html, body{
    background-color: white;
    height: 100%;
    width: 100%;
    margin: 0;
    box-sizing: border-box;
}

#logo{
    position: relative;
    height: 100%;
    text-align: center;
    white-space: nowrap;
    vertical-align: middle;
    overflow: hidden;
   
}

.helper {
    display: inline-block;
    height: 100%;
    vertical-align: middle;
}

img{
    max-width: 80%;
    max-height: 80%;
    object-fit: scale-down;
}