#numdice {
  font-size: 2em;
  width: 100px;
  text-align: center;
}

#rollbtn {
  font-size: 2em;
  padding: 8px 32px;
}

.output tbody tr:nth-child(even) {
  background-color: #e6e6e6;
}

#history {
  min-width: 33%;
}

.num {
  text-align: center;
  padding: 0 4px;
}

tr th {
  border-bottom: 1px dotted #444;
}

#history tr th:nth-child(2), #history tr td:nth-child(2) {
  border-right: 1px solid #444;
}

.footer {
  font-size: 0.5em;
  text-align: center;
  width: 100%;
}