body {
  background-color: black;
  color: white;
  font-family: Verdana;
}

button {
  font-size: 23px;
  border: white 2px solid;
  background-color: black;
  color: white;
  font-family: Verdana;
  cursor: pointer;
}

.lm {
  margin-left: 10px; 
}
.rm {
  
  margin-left: -10px; 
}