body {
    font-family: Arial, sans-serif;
    background-color: #f4f6f8;
    margin: 0;
}

header {
    background-color: #2c7be5;
    color: white;
    padding: 20px;
    text-align: center;
}

nav {
    background-color: #1a5fd0;
    padding: 10px;
    text-align: center;
}

nav a {
    color: white;
    text-decoration: none;
    margin: 0 15px;
    font-weight: bold;
}

nav a:hover {
    text-decoration: underline;
}

main {
    padding: 30px;
    max-width: 800px;
    margin: auto;
    background: white;
}

footer {
    background-color: #2c7be5;
    color: white;
    text-align: center;
    padding: 15px;
    margin-top: 20px;
}

.btn {
    display: inline-block;
    background-color: #28a745;
    color: white;
    padding: 10px 16px;
    border-radius: 5px;
    text-decoration: none;
}

.btn:hover {
    background-color: #218838;
}