style.css

@import url("https://fonts.googleapis.com/css?family=Nunito:400,900|Monsterrat|Roboto");
body{
    background: linear-gradient(to right, #2ed573, #f9ca24);
    overflow-x: hidden;
}
 .container
 {
    background: #fff;
    Width: 540px; 
    height: 450px;
    margin: 0 auto;
    position: relative;
    margin-top: 10%;
    box-shadow: 2px 5px 20px
     rgba(119,119,119,.5);
 }
 .leftbox
 {
    float: left;
    top: -5%;
    left: 5%;
    position: absolute;
    width: 15%;
    height: 110%;
    background: #2ed573;
    box-shadow: 3px 3px 10px
    rgba(119,119,119,.5);
    border: .1em solid #fff;
 }
nav a{
    list-style: none;
    padding: 35px;
    color: #fff;
    font-size: 1.1em;
    display: block;
    transition: all .3s ease-in-out;
}

nav a:hover{
    color: #10ac84;
    cursor: pointer;
    transform: scale(1,2);

}

nav a:first-child{
    margin-top: 7px;
}

nav a .active{
    color: #10ac84;

}


 .rightbox
 {
    width: 60%;
    margin-left: 27%;
     padding-top: 5px;
 }
 .tabShow
 {
    transition: all .5s ease-in;
    width: 80%;
    position: absolute;
 }
 h1{
     font-family: "Monsterrat", sans-serif;
     color: #7ed386;
     font-size: 1.2rem;
     margin-top: 40px;
     margin-bottom: 35px;
 }
 h2
 {
    color: #777;
    font-family: "Roboto", sans-serif;
    text-transform: uppercase;
    font-size: 8px;
    letter-spacing: 1px;
    margin-left: 2px;
    margin-top: 10px;
 }
 .input, p {
     border: 0;
     border-bottom: 1px solid #3fb6a8;
     width: 80%;
     font-family: 'Monsterrat', sans-serif;
     font-size: .7em;
     padding: 7px 0;
     color: #070707;
     outline: none;
 }
 span{
     font-size: .7em;
     color: #777
 }
 .btn{
    font-family: "roboto", sans-serif;
    text-transform: uppercase;
    font-size: 15px;
    border: 0;
    color: #fff;
    background: #7ed386;
    padding: 7px 15px;
    box-shadow:  0px 2px 4px 0px
     rgba(0,0,0,.2);
     cursor: pointer;
     margin-top: 15px;

 }
 .tabShow{
     display: none;
 }