Форма для сайта на Bootstrap — стиль 5

Подробное описание и демонстрация работы блока «Формы» для сайта под номером №5 для библиотеки Bootstrap. Html и CSS код для реализации блока forms на сайте как на изображении.

<div class="form-bg">
    <div class="container">
        <div class="row">
            <div class="col-md-offset-3 col-md-6">
                <form class="form-horizontal">
                    <div class="form-group">
                        <label class="col-md-3 col-sm-2 control-label" for="exampleInputFirstName2">First Name</label>
                        <div class="col-md-9 col-sm-10">
                            <input type="text" class="form-control" id="exampleInputFirstName2" placeholder="Eg.Steve">
                        </div>
                    </div>
                    <div class="form-group">
                        <label class="col-md-3 col-sm-2 control-label" for="exampleInputLastName2">Last Name</label>
                        <div class="col-md-9 col-sm-10">
                            <input type="text" class="form-control" id="exampleInputLastName2" placeholder="Eg.Thomas">
                        </div>
                    </div>
                    <div class="form-group">
                        <label class="col-md-3 col-sm-2 control-label">Gender</label>
                        <div class="col-md-9 col-sm-10">
                            <input class="check" type="radio" id="check1" name="radio">
                            <label for="check1">Male</label>
                            <input class="check" type="radio" id="check2" name="radio">
                            <label for="check2">Female</label>
                        </div>
                    </div>
                    <div class="form-group">
                        <label class="col-md-3 col-sm-2 control-label" for="exampleInputName2">Date of Birth</label>
                        <div class="col-md-3 col-sm-3">
                            <input type="text" class="form-control" id="exampleInputName2" placeholder="DD">
                        </div>
                        <div class="col-md-3 col-sm-3">
                            <input type="text" class="form-control" id="exampleInputName2" placeholder="MM">
                        </div>
                        <div class="col-md-3 col-sm-3">
                            <input type="text" class="form-control" id="exampleInputName2" placeholder="YYYY">
                        </div>
                    </div>
                    <div class="form-group">
                        <label class="col-md-3 col-sm-2 control-label">Languages</label>
                        <div class="col-md-9 col-sm-10">
                            <select class="form-control">
                                <option>English(US)</option>
                                <option>English(Uk)</option>
                            </select>
                        </div>
                    </div>
                    <div class="form-group">
                        <div class="col-md-offset-3 col-sm-offset-2 col-sm-3">
                            <button type="submit" class="btn btn-default">Submit</button>
                        </div>
                    </div>
                </form>
            </div>
        </div>
    </div>
</div>

.form-bg{
    background: linear-gradient(to right,#014d6f 10%,#2b8e8b);
    font-family: 'Roboto', sans-serif;
    color: #fff;
}
.form-horizontal .form-group{
    margin-bottom: 30px;
}
.form-horizontal .form-control{
    background: transparent;
    border: 1px solid rgba(255,255,255,0.5);
    height: 44px;
    line-height: 2;
    color: #fff;
    padding: 10px 15px;
}
.form-horizontal .form-control:focus{
    border-color: #fff;
    box-shadow:0 1px 3px rgba(255,255,255,0.5);
    outline: 0 none;
}
.form-horizontal .form-control::-moz-placeholder{
    color: #fff;
    opacity: 0.5;
}
.form-horizontal .check{
    display: none;
}
.form-horizontal .check + label{
    display: inline-block;
    background-color: rgba(255,255,255,0.4);
    border-radius: 5px;
    padding: 10px 0;
    color: #fff;
    width: 48.4%;
    text-align: center;
    font-size: 15px;
    margin-right: 10px;
}
.form-horizontal #check2 + label{
    margin-right: 0;
}
.form-horizontal .check:checked + label{
    background: #fff;
    color: #0062bd;
}
.form-horizontal select.form-control option{
    color: #000;
    background: #fff;
}
.form-horizontal .btn{
    color: #fff;
    background-color: rgba(255,255,255,0.4);
    border: none;
    padding: 10px 30px;
    font-weight: 600;
    transition: all 0.2s ease 0s;
}
.form-horizontal .btn:hover{
    color: #0062bd;
    background: #fff;
}
@media only screen and (max-width: 479px){
    .check + label{
        width: 48%;
    }
}