.placeholder{display:inline-block;min-height:1em;vertical-align:middle;cursor:wait;background-color:currentcolor;opacity:.5}.placeholder.btn:before{display:inline-block;content:""}.placeholder-xs{min-height:.6em}.placeholder-sm{min-height:.8em}.placeholder-lg{min-height:1.2em}.placeholder-glow .placeholder{animation:placeholder-glow 2s ease-in-out infinite}@keyframes placeholder-glow{50%{opacity:.2}}.placeholder-wave{-webkit-mask-image:linear-gradient(130deg,#000 55%,rgba(0,0,0,.8) 75%,#000 95%);mask-image:linear-gradient(130deg,#000 55%,rgba(0,0,0,.8) 75%,#000 95%);-webkit-mask-size:200% 100%;mask-size:200% 100%;animation:placeholder-wave 2s linear infinite}@keyframes placeholder-wave{to{-webkit-mask-position:-200% 0;mask-position:-200% 0}}