#preloader {background:#fff;height:100vh; width:100%;position:fixed;z-index:1000;display:flex;align-items:center;justify-content:center}.preloader-logo {width: 190px;height: 190px;background:url(../images/logo.svg) center center/contain no-repeat;animation:1s linear infinite flashLogo}@keyframes flashLogo{0%,100%{opacity:1}50%{opacity:.2}}