.placeholder{cursor:wait;opacity:.5;vertical-align:middle;background-color:currentColor;min-height:1em;display:inline-block}.placeholder.btn:before{content:"";display:inline-block}.placeholder-xs{min-height:.6em}.placeholder-sm{min-height:.8em}.placeholder-lg{min-height:1.2em}.placeholder-glow .placeholder{animation:2s ease-in-out infinite placeholder-glow}@keyframes placeholder-glow{50%{opacity:.2}}.placeholder-wave{animation:2s linear infinite 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%}@keyframes placeholder-wave{to{-webkit-mask-position:-200% 0;mask-position:-200% 0}}