/* ===========================================================
   MOBILE NAV — SHARED
   Hamburger menu + drawer used across all pages with a nav.
   Activated at narrow widths (≤ 640px).
   =========================================================== */

/* Hamburger toggle button — hidden by default at wide widths */
.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  position: relative;
  z-index: 102;
}
.nav-toggle-line {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--cream);
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* Mobile nav drawer — hidden by default */
.nav-drawer {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0;
  background: var(--ink);
  padding: 6rem 1.5rem 2.5rem;
  z-index: 101;
  transform: translateY(-100%);
  transition: transform 0.4s ease;
}
.nav-drawer.is-open {
  transform: translateY(0);
}
.nav-drawer-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.nav-drawer-links a {
  display: block;
  padding: 0.5rem 0;
  font-family: var(--sans);
  font-size: 1.1rem;
  font-weight: 300;
  letter-spacing: 0.05em;
  color: var(--cream);
  text-decoration: none;
  border-bottom: 1px solid rgba(252, 248, 240, 0.08);
  transition: color 0.3s ease;
}
.nav-drawer-links a:hover { color: var(--bronze-soft); }
.nav-drawer-cta {
  margin-top: 0.5rem;
  color: var(--bronze-soft) !important;
  text-transform: uppercase;
  letter-spacing: 0.18em !important;
  font-size: 0.85rem !important;
  border-bottom: none !important;
}

/* Narrow viewport: hide regular nav links, show hamburger */
@media (max-width: 640px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .nav-drawer { display: block; }
}