body {
    background-color: #222; font: 30px sans-serif;
}
canvas {
    border: 1px solid #AAA;
}
.slider {
    border-radius: 4px;
    width: 240px;
    height: 4px;
    margin: 16px 0;
    border: 1px solid #999;
    border-top-color: #666;
    position: relative;
    background-color: rgba(255, 255, 255, 0.4);
    position: relative;
    box-shadow: inset 0 2px 2px #444;
}
.slider span {
    border: 1px solid #FFF;
    display: block;
    width: 10px;
    height: 10px;
    border-radius: 10px;
    background-color: #999;
    position: absolute;
    top: -4px;
    left: 232px;
    box-shadow: 0px 1px 4px #333;
    background: gradient(linear, left top, left bottom, from(#DDD), to(#888));
    cursor: pointer;
}
.slider span:hover {
    border: 1px solid #DDD;
    background: gradient(linear, left top, left bottom, from(#666), to(#CCC));
}