Steps to Reproduce

inspect a groupbox' position

Current Result

margin-right and margin-bottom overflow the parent element's boundary

Expected Result

the margin doesn't overflow the parent's boundary

Debug Information

• ZK renders "height:100%; width: 100%" on a groupbox
• consider another similar case

      <style>
          .z-groupbox {
              margin: 10px;
              display: inline;
          }
          .z-groupbox-content {
              background: white;
          }
      </style>
      <div vflex="1">
          <groupbox hflex="1" vflex="1"></groupbox>
          <groupbox hflex="1" vflex="1"></groupbox>
      </div>
  

  ZK renders height: calc(100% - 20px); on a groupbox which means it considers the margin.

Workaround

• width: calc(100% - 20px)!important; 15330-fix2.zul
• replace margin with the parent's padding 15330-fix3.zul