body {
  font-family: Arial, sans-serif;
  margin: 20px;
}

main {
  max-width: 900px;
  margin: 0 auto;
}

h1 {
  text-align: center;
  color: #333;
  margin-bottom: 20px;
}

h2 {
  color: #444;
  margin-bottom: 10px;
}

input {
  margin: 5px;
  padding: 5px;
  border: 1px solid #ccc;
}

button {
  margin: 5px;
  padding: 5px 10px;
  background-color: #4caf50;
  color: white;
  border: none;
  cursor: pointer;
}

button:hover {
  background-color: #45a049;
}

table {
  margin-top: 10px;
  border-collapse: collapse;
  width: 100%;
}

th,
td {
  border: 1px solid #ddd;
  padding: 8px;
  text-align: left;
}

th {
  background-color: #f2f2f2;
}