:root{--bg-primary: #1a1a2e;--bg-secondary: #16213e;--bg-tertiary: #0f0f23;--text-primary: #eee;--text-secondary: #aaa;--text-muted: #666;--accent: #e94560;--accent-hover: #ff6b6b;--border: #333;--success: #4ade80;--warning: #fbbf24;--error: #ef4444;--tab-bg: #252545;--tab-active: #1a1a2e}*{box-sizing:border-box;margin:0;padding:0}html,body{height:100%;overflow:hidden}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg-primary);color:var(--text-primary)}#app{display:flex;height:100vh;width:100vw}#sidebar{width:280px;min-width:280px;background:var(--bg-secondary);display:flex;flex-direction:column;border-right:1px solid var(--border)}.sidebar-header{display:flex;justify-content:space-between;align-items:center;padding:16px;border-bottom:1px solid var(--border)}.sidebar-header h1{font-size:1.25rem;font-weight:600}.sidebar-header 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