:root{--indigo:#1f3a5f;--indigo-l:#2f4f7e;--maroon:#7b2d26;--black:#1a1a1a;--bg:#fbfbfd;--line:#e4e7ee;--white:#fff;--muted:#6b7280}*{box-sizing:border-box}body,html{padding:0;margin:0;background:var(--bg);color:var(--black);font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif;font-size:15px;line-height:1.55}a{color:var(--indigo);text-decoration:none}a:hover{text-decoration:underline}h1,h2,h3,h4{color:var(--indigo);margin:0 0 .5rem;font-weight:700;line-height:1.25}p{margin:0 0 1rem}.container{max-width:1080px}.container,.container-narrow{margin:0 auto;padding:24px 20px}.container-narrow{max-width:640px}.topbar{position:-webkit-sticky;position:sticky;top:0;z-index:50;background:linear-gradient(135deg,var(--indigo) 0,var(--maroon) 100%);color:var(--white);border-bottom:3px solid var(--maroon)}.topbar-inner{max-width:1080px;margin:0 auto;padding:12px 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