*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
  background-color: #0f172a;
  color: #f8fafc;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* NAV */
#nav.scrolled {
  background: rgba(15, 23, 42, 0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(148, 163, 184, 0.08);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

/* Mobile menu */
#mobileMenu.open { opacity: 1; pointer-events: auto; }
.mobile-link { transition: opacity 0.2s, color 0.2s; }
#mobileMenu.open .mobile-link { opacity: 1; }

/* Service cards */
.service-card {
  background: rgba(30, 41, 59, 0.6);
  border: 1px solid rgba(100, 116, 139, 0.2);
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
.service-card:hover {
  border-color: rgba(20, 184, 166, 0.4);
  box-shadow: 0 8px 40px rgba(13, 148, 136, 0.12);
}

/* Gallery */
.gallery-item {
  cursor: pointer;
  position: relative;
}
.gallery-item::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(15, 23, 42, 0.4) 0%, transparent 50%);
  opacity: 0;
  transition: opacity 0.3s ease;
  border-radius: inherit;
}
.gallery-item:hover::after { opacity: 1; }

/* Scroll reveal (progressive enhancement) */
@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
  }
  .reveal.revealed {
    opacity: 1;
    transform: translateY(0);
  }
  .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; }
}

/* Form select arrow */
select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' 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 12px center;
  padding-right: 40px;
}

/* Custom scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #0f172a; }
::-webkit-scrollbar-thumb { background: #334155; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #475569; }

/* Selection */
::selection { background: rgba(20, 184, 166, 0.3); color: #f0fdfa; }
</style>