.arch{--arch-ink:var(--bg-deep,#1a0a0e);--arch-surface:var(--bg-tinted,#f7f5f3);--arch-accent:var(--accent,#b3012c);--arch-text:var(--text,#14141a);--arch-muted:var(--text-muted,#5a5a66);--arch-line:var(--hairline,#e8e6e2);--arch-display:var(--font-display,"Fraunces",Georgia,serif);--arch-body:var(--font-body,"Inter",-apple-system,sans-serif);font-family:var(--arch-body);margin:0 auto;max-width:1040px;padding:0 1.5rem}.arch-head{margin:0 auto 2.75rem;max-width:720px;text-align:center}.arch-eyebrow{color:var(--arch-accent);font-family:var(--arch-body);font-size:.72rem;font-weight:600;letter-spacing:.16em;margin:0 0 .75rem;text-transform:uppercase}.arch-title{color:var(--arch-text);font-family:var(--arch-display);font-size:clamp(1.7rem,3vw,2.4rem);font-weight:500;letter-spacing:-.02em;line-height:1.12;margin:0 0 1rem}.arch-lead{color:var(--arch-muted);font-size:1rem;line-height:1.6}.arch-lead p{margin:0}.arch-stage{align-items:stretch;display:flex;flex-direction:column;gap:0}.arch-band{background:#fff;border:1px solid var(--arch-line);border-radius:14px;padding:1.4rem 1.6rem}.arch-band-head{align-items:baseline;display:flex;flex-wrap:wrap;gap:.6rem;margin-bottom:.9rem}.arch-band-tag{color:var(--arch-text);font-family:var(--arch-display);font-size:1.05rem;font-weight:500}.arch-band-sub{color:var(--arch-muted);font-size:.78rem;letter-spacing:.1em;text-transform:uppercase}.arch-chips{display:flex;flex-wrap:wrap;gap:.5rem}.arch-chip{background:var(--arch-surface);border:1px solid var(--arch-line);border-radius:999px;color:var(--arch-text);font-size:.82rem;font-weight:500;padding:.32rem .8rem}.arch-band--frontline .arch-chip{background:#fff}.arch-interop{display:flex;justify-content:center;padding:.65rem 0;position:relative}.arch-interop-rail{background:linear-gradient(to bottom,var(--arch-line),var(--arch-accent),var(--arch-line));bottom:0;left:50%;margin-left:-1px;position:absolute;top:0;width:2px}.arch-interop-btn{align-items:center;background:#fff;border:1.5px solid var(--arch-accent);border-radius:999px;color:var(--arch-accent);cursor:pointer;display:inline-flex;font-family:var(--arch-body);font-size:.86rem;font-weight:600;gap:.6rem;padding:.55rem 1.1rem;position:relative;transition:background .15s,color .15s,box-shadow .15s}.arch-interop-btn.is-open,.arch-interop-btn:hover{background:var(--arch-accent);box-shadow:0 6px 20px rgba(179,1,44,.22);color:#fff}.arch-interop-arrows{font-size:1.05rem;line-height:1}.arch-toggle-icon{height:12px;position:relative;width:12px}.arch-toggle-icon:after,.arch-toggle-icon:before{background:currentColor;border-radius:1px;content:"";position:absolute}.arch-toggle-icon:before{height:2px;left:0;top:5px;width:12px}.arch-toggle-icon:after{height:12px;left:5px;top:0;transition:transform .18s;width:2px}.is-open .arch-toggle-icon:after{transform:rotate(90deg)}.arch-core{background:var(--arch-ink);border-radius:16px;box-shadow:0 18px 50px rgba(26,10,14,.18);color:#fff;padding:1.8rem 1.6rem}.arch-core-head{align-items:baseline;display:flex;flex-wrap:wrap;gap:.7rem;margin-bottom:1.25rem}.arch-core-tag{background:var(--arch-accent);border-radius:5px;color:#fff;font-family:var(--arch-body);font-size:.72rem;font-weight:700;letter-spacing:.16em;padding:.2rem .55rem;text-transform:uppercase}.arch-core-title{color:#fff;font-family:var(--arch-display);font-size:clamp(1.15rem,2vw,1.5rem);font-weight:500}.arch-pillars{display:grid;gap:.9rem;grid-template-columns:repeat(3,1fr)}.arch-pillar{background:hsla(0,0%,100%,.05);border:1px solid hsla(0,0%,100%,.14);border-radius:12px;color:#fff;cursor:pointer;display:flex;flex-direction:column;font-family:var(--arch-body);gap:.35rem;padding:1.1rem 1.1rem 1.15rem;text-align:left;transition:background .15s,border-color .15s,transform .12s}.arch-pillar:hover{background:hsla(0,0%,100%,.09);transform:translateY(-2px)}.arch-pillar.is-open{background:rgba(179,1,44,.16);border-color:var(--arch-accent)}.arch-pillar--accent{background:rgba(179,1,44,.14);border-color:rgba(224,86,111,.55)}.arch-pillar-name{font-family:var(--arch-display);font-size:1.12rem;font-weight:500}.arch-pillar-meta{color:#e0566f;font-size:.76rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase}.arch-pillar-hint{color:hsla(0,0%,100%,.66);font-size:.84rem;line-height:1.45;margin-top:.15rem}.arch-panels{margin-top:.5rem}.arch-panel{background:var(--arch-surface);border:1px solid var(--arch-line);border-left:3px solid var(--arch-accent);border-radius:12px;margin-top:.9rem;padding:1.5rem 1.6rem}.arch-panel h3{color:var(--arch-text);font-family:var(--arch-display);font-size:1.2rem;font-weight:500;margin:0 0 .6rem}.arch-panel p{color:var(--arch-text);font-size:.94rem;line-height:1.6;margin:0 0 .7rem}.arch-panel p:last-child{margin-bottom:0}.arch-panel strong{color:var(--arch-accent)}.arch-footnote{color:var(--arch-muted);font-size:.86rem;margin-top:2rem;text-align:center}.arch-footnote a{color:var(--arch-accent);font-weight:600;text-decoration:none}.arch-footnote a:hover{text-decoration:underline}@media (max-width:720px){.arch-pillars{grid-template-columns:1fr}.arch-band,.arch-core{padding:1.3rem 1.2rem}}