gilbertoquinteroA/LoginBootstrap.html

## LoginBootstrap.html
<!doctype html>
<html lang="en">
  <head>
      <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
    <title>Login</title>
      <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.2/css/bootstrap.min.css">
    <link rel="stylesheet" type="text/css" href="css/style.css">
  </head>
  <body>
<!--login-->
<div class="registration-form">
    <form>
        <h3 class="text-center">Create your account</h3>
        <div class="form-group">
            <input class="form-control item" type="text" name="username" maxlength="15" minlength="4" pattern="^[a-zA-Z0-9_.-]*$" id="username" placeholder="Username" required>
        </div>
        <div class="form-group">
            <input class="form-control item" type="password" name="password" minlength="6" id="password" placeholder="Password" required>
        </div>
        <div class="form-group">
            <input class="form-control item" type="email" name="email" id="email" placeholder="Email" required>
        </div>
        <div class="form-group">
            <button class="btn btn-primary btn-block create-account" type="submit">Create Account</button>
        </div>
    </form>
</div>
<!-- end of the login-->


    <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js" ></script>
    <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.2/js/bootstrap.min.js" ></script>
  </body>
</html>

## style.css
html {
  background-color:#214c84;
  background-blend-mode:overlay;
  display:flex;
  align-items:center;
  justify-content:center;
  background-image:url(https://images.latintimes.com/sites/latintimes.com/files/styles/large/public/2016/09/25/apple-store-rio.jpg);
  background-repeat:no-repeat;
  background-size:cover;
  height:100%;
}

body {
  background-color:transparent;
}

.registration-form {
  padding:50px 0;
}

.registration-form form {
  max-width:800px;
  padding:50px 70px;
  border-radius:10px;
  box-shadow:4px 4px 15px rgba(0, 0, 0, 0.2);
  background-color:#fff;
}

.registration-form form h3 {
  font-weight:bold;
  margin-bottom:30px;
}

.registration-form .item {
  border-radius:10px;
  margin-bottom:25px;
  padding:10px 20px;
}

.registration-form .item:hover{

  border:1px solid #0C98F5;
}

.registration-form .create-account {
  border-radius:30px;
  padding:10px 20px;
  font-size:18px;
  font-weight:bold;
  background-color:#5DADE2;
  border:none;
  color:white;
  margin-top:20px;
}

.registration-form .create-account:hover{

  background-color:red;

}

@media (max-width: 576px) {
  .registration-form form {
    padding:50px 20px;
  }
}
	<!doctype html>
	<html lang="en">
	<head>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
	<title>Login</title>
	<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.2/css/bootstrap.min.css">
	<link rel="stylesheet" type="text/css" href="css/style.css">
	</head>
	<body>
	<!--login-->
	<div class="registration-form">
	<form>
	<h3 class="text-center">Create your account</h3>
	<div class="form-group">
	<input class="form-control item" type="text" name="username" maxlength="15" minlength="4" pattern="^[a-zA-Z0-9_.-]*$" id="username" placeholder="Username" required>
	</div>
	<div class="form-group">
	<input class="form-control item" type="password" name="password" minlength="6" id="password" placeholder="Password" required>
	</div>
	<div class="form-group">
	<input class="form-control item" type="email" name="email" id="email" placeholder="Email" required>
	</div>
	<div class="form-group">
	<button class="btn btn-primary btn-block create-account" type="submit">Create Account</button>
	</div>
	</form>
	</div>
	<!-- end of the login-->



	<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js"></script>
	<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js" ></script>
	<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.2/js/bootstrap.min.js" ></script>
	</body>
	</html>
	html {
	background-color:#214c84;
	background-blend-mode:overlay;
	display:flex;
	align-items:center;
	justify-content:center;
	background-image:url(https://images.latintimes.com/sites/latintimes.com/files/styles/large/public/2016/09/25/apple-store-rio.jpg);
	background-repeat:no-repeat;
	background-size:cover;
	height:100%;
	}

	body {
	background-color:transparent;
	}

	.registration-form {
	padding:50px 0;
	}

	.registration-form form {
	max-width:800px;
	padding:50px 70px;
	border-radius:10px;
	box-shadow:4px 4px 15px rgba(0, 0, 0, 0.2);
	background-color:#fff;
	}

	.registration-form form h3 {
	font-weight:bold;
	margin-bottom:30px;
	}

	.registration-form .item {
	border-radius:10px;
	margin-bottom:25px;
	padding:10px 20px;
	}

	.registration-form .item:hover{

	border:1px solid #0C98F5;
	}

	.registration-form .create-account {
	border-radius:30px;
	padding:10px 20px;
	font-size:18px;
	font-weight:bold;
	background-color:#5DADE2;
	border:none;
	color:white;
	margin-top:20px;
	}

	.registration-form .create-account:hover{

	background-color:red;

	}

	@media (max-width: 576px) {
	.registration-form form {
	padding:50px 20px;
	}
	}