#sidebar #avatar {
    display: block;
    width: 112px;
    height: 112px;
    overflow: hidden;
    border: 2px solid rgba(255, 255, 255, 0.2);
    transition: border-color 0.35s ease-in-out;
}

#sidebar #avatar:hover {
    border-color: rgba(255, 255, 255, 0.8);
}

#sidebar #avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    background-color: transparent;
}