.supernova-bg{position:fixed;top:0;left:0;width:100vw;height:100vh;z-index:-2;overflow:hidden;background:radial-gradient(circle at center,rgba(255,220,180,.3) 5%,rgba(0,0,0,.95) 100%);filter:blur(80px);animation:supernovaPulse 14s ease-in-out infinite alternate}.supernova-flash{position:fixed;top:0;left:0;width:100vw;height:100vh;background:radial-gradient(circle at center,rgba(255,255,180,.8),rgba(255,200,50,.1),transparent 70%);z-index:-1;opacity:0;pointer-events:none;animation:flashFade 1.5s ease-out forwards}