body {
  font-family: Arial, sans-serif;
  max-width: 500px;
  margin: 40px auto;
}

label, input, button {
  display: block;
  margin: 10px 0;
  width: 100%;
  padding: 8px;
}

.history {
  margin-top: 30px;
}

.workout {
  border-bottom: 1px solid #ccc;
  padding: 10px 0;
}