Bootstrap & remixicon basics

<!DOCTYPE html>
<html lang="en">
<head>
    <link href="https://cdn.jsdelivr.net/npm/[email protected]/fonts/remixicon.css"
    rel="stylesheet">
    <link href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css"
    rel="stylesheet"
    integrity="sha384-EVSTQN3/azprG1Anm3QDgpJLIm9Nao0Yz1ztcQTwFspd3yD65VohhpuuCOmLASjC"
    crossorigin="anonymous">

    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible"
    content="IE=edge">
    <meta name="viewport"
    content="width=device-width, initial-scale=1.0">
    <title>Register Form</title>

    <style>
        div {
          border: 1px solid black;
          background-color: lightblue;
          padding-top: 50px;
          padding-right: 30px;
          padding-bottom: 50px;
          padding-left: 80px;
        }
        </style>
</head>
<body>
    <div>
        <h1>Registration Form</h1>
        <form>
            Fullname
            <input name="fullname" type="text"
            class="form-control">
            Username
            <input name="username" type="text"  class="form-control">
            Password
            <input name="password" type="password"  class="form-control">
            <button type="submit"
            class="btn btn-success"
            ><i class="ri-save-2-fill"></i> Save info</button>
        </form>
    </div>
</body>
</html>