/* ─── Base & Utilities ─── */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; }

/* ─── Scrollbar ─── */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #072419; }
::-webkit-scrollbar-thumb { background: #1f452a; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #2a5a37; }

/* ─── Navbar ─── */
#navbar {
  background: transparent;
  transition: background 0.4s ease, box-shadow 0.4s ease, backdrop-filter 0.4s ease;
}
#navbar.scrolled {
  background: rgba(3, 18, 12, 0.85);
  backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 rgba(201, 168, 76, 0.08);
}

/* ─── Mobile menu lines ─── */
.menu-line { transition: transform 0.3s ease, opacity 0.3s ease; }
#mobileMenu.open .menu-line:nth-child(1) { transform: rotate(45deg) translate(4px, 4px); }
#mobileMenu.open .menu-line:nth-child(2) { opacity: 0; }
#mobileMenu.open .menu-line:nth-child(3) { transform: rotate(-45deg) translate(4px, -4px); width: 20px; margin-left: 4px; }

/* ─── Reveal animations (progressive enhancement) ─── */
@media (prefers-reduced-motion: no-preference) {
  .reveal-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
  }
  .reveal-left {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
  }
  .reveal-right {
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
  }
  .reveal-up.visible,
  .reveal-left.visible,
  .reveal-right.visible {
    opacity: 1;
    transform: translate(0, 0);
  }
}

/* ─── Gold shimmer on buttons ─── */
@keyframes shimmer {
  0% { background-position: -200% center; }
  100% { background-position: 200% center; }
}