dcat-admin2/resources/assets/dcat/sass/components/_box.scss

.box {
  position: relative;
  border-radius: .35rem;
  background: #ffffff;
  border-top: 2px solid $input-border-color;
  margin-bottom: 10px;
  width: 100%;
  box-shadow: $shadow;
  display: flex;

  .box-footer {
    border-top: 1px solid $divider-color;
  }
}
.box-header {
  padding: 13px;
  display: inherit;
  justify-content: space-between;

  h3, .h3 {
    font-size: 1.2rem;
    margin-bottom: 0;
  }
}

.box-header.with-border {
  border-bottom: 1px solid #f4f4f4;
}

.box, .panel {
  transition: .3s cubic-bezier(.25,.8,.5,1);
}

.box-shadow {
  box-shadow: 0 2px 4px 0 rgba(0,0,0,.05);
}

.box.box-solid {
  border-top: 0;
}

.box.box-solid.box-default {
  border: 1px solid $input-border-color;
}

.box-body {
  border-top-left-radius: 0;
  border-top-right-radius: 0;
  border-bottom-right-radius: 3px;
  border-bottom-left-radius: 3px;
  padding: 10px;
}

.box-footer {
  display: inherit;
  border-top-left-radius: 0;
  border-top-right-radius: 0;
  border-bottom-right-radius: 3px;
  border-bottom-left-radius: 3px;
  padding: 10px;
}