.tabulator .tabulator-header .tabulator-col {
    display: inline-block;
    position: relative;
    box-sizing: border-box;
    border-right: 1px solid #aaa;
    background-color: #222;
    text-align: left;
    vertical-align: bottom;
    overflow: hidden;
}

.tabulator .tabulator-header {
    position: relative;
    box-sizing: border-box;
    width: 100%;
    border-bottom: 3px solid #3FB449;
    background-color: #222;
    color: #fff;
    font-weight: bold;
    white-space: nowrap;
    overflow: hidden;
    -moz-user-select: none;
    -khtml-user-select: none;
    -webkit-user-select: none;
    -o-user-select: none;
}

.button {
    border: none;
    color: white;
    padding: 10px 20px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    margin: 4px 2px;
    cursor: pointer;
    background: red;
  }