.math-captcha-form {
    display: block;
    float: none;
    clear: both;
}

.login form .math-captcha-form span {
    display: inline-block;
    margin-bottom: 16px;
}

input[type="text"].mc-input {
    display: inline-block;
    width: 60px !important;
    vertical-align: middle;
    margin-bottom: 0;
}