.main-header {
  background: $white-color;
  min-height: 60px;
  width: calc(100% - 250px);
  position: fixed;
  z-index: 1001;
  .navbar-header {
    min-height: 70px;
    .btn-toggle {
      margin-right: 30px;
      margin-left: 20px;
    }
  }
}

#search-nav {
  flex: 1;
  max-width: 300px;
  transition: all .4s;
  &.focus {
    max-width: 400px;
  }
}