.main {
  width: 70%;
  height: 100vh;
  margin: auto;
}
.center {
  width: 100%;
  margin: 1em auto;
  text-align: center;
  font-size: 1.5em;
}
.button {
  margin:auto;
}
#start, #stop {
  width: 4em;
  border-radius: 5px;
  font-size: 1.5em;
}
#bee {
  display: none;
}
.md5List {
  width: 100%;
  height: 60%;
  overflow-y: scroll;
}