*{box-sizing:border-box;margin:0;padding:0}:root{--bg-primary: #fafafa;--bg-secondary: #fff;--bg-tertiary: #f5f5f5;--text-primary: #1a1a1a;--text-secondary: #555;--text-muted: #666;--text-hint: #888;--border-color: #e0e0e0;--border-input: #d0d0d0;--accent: #2563eb;--accent-hover: #1d4ed8;--tag-bg: #e8e8e8}[data-theme=dark]{--bg-primary: #1a1a1a;--bg-secondary: #242424;--bg-tertiary: #2f2f2f;--text-primary: #f0f0f0;--text-secondary: #b0b0b0;--text-muted: #909090;--text-hint: #707070;--border-color: #3a3a3a;--border-input: #4a4a4a;--accent: #5b9eff;--accent-hover: #3b82f6;--tag-bg: #3a3a3a}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;font-size:14px;color:var(--text-primary);background:var(--bg-primary)}.app{display:flex;flex-direction:column;height:100vh}.toolbar{display:flex;gap:8px;padding:12px 16px;background:var(--bg-secondary);border-bottom:1px solid 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