:root{--bg:#f4f6f8;--surface:#fff;--soft:#f9fafb;--text:#17202a;--muted:#637083;--line:#d7dee8;--brand:#116a5c;--brand-dark:#0d544a;--accent:#b85c00;--danger:#b42318;--ok:#067647;--shadow:0 14px 34px #17202a14}*{box-sizing:border-box}body{min-height:100vh;color:var(--text);background:var(--bg);margin:0;font:14px/1.5 -apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}button,input,select,textarea{font:inherit}button:disabled,textarea:disabled{opacity:.6;cursor:not-allowed}.app-shell{grid-template-columns:256px minmax(0,1fr);min-height:100vh;display:grid}.sidebar{color:#fff;background:#17202a;padding:20px 14px}.brand{align-items:center;gap:12px;padding:4px 8px 24px;display:flex}.brand-mark{background:var(--brand);border-radius:8px;place-items:center;width:36px;height:36px;font-weight:750;display:grid}.brand h1{margin:0;font-size:18px;line-height:1.2}.brand p,.tool-head p{color:var(--muted);margin:3px 0 0}.brand 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