:root{--primary-color: #4f46e5;--primary-hover: #4338ca;--secondary-color: #64748b;--success-color: #10b981;--warning-color: #f59e0b;--danger-color: #ef4444;--bg-color: #ffffff;--bg-secondary: #f8fafc;--bg-sidebar: #1e293b;--bg-hover: #f1f5f9;--bg-card: #ffffff;--text-primary: #1e293b;--text-secondary: #64748b;--text-tertiary: #94a3b8;--text-sidebar: #e2e8f0;--text-sidebar-hover: #ffffff;--text-sidebar-active: #ffffff;--border-color: #e2e8f0;--border-radius: 8px;--border-radius-sm: 6px;--border-radius-md: 12px;--border-radius-lg: 16px;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow-md: 0 2px 8px rgba(0, 0, 0, .06);--shadow-lg: 0 4px 12px rgba(0, 0, 0, .08);--shadow-card: 0 2px 8px rgba(0, 0, 0, .06);--shadow-card-hover: 0 8px 24px rgba(0, 0, 0, .1);--sidebar-width: 240px;--header-height: 64px;--transition-fast: .15s ease;--transition-normal: .25s ease;--spacing-xs: 4px;--spacing-sm: 8px;--spacing-md: 16px;--spacing-lg: 20px;--spacing-xl: 24px;--spacing-2xl: 32px;--content-max-width: 1200px}:root[data-theme=dark],:root.dark-mode{--bg-color: #0f172a;--bg-secondary: #1e293b;--bg-hover: #334155;--bg-card: #1e293b;--text-primary: #f1f5f9;--text-secondary: #cbd5e1;--text-tertiary: #94a3b8;--border-color: #334155}:root[data-layout=compact]{--sidebar-width: 200px;--header-height: 56px;--border-radius: 6px;--transition-fast: .1s ease;--transition-normal: .2s ease}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;font-size:16px;line-height:1.6;color:var(--text-primary);background-color:var(--bg-secondary)}#app{display:flex;min-height:100vh}#sidebar{width:var(--sidebar-width);background-color:var(--bg-sidebar);color:var(--text-sidebar);position:fixed;left:0;top:0;bottom:0;z-index:100}#main-content{flex:1;margin-left:var(--sidebar-width);display:flex;flex-direction:column}#page-header{height:var(--header-height);background-color:var(--bg-color);border-bottom:1px solid 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