gistfile1.css

html, body {
  height: 100%;
}
 
#sidebar {
  position: relative;
  float: left;
  height: 100%;
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -webkit-flex-direction: column;
      -ms-flex-direction: column;
          flex-direction: column;
}

#calendar {
  min-height: 140px
}

#options {
  min-height: 65px
}