/* =====================================================================
   Research page (research.html) — page-specific styles. Tokens only.
   ===================================================================== */

/* ---------- hero ---------- */
.rs-hero h1 { max-width: 18ch; }
.rs-hero .lead { max-width: 64ch; }
.rs-hero-grid {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr); gap: clamp(24px, 4vw, 56px);
  margin-top: clamp(28px, 4vw, 44px); align-items: start; max-width: 1040px;
}
.rs-quote { margin: 0; padding: 2px 0 2px 22px; border-left: 4px solid var(--accent); }
.rs-quote p { font-family: var(--font-body); font-style: italic; font-weight: 400; font-size: clamp(1.35rem, 2.2vw, 1.7rem); line-height: 1.3; color: var(--text); margin: 0 0 .7rem; letter-spacing: -0.005em; }
.rs-quote footer { font: 600 .8rem/1.5 var(--font-display); color: var(--text-3); letter-spacing: .01em; }
.rs-quote footer a { color: var(--text-2); }
.rs-quote footer a:hover { color: var(--accent); }
.rs-hero-facts { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 24px; border-top: var(--rule); }
.rs-hero-facts li { padding: 12px 0; border-bottom: var(--hair); display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.rs-hero-facts .k { font: 700 .72rem/1.2 var(--font-display); letter-spacing: .06em; text-transform: uppercase; color: var(--text-3); }
.rs-hero-facts .v { color: var(--text); font-weight: 600; font-size: .98rem; line-height: 1.35; }
.rs-hero-facts .v a { color: var(--text); }
.rs-hero-facts .v a:hover { color: var(--accent); }
.rs-jump { display: flex; flex-wrap: wrap; gap: 0; margin-top: clamp(28px, 4vw, 40px); border-top: var(--hair); border-bottom: var(--hair); }
.rs-jump a { font: 700 .86rem/1 var(--font-display); color: var(--text); padding: 1em 1.1em; border-left: var(--hair); transition: color .2s, box-shadow .2s; }
.rs-jump a:first-child { border-left: 0; padding-left: 0; }
.rs-jump a:hover { color: var(--accent); box-shadow: inset 0 -3px 0 var(--accent); }
.rs-jump a[hidden] { display: none; }
@media (max-width: 820px) { .rs-hero-grid { grid-template-columns: 1fr; } }
@media (max-width: 420px) { .rs-hero-facts { grid-template-columns: 1fr; } }

/* ---------- depth ribbon ---------- */
.rs-depth-section { padding-top: clamp(24px, 4vw, 40px); }
.rs-depth-head { display: grid; grid-template-columns: auto 1fr; column-gap: 24px; align-items: baseline; margin-bottom: 8px; }
.rs-depth-head .eyebrow { grid-column: 1 / -1; margin-bottom: .5rem; }
.rs-h2-sm { font-size: clamp(1.4rem, 2.4vw, 1.9rem); margin: 0; }
.rs-depth-head p { margin: 0; font-size: .95rem; }
.rs-depth { position: relative; height: 290px; margin-top: 12px; }
.rs-depth-axis { position: absolute; left: 0; right: 0; top: 60%; height: 0; }
.rs-depth-line { position: absolute; left: 0; right: 0; top: -1px; height: 2px; background: var(--text); }
.rs-depth-tick { position: absolute; left: calc(var(--p) * 100%); top: 0; transform: translateX(-50%); }
.rs-depth-tick i { display: block; width: 1px; height: 8px; background: var(--text); margin: -3px auto 0; }
.rs-depth-tick b { display: block; font: 600 .7rem/1 var(--font-display); color: var(--text-3); letter-spacing: .01em; white-space: nowrap; margin-top: 7px; font-variant-numeric: tabular-nums; }
.rs-depth-tick:first-of-type b { transform: translateX(40%); }
.rs-depth-tick:last-of-type b { transform: translateX(-40%); }
.rs-depth-mark { position: absolute; left: calc(var(--p) * 100%); top: 0; width: calc(var(--w) * 100%); height: 0; }
.rs-depth-mark .bar {
  position: absolute; left: -4px; top: -4px; height: 8px; width: calc(100% + 8px);
  background: var(--c);
}
.rs-depth-mark .stem { position: absolute; left: 0; width: 1px; background: var(--c); }
.rs-depth-mark .lbl { position: absolute; left: -4px; white-space: nowrap; display: flex; flex-direction: column; gap: 2px; }
.rs-depth-mark.end .lbl { left: auto; right: -4px; text-align: right; align-items: flex-end; }
.rs-depth-mark .lbl strong { font: 700 .84rem/1.2 var(--font-display); color: var(--text); letter-spacing: -0.005em; }
.rs-depth-mark .lbl em { font: 600 .72rem/1.2 var(--font-display); font-style: normal; color: var(--c); letter-spacing: .01em; }
.rs-depth-mark.a1 .stem { bottom: 6px; height: 26px; } .rs-depth-mark.a1 .lbl { bottom: 34px; }
.rs-depth-mark.a2 .stem { bottom: 6px; height: 70px; } .rs-depth-mark.a2 .lbl { bottom: 78px; }
.rs-depth-mark.a3 .stem { bottom: 6px; height: 114px; } .rs-depth-mark.a3 .lbl { bottom: 122px; }
.rs-depth-mark.b1 .stem { top: 6px; height: 34px; }   .rs-depth-mark.b1 .lbl { top: 42px; }
.rs-depth-mark.b2 .stem { top: 6px; height: 72px; }   .rs-depth-mark.b2 .lbl { top: 80px; }
/* entrance */
.rs-depth .rs-depth-mark { opacity: 0; transform: translateY(6px); transition: opacity .7s var(--ease), transform .7s var(--ease); transition-delay: calc(var(--i) * 90ms + 150ms); }
.rs-depth.on .rs-depth-mark { opacity: 1; transform: none; }
.rs-depth .rs-depth-line { transform-origin: left; transform: scaleX(0); transition: transform 1.2s var(--ease); }
.rs-depth.on .rs-depth-line { transform: none; }
/* vertical layout for narrow screens */
@media (max-width: 1100px) {
  .rs-depth-head { grid-template-columns: 1fr; }
  .rs-depth { height: 620px; }
  .rs-depth-axis { left: 72px; right: auto; top: 0; bottom: 0; width: 0; height: auto; }
  .rs-depth-line { left: -1px; top: 0; bottom: 0; right: auto; width: 2px; height: auto; background: var(--text); }
  .rs-depth .rs-depth-line { transform-origin: top; transform: scaleY(0); }
  .rs-depth.on .rs-depth-line { transform: none; }
  .rs-depth-tick { left: 0; top: calc(var(--p) * 100%); transform: translateY(-50%); }
  .rs-depth-tick i { width: 7px; height: 1px; margin: 0 0 0 -3px; }
  .rs-depth-tick b { position: absolute; right: 14px; top: -5px; margin: 0; }
  .rs-depth-tick:first-of-type b, .rs-depth-tick:last-of-type b { transform: none; }
  .rs-depth-mark { left: 0; top: calc(var(--p) * 100%); width: 0; height: calc(var(--w) * 100%); }
  .rs-depth-mark .bar { left: -4px; top: -4px; width: 8px; height: calc(100% + 8px); }
  .rs-depth-mark .stem { display: none; }
  .rs-depth-mark .lbl, .rs-depth-mark.end .lbl { left: 20px; right: auto; top: -9px; bottom: auto; text-align: left; align-items: baseline; flex-direction: row; flex-wrap: wrap; gap: 2px 8px; white-space: normal; width: min(62vw, 300px); }
  .rs-depth-mark.a1 .lbl, .rs-depth-mark.a2 .lbl, .rs-depth-mark.a3 .lbl, .rs-depth-mark.b1 .lbl, .rs-depth-mark.b2 .lbl { top: -9px; bottom: auto; }
  /* nudge crowded deep markers apart */
  .rs-depth-mark[data-i="3"] .lbl { top: -22px; }
  .rs-depth-mark[data-i="4"] .lbl { top: 4px; }
  .rs-depth-mark[data-i="5"] .lbl { top: -12px; }
  .rs-depth-mark[data-i="6"] .lbl { top: -16px; }
  .rs-depth-mark[data-i="7"] .lbl { top: 4px; }
}

/* shared .section-head p rule would otherwise enlarge eyebrows on this page */
.section-head p.eyebrow, .rs-depth-head p.eyebrow { font-size: .74rem; }

/* ---------- themes ---------- */
.rs-themes { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(32px, 4vw, 48px) clamp(24px, 3vw, 40px); }
.rs-theme {
  --c: var(--accent);
  position: relative; display: flex; flex-direction: column; gap: 10px; min-width: 0;
  padding: 20px 0 0; color: var(--text-2); border-top: var(--rule); transition: border-color .2s;
}
.rs-theme:hover { border-top-color: var(--accent); color: var(--text-2); }
.rs-theme:hover h3 { color: var(--accent); }
.rs-theme-top { display: flex; align-items: center; gap: 10px; }
.rs-theme-icon { width: 30px; height: 30px; display: grid; place-items: center; color: var(--c); flex: none; }
.rs-theme-icon svg { width: 26px; height: 26px; }
.rs-theme-label { font: 700 .76rem/1.2 var(--font-display); letter-spacing: .06em; text-transform: uppercase; color: var(--c); }
.rs-theme-count { margin-left: auto; font: 600 .78rem/1 var(--font-display); color: var(--text-3); white-space: nowrap; }
.rs-theme-count span { color: var(--text); font-weight: 800; }
.rs-theme h3 { font-size: 1.3rem; line-height: 1.2; margin: 4px 0 0; color: var(--text); transition: color .2s; }
.rs-theme p { font-size: .96rem; line-height: 1.6; margin: 0; }
.rs-theme-marks { list-style: none; margin: 2px 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 4px 8px; }
.rs-theme-marks li { font: 600 .78rem/1.3 var(--font-display); letter-spacing: 0; color: var(--text-2); white-space: nowrap; }
.rs-theme-marks li:not(:last-child)::after { content: "·"; margin-left: 8px; color: var(--text-3); }
.rs-theme-go { margin-top: auto; padding-top: 8px; display: inline-flex; align-items: center; gap: .45em; font: 700 .86rem/1 var(--font-display); color: var(--text); }
.rs-theme-go svg { width: 1em; height: 1em; color: var(--accent); }
@media (min-width: 1000px) {
  .rs-theme { display: grid; grid-template-columns: 150px minmax(0, 1fr); column-gap: 24px; row-gap: 10px; align-content: start; padding: 22px 0 0; }
  .rs-theme-top { grid-column: 1; grid-row: 1 / span 4; flex-direction: column; align-items: flex-start; gap: 10px; }
  .rs-theme-icon { width: 36px; height: 36px; place-items: start; }
  .rs-theme-icon svg { width: 32px; height: 32px; }
  .rs-theme-count { margin-left: 0; }
  .rs-theme h3, .rs-theme p, .rs-theme-marks, .rs-theme-go { grid-column: 2; }
  .rs-theme h3 { margin-top: 0; }
}
@media (max-width: 760px) { .rs-themes { grid-template-columns: 1fr; } }

/* ---------- features (discoveries) ---------- */
.rs-features { display: grid; grid-template-columns: 240px minmax(0, 1fr); gap: clamp(32px, 5vw, 72px); align-items: start; }
.rs-features > *, .rs-art-body > *, .rs-figure, .rs-figure-frame { min-width: 0; }
.rs-toc ol { min-width: 0; max-width: 100%; }
.rs-toc { position: sticky; top: calc(var(--nav-h) + 28px); max-height: calc(100vh - var(--nav-h) - 56px); overflow: auto; }
.rs-toc-title { font: 700 .76rem/1 var(--font-display); letter-spacing: .08em; text-transform: uppercase; color: var(--text); margin: 0; padding: 0 0 12px; border-bottom: var(--rule); }
.rs-toc ol { list-style: none; margin: 0; padding: 0; display: grid; gap: 0; }
.rs-toc a {
  --c: var(--accent);
  display: grid; grid-template-columns: 26px 1fr; gap: 8px; padding: 10px 8px 10px 0;
  border-bottom: var(--hair); color: var(--text-2); font: 600 .88rem/1.3 var(--font-display);
  transition: color .2s, box-shadow .2s;
}
.rs-toc a .n { font: 700 .74rem/1.75 var(--font-display); color: var(--text-3); font-variant-numeric: tabular-nums; }
.rs-toc a:hover { color: var(--accent); }
.rs-toc a[aria-current="true"] { color: var(--text); box-shadow: inset 4px 0 0 var(--accent); padding-left: 12px; }
.rs-toc a[aria-current="true"] .n { color: var(--accent); }

.rs-articles { min-width: 0; }
.rs-article { --c: var(--accent); padding-bottom: clamp(48px, 7vw, 88px); margin-bottom: clamp(48px, 7vw, 88px); border-bottom: 1px solid var(--line); scroll-margin-top: calc(var(--nav-h) + 24px); }
.rs-article:last-child { border-bottom: 0; margin-bottom: 0; padding-bottom: 0; }
.rs-kicker { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin: 0 0 18px; }
.rs-art-num { font: 800 .9rem/1 var(--font-display); color: var(--text); letter-spacing: 0; padding-right: 10px; border-right: 1px solid var(--line); font-variant-numeric: tabular-nums; }
.rs-kicker-text { display: inline-flex; align-items: center; gap: .55em; font: 700 .76rem/1.3 var(--font-display); letter-spacing: .07em; text-transform: uppercase; color: var(--c); }
.rs-kicker-text::before { content: ""; width: 8px; height: 8px; background: var(--c); }
.rs-headline { font-size: clamp(1.9rem, 3.6vw, 3rem); font-weight: 800; letter-spacing: -0.03em; line-height: 1.04; max-width: 22ch; margin-bottom: .45em; }
.rs-dek { font-size: clamp(1.08rem, 1.5vw, 1.25rem); color: var(--text-2); line-height: 1.55; max-width: 60ch; margin-bottom: 28px; }

/* figures sit on a white plate with a hairline frame, captioned like a journal figure */
.rs-figure { margin: 0 0 32px; }
.rs-figure-frame { position: relative; border: var(--hair); border-top: var(--rule); overflow: hidden; background: var(--surface); padding: clamp(10px, 2vw, 22px); }
.rs-figure-frame svg { width: 100%; height: auto; display: block; aspect-ratio: 640 / 400; }
.rs-figure figcaption { margin-top: 12px; font-size: .9rem; line-height: 1.55; color: var(--text-2); max-width: 78ch; }
.rs-fig-tag { font: 800 .78rem/1 var(--font-display); letter-spacing: 0; text-transform: none; color: var(--text); margin-right: .4em; }

.rs-art-body { display: block; }
.rs-art-body.has-big { display: grid; grid-template-columns: minmax(0, 1fr) 230px; gap: clamp(24px, 4vw, 48px); align-items: start; }
.rs-summary p { font-size: 1.04rem; line-height: 1.75; color: var(--text-2); max-width: 66ch; }
.rs-summary p.first { color: var(--text); }
.rs-summary p.first::first-letter {
  font-family: var(--font-body); font-weight: 600; float: left; font-size: 3.6em; line-height: .82; padding: .07em .09em 0 0; color: var(--accent);
}
.rs-big { position: sticky; top: calc(var(--nav-h) + 28px); padding: 14px 0 16px; border-top: 4px solid var(--accent); border-bottom: var(--hair); }
.rs-big-val { font-family: var(--font-display); font-weight: 800; font-size: clamp(2.3rem, 3.6vw, 3.1rem); line-height: 1; letter-spacing: -0.04em; color: var(--text); font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.rs-big-val.long { font-size: clamp(1.9rem, 2.6vw, 2.35rem); }
.rs-big-label { margin-top: 12px; font-size: .9rem; line-height: 1.45; color: var(--text-2); }

/* neutral sidebar box (no topic tint); the red rule carries the emphasis */
.rs-why { margin: 28px 0 0; padding: 22px 24px; background: var(--bg-2); border-left: 4px solid var(--accent); }
.rs-why h4 { font: 700 .78rem/1 var(--font-display); letter-spacing: .08em; text-transform: uppercase; color: var(--text); margin: 0 0 14px; }
.rs-why ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.rs-why li { position: relative; padding-left: 22px; color: var(--text); font-size: 1rem; line-height: 1.55; }
.rs-why li::before { content: ""; position: absolute; left: 2px; top: .6em; width: 7px; height: 7px; background: var(--accent); }

.rs-cite { margin-top: 28px; padding-top: 20px; border-top: var(--hair); }
.rs-cite-tag { display: block; font: 700 .74rem/1 var(--font-display); letter-spacing: .08em; text-transform: uppercase; color: var(--text-3); margin-bottom: 10px; }
.rs-cite-title { font-weight: 600; color: var(--text); line-height: 1.4; margin-bottom: .3rem; }
.rs-cite-title a { color: var(--text); }
.rs-cite-title a:hover { color: var(--accent); }
.rs-cite-authors { color: var(--text-2); font-size: .92rem; margin-bottom: .25rem; }
.rs-cite-authors .me { color: var(--text); font-weight: 600; }
.rs-cite-authors .group { text-decoration: underline; text-decoration-color: var(--accent); text-underline-offset: 3px; text-decoration-thickness: 1.5px; }
.rs-cite-venue { color: var(--text-2); font-size: .92rem; }
.rs-cite-links { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.rs-cite-links .btn { font-family: var(--font-display); font-weight: 700; font-size: .8rem; }
.rs-btn-quiet { border-color: transparent; color: var(--text-2); }
.rs-btn-quiet:hover { border-color: var(--text); background: transparent; color: var(--text); }

.rs-press { margin-top: 22px; }
.rs-press ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.rs-press a { display: flex; align-items: baseline; gap: 10px; color: var(--text-2); font-size: .94rem; text-decoration: none; }
.rs-press a .o { font: 700 .76rem/1 var(--font-display); color: var(--text); text-transform: uppercase; letter-spacing: .05em; white-space: nowrap; }
.rs-press a .t { color: var(--text); }
.rs-press a svg { width: .85em; height: .85em; flex: none; opacity: .6; align-self: center; }
.rs-press li, .rs-press a, .rs-press a .t { min-width: 0; }
@media (max-width: 640px) {
  .rs-press a { flex-wrap: wrap; gap: 2px 8px; }
  .rs-press a .o { white-space: normal; flex-basis: 100%; }
  .rs-press a .t { flex: 1 1 0; }
}
.rs-press a:hover .t { color: var(--accent); text-decoration: underline; text-decoration-color: var(--accent); }

.rs-pn { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 36px; }
.rs-pn a { display: flex; flex-direction: column; gap: 6px; padding: 14px 0 0; border-top: var(--rule); color: var(--text); transition: border-color .2s; min-width: 0; }
.rs-pn a:hover { border-top-color: var(--accent); color: var(--accent); }
.rs-pn a span { font: 700 .74rem/1 var(--font-display); letter-spacing: .07em; text-transform: uppercase; color: var(--text-3); }
.rs-pn a strong { font-family: var(--font-display); font-weight: 700; font-size: 1.05rem; line-height: 1.25; }
.rs-pn-next { text-align: right; grid-column: 2; }

@media (max-width: 1080px) {
  .rs-features { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .rs-toc {
    position: sticky; top: var(--nav-h); z-index: 20; max-height: none; overflow: visible; min-width: 0;
    margin: 0 -24px 28px; padding: 0 24px; background: var(--bg);
    border-bottom: var(--hair);
  }
  .rs-toc-title { display: none; }
  .rs-toc ol { display: flex; gap: 0; border-left: 0; overflow-x: auto; scrollbar-width: none; -webkit-overflow-scrolling: touch; scroll-snap-type: x proximity; padding: 0; }
  .rs-toc ol::-webkit-scrollbar { display: none; }
  .rs-toc li { flex: none; scroll-snap-align: start; }
  .rs-toc a {
    display: inline-flex; align-items: center; gap: 8px; margin: 0; padding: 13px 12px 11px; border: 0;
    white-space: nowrap; font-size: .84rem; max-width: 72vw;
  }
  .rs-toc a .t { overflow: hidden; text-overflow: ellipsis; }
  .rs-toc a .n { line-height: 1; }
  .rs-toc a[aria-current="true"] { padding-left: 12px; box-shadow: inset 0 -3px 0 var(--accent); }
  .rs-article { scroll-margin-top: calc(var(--nav-h) + 76px); }
}
@media (max-width: 760px) {
  .rs-art-body.has-big { grid-template-columns: 1fr; }
  .rs-big { position: static; display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 16px; order: -1; }
  .rs-big-label { margin-top: 0; flex: 1 1 200px; }
}
@media (max-width: 640px) {
  .rs-toc { margin: 0 -16px 24px; padding: 10px 16px; }
  .rs-pn { grid-template-columns: 1fr; }
  .rs-pn-next { grid-column: 1; }
  .rs-why { padding: 18px 18px; }
}

/* ---------- tools ---------- */
.rs-tools { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.rs-tools { gap: clamp(32px, 4vw, 44px) clamp(24px, 3vw, 36px); }
.rs-tool { --c: var(--accent); display: flex; flex-direction: column; gap: 10px; min-width: 0; }
.rs-tool-top { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.rs-tool-kind { font: 700 .74rem/1 var(--font-display); letter-spacing: .07em; text-transform: uppercase; color: var(--text-3); }
.rs-tool-kind[data-kind="model"] { color: var(--accent); }
.rs-tool h3 { font-size: 1.25rem; margin: 4px 0 0; }
.rs-tool p { font-size: .95rem; line-height: 1.6; color: var(--text-2); margin: 0; }
.rs-tool-stats { display: flex; gap: 22px; margin: 4px 0 0; }
.rs-tool-stats div { display: flex; flex-direction: column-reverse; }
.rs-tool-stats dd { margin: 0; font-family: var(--font-display); font-weight: 800; font-size: 1.7rem; line-height: 1.05; color: var(--text); letter-spacing: -0.03em; }
.rs-tool-stats dt { font: 600 .7rem/1.4 var(--font-display); letter-spacing: .05em; text-transform: uppercase; color: var(--text-3); }
.rs-tool .rs-tool-ref { font: 500 .8rem/1.45 var(--font-display); color: var(--text-3); margin-top: auto; padding-top: 6px; }
.rs-tool-links { display: flex; flex-wrap: wrap; gap: 6px 14px; padding-top: 12px; border-top: 1px solid var(--line); }
.rs-tool-links a { display: inline-flex; align-items: center; gap: .35em; font-size: .86rem; font-weight: 600; }
.rs-tool-links a svg { width: .85em; height: .85em; opacity: .75; }
@media (max-width: 1000px) { .rs-tools { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 640px) { .rs-tools { grid-template-columns: 1fr; } }

/* ---------- CTA ---------- */
.rs-cta {
  position: relative; overflow: hidden; display: grid; grid-template-columns: minmax(0, 1.4fr) auto; gap: 32px; align-items: center;
  padding: clamp(28px, 5vw, 56px); background: var(--bg-2); border-top: 6px solid var(--accent);
}
.section.alt .rs-cta { background: var(--bg); }
.rs-cta h2 { margin-bottom: .3em; }
.rs-cta .lead { margin: 0; max-width: 54ch; }
.rs-cta-actions { display: flex; flex-direction: column; gap: 12px; align-items: stretch; }
.rs-cta-actions .btn { justify-content: center; }
@media (max-width: 760px) { .rs-cta { grid-template-columns: 1fr; } .rs-cta-actions { flex-direction: row; flex-wrap: wrap; } }

/* =====================================================================
   Most-cited papers, revisited — Next steps / Critique toggle
   ===================================================================== */
.rv-anchor { position: absolute; top: calc(-1 * var(--nav-h)); }
#revisited { position: relative; }
.rv-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 32px; flex-wrap: wrap; margin-bottom: clamp(28px, 4vw, 44px); }
.rv-head .section-head { margin-bottom: 0; flex: 1 1 460px; }
.rv-head .section-head p:not(.eyebrow) { min-height: 3.3em; }
/* segmented control: black frame, selected tab filled black */
.rv-toggle {
  display: inline-grid; grid-template-columns: 1fr 1fr; gap: 0; padding: 0; flex: 0 1 520px;
  background: var(--bg); border: 2px solid var(--text);
}
.rv-tab {
  appearance: none; border: 0; background: transparent; color: var(--text); cursor: pointer; text-align: left;
  padding: 12px 16px; display: grid; gap: 3px; transition: background .2s, color .2s;
}
.rv-tab + .rv-tab { border-left: 2px solid var(--text); }
.rv-tab:hover { background: var(--bg-2); }
.rv-tab-title { font: 700 1rem/1.2 var(--font-display); }
.rv-tab-sub { font: 400 .8rem/1.35 var(--font-body); color: var(--text-2); }
.rv-tab[aria-selected="true"] { background: var(--text); color: var(--on-dark); }
.rv-tab[aria-selected="true"] .rv-tab-sub { color: var(--on-dark-2); }
.rv-tab[data-view="critique"][aria-selected="true"] { background: var(--accent); }
.rv-tab[data-view="critique"][aria-selected="true"] .rv-tab-sub { color: var(--on-dark); }

.rv-list { display: grid; gap: clamp(36px, 4vw, 48px); }
.rv-card { display: grid; grid-template-columns: 150px minmax(0, 1fr); gap: 28px; }
.rv-meta { display: flex; flex-direction: column; align-items: flex-start; gap: 10px; }
.rv-rank { font: 800 clamp(2.6rem, 5vw, 3.6rem)/0.9 var(--font-display); letter-spacing: -0.04em; color: var(--text); transition: color .2s; }
.rv-cites { font: 600 .78rem/1.3 var(--font-display); color: var(--text-3); letter-spacing: .02em; }
.rv-paper { display: inline-flex; align-items: center; gap: .4em; font: 700 .8rem/1.3 var(--font-display); color: var(--text); letter-spacing: 0; }
.rv-paper svg { width: .9em; height: .9em; opacity: .6; }
.rv-paper:hover { color: var(--accent); }
.rv-q { margin: .45rem 0 1rem; font-size: clamp(1.3rem, 2vw, 1.65rem); max-width: 36ch; }
.rv-label { font: 700 .76rem/1 var(--font-display); letter-spacing: .08em; text-transform: uppercase; color: var(--text-3); margin: 1.1rem 0 .5rem; }
.rv-panel > .rv-label:first-child { margin-top: 0; }
.rv-label-next { color: var(--text); }
.rv-label-crit { color: var(--accent); }
.rv-panel p { color: var(--text-2); max-width: 75ch; }
.rv-next-text { color: var(--text) !important; }
.rv-tags { display: flex; flex-wrap: wrap; gap: 6px; margin: .2rem 0 .9rem; }
.rv-tags .chip { --c: var(--text); }
.rv-refs { font-size: .88rem; margin: 0; }
.rv-refs a { color: var(--text-2); }
.rv-refs a:hover { color: var(--accent); }
.rv-crit { margin: 0; padding: 0; list-style: none; counter-reset: rv; display: grid; gap: 12px; max-width: 80ch; }
.rv-crit li { counter-increment: rv; position: relative; padding-left: 2.2em; color: var(--text-2); line-height: 1.6; }
.rv-crit li::before {
  content: counter(rv); position: absolute; left: 0; top: .15em; width: 1.5em; height: 1.5em;
  display: grid; place-items: center; font: 700 .74rem/1 var(--font-display); color: var(--on-accent); background: var(--accent);
}
.rv-crit strong { color: var(--text); font-weight: 600; }

/* view switching */
.rv-panel { animation: rv-in .45s var(--ease) both; }
#revisited[data-view="next"] .rv-panel-critique,
#revisited[data-view="critique"] .rv-panel-next { display: none; }
#revisited .rv-card:hover .rv-rank { color: var(--accent); }
#revisited[data-view="critique"] .rv-card { border-top-color: var(--accent); }
@keyframes rv-in { from { opacity: 0; } to { opacity: 1; } }
.rv-foot { margin: 22px 0 0; font-size: .82rem; }

@media (max-width: 760px) {
  .rv-card { grid-template-columns: 1fr; gap: 12px; }
  .rv-meta { flex-direction: row; align-items: center; flex-wrap: wrap; }
  .rv-rank { font-size: 2rem; }
  .rv-toggle { flex-basis: 100%; }
  .rv-tab { padding: 10px 12px; }
  .rv-tab-sub { display: none; }
  .rv-head .section-head p:not(.eyebrow) { min-height: 0; }
}
@media print {
  #revisited .rv-panel { display: block !important; }
  .rv-toggle { display: none; }
}