<style>
    body {
      font-family: Arial;
    }

    * {
      box-sizing: border-box;
    }

    .dot {
      height: 12px;
      width: 12px;
      background-color: #bbb;
      border-radius: 50%;
      display: inline-block;
    }

    .container_browser {
      border: 3px solid #f1f1f1;
      border-top-left-radius: 4px;
      border-top-right-radius: 4px;
    }

    .top {
      padding: 10px;
      background: #f1f1f1;
      border-top-left-radius: 4px;
      border-top-right-radius: 4px;
    }

    .content_browser {
      padding: 10px;
    }
  </style>

