body {
  font-family: Arial, sans-serif;
  background: #f7f9fc;
  margin: 0;
  padding: 20px;
}
.container {
  max-width: 480px;
  margin: auto;
  background: white;
  padding: 20px;
  border-radius: 8px;
}
input {
  padding: 10px;
  margin-bottom: 10px;
  width: 100%;
}
button {
  padding: 10px;
  width: 100%;
  margin-bottom: 20px;
  background: #00b894;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}
ul {
  list-style-type: none;
  padding-left: 0;
}
li {
  padding: 10px;
  margin-bottom: 6px;
  background: #f1f2f6;
  border-radius: 4px;
}
.income {
  color: green;
}
.expense {
  color: #888;
}
h2 {
  margin-top: 30px;
}