<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script> <script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script> <!------ Include the above in your HEAD tag ----------> <div class="container"> <div class="row d-flex justify-content-center"> <div class="col-md-8 bg-secondary"> <h2 class="text-center">Contact Us</h2> <h3>Get in touch</h3> <form> <div class="form-group"> <input type="text" class="form-control form-input" id="name" aria-describedby="nameHelp" placeholder="Enter Name"> <label for="name" class="form-label">Name</label> </div> <div class="form-group"> <label for="exampleInputEmail1">Email address</label> <input type="email" class="form-control" id="exampleInputEmail1" aria-describedby="emailHelp" placeholder="Enter email"> <small id="emailHelp" class="form-text text-muted">We'll never share your email with anyone else.</small> </div> <div class="form-group"> <label for="exampleInputPassword1">Password</label> <input type="password" class="form-control" id="exampleInputPassword1" placeholder="Password"> </div> <div class="form-group form-check"> <input type="checkbox" class="form-check-input" id="exampleCheck1"> <label class="form-check-label" for="exampleCheck1">Check me out</label> </div> <button type="submit" class="btn btn-primary">Submit</button> </form> </div> </div> </div>

.form-group:not(:last-child) { margin-bottom: 2rem; } .form-input { font-size: 1.5rem; font-family: inherit; color: inherit; padding: 1.5rem 2rem; border-radius: 2px; background-color: rgba(255, 255, 255, 0.5); border: none; border-bottom: 3px solid transparent; width: 90%; display: block; transition: all .3s; } .form-input:focus { outline: none; box-shadow: 0 1rem 2rem rgba(0, 0, 0, 0.1); border-bottom: 3px solid #c40c0c; } .form-input:focus:valid { border-bottom: 3px solid #311b92; } .form-input::-webkit-input-placeholder { color: orangered; } .form-label { font-size: 1.2rem; font-weight: 700; margin-left: 2rem; margin-top: .7rem; display: block; transition: all .3s; } .form-input:placeholder-shown + .form-label { opacity: 0; visibility: hidden; transform: translateY(-8rem); } .form-radio-group { width: 49%; display: inline-block; } .form-radio-input { display: none; } .form-radio-label { font-size: 1.6rem; cursor: pointer; position: relative; padding-left: 4.5rem; } .form-radio-button { height: 3rem; width: 3rem; border: 5px solid #311b92; border-radius: 50%; display: inline-block; position: absolute; left: 0; top: -.4rem; } .form-radio-button::after { content: ""; display: block; height: 1.3rem; width: 1.3rem; border-radius: 50%; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); background-color: darkred; opacity: 0; transition: all .3s; } .form-radio-input:checked ~ .form-radio-label .form-radio-button::after { opacity: 1; }