h: 120px;
    height: 120px;

    column-rule-color: blue;
    column-rule-style: solid;
    column-rule-width: 5px;

    row-rule-color: red;
    row-rule-style: solid;
    row-rule-width: 5px;
  }

  .item {
    background: gray;
    opacity: 0.5;
  }
</style>

<body>
  <div class="grid-container">
    <div class="item"></div>
    <div class="item"></div>
    <div class="item"></div>
    <div class="item"></div>
    <div class="item"></div>
    <div class="item"></div>
    <div class="item"></div>
    <di