:root{--bg:#0b0c10;--paper:#0f1117;--ink:#e6e8ec;--muted:#a5adbd;--line:#1c212f;--accent:#8bd3ff;--container:1160px;--gutter:24px;--spotlight-w:440px;--spotlight-gap:24px;--header-h:56px}*{box-sizing:border-box}html,body{margin:0;padding:0}body{background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;font-family:ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Noto Sans,Ubuntu,Cantarell,Helvetica Neue,Helvetica,Arial;line-height:1.6}.site-header{z-index:20;-webkit-backdrop-filter:saturate(1.05)blur(8px);backdrop-filter:saturate(1.05)blur(8px);background:color-mix(in srgb,var(--bg)80%,transparent);border-bottom:1px solid var(--line);padding:12px 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