:root{--ink:#262922;--muted:#777b6f;--paper:#f4f0e8;--panel:#faf8f2;--line:#d9d3c6;--moss:#586553;--clay:#a86f4c;--sand:#d8c6aa;--shadow:0 16px 45px rgba(54,48,39,.08);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--paper)}*{box-sizing:border-box}body{margin:0;background:radial-gradient(circle at 20% 5%,#fffaf0 0,transparent 34%),var(--paper)}button,textarea,input{font:inherit}.shell{min-height:100vh;display:grid;grid-template-columns:88px minmax(0,1fr) 340px;grid-template-rows:76px 1fr;grid-template-areas:"top top top" "rail workspace interaction"}.top{grid-area:top;display:flex;align-items:center;justify-content:space-between;padding:0 28px;border-bottom:1px solid var(--line);background:rgba(250,248,242,.88);backdrop-filter:blur(18px);position:sticky;top:0;z-index:5}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:inherit}.brand 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