css

[css마스터(114.203)]

<div style="display: flex; flex: 1; background: blue;">

  <div style="margin: auto auto; display: flex; flex-wrap: wrap; gap: 10px; width: 320px;">

    <div style="width: 100px; height: 100px; background: red"></div>

    <div style="width: 100px; height: 100px; background: red"></div>

    <div style="width: 100px; height: 100px; background: red"></div>

    <div style="width: 100px; height: 100px; background: red"></div>

  </div>

</div>