.logo {
    font-size: xx-large;
    margin-top: 0;
    margin-left: 1rem;
    margin-right: 1rem;
    margin-bottom: 0;
    text-align: center;
    background-color: #7F7F7F;
    border-radius: 20px;
    /*border: solid blue 1px;*/
}
.logo img {
    width: 80%;                   /* Portrait, Handy */
/*    border: solid red 2px;*/
}

@media (aspect-ratio > 0.8) {   /* Landscape PC */

.logo img {
    width: 15%;                   /* Portrait, Handy */
    /*border: solid green 2px;*/
}
}