Seems the code was overwritten, so please use:
input.wpcf7-form-control.wpcf7-text {
width: 100%;
margin-bottom: 10px;
}
input.wpcf7-form-control.wpcf7-submit {
margin-top: 10px;
}
.ibox-block .ibox-content h3 {
margin-bottom: 20px;
}
Regards