CSS Navigation Compass

index.css

/* Compass */
 .compass {
    background: #eee;
    width: 200px;
    height: 200px;
    border-radius: 100%;
    border: 5px solid #666;
    position: relative;
}
.arrow {
    width: 10px;
    height: 200px;
    left: 95px;
    position: absolute;
    transform:rotate(90deg);
}
.north {
    height: 100px;
    background: #e00;
    border-top-left-radius: 100%;
    border-top-right-radius: 100%;
}
.south {
    height: 100px;
    background: #fff;
    border-bottom-left-radius: 100%;
    border-bottom-right-radius: 100%;
    top: 100px;
}
.pivot {
    width: 20px;
    height: 20px;
    background: #e00;
    border-radius: 100%;
    position: absolute;
    left: 90px;
    top: 90px;
}
.north, .south, .pivot {
    -moz-box-shadow: 0px 0px 0px 1px rgba(0, 0, 0, 0.75);
    -o-box-shadow: 0px 0px 0px 1px rgba(0, 0, 0, 0.75);
    -webkit-box-shadow: 0px 0px 0px 1px rgba(0, 0, 0, 0.75);
    box-shadow: 0px 0px 0px 1px rgba(0, 0, 0, 0.75);
}

index.html

<div class="compass">
    <div class="arrow">
        <div class="north"></div>
        <div class="south"></div>
    </div>
    <div class="pivot"></div>
</div>