.navbar-toggle {
  z-index: 3;
}

.navbar-default {
  background-color: #ffffff;
  background-image: none;
}

@media screen and (min-width:768px) {
  .navbar-brand-centered {
    position: absolute;
    left: 50%;
    display: block;
    width: 160px;
    text-align: center;
  }
}

@media screen and (min-width:768px) {
  .navbar > .container .navbar-brand-centered, .navbar > .container-fluid .navbar-brand-centered {
    margin-left: -80px;
  }
}