:root{font-family:Inter,system-ui,-apple-system,sans-serif;color:#0f172a;background:radial-gradient(circle at 20% 20%,#eef2ff,#fff 45%),radial-gradient(circle at 80% 0%,#ecfeff,#fff 40%);min-height:100vh}body{margin:0;background:transparent}a{color:#2563eb;text-decoration:none}.container{background:#fff;border:1px solid #e5e7eb;border-radius:16px;box-shadow:0 10px 40px #0f172a14}button{transition:transform .12s ease,box-shadow .12s ease,opacity .12s ease}button:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 6px 18px #2563eb26}button:active:not(:disabled){transform:translateY(0);box-shadow:none}