AdminLTE/build/scss/_header.scss

/*
 * Component: Main Header
 * ----------------------
 */

.main-header {
  position: relative;
  z-index: $zindex-navbar;

  > .navbar {
    //margin-left: $sidebar-width;
    //height: 55px;
  }
/*
  > .logo {
    width: $sidebar-width;
    padding: 0 15px;
    text-align: center;
    float: left;
    font-size: 18px;
    height: 55px;
    line-height: 55px;
  }*/
}

.content-header {
  padding: 15px;
  h1 {
    font-size: 1.8rem;
    margin: 0;

  }
  .breadcrumb {
    margin-bottom: 0;
    padding: 0;
    background: transparent;
    font-size: 1rem;
  }
}