body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

header, main, footer {
  padding: 20px;
}

header {
  background: #2c3e50;
  color: #fff;
}

main {
  flex: 1;
}

footer {
  background: #f4f4f4;
  text-align: center;
  font-size: 0.9em;
  color: #555;
  border-top: 1px solid #ddd;
}

a {
  color: #0078d4;
  text-decoration: none;
}

  a:hover {
    text-decoration: underline;
  }