---- */
.nav__link::after {
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---- Button press micro-interaction ---- */
.btn {
  transition: background 0.28s ease,
              color 0.28s ease,
              border-color 0.28s ease,
              transform 0.14s ease;
}

.btn:active {
  transform: scale(0.97);
}

/* ---- Hamburger open state ---- */
.nav__toggle.open span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.nav__toggle.open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.nav__toggle.open span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* ---- Reduce motion accessibility ---- */
@media (prefers-reduced-motion: reduce) {
  .reveal,
  .reveal.is-visible,
  .hero .reveal {
    transition: none !important;
    animation: none !important;
    opacity: 1;
    transform: none;
  }

  .btn,
  .service-card::after,
  .hero__portrait,
  .nav__link::after {
    transition: none !important;
  }
}