body{margin:0;background:#f3f6fb;color:#111827;font-family:Arial,Helvetica,sans-serif}*{box-sizing:border-box}button{cursor:pointer}.card{background:white;border-radius:14px;box-shadow:0 8px 24px rgba(15,23,42,.08);padding:18px}.btn{display:inline-block;background:#2563eb;color:white;border-radius:10px;padding:10px 14px;font-weight:700;border:none;text-decoration:none}.input{border:1px solid #d1d5db;border-radius:10px;padding:10px;width:100%}