header {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 1rem;
}

nav ul {
    list-style-type: none;
    padding: 0;
    display: flex;
    justify-content: center;
    background-color: #f4f4f4;
}

nav ul li {
    margin: 0 1rem;
}

nav ul li a {
    text-decoration: none;
    color: #333;
    padding: 0.5rem 1rem;
}

nav ul li a.active {
    background-color: #333;
    color: #fff;
}

.tab-content {
    display: none;
    padding: 2rem;
}

.tab-content.active {
    display: block;
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1rem;
}

.service-card {
    border: 1px solid #ddd;
    padding: 1rem;
    text-align: center;
}

.service-card img {
    max-width: 100px;
    height: auto;
}

.service-card button {
    background-color: #333;
    color: #fff;
    border: none;
    padding: 0.5rem 1rem;
    cursor: pointer;
}