:root{--bg:#f5f4f0;--ink:#111312;--muted:#666b68;--line:#d7d8d3;--panel:#fff;--accent:#0a66c2;--accent2:#e8f2fc;--dark:#101820;--success:#147a49}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.55}.topbar{height:72px;display:flex;align-items:center;justify-content:space-between;padding:0 clamp(20px,5vw,72px);border-bottom:1px solid var(--line);position:sticky;top:0;background:rgba(245,244,240,.9);backdrop-filter:blur(14px);z-index:20}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink);font-weight:700}.brand-mark{display:grid;place-items:center;background:var(--ink);color:#fff;width:42px;height:30px;border-radius:7px;font-size:10px;letter-spacing:.08em}.topbar nav{display:flex;gap:26px}.topbar nav a{color:var(--muted);text-decoration:none;font-size:14px}.topbar nav 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