body {
    background-color:darkgrey;
    margin-left: 20px;
}

.input {
    width: 80px;
    height: 20px;
    margin-left: 70px;

}

button {
    height: 25px;
    font-size: 10px;
    font-weight: bold;
    color: darkslategrey;
}

#convert {
    align-items: center;
}

h4 {
    text-align: center;
}