body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #f9f9f9;
    color: #333;
}

header#main-header {
    background-color: #800000;
    color: #fff;
    padding: 20px 0;
    text-align: center;
}

header#main-header img {
    display: block;
    margin: 10px auto;
    max-width: 90%;
    height: auto;
}


nav ul {
    list-style: none;
    padding: 0;
    margin: 10px 0 0 0;
    display: flex;
    justify-content: center;
    gap: 20px;
}

nav ul li a {
    color: #fff;
    text-decoration: none;
    font-weight: bold;
    padding: 5px 10px;
    transition: background-color 0.3s ease;
}

nav ul li a:hover {
    background-color: #b22222;
    border-radius: 5px;
}

.assignment-link {
    color: black;   
    text-decoration: none;
}

main {
    max-width: 1000px;
    margin: 20px auto;
    padding: 0 20px;
}

section {
    background-color: #fff;
    padding: 20px;
    margin-bottom: 20px;
    border-radius: 8px;
    box-shadow: 0px 2px 5px rgba(0,0,0,0.1);
}

section h2 {
    color: #800000;
    margin-top: 0;
}

article h3 {
    color: #333;
    margin-bottom: 10px;
}

aside {
    background-color: #f0f0f0;
    padding: 15px;
    margin-top: 10px;
    border-left: 4px solid #800000;
}

a {
    color: #800000;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

footer {
    text-align: center;
    padding: 15px 0;
    background-color: #333;
    color: #fff;
}

section p {
    margin: 10px 0;
}

@media (max-width: 600px) {
    nav ul {
        flex-direction: column;
        gap: 10px;
    }

    header#main-header img {
        width: 100%;
        height: auto;
    }
}