.bottleneck-article{--btl-glass:color-mix(in oklab, var(--panel) 70%, transparent);--btl-line:color-mix(in oklab, var(--a2) 25%, var(--line));background:radial-gradient(circle at 82% 12%,color-mix(in oklab,var(--a5) 24%,transparent),transparent 34rem),radial-gradient(circle at 12% 42%,color-mix(in oklab,var(--a2) 16%,transparent),transparent 38rem),var(--bg)}.bottleneck-article main{z-index:1;position:relative}.btl-hero{max-width:1120px;padding:10rem var(--pad) 4rem;margin:0 auto}.btl-hero .kicker,.btl-label{color:var(--a2)}.btl-hero h1{letter-spacing:0;max-width:1040px;margin-top:1.3rem;font-size:clamp(3.3rem,8vw,7.5rem);line-height:.92}.btl-lead{max-width:800px;color:var(--ink);margin:2rem 0 0;font-size:clamp(1.2rem,2vw,1.7rem);line-height:1.55}.btl-intro{max-width:1120px;padding:1rem var(--pad) 5rem;grid-template-columns:1fr 1fr;gap:2rem;margin:0 auto;display:grid}.btl-intro p{color:var(--muted);margin:0;font-size:1.08rem;line-height:1.85}.btl-intro p:first-child{color:var(--ink);font-size:clamp(1.45rem,2.5vw,2rem);line-height:1.25}.btl-section{max-width:1120px;padding:5rem var(--pad);border-top:1px solid var(--line);margin:0 auto}.btl-copy{max-width:820px}.btl-copy h2{letter-spacing:0;margin-bottom:2rem;font-size:clamp(2.3rem,4.8vw,4.7rem);line-height:1}.btl-copy p{color:var(--muted);font-size:1.05rem;line-height:1.9}.btl-points{gap:.75rem;margin:2rem 0 0;padding:0;list-style:none;display:grid}.btl-points li{border:1px solid var(--btl-line);background:var(--btl-glass);color:var(--muted);border-radius:8px;grid-template-columns:2.4rem 1fr;gap:.8rem;padding:1.2rem;line-height:1.7;display:grid}.btl-points span{color:var(--a2);font:.74rem var(--font-mono)}.btl-visual{border:1px solid var(--btl-line);background:linear-gradient(135deg,var(--btl-glass),color-mix(in oklab,var(--a5) 10%,transparent));border-radius:8px;margin:3rem 0 0;padding:clamp(1.4rem,4vw,3.2rem);overflow:hidden}.btl-label{font:650 .72rem/1.4 var(--font-mono);letter-spacing:.16em;text-transform:uppercase;margin:0 0 2rem}.btl-caption{color:var(--muted);font:.78rem/1.7 var(--font-mono);margin:2rem 0 0}.btl-machine-row,.btl-chain,.btl-flow-grid{grid-template-columns:repeat(3,1fr);gap:.75rem;display:grid}.btl-machine-row>div,.btl-chain>div,.btl-flow-grid>div,.btl-equation>div{border:1px solid var(--line);background:color-mix(in oklab,var(--panel) 72%,transparent);border-radius:8px;min-height:8.5rem;padding:1rem}.btl-machine-row span,.btl-chain span,.btl-flow-grid span,.btl-equation span{color:var(--a2);font:.73rem var(--font-mono);display:block}.btl-machine-row strong,.btl-chain strong,.btl-flow-grid strong,.btl-equation strong{color:var(--ink);margin-top:1.6rem;font-size:clamp(1rem,1.8vw,1.35rem);display:block}.btl-machine-row small{color:var(--muted);margin-top:.65rem;display:block}.btl-machine-row .is-constraint,.btl-chain .is-constraint{border-color:var(--a6);box-shadow:inset 0 0 2rem color-mix(in oklab,var(--a6) 10%,transparent),0 0 1.6rem color-mix(in oklab,var(--a6) 15%,transparent)}.btl-result{color:var(--ink);border:1px solid var(--btl-line);border-radius:8px;align-items:center;gap:.8rem;margin-top:1rem;padding:1rem;display:flex}.btl-result i{background:var(--a6);width:2rem;height:.32rem;box-shadow:0 0 1rem var(--a6)}.btl-chain{grid-template-columns:repeat(4,1fr);align-items:center}.btl-chain>div{position:relative}.btl-chain>div:not(:last-child):after{content:"";background:var(--a2);width:.75rem;height:1px;box-shadow:0 0 .8rem var(--a2);position:absolute;top:50%;right:-.75rem}.btl-equation{grid-template-columns:1fr auto 1fr auto 1fr auto 1.2fr;align-items:stretch;gap:.65rem;display:grid}.btl-equation>b{color:var(--a2);align-self:center;font-size:1.6rem}.btl-equation .btl-equation-result{border-color:var(--a6);color:var(--ink);text-align:center;box-shadow:inset 0 0 2rem color-mix(in oklab,var(--a6) 10%,transparent);place-items:center;font-weight:700;display:grid}.btl-flow-grid{grid-template-columns:repeat(4,1fr)}.btl-flow-grid>div:nth-child(2),.btl-flow-grid>div:nth-child(3){border-color:color-mix(in oklab,var(--a5) 48%,var(--line))}.btl-signature{color:var(--ink);margin:0;font-weight:650}.btl-cta{max-width:1120px;padding:clamp(3rem,7vw,6rem) var(--pad);text-align:center;border-block:1px solid var(--btl-line);background:radial-gradient(circle at 50% 0,color-mix(in oklab,var(--a5) 20%,transparent),transparent 70%);margin:2rem auto 5rem}.btl-cta h2{letter-spacing:0;font-size:clamp(2.4rem,5.4vw,5.2rem);line-height:1}.btl-cta p{max-width:650px;color:var(--muted);margin:1.3rem auto 2rem}@media(max-width:900px){.btl-intro,.btl-machine-row,.btl-chain,.btl-flow-grid,.btl-equation{grid-template-columns:1fr}.btl-equation>b{text-align:center}.btl-chain>div:not(:last-child):after{width:1px;height:.75rem;inset:auto auto -.75rem 50%}}@media(max-width:700px){.btl-hero{padding-top:8.5rem}.btl-hero h1{font-size:clamp(3rem,15vw,4.8rem)}.btl-section{padding-block:3.8rem}}@media(prefers-reduced-motion:reduce){.bottleneck-article *{scroll-behavior:auto!important}}