/* ── Base & Utilities ── */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { overflow-x: hidden; }

/* ── Scroll Reveal ── */
.scroll-reveal {
  opacity: 1;
  transform: none;
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.scroll-reveal.revealed {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: no-preference) {
  .scroll-reveal {
    opacity: 0;
    transform: translateY(32px);
  }
  .scroll-reveal.revealed {
    opacity: 1;
    transform: translateY(0);
  }
  .scroll-reveal:nth-child(2) { transition-delay: 0.1s; }
  .scroll-reveal:nth-child(3) { transition-delay: 0.2s; }
  .scroll-reveal:nth-child(4) { transition-delay: 0.3s; }
  .scroll-reveal:nth-child(5) { transition-delay: 0.4s; }
  .scroll-reveal:nth-child(6) { transition-delay: 0.5s; }
}

/* ── Navbar scroll state ── */
.nav-scrolled {
  background: rgba(255, 255, 255, 0.97) !important;
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(0,0,0,0.06), 0 4px 20px rgba(0,0,0,0.06);
}
.nav-scrolled .nav-link { color: #334155; }
.nav-scrolled .nav-link:hover { color: #0d9488; }
.nav-scrolled .logo-text-primary { color: #0f172a; }

/* ── Custom Select Arrow ── */
select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}

/* ── Mobile menu animation ── */
#mobile-menu {
  animation: slideDown 0.25s ease;
}
@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ── Selection color ── */
::selection { background: #99f6e4; color: #042f2e; }

/* ── Focus visible ── */
:focus-visible { outline: 2px solid #0d9488; outline-offset: 2px; }

/* ── Smooth image loading ── */
img { loading: lazy; }