*{margin:0;padding:0;box-sizing:border-box}body{overflow:hidden;font-family:system-ui,-apple-system,sans-serif}#app{width:100vw;height:100vh;background-color:#282827}canvas{display:block;background:transparent;position:relative;z-index:1000}@keyframes canvasFadeOut{0%{opacity:1}to{opacity:0}}@keyframes canvasFadeIn{0%{opacity:0}to{opacity:1}}.content-wrapper{text-align:center;color:#fff;font-family:system-ui,-apple-system,sans-serif}.content-wrapper h1{font-size:3rem;margin-bottom:2rem;font-weight:300}#return-btn{background:#ffffff1a;border:1px solid rgba(255,255,255,.3);color:#fff;padding:1rem 2rem;font-size:1.1rem;border-radius:.5rem;cursor:pointer;transition:all .3s ease}#html-content{position:absolute;top:0;left:0;width:100%;height:100%;background-color:#282827;display:flex;align-items:center;justify-content:center;z-index:999}#return-btn:hover{background:#fff3;border-color:#ffffff80}