body {
  font-family: Arial, sans-serif;
  margin: 20px;
  background: #f9f9f9;
  color: #333;
}
h1 {
  text-align: center;
  margin-bottom: 30px;
}
section {
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 5px;
  padding: 15px 20px;
  margin-bottom: 30px;
}
section h2 {
  margin-top: 0;
  color: #444;
}
label {
  font-weight: bold;
}
input, textarea, button {
  display: block;
  margin: 8px 0 15px;
  padding: 8px;
  width: 100%;
  max-width: 400px;
  border: 1px solid #ccc;
  border-radius: 3px;
  font-size: 1rem;
}
button {
  cursor: pointer;
  background: #0077cc;
  color: #fff;
  border: none;
}
button:hover {
  background: #005fa3;
}
.result {
  background: #eaeaea;
  padding: 10px;
  border-radius: 3px;
  margin-top: 10px;
}
table {
  border-collapse: collapse;
  width: 100%;
  max-width: 500px;
  margin-top: 10px;
}
table, th, td {
  border: 1px solid #999;
}
th, td {
  padding: 8px;
  text-align: left;
}