:root{--bg:#f6f7fb;--surface:#fff;--surface-2:#f1f3f9;--text:#1a1d29;--muted:#5b6078;--border:#e2e5ef;--accent:#2563eb;--accent-2:#1d4ed8;--success:#16a34a;--danger:#dc2626;--radius:14px;--shadow:0 10px 30px rgba(20,30,60,.08);--font:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;--mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}@media(prefers-color-scheme:dark){:root{--bg:#0f1117;--surface:#181b24;--surface-2:#202432;--text:#e7e9f2;--muted:#a0a5bc;--border:#2a2f3f;--accent:#4f8cff;--accent-2:#3b7bff;--shadow:0 10px 30px rgba(0,0,0,.4)}}*{box-sizing:border-box}html,body{margin:0;padding:0}body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.5;-webkit-font-smoothing:antialiased}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.container{max-width:1200px;margin:0 auto;padding:0 20px}.site-header{position:sticky;top:0;z-index:10;background:color-mix(in 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