*{box-sizing:border-box;margin:0}:root{--ink: #111827;--ink-soft: #4b5563;--paper: #f7f7f5;--card: #ffffff;--line: #e5e7eb;--accent: #dc2626;--accent-soft: rgba(220, 38, 38, .32)}html,body{height:100%}body{font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--paper);color:var(--ink);line-height:1.55}.shell{min-height:100vh;display:flex;flex-direction:column}.header{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 24px;background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}.brand-mark{font-size:20px;font-weight:800;letter-spacing:-.02em}.brand-mark b{color:var(--accent)}.header-badge{font-size:13px;color:var(--ink-soft);background:#f0fdf4;border:1px solid #bbf7d0;border-radius:999px;padding:4px 12px;white-space:nowrap}.landing{width:min(880px,100% - 48px);margin:0 auto;padding:56px 0 40px;text-align:center}.landing 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