.chart {
    min-height: 150px;
}

button.close {
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 1;
    color: #000;
    text-shadow: 0 1px 0 #fff;
    opacity: .5;
    background-color: transparent;
    border: 0;
    padding: 1rem;
    margin: -1rem -1rem -1rem auto;
    cursor: pointer;	
  }