:root{--bg:#f7f8fb;--card:#fff;--text:#111827;--muted:#6b7280;--line:#e5e7eb;--primary:#1f5eff;--primary2:#0f3cbd;--ok:#0f766e;--warn:#b45309}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif}a{color:inherit;text-decoration:none}.shell{min-height:100vh;display:flex}.sidebar{color:#fff;background:#111827;width:270px;height:100vh;padding:24px 18px;position:sticky;top:0}.brand{margin-bottom:6px;font-size:24px;font-weight:800}.tag{color:#cbd5e1;margin-bottom:24px;font-size:13px}.nav a{color:#e5e7eb;border-radius:10px;margin:4px 0;padding:11px 12px;display:block}.nav a:hover{background:#1f2937}.main{flex:1;max-width:1500px;padding:28px}.hero{color:#fff;background:linear-gradient(135deg,#1f5eff,#0f3cbd);border-radius:22px;margin-bottom:22px;padding:28px;box-shadow:0 12px 28px #1f5eff2e}.hero h1{margin:0 0 8px;font-size:34px}.hero 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