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HTML

              
                div(class="box-contain")
  div(id="blue-border")
    div(class="form-info")
      h3 thank you for watching! <br> you may also watch <br> my other pens.<br>see you next time.
  div(class="form-contain")
    div(class="title-contain")
      h2 Try the Form
      p sign up and see the magic
    div(class="input-contain")
      form(id="form")
        input(type="text" placeholder="Email" id="Email" pattern="[a-z]{1,15}" title="Username should only contain lowercase letters. e.g. john")
      input(placeholder="Password" id="password")
      p by signing up, i agree the Terms of Service and Privacy Policy.
    div(class="confirm-btn")
      button
        | create my account
    div(class="blog-container")
      div(class="blockarea")
        | or
      a(href="http://lichin.me")
        button
          | visit my study blog

              
            
!

CSS

              
                @import url(https://fonts.googleapis.com/css?family=Lato:400,100,300,700,100italic,300italic,400italic,700italic,900,900italic);
*
  margin 0
  padding 0
  -webkit-touch-callout none /* iOS Safari */
  -webkit-user-select none  /* Chrome/Safari/Opera */
  -moz-user-select none      /* Firefox */
  -ms-user-select none      /* IE/Edge */
  user-select none
input
  -webkit-user-select auto
  user-select auto
span
  color black
h2,p
  color #F1FAFB
  font-weight 700
::-webkit-input-placeholder/* WebKit, Blink, Edge */
  color #F1FAFB
  font-weight 400
  font-size 1.4em
:-moz-placeholder /* Mozilla Firefox 4 to 18 */
  color #F1FAFB
  font-weight 400
::-moz-placeholder/* Mozilla Firefox 19+ */
  color #F1FAFB
  font-weight 400
  
body
  background #FFEF9C
  display flex
  flex-direction column
  -webkit-justify-content center
  justify-content center
  align-items center
  font-family "Lato"
  padding 0
  margin 0
  .box-contain
    position relative
    margin 50px 0
    width 560px
    height 400px
    background #0EA8EC
    #blue-border
      position absolute
      border 5px solid #0E39FE
      top -13px
      left -13px
      width calc(100% - 17px)
      height calc(100% - 17px)
      background transparent
      transition all .5s ease
      pointer-events none
      .form-info
        transition all .5s ease
        padding 50px
        opacity 0
        visibility hidden
        &.info-disappear
          opacity 1
          visibility visible
          transition all .5s ease
        h3
          font-size 3em
          letter-spacing 1px
          color #F1FAFB
          display none
    .form-contain
      position relative
      margin 30px auto
      width 70%
      height 100%
      text-align center
      transition all .5s ease
      opacity 1
      visibility visible
      &.form-disappear
        opacity 0
        visibility hidden
      .title-contain
        h2
          font-size 2em
          letter-spacing 1.5px
        p
          font-size 1em
          font-weight 300
      .input-contain
        margin-top 50px
        input[type="text"],input[type="password"],#password 
          margin 0 auto
          display block
          width 340px
          height 40px
          font-size 1em
          font-weight 700
          padding 5px 10px
          line-height 35px
          letter-spacing 1px
          margin-bottom 15px
          border 3px solid #F1FAFB
          border-radius 0px
          color #0E39FE
          background transparent
          outline none
          z-index 1
          transition border-color .35s ease,color .35s ease
          &:invalid
            border-color #ff4d4d
        #password
          letter-spacing 1px
          font-size 16px
          &.square
            letter-spacing: 0.01em
            -webkit-text-security square !important
            -moz-text-security square !imporant
            -o-text-security square !imporant
            text-security square !important
          &.circle
            -webkit-text-size-adjust 2
            letter-spacing 0.2em
            font-size 20px
            -webkit-text-security circle !important
            -moz-text-security circle !imporant
            -o-text-security circle !imporant
            text-security circle !important
          &.disc
            letter-spacing 0.2em
            font-size 20px
            -webkit-text-security disc !important
            -moz-text-security disc !imporant
            -o-text-security disc !imporant
            text-security disc !important
        p
          font-weight 300
    .confirm-btn
      position absolute
      bottom 10px
      left calc(50% - 125px)
      cursor pointer 
      button
        border 5px solid transparent
        background #0E39FE
        width 250px
        height 45px
        color #F1FAFB
        font-size .7em
        font-family "Lato"
        letter-spacing 1px
        text-transform uppercase
        cursor pointer
        outline none
        transition all .3s ease
        &:hover,&:focus
          transition all .5s ease
          border 5px solid #6C85FF
    span
      margin-top 30px
    .blog-container
      margin-top 100px
      padding-top 10px
      .blockarea
        margin-bottom 10px
        color #50514f
      a
        text-decoration none
      button 
        cursor pointer
        overflow hidden
        outline none
        text-transform uppercase
        color white
        background #FE938C 
        letter-spacing 0.1em 
        font-weight 400
        padding 0.5rem 1.5rem 0.5rem 1.5rem
        border none
        position relative
        -webkit-transition all .7s ease
        transition all .7s ease
        &:hover
          background transparent
          color #FE938C 
          &:before , &:after
            -webkit-transition all .7s ease
            transition all .7s ease
            width 100%
        &:before , &:after
          content ''
          position absolute
          top 0
          left 0px
          width 0px
          height 2px
          background #FE938C 
          transition all .4s ease
        &:after
          top inherit
          left inherit
          bottom 0
          right 0
@media(max-width:560px)
  body
    .box-contain
      width 300px
      height 400px
      #blue-border
        top -13px
        left -13px
        height calc(95% + 3px)
        width calc(95% + 3px)
        .form-info
          padding 50px
          h3
            font-size 1.8em
            letter-spacing 1px
      .form-contain
        width 80%
        .input-contain
          margin-top 30px
          input[type="text"],input[type="password"],#password 
            width 200px
            height 35px
            padding 5px 10px
            line-height 40px
        .confirm-btn
          left calc(50% - 100px)
          button
            width 200px
      .blog-container
        margin-top 130px

              
            
!

JS

              
                checkSize();
function checkSize() {
    if ($(window).width() > 560) {
        countt = 0;
        $("#Email").focus(function() {
            $('#Email').css("color", "#0E39FE");
            $('#password').css("color", "#F1FAFB");
            $("#blue-border").css({
                width: "355px",
                height: "45px",
                top: "135px",
                left: "95px",
                "border-color": "#0E39FE",
                "border-width": "8px",
                "z-index": "5",
            });
            $(".title-contain h2").html("Type your email");
            $(".title-contain p").html("new?");
        });
      
        $("#password").focus(function() {
            $('#password').css("color", "#0E39FE");
            $('#Email').css("color", "#F1FAFB");
            $("#blue-border").css({
                width: "355px",
                height: "45px",
                top: "205px",
                left: "95px",
                "border-color": "#0E39FE",
                "border-width": "8px",
                "z-index": "5",
            });
            $(".title-contain h2").html("choose you password");
            $(".title-contain p").html("feel the magic");
        });

        $(".confirm-btn button").focus(function() {
            $("#blue-border").css({
                width: "250",
                height: "45px",
                top: "95%",
                left: "calc(50% - 125px)",
                "border-color": "transparent",
                "border-width": "1px",
                "z-index": "-1",
            });
        });

        $(".confirm-btn button").click(function() {
            $("#blue-border").css({
                width: "calc(100% - 17px)",
                height: "calc(100% - 17px)",
                top: "-13px",
                left: "-13px",
                "border-color": "#0E39FE",
                "border-width": "5px",
                "z-index": "0",
            });
        });
    } else {

        $("#Email").focus(function() {
            $('#Email').css("color", "#0E39FE");
            $('#password').css("color", "#F1FAFB");
            $("#blue-border").css({
                width: "215px",
                height: "40px",
                top: "155px",
                left: "35px",
                "border-color": "#0E39FE",
                "border-width": "8px",
                "z-index": "5",
            });
            $(".title-contain h2").html("Type your email");
            $(".title-contain p").html("first time?");
        });
      
        $("#password").focus(function() {
            $('#password').css("color", "#0E39FE");
            $('#Email').css("color", "#F1FAFB");
            $("#blue-border").css({
                width: "215px",
                height: "40px",
                top: "220px",
                left: "35px",
                "border-color": "#0E39FE",
                "border-width": "8px",
                "z-index": "5",
            });
            $(".title-contain h2").html("choose you password");
            $(".title-contain p").html("feel the magic");
        });

        $(".confirm-btn button").click(function() {
            $("#blue-border").css({
                width: "calc(95% + 3px)",
                height: "calc(95% + 3px)",
                top: "-13px",
                left: "-13px",
                "border-color": "#0E39FE",
                "border-width": "5px",
                "z-index": "0",
            });
        });
    }
}

$(".confirm-btn button").click(function() {

    $(".form-contain").addClass("form-disappear");
    $(".form-info h3").delay(300).fadeIn(700);
    $('#password').removeClass('disc');
    if ($(window).width() < 560) {
        $(".form-info h3").css("font-size", "1.8em");
    }else{
        $(".form-info h3").css("font-size", "3em");
    }
    $(".form-info").delay(500).addClass("info-disappear");

    setTimeout(function() {
        $("#Email").val("");
        $("#password").val("");

        $(".title-contain h2").html("Try the Form");
        $(".title-contain p").html("sign up and see the magic");

        $(".form-contain").removeClass("form-disappear");
        $(".form-info").removeClass("info-disappear");
        $(".form-info h3").hide();

    }, 4000);

});

(function() {

    var input = document.getElementById('Email');
    var blue = document.getElementById('blue-border');
    var form = document.getElementById('form');
    var elem = document.createElement('div');
    elem.id = 'notify';
    elem.style.display = 'none';

    form.appendChild(elem);

    input.addEventListener('invalid', function(event) {
        event.preventDefault();
        if (!event.target.validity.valid) {
            input.className = 'invalid animated shake';
            blue.className = 'invalid animated shake';
            $("#blue-border").css("border-color", "#ff4d4d");
            $('#Email').css("color", "#ff4d4d");

            setTimeout(function() {
                input.className = "";
                blue.className = "";
                $("#blue-border").css("border-color", "#0E39FE");
                $('#Email').css("color", "#0E39FE");
            }, 1000);
        }
    });

    input.addEventListener('input', function(event) {
        if ('block' === elem.style.display) {
            input.className = '';
            elem.style.display = 'none';
        }
    });

})();

var x = document.getElementById("password");
document.getElementById
var style = window.getComputedStyle(x);

if (style.webkitTextSecurity){}else{
    x.setAttribute("type", "password");
}

$('#password').on('keyup', function() {
    if (this.value.length == 0) {
        $('#password').removeClass('disc');
        $('#password').removeClass('circle');
        $('#password').removeClass('square');
        $(".title-contain p").html("feel the magic");
    } else if (this.value.length < 4) {
        $('#password').removeClass('disc');
        $('#password').removeClass('square');
        $('#password').addClass('circle');
        $(".title-contain p").html("keep going.");
    } else if (this.value.length < 7) {
        $('#password').removeClass('circle');
        $('#password').removeClass('square');
        $('#password').addClass('disc');
        $(".title-contain p").html("almost!");
    } else if (this.value.length < 10) {
        $('#password').removeClass('disc');
        $('#password').removeClass('circle');
        $('#password').addClass('square');
        $(".title-contain p").html("great!");
    }
});
window.addEventListener('resize', checkSize);
              
            
!
999px

Console