:root{--rvg-night:#071319;--rvg-deep:#0b2029;--rvg-water:#143746;--rvg-blue:#8fd3e4;--rvg-blue-soft:#c1e6ec;--rvg-amber:#dfaa62;--rvg-lantern:#ffd18a;--rvg-cream:#f4ecdd;--rvg-paper:#e9dfcf;--rvg-ink:#172024;--rvg-muted:#667075;--rvg-clay:#b76750;--rvg-border:#8bc1cd47}html{scroll-behavior:smooth}body.river-guide-page{background:var(--rvg-night);color:var(--rvg-cream);margin:0}body.river-guide-page .site-header,body.river-guide-page>header,body.river-guide-page footer{z-index:30;position:relative}.rvg-guide{background:radial-gradient(circle at 72% 8%, #48879724, transparent 28rem), var(--rvg-night);overflow:clip}.rvg-skip{z-index:100;background:var(--rvg-cream);color:var(--rvg-night);letter-spacing:.08em;text-transform:uppercase;border-radius:999px;padding:.8rem 1rem;font:800 .8rem/1 sans-serif;transition:transform .18s;position:fixed;top:1rem;left:1rem;transform:translateY(-160%)}.rvg-skip:focus{transform:translateY(0)}.rvg-progress{z-index:90;background:#ffffff14;height:3px;position:fixed;top:0;left:0;right:0}.rvg-progress span{background:linear-gradient(90deg, var(--rvg-blue), var(--rvg-lantern));transform-origin:0;will-change:transform;width:100%;height:100%;display:block;transform:scaleX(0)}.rvg-hero{isolation:isolate;align-items:start;min-height:min(880px,100svh);display:grid;position:relative}.rvg-hero picture,.rvg-hero-image,.rvg-hero-shade{width:100%;height:100%;position:absolute;inset:0}.rvg-hero-image{object-fit:cover;object-position:center 48%}.rvg-hero-shade{z-index:1;background:linear-gradient(#020b0fad 0%,#020b0f1f 52%,#020b0f9e 100%),linear-gradient(90deg,#020b0fc2 0%,#020b0f1f 70%)}.rvg-hero-copy{z-index:2;width:min(90%,1280px);margin:0 auto;padding:clamp(4.5rem,9vh,7rem) 0 0;position:relative}.rvg-kicker{color:var(--rvg-blue);letter-spacing:.19em;text-transform:uppercase;margin:0;font:800 clamp(.72rem,1vw,.84rem)/1.2 sans-serif}.rvg-hero h1{letter-spacing:-.065em;text-wrap:balance;max-width:1200px;margin:0;font:500 clamp(4.2rem,7.4vw,7.4rem)/.84 Georgia,serif}.rvg-hero-subtitle{max-width:850px;color:var(--rvg-lantern);letter-spacing:-.02em;margin:1.2rem 0 0;font:650 clamp(1.2rem,2.3vw,2rem)/1.2 sans-serif}.rvg-hero-deck{color:#f4ecddd1;max-width:700px;margin:1.25rem 0 0;font:400 clamp(1.02rem,1.55vw,1.3rem)/1.55 Georgia,serif}.rvg-hero-caption{z-index:3;color:#f4ecdd99;text-align:right;max-width:32rem;margin:0;font:500 .76rem/1.45 sans-serif;position:absolute;bottom:1.2rem;right:2rem}.rvg-nav{z-index:60;border-block:1px solid var(--rvg-border);backdrop-filter:blur(18px);background:#071319eb;align-items:stretch;min-height:56px;display:flex;position:sticky;top:0}.rvg-nav a{color:#f4ecdda8;letter-spacing:.08em;text-transform:uppercase;font:750 .68rem/1 sans-serif;text-decoration:none}.rvg-nav-home{border-right:1px solid var(--rvg-border);flex:none;place-items:center;padding:0 1.4rem;display:grid;color:var(--rvg-blue)!important}.rvg-nav-scroll{scrollbar-width:none;flex:1;display:flex;overflow-x:auto}.rvg-nav-scroll::-webkit-scrollbar{display:none}.rvg-nav-scroll a{border-right:1px solid #8bc1cd1f;flex:1 0 auto;justify-content:center;align-items:center;gap:.5rem;padding:.5rem .75rem;transition:color .16s,background .16s;display:flex}.rvg-nav-scroll a span{color:#8fd3e48c;font-variant-numeric:tabular-nums}.rvg-nav-scroll a:hover,.rvg-nav-scroll a:focus-visible,.rvg-nav-scroll a[aria-current=true]{color:var(--rvg-cream);background:#8fd3e414}.rvg-paper{background:linear-gradient(90deg, #4c5d5c0e 1px, transparent 1px), linear-gradient(#4c5d5c0e 1px, transparent 1px), var(--rvg-paper);color:var(--rvg-ink);background-size:56px 56px}.rvg-opening{grid-template-columns:minmax(16rem,.72fr) minmax(22rem,1.28fr);gap:clamp(3rem,8vw,8rem);width:min(88%,1240px);margin:0 auto;padding:clamp(6rem,12vw,11rem) 0 clamp(5rem,9vw,8rem);display:grid}.rvg-opening h2,.rvg-epilogue h2,.rvg-sources h2,.rvg-next h2{letter-spacing:-.055em;text-wrap:balance;margin:.3rem 0 0;font:500 clamp(2.8rem,5.4vw,5.9rem)/.94 Georgia,serif}.rvg-opening-copy{max-width:760px}.rvg-opening-copy p,.rvg-main-copy p,.rvg-epilogue-copy p{margin:0 0 1.15em;font:400 clamp(1.1rem,1.7vw,1.32rem)/1.68 Georgia,serif}.rvg-dropcap:first-letter{float:left;color:var(--rvg-clay);margin:.04em .1em 0 0;font:600 4.9em/.74 Georgia,serif}.rvg-promise{border-left:4px solid var(--rvg-clay);background:#ffffff61;padding:1.4rem 1.5rem;margin-top:2rem!important;font-style:italic!important}.rvg-paper .rvg-kicker,.rvg-claim-key .rvg-kicker{color:#537988}.rvg-claim-key{width:min(88%,1240px);margin:0 auto;padding:0 0 clamp(5rem,8vw,8rem)}.rvg-claim-key details{border-block:1px solid #1720242e}.rvg-claim-key summary{cursor:pointer;justify-content:space-between;align-items:center;gap:2rem;padding:1.35rem 0;list-style:none;display:flex}.rvg-claim-key summary::-webkit-details-marker{display:none}.rvg-claim-key summary:focus-visible{outline-offset:7px;outline:3px solid #537988}.rvg-claim-key summary>span:first-child{max-width:780px}.rvg-claim-key h2{letter-spacing:-.035em;margin:.35rem 0 0;font:600 clamp(1.45rem,2.5vw,2.2rem)/1.05 Georgia,serif}.rvg-claim-key summary p:last-child,.rvg-sources header>p{max-width:38rem;color:var(--rvg-muted);margin:.7rem 0 0;font:500 1rem/1.62 sans-serif}.rvg-claim-key-symbol{color:#537988;border:1px solid #17202440;border-radius:50%;flex:0 0 44px;place-items:center;width:44px;height:44px;font:500 1.5rem/1 Georgia,serif;transition:transform .16s,background .16s,color .16s;display:grid}.rvg-claim-key details[open] .rvg-claim-key-symbol{background:var(--rvg-water);color:var(--rvg-cream);transform:rotate(45deg)}.rvg-claim-key dl{margin:0;padding:0 0 1.35rem}.rvg-claim-key dl div{border-top:1px solid #17202429;grid-template-columns:minmax(9rem,.54fr) 1fr;gap:1rem;padding:1.05rem 0;display:grid}.rvg-claim-key dt{letter-spacing:.06em;text-transform:uppercase;align-items:center;gap:.62rem;font:800 .74rem/1.3 sans-serif;display:flex}.rvg-claim-key dt span{background:var(--rvg-blue);border-radius:50%;width:9px;height:9px}.rvg-claim-key dd{color:var(--rvg-muted);margin:0;font:500 .92rem/1.55 sans-serif}[data-claim=lived-experience]{--rvg-claim-color:#dfaa62}[data-claim=psychological-evidence]{--rvg-claim-color:#6f9c9f}[data-claim=systems-analogy]{--rvg-claim-color:#8fbfa6}[data-claim=formal-model]{--rvg-claim-color:#8fb5d7}[data-claim=alignment-connection]{--rvg-claim-color:#bd9bd4}[data-claim=ethical-boundary]{--rvg-claim-color:#d67c6d}.rvg-claim-key dt span[data-claim]{background:var(--rvg-claim-color)}.rvg-chapters{background:var(--rvg-paper);color:var(--rvg-ink)}.rvg-chapter{border-top:1px solid #17202426;padding:clamp(5rem,10vw,10rem) 0}.rvg-chapter:nth-child(2n){background:#f2eada99}.rvg-chapter-header,.rvg-chapter-body{width:min(88%,1240px);margin-inline:auto}.rvg-chapter-header{grid-template-columns:.18fr 1fr;gap:clamp(2rem,5vw,5rem);margin-bottom:clamp(3rem,6vw,6rem);display:grid}.rvg-chapter-number{color:#14374640;font-variant-numeric:tabular-nums;margin:0;font:500 clamp(4rem,8vw,8.5rem)/.8 Georgia,serif}.rvg-chapter-meta{align-items:center;gap:1rem;margin-bottom:1rem;display:flex}.rvg-claim{border:1px solid color-mix(in srgb, var(--rvg-claim-color) 58%, transparent);color:color-mix(in srgb, var(--rvg-claim-color) 72%, #172024);letter-spacing:.07em;text-transform:uppercase;border-radius:999px;padding:.5rem .7rem;font:800 .64rem/1 sans-serif}.rvg-chapter h2{letter-spacing:-.06em;text-wrap:balance;max-width:1020px;margin:0;font:500 clamp(3.1rem,6.5vw,7rem)/.9 Georgia,serif}.rvg-question{color:#607077;max-width:850px;margin:1.5rem 0 0;font:650 clamp(1.05rem,1.75vw,1.38rem)/1.45 sans-serif}.rvg-story{grid-template-columns:minmax(15rem,.6fr) minmax(24rem,1.4fr);align-items:start;gap:clamp(3rem,7vw,7rem);display:grid}.rvg-scene{border-top:3px solid var(--rvg-amber);color:#33444b;margin:0;padding-top:1rem;font:italic 500 clamp(1.2rem,2vw,1.55rem)/1.5 Georgia,serif;position:sticky;top:90px}.rvg-main-copy{max-width:760px}.rvg-editorial,.rvg-diagram{width:min(100%,1180px);margin:clamp(3.5rem,7vw,7rem) auto}.rvg-editorial img{aspect-ratio:16/9;object-fit:cover;border-radius:clamp(18px,3vw,38px);width:100%;height:auto;display:block;box-shadow:0 30px 70px #0e181b2b}.rvg-editorial figcaption,.rvg-diagram figcaption{color:#687275;text-align:center;max-width:760px;margin:1rem auto 0;font:500 .9rem/1.55 sans-serif}.rvg-diagram-stage{background:radial-gradient(circle at 74% 14%,#dfaa6226,#0000 31%),linear-gradient(145deg,#102b36,#08181f);border:1px solid #8fd3e440;border-radius:clamp(18px,3vw,38px);overflow:hidden;box-shadow:0 30px 70px #0e181b33}.rvg-diagram svg{width:100%;height:auto;display:block}.rvg-diagram svg text{fill:var(--rvg-cream);letter-spacing:.05em;font:800 16px/1 sans-serif}.rvg-diagram .rvg-svg-label{fill:var(--rvg-blue-soft);letter-spacing:.1em;font-size:15px}.rvg-diagram .rvg-svg-note{fill:#f4ecddad;letter-spacing:.01em;font-size:13px;font-weight:600}.rvg-diagram .rvg-svg-footer{fill:var(--rvg-lantern);letter-spacing:.11em;font-size:12px}.rvg-water{fill:url(#river-view-water)}.rvg-current{fill:none;stroke:#8fd3e433;stroke-width:3px}.rvg-view-field{stroke-width:2px}.rvg-view-field-a{fill:#dfaa621a;stroke:#dfaa62b3}.rvg-view-field-b{fill:#8fd3e41a;stroke:#8fd3e4a6}.rvg-rock{fill:#a9785d}.rvg-branch{fill:none;stroke:#d1bc92;stroke-width:8px;stroke-linecap:round}.rvg-shared-lens{fill:#ffd18a24;stroke:var(--rvg-lantern);stroke-width:2px;stroke-dasharray:7 8}.rvg-boat path{fill:var(--rvg-clay)}.rvg-boat circle{fill:var(--rvg-lantern)}.rvg-value-path,.rvg-proxy-path,.rvg-expectation,.rvg-repair-arrow,.rvg-annotation-line{fill:none;stroke-linecap:round;stroke-linejoin:round}.rvg-value-path{stroke:var(--rvg-blue);stroke-width:7px}.rvg-proxy-path{stroke:var(--rvg-amber);stroke-width:7px;stroke-dasharray:13 9}.rvg-destination{fill:#8fd3e42e;stroke:var(--rvg-blue);stroke-width:3px}.rvg-proxy-destination{fill:#dfaa6229;stroke:var(--rvg-amber);stroke-width:3px}.rvg-gap{stroke:#d67c6da6;stroke-width:2px;stroke-dasharray:5 7}.rvg-checkpoints circle{fill:var(--rvg-lantern);stroke:var(--rvg-night);stroke-width:4px}.rvg-axis{stroke:#f4ecdd61;stroke-width:2px}.rvg-uncertainty-band{fill:#8fd3e41f;stroke:#8fd3e452}.rvg-expectation{stroke:var(--rvg-blue);stroke-width:4px}.rvg-evidence-events circle{fill:#416d69;stroke:var(--rvg-cream);stroke-width:2px}.rvg-evidence-events path{fill:none;stroke:var(--rvg-cream);stroke-width:3px;stroke-linecap:round}.rvg-evidence-events text{fill:#f4ecddba;letter-spacing:0;font-size:12px}.rvg-evidence-events .rvg-event-break circle{fill:var(--rvg-clay)}.rvg-annotation-line{stroke:var(--rvg-lantern);stroke-width:2px}.rvg-repair-node circle,.rvg-repair-node rect{fill:#8fd3e41a;stroke:#8fd3e485;stroke-width:2px}.rvg-repair-node text{font-size:13px}.rvg-repair-arrow{stroke:var(--rvg-amber);stroke-width:3px}.rvg-repair-center{fill:#dfaa6221;stroke:var(--rvg-lantern);stroke-width:2px;stroke-dasharray:7 7}.rvg-map-region rect{stroke-width:2px}.rvg-map-region text{font-size:14px}.rvg-map-region .rvg-region-action{fill:var(--rvg-lantern);letter-spacing:.08em;font-size:12px}.rvg-region-safe rect{fill:#8fd3e41a;stroke:#8fd3e47a}.rvg-region-shared rect{fill:#7baf941f;stroke:#7baf948c}.rvg-region-danger rect{fill:#b767502b;stroke:#d67c6dbf}.rvg-region-incompatible rect{fill:#dfaa621a;stroke:#dfaa627a}.rvg-decision-question rect,.rvg-decision-classify rect{fill:#8fd3e41a;stroke:#8fd3e485;stroke-width:2px}.rvg-decision-question text,.rvg-decision-classify text{font-size:15px}.rvg-decision-arrow{fill:none;stroke:var(--rvg-lantern);stroke-width:3px;stroke-linecap:round}.rvg-decision-trunk{fill:none;stroke:#8fd3e47a;stroke-width:2px;stroke-linecap:round;stroke-linejoin:round}.rvg-decision-no{stroke:#e28b77}.rvg-decision-branch{fill:var(--rvg-blue)!important;letter-spacing:.08em!important;font-size:13px!important}.rvg-branch-no{fill:#f09a84!important}.rvg-worked{background:#ffffff40;border-block:1px solid #17202433;grid-template-columns:.85fr 1.15fr;gap:2rem clamp(3rem,7vw,7rem);max-width:1000px;margin:clamp(3.5rem,7vw,7rem) auto;padding:clamp(1.8rem,4vw,3rem);display:grid}.rvg-worked h3{letter-spacing:-.035em;margin:.35rem 0 .7rem;font:600 clamp(1.8rem,3vw,2.8rem)/1.05 Georgia,serif}.rvg-worked header>p:last-child,.rvg-worked li,.rvg-worked-result{color:#526066;font:500 .98rem/1.6 sans-serif}.rvg-worked ol{margin:0;padding-left:1.35rem}.rvg-worked li{padding:.42rem 0 .42rem .6rem}.rvg-worked-result{border-top:1px solid #17202424;grid-column:1/-1;margin:0;padding-top:1.25rem}.rvg-worked-result strong{color:var(--rvg-clay);letter-spacing:.11em;text-transform:uppercase;margin-bottom:.35rem;font-size:.7rem;display:block}.rvg-takeaway{text-align:center;border:0;max-width:900px;margin:clamp(3rem,6vw,6rem) auto;padding:0}.rvg-takeaway span{color:#537988;letter-spacing:.13em;text-transform:uppercase;font:800 .72rem/1 sans-serif}.rvg-takeaway p{letter-spacing:-.045em;text-wrap:balance;margin:.8rem 0 0;font:500 clamp(2rem,4vw,4rem)/1.05 Georgia,serif}.rvg-disclosures{grid-template-columns:1fr 1fr;gap:1rem;max-width:1080px;margin:0 auto;display:grid}.rvg-disclosures>.rvg-predict,.rvg-disclosures>.rvg-depth{background:#ffffff52;border:1px solid #1720242e;border-radius:18px;align-self:start;overflow:hidden}.rvg-predict-prompt,.rvg-predict-answer summary,.rvg-depth summary{align-items:center;gap:1rem;min-height:92px;padding:1.2rem;display:flex}.rvg-predict-answer summary,.rvg-depth summary{cursor:pointer;list-style:none}.rvg-predict-answer summary::-webkit-details-marker{display:none}.rvg-depth summary::-webkit-details-marker{display:none}.rvg-predict-answer summary:focus-visible,.rvg-depth summary:focus-visible{outline:3px solid var(--rvg-blue);outline-offset:-4px}.rvg-summary-symbol{color:#537988;border:1px solid #1720243d;border-radius:50%;flex:0 0 46px;place-items:center;width:46px;height:46px;font:500 1.5rem/1 Georgia,serif;display:grid}.rvg-predict-prompt small,.rvg-depth summary small{color:#537988;letter-spacing:.1em;text-transform:uppercase;margin-bottom:.25rem;font:800 .66rem/1.2 sans-serif;display:block}.rvg-predict-prompt strong,.rvg-predict-answer summary strong,.rvg-depth summary strong{font:650 .98rem/1.3 sans-serif}.rvg-predict-prompt{align-items:flex-start;padding-bottom:1rem}.rvg-predict-prompt>span:last-child{padding-top:.1rem}.rvg-predict-prompt p{color:#526066;margin:0 0 .75rem;font:500 .92rem/1.58 sans-serif}.rvg-predict-answer{border-top:1px solid #17202421}.rvg-predict-answer summary{min-height:64px;padding-block:.72rem}.rvg-predict-answer .rvg-summary-symbol{flex-basis:36px;width:36px;height:36px;font-size:1.15rem}.rvg-predict-answer[open] .rvg-summary-symbol,.rvg-depth[open] .rvg-summary-symbol{background:var(--rvg-water);color:var(--rvg-cream);transform:rotate(45deg)}.rvg-predict-body,.rvg-depth-body{padding:0 1.4rem 1.5rem}.rvg-depth-body>p{color:#526066;font:500 .94rem/1.62 sans-serif}.rvg-predict-body dl,.rvg-terms{margin:1.25rem 0 0}.rvg-predict-body dl div,.rvg-terms div{border-top:1px solid #1720241f;padding:.85rem 0}.rvg-predict-body dt,.rvg-terms dt{color:var(--rvg-clay);letter-spacing:.09em;text-transform:uppercase;margin-bottom:.25rem;font:800 .65rem/1.2 sans-serif}.rvg-predict-body dd,.rvg-terms dd{color:#4d5b61;margin:0;font:500 .9rem/1.58 sans-serif}.rvg-depth-intro{color:var(--rvg-ink)!important;font-weight:700!important}.rvg-inline-sources strong{color:var(--rvg-clay);letter-spacing:.09em;text-transform:uppercase;margin-bottom:.35rem;font:800 .65rem/1.2 sans-serif;display:block}.rvg-inline-sources a{color:#315f70;text-underline-offset:.18em;text-decoration-color:#315f7059}.rvg-boundary{border-left:4px solid var(--rvg-clay);background:#b7675012;max-width:900px;margin:1.25rem auto 0;padding:1.2rem 1.4rem}.rvg-boundary strong{color:var(--rvg-clay);letter-spacing:.1em;text-transform:uppercase;font:800 .68rem/1.2 sans-serif;display:block}.rvg-boundary p{color:#526066;margin:.5rem 0 0;font:500 .92rem/1.6 sans-serif}.rvg-epilogue{grid-template-columns:.82fr 1.18fr;gap:clamp(3rem,8vw,8rem);width:min(88%,1240px);margin:0 auto;padding:clamp(7rem,12vw,12rem) 0;display:grid}.rvg-epilogue-copy blockquote{border-left:3px solid var(--rvg-lantern);color:var(--rvg-lantern);letter-spacing:-.04em;margin:clamp(2.5rem,5vw,5rem) 0 0;padding:0 0 0 1.8rem;font:500 clamp(2rem,4vw,4rem)/1.05 Georgia,serif}.rvg-sources{border-top:1px solid var(--rvg-border);background:#0a1b22;padding:clamp(6rem,10vw,10rem) max(6%,50% - 620px)}.rvg-sources>header{grid-template-columns:1fr .8fr;align-items:end;gap:clamp(2rem,7vw,7rem);display:grid}.rvg-sources ol{grid-template-columns:repeat(3,1fr);gap:0;margin:clamp(3rem,6vw,6rem) 0 0;padding:0;list-style:none;display:grid}.rvg-sources li{border-top:1px solid var(--rvg-border);border-right:1px solid var(--rvg-border);padding:1.4rem}.rvg-sources li:nth-child(3n){border-right:0}.rvg-sources a{color:var(--rvg-cream);text-decoration:none}.rvg-sources a strong{font:650 1rem/1.35 sans-serif;display:block}.rvg-sources a span,.rvg-sources li small{color:var(--rvg-blue);letter-spacing:.07em;text-transform:uppercase;margin-top:.4rem;font:750 .65rem/1.35 sans-serif;display:block}.rvg-sources li p{color:#f4ecdd9e;margin:.8rem 0 0;font:500 .84rem/1.55 sans-serif}.rvg-sources li small{color:#dfaa62bf}.rvg-next{background:var(--rvg-cream);color:var(--rvg-ink);padding:clamp(6rem,10vw,10rem) max(6%,50% - 620px)}.rvg-next .rvg-kicker{color:#537988}.rvg-next nav{border-block:1px solid #1720242e;grid-template-columns:repeat(3,1fr);margin-top:clamp(3rem,6vw,5rem);display:grid}.rvg-next a{min-height:170px;color:inherit;border-right:1px solid #1720242e;flex-direction:column;justify-content:space-between;padding:1.5rem;text-decoration:none;transition:background .16s,color .16s;display:flex}.rvg-next a:last-child{border-right:0}.rvg-next a:hover,.rvg-next a:focus-visible{background:var(--rvg-water);color:var(--rvg-cream)}.rvg-next a span{letter-spacing:.08em;text-transform:uppercase;font:750 .68rem/1.4 sans-serif}.rvg-next a strong{letter-spacing:-.035em;margin-top:2rem;font:500 clamp(1.45rem,2.5vw,2.3rem)/1.05 Georgia,serif}@media (width>=661px) and (width<=1280px){.rvg-nav-home{padding-inline:1rem}.rvg-nav-scroll a{letter-spacing:.055em;gap:0;padding-inline:.48rem;font-size:.6rem}.rvg-nav-scroll a span{display:none}}@media (width<=980px){.rvg-opening,.rvg-epilogue{grid-template-columns:1fr;gap:2.5rem}.rvg-story{grid-template-columns:1fr;gap:2rem}.rvg-scene{max-width:720px;position:static}.rvg-chapter-header{grid-template-columns:auto 1fr}.rvg-disclosures{grid-template-columns:1fr}.rvg-sources ol{grid-template-columns:repeat(2,1fr)}.rvg-sources li:nth-child(3n){border-right:1px solid var(--rvg-border)}.rvg-sources li:nth-child(2n){border-right:0}}@media (width<=660px){.rvg-hero{align-items:end;min-height:118svh}.rvg-hero-image{object-fit:contain;object-position:center top;background:var(--rvg-night)}.rvg-hero-shade{background:linear-gradient(#020b0f08 0%,#020b0f1f 43%,#020b0ff7 88%)}.rvg-hero-copy{width:88%;padding:0 0 4.8rem}.rvg-hero h1{font-size:clamp(3.7rem,19vw,5.6rem)}.rvg-hero-caption{display:none}.rvg-nav{min-height:50px}.rvg-nav-home{padding-inline:1rem}.rvg-nav-scroll{scroll-snap-type:x proximity;mask-image:linear-gradient(90deg,#0000 0,#000 16px calc(100% - 16px),#0000 100%)}.rvg-nav-scroll a{scroll-snap-align:start;flex:none;padding-inline:.82rem}.rvg-opening,.rvg-claim-key,.rvg-chapter-header,.rvg-chapter-body,.rvg-epilogue{width:90%}.rvg-opening h2,.rvg-epilogue h2,.rvg-sources h2,.rvg-next h2{font-size:clamp(2.5rem,12vw,4.2rem)}.rvg-claim-key dl div{grid-template-columns:1fr;gap:.45rem}.rvg-claim-key summary{align-items:flex-start;gap:1rem}.rvg-claim-key h2{font-size:clamp(1.45rem,7vw,2rem)}.rvg-claim-key summary p:last-child{font-size:.9rem}.rvg-claim-key-symbol{flex-basis:40px;width:40px;height:40px}.rvg-chapter{padding-block:5rem}.rvg-chapter-header{grid-template-columns:1fr;gap:1.2rem}.rvg-chapter-number{font-size:3.7rem}.rvg-chapter h2{font-size:clamp(3rem,15vw,4.8rem)}.rvg-chapter-meta{flex-direction:column;align-items:flex-start}.rvg-editorial img{aspect-ratio:4/5}.rvg-diagram{width:calc(100% + 2rem);margin-left:-1rem}.rvg-diagram svg,.rvg-diagram[data-river-diagram=compatibility-map] svg{min-width:0;transform:none}.rvg-diagram svg text{font-size:22px}.rvg-diagram .rvg-svg-label{font-size:21px}.rvg-diagram .rvg-svg-note{font-size:19px}.rvg-diagram .rvg-svg-footer,.rvg-map-region text{font-size:18px}.rvg-map-region .rvg-region-action{font-size:15px}.rvg-diagram[data-river-diagram=compatibility-map] .rvg-map-region text,.rvg-diagram[data-river-diagram=compatibility-map] .rvg-decision-question text,.rvg-diagram[data-river-diagram=compatibility-map] .rvg-decision-classify text{font-size:28px}.rvg-diagram[data-river-diagram=compatibility-map] .rvg-map-region .rvg-svg-note,.rvg-diagram[data-river-diagram=compatibility-map] .rvg-decision-classify .rvg-svg-note{font-size:24px}.rvg-diagram[data-river-diagram=compatibility-map] .rvg-map-region .rvg-region-action{font-size:23px}.rvg-diagram figcaption{width:82%}.rvg-worked{grid-template-columns:1fr;padding-inline:1.25rem}.rvg-worked-result{grid-column:auto}.rvg-predict-prompt,.rvg-depth summary{min-height:84px}.rvg-sources>header,.rvg-sources ol,.rvg-next nav{grid-template-columns:1fr}.rvg-sources li,.rvg-sources li:nth-child(2n),.rvg-sources li:nth-child(3n){border-right:0}.rvg-next a,.rvg-next a:last-child{border-bottom:1px solid #1720242e;border-right:0;min-height:140px}}@media (prefers-reduced-motion:no-preference){.rvg-motion-ready .rvg-editorial,.rvg-motion-ready .rvg-diagram,.rvg-motion-ready .rvg-worked,.rvg-motion-ready .rvg-takeaway{animation:linear both rvg-rise view();animation-range:entry 5% cover 28%}@keyframes rvg-rise{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.rvg-guide *,.rvg-guide :before,.rvg-guide :after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}