body {
    font-family: Arial, sans-serif;
    background-color: rgba(137, 43, 226, 0.326);
  }
  .container{
    width: 100%;
    height: 100vh;
    justify-content: center;
    align-items: center;
    background-color: rgba(221, 19, 59, 0.326);

h1 {
  text-align: center;
}

form, #transaction-list, #balance {
  margin: 20px auto;
  max-width: 400px;
}

input, select, button {
  display: block;
  margin-bottom: 10px;
  width: 100%;
}

button {
  padding: 10px;
}

#transaction-list ul {
  list-style-type: none;
  padding: 0;
}

.income {
  color: green;
}

.expense {
  color: red;
}