:root{--foreground-rgb:0,0,0;--background-start-rgb:214,219,220;--background-end-rgb:255,255,255}body{margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif;color:rgb(var(--foreground-rgb));background:linear-gradient(to bottom,transparent,rgb(var(--background-end-rgb))) rgb(var(--background-start-rgb))}a{color:inherit;text-decoration:none}*{box-sizing:border-box}.container{max-width:800px;margin:0 auto;padding:2rem}.btn{display:inline-block;background:#0070f3;color:#fff;padding:12px 24px;border-radius:4px;border:none;cursor:pointer;font-size:1rem;font-weight:600;transition:background .2s ease}.btn:hover{background:#0051a2}.card{background:#fff;padding:2rem;border-radius:8px;box-shadow:0 4px 6px rgba(0,0,0,.1);margin-bottom:2rem}.input-group{margin-bottom:1rem}.input-group label{display:block;margin-bottom:.5rem;font-weight:500}.input-group input{width:100%;padding:.5rem;border:1px solid #ccc;border-radius:4px}