.captcha-letter {
    display: inline-block;
    font-size: 24px;
    font-weight: bold;
    /* background-color: #f0f0f0; */
    /* padding: 5px; */
    /* border: 1px solid #ccc; */
    /* margin: 2px; */
    transform: rotate(calc(-10deg + 20deg * var(--rotation)));
    color: #ffffff;
    position: relative;
    top: calc(-5px + 10px * var(--top-offset));
    left: calc(-5px + 10px * var(--left-offset));
    filter: blur(1px) contrast(150%);
}

#captchaContainer {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    background-color: #001029;
    padding: 10px;
    width: 30%;
}

#txtInput {
    margin-top: 4px;
    padding: 5px;
    border: 2px dotted #001029;
    width: 30%;
}