.arch{background:var(--paper)}.arch a{color:var(--oxblood);text-decoration:none}.arch a:hover{text-underline-offset:2px;text-decoration:underline}.arch .arch-topbar{max-width:64rem;margin:0 auto;padding:24px 24px 0}.arch .arch-back{font-family:var(--font-mono);letter-spacing:.12em;text-transform:uppercase;color:var(--ink-soft);font-size:12px}.arch .arch-back:hover{color:var(--oxblood)}.arch .arch-hero{justify-content:space-between;align-items:flex-start;gap:32px;max-width:64rem;margin:0 auto;padding:44px 24px 0;display:flex;position:relative}.arch .arch-hero-copy{max-width:40rem}.arch .arch-eyebrow{font-family:var(--font-mono);letter-spacing:.16em;text-transform:uppercase;color:var(--oxblood);margin-bottom:16px;font-size:12px;display:block}.arch .arch-h1{font-family:var(--font-serif);letter-spacing:-.02em;text-wrap:balance;margin:0 0 16px;font-size:clamp(36px,6vw,60px);font-weight:700;line-height:1.04}.arch .arch-lede{color:var(--ink-soft);margin:0;font-size:clamp(16px,2vw,18.5px);line-height:1.6}.arch .arch-wave{flex:none;align-items:flex-end;gap:7px;height:110px;padding-top:10px;display:flex}.arch .arch-wave rect{fill:var(--oxblood);opacity:.85}@media (max-width:760px){.arch .arch-hero{flex-direction:column}.arch .arch-wave{display:none}}.arch .arch-legend{flex-wrap:wrap;gap:28px;max-width:64rem;margin:40px auto 0;padding:0 24px;display:flex}.arch .arch-legend-item{font-family:var(--font-mono);letter-spacing:.08em;text-transform:uppercase;color:var(--ink-soft);align-items:center;gap:9px;font-size:11.5px;display:inline-flex}.arch .arch-legend-dot{background:var(--ink);border-radius:50%;width:9px;height:9px}.arch .arch-legend-item--ext .arch-legend-dot{background:var(--oxblood)}.arch .arch-spine-wrap{max-width:64rem;margin:20px auto 0;padding:40px 24px 0;position:relative}.arch .arch-spine-line{background:var(--rule);width:2px;position:absolute;top:40px;bottom:90px;left:71px;overflow:hidden}.arch .arch-spine-flow{background:linear-gradient(to bottom, transparent 0%, var(--oxblood) 46%, var(--orb-glow,#d9585d) 50%, var(--oxblood) 54%, transparent 100%);animation:3.6s linear infinite arch-flow;position:absolute;inset:-60% 0}@keyframes arch-flow{0%{transform:translateY(-40%)}to{transform:translateY(40%)}}.arch .arch-node{padding:0 0 64px 96px;position:relative}.arch .arch-node:last-child{padding-bottom:8px}.arch .arch-node-marker{background:var(--paper);border:2px solid var(--ink);border-radius:50%;justify-content:center;align-items:center;width:32px;height:32px;transition:transform .3s,box-shadow .3s;display:flex;position:absolute;top:2px;left:32px}.arch .arch-node--ext .arch-node-marker{border-color:var(--oxblood)}.arch .arch-node-marker:after{content:"";border:1px solid var(--ink);opacity:0;border-radius:50%;animation:2.8s ease-out infinite arch-pulse;position:absolute;inset:-8px}.arch .arch-node--ext .arch-node-marker:after{border-color:var(--oxblood)}.arch .arch-node:nth-child(2) .arch-node-marker:after{animation-delay:.3s}.arch .arch-node:nth-child(3) .arch-node-marker:after{animation-delay:.6s}.arch .arch-node:nth-child(4) .arch-node-marker:after{animation-delay:.9s}.arch .arch-node:nth-child(5) .arch-node-marker:after{animation-delay:1.2s}.arch .arch-node:nth-child(6) .arch-node-marker:after{animation-delay:1.5s}@keyframes arch-pulse{0%{opacity:.5;transform:scale(.7)}to{opacity:0;transform:scale(1.7)}}.arch .arch-node-dot{background:var(--ink);border-radius:50%;width:6px;height:6px}.arch .arch-node--ext .arch-node-dot{background:var(--oxblood)}.arch .arch-node:hover .arch-node-marker{box-shadow:0 0 0 4px var(--oxblood-tint);transform:scale(1.12)}.arch .arch-node-head{flex-wrap:wrap;align-items:baseline;gap:18px;display:flex}.arch .arch-node-num{font-family:var(--font-serif);letter-spacing:-.02em;color:var(--rule);font-size:clamp(32px,4.5vw,46px);font-weight:700;line-height:1}.arch .arch-node--ext .arch-node-num{color:var(--oxblood-tint)}.arch .arch-node-titles{flex:auto;min-width:0}.arch .arch-node-tag{font-family:var(--font-mono);letter-spacing:.1em;color:var(--ink-soft);border:1px solid var(--rule);border-radius:3px;margin-bottom:8px;padding:3px 7px;font-size:10.5px;display:inline-block}.arch .arch-node--ext .arch-node-tag{color:var(--oxblood);border-color:var(--oxblood);background:var(--oxblood-tint)}.arch .arch-node-title{font-family:var(--font-serif);text-wrap:balance;margin:0;font-size:clamp(22px,3vw,27px);font-weight:600;line-height:1.15}.arch .arch-node-hook{color:var(--oxblood);margin-top:5px;font-size:15px;font-style:italic;font-weight:500;display:block}.arch .arch-node-desc{max-width:40rem;color:var(--ink-soft);margin:12px 0 0;font-size:15.5px;line-height:1.6}.arch .arch-node-desc code{font-family:var(--font-mono);background:var(--oxblood-tint);color:var(--oxblood-deep);border-radius:2px;padding:0 4px;font-size:.88em}.arch .arch-guardrails{max-width:64rem;margin:8px auto 0;padding:0 24px}.arch .arch-guardrails-card{border:1px solid var(--ink);background:var(--ink);color:var(--paper);border-radius:4px;flex-wrap:wrap;align-items:flex-start;gap:32px;padding:clamp(24px,4vw,38px);display:flex}.arch .arch-guardrails-label{font-family:var(--font-mono);letter-spacing:.14em;text-transform:uppercase;color:var(--orb-glow,#d9585d);flex:none;font-size:12px}.arch .arch-guardrails-title{font-family:var(--font-serif);color:var(--paper);margin:0 0 10px;font-size:clamp(20px,2.6vw,25px);font-weight:600}.arch .arch-guardrails-body{flex:320px;min-width:0}.arch .arch-guardrails-body p{color:#f5f1e8c7;margin:0;font-size:15px;line-height:1.6}.arch .arch-cta{border-top:1px solid var(--rule);flex-wrap:wrap;align-items:center;gap:20px 28px;max-width:64rem;margin:56px auto 0;padding:56px 24px 90px;display:flex}.arch .arch-cta-btn{background:var(--oxblood);color:var(--paper);border-radius:3px;padding:13px 22px;font-size:15px;font-weight:600;text-decoration:none;transition:background .2s;display:inline-block}.arch .arch-cta-btn:hover{background:var(--oxblood-deep);color:var(--paper);text-decoration:none}.arch .arch-cta-quiet{color:var(--ink);text-underline-offset:3px;text-decoration:underline;-webkit-text-decoration-color:var(--rule);text-decoration-color:var(--rule);font-size:15px}.arch .arch-cta-back{font-family:var(--font-mono);letter-spacing:.12em;text-transform:uppercase;color:var(--ink-soft);margin-left:auto;font-size:12px}.arch .arch-cta-back:hover{color:var(--oxblood)}.arch .reveal{opacity:0;transition:opacity .6s,transform .6s;transform:translateY(14px)}.arch .reveal.in{opacity:1;transform:none}@media (prefers-reduced-motion:reduce){.arch .arch-spine-flow,.arch .arch-node-marker:after,.arch .arch-node-marker,.arch .reveal{transition:none!important;animation:none!important}.arch .reveal{opacity:1;transform:none}}@media (max-width:620px){.arch .arch-spine-line{left:48px}.arch .arch-node{padding-left:66px}.arch .arch-node-marker{width:26px;height:26px;left:12px}.arch .arch-cta-back{margin-left:0}}