:root{--bg: #ffffff;--text: #111827;--muted: #6b7280;--border: rgba(0, 0, 0, .12);--radius: 14px;--container: 1100px}html{scroll-behavior:smooth;scroll-padding-top:var(--header-offset)}body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;line-height:1.5}.container{max-width:var(--container);margin:0 auto;padding:0 20px}.section{padding:72px 0}h1,h2,h3{margin:0 0 12px;line-height:1.15}p{margin:0 0 12px;color:var(--muted)}@media(max-width:860px){:root{--header-offset: 88px}}