body {
  background: #f9f9f9;
  color: #222;
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
}

header, footer {
  background: #333;
  color: #fff;
  padding: 1em;
  text-align: center;
}

main {
  max-width: 800px;
  margin: 2em auto;
  background: #fff;
  padding: 2em;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

a {
  color: #0074d9;
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

button, input[type="submit"] {
  background: #0074d9;
  color: #fff;
  border: none;
  padding: 0.5em 1.2em;
  border-radius: 4px;
  cursor: pointer;
}
button:hover, input[type="submit"]:hover {
  background: #005fa3;
}