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

header {
    background-color: #4CAF50;
    color: white;
    text-align: center;
    padding: 1em 0;
}

.top-menu ul {
    display: flex;
    justify-content: center;
    list-style: none;
    padding: 0;
    margin: 0;
    background-color: #333;
}

.top-menu ul li {
    margin: 0 10px;
}

.top-menu ul li a {
    color: white;
    text-decoration: none;
    padding: 10px 15px;
}

.services {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    padding: 20px;
}

.service-card {
    border: 1px solid #ccc;
    border-radius: 5px;
    padding: 15px;
    text-align: center;
    width: 200px;
    box-shadow: 2px 2px 5px rgba(0, 0, 0, 0.1);
}

.service-card .btn {
    display: inline-block;
    padding: 10px 15px;
    color: white;
    background-color: #4CAF50;
    text-decoration: none;
    border-radius: 3px;
}

.ad-space {
    margin-top: 20px;
    padding: 20px;
    background: #f9f9f9;
    border-top: 1px solid #ddd;
}

footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 10px 0;
}