*{
margin: 0;
padding: 0;
box-sizing: border-box;
}
html,body{
height: 100%;
width: 100%;
}

body{

    background-color: #eafbff;
    background-image: linear-gradient(to bottom, #eafbff 0%, #eafbff 50%, #5290f9 50%, #5290f9 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    
}

nav{
    background-color: #fff;
    padding: 20px;
    width: 80px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 3px ;
    box-shadow: 0 2px 5px rgb(29, 28, 28);
    transition: width 0.6s linear;
}

nav.active{
    width: 350px;
}

nav ul{
    display: flex;
    list-style-type: none;
    padding: 0;
    margin: 0;
    width: 0;
    transition:  width 0.6s linear;
}

nav.active  ul{
    width: 100%;
}

nav ul li{
    transform:  rotateY(0deg);
    opacity: 0;
    transition: transform 0.6s linear, opacity 0.6s linear;
}

nav.active ul li{
opacity: 1;
transform: rotateY(360deg);
}

nav ul a{
    position: relative;
    color: #000;
    text-decoration: none;
    margin: 0 10px;
}

.icon{
    background-color: #fff;
    border: 0;
    cursor: pointer;
    padding: 0;
    position: relative;
    height: 30px;
    width: 30px;
}

.icon:focus{
    outline:0;
}

.icon .line{
    background-color: #5390f9;
    height: 2px;
    width: 20px;
    position: absolute;
    top: 10px;
    left: 5px;
    transition: transform 0.6s linear;
}

.icon .line2{
    top: auto;
    bottom: 10px;
}

nav.active .icon .line1{
    transform:  rotate(-765deg) translateY(5.5px);
}


nav.active .icon .line2{
    transform:  rotate(765deg) translateY(-5.5px);
}