:root{--app-bg:#f4f7f9;--card-bg:#fff;--sidebar-bg:#fff;--text-primary:#2d3748;--text-secondary:#718096;--text-muted:#a0aec0;--primary-blue:#2563eb;--primary-hover:#1d4ed8;--primary-gradient:linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);--primary-light:#2563eb1a;--success:#38a169;--warning:#d69e2e;--danger:#e53e3e;--info:#3182ce;--border-color:#e2e8f0;--divider-color:#edf2f7;--shadow-xs:0 1px 2px #0000000d;--shadow-sm:0 2px 4px #0000000f;--shadow-card:0 4px 12px #0000000d;--shadow-md:0 6px 16px #00000014;--shadow-lg:0 12px 24px #0000001a;--shadow-sidebar:2px 0 12px #0000000a;--radius-sm:6px;--radius-md:10px;--radius-lg:16px;--radius-xl:24px;--radius-full:9999px;--sidebar-width:250px;--sidebar-collapsed-width:72px;--header-height:64px;--bottom-nav-height:64px;--content-max-width:1400px;--space-xs:4px;--space-sm:8px;--space-md:16px;--space-lg:24px;--space-xl:32px;--space-2xl:48px;--transition-fast:.15s ease;--transition-normal:.2s ease;--transition-slow:.3s ease;--z-dropdown:100;--z-sticky:200;--z-header:300;--z-sidebar:400;--z-modal:500;--z-tooltip:600;--z-toast:700}[data-theme=dark],.dark-theme{--app-bg:#0b0f14;--card-bg:#121821;--sidebar-bg:#0f1419;--text-primary:#e6eefb;--text-secondary:#9fb0c6;--text-muted:#6b7c93;--primary-blue:#3b82f6;--primary-hover:#60a5fa;--primary-light:#3b82f626;--border-color:#1f2a38;--divider-color:#1a2332;--shadow-xs:0 1px 2px #0003;--shadow-sm:0 2px 4px #00000040;--shadow-card:0 4px 12px #0000004d;--shadow-md:0 6px 16px #00000059;--shadow-lg:0 12px 24px #0006;--shadow-sidebar:2px 0 12px #0003}.card-elevated{background:var(--card-bg);border-radius:var(--radius-lg);box-shadow:var(--shadow-card);border:1px solid var(--border-color)}.btn-gradient{background:var(--primary-gradient);color:#fff;border-radius:var(--radius-md);cursor:pointer;transition:transform var(--transition-fast), box-shadow 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