body {
  font-family: sans-serif;
  padding: 10px;
  background: #f4f4f4;
}
h1 {
  font-size: 24px;
}
select, input[type="number"] {
  font-size: 18px;
  padding: 10px;
  margin: 5px 0;
  width: 100%;
}
.set-row {
  display: flex;
  gap: 10px;
  margin-bottom: 10px;
}
.set-row input {
  flex: 1;
}
label {
  font-weight: bold;
  margin-top: 10px;
  display: block;
}
button {
  font-size: 18px;
  padding: 12px;
  width: 100%;
  margin-top: 20px;
  background: #4caf50;
  color: white;
  border: none;
  border-radius: 5px;
}