.headerImgSolus2 {
    display: inline-block;
    width: 295px;
    height: 105px;

    background-image: url("https://solus.psy.unibe.ch/assets/SOLUS_Logo.png");
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;

    background-color: transparent;
    border: none;

    /* hide text */
    text-indent: -9999px;
    overflow: hidden;
}

/* hover / focus / active stay transparent */
.headerImgSolus:hover,
.headerImgSolus:focus,
.headerImgSolus:active {
    background-color: transparent !important;
    text-decoration: none;
}