.ar-root{background:var(--linen)}.ar-hero{padding-top:var(--nav-h);border-bottom:1px solid var(--linen3)}.ar-hero-inner{max-width:1280px;margin:0 auto;padding:40px 80px 56px;display:grid;grid-template-columns:1fr 380px;gap:80px;align-items:center}.ar-eyebrow{font-family:var(--mono);font-size:.61rem;text-transform:uppercase;letter-spacing:.14em;color:var(--muted2);margin-bottom:20px}.ar-title{display:flex;flex-direction:column;line-height:.91;margin-bottom:22px}.ar-t-sans{font-family:var(--sans);font-size:clamp(3rem,5.5vw,5.6rem);font-weight:900;color:var(--ink);letter-spacing:-.045em}.ar-t-serif{font-family:var(--display);font-style:italic;font-weight:400;font-size:clamp(3rem,5.5vw,5.6rem);color:var(--terra);letter-spacing:-.03em}.ar-hero-sub{font-size:clamp(.93rem,1.15vw,1.05rem);color:var(--muted);line-height:1.78;max-width:480px;margin-bottom:24px}.ar-tools{display:flex;flex-wrap:wrap;gap:6px}.ar-tool-chip{font-family:var(--mono);font-size:.62rem;color:var(--muted2);background:var(--linen2);border:1px solid var(--linen3);padding:4px 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.ar-lm-stages{border-left-color:var(--amber)}.ar-lm-item[data-layer=ship] .ar-lm-stages{border-left-color:var(--ink3)}.ar-lm-stage{font-size:.78rem;color:var(--muted);line-height:1.5}.ar-body{display:grid;grid-template-columns:258px 1fr;max-width:1440px;margin:0 auto;align-items:start}.ar-rail{position:sticky;top:var(--nav-h);height:calc(100vh - var(--nav-h));overflow-y:auto;border-right:1px solid var(--linen3);padding:20px 0 40px;scrollbar-width:thin;scrollbar-color:var(--linen3) transparent}.ar-rail::-webkit-scrollbar{width:4px}.ar-rail::-webkit-scrollbar-thumb{background:var(--linen3);border-radius:2px}.ar-rail-group{margin-bottom:4px}.ar-rg-head{display:flex;align-items:center;justify-content:space-between;padding:12px 18px 5px}.ar-rg-label{font-family:var(--mono);font-size:.58rem;font-weight:700;text-transform:uppercase;letter-spacing:.16em}.ar-rail-group[data-layer=foundation] .ar-rg-label{color:var(--sage)}.ar-rail-group[data-layer=core-llm] .ar-rg-label{color:var(--terra)}.ar-rail-group[data-layer=production] .ar-rg-label{color:var(--amber)}.ar-rail-group[data-layer=ship] .ar-rg-label{color:var(--ink2)}.ar-rg-range{font-family:var(--mono);font-size:.55rem;color:var(--muted2);letter-spacing:.06em}.ar-rail-btn{display:flex;align-items:baseline;gap:10px;width:100%;text-align:left;padding:7px 18px;background:none;border:none;border-left:2px solid transparent;cursor:pointer;transition:background .12s,border-color .15s}.ar-rail-btn:hover,.ar-rail-btn.active{background:var(--linen2)}.ar-rail-group[data-layer=foundation] .ar-rail-btn.active{border-left-color:var(--sage)}.ar-rail-group[data-layer=core-llm] .ar-rail-btn.active{border-left-color:var(--terra)}.ar-rail-group[data-layer=production] .ar-rail-btn.active{border-left-color:var(--amber)}.ar-rail-group[data-layer=ship] .ar-rail-btn.active{border-left-color:var(--ink2)}.ar-rb-num{font-family:var(--mono);font-size:.59rem;color:var(--muted2);flex-shrink:0;letter-spacing:.06em}.ar-rb-title{font-size:.78rem;color:var(--muted);line-height:1.35;transition:color .12s}.ar-rail-btn:hover .ar-rb-title,.ar-rail-btn.active .ar-rb-title{color:var(--ink)}.ar-panel{padding:0 80px 80px 64px;min-height:calc(100vh - var(--nav-h))}.ar-empty{display:flex;align-items:center;justify-content:center;height:380px}.ar-empty[hidden]{display:none}.ar-empty-msg{font-family:var(--mono);font-size:.7rem;color:var(--muted2);letter-spacing:.07em}.ar-stage{padding-top:48px}.ar-st-head{margin-bottom:28px}.ar-st-badge{display:inline-block;font-family:var(--mono);font-size:.57rem;font-weight:700;text-transform:uppercase;letter-spacing:.14em;padding:3px 9px;border-radius:4px;margin-bottom:14px}.ar-st-badge[data-layer=foundation]{color:var(--sage);background:var(--sage-pale);border:1px solid rgba(74,107,80,.22)}.ar-st-badge[data-layer=core-llm]{color:var(--terra);background:var(--terra-pale);border:1px solid rgba(196,97,74,.22)}.ar-st-badge[data-layer=production]{color:var(--amber);background:var(--amber-pale);border:1px solid rgba(184,122,40,.22)}.ar-st-badge[data-layer=ship]{color:var(--ink2);background:var(--linen2);border:1px solid var(--linen3)}.ar-st-title-row{display:flex;align-items:baseline;gap:16px;margin-bottom:10px}.ar-st-num{font-family:var(--mono);font-size:.88rem;color:var(--muted2);letter-spacing:.06em;flex-shrink:0}.ar-st-name{font-family:var(--sans);font-size:clamp(1.3rem,2.2vw,1.75rem);font-weight:800;letter-spacing:-.033em;color:var(--ink);line-height:1.1;margin:0}.ar-st-intro{font-size:.89rem;color:var(--muted2);font-style:italic;line-height:1.72;max-width:600px;margin:0}.ar-points{border:1px solid var(--linen3);border-radius:10px;overflow:hidden;margin-bottom:24px}.ar-point{border-bottom:1px solid var(--linen3)}.ar-point:last-child{border-bottom:none}.ar-pt-row{display:grid;grid-template-columns:180px minmax(0,1fr)}.ar-pt-row--btn{grid-template-columns:180px minmax(0,1fr) 40px;cursor:pointer;user-select:none}.ar-pt-row:hover .ar-pt-term{background:var(--linen3)}.ar-pt-row:hover .ar-pt-desc{background:var(--linen2)}.ar-pt-term{padding:11px 14px;font-size:.79rem;font-weight:700;color:var(--ink);background:var(--linen2);border-right:1px solid var(--linen3);line-height:1.45;display:flex;align-items:center;transition:background .12s}.ar-pt-desc{padding:11px 16px;font-size:.79rem;color:var(--muted);line-height:1.55;background:var(--linen);display:flex;align-items:center;transition:background .12s}.ar-pt-chevron{display:flex;align-items:center;justify-content:center;background:var(--linen);color:var(--muted2);transition:color .14s,background .12s}.ar-pt-row:hover .ar-pt-chevron{color:var(--ink2);background:var(--linen2)}.ar-pt-chevron svg{transition:transform .28s cubic-bezier(.4,0,.2,1)}.ar-point--open .ar-pt-chevron svg{transform:rotate(180deg)}.ar-point--open .ar-pt-chevron{color:var(--muted2)}.ar-det{max-height:0;overflow:hidden;transition:max-height .42s cubic-bezier(.4,0,.2,1);background:var(--white)}.ar-point--open .ar-det{max-height:2400px}.ar-det-nav{display:flex;padding:0 20px;border-bottom:1px solid var(--linen3);overflow-x:auto;scrollbar-width:none}.ar-det-nav::-webkit-scrollbar{display:none}.ar-det-tab{font-family:var(--mono);font-size:.64rem;font-weight:500;letter-spacing:.05em;color:var(--muted2);background:none;border:none;border-bottom:2px solid transparent;padding:10px 16px;cursor:pointer;transition:color .14s,border-color .14s;margin-bottom:-1px;white-space:nowrap}.ar-det-tab:hover{color:var(--muted)}.ar-det-tab--on{color:var(--terra);border-bottom-color:var(--terra)}.ar-stage[data-layer=foundation] .ar-det-tab--on{color:var(--sage);border-bottom-color:var(--sage)}.ar-stage[data-layer=core-llm] .ar-det-tab--on{color:var(--terra);border-bottom-color:var(--terra)}.ar-stage[data-layer=production] .ar-det-tab--on{color:var(--amber);border-bottom-color:var(--amber)}.ar-stage[data-layer=ship] .ar-det-tab--on{color:var(--ink2);border-bottom-color:var(--ink2)}.ar-det-pane{display:none;padding:22px 24px}.ar-det-pane--on{display:block}.ar-overview{font-size:.875rem;color:var(--muted);line-height:1.85;max-width:680px;margin:0}.ar-code{border-radius:8px;overflow:hidden}.ar-code-bar{display:flex;align-items:center;justify-content:space-between;padding:8px 16px;background:#1c1c1e}.ar-code-lbl{font-family:var(--mono);font-size:.59rem;letter-spacing:.1em;text-transform:uppercase;color:var(--sage)}.ar-stage[data-layer=core-llm] .ar-code-lbl{color:#e07a68}.ar-stage[data-layer=production] .ar-code-lbl{color:var(--amber)}.ar-stage[data-layer=ship] 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rgba(184,122,40,.28);padding:2px 7px;border-radius:3px;flex-shrink:0}.ar-pit-issue{font-size:.81rem;font-weight:700;color:var(--ink);line-height:1.3}.ar-pit-ctx{font-size:.8rem;color:var(--muted);line-height:1.72;padding:10px 16px;margin:0}.ar-pit-fix{display:flex;align-items:flex-start;gap:10px;padding:9px 16px;background:var(--sage-pale);border-top:1px solid rgba(74,107,80,.16)}.ar-pit-fix-tag{font-family:var(--mono);font-size:.56rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--sage);background:#4a6b501a;border:1px solid rgba(74,107,80,.25);padding:2px 7px;border-radius:3px;flex-shrink:0;margin-top:2px}.ar-pit-fix-txt{font-size:.8rem;color:var(--ink2);line-height:1.65;font-style:italic}.ar-qa-list{display:flex;flex-direction:column;gap:8px}.ar-qa-item{border:1px solid var(--linen3);border-radius:8px;overflow:hidden}.ar-qa-q{display:flex;align-items:center;justify-content:space-between;gap:12px;width:100%;text-align:left;padding:12px 16px;background:var(--linen2);border:none;cursor:pointer;font-family:var(--sans);font-size:.81rem;font-weight:600;color:var(--ink);line-height:1.45;transition:background .12s}.ar-qa-q:hover{background:var(--linen3)}.ar-qa-q svg{flex-shrink:0;color:var(--muted2);transition:transform .22s ease}.ar-qa-item--open .ar-qa-q svg{transform:rotate(180deg)}.ar-qa-a{max-height:0;overflow:hidden;transition:max-height .32s cubic-bezier(.4,0,.2,1)}.ar-qa-item--open .ar-qa-a{max-height:800px}.ar-qa-a p{padding:14px 16px;font-size:.81rem;color:var(--muted);line-height:1.78;border-top:1px solid var(--linen3);background:var(--white);margin:0}.ar-insight{font-family:var(--display);font-style:italic;font-size:clamp(.9rem,1.05vw,1.02rem);color:var(--muted);line-height:1.7;border-left:2px solid var(--linen3);padding-left:16px;margin:0 0 40px}.ar-stage[data-layer=foundation] .ar-insight{border-left-color:var(--sage)}.ar-stage[data-layer=core-llm] .ar-insight{border-left-color:var(--terra)}.ar-stage[data-layer=production] .ar-insight{border-left-color:var(--amber)}.ar-stage[data-layer=ship] .ar-insight{border-left-color:var(--ink3)}@media(max-width:1100px){.ar-hero-inner,.ar-panel{padding-left:40px;padding-right:40px}}@media(max-width:900px){.ar-hero-inner{grid-template-columns:1fr;gap:40px;padding:48px 32px}.ar-hero-right{display:none}.ar-body{grid-template-columns:1fr}.ar-rail{position:static;height:auto;border-right:none;border-bottom:1px solid var(--linen3);overflow-y:visible}.ar-panel{padding:24px 32px 60px;min-height:auto}}@media(max-width:560px){.ar-t-sans,.ar-t-serif{font-size:clamp(2.4rem,10vw,3.2rem)}.ar-hero-inner{padding:36px 20px 44px}.ar-panel{padding:20px 20px 60px}.ar-pt-row{grid-template-columns:1fr}.ar-pt-row .ar-pt-term{border-right:none;border-bottom:1px solid var(--linen3)}.ar-pt-row--btn{grid-template-columns:1fr 36px}.ar-pt-row--btn .ar-pt-term{grid-column:1;border-right:none;border-bottom:1px solid var(--linen3)}.ar-det-pane{padding:16px}.ar-code-pre{padding:14px 16px;font-size:.72rem}}