#scrollTopBtn {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: white;        /* Weißer Hintergrund */
    border: 2px solid gray;         /* Grauer Rand */
    border-radius: 50%;             /* Rund */
    width: 50px;
    height: 50px;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 0;
    transition: background-color 0.3s;
}

#scrollTopBtn:hover {
    background-color: #f0f0f2;      /* Blau bei Hover */
}

#scrollTopBtn.show {
    display: flex;                  /* Sichtbar machen */
}

#scrollTopBtn svg {
    width: 24px;
    height: 24px;
    display: block;
}