Style SVG circle with CSS

Want to only use CSS? Use line instead of circle.

<svg xmlns="http://www.w3.org/2000/svg" version="1.1">
    <style>
    .circle {
        stroke-width: 59;
        stroke-linecap: round;
    }
    .circle:hover {
        stroke-width: 71;
    }
    </style>
    <line x1="168" y1="179" x2="168" y2="179" stroke="white" class="circle" />
</svg>

http://jsfiddle.net/rLk7rd8b/