/* ── Base ── */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { overflow-x: hidden; }

/* ── Navbar scroll state ── */
nav.scrolled {
  background: rgba(6, 21, 38, 0.95);
  backdrop-filter: blur(12px);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

/* ── Service cards ── */
.service-card { cursor: default; }

/* ── Scroll reveal (progressive enhancement) ── */
@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
  }
  .reveal.visible {
    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; }
}

/* Fallback: always visible if JS is off or reduced motion */
.reveal { opacity: 1; transform: none; }
@media (prefers-reduced-motion: no-preference) {
  .reveal { opacity: 0; transform: translateY(30px); }
}

/* ── Mobile menu transition ── */
#mobile-menu {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}
#mobile-menu.open {
  max-height: 400px;
}

/* ── Button focus outlines ── */
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 2px solid #c9a84c;
  outline-offset: 2px;
}

/* ── Custom scrollbar ── */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #0a1f38; }
::-webkit-scrollbar-thumb { background: #1a4978; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #c9a84c; }