.captcha {
    float: left;
}
.captcha .label--checkbox {
    margin: 0;
    padding: 15px 16px 15px 12px;
    background: #eee;
    height: 48px;
    line-height: 18px;
    border: #bbb solid 1px;
}
.captcha .label--checkbox span {
    position: relative;
    line-height: 18px;
    font-size: 15px;
}
.captcha .label--checkbox span.label {
    font-size: 13px;
    margin-left: 30px;
    font-family: Arial;
    line-height: 18px;
    height: 18px;
    display: block;
}
.captcha .checkbox {
    position: relative;
    top: 0rem;
    margin: 0;
    cursor: pointer;
}
@-moz-document url-prefix() {
    .captcha .checkbox {
        top: 14px;
    }
}
.captcha .checkbox:before {
    -webkit-transition: all 0.3s ease-in-out;
    -moz-transition: all 0.3s ease-in-out;
    transition: all 0.3s ease-in-out;
    content: "";
    position: absolute;
    left: 0;
    top: -2px;
    z-index: 1;
    width: 20px;
    height: 20px;
    border: 2px solid #ddd;
}
.captcha .checkbox.checked:before {
    -webkit-transform: rotate(-45deg);
    -moz-transform: rotate(-45deg);
    -ms-transform: rotate(-45deg);
    -o-transform: rotate(-45deg);
    transform: rotate(-45deg);
    height: .5rem;
    top: 0px;
    border-color: green;
    border-top-style: none;
    border-right-style: none;
}
.captcha .checkbox:after {
    content: "";
    position: absolute;
    top: -0.125rem;
    left: 0;
    width: 18px;
    height: 18px;
    background: #fff;
    cursor: pointer;
}
.captcha .checkbox.checked:after {
    background: transparent;
}
.captcha.error-captcha .checkbox:before {
    border-color: red;
}