<style>
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
}

/* The grid: Three equal columns that floats next to each other */
.column {
  float: left;
  width: 100%;
  padding: 5px;
  text-align: left;
  font-size: 14px;
  cursor: pointer;
//  color: white;
}

.containerTab {
  padding: 20px;
  //color: white;
}

/* Clear floats after the columns */
.row:after {
  content: "";
  display: table;
  clear: both;
}

/* Closable button inside the container tab */
.closebtn {
  float: right;
  color: #999999;
  font-size: 35px;
  cursor: pointer;
}
</style>