#refresh-captcha {
        background-color: white;
        color: blue;
        border: 1px solid blue;
        font-size: 24px;
        padding: 10px;
        text-align: center;
        cursor: pointer;
    }

    #refresh-captcha:hover {
        background-color: #f0f0f0;
    }
    .btn-bill {
        width: 100%; height: 100%; padding-top: 8px; border: none; background-color: transparent; position: relative;
    }
    .btn-bill-image {
        object-fit: fill; width: 100%; height: 100%; position: relative; display: block;
    }
    .btn-bill-image-check {
        object-fit: fill; width: 100%; height: 100%; position: relative; display: none;
    }