.gradient-background{opacity:.6;background:var(--background-gradient-src) no-repeat;background-size:cover;background-position:center;height:100vh;width:100vw;position:fixed;top:0;left:0;z-index:-1}.on-gradient-background{height:100vh;width:100vw;position:fixed;top:0;left:0;z-index:-1}