:root{--arch-surface:rgba(255,255,255,.82);--arch-line:rgba(51,83,132,.16);--arch-ink:#172a4a;--arch-muted:#63738c;--arch-blue:#2868d8;--arch-blue-soft:#eaf1ff;--arch-cyan:#e6f5f3;--arch-cyan-ink:#176c65;--arch-amber:#fff0d7;--arch-amber-ink:#835d16;--arch-violet:#f0eaff}
.architecture-page{background:linear-gradient(145deg,#f7f9fd 0%,#e8eef7 100%)!important;color:var(--arch-ink)}
.architecture-page main{padding-top:4.5rem}.architecture-shell{width:min(1180px,calc(100% - 4rem));margin:0 auto}.architecture-page section{padding:5.5rem 0}
.architecture-hero{position:relative;overflow:hidden;padding-top:7rem!important}.architecture-hero:before{position:absolute;inset:-12rem auto auto -12rem;width:38rem;height:38rem;border-radius:50%;background:radial-gradient(circle,rgba(40,104,216,.13),transparent 70%);content:"";pointer-events:none}.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;align-items:center;gap:4rem}.architecture-kicker{margin:0 0 1rem;color:var(--arch-blue);font-family:"Avenir Next",system-ui,sans-serif;font-size:.78rem;font-weight:800;letter-spacing:.14em}.back-link{display:inline-flex;gap:.55rem;align-items:center;margin-bottom:2.4rem;color:var(--arch-muted);font-size:.92rem;text-decoration:none}.back-link:hover{color:var(--arch-blue)}.architecture-hero h1{max-width:720px;margin:0;font-size:clamp(2.6rem,5.7vw,5.15rem);line-height:1.05;letter-spacing:-.055em}.architecture-hero h1 span{display:block;color:var(--arch-blue)}.architecture-lead{max-width:730px;margin:1.75rem 0 0;color:var(--arch-muted);font-size:clamp(1.02rem,1.7vw,1.24rem)}.proposal-note{display:flex;gap:.8rem;margin-top:2rem;padding:1rem 1.15rem;border-left:3px solid var(--arch-blue);background:rgba(255,255,255,.48);font-size:.9rem}.proposal-note span{color:var(--arch-muted)}.hero-visual{margin:0;overflow:hidden;border:1px solid var(--arch-line);border-radius:1.1rem;background:white;box-shadow:0 24px 70px rgba(31,51,79,.14);transform:rotate(1.2deg)}.hero-visual img{display:block;width:100%;aspect-ratio:3/2;object-fit:cover}.hero-visual figcaption{padding:.85rem 1.15rem;color:var(--arch-muted);font-size:.82rem}
.architecture-stage{border-block:1px solid var(--arch-line);background:rgba(255,255,255,.35)}.architecture-section-head{display:flex;align-items:end;justify-content:space-between;gap:2rem;margin-bottom:2.4rem}.architecture-section-head h2{margin:0;font-size:clamp(2rem,4vw,3.3rem);letter-spacing:-.04em}.architecture-section-head>p{max-width:380px;margin:0;color:var(--arch-muted)}.architecture-map{display:grid;gap:.7rem}.context-band{display:flex;align-items:center;justify-content:center;gap:1rem;min-height:4.5rem;padding:1rem 1.4rem;text-align:center;border:1px solid var(--arch-line);border-radius:.9rem;background:var(--arch-surface);box-shadow:0 12px 30px rgba(31,51,79,.06)}.context-band span{color:var(--arch-muted)}.flow-arrow{text-align:center;color:var(--arch-muted);font-size:1.2rem}.operating-model{display:grid;grid-template-columns:minmax(170px,.78fr) minmax(430px,2.4fr) minmax(170px,.78fr);gap:1rem}.control-plane{display:flex;flex-direction:column;justify-content:center;padding:1.5rem;border-radius:1rem}.control-plane p{margin:0 0 .35rem;font-family:"Avenir Next",system-ui,sans-serif;font-size:.7rem;font-weight:800;letter-spacing:.12em}.control-plane h3{margin:0;font-size:1.35rem}.control-plane span{margin-top:1rem;font-size:.86rem;line-height:1.8}.ontology{color:var(--arch-cyan-ink);background:var(--arch-cyan)}.governance{color:var(--arch-amber-ink);background:var(--arch-amber)}.layer-stack{display:grid;gap:.55rem}.architecture-layer{display:grid;grid-template-columns:3rem 1fr;align-items:center;gap:.8rem;width:100%;min-height:4.5rem;padding:.65rem 1rem;color:var(--arch-ink);font:inherit;text-align:left;border:1px solid var(--arch-line);border-radius:.75rem;background:var(--arch-surface);cursor:pointer;transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease}.architecture-layer:hover{transform:translateX(.25rem);border-color:rgba(40,104,216,.48)}.architecture-layer[aria-pressed="true"]{border-color:var(--arch-blue);box-shadow:0 0 0 3px rgba(40,104,216,.1)}.architecture-layer b{display:grid;place-items:center;width:2.5rem;height:2.5rem;color:#fff;border-radius:.6rem;background:var(--arch-blue);font-family:"Avenir Next",system-ui,sans-serif}.architecture-layer span{display:grid}.architecture-layer small{margin-top:.12rem;color:var(--arch-muted)}.observe{background:var(--arch-blue-soft);border-color:#cbdcff;box-shadow:none}.learn{background:var(--arch-violet);border-color:#ddcffd;box-shadow:none}.return-loop{margin:.15rem 0 0;color:var(--arch-muted);font-size:.85rem;text-align:center}
.layer-guide{scroll-margin-top:5rem}.layer-tabs{display:flex;flex-wrap:wrap;gap:.6rem;margin-bottom:1rem}.layer-tabs button{padding:.62rem 1rem;color:var(--arch-ink);font:inherit;border:1px solid var(--arch-line);border-radius:2rem;background:transparent;cursor:pointer}.layer-tabs button[aria-pressed="true"]{color:#fff;border-color:var(--arch-blue);background:var(--arch-blue)}.layer-detail{padding:clamp(1.5rem,4vw,3rem);border:1px solid var(--arch-line);border-radius:1.1rem;background:var(--arch-surface);box-shadow:0 20px 55px rgba(31,51,79,.09)}.detail-title{max-width:900px}.detail-title>p:first-child{margin:0 0 .5rem;color:var(--arch-blue);font-size:.8rem;font-weight:800;letter-spacing:.1em}.detail-title h3{margin:0;font-size:clamp(1.7rem,3vw,2.5rem)}.detail-title>p:last-child{color:var(--arch-muted)}.detail-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:2rem;margin-top:2rem}.detail-grid h4,.references h4{margin:0;font-size:.85rem;letter-spacing:.06em}.detail-grid ul{margin:.8rem 0 0;padding-left:1.2rem}.detail-grid li+li{margin-top:.55rem}.references{margin-top:2rem;padding-top:1.3rem;border-top:1px solid var(--arch-line)}.references>div{display:flex;flex-wrap:wrap;gap:.6rem 1.2rem;margin-top:.75rem}.references a{color:var(--arch-blue);font-size:.88rem}.architecture-page button:focus-visible,.architecture-page a:focus-visible{outline:3px solid rgba(40,104,216,.35);outline-offset:3px}
.diagram-credit{display:flex;justify-content:space-between;gap:1rem;margin:.65rem 0 0;padding:.65rem .85rem;color:var(--arch-muted);font-family:"Avenir Next",system-ui,sans-serif;font-size:.73rem;border-top:1px solid var(--arch-line)}.diagram-credit strong{color:var(--arch-ink);letter-spacing:.04em}.ip-notice{padding-top:0!important}.ip-card{position:relative;display:grid;grid-template-columns:minmax(220px,.7fr) minmax(0,1.65fr);gap:clamp(2.5rem,6vw,6rem);overflow:hidden;padding:clamp(2.2rem,4.5vw,4rem);color:#edf4ff;border:1px solid rgba(143,181,247,.22);border-radius:1.25rem;background:linear-gradient(135deg,#172d4e 0%,#10223d 72%);box-shadow:0 24px 70px rgba(31,51,79,.18)}.ip-card:before{position:absolute;inset:0 auto 0 0;width:4px;background:linear-gradient(#72a6ff,#66c4b8);content:""}.ip-heading{align-self:start}.ip-heading .architecture-kicker{margin-bottom:1.25rem;color:#8fb5f7;font-size:.72rem}.ip-heading h2{max-width:8em;margin:0;font-size:clamp(2rem,3.6vw,3rem);line-height:1.13;letter-spacing:-.045em}.ip-heading>p:last-child{max-width:16rem;margin:1.25rem 0 0;color:#aebed3;font-size:.93rem;line-height:1.8}.ip-body{max-width:760px}.ip-body>p{margin:0;color:#edf3fb;font-size:1rem;line-height:1.95}.ip-body>p+p{margin-top:1rem;color:#c4d0df}.citation-box{display:grid;gap:.65rem;margin:1.75rem 0;padding:1.15rem 1.25rem;border:1px solid rgba(255,255,255,.14);border-radius:.75rem;background:rgba(255,255,255,.055)}.citation-box span{color:#91a9c8;font-family:"Avenir Next",system-ui,sans-serif;font-size:.7rem;font-weight:800;letter-spacing:.11em;text-transform:uppercase}.citation-box code{color:#f5f8fc;font-family:"LXGW WenKai","Noto Serif SC",serif;font-size:.92rem;line-height:1.75;white-space:normal;overflow-wrap:anywhere}.ip-actions{display:flex;align-items:center;flex-wrap:wrap;gap:.75rem}.ip-actions button,.ip-actions a{display:inline-flex;align-items:center;gap:.55rem;min-height:2.75rem;padding:.7rem 1rem;color:#f7faff;font:600 .9rem/1 "LXGW WenKai","Noto Serif SC",serif;text-decoration:none;border:1px solid rgba(255,255,255,.24);border-radius:.6rem;background:rgba(255,255,255,.035);cursor:pointer;transition:border-color .2s ease,background .2s ease,transform .2s ease}.ip-actions button:hover,.ip-actions a:hover{transform:translateY(-1px);border-color:#8fb5f7;background:rgba(143,181,247,.12)}.ip-actions button:first-child{color:#132846;border-color:#dbe8ff;background:#edf4ff}.ip-actions button:first-child:hover{background:#fff}.copy-status{color:#9ed8cf;font-size:.82rem}.ip-boundary{margin:1.6rem 0 0!important;padding-top:1.1rem;color:#91a4bd!important;font-size:.78rem!important;line-height:1.75!important;border-top:1px solid rgba(255,255,255,.11)}
html.dark{--arch-surface:rgba(20,30,45,.9);--arch-line:rgba(147,175,213,.2);--arch-ink:#edf4ff;--arch-muted:#a9b9ce;--arch-blue:#75a7ff;--arch-blue-soft:#172b4b;--arch-cyan:#15312f;--arch-cyan-ink:#86d9d0;--arch-amber:#352a16;--arch-amber-ink:#edca7f;--arch-violet:#28213d}.dark .architecture-page{background:linear-gradient(145deg,#111a29,#17243b)!important}.dark .architecture-stage{background:rgba(8,16,28,.25)}.dark .hero-visual{background:#141e2d}.dark .proposal-note{background:rgba(20,30,45,.48)}
@media(max-width:900px){.hero-grid{grid-template-columns:1fr;gap:2.5rem}.hero-visual{max-width:680px;transform:none}.operating-model{grid-template-columns:1fr}.control-plane{min-height:auto}.detail-grid,.ip-card{grid-template-columns:1fr;gap:2rem}.ip-heading h2{max-width:none}.ip-heading>p:last-child{max-width:32rem}.ip-body{max-width:none}}
@media(max-width:768px){.architecture-shell{width:min(100% - 3rem,680px)}.architecture-page section{padding:4rem 0}.architecture-hero{padding-top:5.5rem!important}.architecture-section-head{align-items:start;flex-direction:column;gap:.8rem}.context-band{align-items:stretch;flex-direction:column;gap:.15rem}.proposal-note,.diagram-credit{flex-direction:column;gap:.25rem}.architecture-layer{grid-template-columns:2.65rem 1fr}.architecture-layer small{font-size:.78rem}}
@media(prefers-reduced-motion:reduce){.architecture-layer{transition:none}}