.idempotency-page{--experiment-gutter:clamp(1rem, 3vw, 3rem);--experiment-red:var(--red)}.idempotency-page>main:not(:has(.home)){width:100%;max-width:none;padding:0}.experiment-article{overflow:clip}.experiment-hero{width:min(100% - (2 * var(--experiment-gutter)), var(--content-width));min-height:calc(100svh - 8rem - 2px);padding-block:var(--space-3) var(--space-5);border:0;margin-inline:auto}body.idempotency-page>main .experiment-article>.experiment-hero{padding-bottom:calc(var(--space-5) - 1px);border-bottom:0}.scene-heading>span,.edge-number,.almost>span,.edge-intro>span,.final-takeaway>span,.next-experiment>span{font:var(--type-meta);letter-spacing:var(--tracking-meta);text-transform:uppercase}.experiment-hero__title{gap:var(--space-5);padding-block:clamp(3rem, 8vh, 7rem) var(--space-5);grid-template-columns:clamp(4rem,9vw,10rem) 1fr;align-items:start;margin-block:auto;display:grid}.experiment-hero__number{color:var(--experiment-red);font-family:var(--font-display);font-size:clamp(5rem,12vw,13rem);line-height:.75}.idempotency-page .experiment-hero h1{letter-spacing:-.025em;margin:0;font-size:clamp(6rem,15vw,16rem);line-height:.72}.experiment-hero__subject{padding-block:var(--space-3);border-block:var(--rule);font:var(--type-meta);letter-spacing:var(--tracking-meta);text-transform:uppercase}.experiment-hero__intro{gap:var(--space-6);max-width:68rem;margin:clamp(2rem, 4vw, 4rem) 0 var(--space-6) auto;grid-template-columns:.7fr 1.3fr;font-size:clamp(1.5rem,2.5vw,3rem);font-weight:350;line-height:1.03;display:grid}.experiment-hero__start{appearance:none;justify-content:space-between;gap:var(--space-4);width:min(100%,68rem);padding:var(--space-4);border:var(--rule);background:var(--ink);color:var(--paper);cursor:pointer;font:var(--type-meta);letter-spacing:var(--tracking-meta);text-transform:uppercase;margin-left:auto;text-decoration:none;transition:transform .14s,box-shadow .14s;display:flex}.idempotency-page .experiment-hero__start:hover{border-color:var(--ink);background:var(--ink);box-shadow:.4rem .4rem 0 var(--experiment-red);color:var(--paper);text-underline-offset:initial;transform:translate(-.2rem,-.2rem)}.payment-experiment{width:100%}.payment-experiment--dormant{height:0;overflow:hidden}.experiment-scene{scroll-margin-top:var(--space-4)}.experiment-scene--primary{width:min(100% - (2 * var(--experiment-gutter)), var(--content-width));border-top:var(--rule);grid-template-columns:minmax(18rem,.72fr) minmax(34rem,1.28fr);gap:clamp(2rem,5vw,7rem);margin-inline:auto;padding-block:clamp(4.5rem,9vw,10rem);display:grid}.scene-copy{align-self:start;max-width:34rem;scroll-margin-top:12px}.scene-heading{gap:var(--space-3);border-bottom:var(--rule);grid-template-columns:2.2rem 1fr;padding-block-end:var(--space-4);display:grid}.scene-heading h2{letter-spacing:-.015em;font-size:clamp(4.5rem,7.5vw,8.5rem)}.scene-copy>p:not(.term){max-width:31rem;margin-block-start:var(--space-4)}.scene-copy .scene-lead{margin-block-start:var(--space-6);font-size:clamp(1.45rem,2.1vw,2.4rem);line-height:1.08}.scene-actions{gap:var(--space-2);flex-wrap:wrap;margin-block-start:var(--space-5);display:flex}.experiment-action{border:1px solid var(--ink);min-height:3rem;padding:.85rem 1.15rem}.experiment-action:disabled{cursor:default;opacity:.55}.experiment-action--secondary{color:currentColor;background:0 0}.text-control{color:var(--muted);background:0 0;border-bottom:1px solid;margin-block-start:var(--space-3);padding:0}.scene-visual{align-self:start;min-width:0}.system{border:var(--rule);background-image:linear-gradient(color-mix(in srgb, var(--ink) 8%, transparent) 1px, transparent 1px), linear-gradient(90deg, color-mix(in srgb, var(--ink) 8%, transparent) 1px, transparent 1px);background-size:2rem 2rem;min-height:23rem;position:relative}.system__meta,.system__counters{justify-content:space-between;gap:var(--space-3);padding:var(--space-2) var(--space-3);background:var(--paper);font:var(--type-meta);letter-spacing:var(--tracking-meta);text-transform:uppercase;display:flex}.system__meta{border-bottom:var(--rule)}.system__counters{border-top:var(--rule)}.system__counters b{color:var(--experiment-red);font-weight:400}.status-alert{color:var(--experiment-red)}.system__actors{grid-template-columns:minmax(8rem,1fr) minmax(4.75rem,.5fr) minmax(8rem,1fr) minmax(9rem,.9fr) minmax(8rem,1fr);align-items:center;min-height:18.5rem;padding:clamp(1rem,3vw,3rem) clamp(1rem,2vw,2rem);display:grid}.actor{min-height:8.5rem;padding:var(--space-3);border:var(--rule);background:var(--paper);box-shadow:.45rem .45rem 0 var(--ink);flex-direction:column;justify-content:space-between;display:flex}.actor__label{font:var(--type-meta);letter-spacing:var(--tracking-meta);text-transform:uppercase}.actor strong{font-family:var(--font-display);font-size:clamp(2.2rem,3.5vw,4rem);font-weight:400;line-height:.9}.actor--long strong{font-size:clamp(1.8rem,2.7vw,3rem)}.actor--success strong{color:var(--experiment-red)}.actor--unknown{background:var(--experiment-red);color:var(--paper);box-shadow:.45rem .45rem 0 var(--ink)}.flow-link{align-content:center;align-self:stretch;min-width:0;display:grid;position:relative}.flow-link--provider{gap:.85rem}.route{width:100%;height:3rem;position:absolute;left:0}.route--customer-request{top:calc(50% - 1.5rem)}.route--provider-request{top:calc(50% - 3.65rem)}.route--response{top:calc(50% + .65rem)}.route__label{z-index:3;background:var(--paper);width:max-content;max-width:calc(100% - 1rem);font:var(--type-meta);text-align:center;text-transform:uppercase;padding-inline:.35rem;line-height:1.35;position:absolute;top:0;left:50%;transform:translate(-50%)}.route__track{height:1rem;display:block;position:absolute;bottom:.3rem;left:0;right:0}.route__track>i{border-top:var(--rule);position:absolute;top:50%;left:0;right:0}.route__track:after{clip-path:polygon(0 0,100% 50%,0 100%);content:"";background:currentColor;width:.52rem;height:.66rem;position:absolute;top:calc(50% + .5px);right:0;transform:translateY(-50%)}.route--response .route__track:after{clip-path:polygon(100% 0,0 50%,100% 100%);left:.45rem;right:auto}.packet{z-index:2;background:var(--experiment-red);color:var(--paper);font:var(--type-meta);padding:.15rem .25rem;font-style:normal;display:none;position:absolute;top:50%;left:.5rem;transform:translateY(-50%)}.route--response .packet{background:var(--ink);left:auto;right:.5rem}.system[data-phase=customer-sending] .route--customer-request .packet,.system[data-phase=provider-sending] .route--provider-request .packet,.system[data-phase=retry-sending] .route--provider-request .packet{animation:.7s cubic-bezier(.4,0,.2,1) both request-travel;display:block}.system[data-phase=response-returning] .route--response .packet,.system[data-phase=retry-response] .route--response .packet{animation:.8s cubic-bezier(.4,0,.2,1) both response-travel;display:block}.system[data-phase=charge-created] .route--response .packet,.system[data-phase=key-recognized] .route--response .packet{display:block}.system--failure[data-phase=response-returning] .route--response .packet,.system--idempotent[data-phase=response-returning] .route--response .packet{animation:.8s cubic-bezier(.4,0,.2,1) both response-lost}.system[data-phase=succeeded] .route--response .packet{display:block;left:.5rem;right:auto}.system[data-phase=response-lost] .route--response .packet,.system[data-phase=ambiguous] .route--response .packet{display:block;left:auto;right:44%}.route--response .response-marker--lost{background:var(--experiment-red)}@keyframes request-travel{0%{left:.5rem}to{left:calc(100% - 2.5rem)}}@keyframes response-travel{0%{right:.5rem}to{right:calc(100% - 2.5rem)}}@keyframes response-lost{0%{opacity:1;right:.5rem}72%{opacity:1;right:44%}to{opacity:1;right:44%}}.system__lost{z-index:5;background:var(--experiment-red);color:var(--paper);font-family:var(--font-display);white-space:nowrap;padding:.1em .16em;font-size:clamp(2.8rem,3.7vw,3.6rem);line-height:.88;position:absolute;inset:19% auto auto 50%;transform:translate(-50%,-50%)rotate(-2deg)}.result,.question-block,.duplicate-result,.key-record{padding:var(--space-5);border:var(--rule);margin-block-start:var(--space-4)}.result>p:first-child{font-family:var(--font-display);text-transform:uppercase;font-size:clamp(3rem,5vw,6rem);line-height:.9}.result>p:first-child span{color:var(--experiment-red)}.result dl{margin-block:var(--space-4);border-block:var(--rule);flex-wrap:wrap;display:flex}.result dl div{min-width:8rem;padding:var(--space-3);flex:1}.result dl div+div{border-left:var(--rule)}.result dt{font:var(--type-meta);text-transform:uppercase}.result dd{font-family:var(--font-display);font-size:3rem;line-height:1}.result small,.key-record small{max-width:40rem;display:block}.result .experiment-action{margin-block-start:var(--space-4)}.question-block__eyebrow,.request-slip,.telemetry,.key-record,.mismatch,.timeline,.race,.definition{font-family:var(--font-utility);font-size:clamp(.75rem,.9vw,.9rem)}.question-block h3{margin-block:var(--space-3) var(--space-4);font-size:clamp(3.8rem,6vw,7rem)}.choices{gap:var(--space-2);flex-wrap:wrap;display:flex}.choice{border:var(--rule);color:currentColor;background:0 0;flex:1;min-width:8rem}.choice--selected{background:var(--ink);color:var(--paper)}.choice--correct.choice--selected{background:var(--experiment-red)}.answer-note{color:var(--experiment-red);margin-block-start:var(--space-3)}.reveal{border-top:var(--rule);margin-block-start:var(--space-5);padding-block-start:var(--space-4)}.reveal>*+*{margin-block-start:var(--space-4)}.editorial-statement{color:var(--experiment-red);font-family:var(--font-display);text-transform:uppercase;font-size:clamp(4rem,7vw,8rem);line-height:.85}.contradiction{border:var(--rule);grid-template-columns:1fr 1fr;display:grid}.contradiction>div{gap:var(--space-4);min-height:10rem;padding:var(--space-4);display:grid}.contradiction>div+div{border-left:var(--rule)}.contradiction span{font:var(--type-meta);text-transform:uppercase}.contradiction strong{font-family:var(--font-display);text-transform:uppercase;align-self:end;font-size:clamp(2.5rem,4.5vw,5.5rem);font-weight:400;line-height:.9}.contradiction[data-outcome=gave-up]>div:first-child,.contradiction[data-outcome=duplicated]>div:last-child{background:var(--experiment-red);color:var(--paper)}.telemetry{padding:var(--space-3);background:var(--ink);color:var(--paper);white-space:nowrap;margin-block-start:var(--space-4);overflow:hidden}.charge-ledger{border-block:var(--rule);font:var(--type-meta);text-transform:uppercase;display:grid}.charge-ledger span{padding-block:var(--space-2);justify-content:space-between;display:flex}.charge-ledger span+span{border-top:var(--rule);background:color-mix(in srgb, var(--experiment-red) 10%, transparent);color:var(--experiment-red)}.duplicate-result>*+*{margin-block-start:var(--space-4)}.experiment-scene--inverse{width:100%;max-width:none;padding-inline:max(var(--experiment-gutter), calc((100vw - var(--content-width)) / 2));background:var(--ink);color:var(--paper)}.experiment-scene--inverse .scene-heading,.experiment-scene--inverse .system,.experiment-scene--inverse .system__meta,.experiment-scene--inverse .system__counters,.experiment-scene--inverse .result,.experiment-scene--inverse .request-slip{border-color:var(--paper)}.experiment-scene--inverse .system{background-image:linear-gradient(color-mix(in srgb, var(--paper) 12%, transparent) 1px, transparent 1px), linear-gradient(90deg, color-mix(in srgb, var(--paper) 12%, transparent) 1px, transparent 1px)}.experiment-scene--inverse .system__meta,.experiment-scene--inverse .system__counters,.experiment-scene--inverse .actor{background-color:var(--ink)}.experiment-scene--inverse .actor{box-shadow:.45rem .45rem 0 var(--paper)}.experiment-scene--inverse .route__label,.experiment-scene--inverse .response-fault{background:var(--ink)}.experiment-scene--inverse .experiment-action{border-color:var(--paper);background:var(--paper);color:var(--ink)}.term{margin-block:var(--space-5) var(--space-4);color:color-mix(in srgb, var(--paper) 70%, var(--experiment-red));font:var(--type-meta);letter-spacing:.08em;text-transform:uppercase}.request-slip{border:1px solid var(--paper);margin-block-start:var(--space-5)}.request-slip>span{padding:var(--space-3);border-bottom:1px solid var(--paper);text-transform:uppercase;display:block}.request-slip dl div{justify-content:space-between;gap:var(--space-3);padding:var(--space-2) var(--space-3);display:flex}.request-slip dt{color:#aaa}.request-slip dd{margin:0}.key-record{place-items:center;gap:var(--space-2);text-align:center;display:grid}.key-record>span{color:#aaa;text-transform:uppercase}.key-record strong{padding:var(--space-2);border:1px solid;font-weight:400}.key-record b{color:#d48c93}.convergence{align-items:center;gap:var(--space-2);margin:var(--space-4);padding:var(--space-4);font:var(--type-meta);text-align:center;border:1px solid;grid-template-columns:minmax(7rem,1fr) 2rem minmax(6rem,auto) auto minmax(7rem,auto) auto minmax(8rem,1fr);display:grid}.convergence__attempts{gap:var(--space-2);display:grid}.convergence__attempts span{padding:var(--space-2);border:1px solid}.convergence__join{border-block:1px solid;border-right:1px solid;height:3.4rem;display:block;position:relative}.convergence__join:after{content:"→";position:absolute;top:50%;right:-.45rem;transform:translateY(-50%)}.convergence strong,.convergence b{padding:var(--space-2);border:1px solid;font-weight:400}.convergence b{background:var(--paper);color:var(--ink)}.convergence__arrow{font-style:normal}.almost{scroll-margin-top:var(--space-4);padding:clamp(5rem, 10vw, 11rem) var(--experiment-gutter);background:var(--experiment-red);color:var(--paper);text-align:center}.almost h2{margin-block:var(--space-5);letter-spacing:-.02em;font-size:clamp(7rem,18vw,20rem);line-height:.72}.almost sup{vertical-align:top;font-size:.35em}.almost p{font-size:clamp(1.25rem,2vw,2.2rem)}.edge-intro{padding:clamp(4rem, 8vw, 8rem) var(--experiment-gutter);border-bottom:var(--rule)}.edge-intro h2{color:var(--experiment-red);margin-block-start:var(--space-5);font-size:clamp(5.5rem,13vw,15rem)}.edge-case{width:min(100% - (2 * var(--experiment-gutter)), var(--content-width));border-bottom:var(--rule);grid-template-columns:minmax(18rem,.7fr) minmax(28rem,1.3fr);gap:clamp(2rem,5vw,6rem);margin-inline:auto;padding-block:clamp(3.5rem,7vw,7rem);display:grid}.edge-case__copy h3{margin-block:var(--space-4);font-size:clamp(4rem,7vw,8rem)}.edge-case__copy>p{max-width:26rem;margin-block-end:var(--space-4);font-size:clamp(1.3rem,2vw,2rem);line-height:1.1}.edge-case--payload{padding-block:clamp(2.5rem,4vw,4.5rem)}.payload-setup{gap:var(--space-3);font-family:var(--font-editorial);margin-block-end:var(--space-4);font-size:clamp(1rem,1.25vw,1.2rem);line-height:1.25;display:grid}.payload-sequence{border:var(--rule);font-family:var(--font-utility);text-transform:uppercase;margin-block-end:var(--space-4);display:grid}.payload-sequence--mobile{display:none}.payload-visual{align-self:start;gap:var(--space-4);display:grid}.payload-visual .payload-sequence{margin-block-end:0}.payload-sequence__request{justify-content:space-between;gap:var(--space-3);padding:var(--space-3);display:flex}.payload-sequence__request strong{white-space:nowrap;font-weight:400}.payload-sequence__request strong i{font-style:normal}.payload-sequence__request--changed{border-top:var(--rule)}.payload-sequence__request--changed b{background:var(--experiment-red);color:var(--paper);padding-inline:.2em;font-weight:400}.payload-sequence__arrow{height:1.25rem;color:var(--experiment-red);text-align:center;font-style:normal;line-height:1.25rem}.payload-sequence__event{padding:var(--space-2);border-block:var(--rule);color:var(--experiment-red);text-align:center}.payload-question{text-wrap:balance}.mismatch{border:var(--rule);align-self:start}.mismatch>div{justify-content:space-between;gap:var(--space-3);padding:var(--space-4);display:flex}.mismatch>div+div{border-top:var(--rule)}.mismatch>div span{text-transform:uppercase}.mismatch__outcome>b{padding:var(--space-5);background:var(--experiment-red);color:var(--paper);font-family:var(--font-display);font-size:clamp(3rem,6vw,7rem);font-weight:400;line-height:.85;display:block}.mismatch__outcome>p,.mismatch__outcome>small{padding:var(--space-4);display:block}.mismatch__outcome>small{border-top:var(--rule);color:var(--muted)}.mismatch__outcome--selected{grid-template-rows:auto 1fr auto;min-height:15rem;display:grid}.mismatch__disclaimer{padding:var(--space-3) var(--space-4);border-top:var(--rule);color:var(--muted);display:block}.timeline{border-top:var(--rule)}.timeline>div{gap:var(--space-4);padding:var(--space-3);border-bottom:var(--rule);grid-template-columns:7rem 1fr 1fr;display:grid}.timeline time{color:var(--experiment-red)}.timeline b{text-align:right}.timeline .timeline__late{border:var(--rule);margin-block-start:var(--space-6)}.timeline__late p{max-width:44rem;font-family:var(--font-editorial);grid-column:2/-1;font-size:1.1rem}.race{border:var(--rule);min-height:28rem}.race__broken,.race__atomic{min-height:inherit}.race__requests{padding:var(--space-4) 0;border-bottom:var(--rule);text-align:center;text-transform:uppercase;grid-template-columns:1fr 1fr;align-items:center;gap:0;display:grid;position:relative}.race__requests strong{z-index:1;padding-inline:var(--space-2);background:var(--paper);position:absolute;left:50%;transform:translate(-50%)}.race__requests span:last-child{text-align:center}.race__idle{padding:var(--space-5);line-height:1.7}.race__split{grid-template-columns:1fr 1fr;height:2.5rem;display:grid}.race__split i{border-left:var(--rule);justify-self:center;width:0;position:relative}.race__split i:after{border-top:.42rem solid;content:"";border-inline:.28rem solid #0000;width:0;height:0;position:absolute;bottom:-.15rem;left:-.28rem}.workers{border-block:var(--rule);grid-template-columns:1fr 1fr;display:grid}.worker{min-height:12rem;padding:var(--space-4);text-align:center;text-transform:uppercase;align-content:start;display:grid}.worker+.worker{border-left:var(--rule)}.worker>*{padding:var(--space-2);border-bottom:1px solid color-mix(in srgb, currentColor 35%, transparent);animation:.18s ease-out both stage-reveal}.worker>strong{background:var(--ink);color:var(--paper);font-weight:400}.worker>b{color:var(--experiment-red);font-weight:400}.worker>em{background:color-mix(in srgb, var(--experiment-red) 12%, transparent);color:var(--experiment-red);font-style:normal}.race__observation{margin:var(--space-4);padding:var(--space-3);background:var(--experiment-red);color:var(--paper);text-align:center}.race__failure{padding:var(--space-5)}.race__failure>strong{margin-block:var(--space-4);color:var(--experiment-red);font-family:var(--font-display);text-align:center;font-size:clamp(7rem,15vw,17rem);font-weight:400;line-height:.75;display:block}.race__failure>p{font-family:var(--font-display);text-transform:uppercase;font-size:clamp(3rem,5vw,6rem);line-height:.85}.race__failure>small{max-width:40rem;margin-block-start:var(--space-4);display:block}.race__mobile-action{display:none}.state-machine{justify-content:center;gap:var(--space-2);padding:var(--space-5);text-align:center;display:grid}.atomic-requests{border-bottom:var(--rule);text-align:center;grid-template-columns:1fr 1fr;display:grid}.atomic-requests span{padding:var(--space-3)}.atomic-requests span+span{border-left:var(--rule)}.state-machine>*{animation:.18s ease-out both stage-reveal}.state-machine span,.state-machine b,.state-machine em{min-width:13rem;padding:var(--space-3);border:var(--rule);font-style:normal;font-weight:400}.state-machine i{color:var(--experiment-red);font-style:normal}.state-machine .is-active{background:var(--experiment-red);color:var(--paper)}.state-machine .is-success{background:var(--ink);color:var(--paper)}.race__fixed>p{max-width:42rem;margin:0 auto var(--space-4);padding-inline:var(--space-4);font-family:var(--font-editorial);font-size:1.1rem}@keyframes stage-reveal{0%{opacity:0;transform:translateY(.3rem)}to{opacity:1;transform:translateY(0)}}.final-takeaway{gap:var(--space-6);padding:clamp(5rem, 10vw, 11rem) var(--experiment-gutter);background:var(--ink);color:var(--paper);grid-template-columns:1.4fr .6fr;display:grid}.final-takeaway>span{padding-block:var(--space-2);border-block:1px solid var(--paper);grid-column:1/-1}.final-takeaway h2{letter-spacing:-.02em;font-size:clamp(7rem,16vw,18rem)}.final-takeaway__copy{align-self:end;max-width:32rem}.final-takeaway__copy>*+*{margin-block-start:var(--space-5)}.final-takeaway blockquote{margin-block:var(--space-6);padding-block:var(--space-5);border-block:1px solid var(--paper);text-align:center;grid-column:1/-1;font-size:clamp(2rem,4vw,5rem);line-height:1.05}.final-takeaway blockquote strong{color:#d48c93;font-weight:400}.definition{border:1px solid var(--paper);grid-column:1/-1;grid-template-columns:1fr 1fr;display:grid}.definition div{padding:var(--space-4)}.definition div+div{border-left:1px solid var(--paper)}.definition dt{color:#aaa;text-transform:uppercase;margin-block-end:var(--space-3)}.definition dd{font-family:var(--font-editorial);margin:0;font-size:clamp(1.25rem,2vw,2rem)}.text-control--inverse{color:var(--paper);grid-column:1/-1;justify-self:start}.experiment-related-note{gap:var(--space-2);padding-block:var(--space-4);color:inherit;border-block:1px solid;grid-column:1/-1;margin-block-start:var(--space-5);text-decoration:none;display:grid}.experiment-related-note span{color:#d48c93;font:var(--type-meta);letter-spacing:var(--tracking-meta)}.experiment-related-note strong{font-family:var(--font-editorial);font-size:clamp(1.3rem,2.2vw,2rem);font-weight:400;line-height:1.08}.next-experiment{padding:clamp(4rem, 7vw, 7rem) var(--experiment-gutter);background:color-mix(in srgb, var(--paper) 92%, var(--experiment-red))}.next-experiment p{max-width:40rem;margin-block:var(--space-5);font-size:clamp(1.3rem,2vw,2rem);line-height:1.1}.next-experiment h2{color:var(--muted);font-size:clamp(5rem,12vw,14rem)}.next-experiment a{color:inherit;text-decoration:none}@media (hover:hover){.experiment-related-note strong,.next-experiment h2{transition:color .12s}.experiment-related-note:hover strong,.next-experiment a:hover h2{color:#d48c93}}@media (width<=64rem){.experiment-scene--primary,.edge-case{gap:var(--space-6);grid-template-columns:1fr}.scene-copy{max-width:48rem}.scene-heading h2{font-size:clamp(4.5rem,12vw,8rem)}.payload-sequence--desktop{display:none}.payload-sequence--mobile{display:grid}.system__actors{min-height:17rem}}@media (width<=48rem){.experiment-action,.text-control,.experiment-hero__start{align-items:center;min-height:44px;font-size:.72rem}.text-control{padding:.75rem .25rem}.experiment-hero{min-height:auto;padding-block-end:var(--space-7)}.experiment-hero__title{gap:var(--space-3);padding-block:var(--space-5);grid-template-columns:1fr}.experiment-hero__number{font-size:5rem}.idempotency-page .experiment-hero h1{font-size:clamp(5.3rem,24vw,9rem)}.experiment-hero__intro{gap:var(--space-3);margin-block:var(--space-4);grid-template-columns:1fr;font-size:clamp(1.4rem,7vw,2.4rem)}.experiment-hero__start{display:grid}.experiment-scene--primary{padding-block:var(--space-7)}.scene-heading{grid-template-columns:1.8rem 1fr}.scene-heading h2{font-size:clamp(4rem,18vw,7rem)}.system{min-height:0}.system__meta{flex-wrap:wrap}.system__meta span:nth-child(2){display:none}.system__actors{padding:var(--space-4);grid-template-columns:1fr;gap:0}.actor{min-height:5.25rem;padding:var(--space-2) var(--space-3);box-shadow:.3rem .3rem 0 var(--ink)}.actor strong{font-size:clamp(2rem,10vw,2.8rem)}.actor--long strong{font-size:clamp(1.85rem,8vw,2.5rem)}.flow-link{grid-template-rows:minmax(0,1fr);align-content:stretch;min-height:4.75rem;display:grid}.flow-link--provider{grid-template-rows:minmax(0,1fr);grid-template-columns:1fr 1fr;min-height:6.5rem}.route,.route--customer-request,.route--provider-request,.route--response{align-self:stretch;width:100%;height:auto;min-height:100%;position:relative;top:auto;left:auto}.route__track{width:1.5rem;height:auto;inset:0 auto 0 50%;transform:translate(-50%)}.route__track>i{border-top:0;border-left:var(--rule);inset:0 auto 0 50%}.route__track:after{clip-path:polygon(0 0,100% 0,50% 100%);width:.7rem;height:.58rem;inset:auto auto 0 calc(50% + .5px);transform:translate(-50%)}.route--response .route__track:after{clip-path:polygon(50% 0,100% 100%,0 100%);inset:.3rem auto auto calc(50% + .5px);transform:translate(-50%)}.route__label{text-align:left;max-width:calc(50% - 1.5rem);font-size:.58rem;top:50%;left:calc(50% + 1rem);transform:translateY(-50%)}.flow-link--provider .route--provider-request .route__label{text-align:right;max-width:calc(50% - 1.25rem);left:auto;right:calc(50% + .9rem)}.packet,.route--response .packet{inset:0 auto auto 50%;transform:translate(-50%)}.route--response .packet{inset:auto auto 0 50%}.system[data-phase=customer-sending] .route--customer-request .packet,.system[data-phase=provider-sending] .route--provider-request .packet,.system[data-phase=retry-sending] .route--provider-request .packet{animation:.7s cubic-bezier(.4,0,.2,1) both request-travel-mobile}.system[data-phase=response-returning] .route--response .packet,.system[data-phase=retry-response] .route--response .packet{animation:.8s cubic-bezier(.4,0,.2,1) both response-travel-mobile}.system--failure[data-phase=response-returning] .route--response .packet,.system--idempotent[data-phase=response-returning] .route--response .packet{animation:.8s cubic-bezier(.4,0,.2,1) both response-lost-mobile}.system[data-phase=succeeded] .route--response .packet{inset:0 auto auto 50%}.system[data-phase=response-lost] .route--response .packet,.system[data-phase=ambiguous] .route--response .packet{inset:auto auto 58% 50%}.system__counters{gap:var(--space-1);display:grid}.system__counters span{justify-content:space-between;display:flex}.system__lost{max-width:72%;font-size:clamp(1.9rem,8vw,2.6rem);inset:65% auto auto 50%;transform:translate(-50%,-50%)rotate(-1deg)}.result,.question-block,.duplicate-result,.key-record{padding:var(--space-4)}.choices{gap:var(--space-2);display:grid}.choice{width:100%;min-height:44px;font-size:.72rem}.contradiction{grid-template-columns:1fr}.contradiction>div+div{border-top:var(--rule);border-left:0}.convergence{gap:var(--space-2);grid-template-columns:1fr}.convergence__join{border-bottom:1px solid;border-right:0;width:50%;height:1.75rem;margin-inline:auto}.convergence__join:after{inset:auto auto -.6rem 50%;transform:translate(-50%)rotate(90deg)}.convergence__arrow{transform:rotate(90deg)}.almost{padding-block:var(--space-8)}.almost h2{font-size:clamp(6rem,28vw,10rem)}.edge-intro h2{font-size:clamp(4.5rem,20vw,8rem)}.edge-case{padding-block:var(--space-7)}.mismatch__outcome--selected{min-height:clamp(19rem,38.5rem - 80vw,22.5rem)}.edge-case__copy h3{font-size:clamp(4rem,17vw,7rem)}.payload-setup{font-size:1.05rem;line-height:1.3}.payload-sequence__request{align-items:flex-start;gap:var(--space-1);flex-direction:column}.timeline>div{gap:var(--space-2);grid-template-columns:6rem 1fr}.timeline b{text-align:left;grid-column:2}.timeline__late p{grid-column:1/-1}.race__requests{padding:var(--space-3) 0;grid-template-columns:1fr 1fr;font-size:.66rem}.race__requests span:last-child{text-align:right}.worker{min-height:13rem;padding:var(--space-2);font-size:.64rem}.race__observation{margin:var(--space-2);font-size:.66rem}.race__desktop-action{display:none}.race__mobile-action{min-height:4.5rem;align-items:flex-start;margin-block-start:var(--space-4);animation:.18s ease-out both stage-reveal;display:flex}.atomic-requests,.state-machine{font-size:.68rem}.state-machine{padding:var(--space-4) var(--space-2)}.state-machine span,.state-machine b,.state-machine em{min-width:min(15rem,100%)}.final-takeaway{grid-template-columns:1fr}.final-takeaway h2{font-size:clamp(6rem,26vw,10rem)}.final-takeaway blockquote,.definition,.text-control--inverse{grid-column:1}.definition{grid-template-columns:1fr}.definition div+div{border-top:1px solid var(--paper);border-left:0}.next-experiment h2{font-size:clamp(4.5rem,19vw,8rem)}}@keyframes request-travel-mobile{0%{top:0}to{top:calc(100% - 1.4rem)}}@keyframes response-travel-mobile{0%{bottom:0}to{bottom:calc(100% - 1.4rem)}}@keyframes response-lost-mobile{0%{opacity:1;bottom:0}68%{opacity:1;bottom:58%}to{opacity:1;bottom:58%}}@media (prefers-reduced-motion:reduce){.packet{animation:none!important}.system[data-phase=customer-sending] .route--customer-request .packet,.system[data-phase=provider-sending] .route--provider-request .packet,.system[data-phase=retry-sending] .route--provider-request .packet{left:calc(100% - 2.5rem)}.system[data-phase=response-returning] .route--response .packet,.system[data-phase=retry-response] .route--response .packet{right:calc(100% - 2.5rem)}.system--failure[data-phase=response-returning] .route--response .packet,.system--idempotent[data-phase=response-returning] .route--response .packet{opacity:1;right:44%}.worker>*,.state-machine>*{animation:none}}@media (width<=48rem) and (prefers-reduced-motion:reduce){.system[data-phase=customer-sending] .route--customer-request .packet,.system[data-phase=provider-sending] .route--provider-request .packet,.system[data-phase=retry-sending] .route--provider-request .packet{top:calc(100% - 1.5rem);left:50%}.system[data-phase=response-returning] .route--response .packet,.system[data-phase=retry-response] .route--response .packet{bottom:calc(100% - 1.5rem);left:50%;right:auto}.system--failure[data-phase=response-returning] .route--response .packet,.system--idempotent[data-phase=response-returning] .route--response .packet{opacity:1;bottom:58%;left:50%;right:auto}}