.mobile-nav { display: none; }
.desktop-nav a[aria-current="page"] { color: var(--blue); }
@media (max-width: 900px) {
  .site-header .header-inner { gap: 12px; }
  .mobile-nav { display: block; margin-left: auto; position: relative; }
  .mobile-nav summary {
    cursor: pointer;
    list-style: none;
    padding: 10px 14px;
    border: 1px solid var(--line);
    border-radius: 12px;
    color: var(--ink);
    background: #fff;
    font-size: 14px;
    font-weight: 750;
  }
  .mobile-nav summary::-webkit-details-marker { display: none; }
  .mobile-nav-panel {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    z-index: 20;
    display: grid;
    width: min(280px, calc(100vw - 32px));
    padding: 10px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: #fff;
    box-shadow: 0 18px 48px rgba(11, 21, 48, .18);
  }
  .mobile-nav-panel a {
    padding: 12px;
    border-radius: 10px;
    color: var(--ink);
    font-size: 15px;
    font-weight: 700;
    text-decoration: none;
  }
  .mobile-nav-panel a:hover,
  .mobile-nav-panel a:focus-visible { background: var(--paper); color: var(--blue); }
}