:root{--navy:#0b1f3b;--navy-light:#16294a;--jade:#00a878;--jade-dark:#00835e;--bg:#fff;--surface:#f6f8fb;--text:#16213e;--muted:#5b6b82;--border:#e1e6ed;--danger:#c23b3b;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);margin:0}.app-header{color:var(--navy);text-align:center;border-bottom:2px solid var(--jade);background:#fff;padding:28px 20px 24px}.logo-img{width:220px;max-width:100%;height:auto;margin:0 auto;display:block}.tagline{color:var(--navy);margin:10px 0 0;font-size:.95rem;font-weight:600}@media (width>=560px){.logo-img{width:300px}}@media (width>=900px){.logo-img{width:340px}}.container{max-width:760px;margin:0 auto;padding:20px 16px 48px}.intro{text-align:center;margin:0 0 18px}.intro h2{color:var(--navy);margin:0 0 8px;font-size:1.25rem;line-height:1.3}.intro 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