.text-label {
  font-family: Verdana, sans-serif;
}
.button {
  width: 175px;
  margin: 2px 0 2px 0;
}
#menu {
  margin: 0 0 10px 0;
}
#input-output {
  height: 250px;
}
#main-input {
  resize: none;
  width: 48.5%;
  height: 100%;
}
#main-output {
  resize: none;
  width: 48.5%;
  height: 100%;
  float: right;
}

@media (max-width: 768px) {
  #main-input, #main-output {
    width: 98%;
    float: none;
  }
}