:root{color-scheme:light;--ink:#183047;--dim:#546779;--muted:#6e8190;--edge:#dbe5e9;--surface:#fff;--paper:#f5f8fa;--navy:#15283c;--accent:#087c6d;--mint:#86dcca;--shadow:0 16px 50px rgba(22,44,66,.065);font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);line-height:1.7;font-size:16px;-webkit-font-smoothing:antialiased}a{color:inherit}a:hover{text-decoration-color:var(--accent)}.wrap{width:min(1140px,calc(100% - 56px));margin-inline:auto}.skip-link{position:absolute;top:-100px;left:20px;background:#fff;padding:9px 15px;z-index:10}.skip-link:focus{top:10px}.site-header{background:var(--navy);color:white}.header-inner{min-height:88px;display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap}.brand{font-weight:800;letter-spacing:.10em;font-size:15px;text-decoration:none;display:flex;align-items:center;gap:14px;white-space:nowrap}.brand-light{color:var(--mint);font-weight:500}.brand-mark{display:flex;align-items:center;justify-content:space-around;width:37px;height:28px;position:relative}.brand-mark::before{content:"";position:absolute;height:2px;background:var(--mint);left:0;right:0;top:13px}.brand-mark i{width:8px;height:8px;border:2px solid var(--mint);background:var(--navy);border-radius:50%;z-index:1}.site-nav{display:flex;gap:6px;align-items:center;flex-wrap:wrap}.site-nav a{color:#c4d2da;text-decoration:none;font-size:13px;padding:8px 12px;border-radius:7px;font-weight:600}.site-nav a:hover,.site-nav a.active{color:white;background:rgba(255,255,255,.11)}.page-intro{padding:74px 0 62px;max-width:1140px}.eyebrow,.kicker{color:var(--accent);font-size:11px;font-weight:800;letter-spacing:.16em;text-transform:uppercase}.page-intro h1{font-size:clamp(38px,5.2vw,65px);line-height:1.15;letter-spacing:-.055em;font-weight:760;max-width:830px;margin:16px 0 22px}.page-intro h1 em{font-style:normal;color:var(--accent)}.page-intro p{font-size:19px;color:var(--dim);max-width:740px;line-height:1.65;margin:0}.page-content{padding-bottom:66px}.section{margin:0 0 32px;border:1px solid var(--edge);border-radius:13px;background:var(--surface);padding:44px 48px;box-shadow:var(--shadow)}.section-first{margin-top:-6px}.section h2{font-size:clamp(24px,3vw,31px);letter-spacing:-.035em;line-height:1.28;margin:8px 0 16px}.section h3{font-size:21px;letter-spacing:-.02em;line-height:1.28}.section p{color:var(--dim);margin:10px 0 16px}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:32px;margin-bottom:24px}.section-heading p{max-width:440px;margin:0}.cards{display:grid;gap:16px}.cards.three{grid-template-columns:repeat(3,minmax(0,1fr))}.cards.two{grid-template-columns:repeat(2,minmax(0,1fr))}.topic-card{display:block;text-decoration:none;color:var(--ink);background:#f8fafb;border:1px solid var(--edge);border-radius:10px;padding:24px;transition:transform .12s,border-color .12s}.topic-card:hover{transform:translateY(-2px);border-color:#7bbeb0}.topic-card h3{margin:16px 0 10px}.topic-card h3 span{color:var(--accent);float:right}.topic-card p{font-size:14px;line-height:1.65;margin:0 0 20px}.tag{font-size:10px;letter-spacing:.14em;font-weight:800;color:var(--accent)}.card-meta{font-size:12px;border-top:1px solid var(--edge);padding-top:15px;color:var(--dim)}.table-wrap{overflow-x:auto}table{width:100%;border-collapse:collapse;text-align:left;font-size:14px;margin:10px 0}td,th{padding:15px 16px;border-bottom:1px solid var(--edge);vertical-align:top}th{font-weight:700}thead th{background:#eef3f5;color:var(--ink);font-size:12px;letter-spacing:.02em}tbody th{min-width:138px}.note{font-size:13px;color:var(--muted)!important;margin-top:16px!important}.split{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(260px,0.85fr);gap:44px;align-items:start}.mini-panel{border:1px solid var(--edge);background:#f8fafb;border-radius:10px;padding:26px}.mini-panel h3{font-size:17px;margin:0 0 19px}.step{display:flex;gap:18px;border-bottom:1px solid var(--edge);padding:0 0 14px;margin-bottom:16px}.step:last-child{border:0;margin:0;padding:0}.step>span{font-size:12px;color:var(--accent);font-weight:800;letter-spacing:.09em}.step b{font-size:14px}.step p{font-size:13px;margin:3px 0 0}.text-link{color:var(--accent);text-decoration:none;font-weight:750}.text-link:hover{text-decoration:underline}.link-grid{display:grid;gap:10px;grid-template-columns:repeat(3,minmax(0,1fr));margin-top:18px}.link-grid a{display:flex;align-items:center;justify-content:space-between;gap:10px;text-decoration:none;background:#f7fafb;border:1px solid var(--edge);border-radius:8px;padding:16px 18px;font-size:13px;font-weight:650}.link-grid a:hover{border-color:var(--accent)}.link-grid a span{font-size:18px;color:var(--accent)}.spec-list dl{margin:0}.spec-list dl div{display:flex;justify-content:space-between;gap:14px;border-bottom:1px solid var(--edge);padding:9px 0;font-size:13px}.spec-list dl div:last-child{border-bottom:0}.spec-list dt{color:var(--muted)}.spec-list dd{margin:0;font-weight:750;text-align:right}.diagram{background:#f6f9fb;border:1px solid var(--edge);border-radius:11px;padding:26px;margin:25px 0}.diagram-title{color:var(--dim);font-size:12px;font-weight:750;text-transform:uppercase;letter-spacing:.08em}.bus-rail{display:flex;align-items:center;margin:38px 12px 15px}.bus-rail .line{flex:1;background:#088779;height:5px}.termination{padding:8px;background:var(--navy);border-radius:5px;color:#fff;font-size:12px;font-weight:700}.nodes{display:flex;justify-content:space-around;text-align:center;font-weight:700;color:var(--dim);font-size:12px}.nodes>div{display:flex;flex-direction:column;align-items:center}.node{height:26px;width:2px;background:#088779;margin-bottom:6px}.diagram-caption{font-size:12px!important;margin:22px 0 0!important}.frame-diagram{display:flex;gap:4px;margin:26px 0;flex-wrap:wrap}.frame-cell{flex:1;min-width:120px;padding:14px 11px;border-radius:6px;text-align:center}.frame-cell small{display:block;font-weight:750;font-size:10px;letter-spacing:.09em;margin-bottom:7px}.frame-cell strong{font-size:13px}.commander{background:#dff2ec;color:#126151}.responder{background:#e8eef8;color:#214f86}.check-list{color:var(--dim);font-size:14px;padding-left:22px;margin:0}.check-list li{padding:5px 0}.notice{background:#eef8f5;border-left:4px solid var(--accent);padding:22px 26px;border-radius:7px}.notice p{margin:6px 0 0}.site-footer{background:var(--navy);color:#c7d4dc;padding:45px 0 20px}.footer-grid{display:grid;grid-template-columns:1.3fr .8fr 1.2fr;gap:70px}.site-footer b{color:white;letter-spacing:.10em;font-size:13px}.site-footer span{color:var(--mint);font-size:12px;font-weight:750;text-transform:uppercase;letter-spacing:.09em}.site-footer p{font-size:13px;line-height:1.75;margin:10px 0}.site-footer a{text-decoration:none}.site-footer a:hover{text-decoration:underline}.footer-bottom{border-top:1px solid #34475a;margin-top:29px;padding-top:16px;font-size:12px;display:flex;justify-content:space-between;color:#aebec9}.footer-bottom span{letter-spacing:0;text-transform:none;color:#aebec9;font-size:12px;font-weight:400}@media(max-width:900px){.header-inner{justify-content:center;padding:16px 0}.site-nav{justify-content:center}.split{grid-template-columns:1fr;gap:21px}.cards.three{grid-template-columns:1fr}.section-heading{display:block}.section-heading p{max-width:none}.link-grid{grid-template-columns:1fr}.footer-grid{gap:30px}}@media(max-width:650px){.wrap{width:min(100% - 32px,1140px)}.page-intro{padding:50px 0 45px}.page-intro p{font-size:16px}.section{padding:25px 20px;margin-bottom:15px}.cards.two{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}.footer-bottom{display:block}.site-nav a{padding:5px 8px}.frame-cell{min-width:94px}}