body{font-family:Arial;background:#f5f7fb;margin:0;color:#222}.container{max-width:900px;margin:auto;padding:30px}header{background:#0b132b;color:#fff;padding:50px 30px}.card{background:#fff;padding:25px;border-radius:12px;margin:25px 0}a{color:#2563eb;text-decoration:none}.btn{background:#2563eb;color:#fff;padding:10px 16px;border-radius:8px;display:inline-block}