.center {
    margin: auto;
    width: 50%;
    border: 3px solid green;
    padding: 10px;
}


.clearfix::after {
    content: "";
    clear: both;
    display: table;
}


.center p {
    line-height: 1.5;
    display: inline-block;
    vertical-align: middle;
}

.container1 {
    width: 500px;
    height: 250px;
    margin: 50px;
    outline: solid 1px black;
    display: flex;
    justify-content: center;
    align-items: center;
}

.content2 {
    width: 600px;
    height: 300px;
    background-color: lightgrey;
    position: absolute; /*Can also be `fixed`*/
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    margin: auto;
    /*Solves a problem in which the content is being cut when the div is smaller than its' wrapper:*/
    max-width: 100%;
    max-height: 100%;
    overflow: auto;
    z-index: 1000;
    border-radius: 25px;
    padding: 20px;
    font-size: medium;
}

.content3 {
    width: 800px;
    height: 600px;
    background-color: lightgrey;
    position: absolute; /*Can also be `fixed`*/
    left: 0;
    right: 0;
    top: -120px;
    margin: auto;
    overflow: auto;
    z-index: 1000;
    border-radius: 25px;
    padding: 20px;
    font-size: medium;
}
.logo {
    margin: -8rem 0 0 0;
    text-align: center;
}

a:link {
    color: blue;
}