/* ── Base ── */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { margin: 0; -webkit-font-smoothing: antialiased; }

/* ── Nav link underline animation ── */
.nav-link {
  position: relative;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: currentColor;
  transition: width 0.3s ease;
}
.nav-link:hover::after {
  width: 100%;
}

/* ── Hero animations ── */
.hero-subtitle {
  opacity: 0;
  animation: fadeUp 0.8s 0.2s forwards;
}
.hero-headline {
  opacity: 0;
  animation: fadeUp 0.8s 0.4s forwards;
}
.hero-body {
  opacity: 0;
  animation: fadeUp 0.8s 0.6s forwards;
}
.hero-cta {
  opacity: 0;
  animation: fadeUp 0.8s 0.8s forwards;
}

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

/* ── Scroll reveal (progressive enhancement) ── */
@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(32px);
    transition: opacity 0.7s ease, transform 0.7s ease;
  }
  .reveal.revealed {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Default state: always visible even without JS */
.reveal {
  opacity: 1;
  transform: none;
  transition: none;
}

/* ── Button hover shimmer ── */
.btn-primary, .btn-secondary {
  position: relative;
  overflow: hidden;
}
.btn-primary::before, .btn-secondary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
  transition: left 0.5s ease;
}
.btn-primary:hover::before, .btn-secondary:hover::before {
  left: 100%;
}

/* ── Header scrolled state ── */
#site-header.scrolled {
  background: rgba(250, 249, 246, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(45, 80, 43, 0.08);
}

/* ── Mobile menu transition ── */
#mobile-nav {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}
#mobile-nav.open {
  max-height: 400px;
}

/* ── Focus visible ── */
:focus-visible {
  outline: 2px solid #28402b;
  outline-offset: 2px;
}

/* ── Selection ── */
::selection {
  background: #28402b;
  color: #faf9f6;
}

/* ── Gallery image caption on hover ── */
.reveal.relative {
  overflow: hidden;
}
.reveal.relative img {
  transition: transform 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.reveal.relative:hover img {
  transform: scale(1.05);
}

/* ── Smooth scroll offset for fixed header ── */
section[id] {
  scroll-margin-top: 80px;
}