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

header {
    background-color: #8b0000;
    color: #fff;
    padding: 1em 0;
    text-align: center;
    font-size: 20px;
}

header h1 {
    margin: 0;
}


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

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

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

main {
    padding: 2em;
}

footer {
    background-color: #8b0000;
    color: #fff;
    text-align: center;
    position: fixed;
    margin: auto;
    bottom: 0;
    width: 100%;
    font-size: 13px;
}


.professor{

}
        .about-introduction{
text-align: center;
font-size: 30px;
font-weight: bold;
margin: 0 0 40px;

        }
.about{
margin: 0;
display: flex;
}
.about-image{

}
.about-caption{
padding-left: 15px;
}
    .about-headline{
margin: 0 0 20px;
font-size: 20px;
    }
    .about-description{

    }