body {
  font-family: Arial, sans-serif;
  background: #f9f9f9;
  color: #333;
  margin: 0;
  padding: 0;
  line-height: 1.6;
}
header, nav, main, footer {
  max-width: 800px;
  margin: 0 auto;
  padding: 20px;
}
h1 {
  color: #2c3e50;
  text-align: center;
}
nav {
  text-align: center;
  margin-bottom: 20px;
}
nav a {
  text-decoration: none;
  color: #0077cc;
  margin: 0 10px;
  font-weight: bold;
}
nav a:hover {
  color: #005599;
}
p {
  font-size: 1.1em;
}
form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
button {
  background: #0077cc;
  color: #fff;
  border: none;
  padding: 10px;
  font-size: 1em;
  cursor: pointer;
  border-radius: 4px;
}
button:hover {
  background: #005599;
}