@media (max-width: 900px) {
  .header-in { position: relative; }
  .nav.open {
    display: flex;
    position: absolute;
    top: 68px;
    right: 0;
    min-width: 220px;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px;
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 16px;
    box-shadow: var(--shadow);
  }
  .nav.open a {
    min-height: 44px;
    display: flex;
    align-items: center;
    padding: 0 14px;
    border-radius: 10px;
  }
  .nav.open a:hover { background: var(--pale); }
}