.viewer-nav-btn{align-items:center;background:#00000059;border:none;border-radius:50%;color:#fff;cursor:pointer;display:flex;height:48px;justify-content:center;position:fixed;top:50%;transform:translateY(-50%);transition:background .2s;width:48px;z-index:99999}.viewer-nav-btn:hover{background:#0000008c}.viewer-nav-btn--prev{left:20px}.viewer-nav-btn--next{right:20px}@media(max-width:640px){.viewer-nav-btn{height:40px;width:40px}.viewer-nav-btn svg{height:24px;width:24px}.viewer-nav-btn--prev{left:8px}.viewer-nav-btn--next{right:8px}}