body {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-top: 5px;
    min-height: 100vh;
}

.Main-Text:hover + .Extra-Text {
    display: block;
}

.Extra-Text {
    background-color: whitesmoke;
    margin-top: 10px;
    width: 300px;
    height: 30px;
    border: 1px solid #000000;
    padding: 10px;
    font-size: 10px;
    display: none;
}