/* Shrink parent containers */
header .main-nav,
header .main-nav .header-menu {
  width: auto !important;      /* shrink to content */
  flex: 0 0 auto !important;   /* do not stretch */
  display: flex !important;
  flex-direction: row !important;
  flex-wrap: nowrap !important;
  align-items: center;
}

/* UL stays horizontal */
header .main-nav .header-menu ul.nav {
  display: flex !important;
  flex-wrap: nowrap !important;
  gap: 20px;
  margin: 0;
  padding: 0;
  list-style: none;
  white-space: nowrap;
}

/* LI and anchors */
header .main-nav .header-menu ul.nav > li {
  flex: 0 0 auto !important;
}

header .main-nav .header-menu ul.nav > li > a {
  display: inline-block !important;
  white-space: nowrap;
  padding: 10px 15px;
}