body {
    background-color: #f5f5f5;
    font-family: Arial, sans-serif;
}

.header {
    background-color: #2c3e50;
    color: #ffffff;
    padding: 10px 20px;
}

.navbar {
    background-color: #ecf0f1;
    padding: 10px 20px;
    border-bottom: 1px solid #dcdcdc;
}

.navbar a {
    color: #2c3e50;
    padding: 10px 15px;
    text-decoration: none;
}

.navbar a:hover {
    background-color: #dcdcdc;
}

.content {
    background-color: #ffffff;
    padding: 20px;
    margin: 20px auto;
    max-width: 1200px;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.content h1 {
    color: #2c3e50;
}

.content p {
    color: #555555;
}

.button {
    background-color: #3498db;
    color: #ffffff;
    padding: 10px 15px;
    border: none;
    border-radius: 3px;
    text-decoration: none;
    display: inline-block;
}

.button:hover {
    background-color: #2980b9;
}

.button-free {
    background-color: #2ecc71;
}

.button-free:hover {
    background-color: #27ae60;
}