#header {

  #sub-header > .subheader-fullwidth {
    width: 100%;
  }

  .module-subheader {

    .module-subheader-inner {
      padding: 0 5px;
    }
  }
}

@media (min-width: @screen-md-min) {
  #header {
    .module-subheader:not(.module-subheader-fullwidth) {
      .title:not(.extra-title) {
        margin-left: 0; // Because the padding of the 'inner' class below is now enough
      }

      .module-subheader-inner {
        padding: 0 15px;
      }
    }
  }
}