Bootstrap snippet and html example. Login form

<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" crossorigin="anonymous">

<div class="container">
  <div class="row">
    <div class="col-md-4"></div>
    <div class="col-md-5">
      <div class="card cardbox">
        <div class="card-header">Login</div>
        <div class="card-body">

          <!-- socail media group -->
          <div class="social-buttons">
            <a href="#" class="btn btn-md btn-block btn-fb"><i class="fa fa-facebook"></i> Facebook</a>
            <a href="#" class="btn btn-md btn-block btn-tw"><i class="fa fa-twitter"></i> Twitter</a>
          </div>

          <div class="login-or">
            <hr class="hr-or">
            <span class="span-or">or</span>
          </div>

          <div class="form-group">

            <form id="login-nav" method="post" role="form" class="form" accept-charset="UTF-8">

              <div class="form-group">
                <label class="sr-only">Username</label>
                <input type="text" id="reg_username" name="user_name" class="form-control"
                       value="" placeholder="Username" required>
              </div>

              <!-- password group -->
              <div class="form-group">

                <!-- password label -->
                <label class="sr-only">Password</label>
                <!-- password input -->
                <div class="input-group">
                  <input type="password" id="reg_userpassword" name="user_password" class="form-control" data-placement="bottom" data-toggle="popover" data-container="body"
                         data-html="true" value="" placeholder="Password" required>

                  <div class="input-group-append">
                    <button class="btn btn-outline-secondary" type="button" id="button-append1" onclick="togglePassword()">
                      <i class="fa fa-eye" aria-hidden="true"></i>
                    </button>
                  </div>
                </div>
                <!-- password remember & results -->
                <div class="help-block text-right">
                  <small><a href="#">Forgot Password</a></small>
                </div>       
    

              </div>


              <!-- Submit -->
              <div class="form-group">
                <button id="reg_submit" name="submit"  value="1" class="btn btn-block btn-primary">Login</button>
              </div>

              <!-- Remember -->
              <div class="form-check">
                <input type="checkbox" id="reg_remember" name="user_remember" class="form-check-input" value="1">
                <label class="form-check-label">Remember me</label>
              </div>

            </form>
          </div>

          <div class="login-or"><hr class="hr-or"></div>
          <!-- Links -->
          <div class="bottom text-center">
            Aren't you user? <a href="#"><b>Register</b></a>
          </div>
        </div>
      </div>
    </div>
  </div>
</div>

.row{
  margin-top: 50px;
  margin-bottom: 50px;
}

.masthead-text{
  height: 300px;
}

.form-control{
  height: 45px;
}

.login-or {
    position: relative;
    font-size: 18px;
    color: #aaa;
    margin-top: 20px;
    margin-bottom: 20px;
    padding-top: 10px;
    padding-bottom: 10px;
  }
  .span-or {
    display: block;
    position: absolute;
    left: 50%;
    top: -2px;
    margin-left: -25px;
    background-color: #fff;
    width: 50px;
    text-align: center;
  }
  .hr-or {
    background-color: #cdcdcd;
    height: 1px;
    margin-top: 0px !important;
    margin-bottom: 0px !important;
  }

#login-dp{
    min-width: 250px;
    padding: 14px 14px 0;
    overflow:hidden;
    background-color:rgba(255,255,255,.8);
}
#login-dp .help-block{
    font-size:12px    
}

#login-dp .social-buttons{
    margin:12px 0    
}
#login-dp .social-buttons a{
    width: 49%;
}
#login-dp .form-group {
    margin-bottom: 10px;
}
.btn-fb{
    color: #fff;
    background-color:#3b5998;
}
.btn-fb:hover{
    color: #fff;
    background-color:#496ebc 
}
.btn-tw{
    color: #fff;
    background-color:#55acee;
}
.btn-tw:hover{
    color: #fff;
    background-color:#59b5fa;
}
@media(max-width:768px){
    #login-dp{
        background-color: inherit;
        color: #fff;
    }
    #login-dp .bottom{
        background-color: inherit;
        border-top:0 none;
    }
}

// Şifre gizle göster
function togglePassword() {

  var element = document.getElementById('reg_userpassword');
  element.type = (element.type == 'password' ? 'text' : 'password');

};