:root{--bg-primary:#0a0e1a;--bg-secondary:#0d1117;--bg-tertiary:#161b22;--bg-elevated:#21262d;--text-primary:#f0f6fc;--text-secondary:#8b949e;--text-muted:#6e7681;--accent-primary:#58a6ff;--accent-secondary:#1f6feb;--accent-glow:#58a6ff26;--border-color:#30363d;--border-light:#21262d;--code-bg:#0d1117;--success:#3fb950;--warning:#d29922;--error:#f85149;--sidebar-width:280px;--header-height:60px}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{background:var(--bg-primary);color:var(--text-primary);min-height:100vh;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;line-height:1.6}.header{height:var(--header-height);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--border-color);z-index:1000;background:#0a0e1acc;align-items:center;display:flex;position:fixed;top:0;left:0;right:0}.header-content{justify-content:space-between;align-items:center;width:100%;max-width:1400px;margin:0 auto;padding:0 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