/* Keep navigation stable while optional CDN and application assets load. */
.soumu-header {
  position: sticky;
  top: 0;
  z-index: 1030;
  display: flex;
  align-items: center;
  flex-wrap: nowrap;
  flex-shrink: 0;
  min-height: 72px;
  gap: 16px;
  padding: 6px 16px;
}
.soumu-header .brand-mark { display: flex; flex-shrink: 0; }
.soumu-header .soumu-header-logo { width: 36px; height: 36px; object-fit: contain; }
.soumu-header-title { display: flex; align-items: center; gap: 8px; min-width: 0; }
.soumu-header-title > span:last-child { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.soumu-header-actions { display: flex; align-items: center; flex-shrink: 0; gap: 12px; margin-left: auto; }
.soumu-header .soumu-user { display: flex; align-items: center; gap: 10px; }
.soumu-header .dropdown { position: relative; }
.soumu-header .dropdown-menu:not(.show) { display: none; }
.soumu-header .dropdown-menu { position: absolute; top: 100%; right: 0; left: auto; margin: 0; list-style: none; }
@media (max-width: 767px) {
  .soumu-header { gap: 10px; padding-inline: 12px; }
  .soumu-header .soumu-welcome { display: none; }
}