* {
    -moz-box-sizing: border-box;
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    list-style: none;
    position: relative;
}

.csstransforms .cn-wrapper {
    font-size: 1em;
    width: 26em;
    height: 26em;
    overflow: hidden;
    position: fixed;
    z-index: 900;
    bottom: -13em;
    left: 50%;
    border-radius: 50%;
    margin-left: -13em;
    -webkit-transform: scale(0.1);
    -ms-transform: scale(0.1);
    -moz-transform: scale(0.1);
    transform: scale(0.1);
    pointer-events: none;
    -webkit-transition: all .3s ease;
    -moz-transition: all .3s ease;
    transition: all .3s ease;
}

.csstransforms .opened-nav {
    border-radius: 50%;
    pointer-events: auto;
    -webkit-transform: scale(1);
    -moz-transform: scale(1);
    -ms-transform: scale(1);
    transform: scale(1);
}

.cn-overlay {
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.6);
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    opacity: 0;
    visibility: hidden;
    -webkit-transition: all .3s ease;
    -moz-transition: all .3s ease;
    transition: all .3s ease;
    z-index: 880;
}

    .cn-overlay.on-overlay {
        visibility: visible;
        opacity: 1;
    }

.cn-button {
    border: none;
    background: none;
    color: #fff;
    text-align: center;
    font-size: 1.8em;
    padding-bottom: 1em;
    height: 3.5em;
    width: 3.5em;
    background-color: hsla(0, 100%, 70%, 1);
    position: fixed;
    left: 50%;
    margin-left: -1.75em;
    bottom: -1.75em;
    border-radius: 50%;
    cursor: pointer;
    z-index: 1000;
}

    .cn-button:hover,
    .cn-button:active,
    .cn-button:focus {
        color: #fff;
        box-shadow: 0 0 50px #000;
        background-color: hsla(0, 100%, 65%, 1);
    }

.csstransforms .cn-wrapper li {
    position: absolute;
    font-size: 1.5em;
    width: 10em;
    height: 10em;
    -webkit-transform-origin: 100% 100%;
    -moz-transform-origin: 100% 100%;
    -ms-transform-origin: 100% 100%;
    transform-origin: 100% 100%;
    overflow: hidden;
    left: 50%;
    top: 50%;
    margin-top: -1.3em;
    margin-left: -10em;
    -webkit-transition: border .3s ease;
    -moz-transition: border .3s ease;
    transition: border .3s ease;
              
}

    .csstransforms .cn-wrapper li a {
        display: block;
        font-size: 1.18em;
        height: 14.5em;
        width: 14.5em;
        position: absolute;
        bottom: -7.25em;
        right: -7.25em;
        border-radius: 50%;
        text-decoration: none;
        color: #fff;
        padding-top: 1.8em;
        text-align: center;
        -webkit-transform: skew(-50deg) rotate(-70deg) scale(1);
        -ms-transform: skew(-50deg) rotate(-70deg) scale(1);
        -moz-transform: skew(-50deg) rotate(-70deg) scale(1);
        transform: skew(-50deg) rotate(-70deg) scale(1);
        -webkit-backface-visibility: hidden;
        -webkit-transition: opacity 0.3s, color 0.3s;
        -moz-transition: opacity 0.3s, color 0.3s;
        transition: opacity 0.3s, color 0.3s;

    }

        .csstransforms .cn-wrapper li a span {
            font-size: 1.1em;
            opacity: 0.7;

        }

    /* for a central angle x, the list items must be skewed by 90-x degrees
in our case x=40deg so skew angle is 50deg
items should be rotated by x, minus (sum of angles - 180)2s (for this demo) */

    .csstransforms .cn-wrapper li:first-child {
        -webkit-transform: rotate(-10deg) skew(50deg);
        -ms-transform: rotate(-10deg) skew(50deg);
        -moz-transform: rotate(-10deg) skew(50deg);
        transform: rotate(-10deg) skew(50deg);
    }

    .csstransforms .cn-wrapper li:nth-child(2) {
        -webkit-transform: rotate(30deg) skew(50deg);
        -ms-transform: rotate(30deg) skew(50deg);
        -moz-transform: rotate(30deg) skew(50deg);
        transform: rotate(30deg) skew(50deg);
    }

    .csstransforms .cn-wrapper li:nth-child(3) {
        -webkit-transform: rotate(70deg) skew(50deg);
        -ms-transform: rotate(70deg) skew(50deg);
        -moz-transform: rotate(70deg) skew(50deg);
        transform: rotate(70deg) skew(50deg);
    }

    .csstransforms .cn-wrapper li:nth-child(4) {
        -webkit-transform: rotate(110deg) skew(50deg);
        -ms-transform: rotate(110deg) skew(50deg);
        -moz-transform: rotate(110deg) skew(50deg);
        transform: rotate(110deg) skew(50deg);
    }

    .csstransforms .cn-wrapper li:nth-child(5) {
        -webkit-transform: rotate(150deg) skew(50deg);
        -ms-transform: rotate(150deg) skew(50deg);
        -moz-transform: rotate(150deg) skew(50deg);
        transform: rotate(150deg) skew(50deg);
    }

    .csstransforms .cn-wrapper li:nth-child(odd) a {
        background-color: #a11313;
        background-color: hsla(0, 100%, 58%, 1);
    }

    .csstransforms .cn-wrapper li:nth-child(even) a {
        background-color: #a61414;
        background-color: hsla(0, 100%, 61%, 1);
    }

    /* active style */
    .csstransforms .cn-wrapper li.active a {
        background-color: #b31515;
        background-color: hsla(0, 100%, 65%, 1);
    }


    /* hover style */
    .csstransforms .cn-wrapper li:not(.active) a:hover,
    .csstransforms .cn-wrapper li:not(.active) a:active,
    .csstransforms .cn-wrapper li:not(.active) a:focus {
        background-color: #b31515;
        background-color: hsla(0, 100%, 70%, 1);
    }

    .csstransforms .cn-wrapper li:not(.active) a:focus {
        position: fixed;
    }


/* fallback */
.no-csstransforms .cn-button {
    display: none;
}

.no-csstransforms .cn-wrapper li {
    position: static;
    float: left;
    font-size: 1em;
    height: 5em;
    width: 5em;
    background-color: #eee;
    text-align: center;
    line-height: 5em;
}

    .no-csstransforms .cn-wrapper li a {
        display: block;
        width: 100%;
        height: 100%;
        text-decoration: none;
        color: inherit;
        font-size: 1.3em;
        border-right: 1px solid #ddd;
    }

        .no-csstransforms .cn-wrapper li a:last-child {
            border: none;
        }

        .no-csstransforms .cn-wrapper li a:hover,
        .no-csstransforms .cn-wrapper li a:active,
        .no-csstransforms .cn-wrapper li a:focus {
            background-color: white;
        }

    .no-csstransforms .cn-wrapper li.active a {
        background-color: #6F325C;
        color: #fff;
    }

.no-csstransforms .cn-wrapper {
    font-size: 1em;
    height: 5em;
    width: 25.15em;
    bottom: 0;
    margin-left: -12.5em;
    overflow: hidden;
    position: fixed;
    z-index: 990;
    left: 50%;
    border: 1px solid #ddd;
}

@media screen and (max-width:480px) {
    .csstransforms .cn-wrapper {
        font-size: .68em;
    }

    .cn-button {
        font-size: 1em;
    }

    .csstransforms .cn-wrapper li {
        font-size: 1.52em;
    }
}

@media screen and (max-width:320px) {
    .no-csstransforms .cn-wrapper {
        width: 15.15px;
        margin-left: -7.5em;
    }

        .no-csstransforms .cn-wrapper li {
            height: 3em;
            width: 3em;
        }
}