:root{--bg: #fbfbf9;--fg: #14161c;--muted: #5d6270;--rule: #e4e4df;--link: #14161c}@media(prefers-color-scheme:dark){:root{--bg: #0b1220;--fg: #eef0ee;--muted: #9aa0ab;--rule: #222a38;--link: #eef0ee}.brand img{content:url(/rivie-wordmark.svg)}}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--fg);font-family:Instrument Sans,ui-sans-serif,-apple-system,Segoe UI,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased;line-height:1.65}.page{max-width:44rem;margin:0 auto;padding:28px 16px 64px}.brand{display:inline-block;margin-bottom:56px}.brand img{display:block;height:28px;width:auto}h1{margin:0;font-size:clamp(2rem,6vw,2.75rem);font-weight:600;letter-spacing:-.03em;line-height:1.1}.updated{margin:12px 0 40px;color:var(--muted);font-size:.9rem}h2{margin:44px 0 12px;padding-top:20px;border-top:1px solid var(--rule);font-size:1.2rem;font-weight:600;letter-spacing:-.01em}h3{margin:24px 0 6px;font-size:1rem;font-weight:600}p,li{font-size:1rem}ul{padding-left:1.25rem}li+li{margin-top:6px}a{color:var(--link);text-underline-offset:3px}.callout{margin:20px 0;padding:16px 18px;border:1px solid var(--rule);border-radius:10px}.callout p{margin:0}.caps{text-transform:uppercase;font-size:.9rem}footer{margin-top:64px;padding-top:20px;border-top:1px solid var(--rule);color:var(--muted);font-size:.85rem;display:flex;flex-wrap:wrap;gap:8px 20px}footer a{color:var(--muted)}