body {
  font-family: Arial, Helvetica, sans-serif;
  margin: 0;
  padding: 0;
  background-color: #f0f2f5;
  color: #333;
}

header {
  background-color: #007bff;
  padding: 20px;
  text-align: center;
  color: white;
}

header h1 {
  margin-top: 0;
}

nav ul {
  list-style: none;
  display: flex;
  justify-content: center;
  gap: 20px;
  margin: 0;
  padding: 0;
}

nav a {
  color: white;
  text-decoration: none;
  font-weight: bold;
  padding: 5px 10px;
  transition: background-color 0.3s;
}

nav a:hover {
  background-color: #0056b3;
  border-radius: 5px;
}

main {
  display: flex;
  max-width: 1200px;
  margin: 20px auto;
  padding: 0 20px;
  gap: 30px;
}

section,
aside {
  background-color: #ffffff;
  padding: 20px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  border-radius: 8px;
}

section {
  flex: 3;
}

aside {
  flex: 1;
}

label,
input {
  display: block;
}

input[type="text"],
input[type="email"],
input[type="password"] {
  width: 100%;
  padding: 8px;
  box-sizing: border-box;
  margin-bottom: 15px;
}

button[type="submit"] {
  width: 100%;
  padding: 10px;
  background-color: #007bff;
  color: white;
  border: none;
  cursor: pointer;
  border-radius: 5px;
  margin-top: 10px;
}

button[type="submit"]:hover {
  background-color: #0056b3;
}

footer {
  background-color: #333;
  color: #fff;
  text-align: center;
  padding: 20px;
  margin-top: 20px;
}