*{margin:0;padding:0;box-sizing:border-box}html,body,#root{height:100%}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}:root{--bg-primary: #ffffff;--bg-secondary: #f7f8fa;--bg-card: #ffffff;--text-primary: #1a1a2e;--text-secondary: #6b7280;--border-color: #e8e8ec;--hover-bg: #f0f0f5;--accent: #1677ff}[data-theme=dark]{--bg-primary: #141414;--bg-secondary: #1f1f1f;--bg-card: #1f1f1f;--text-primary: #e4e4e7;--text-secondary: #8b8b9a;--border-color: #2e2e2e;--hover-bg: #2a2a2a;--accent: #4096ff}body{background:var(--bg-secondary);color:var(--text-primary);transition:background .2s,color .2s}.repo-card{border:1px solid var(--border-color);border-radius:8px;background:var(--bg-card);padding:16px 20px;transition:box-shadow .2s,border-color .2s;cursor:default}.repo-card:hover{box-shadow:0 1px 6px #0000000f}[data-theme=dark] .repo-card:hover{box-shadow:0 1px 6px 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8px}.sidebar-item:hover{background:var(--hover-bg)}.sidebar-item.active{background:var(--hover-bg);font-weight:500}.reader-layout{display:flex;flex-direction:column;height:100vh;background:var(--bg-primary)}.reader-header{display:flex;align-items:center;gap:12px;padding:0 16px;border-bottom:1px solid var(--border-color);background:var(--bg-card);flex-shrink:0;height:40px}.reader-home-link{font-size:15px;color:var(--text-secondary);transition:color .15s;display:flex;align-items:center}.reader-home-link:hover{color:var(--accent)}.reader-repo-name{font-size:13px;font-weight:600;color:var(--text-primary);font-family:SF Mono,Fira Code,Fira Mono,Menlo,monospace}.reader-file-path{font-size:12px;color:var(--text-secondary);font-family:SF Mono,Fira Code,Fira Mono,Menlo,monospace;padding:2px 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