index.css

* {
    margin: 0px;
    padding: 0px;
    box-sizing: border-box;
}

.Heading_Image {
    background-image: url('img/meetings.jpg');
    height: 20rem;
    opacity: 0.9;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    position: relative;
    background-clip: border-box;
}

.Heading_Text {
    text-align: center;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: rgb(73, 65, 65);
}

.Heading_Text button {
    background-color: yellowgreen;
}

.Introduction {
    margin: 4rem 0rem;
    text-align: center;
}

.Introduction>p {
    font-size: 1.1rem;
    line-height: 2.4;
}

.section>p {
    text-align: center;
}

.logo {
    border: 1px solid #5128d8;
    background-color: rgb(99, 99, 241);
    color: white;
    padding: 10px;
    width: 80px;
    height: 80px;
    display: inline-block;
    margin: 20px;
    padding: 0px;
    border-radius: 50%;
    -moz-border-radius: 50%;
    -webkit-border-radius: 50%;
    text-align: center;
    font-size: 3rem;
    position: relative;
    left: 42%;
    top: 20%;
    transform: translate(-50%, -50%);
}

.card {
    position: relative;
    left: 48%;
    top: 30%;
    transform: translate(-50%, -50%);
    margin: 3rem 0rem;
}

.darken {
    font-size: 0.9rem;
    color: rgb(160, 153, 153);
}

.footer {
    background-color: blue;
    padding: 20px;
}

@media (max-width:800px) {
    .logo {
        top: 40px;
    }
}