<div class="app-page" data-page="home">

        <div class="app-topbar">
            <div class="app-title">My Web App</div>
        </div>

        <div class="app-content">

            <br />
            <div class="app-button green">Sign In</div>
            <br />
            <!-- agregar data-target -->
            <div class="app-button blue" data-target="sign-up">Sign Up</div>

        </div>

   </div>

   <div class="app-page" data-page="sign-up">

        <div class="app-topbar">
            <div class="app-button left blue" data-target="home">back</div>
        </div>
        <br />

        <div class="app-content">

            <input id="btnEmail" class="app-input" placeholder="Email">
            <input id="btnPassword" class="app-input" placeholder="Password" type="password">
            <div id="btnSignUp" class="app-button green ">SignUp</div>

        </div>

    </div>