fakeCAPTCHA.css

.captcha {
    position: relative;
    width: 280px;
    margin: 16px;
    padding: 24px;
    outline: 0.666667px solid rgb(211, 211, 211);
    box-shadow: 0px 0px 4px 1px rgba(0, 0, 0, 0.08);
    background: rgb(249, 249, 249);
    border-radius: 3px;
    transition: background 0.25s;
    color: #000;
}

.captcha-clickable {
    cursor: pointer;
    -webkit-tap-highlight-color: rgba(255, 255, 255, 0);
    -webkit-user-select: none;
    -moz-user-focus: none;
    -moz-user-select: none;
    user-select: none;
}

.captcha-checkbox {
    background: #fff;
    width: 24px;
    height: 24px;
    outline: 2px solid rgb(193, 193, 193);
    border-radius: 2px;
    display: inline-block;
    vertical-align: middle;
    transition-property: border-radius, transform;
    transition-duration: 0.5s;
}

.captcha-clickable:hover .captcha-checkbox {
    outline: 2px solid rgb(178, 178, 178);
    box-shadow: rgba(0, 0, 0, 0.1) 0px 1px 1px 0px inset;
}

.captcha-clickable:active .captcha-checkbox {
    background: rgb(235, 235, 235);
}

.captcha-text {
    display: inline-block;
    vertical-align: middle;
    margin-left: 16px;
    font-size: 15px;
    transition: 0.125s;
    font-family: sans-serif !important;
    transform: translateY(-1px);
    width: calc(100% - 64px);
}

.captcha-icon {
    position: absolute;
    left: 24px;
    top: 24px;
    transition: 0.3s;
}

.captcha-icon:not(.captcha-spinner) {
    transform: scale(1.5, 0);
}

.captcha-spinner {
    opacity: 0;
    transition: 0.3s;
    animation-name: spin;
    animation-timing-function: linear;
    animation-iteration-count: infinite;
    animation-duration: 1s;
}

@keyframes spin {
    from {
        transform: rotate(0) scale(1.25);
    }

    to {
        transform: rotate(360deg) scale(1.25);
    }
}

.captcha-mark {
    color: #000 !important;
    -webkit-tap-highlight-color: rgba(255, 255, 255, 0);
    -webkit-user-select: none;
    -moz-user-focus: none;
    -moz-user-select: none;
    user-select: none;
}

.captcha-mark-text {
    position: absolute;
    right: 8px;
    bottom: 4px;
    font-size: 12px;
    opacity: 0.5;
    font-family: sans-serif !important;
    transition: 0.25s;
    text-decoration: none;
}

.captcha-mark:hover .captcha-mark-text {
    text-decoration: underline;
}

.captcha-mark-logo {
    position: absolute;
    right: 8px;
    bottom: 24px;
    width: 32px;
    height: 32px;
}

.captcha-dark {
    outline: 0.666667px solid rgb(92, 92, 92);
    box-shadow: 0px 0px 4px 1px rgba(255, 255, 255, 0.08);
    background: rgb(54, 54, 54);
    color: #fff;
}

.captcha-dark .captcha-checkbox {
    background: rgb(48, 48, 48);
    outline: 2px solid rgb(110, 110, 110);
}

.captcha-dark .captcha-clickable:hover .captcha-checkbox {
    outline: 2px solid rgb(125, 125, 125);
    box-shadow: rgba(255, 255, 255, 0.1) 0px 1px 1px 0px inset;
}

.captcha-dark .captcha-clickable:active .captcha-checkbox {
    background: rgb(68, 68, 68);
}

.captcha-dark .captcha-mark {
    color: #fff !important;
}