doc/dev/plugins/flex-objects/scss/plugin/_site.scss

#flex-objects {

  .text-center {
    text-align: center;
  }

  .search {
    display: inline-block;
    width: 50%;
    padding: 0.7rem;
  }

  button.sort {
    vertical-align: top;

    &:after {
      font-family: FontAwesome;
    }
    &.asc:after {
      content: "\2191";
    }
    &.desc:after {
      content: "\2193";
    }
  }

  ul {
    margin: 3rem 0;

    li {
      display: inline-block;
      width: 33%;
      margin: 1rem 0;

      .entry-details {

        .name {
          font-weight: bold;
          font-size: 120%;
        }
        p {
          margin: 0;
        }
      }

      .entry-extra {
        span {
          background: #eee;
          border-radius: 4px;
          padding: 3px 5px;
          font-size: 85%;
        }
      }
    }
  }
}

@media only screen and (max-width: 800px) {
  #flex-objects ul li {
    width: 50%;
  }
}

@media only screen and (max-width: 500px) {
  #flex-objects ul li {
    width: 100%;
  }
}