.btn.disabled, [disabled].btn, fieldset[disabled] .btn {
    cursor: not-allowed;
    filter: alpha(opacity=65);
    -webkit-box-shadow: none;
    box-shadow: none;
    opacity: 0.65;
}

.m-btn.red.disabled, [disabled].m-btn.red, .m-btn.blue.disabled, [disabled].m-btn.blue, .m-btn.purple.disabled, [disabled].m-btn.purple, .m-btn.green.disabled, [disabled].m-btn.green {
    opacity: 0.7;
    cursor: not-allowed;
}