style.css

@import url('https://fonts.googleapis.com/css2?family=Ubuntu');

* {
  box-sizing: border-box;
}

body {
  font-family: 'Ubuntu', sans-serif;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  overflow: hidden;
  margin: 0;
}

.bg {
    background: url('https://images.unsplash.com/photo-1507525428034-b723cf961d3e?q=80&w=2073&auto=format&fit=crop&ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D') no-repeat center center/cover;
    position: absolute;
    top: -30px;
    left: -30px;
    width: calc(100vw + 60px);
    height: calc(100vh + 60px);
    z-index: -1;
    filter: blur(30px);
}

.loading-text {
    font-size: 50px;
    color: #fff;
}