body {
  background-color: lightsteelblue;
  color: black;
}

.variable {
  width: 50px;
  text-align: right;
}

button {
  background-color: steelblue;
  padding: 10px;  color:white;
}
#solving {
  background-color: green;
}

#buttonSection{
  min-width:159px;
}