<div class="form-group">
    <label style="width:40%" class="text-shadow" for="username">Username</label>
    <input style="width:50%" required value="" type="text" name="username" id="username" class="form-control">
  </div>
  <div class="form-group">
    <label style="width:40%" class="text-shadow" for="password">Password</label>
    <input style="width:50%" required value="" type="text" name="password" id="password" class="form-control">
  </div>
  
  <button type="submit" class="btn btn-primary">Login</button>