body {
  font-family: Arial, sans-serif;
  background: #f5f7fa;
  padding: 20px;
  text-align: center;
}
h1 {
  color: #333;
}
table {
  margin: auto;
  border-collapse: collapse;
  width: 80%;
  background: #fff;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}
th, td {
  padding: 12px;
  border: 1px solid #ddd;
}
th {
  background: #333;
  color: white;
}
tr:nth-child(even) {
  background-color: #f2f2f2;
}