:root{--background:#fdfdfd;--foreground:#1c1c1e;--primary:#2a7fc9;--primary-hover:#1b5e9c;--secondary:#3fa7d6;--accent:#ffe27a;--border:#e5e5ea;--card-bg:#fff}@media (prefers-color-scheme:dark){:root:not([data-theme]){--background:#111;--foreground:#f2f2f7;--primary:#3fa7d6;--primary-hover:#2a7fc9;--border:#2c2c2e;--card-bg:#1c1c1e}}:root[data-theme=dark]{--background:#111;--foreground:#f2f2f7;--primary:#3fa7d6;--primary-hover:#2a7fc9;--border:#2c2c2e;--card-bg:#1c1c1e}html,body{background-color:var(--background);max-width:100vw;color:var(--foreground);margin:0;padding:0;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.6;overflow-x:hidden}a{color:inherit;text-decoration:none;transition:color .2s}*{box-sizing:border-box}h1,h2,h3,h4{letter-spacing:-.02em;margin-top:1.5em;margin-bottom:.5em;font-weight:700}p{margin-bottom:1.2em;font-size:1.05rem}strong{color:var(--primary);font-weight:700}nav{background:var(--card-bg);border-bottom:1px solid 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