:root{--bg: #f2f2f2;--surface: #ffffff;--border: #e5e5ea;--text: #1c1c1e;--text-secondary: #8e8e93;--accent: #007aff;--accent-purple: #5856d6;--cat-web: #ff3b30;--cat-mobile: #007aff;--cat-oss: #34c759;--cat-auto: #5856d6;--cat-newsletter: #ff9500;--cat-blog: #32ade6}*,*:before,*:after{box-sizing:border-box}html,body{margin:0;padding:0;min-height:100vh;font-family:-apple-system,BlinkMacSystemFont,SF Pro Text,Segoe UI,sans-serif;font-size:14px;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased}a,a:visited{color:var(--accent)}.app-shell{display:flex;flex-direction:column;height:100vh;overflow:hidden}.app-body{display:flex;flex:1;overflow:hidden}.title-bar{height:36px;background:var(--surface);border-bottom:1px solid var(--border);display:flex;align-items:center;padding:0 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