/* Shared responsive header nav — a checkbox-driven burger menu, no
   JavaScript required. Works alongside index.html's inline header
   styles and contact.html/consulting.html's .site-header class rules;
   it only overrides layout at the mobile breakpoint. Used by
   index.html, contact.html and consulting.html. */

.nav-toggle {
  display: none;
}

.nav-toggle-label {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  cursor: pointer;
  flex: none;
}
.nav-toggle-label span {
  display: block;
  height: 2px;
  background: var(--dg-ink);
  border-radius: 1px;
  transition: transform .2s ease, opacity .2s ease;
}
.nav-toggle:checked ~ .nav-toggle-label span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle:checked ~ .nav-toggle-label span:nth-child(2) { opacity: 0; }
.nav-toggle:checked ~ .nav-toggle-label span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 860px) {
  .nav-toggle-label { display: flex; }

  .site-header nav {
    position: fixed !important;
    top: 76px !important;
    left: 0 !important;
    right: 0 !important;
    margin: 0 !important;
    flex-direction: column !important;
    align-items: stretch !important;
    gap: 0 !important;
    background: var(--dg-paper) !important;
    border-bottom: var(--bw-rule) solid var(--dg-ink);
    max-height: 0;
    overflow: hidden;
    transition: max-height .25s ease;
    padding: 0 !important;
  }
  .site-header nav a {
    padding: 16px var(--sp-10) !important;
    border-bottom: 1px solid var(--dg-n-200);
    width: 100%;
  }
  .site-header nav a.cta {
    margin: 16px var(--sp-10) !important;
    width: auto;
    display: inline-flex !important;
    justify-content: center;
    border-bottom: none !important;
  }
  .nav-toggle:checked ~ nav {
    max-height: 600px;
  }
}