/* Reset CSS */
* {
    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-color: #333;
    color: #fff;
    padding: 1rem 0;
    text-align: center;
}

nav ul {
    list-style: none;
    padding: 0;
}

nav ul li {
    display: inline;
    margin: 0 1rem;
}

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

main {
    display: flex;
    flex-wrap: wrap;
}

.left-widget {
    flex: 1;
    padding: 1rem;
    background-color: #e2e2e2;
    margin: 1rem;
    max-width: 250px;
}

.left-widget h2 {
    color: #333;
}

.left-widget ul {
    list-style: none;
    padding: 0;
}

.left-widget ul li {
    margin: 0.5rem 0;
}

.left-widget ul li a {
    text-decoration: none;
    color: #333;
}

.content {
    flex: 3;
    padding: 1rem;
    background-color: #fff;
    margin: 1rem;
}

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

@media (max-width: 768px) {
    nav ul li {
        display: block;
        margin: 0.5rem 0;
    }

    main {
        flex-direction: column;
    }

    .left-widget {
        max-width: 100%;
    }
}