@media (max-width: 1250px) {
  .site-header .nav.mobile-open,
  .site-header .nav.open {
    display: flex !important;
    position: absolute !important;
    top: 100%;
    left: 0;
    right: 0;
    width: auto;
    padding: 20px 24px;
    margin: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: #1a3524;
    border-top: 1px solid #ffffff33;
    box-shadow: 0 12px 24px #00000026;
    max-height: calc(100dvh - 110px);
    overflow-y: auto;
    z-index: 100;
  }
  .site-header .nav.mobile-open a,
  .site-header .nav.open a {
    display: block;
    color: #fff !important;
    font-family: 'Alumni Sans', sans-serif;
    font-size: 26px !important;
    font-weight: 600;
    line-height: 1.25;
    padding: 12px 0;
    white-space: normal;
    border-bottom: 1px solid #ffffff26;
  }
  .site-header .nav a:last-child { border-bottom: 0; }
  .menu-button[aria-expanded="true"] .menu-icon { transform: rotate(90deg); }
}