/* Basic Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f4f4f4;
}

header {
    background: #333;
    color: #fff;
    padding: 1rem 0;
}

header nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
}

header nav ul li {
    margin: 0 1rem;
}

header nav ul li a {
    color: #fff;
    text-decoration: none;
}

main {
    padding: 20px;
}

section {
    margin-bottom: 20px;
}

.service-item {
    background: #ddd;
    padding: 10px;
    margin-bottom: 10px;
}

aside {
    background: #333;
    color: #fff;
    padding: 20px;
}

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

@media (max-width: 768px) {
    header nav ul {
        flex-direction: column;
    }

    header nav ul li {
        margin-bottom: 1rem;
    }
}