*,:before,:after{box-sizing:border-box;margin:0;padding:0}:root{--color-primary:#1a1a1a;--color-accent:#b8860b;--color-surface:#fff;--color-muted:#f5e6c8;--color-success:#2e7d32;--color-warning:#ed6c02;--color-danger:#c62828;--color-info:#0277bd;--color-bg:#f7f5f0;--color-border:#e1ded8;--color-text:#1a1a1a;--color-text-muted:#6b6b6b;--sidebar-width:240px;--topbar-height:64px;--radius-card:12px;--radius-sm:6px;--radius-md:8px;--shadow-card:0 1px 4px #00000014, 0 4px 16px #0000000f;--shadow-modal:0 8px 32px #0000002e;--font-body:Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--font-display:"Playfair Display", Georgia, serif;--transition:.15s 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var(--transition), color var(--transition);border-left:3px solid #0000;align-items:center;gap:10px;padding:10px 20px;font-size:13px;font-weight:500;display:flex}.sidebar-nav a:hover{color:#fff;background:#ffffff0f}.sidebar-nav a.active{color:var(--color-accent);border-left-color:var(--color-accent);background:#b8860b1a}.sidebar-nav .nav-icon{text-align:center;flex-shrink:0;width:18px;font-style:normal}.sidebar-footer{border-top:1px solid #ffffff1a;padding:16px 20px}.sidebar-user{color:#fff9;text-overflow:ellipsis;white-space:nowrap;margin-bottom:10px;font-size:12px;overflow:hidden}.sidebar-user strong{color:#fff;font-size:13px;font-weight:600;display:block}.main-content{margin-left:var(--sidebar-width);flex-direction:column;flex:1;min-height:100vh;display:flex}.topbar{height:var(--topbar-height);background:var(--color-surface);border-bottom:1px solid var(--color-border);z-index:50;justify-content:space-between;align-items:center;padding:0 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