:root{--bg:#f4f4f0;--paper:#fff;--ink:#0a0a0a;--muted:#70706b;--line:#d9d9d3;--soft:#f8f8f5;--dark:#0a0a0a;--radius:14px;--shadow:0 22px 70px rgba(0,0,0,.08)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;letter-spacing:-.012em}button,input,select,textarea{font:inherit}button{cursor:pointer}a{color:inherit}.app-shell{max-width:1540px;min-height:100vh;margin:auto;background:var(--paper)}.topbar{height:72px;display:flex;align-items:center;justify-content:space-between;padding:0 30px;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:60;background:rgba(255,255,255,.94);backdrop-filter:blur(16px)}.brand{display:flex;align-items:center;gap:12px}.brand-mark{width:38px;height:38px;background:#000;color:#fff;display:grid;place-items:center;border-radius:10px;font:700 20px Georgia,serif}.brand-copy 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