duration_element.css in Duration Field 8

.form-type-duration .duration-inner-wrapper {
  display: -webkit-box;
  display: -moz-box;
  display: -ms-flexbox;
  display: -webkit-flex;
  display: flex;
  -webkit-flex-wrap: wrap;
  -moz-flex-wrap: wrap;
  -ms-flex-wrap: wrap;
  flex-wrap: wrap;
  -webkit-justify-content: flex-start;
  -moz-justify-content: flex-start;
  -ms-justify-content: flex-start;
  justify-content: flex-start;
  -ms-flex-pack: flex-start;
  margin: 0 -5px; }
  .form-type-duration .duration-inner-wrapper .form-type-number {
    padding: 0 5px;
    width: 5em; }
    .form-type-duration .duration-inner-wrapper .form-type-number input {
      box-sizing: border-box;
      width: 100%; }