body, button {
  font-family: 'Karla', sans-serif;
}

span {
  font-family: 'Roboto Mono', monospace;
}

.container {
  width: 60%;
  display: block;
  margin: 70px auto;
}

.button {
  border: none;
  border-radius: 7px;
  color: #fff;
  background: #3385ff;
  padding: 10px;
}

.result {
  font-size: 50px;
}

form {
  width: 600px;
  /*margin: 0 auto;*/
}

label {
  font-weight: bold;
  margin-bottom: 5px;
}

label:not(:last-of-type) {
  display: block;
}



input {
  width: 100%;
  border-radius: 5px;
  border: 1px solid grey;
  padding: 10px;
  margin-bottom: 20px;
  font-size: 15px;
  box-sizing: border-box;
}

input:last-of-type {
  margin: 20px auto;
}