/* Research department site, Option E "Quarterly": plain CSS, no framework.
   The department is set like a quarterly research magazine. Structure is
   drawn with rules (a heavy ink rule opens every section, hairlines separate
   entries), headlines and standfirsts are set in the display serif, reading
   text and controls in the sans. Every page opens with a running head: where
   you are on the left, the page's own facts on the right.
   Every colour, size and space comes from /css/tokens.css, which the build
   copies from the active brand's token file (design/tokens-<brand>.css).
   This file holds no colour values of its own.
   Breakpoints: 600px, 820px and 1100px; custom properties cannot be read
   inside @media, so the numbers are written out here. */

/* base */
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scrollbar-color: var(--color-line-strong) var(--color-surface); }
body { margin: 0; min-height: 100vh; display: flex; flex-direction: column; background: var(--color-surface); color: var(--color-text); font-family: var(--font-body); font-size: var(--text-base); line-height: var(--leading); font-variant-numeric: lining-nums; }
main { flex: 1 0 auto; padding-bottom: var(--section); }
img { max-width: 100%; height: auto; display: block; }
::selection { background: var(--color-accent-tint); color: var(--color-text); }
a { color: var(--color-link); text-underline-offset: .2em; text-decoration-thickness: 1px; }
a:hover { color: var(--color-link-hover); text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--color-focus); outline-offset: 3px; border-radius: 1px; }
.demo :focus-visible, .site-footer :focus-visible, .skip:focus-visible { outline-color: var(--color-focus-on-inverse); }
h1, h2, h3, h4 { font-family: var(--font-heading); font-weight: var(--weight-heading); line-height: var(--leading-tight); color: var(--color-heading); margin: 0 0 var(--space-3); text-wrap: balance; }
h1 { font-size: var(--text-2xl); letter-spacing: -.015em; }
h2 { font-size: var(--text-xl); color: var(--color-heading-2); letter-spacing: -.01em; }
h3 { font-size: var(--text-lg); }
p { margin: 0 0 var(--space-4); }
time, .facts, .rh-facts, .pub-year { font-variant-numeric: tabular-nums lining-nums; }
.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding-inline: var(--gutter); }
.skip { position: absolute; left: -9999px; top: 0; background: var(--color-surface-inverse); color: var(--color-text-on-inverse); padding: var(--space-3) var(--space-4); z-index: 100; }
.skip:focus { left: var(--space-4); top: var(--space-4); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* demo banner (scrolls away; the header below it stays pinned) */
.demo { background: var(--demo-bar-bg); color: var(--demo-bar-text); font-size: var(--text-sm); line-height: var(--leading-snug); padding: var(--space-2) 0; }
.demo .wrap { display: flex; align-items: center; justify-content: center; gap: var(--space-2); text-align: center; }
.demo-tag { flex: none; background: var(--demo-tag-bg); color: var(--demo-tag-text); font-size: var(--text-xs); font-weight: var(--weight-strong); letter-spacing: var(--tracking-caps); text-transform: uppercase; border-radius: var(--radius-sm); padding: .05rem .45rem; }

/* header: the nameplate row, then the menu (a details element: a disclosure
   below 820px, always open above it), closed by the heavy ink rule. Pinned
   while the page scrolls. --header-pinned is at least its height, so anchor
   targets and the sticky fact box clear it. */
.site-header { background: var(--nav-bg); border-bottom: var(--rule-heavy) solid var(--color-rule); position: sticky; top: 0; z-index: 30; }
:root { --header-pinned: 5rem; }
@media (min-width: 821px) { :root { --header-pinned: 11rem; } }
@media (min-width: 1040px) { :root { --header-pinned: 8.5rem; } }
html { scroll-padding-top: calc(var(--header-pinned) + var(--space-4)); }
.masthead { position: relative; }
.header-top { padding-top: var(--space-3); padding-bottom: var(--space-2); display: flex; align-items: center; }
.brand { display: inline-flex; align-items: center; gap: var(--space-3); min-height: var(--tap); color: var(--color-heading); text-decoration: none; }
.brand:hover { color: var(--color-heading); }
.brand-mark { width: var(--logo-height); height: var(--logo-height); flex: none; border-radius: 2px; }
.brand-text { font-family: var(--font-heading); font-size: var(--text-lg); line-height: var(--leading-tight); letter-spacing: -.01em; }
.brand small { display: block; margin-top: .2rem; font-family: var(--font-body); font-size: var(--text-xs); color: var(--color-text-muted); letter-spacing: .01em; }
.brand-wordmark { gap: 0; }
.brand-logo { height: var(--logo-height); width: auto; flex: none; box-sizing: content-box; padding: var(--logo-clear) var(--logo-clear) var(--logo-clear) 0; }
.brand-divider { align-self: stretch; width: 1px; margin: var(--space-2) var(--space-4) var(--space-2) 0; background: var(--color-line-strong); }
.menu-site-name { display: none; }
.menu > summary { list-style: none; }
.menu > summary::-webkit-details-marker { display: none; }

/* above 820px the menu is always shown: summary hidden, content forced visible
   (::details-content: Firefox 143+, Chromium 131+, Safari 18.4+; elsewhere the
   Menu button simply stays visible at desktop width, which still works) */
@media (min-width: 821px) {
  .menu > summary { display: none; }
  .menu::details-content { content-visibility: visible; }
}
.nav-bar { background: var(--nav-bg); }
.nav { display: flex; flex-wrap: wrap; list-style: none; margin: 0 calc(var(--space-3) * -1); padding: 0; }
.nav > li { position: relative; }
.nav a { display: flex; align-items: center; min-height: var(--tap); padding: var(--space-2) var(--space-3); color: var(--nav-text); text-decoration: none; font-size: var(--text-base); font-weight: 600; }
.nav > li > a { min-height: 48px; box-shadow: inset 0 -3px 0 transparent; transition: box-shadow var(--duration) var(--easing), color var(--duration) var(--easing); }
.nav > li > a:hover { color: var(--nav-text-current); box-shadow: inset 0 -3px 0 var(--nav-hover-bar); }
.nav > li > a[aria-current="page"] { color: var(--nav-text-current); box-shadow: inset 0 -3px 0 var(--nav-current-bar); }
.nav > li > a:focus-visible { outline-color: var(--nav-focus); outline-offset: -3px; }
.nav > .has-sub > a::after { content: ""; width: 9px; height: 6px; margin-left: var(--space-2); flex: none; background: currentColor; clip-path: polygon(0 0, 100% 0, 50% 100%); }
.nav .sub { position: absolute; top: calc(100% + var(--rule-heavy)); left: 0; min-width: 18rem; list-style: none; margin: 0; padding: var(--space-2) 0; background: var(--color-surface); border: 1px solid var(--color-line); border-top: 0; box-shadow: var(--shadow-hover); z-index: 40; display: none; }
.nav .sub a { padding: var(--space-2) var(--space-4); color: var(--color-text); font-size: var(--text-sm); font-weight: 400; }
.nav .sub a:hover { background: var(--color-surface-tint); color: var(--color-heading); }
.nav .sub a:focus-visible { outline-color: var(--color-focus); outline-offset: -3px; }
.nav > li:hover > .sub, .nav > li:focus-within > .sub { display: block; }

@media (max-width: 820px) {
  .header-top { padding-top: max(var(--space-2), var(--space-3) - var(--logo-clear)); padding-bottom: max(var(--space-2), var(--space-3) - var(--logo-clear)); padding-right: calc(var(--gutter) + 100px); }
  .brand-mark { width: var(--logo-height-narrow); height: var(--logo-height-narrow); }
  .brand-logo { height: var(--logo-height-narrow); }
  .brand-text { font-size: var(--text-md); }
  .brand-wordmark .brand-divider, .brand-wordmark .brand-text { display: none; }

  .menu > summary { display: flex; align-items: center; justify-content: center; gap: var(--space-2); position: absolute; right: var(--gutter); top: calc(max(var(--space-2), var(--space-3) - var(--logo-clear)) + max(0px, (var(--logo-height-narrow) + 2 * var(--logo-clear) - var(--tap)) / 2)); min-width: var(--tap); min-height: var(--tap); padding: 0 var(--space-3); border: 1px solid var(--color-rule); border-radius: var(--radius-sm); background: var(--color-surface); color: var(--color-text); font-weight: 700; font-size: var(--text-sm); cursor: pointer; transition: background-color var(--duration) var(--easing); }
  .menu > summary:hover { background: var(--color-surface-tint); }
  .menu-icon { width: 16px; height: 12px; flex: none; background: linear-gradient(currentColor, currentColor) top / 100% 2px no-repeat, linear-gradient(currentColor, currentColor) center / 100% 2px no-repeat, linear-gradient(currentColor, currentColor) bottom / 100% 2px no-repeat; }
  .menu[open] .menu-icon { background: linear-gradient(currentColor, currentColor) center / 100% 2px no-repeat; transform: rotate(45deg); position: relative; }
  .menu[open] .menu-icon::after { content: ""; position: absolute; inset: 0; background: linear-gradient(currentColor, currentColor) center / 2px 100% no-repeat; }
  .menu-label-close, .menu[open] .menu-label-open { display: none; }
  .menu[open] .menu-label-close { display: inline; }
  .menu[open] .nav-bar { border-top: 1px solid var(--color-line); max-height: calc(100vh - var(--header-pinned)); max-height: calc(100dvh - var(--header-pinned)); overflow-y: auto; overscroll-behavior: contain; }
  .nav-bar .wrap { padding: 0; }
  .menu-site-name { display: block; margin: 0; padding: var(--space-3) var(--gutter); font-family: var(--font-heading); font-size: var(--text-md); color: var(--color-heading); border-bottom: 1px solid var(--color-line); }
  .nav { display: block; margin: 0; }
  .nav > li > a { min-height: 52px; padding: var(--space-2) var(--gutter); font-family: var(--font-heading); font-weight: var(--weight-heading); font-size: var(--text-md); border-bottom: 1px solid var(--color-line); box-shadow: none; }
  .nav > li:last-child > a { border-bottom: 0; }
  .nav > li > a[aria-current="page"] { box-shadow: inset 4px 0 0 var(--nav-current-bar); }
  .nav > li > a:hover { box-shadow: inset 4px 0 0 var(--nav-hover-bar); }
  .nav > .has-sub > a::after { display: none; }
  .nav .sub { display: none !important; }
}
@media (max-width: 600px) {
  .brand small { display: none; }
  .brand-text { font-size: var(--text-base); }
}

/* running head: breadcrumb left, the page's facts right, on a hairline */
.running-head { border-bottom: 1px solid var(--color-line); font-size: var(--text-sm); line-height: var(--leading-snug); color: var(--color-text-muted); }
.rh-inner { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; column-gap: var(--space-6); row-gap: var(--space-1); padding-block: var(--space-3); }
.breadcrumb a { color: var(--color-text-muted); }
.breadcrumb a:hover { color: var(--color-link); }
.breadcrumb [aria-current] { color: var(--color-text); }
.rh-facts { margin: 0; display: flex; flex-wrap: wrap; column-gap: var(--space-4); row-gap: var(--space-1); color: var(--color-text); }
.rh-facts > * + * { padding-left: var(--space-4); border-left: 1px solid var(--color-line-strong); }
.rh-facts .ref { font-weight: 700; }
@media (max-width: 600px) {
  .rh-facts > * + * { padding-left: 0; border-left: 0; }
}

/* status: a filled square and the word */
.status { display: inline-flex; align-items: center; gap: .45em; font-weight: 700; color: var(--status-progress-fg); }
.status-sq { width: .7em; height: .7em; flex: none; background: var(--status-progress-bg); }
.status.recruiting { color: var(--status-recruiting-fg); }
.status.recruiting .status-sq { background: var(--status-recruiting-bg); }
.status.completed { color: var(--status-completed-fg); font-weight: 600; }
.status.completed .status-sq { background: transparent; box-shadow: inset 0 0 0 1.5px var(--status-completed-bg); }

/* page openers: headline and standfirst */
.page-head, .feature-head { padding-top: clamp(2rem, 5vw, 3.75rem); padding-bottom: var(--space-6); }
.page-head h1, .feature-head h1 { max-width: 22ch; margin-bottom: var(--space-4); }
.standfirst { font-family: var(--font-heading); font-size: var(--text-standfirst); line-height: 1.38; color: var(--color-text); max-width: var(--measure-lede); margin-bottom: var(--space-5); text-wrap: pretty; }
.page-head .standfirst:last-child, .feature-head .standfirst:last-child { margin-bottom: 0; }
.byline { font-size: var(--text-sm); color: var(--color-text-muted); margin: 0; }
.byline a { font-weight: 700; }
@media (min-width: 821px) {
  .page-head.with-plate { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); gap: var(--space-7); align-items: end; }
}
.page-head.with-plate .plate { margin-top: var(--space-5); }

/* plates: placeholder art sits on --art-bg and takes the brand's colour */
.plate { margin: 0; background: var(--art-bg); isolation: isolate; overflow: hidden; }
.plate img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; }
.plate img.placeholder { mix-blend-mode: var(--art-blend); }

/* buttons and links that act */
.btn-row { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-3) var(--space-5); }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 1.4rem; border-radius: var(--radius-sm); font-weight: 700; font-size: var(--text-base); text-decoration: none; transition: background-color var(--duration) var(--easing); }
.btn.primary { background: var(--color-accent); color: var(--color-on-accent); }
.btn.primary:hover { background: var(--color-accent-hover); color: var(--color-on-accent); }
.text-link { font-weight: 700; color: var(--color-accent-text); }
.btn-note { font-size: var(--text-sm); color: var(--color-text-muted); }
.cta { display: inline-flex; align-items: center; gap: .5em; min-height: var(--tap); font-weight: 700; color: var(--color-accent-text); text-decoration: none; }
.cta:hover { text-decoration: underline; }
.cta .arrow { width: 1em; height: .65em; transition: transform var(--duration) var(--easing); }
.cta:hover .arrow { transform: translateX(3px); }

/* home: the cover */
.cover { padding-top: clamp(2.5rem, 7vw, 6rem); }
.cover-title { font-size: var(--text-display); line-height: 1.02; letter-spacing: -.025em; max-width: 19ch; margin-bottom: 0; }
.cover-foot { margin-top: clamp(2rem, 4vw, 3rem); padding-top: var(--space-5); border-top: var(--rule-mid) solid var(--color-rule); display: grid; gap: var(--space-5); }
.cover-foot .standfirst { margin: 0; }
@media (min-width: 821px) {
  .cover-foot { grid-template-columns: minmax(0, 1fr) auto; align-items: start; column-gap: var(--space-8); }
}

/* sections: opened by the heavy ink rule */
.sec { margin-top: var(--section); }
.sec-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: var(--space-2) var(--space-5); border-top: var(--rule-heavy) solid var(--color-rule); padding-top: var(--space-3); margin-bottom: var(--space-5); }
.sec-head h2 { margin: 0; }
.sec-more { font-size: var(--text-sm); font-weight: 700; }
.sec-intro { max-width: var(--measure); color: var(--color-text-muted); }
.sub-head { font-family: var(--font-body); font-size: var(--text-base); font-weight: 700; color: var(--color-text); margin: var(--space-6) 0 var(--space-4); }
.sec-head + .sub-head { margin-top: 0; }

/* entries: studies as contents entries, each topped by a hairline */
.entries { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(17rem, 1fr)); gap: var(--space-6) var(--space-6); }
.entry { border-top: 1px solid var(--color-line); padding-top: var(--space-4); height: 100%; display: flex; flex-direction: column; }
.entry h3 { font-size: var(--text-lg); margin-bottom: var(--space-2); }
.entry h3 a, .theme-entry h2 a, .theme-entry h3 a, .index-list h2 a, .index-list h3 a, .notes h3 a, .stream h2 a { color: var(--color-heading); text-decoration: none; }
.entry h3 a:hover, .theme-entry h2 a:hover, .theme-entry h3 a:hover, .index-list h2 a:hover, .index-list h3 a:hover, .notes h3 a:hover, .stream h2 a:hover { text-decoration: underline; text-decoration-thickness: 2px; }
.entry-text { margin-bottom: var(--space-3); }
.facts { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-1) var(--space-3); font-size: var(--text-sm); color: var(--color-text-muted); margin: 0 0 var(--space-2); }
.facts > * + *::before { content: ""; display: inline-block; width: 3px; height: 3px; margin-right: var(--space-3); vertical-align: middle; background: var(--color-line-strong); border-radius: 50%; }
.facts .status::before { display: none; }
.facts .ref { color: var(--color-text); }
.entry-group { font-size: var(--text-sm); margin: 0 0 var(--space-2); }
.entry-cta { margin: auto 0 0; padding-top: var(--space-1); }
@media (min-width: 1100px) {
  .entries.cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

/* home: the three ways in */
.ways { display: grid; gap: var(--space-5) var(--space-6); grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr)); margin-top: var(--section); }
.way { display: block; border-top: var(--rule-mid) solid var(--color-rule); padding-top: var(--space-4); color: var(--color-text); text-decoration: none; }
.way h2 { font-size: var(--text-xl); color: var(--color-heading); margin-bottom: var(--space-2); }
.way p { margin: 0; color: var(--color-text-muted); max-width: 34ch; }
.way:hover { color: var(--color-text); }
.way:hover h2 { text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: .15em; }

/* a lead paragraph in the serif */
.lead-prose > p:first-child { font-family: var(--font-heading); font-size: var(--text-md); line-height: 1.5; color: var(--color-text); }

/* themes list: plate and text side by side */
.themes-list { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 30rem), 1fr)); gap: var(--space-6) var(--space-7); }
.theme-entry { display: grid; grid-template-columns: minmax(0, 11rem) minmax(0, 1fr); gap: var(--space-5); border-top: 1px solid var(--color-line); padding-top: var(--space-4); align-items: start; }
.theme-entry:not(:has(.plate)) { grid-template-columns: minmax(0, 1fr); }
.theme-entry h2, .theme-entry h3 { font-size: var(--text-lg); margin-bottom: var(--space-2); }
.theme-entry p { margin-bottom: var(--space-2); }
.theme-entry .plate img { aspect-ratio: 4 / 3; }
@media (max-width: 600px) {
  .theme-entry { grid-template-columns: minmax(0, 6.5rem) minmax(0, 1fr); gap: var(--space-4); }
}

/* index lists: one row per group, title, summary and counts */
.index-list { list-style: none; margin: 0; padding: 0; }
.index-list > li { border-top: 1px solid var(--color-line); padding-block: var(--space-4); }
.index-list > li:last-child { border-bottom: 1px solid var(--color-line); }
.index-list h2, .index-list h3 { font-size: var(--text-lg); margin-bottom: var(--space-2); }
.index-list p { margin-bottom: var(--space-2); }
.index-list .facts { margin: 0; }
@media (min-width: 821px) {
  .index-list > li { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.5fr) 11rem; gap: var(--space-6); align-items: baseline; }
  .index-list h2, .index-list h3, .index-list p { margin: 0; }
  .index-list .facts { justify-content: flex-end; }
}
.index-list.big h2 { font-size: var(--text-xl); }

/* people */
.people { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(15rem, 1fr)); gap: var(--space-5) var(--space-6); }
.people.full { grid-template-columns: repeat(auto-fill, minmax(min(100%, 22rem), 1fr)); gap: var(--space-6) var(--space-7); }
.person { display: flex; gap: var(--space-4); align-items: flex-start; border-top: 1px solid var(--color-line); padding-top: var(--space-4); height: 100%; }
.avatar { flex: none; width: 3.5rem; height: 3.5rem; border-radius: 50%; object-fit: cover; background: var(--avatar-bg); color: var(--avatar-text); display: grid; place-items: center; font-family: var(--font-heading); font-size: var(--text-md); }
.people.full .avatar { width: 5rem; height: 5rem; font-size: var(--text-lg); }
.person h3 { font-size: var(--text-md); margin-bottom: var(--space-1); }
.person h3 a { color: var(--color-heading); text-decoration: none; }
.person h3 a:hover { text-decoration: underline; }
.role { font-size: var(--text-sm); color: var(--color-text-muted); margin-bottom: var(--space-2); }
.bio { font-size: var(--text-sm); }
.bio p { margin-bottom: var(--space-2); }
.person .links { display: flex; gap: var(--space-4); font-size: var(--text-sm); font-weight: 700; margin: 0; }
.person .links a { display: inline-flex; align-items: center; min-height: var(--tap); }

/* notes: dated news items in columns */
.notes { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(16rem, 1fr)); gap: var(--space-6); }
.notes > li { border-top: 1px solid var(--color-line); padding-top: var(--space-4); }
.notes time { display: block; font-size: var(--text-sm); font-weight: 700; color: var(--color-text-muted); margin-bottom: var(--space-2); }
.notes h3 { font-size: var(--text-md); margin-bottom: var(--space-2); }
.notes p { margin: 0; font-size: var(--text-sm); color: var(--color-text-muted); }

/* the news stream */
.stream { list-style: none; margin: var(--space-5) 0 0; padding: 0; border-top: var(--rule-heavy) solid var(--color-rule); }
.stream > li { border-bottom: 1px solid var(--color-line); padding-block: var(--space-5); display: grid; gap: var(--space-2) var(--space-6); }
.stream-date { margin: 0; font-size: var(--text-sm); display: flex; flex-direction: column; color: var(--color-text-muted); }
.stream-date time { font-weight: 700; color: var(--color-text); }
.stream h2 { font-size: var(--text-lg); margin-bottom: var(--space-2); }
.stream p { margin: 0; max-width: var(--measure); }
@media (min-width: 821px) {
  .stream > li { grid-template-columns: 12rem minmax(0, 1fr); }
}

/* contents line ("On this page", "Studies by status") */
.jump { display: flex; flex-wrap: wrap; align-items: center; gap: 0 var(--space-5); padding-block: var(--space-2); margin-bottom: var(--space-6); border-block: 1px solid var(--color-line); font-size: var(--text-sm); }
.jump-label { margin: 0; color: var(--color-text-muted); }
.jump ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0 var(--space-5); }
.jump a { display: inline-flex; align-items: center; min-height: var(--tap); font-weight: 700; }

/* explore by theme / by group */
.switch { display: flex; gap: var(--space-5); margin: 0 0 var(--space-6); border-bottom: 1px solid var(--color-line); font-size: var(--text-sm); }
.switch a { display: inline-flex; align-items: center; min-height: var(--tap); font-weight: 700; color: var(--color-text-muted); text-decoration: none; box-shadow: inset 0 -3px 0 transparent; }
.switch a:hover { color: var(--color-link); box-shadow: inset 0 -3px 0 var(--nav-hover-bar); }
.switch a[aria-current] { color: var(--color-text); box-shadow: inset 0 -3px 0 var(--nav-current-bar); }

/* tags and chip rows */
.chip-row { margin-top: var(--space-5); }
.chip-label { font-size: var(--text-sm); color: var(--color-text-muted); margin-bottom: var(--space-2); }
.tags { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: var(--space-2); }
.tags a { display: inline-flex; align-items: center; min-height: var(--tap); padding: 0 var(--space-3); border: 1px solid var(--color-line-strong); border-radius: var(--radius-sm); font-size: var(--text-sm); font-weight: 600; color: var(--color-tag-text); text-decoration: none; }
.tags a:hover { border-color: var(--color-rule); background: var(--color-surface-tint); }

/* reading text */
.prose { max-width: var(--measure); }
.prose h2 { font-size: var(--text-lg); color: var(--color-heading); margin-top: var(--space-6); margin-bottom: var(--space-2); }
.prose > h2:first-child { margin-top: 0; }
.prose h3 { font-size: var(--text-md); margin-top: var(--space-5); }
.prose ul, .prose ol { padding-left: 1.25rem; margin: 0 0 var(--space-4); }
.prose li { margin-bottom: var(--space-1); }
.intro { padding-top: var(--space-2); }
.page-body { padding-top: var(--space-2); }

/* feature (study pages, news posts): headline, then a body column and a fact box */
.feature-body { display: grid; gap: var(--space-7); }
.feature-body > * { border-top: var(--rule-mid) solid var(--color-rule); padding-top: var(--space-5); min-width: 0; }
@media (min-width: 921px) {
  .feature-body { grid-template-columns: minmax(0, 46rem) 19rem; justify-content: space-between; gap: var(--space-8); align-items: start; }
  .feature-main > .insert, .feature-main > .prose, .feature-main > .updates { max-width: none; }
  .factbox { position: sticky; top: calc(var(--header-pinned) + var(--space-4)); }
}
.post-prose { border-top: var(--rule-mid) solid var(--color-rule); padding-top: var(--space-5); }
.post-plate { margin-bottom: var(--space-5); }
.post-tags { max-width: var(--measure); }

/* the take-part insert: the magazine's boxed "how to" panel */
.insert { position: relative; background: var(--color-surface-tint); padding: var(--space-5) clamp(1.25rem, 3vw, 2rem) var(--space-5); margin-bottom: var(--space-7); max-width: var(--measure); }
.insert::before { content: ""; position: absolute; left: 0; right: 0; top: 0; height: var(--rule-heavy); background: var(--color-brand); transform-origin: left center; }
.insert h2 { font-size: var(--text-lg); color: var(--color-heading); margin: var(--space-2) 0 var(--space-3); }
.insert p { max-width: 58ch; }
.insert .btn-row { margin-top: var(--space-4); }
.take-part-text p:last-child { margin-bottom: var(--space-3); }
/* the one authored moment: arriving from "How to take part", the insert's rule draws across */
.insert:target::before { animation: rule-draw .7s var(--easing) both; }
@keyframes rule-draw { from { transform: scaleX(0); } to { transform: scaleX(1); } }
@media (prefers-reduced-motion: reduce) {
  .insert:target::before { animation: none; }
  .cta .arrow { transition: none; }
}
.notice { background: var(--notice-bg); color: var(--notice-text); border: 1px solid var(--notice-border); padding: var(--space-3) var(--space-4); font-size: var(--text-sm); }

/* updates: a dated list */
.updates { margin-top: var(--space-7); max-width: var(--measure); }
.updates h2 { font-size: var(--text-lg); color: var(--color-heading); margin-bottom: var(--space-3); }
.dated { list-style: none; margin: 0; padding: 0; }
.dated > li { display: grid; grid-template-columns: 9.5rem minmax(0, 1fr); gap: var(--space-4); border-top: 1px solid var(--color-line); padding-block: var(--space-3); }
.dated time { font-size: var(--text-sm); font-weight: 700; padding-top: .15em; }
.update-text { min-width: 0; }
@media (max-width: 600px) {
  .dated > li { grid-template-columns: minmax(0, 1fr); gap: var(--space-1); }
}

/* the fact box */
.factbox .plate { margin-bottom: var(--space-5); }
.factbox-title { font-size: var(--text-md); color: var(--color-text); margin-bottom: var(--space-3); }
.factbox dl { margin: 0; font-size: var(--text-sm); }
.factbox dt { font-weight: 700; color: var(--color-text-muted); margin-top: var(--space-3); padding-top: var(--space-3); border-top: 1px solid var(--color-line); }
.factbox dt:first-child { margin-top: 0; }
.factbox dd { margin: var(--space-1) 0 0; overflow-wrap: anywhere; }
.plain-list, .docs { list-style: none; margin: 0; padding: 0; }
.plain-list li, .docs li { margin-bottom: var(--space-1); }
.docs a { font-weight: 700; }
.docs small { display: block; color: var(--color-text-muted); }

/* publications */
.papers { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 22rem), 1fr)); gap: var(--space-6) var(--space-7); }
.paper { border-top: 1px solid var(--color-line); padding-top: var(--space-4); }
.paper h3 { font-size: var(--text-md); margin-bottom: var(--space-2); }
.cite { font-size: var(--text-sm); color: var(--color-text-muted); }
.plain { background: var(--color-surface-alt); padding: var(--space-3) var(--space-4); font-size: var(--text-sm); }
.plain p { margin: 0; }
.plain-label { font-weight: 700; margin-bottom: var(--space-1) !important; }
.pub-list { max-width: 60rem; }
.pub-year-block { display: grid; grid-template-columns: 5.5rem minmax(0, 1fr); gap: var(--space-5); border-top: 1px solid var(--color-line); padding-top: var(--space-3); }
.pub-year { font-size: var(--text-lg); color: var(--color-text); margin: 0; }
.pubs { list-style: none; margin: 0; padding: 0; }
.pubs li { margin-bottom: var(--space-4); }
.pubs .t { display: block; font-weight: 600; }
.pubs small { display: block; font-size: var(--text-sm); color: var(--color-text-muted); overflow-wrap: anywhere; }
.pub-source { font-size: var(--text-sm); color: var(--color-text-muted); margin-top: var(--space-4); }
@media (max-width: 600px) {
  .pub-year-block { grid-template-columns: minmax(0, 1fr); gap: var(--space-2); }
}

/* optional text and image blocks on a page entry */
.blocks { margin-top: var(--space-7); display: grid; gap: var(--space-7); }
.text-image { display: grid; gap: var(--space-5); align-items: center; grid-template-columns: minmax(0, 1fr); }
.block-figure { margin: 0; background: var(--art-bg); isolation: isolate; overflow: hidden; }
.block-figure img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; }
.block-figure img.placeholder { mix-blend-mode: var(--art-blend); }
@media (min-width: 821px) {
  .text-image:not(.text-only) { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: var(--space-7); }
  .text-image.image-left .block-figure { order: -1; }
}

/* footer: the colophon */
.site-footer { background: var(--footer-bg); color: var(--color-text-on-inverse); margin-top: auto; font-size: var(--text-sm); }
.footer-cols { display: grid; gap: var(--space-6); grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr)); padding-block: var(--space-7) var(--space-6); }
.site-footer h2 { font-size: var(--text-md); color: var(--color-text-on-inverse); margin-bottom: var(--space-3); }
.site-footer p { color: var(--color-text-on-inverse-muted); margin-bottom: var(--space-2); }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin-bottom: var(--space-1); }
.site-footer a { color: var(--color-text-on-inverse); display: inline-flex; align-items: center; min-height: 32px; }
.site-footer a:hover { color: var(--color-accent-on-inverse); }
.footer-bottom { border-top: 1px solid color-mix(in srgb, var(--color-text-on-inverse) 22%, var(--footer-bg)); }
.footer-bottom-inner { display: flex; justify-content: space-between; align-items: center; gap: var(--space-4); padding-block: var(--space-4); }
.footer-bottom p { margin: 0; }
.footer-logo { height: 40px; width: auto; }