/* vas.sh v3 · research: the /research index and its detail pages, on the inner-page system */

/* index */
.pf-jump{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:2rem}
.pf-jump a{display:inline-flex;align-items:center;gap:.55rem;min-height:44px;padding:0 1.1rem;border-radius:999px;border:1px solid var(--ink);font:600 .9rem/1 var(--f-sans);text-decoration:none;transition:background .3s,color .3s}
.pf-jump a span{font:500 .68rem/1 var(--f-mono);color:var(--slate)}
.pf-jump a:hover{background:var(--ink);color:#fff}
.pf-jump a:hover span{color:var(--lime)}
.section[id]{scroll-margin-top:5.5rem}

.pf-grid{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.pf-grid>li{display:flex}
@media (max-width:1000px){.pf-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:640px){.pf-grid{grid-template-columns:minmax(0,1fr)}}
.pf-card{position:relative;display:flex;flex-direction:column;gap:.75rem;width:100%;min-height:44px;padding:1.4rem;border-radius:22px;background:var(--white);border:1px solid var(--rule);color:var(--ink);text-decoration:none;transition:transform .5s var(--ease),box-shadow .5s var(--ease),border-color .3s}
a.pf-card:hover{transform:translateY(-4px);box-shadow:0 30px 56px -34px rgba(21,22,19,.35);border-color:var(--rule-2)}
a.pf-card:focus-visible{outline:3px solid var(--ink);outline-offset:3px}
.pf-card.is-static{background:transparent;border-style:dashed}
.pf-top{display:flex;justify-content:space-between;align-items:center;gap:.5rem}
.pf-when{font:500 .64rem/1.3 var(--f-mono);letter-spacing:.1em;text-transform:uppercase;color:var(--slate)}
.pf-card h3{margin:0;font-size:1.2rem;line-height:1.2;font-weight:700;font-stretch:108%;letter-spacing:-.02em}
a.pf-card:not(.has-stat):hover h3{background:linear-gradient(var(--lime),var(--lime)) no-repeat 0 88%/100% 30%}
.pf-sum{margin:0;color:var(--ink-2);font-size:.95rem;line-height:1.5}
.pf-note{margin:0;color:var(--slate);font-size:.88rem;line-height:1.45}
.pf-role{margin:0;font:500 .7rem/1.4 var(--f-mono);color:var(--slate)}
.pf-stat{display:grid;justify-items:start;gap:.45rem;margin:.5rem 0 .2rem}
.pf-stat b{font:650 clamp(1.9rem,3.2vw,2.5rem)/1 var(--f-mono);letter-spacing:-.03em;font-variant-numeric:tabular-nums;background:linear-gradient(transparent 62%,var(--lime) 62% 94%,transparent 94%) no-repeat 0 0/0% 100%;transition:background-size .7s var(--ease)}
.pf-stat span{font:500 .68rem/1.35 var(--f-mono);letter-spacing:.04em;text-transform:uppercase;color:var(--slate)}
a.pf-card:hover .pf-stat b,a.pf-card:focus-visible .pf-stat b{background-size:100% 100%}
.pf-go{margin-top:auto;padding-top:.4rem;font-weight:600;font-size:.9rem}
.pf-go span{display:inline-block;transition:transform .45s var(--ease)}
a.pf-card:hover .pf-go span{transform:translateX(4px)}

/* status pills: graphite and lime only */
.pill.pf-open{border-color:var(--ink);color:var(--ink)}
.pill.pf-paused{border-style:dashed}

.pf-related{padding-top:0}
.pf-related-title{font-size:1.1rem;font-weight:700;margin:0 0 .8rem}
.pf-related ul{list-style:none;margin:0;padding:0;border-top:1px solid var(--rule)}
.pf-related a{display:flex;align-items:center;min-height:44px;padding:.6rem .2rem;border-bottom:1px solid var(--rule);font-weight:600;text-decoration:none;gap:.4rem}
.pf-related a:hover{text-decoration:underline;text-decoration-color:var(--lime-deep);text-decoration-thickness:2px}

.pf-pager{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:clamp(3rem,6vw,4.5rem)}
.pf-pager a{display:flex;flex-direction:column;gap:.4rem;min-height:44px;padding:1rem 1.1rem;border-radius:18px;border:1px solid var(--rule);background:var(--white);font-weight:650;line-height:1.3;text-decoration:none;transition:border-color .3s,transform .45s var(--ease)}
.pf-pager a:hover{border-color:var(--ink);transform:translateY(-2px)}
.pf-pager a span{font:500 .62rem/1 var(--f-mono);letter-spacing:.12em;text-transform:uppercase;color:var(--slate)}
.pf-pager a:last-child:not(.pf-all){text-align:right}
.pf-pager .pf-all{background:var(--ink);border-color:var(--ink);color:#fff;text-align:center}
.pf-pager .pf-all span{color:var(--lime)}
@media (max-width:760px){.pf-pager{grid-template-columns:minmax(0,1fr)}.pf-pager a:last-child:not(.pf-all){text-align:left}.pf-pager>span:empty{display:none}}

@media (prefers-reduced-motion:reduce){
  .pf-card,.pf-pager a,.pf-go span{transition:none}
  a.pf-card:hover,.pf-pager a:hover{transform:none}
}

/* ── research write-ups (src/components/ResearchArticle.astro) ── */
.rs-head{isolation:isolate;overflow:hidden}
.rs-head .eyebrow a{display:inline-flex;align-items:center;min-height:44px;text-decoration:none}
.rs-head .eyebrow a:hover{text-decoration:underline;text-decoration-color:var(--lime-deep)}
.rs-head h1{max-width:16ch}
.rs-meta{display:grid;grid-template-columns:repeat(auto-fit,minmax(12rem,1fr));gap:1rem 2rem;margin:2rem 0 0;max-width:66rem}
.rs-meta div{min-width:0;border-top:1px solid var(--rule-2);padding-top:.7rem}
.rs-meta dt{font:500 .66rem/1.3 var(--f-mono);letter-spacing:.12em;text-transform:uppercase;color:var(--slate)}
.rs-meta dd{margin:.35rem 0 0;font-size:.98rem;line-height:1.45;color:var(--ink-2)}
.rs-actions{display:flex;flex-wrap:wrap;gap:.7rem;margin-top:1.8rem}
.rs-actions .btn{min-height:44px}
.rs-gh{width:1.05em;height:1.05em;flex:none}

/* the explainer: a section with .rs-stage (the picture) and .rs-bar (controls + readouts) */
.rs-explainer{margin-bottom:clamp(3rem,6vw,5rem)}
.rs-explainer-title{display:flex;align-items:baseline;justify-content:space-between;gap:1rem;margin:0 0 .9rem;font:500 .7rem/1.3 var(--f-mono);letter-spacing:.14em;text-transform:uppercase;color:var(--slate)}
.rs-stage{position:relative;min-height:clamp(380px,56vh,620px);border-radius:24px;background:radial-gradient(120% 90% at 60% 30%,var(--white),var(--mist));border:1px solid var(--rule);overflow:hidden}
.rs-stage>svg,.rs-stage>canvas{position:absolute;inset:0;width:100%;height:100%}
.rs-stage .rs-note{position:absolute;left:1rem;bottom:.8rem;font:500 .66rem/1.2 var(--f-mono);letter-spacing:.06em;color:var(--slate);pointer-events:none}
.rs-fallback{position:absolute;inset:0;display:grid;place-items:center;align-content:center;gap:1rem;padding:1.5rem;text-align:center;color:var(--slate)}
.rs-ready .rs-fallback{display:none}
.rs-bar{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:1.2rem 2rem;margin-top:1rem;align-items:start}
.rs-controls{display:grid;gap:.75rem}
.rs-row{display:flex;flex-wrap:wrap;align-items:center;gap:.6rem .8rem}
.rs-k{font:500 .66rem/1.3 var(--f-mono);letter-spacing:.12em;text-transform:uppercase;color:var(--slate);min-width:4.6rem;margin:0}
.rs-row input[type="range"]{flex:1 1 10rem;min-width:0;accent-color:var(--ink);height:44px}
.rs-row select{min-height:44px;padding:0 .9rem;border-radius:999px;border:1px solid var(--ink);background:var(--white);font:600 .88rem/1 var(--f-sans);color:var(--ink)}
.rs-seg{display:inline-flex;flex-wrap:wrap;border:1px solid var(--ink);border-radius:22px;overflow:hidden}
.rs-seg label{position:relative}
.rs-seg input{position:absolute;inset:0;opacity:0;margin:0;cursor:pointer}
.rs-seg span{display:block;min-width:44px;min-height:44px;padding:.8rem .95rem;text-align:center;font:600 .84rem/1 var(--f-sans)}
.rs-seg input:checked+span{background:var(--ink);color:var(--lime)}
.rs-seg input:focus-visible+span{outline:2px solid var(--lime-deep);outline-offset:-4px}
.rs-check{display:inline-flex;align-items:center;gap:.4rem;font-size:.9rem;min-height:44px;cursor:pointer}
.rs-check input{width:18px;height:18px;accent-color:var(--ink)}
.btn.sm{padding:.6rem 1rem;font-size:.86rem;min-height:44px}
.rs-read{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));margin:0;border:1px solid var(--rule);border-radius:18px;background:var(--white);overflow:hidden}
.rs-read div{padding:.8rem 1rem;border-bottom:1px solid var(--rule);min-width:0}
.rs-read div:nth-child(odd){border-right:1px solid var(--rule)}
.rs-read div:nth-last-child(-n+2){border-bottom:0}
.rs-read dt{font:500 .62rem/1.3 var(--f-mono);letter-spacing:.1em;text-transform:uppercase;color:var(--slate)}
.rs-read dd{margin:.2rem 0 0;font:600 1.5rem/1.1 var(--f-mono);font-variant-numeric:tabular-nums;color:var(--ink)}
.rs-read dd small{font-size:.72rem;font-weight:500;color:var(--slate);margin-left:.2rem}
.rs-caption{margin:.9rem 0 0;max-width:70ch;font-size:.95rem;line-height:1.55;color:var(--slate)}

/* body: contents beside prose */
.rs-cols{display:grid;grid-template-columns:13rem minmax(0,46rem);gap:3rem;justify-content:center}
.rs-toc{position:sticky;top:calc(6rem + env(safe-area-inset-top,0px));align-self:start}
.rs-toc ol{list-style:none;margin:.6rem 0 0;padding:0;display:grid;gap:.15rem;font-size:.92rem}
.rs-toc a{display:block;padding:.35rem 0;color:var(--slate);text-decoration:none}
.rs-toc a:hover,.rs-toc a[aria-current="true"]{color:var(--ink)}
.rs-prose h2{scroll-margin-top:6rem}
.rs-prose .prose-figure img[src$=".svg"]{padding:1rem;background:var(--white)}

/* figures drawn in the page: inline SVG charts and step diagrams */
.rs-fig{margin:2rem 0;padding:clamp(1rem,2.5vw,1.5rem);border:1px solid var(--rule);border-radius:20px;background:var(--white)}
.rs-fig svg{width:100%;height:auto;overflow:visible}
.rs-fig figcaption{margin-top:.9rem;font-size:.95rem;line-height:1.55;color:var(--slate)}
.rs-fig figcaption strong{color:var(--ink)}
.rs-fig text{font-family:var(--f-mono);fill:var(--slate)}
.rs-fig .ink{fill:var(--ink)}
.rs-fig .lime{fill:var(--lime)}
.rs-fig .rule{stroke:var(--rule)}
.rs-steps{list-style:none;counter-reset:rs;padding:0!important;display:grid;gap:.8rem;margin:1.6rem 0}
.rs-steps>li{counter-increment:rs;position:relative;margin:0!important;padding:1rem 1.1rem 1rem 3.4rem;border:1px solid var(--rule);border-radius:16px;background:var(--white)}
.rs-steps>li::before{content:counter(rs);position:absolute;left:1rem;top:1rem;display:grid;place-items:center;width:1.6rem;height:1.6rem;border-radius:50%;background:var(--ink);color:var(--lime);font:600 .78rem/1 var(--f-mono)}
.rs-steps strong{display:block;margin-bottom:.15rem}
.rs-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(10rem,1fr));gap:10px;margin:1.6rem 0;padding:0!important;list-style:none}
.rs-stats li{margin:0!important;padding:1rem 1.1rem;border-radius:16px;background:var(--ink);color:#EDEDE6}
.rs-stats b{display:block;font:650 clamp(1.5rem,3vw,2rem)/1.05 var(--f-mono);color:var(--lime);font-variant-numeric:tabular-nums}
.rs-stats span{display:block;margin-top:.4rem;font-size:.86rem;line-height:1.4;color:#C9CBC2}
.rs-table td:first-child{width:42%;font-weight:600;color:var(--ink)}
.rs-limits li::marker{content:"– ";color:var(--slate-2)}
.rs-credits{font-size:1rem;color:var(--slate)}

@media (max-width:900px){
  .rs-cols{grid-template-columns:minmax(0,1fr);gap:1.5rem}
  .rs-toc{position:static}
  .rs-toc ol{display:flex;flex-wrap:wrap;gap:.1rem 1rem}
  .rs-bar{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:640px){
  .rs-stage{min-height:clamp(360px,64vh,520px);border-radius:18px}
  .rs-read dd{font-size:1.2rem}
}
@media (prefers-reduced-motion:reduce){
  .rs-stage *{animation:none!important;transition:none!important}
}