:root{--sidebar-bg:#1a1a2e;--content-bg:#f4f6fb;--surface:#ffffff;--text:#1f2430;--muted:#6b7280;--line:#e6e8ef;--accent:#4361ee;--success:#06d6a0;--warning:#ffd166;--danger:#ef476f;--radius-panel:8px;--radius-control:6px;--shadow-panel:0 1px 3px rgba(0,0,0,0.1);--ease:0.15s ease}*{box-sizing:border-box}body,html{margin:0;padding:0;font-family:Inter,Segoe UI,sans-serif;font-size:14px;line-height:1.45;background:var(--content-bg);color:var(--text)}a{color:inherit;text-decoration:none}h1,h2,h3,h4,h5,h6{margin:0;line-height:1.25}p{margin:0}.app-shell{min-height:100vh;display:grid;grid-template-columns:250px 1fr}.sidebar{background:var(--sidebar-bg);color:#ffffff;border-right:1px solid rgba(255,255,255,.08);padding:24px 14px;display:grid;align-content:start;grid-gap:18px;gap:18px}.brand{font-size:1.2rem;font-weight:700;letter-spacing:.03em;color:var(--accent);margin-bottom:22px}.nav{display:grid;grid-gap:6px;gap:6px}.nav a{display:block;border-left:3px solid 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