/* research.css v7 (BRIEF-V7 section 2.5), prefix rs-. Cream ground, eight coloured cards (4 x 2 from 1100 px, 2 x 4 from 761,
   one column on phones), the argan card double width from 1100 px. Each card: the cut-out small on a plate, the name, the
   measured line in the display face, the not-claimed line under a rule, a Sources details. Under the grid the close line and
   the button that opens the claims rules in a native dialog (story.js). The cards carry .reveal: base.css and app.js lift them. */
.rs{background:var(--cream);color:var(--ink);padding-block:max(clamp(64px,8vw,120px),var(--chap-room)) clamp(64px,8vw,120px)}
.rs-head{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,380px);gap:14px clamp(24px,4vw,64px);align-items:end;margin-bottom:clamp(28px,3.6vw,52px)}
.rs-head h2{margin-top:12px;max-width:16ch}
.rs-sub{font-size:19px;line-height:1.45;color:var(--ink-2);max-width:34ch}

/* the grid */
.rs-grid{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:minmax(0,1fr);gap:14px}
@media (min-width:761px){.rs-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}}
@media (min-width:1100px){.rs-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.rs-wide{grid-column:span 2}}

/* the cards: a coloured panel each, the rule and the plate tuned to its ground */
.rs-card{--rule:rgba(42,29,21,.18);--plate:rgba(251,247,238,.55);--floor:rgba(42,29,21,.12);position:relative;display:flex;flex-direction:column;min-width:0;border-radius:var(--r-lg);padding:18px 18px 18px}
.rs-card.t-terracotta{background:var(--terracotta);color:var(--off)}
.rs-card.t-sage{background:var(--sage);color:var(--ink)}
.rs-card.t-amber{background:var(--amber);color:var(--ink)}
.rs-card.t-plaster{background:var(--plaster-2);color:var(--ink)}
.rs-card.t-umber{background:var(--umber-2);color:var(--off)}
.rs-card.t-steam{background:var(--steam);color:var(--ink)}
.rs-card.t-terracotta-2{background:var(--terracotta-2);color:var(--off)}
.rs-card.t-terracotta,.rs-card.t-umber,.rs-card.t-terracotta-2{--rule:rgba(251,247,238,.3);--plate:rgba(251,247,238,.14);--floor:rgba(0,0,0,.22)}
.rs-top{display:flex;align-items:flex-end;gap:14px;min-width:0}
.rs-plate{position:relative;flex:none;width:112px;height:112px;border-radius:var(--r);overflow:hidden;display:flex;align-items:flex-end;justify-content:center;padding-bottom:8px;background:var(--plate)}
.rs-plate::before{content:"";position:absolute;left:0;right:0;bottom:0;height:12px;background:linear-gradient(rgba(42,29,21,0),var(--floor))}
.rs-cut{position:relative;display:block;width:auto;max-width:none;height:96px;translate:var(--dx,0%) 0}
.rs-name{font-size:clamp(24px,2.1vw,30px);line-height:1.02;padding-bottom:6px;min-width:0}
.rs-measured{margin-top:16px;font-family:var(--font-display);font-size:20px;line-height:1.42;font-weight:380;letter-spacing:-.005em;font-variation-settings:"SOFT" 30}
.rs-not{margin-top:14px;padding-top:12px;border-top:1px solid var(--rule);font-size:14px;line-height:1.5}
/* the sources: a small details at the foot of the card */
.rs-src{margin-top:auto;padding-top:14px}
.rs-src summary{display:inline-flex;align-items:center;gap:8px;list-style:none;cursor:pointer;font-size:12px;line-height:20px;letter-spacing:.11em;text-transform:uppercase;font-weight:700;min-height:28px}
.rs-src summary::-webkit-details-marker{display:none}
.rs-src summary:focus-visible{outline:2px solid currentColor;outline-offset:3px;border-radius:var(--r-sm)}
.rs-ico{position:relative;width:12px;height:12px;flex:none}
.rs-ico::before,.rs-ico::after{content:"";position:absolute;left:0;top:5px;width:12px;height:2px;background:currentColor;border-radius:1px}
.rs-ico::after{rotate:90deg}
.rs-src[open] .rs-ico::after{display:none}
.rs-src ul{list-style:none;margin:8px 0 0;padding:0;display:grid;gap:6px}
.rs-src li{font-size:13px;line-height:1.45}
.rs-src a{text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px;text-decoration-color:currentColor}
.rs-src a:hover{opacity:.8}
/* the wide argan card: two columns inside from 1100 px, the studies on the left, the limits and the sources on the right */
@media (min-width:1100px){
  .rs-wide{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);grid-template-rows:auto 1fr;column-gap:clamp(20px,2.4vw,36px);padding:20px 22px 20px 20px}
  .rs-wide .rs-top{grid-area:1/1}
  .rs-wide .rs-measured{grid-area:2/1;font-size:22px}
  .rs-wide .rs-not{grid-area:1/2/3/3;align-self:start;margin-top:0;padding-top:0;border-top:0;font-size:15px}
  .rs-wide .rs-src{grid-area:1/2/3/3;align-self:end;padding-top:16px;margin-top:0;border-top:1px solid var(--rule)}
  .rs-wide .rs-measured{margin-top:18px}
}

/* under the grid */
.rs-foot{margin-top:clamp(36px,4.5vw,64px);text-align:center}
.rs-close{font-family:var(--font-display);font-style:italic;font-weight:320;font-size:clamp(26px,2.8vw,40px);line-height:1.12;letter-spacing:-.015em;max-width:24ch;margin-inline:auto;font-variation-settings:"SOFT" 100}
.rs-rules{margin-top:16px}
.rs-open{font-size:14px;font-weight:600;line-height:1.3;padding:8px 0 2px;border-bottom:1.5px solid var(--terracotta);min-height:44px}
.rs-open:focus-visible{outline:2px solid var(--terracotta);outline-offset:4px;border-radius:var(--r-sm)}

/* the claims rules dialog */
.rs-dialog{position:fixed;inset:0;width:100%;height:100%;max-width:none;max-height:none;margin:0;padding:clamp(12px,3vw,40px);border:0;background:transparent;color:var(--ink);overflow:hidden;overscroll-behavior:contain}
.rs-dialog[open]{display:grid;place-items:center}
.rs-dialog::backdrop{background:rgba(42,29,21,.7)}
.rs-panel{position:relative;width:min(720px,100%);max-height:100%;overflow:auto;overscroll-behavior:contain;border-radius:10px;background:var(--cream);box-shadow:0 40px 80px -20px rgba(0,0,0,.5);padding:clamp(22px,3vw,40px)}
.rs-d-head{position:relative;padding-right:52px}
.rs-d-head h3{margin-top:10px;font-size:clamp(26px,2.6vw,36px)}
.rs-x{position:absolute;right:-8px;top:-8px;display:grid;place-items:center;width:44px;height:44px;border-radius:50%;color:var(--ink);background:var(--plaster-2)}
.rs-x:hover{background:var(--plaster)}
.rs-x:focus-visible{outline:2px solid var(--terracotta);outline-offset:2px}
.rs-list{list-style:none;counter-reset:rs;margin:22px 0 0;padding:0;display:grid;gap:12px}
.rs-list li{counter-increment:rs;display:grid;grid-template-columns:36px minmax(0,1fr);column-gap:10px;align-items:baseline;font-size:16px;line-height:1.5;padding-top:12px;border-top:1px solid rgba(42,29,21,.12)}
.rs-list li:first-child{border-top:0;padding-top:0}
.rs-list li::before{content:counter(rs);font-family:var(--font-display);font-size:22px;line-height:1;color:var(--terracotta);font-variation-settings:"SOFT" 40}
html.lx-live .rs-dialog[open] .rs-panel{animation:rsIn .32s var(--ease)}
html.lx-live .rs-dialog[open]::backdrop{animation:rsFade .3s var(--ease)}
html.lx-live .rs-dialog.is-closing .rs-panel{animation:rsOut .2s ease-in forwards}
html.lx-live .rs-dialog.is-closing::backdrop{animation:rsFade .2s ease-in reverse forwards}
@keyframes rsIn{from{opacity:0;transform:translateY(18px) scale(.985)}to{opacity:1;transform:none}}
@keyframes rsOut{from{opacity:1;transform:none}to{opacity:0;transform:translateY(18px) scale(.985)}}
@keyframes rsFade{from{opacity:0}to{opacity:1}}

@media (max-width:760px){
  .rs-head{grid-template-columns:minmax(0,1fr)}
  .rs-sub{font-size:17px}
  .rs-card{padding:16px 16px 16px}
  .rs-plate{width:96px;height:96px}
  .rs-cut{height:82px}
  .rs-name{font-size:24px}
  .rs-measured{font-size:19px}
  .rs-dialog{padding:0}
  .rs-dialog[open]{place-items:stretch}
  .rs-panel{width:100%;height:100%;max-height:none;border-radius:0;padding:18px 16px 32px}
  .rs-list li{font-size:16px}
}
@media (prefers-reduced-motion:reduce){html.lx-live .rs-dialog[open] .rs-panel,html.lx-live .rs-dialog[open]::backdrop,html.lx-live .rs-dialog.is-closing .rs-panel,html.lx-live .rs-dialog.is-closing::backdrop{animation:none}}