box-shadow implements lightsaber

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title></title>
    <style>
        /* defaults */
        html {
            -moz-box-sizing: border-box;
            box-sizing: border-box;
            font-size: 16px;
        }
        *,
        *:before,
        *:after {
            -moz-box-sizing: inherit;
            box-sizing: inherit;
        }
        body,
        html {
            height: 100%;
            background-color: black;
            color: white;
        }
        a {
            color: inherit;
        }

        /* cf */
        .cf:before,
        .cf:after {
            content: " ";
            display: table;
        }
        .cf:after {
            clear: both;
        }
        .cf {
            *zoom: 1;
        }



        /* lightsaber */
        .lightsaber-cont {
            height: 100%;
            text-align: center;
        }
        .lightsaber-cont:before {
            display: inline-block;
            height: 100%;
            margin-right: -0.25em;
            vertical-align: middle;
            content: "";
        }
        .lightsaber {
            display: inline-block;
            width: 85%;
            height: 20px;
            vertical-align: middle;
        }

        /* blade */
        @keyframes blade-glow {
            0% {
                box-shadow: 20px 0 50px 6px;
            }
            50% {
                box-shadow: 20px 0 50px 12px;
            }
            100% {
                box-shadow: 20px 0 50px 6px;
            }
        }
        .blade {
            float: right;
            position: relative;
            z-index: 1;
            width: 75%;
            height: 14px;
            border: 1px solid red;
            border-left: none;
            margin-top: 3px;
            border-radius: 0 47% 47% 0;
            background-color: white;
            color: red;
            animation: blade-glow 4s infinite;
        }

        /* hilt */
        .hilt {
            float: left;
            position: relative;
            z-index: 2;
            width: 25%;
            height: 100%;
            border: 1px solid #333;
            border-radius: 35% 20% 20% 35%;
            background-color: #999;
        }
    </style>
</head>
<body>
<div class="lightsaber-cont">
    <div class="lightsaber cf">
        <div class="blade"></div>
        <div class="hilt"></div>
    </div>
</div>

</body>
</html>
box-shadow implements lightsaber

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