body,html{height:100%;margin:0;padding:0;overflow-y:auto;scroll-behavior:smooth}*{box-sizing:border-box}@keyframes fadeInUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeInRight{0%{opacity:0;transform:translateX(30px)}to{opacity:1;transform:translateX(0)}}@keyframes fadeInLeft{0%{opacity:0;transform:translateX(-30px)}to{opacity:1;transform:translateX(0)}}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}.back-to-top-button{position:fixed;bottom:2rem;right:2rem;padding:1rem 1.2rem;border-radius:50%;background:linear-gradient(135deg,#0070f3,#7928ca);color:#fff;border:none;cursor:pointer;box-shadow:0 8px 20px rgba(0,112,243,.3);transition:all .3s cubic-bezier(.4,0,.2,1);opacity:0;transform:scale(.8);z-index:999;font-size:1.2rem}.back-to-top-button.show{opacity:1;transform:scale(1)}.back-to-top-button:hover{transform:scale(1.1) translateY(-3px);box-shadow:0 12px 28px rgba(0,112,243,.4)}.glass-card{background:hsla(0,0%,100%,.1);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:16px;border:1px solid hsla(0,0%,100%,.2);box-shadow:0 8px 32px rgba(0,0,0,.1)}a{transition:all .3s ease}