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HTML

              
                
        <!-- Start Card Flip -->
        
        <div class="card">
            
            <!-- Start Front -->
            
            <div class="front">
            
                <h2>signup</h2>
                <form class="forms">
                  
              <input type="text" placeholder="Enter your Name"                 maxlength="30" />
              <input type="email" placeholder="Enter your Email"        maxlength="30" /> 
              <input type="password" placeholder="Enter the password"                     maxlength="30" /> 
              <input type="password" placeholder="Reenter password"                     maxlength="30" />
                    <br />      
              <input type="submit" value="signup" />        
                </form>
                
            </div>
            
            <!-- End Front -->
            
            <!-- Start back -->
            
            <div class="back">
                 <h2>login</h2>
                <form class="forms">
                  
              <input type="text" placeholder="Enter your Name"                 maxlength="30" />
              <input type="email" placeholder="Enter your Email"        maxlength="30" /> 
              <input type="password" placeholder="Enter the password"                     maxlength="30" /> 
              <input type="password" placeholder="Reenter password"                     maxlength="30" />
                    <br />      
              <input type="submit" value="login" />        
                </form>
            </div>
            
           <!-- End Front -->
            
            </div>
        
        <!-- End Card Flip -->
              
            
!

CSS

              
                /* style Css3 */

*{box-sizing:border-box;}

body{perspective:500px; background:#131111;}

/*Style css3*/

/*Start Card */

.card
{

    width:300px;
    height:400px;
    margin:50px auto;
    position:relative;
    transition:all 2s ease-in-out;
    -webkit-transform-style:preserve-3d; /*Google chrome*/
    -moz-transform-style:preserve-3d; /*Firefox*/
    -o-transform-style:preserve-3d; /*Firefox*/
    -ms-transform-style:preserve-3d; /*Internet Explorer*/
    transform-style:preserve-3d;
}

.card:hover
{

    -webkit-transform: rotateY(180deg); /*Google chrome*/
    -moz-transform: rotateY(180deg); /*Firefox*/
    -o-transform: rotateY(180deg); /*Firefox*/
    -ms-transform: rotateY(180deg); /*Internet Explorer*/
    transform: rotateY(180deg);
}

.card > div 
{

    width:100%;
    height:100%; 
    color:#FFF;
    text-align:center;
    font:10px tahoma;
    position:absolute;
    top:0;
    left:0;
     -webkit-border-radius:4px; /*Google chrome*/
    -moz-border-radius:4px; /*Firefox*/
    -o-border-radius:4px; /*Firefox*/
    -ms-border-radius:4px; /*Internet Explorer*/
    border-radius:4px;
    text-transform:uppercase;
}

/*End Card*/


/* Start front */

.front{z-index:2;}

.front
{
 
     -webkit-backface-visibility:hidden; /*Google chrome*/
    -moz-backface-visibility:hidden; /*Firefox*/
    -o-backface-visibility:hidden; /*Firefox*/
    -ms-backface-visibility:hidden; /*Internet Explorer*/
    backface-visibility:hidden;
    border:2px solid #42E449;
    background-color:#131111; 

}

.front h2{margin: 21px 0;}

.front .forms input{margin-bottom:20px;}

.front .forms input[type="text"]
{

    width:80%;
    border:1px solid #2BAF85;
    background:none; 
    padding:10px; 
     -webkit-border-radius:4px; /*Google chrome*/
    -moz-border-radius:4px; /*Firefox*/
    -o-border-radius:4px; /*Firefox*/
    -ms-border-radius:4px; /*Internet Explorer*/
    border-radius:4px;
    color:#42E449;
    text-transform:capitalize; 
}

.front .forms input[type="email"]
{

    width:80%;
    border:1px solid #2BAF85;
    background:none; 
    padding:10px; 
    -webkit-border-radius:4px; /*Google chrome*/
    -moz-border-radius:4px; /*Firefox*/
    -o-border-radius:4px; /*Firefox*/
    -ms-border-radius:4px; /*Internet Explorer*/
    border-radius:4px;
    color:#42E449;
    text-transform:capitalize; 
}

.front .forms input[type="password"]
{

    width:80%;
    border:1px solid #2BAF85;
    background:none; 
    padding:10px; 
    -webkit-border-radius:4px; /*Google chrome*/
    -moz-border-radius:4px; /*Firefox*/
    -o-border-radius:4px; /*Firefox*/
    -ms-border-radius:4px; /*Internet Explorer*/
    border-radius:4px;
    color:#42E449;
    text-transform:capitalize; 
}

.front .forms input[type="submit"]
{

    width:40%;
    border:1px solid #15D133;
    background:none; 
    padding:10px; 
    -webkit-border-radius:4px; /*Google chrome*/
    -moz-border-radius:4px; /*Firefox*/
    -o-border-radius:4px; /*Firefox*/
    -ms-border-radius:4px; /*Internet Explorer*/
    border-radius:4px;
    color:#15D133;
    text-transform:capitalize; 
}

.front .forms input[type="submit"]:hover
{background-color:#15D133; color:#FFF;}


/* End front */


/* Start back */

.back{z-index:1;}

.back
{
 
     -webkit-backface-visibility:hidden; /*Google chrome*/
    -moz-backface-visibility:hidden; /*Firefox*/
    -o-backface-visibility:hidden; /*Firefox*/
    -ms-backface-visibility:hidden; /*Internet Explorer*/
    backface-visibility:hidden;
    border:2px solid #E20AB7;
    -webkit-transform: rotateY(180deg);
}

.back h2{margin: 21px 0;}

.back .forms input{margin-bottom:20px;}

.back .forms input[type="text"]
{

    width:80%;
    border:1px solid #BB154A;
    background:none; 
    padding:10px; 
     -webkit-border-radius:4px; /*Google chrome*/
    -moz-border-radius:4px; /*Firefox*/
    -o-border-radius:4px; /*Firefox*/
    -ms-border-radius:4px; /*Internet Explorer*/
    border-radius:4px;
    color:#42E449;
    text-transform:capitalize; 
}

.back .forms input[type="email"]
{

    width:80%;
    border:1px solid #BB154A;
    background:none; 
    padding:10px; 
    -webkit-border-radius:4px; /*Google chrome*/
    -moz-border-radius:4px; /*Firefox*/
    -o-border-radius:4px; /*Firefox*/
    -ms-border-radius:4px; /*Internet Explorer*/
    border-radius:4px;
    color:#42E449;
    text-transform:capitalize; 
}

.back .forms input[type="password"]
{

    width:80%;
    border:1px solid #BB154A;
    background:none; 
    padding:10px; 
    -webkit-border-radius:4px; /*Google chrome*/
    -moz-border-radius:4px; /*Firefox*/
    -o-border-radius:4px; /*Firefox*/
    -ms-border-radius:4px; /*Internet Explorer*/
    border-radius:4px;
    color:#42E449;
    text-transform:capitalize; 
}

.back .forms input[type="submit"]
{

    width:40%;
    border:1px solid #E20AB7;
    background:none; 
    padding:10px; 
    -webkit-border-radius:4px; /*Google chrome*/
    -moz-border-radius:4px; /*Firefox*/
    -o-border-radius:4px; /*Firefox*/
    -ms-border-radius:4px; /*Internet Explorer*/
    border-radius:4px;
    color:#E20AB7;
    text-transform:capitalize; 
}

.back .forms input[type="submit"]:hover
{background-color:#E20AB7; color:#FFF;}

/* End back */
              
            
!

JS

              
                
              
            
!
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