html, body {
    height: 99%;
    min-height: 99%;
}
body {
    padding: 0;
    margin: 0;
}

nav {
    position: absolute;
    top: 0;
    right: 0;
    z-index: 9999;
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}
nav .menu {
    position: fixed;
    padding: 14px 0;
    /*height and padding(top/bottom) add up to 60px(same as width)*/
    height: 32px;
    width: 60px;
    top: 20px;
    right: 20px;
    border-radius: 50%;
    z-index: 999;
    cursor: pointer;
    background: rgb(255, 255, 255);
    background: linear-gradient(to bottom, rgba(255, 255, 255, 1) 0%, rgba(229, 229, 229, 1) 100%);
    box-shadow: 0px 0px 0px 2px rgba(0, 0, 0, .25);
    transition: all 300ms ease;
}
nav .menu:hover {
    transform: scale(1.1);
}
nav .menu:active {
    transform: scale(.9);
}
nav .menu .bar {
    height: 4px;
    width: 30px;
    border-radius: 2px;
    margin: 5px auto;
    display:block;
    z-index: 9999;
    background: #aaa;
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, .5);
    transition: all 300ms ease;
}
nav .menu:hover > .bar {
    background: rgba(100, 160, 255, 1);
}
nav .circle {
    opacity: 1;
    font-size: 20px;
    color: #eee;
    position: fixed;
    top: -170px;
    right: -170px;
    display: block;
    height: 400px;
    width: 400px;
    background: rgba(100, 100, 100, .9);
    box-shadow: 0px 0px 0px 2px rgba(0, 0, 0, .5), inset 0 0 200px rgba(0, 0, 0, .5);
    padding: 20px;
    transition: all 300ms ease;
    border-radius: 50%;
    overflow:hidden !important;
}
nav .circle li {
    list-style:none !important;
    background: rgba(0, 0, 0, 0);
}
nav .circle li a {
    opacity: 1;
    position: absolute;
    top: -80px;
    left: 220px;
    display:block;
    width: 500px;
    height: 300px;
    background: rgba(50, 50, 50, .5);
    box-shadow: inset 0 0 0 2px rgba(0, 0, 0, .1);
    transition: all 300ms ease;
}
nav .circle li a:hover {
    background: rgba(255, 120, 20, 1) !important;
}
nav .circle li:first-child a {
    transform: rotate(-165deg) skewX(-50deg);
}
nav .circle li:nth-child(2) a {
    transform: rotate(-205deg) skewX(-50deg);
}
nav .circle li:nth-child(3) a {
    transform: rotate(-245deg) skewX(-50deg);
}
nav .circle li:nth-child(4) a {
    transform: rotate(-285deg) skewX(-50deg);
    pointer-events: none;
}
nav .circle li:nth-child(5) a {
    transform: rotate(-325deg) skewX(-50deg);
    pointer-events: none;
}
nav .circle li:nth-child(6) a {
    transform: rotate(-45deg) skewX(-50deg);
    pointer-events: none;
}
nav .circle li:nth-child(7) a {
    transform: rotate(-5deg) skewX(-50deg);
    pointer-events: none;
}
nav .circle li:nth-child(8) a {
    transform: rotate(275deg) skewX(-50deg);
    pointer-events: none;
}
nav .circle li:last-child a {
    transform: rotate(235deg) skewX(-50deg);
    pointer-events: none;
}
nav .hidenav {
    opacity: .5;
    transform: scale(0.1) rotate(-60deg);
}