:root{--color-bg:#0b0d12;--color-bg-alt:#12151c;--color-text:#f5f6f8;--color-text-muted:#9aa2b1;--color-accent:#4f7dff;--color-border:#1f2430;--font-sans:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;--max-width:1120px}*{box-sizing:border-box;margin:0;padding:0}body,html{background:var(--color-bg);color:var(--color-text);font-family:var(--font-sans);line-height:1.5}a{color:inherit}section[id]{scroll-margin-top:72px}img{max-width:100%;display:block}