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

/* ─── Scroll Reveal (progressive enhancement) ─── */
@media (prefers-reduced-motion: no-preference) {
  .reveal-up,
  .reveal-left {
    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-left {
    transform: translateX(-32px);
  }
  .reveal-up.revealed,
  .reveal-left.revealed {
    opacity: 1;
    transform: translateY(0) translateX(0);
  }
}

/* ─── Navbar scroll state ─── */
#site-header.scrolled {
  background: rgba(26, 8, 22, 0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(74, 25, 66, 0.5);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

/* ─── Mobile menu ─── */
#mobile-menu.open { display: block; }
#mobile-menu { animation: slideDown 0.3s ease; }
@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ─── Mobile menu button animation ─── */
#menu-toggle[aria-expanded="true"] .menu-line:nth-child(1) {
  top: 50%; transform: translateY(-50%) rotate(45deg);
}
#menu-toggle[aria-expanded="true"] .menu-line:nth-child(2) {
  opacity: 0;
}
#menu-toggle[aria-expanded="true"] .menu-line:nth-child(3) {
  bottom: 50%; transform: translateY(50%) rotate(-45deg);
}

/* ─── Custom scrollbar ─── */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #1a0816; }
::-webkit-scrollbar-thumb { background: #4a1942; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #6d2746; }

/* ─── Selection ─── */
::selection { background: rgba(212, 168, 67, 0.3); color: #f5e9ed; }