body{margin:0;font-family:Arial,sans-serif;background:#f5f7fb;color:#1f2937}.topbar{padding:16px 20px;background:#1e3a8a;color:#fff;font-weight:700}.page{padding:24px}.shell{min-height:100vh}.card{background:#fff;border-radius:12px;padding:16px;box-shadow:0 6px 18px #00000014}