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

.navbar {
    background-color: #333;
    overflow: hidden;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar .menu-icon {
    display: none;
    font-size: 30px;
    cursor: pointer;
    padding: 10px 20px;
    color: white;
}

.navbar .nav-links {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
}

.navbar .nav-links li {
    float: left;
}

.navbar .nav-links li a {
    display: block;
    color: white;
    text-align: center;
    padding: 14px 20px;
    text-decoration: none;
}

.navbar .nav-links li a:hover {
    background-color: #575757;
}

main {
    padding: 20px;
    text-align: center;
}

@media screen and (max-width: 600px) {
    .navbar .nav-links {
        display: none;
        flex-direction: column;
        width: 100%;
    }

    .navbar .menu-icon {
        display: block;
    }

    .navbar .nav-links li {
        float: none;
    }

    .navbar .nav-links li a {
        text-align: left;
        padding: 14px 20px;
    }

    .navbar .nav-links.show {
        display: flex;
    }
}