.nav-down,.nav-up{display:none;position:fixed;z-index:9999;right:0;background:#4F4F4F;border:1px solid #ccc;border-radius:5px;cursor:pointer;color:#fff;text-align:center;font:normal normal 25px/25px sans-serif;text-shadow:0 1px 2px #000;opacity:.5;padding:3px;margin-bottom:5px;width:25px;height:25px}.nav-up{bottom:40px}.nav-down{bottom:5px}.nav-down:hover,.nav-up:hover{opacity:1;box-shadow:0 5px .5em -1px #666}