.numbers {
      width:30px;
      border-right: 1px solid rgb(203 213 225);
      overflow: hidden;
      text-align: center;
      box-sizing: border-box;
      background:#130CB7;
      color:white;
      height:350px;
    }
.textarea {
      min-height: 350px;
      left:30px;
      padding: 5px;
      font-size: 16px;
      overflow-x: hidden;
      box-sizing: border-box;
      background:#1e1e1e;
      color:white;
      resize: none;
    }
.run{
    width:80px;
    height:30px;
    background-image:url('run.png');
    background-size: cover;
    cursor: pointer;
    }
.copy{
    margin-left:10px;
    width:80px;
    height:30px;
    background-image:url('copy.png');
    background-size: cover;
    cursor: pointer;
    }
#run_iframe{
    width:100%;
    height:100%;
    border:none;
    frameborder:none;
    background:#FCCF31;
    overflow: auto;
    }