body {
  font-family: 'Segoe UI', 'Microsoft YaHei', Arial, sans-serif;
  background: #f7f7f7;
  margin: 0;
  padding: 0;
  text-align: center;
}

h1 {
  margin-top: 30px;
  color: #333;
}

#exchange-rates {
  margin: 30px auto;
  width: 90%;
  max-width: 500px;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
  padding: 20px;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 auto;
}

th, td {
  padding: 10px 0;
  border-bottom: 1px solid #eee;
}

th {
  background: #f0f0f0;
  color: #555;
}

tr:last-child td {
  border-bottom: none;
}

footer {
  margin: 40px 0 20px 0;
  color: #888;
  font-size: 14px;
}