a.button21{display:inline-block;width:auto;height:auto;margin-bottom:10px;margin-top:10px;margin-left:20px;padding-left:5px;padding-right:5px;line-height:2em;vertical-align:middle;text-align:center;text-decoration:none;user-select:none;color:#000;outline:none;border:1px solid rgba(0,0,0,.4);border-top-color:rgba(0,0,0,.3);border-radius:2px;background:linear-gradient(#fff,#f0f0f0);box-shadow:0 0 3px rgba(0,0,0,0) inset,0 1px 1px 1px rgba(255,255,255,.2),0 -1px 1px 1px rgba(0,0,0,0);transition:.2s ease-in-out}a.button21:hover:not(:active){box-shadow:0 0 3px rgba(0,0,0,0) inset,0 1px 1px 1px rgba(0,255,255,.5),0 -1px 1px 1px rgba(0,255,255,.5)}a.button21:active{background:linear-gradient(#fafafa,#ebebeb);box-shadow:0 0 3px rgba(0,0,0,.5) inset,0 1px 1px 1px rgba(255,255,255,.4),0 -1px 1px 1px rgba(0,0,0,.1)}