:root{--bg:#f5f7fb;--surface:#fff;--surface2:#f9fbfd;--text:#172033;--muted:#728097;--line:#e5eaf1;--primary:#2e8b68;--primary-dark:#237154;--danger:#d9534f;--warning:#e6a23c;--shadow:0 10px 30px rgba(20,35,60,.06);--radius:16px}*{box-sizing:border-box}html,body{min-height:100%}body{margin:0;font-family:Inter,Arial,sans-serif;background:var(--bg);color:var(--text)}a{text-decoration:none}.app-shell{display:flex;min-height:100vh}.sidebar{width:260px;position:fixed;left:0;top:0;bottom:0;background:#fff;border-right:1px solid var(--line);display:flex;flex-direction:column;z-index:1040}.brand{padding:24px 22px 18px;border-bottom:1px solid var(--line)}.brand-logo{max-width:150px;max-height:50px}.brand-product{margin-top:10px;font-size:11px;letter-spacing:1.4px;color:var(--muted);font-weight:700}.side-nav{padding:16px 12px;overflow:auto;flex:1}.nav-caption{padding:18px 12px 7px;font-size:10px;font-weight:800;letter-spacing:1.4px;color:#a0aabd}.nav-item{display:flex;align-items:center;gap:12px;padding:11px 13px;margin:3px 0;border-radius:11px;color:#536176;font-weight:600;font-size:14px}.nav-item:hover{background:#f1f7f4;color:var(--primary-dark)}.nav-item.active{background:#eaf5f0;color:var(--primary-dark)}.nav-item i{font-size:18px}.sidebar-footer{padding:16px 18px;border-top:1px solid var(--line)}.sidebar-footer a{color:#7b8799;font-weight:600}.main-area{margin-left:260px;width:calc(100% - 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