:root{--bg:#f6f8fa;--panel:#ffffff;--panel-strong:#ffffff;--text:#1f2328;--muted:#656d76;--line:#d0d7de;--accent:#0969da;--accent-strong:#0550ae;--warm:#cf222e;--shadow:0 1px 2px rgba(31,35,40,0.04)}*{box-sizing:border-box}html{min-height:100%}body{margin:0;min-height:100vh;color:var(--text);background:var(--bg);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Helvetica,Arial,sans-serif,Apple Color Emoji,Segoe UI Emoji;font-size:14px;line-height:1.5}a{color:inherit;text-decoration:none}.shell{display:grid;grid-template-columns:280px minmax(0,1fr);min-height:100vh}.sidebar{display:flex;flex-direction:column;padding:24px 20px;border-right:1px solid var(--line);background:#ffffff}.brand{margin-bottom:24px}.brand-kicker,.muted-label,.page-eyebrow{margin:0 0 8px;color:var(--muted);text-transform:uppercase;letter-spacing:.08em;font-size:11px;font-weight:600}.brand 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