<div class="container">
  <div class="item">A</div>
  <div class="item">B</div>
  <div class="item">C</div>
</div>

  .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 150px;
    background: #f0f0f0;
  }

  .item {
    background: lightblue;
    margin: 4px;
    padding: 8px;
  }