html,body{height:100%}body{background:url("bg.jpg") no-repeat center fixed;background-size:cover}header,footer{position:fixed;width:100%;left:0;text-align:center;padding:15px}header{top:0}footer{bottom:0}.cover-container{height:100vh;width:768px;margin:0 auto;display:flex;align-items:center;justify-content:center}.cover-panel{background-color:rgba(255,255,255,0.8);width:100%;padding:30px;border:10px solid rgba(255,255,255,0.5);border-radius:15px;box-shadow:0 4px 8px rgba(0,0,0,0.4);backdrop-filter:blur(10px)}.btn{border-radius:60px;padding-left:30px;padding-right:30px;border:3px solid white !important}