div.support-btn {
    cursor: pointer;
    width: 136px;
    height: 46px;
    line-height: 20px;
    background-color: #677386;
    font-family: system-ui;
    position: fixed;
    bottom: 10px;
    right: 10px;
    color: white;
    text-align: center;
    font-size: 1rem;
    font-weight: 700;
    border-radius: 25px;
    justify-content: center;
    align-items: center;
    gap: 4px;
    opacity: 1;
    transition: opacity 1s;
    display: flex;
}

div.support-btn.hidden {
    opacity: 0;
    visibility: hidden;
}

div.support-btn:hover {
    background-color: lightgray;
}

div.support-btn.hidden {
    opacity: 0;
    visibility: hidden;
}

div.support-btn > div.questionmark {
    border-radius: 50%;
    border: 2px solid white;
    width: 24px;
    height: 24px;
    box-sizing: border-box;
}