.loader{border:4px solid rgba(255,255,255,.1);border-radius:50%;animation:spin 1s linear infinite}.loader-small{width:24px;height:24px;border-width:3px}.loader-medium{width:48px;height:48px;border-width:4px}.loader-large{width:72px;height:72px;border-width:6px}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}