/* ── Base & Utilities ── */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { margin: 0; }
img { display: block; max-width: 100%; }

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

/* ── Navbar scroll state ── */
#navbar.scrolled {
  background: rgba(6, 13, 23, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(45, 212, 191, 0.1);
}

/* ── Mobile menu ── */
#mobile-menu.open {
  opacity: 1;
  pointer-events: all;
}

/* ── Custom scrollbar ── */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #060d17; }
::-webkit-scrollbar-thumb { background: #1e3450; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #2d4a6b; }

/* ── Selection ── */
::selection { background: rgba(45, 212, 191, 0.3); color: #f0f4f8; }