/* Maxwell Elliott — site styles.
   The world: a Lexis plate. Plate ground, ink, and one ink per study. */

:root {
  --plate: #EEF0EC;
  --plate-deep: #E2E5DF;
  --ink: #16181B;
  --ink-2: #464B51;
  --hair: rgba(22, 24, 27, 0.16);
  --hair-strong: rgba(22, 24, 27, 0.32);

  --dunedin: #D19A2A;   /* ochre */
  --ukb: #173A63;       /* Prussian blue */
  --adni: #2E7D6B;      /* viridian */

  --link: #173A63;
  --header-h: 4.5rem;
  --gutter: clamp(1rem, 3.9vw, 3.5rem);

  --sans: "Atkinson Hyperlegible Next", "Atkinson Hyperlegible", system-ui, sans-serif;
  --mono: "Atkinson Hyperlegible Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

  --grid-line: rgba(22, 24, 27, 0.07);
  --on-accent: #16181B;

  color-scheme: light;
}

/* Dark theme: follows the system unless the visitor picked light, or picked dark explicitly. */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --plate: #14171A;
    --plate-deep: #1D2125;
    --ink: #E7E9E4;
    --ink-2: #A9AFB5;
    --hair: rgba(231, 233, 228, 0.16);
    --hair-strong: rgba(231, 233, 228, 0.32);
    --dunedin: #D9A43A;
    --ukb: #5B8BC4;
    --adni: #4FAE93;
    --link: #9CC0EE;
    --grid-line: rgba(231, 233, 228, 0.07);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --plate: #14171A;
  --plate-deep: #1D2125;
  --ink: #E7E9E4;
  --ink-2: #A9AFB5;
  --hair: rgba(231, 233, 228, 0.16);
  --hair-strong: rgba(231, 233, 228, 0.32);
  --dunedin: #D9A43A;
  --ukb: #5B8BC4;
  --adni: #4FAE93;
  --link: #9CC0EE;
  --grid-line: rgba(231, 233, 228, 0.07);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: calc(var(--header-h) + 1rem);
  scrollbar-color: var(--hair-strong) var(--plate);
}

body {
  margin: 0;
  background: var(--plate);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.55;
  font-variant-numeric: tabular-nums;
}

::selection { background: var(--dunedin); color: var(--on-accent); }

h1, h2, h3, p, ul, ol, figure, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg { display: block; max-width: 100%; }

a {
  color: var(--link);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}
a:hover { text-decoration-thickness: 2px; }

:focus-visible {
  outline: 2px solid var(--ukb);
  outline-offset: 3px;
}

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  overflow: hidden; clip: rect(0 0 0 0); clip-path: inset(50%);
  white-space: nowrap;
}

.skip {
  position: absolute; left: var(--gutter); top: -4rem;
  background: var(--ink); color: var(--plate);
  padding: 0.6rem 1rem; z-index: 50;
}
.skip:focus { top: 0.75rem; }

.icon { width: 1em; height: 1em; flex: none; display: inline-block; vertical-align: -0.12em; }

/* ---------- header ---------- */

.site-header {
  position: sticky; top: 0; z-index: 20;
  height: var(--header-h);
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: 0 var(--gutter);
  background: var(--plate);
  border-bottom: 2px solid var(--ink);
}
/* second rule under the header, as on a plate's frame */
.site-header::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -7px;
  height: 5px; pointer-events: none;
  background: linear-gradient(var(--plate) 0 4px, var(--ink) 4px 5px);
}

.site-name {
  font-size: 1.375rem; font-weight: 750; letter-spacing: -0.012em; white-space: nowrap;
  color: var(--ink); text-decoration: none;
  transition: color 0.2s var(--ease-out);
}
.site-name:hover { color: var(--ukb); }

.site-nav ul { display: flex; align-items: center; gap: clamp(0.9rem, 2.2vw, 2rem); }
.site-nav a {
  display: inline-flex; align-items: center; gap: 0.3em;
  color: var(--ink); text-decoration: none;
  font-weight: 600; font-size: 1.0625rem;
  padding: 0.35rem 0;
  background: linear-gradient(var(--ink), var(--ink)) left bottom / 0 2px no-repeat;
  transition: background-size 0.35s var(--ease-out), color 0.2s var(--ease-out);
}
.site-nav a:hover { background-size: 100% 2px; }
.site-nav a[aria-current="page"] {
  background-image: linear-gradient(var(--dunedin), var(--dunedin));
  background-size: 100% 3px;
}

/* theme switch */
.theme-toggle {
  display: inline-grid; place-items: center;
  width: 2.5rem; height: 2.5rem;
  background: none; color: var(--ink); cursor: pointer;
  border: 1.5px solid var(--hair-strong);
  transition: border-color 0.2s var(--ease-out), background-color 0.25s var(--ease-out), color 0.25s var(--ease-out);
}
.theme-toggle:hover { border-color: var(--ink); background: var(--ink); color: var(--plate); }
.theme-toggle svg { width: 1.15rem; height: 1.15rem; grid-area: 1 / 1; transition: opacity 0.3s var(--ease-out), transform 0.45s var(--ease-out); }
.theme-toggle .i-sun { opacity: 0; transform: rotate(-60deg) scale(0.6); }
:root[data-theme-active="dark"] .theme-toggle .i-moon { opacity: 0; transform: rotate(60deg) scale(0.6); }
:root[data-theme-active="dark"] .theme-toggle .i-sun { opacity: 1; transform: none; }

body, .site-header, .ruled, .plate__toggle button {
  transition: background-color 0.3s var(--ease-out), color 0.3s var(--ease-out);
}
/* the nav and theme switch; on phones they fold behind the menu button */
.site-menu { display: flex; align-items: center; gap: clamp(0.9rem, 2.2vw, 2rem); }
.site-tools { display: flex; align-items: center; }

.menu-toggle {
  display: none; place-items: center;
  width: 2.5rem; height: 2.5rem;
  background: none; color: var(--ink); cursor: pointer;
  border: 1.5px solid var(--ink);
  transition: background-color 0.25s var(--ease-out), color 0.25s var(--ease-out);
}
.menu-toggle:hover, .menu-toggle[aria-expanded="true"] { background: var(--ink); color: var(--plate); }
.menu-toggle svg { width: 1.15rem; height: 1.15rem; overflow: visible; }
.menu-toggle path {
  fill: none; stroke: currentColor; stroke-width: 1.7;
  transform-origin: 10px 10px;
  transition: transform 0.4s var(--ease-out), opacity 0.2s var(--ease-out);
}
/* the three bars close into an X */
.menu-toggle[aria-expanded="true"] .m1 { transform: rotate(45deg) translateY(4.5px); }
.menu-toggle[aria-expanded="true"] .m2 { opacity: 0; }
.menu-toggle[aria-expanded="true"] .m3 { transform: rotate(-45deg) translateY(-4.5px); }

/* ---------- shared plate furniture ---------- */

/* the double-ruled box of an atlas title block or legend */
.ruled {
  border: 2px solid var(--ink);
  box-shadow: inset 0 0 0 4px var(--plate), inset 0 0 0 5px var(--ink);
  background: var(--plate);
}

.mono { font-family: var(--mono); }

.button {
  display: inline-flex; align-items: center; gap: 0.55em;
  background: var(--ink); color: var(--plate);
  font-weight: 700; font-size: 1.0625rem; line-height: 1.2;
  text-decoration: none;
  padding: 0.85rem 1.2rem;
  border: 2px solid var(--ink);
  transition: background-color 0.25s var(--ease-out), color 0.25s var(--ease-out);
}
.button:hover { background: var(--ukb); border-color: var(--ukb); }
.button .icon { transition: transform 0.35s var(--ease-out); }
.button:hover .icon { transform: translateX(3px); }

.button--quiet { background: transparent; color: var(--ink); }
.button--quiet:hover { background: var(--ink); color: var(--plate); border-color: var(--ink); }

.arrow-link {
  display: inline-flex; align-items: center; gap: 0.4em;
  font-weight: 700; text-decoration: none;
}
.arrow-link:hover { text-decoration: underline; }

/* key swatches, as in a plate legend */
.key {
  display: inline-block; width: 2.1rem; height: 0.95rem; flex: none;
  border: 1px solid var(--ink);
}
.key--dunedin { background: var(--dunedin); }
.key--ukb { background: var(--ukb); }
.key--adni {
  background: repeating-linear-gradient(-52deg, var(--adni) 0 2.5px, transparent 2.5px 6.5px), var(--plate);
}
.key--life { background: linear-gradient(var(--ink), var(--ink)) center / 100% 2px no-repeat, var(--plate); }
.key--midlife { background: rgba(209, 154, 42, 0.2); border-style: dashed; }

/* ---------- home: the plate and its notes ---------- */

.lexis {
  display: grid;
  grid-template-columns: minmax(20rem, 34rem) minmax(0, 1fr);
  column-gap: clamp(2rem, 4vw, 4rem);
  padding: 0 var(--gutter);
}

.lexis__notes { grid-column: 1; padding-bottom: 20vh; }

.title-block {
  margin-top: clamp(1.5rem, 4.5vh, 3rem);
  padding: clamp(1.4rem, 2.6vw, 2.2rem);
}
.title-block h1 {
  font-size: clamp(2.2rem, 3.5vw, 3.45rem);
  line-height: 1.03;
  letter-spacing: -0.028em;
  font-weight: 750;
  text-wrap: balance;
}
.credit {
  margin-top: 1.25rem; padding-top: 0.9rem;
  border-top: 1px solid var(--hair-strong);
  font-weight: 700; font-size: 1.0625rem; line-height: 1.35;
}
.credit span { display: block; font-weight: 400; color: var(--ink-2); }
.title-block .lede { margin-top: 0.9rem; max-width: 34em; }
.title-block .mobile-cta { display: none; }

.step {
  min-height: 78vh;
  display: flex; flex-direction: column; justify-content: center;
  padding: 3rem 0;
}
.step--first { min-height: calc(100vh - var(--header-h)); justify-content: flex-start; padding: 0; }
.step--opens { padding-top: 6rem; }

.step h2 {
  font-size: clamp(2rem, 3vw, 2.75rem);
  line-height: 1.05; letter-spacing: -0.025em; font-weight: 750;
  margin-bottom: 1.6rem;
}
.step__entry {
  border-top: 2px solid var(--ink);
  padding-top: 1rem;
  max-width: 32rem;
}
.step__entry header { display: flex; align-items: center; gap: 0.8rem; margin-bottom: 0.7rem; }
.step__entry h3 { font-size: 1.5rem; line-height: 1.15; letter-spacing: -0.012em; font-weight: 750; }
.step__entry p + p { margin-top: 0.7rem; }
.step .lead { font-size: 1.1875rem; max-width: 30rem; margin-bottom: 2rem; }

.cite {
  display: block; margin-top: 1rem; padding-top: 0.7rem;
  border-top: 1px solid var(--hair);
  font-size: 0.9375rem; line-height: 1.4;
}
.cite a { font-weight: 600; }
.cite .mono { display: block; margin-top: 0.2rem; color: var(--ink-2); font-size: 0.8125rem; }

/* the sticky plate */
.plate {
  grid-column: 2; grid-row: 1;
  position: sticky; top: var(--header-h);
  align-self: start;
  height: calc(100vh - var(--header-h));
  display: flex; flex-direction: column; justify-content: center;
  padding: 1.25rem 0 1rem;
}
.plate__frame { position: relative; flex: 1; min-height: 0; display: flex; align-items: center; }
.plate__svg { width: 100%; height: 100%; max-height: 100%; overflow: visible; }
.plate__caption {
  font-size: 0.8125rem; color: var(--ink-2); line-height: 1.4;
  padding-top: 0.6rem; border-top: 1px solid var(--hair);
}

/* svg furniture */
.plate__svg text { font-family: var(--mono); fill: var(--ink); }
.grid line { stroke: var(--ink); stroke-opacity: 0.09; stroke-width: 1; }
.grid line.major { stroke-opacity: 0.16; }
.diagonals line { stroke: var(--ink); stroke-opacity: 0.11; stroke-width: 1; stroke-dasharray: 2 5; }
.diag-labels text { font-size: 13px; fill-opacity: 0.55; }
.axis text { font-size: 15px; }
.axis .axis-name { font-family: var(--sans); font-size: 14px; fill: var(--ink-2); }
.frame { stroke: var(--ink); stroke-width: 2; }

.band polygon { stroke: var(--ink); stroke-width: 1.2; }
.band--dunedin polygon { fill: var(--dunedin); }
.band--ukb polygon { fill: var(--ukb); }
.band--adni polygon { fill: url(#hatch-adni); stroke: var(--adni); stroke-width: 2; }
.hatch-line { stroke: var(--adni); stroke-width: 3; }
.band-label { font-family: var(--sans) !important; font-weight: 750; font-size: 19px; letter-spacing: 0.01em; }
.band--ukb .band-label { fill: var(--plate); }
.band--adni .band-label { fill: var(--adni); paint-order: stroke; stroke: var(--plate); stroke-width: 5px; }
.band--dunedin .band-label { fill: var(--on-accent); }
.phase { fill: var(--on-accent); }
.note { font-size: 14px; }
.now line { stroke: var(--ink); stroke-width: 1.2; stroke-dasharray: 5 4; }
.now text { font-size: 14px; }

.midlife rect { fill: var(--dunedin); fill-opacity: 0.2; stroke: var(--ink); stroke-width: 1; stroke-dasharray: 6 4; }
.midlife text { font-family: var(--sans) !important; font-weight: 700; font-size: 17px; }
.life line { stroke: var(--ink); stroke-width: 2.4; }
.life circle { fill: var(--plate); stroke: var(--ink); stroke-width: 2.4; }

.inset-title { font-family: var(--sans) !important; font-size: 30px; font-weight: 750; letter-spacing: -0.01em; }
.inset-note { font-size: 16px; fill: var(--ink-2) !important; }
.inset-label { font-family: var(--sans) !important; font-size: 18px; font-weight: 600; }
.axis-sm { font-size: 15px; }
.tick { stroke: var(--ink); stroke-width: 1.5; }
.whisker { stroke: var(--ink); stroke-width: 2; }
.dot { fill: var(--ukb); fill-opacity: 0.55; }
.dot-solid { fill: var(--plate); stroke: var(--ink); stroke-width: 3; }
.mean { stroke: var(--ink); stroke-width: 5; }
.ci { stroke: var(--ink); stroke-width: 2; }
.slope line { stroke: var(--dunedin); stroke-width: 4; }
.pace line { stroke: var(--ink); stroke-width: 2.5; stroke-dasharray: 9 7; }
.arrow { fill: var(--ink); }

/* states. Default (no JS): the full plate, no inset. */
.population, .inset, .band, .midlife, .life,
.inset .single, .inset .c1, .inset .c2, .inset .slope, .inset .pace {
  transition: opacity 0.6s var(--ease-out);
}
.population { transition: opacity 0.5s var(--ease-out); }
.inset {
  opacity: 0;
  transition: opacity 0.5s var(--ease-out);
  pointer-events: none;
}
.midlife, .life { opacity: 0; }
.inset .single, .inset .c1, .inset .c2, .inset .slope, .inset .pace { opacity: 0; }

.plate[data-state="dunedin"] .band:not(.band--dunedin),
.plate[data-state="ukb"] .band:not(.band--ukb),
.plate[data-state="adni"] .band:not(.band--adni) { opacity: 0.16; }

.plate[data-state="windows"] .midlife { opacity: 1; }
.plate[data-state="windows"] .band { opacity: 0.55; }

.plate[data-zoom] .life { opacity: 1; transition-duration: 0.2s; }
.plate[data-zoom] .population { opacity: 0; }
.plate[data-zoom] .inset { opacity: 1; transition-delay: 0.2s; }
.plate[data-state="scan"] .single,
.plate[data-state="cluster"] .c1,
.plate[data-state="year"] .c1,
.plate[data-state="year"] .c2,
.plate[data-state="year"] .slope,
.plate[data-state="pace"] .single,
.plate[data-state="pace"] .pace { opacity: 1; }
.plate[data-state="cluster"] .single { opacity: 0.22; }

/* phone-only view switch under the plate */
.plate__toggle { display: none; margin-top: 0.75rem; border: 2px solid var(--ink); }
.plate__toggle button {
  flex: 1; font: inherit; font-weight: 700; font-size: 0.9375rem;
  padding: 0.7rem 0.5rem; min-height: 2.75rem;
  background: var(--plate); color: var(--ink); border: 0; cursor: pointer;
  transition: background-color 0.25s var(--ease-out), color 0.25s var(--ease-out);
}
.plate__toggle button + button { border-left: 2px solid var(--ink); }
.plate__toggle button[aria-pressed="true"] { background: var(--ink); color: var(--plate); }

/* the legend, set into the plate's empty lower right */
.legend {
  position: absolute; left: 9%; top: 4%;
  width: min(19rem, 42%);
  padding: 1rem 1.1rem 1.1rem;
  transition: opacity 0.4s var(--ease-out), visibility 0.4s;
}
.legend h2 { font-size: 0.8125rem; font-family: var(--mono); font-weight: 600; letter-spacing: 0.02em; margin-bottom: 0.55rem; }
.legend ul { display: grid; gap: 0.4rem; margin-bottom: 0.95rem; }
.legend li { display: flex; align-items: center; gap: 0.65rem; font-weight: 600; font-size: 0.9375rem; line-height: 1.2; }
.legend .button { width: 100%; justify-content: space-between; font-size: 1rem; padding: 0.75rem 0.95rem; }
.plate[data-zoom] .legend { opacity: 0; visibility: hidden; }

/* ---------- sections after the plate ---------- */

.section {
  padding: clamp(4rem, 9vw, 7.5rem) var(--gutter);
  border-top: 2px solid var(--ink);
}
.section__head {
  display: flex; align-items: baseline; justify-content: space-between; gap: 1rem 2rem;
  flex-wrap: wrap;
  margin-bottom: 2.25rem;
}
.section h2 {
  font-size: clamp(2rem, 3.4vw, 3rem);
  line-height: 1.04; letter-spacing: -0.026em; font-weight: 750;
}

/* papers, set as a year axis */
.paper-list { border-top: 1px solid var(--hair-strong); }
.paper {
  display: grid;
  grid-template-columns: 5.5rem minmax(0, 1fr) minmax(12rem, 17.5rem);
  gap: 0.4rem 2rem;
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--hair-strong);
  align-items: baseline;
}
.paper__year { font-family: var(--mono); font-size: 0.9375rem; color: var(--ink-2); }
.paper__title { font-size: 1.1875rem; line-height: 1.3; font-weight: 650; max-width: 46em; }
.paper__title a { color: var(--ink); text-decoration-color: var(--hair-strong); }
.paper__title a:hover { color: var(--ukb); text-decoration-color: currentColor; }
.paper__venue { font-size: 0.9375rem; line-height: 1.35; }
.paper__venue i { font-style: italic; }
.paper__venue .mono { display: block; color: var(--ink-2); font-size: 0.75rem; margin-top: 0.15rem; overflow-wrap: anywhere; }

/* join */
.join {
  display: grid;
  grid-template-columns: minmax(0, 46rem) minmax(16rem, 21rem);
  justify-content: start;
  gap: clamp(2rem, 6vw, 6rem);
  align-items: start;
}
.join .intro { max-width: 36rem; font-size: 1.1875rem; margin-bottom: 2rem; }
.positions { display: grid; gap: 0; border-top: 2px solid var(--ink); max-width: 44rem; }
.position {
  display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 0.35rem 1.5rem;
  padding: 1.25rem 0; border-bottom: 1px solid var(--hair-strong);
}
.position h3 { font-size: 1.375rem; letter-spacing: -0.01em; line-height: 1.2; }
.position p { grid-column: 1; max-width: 38rem; }
.position p + p { margin-top: 0.4rem; }

/* status: change data-status to "filled" (and the word) when a position closes */
.status {
  grid-column: 2; grid-row: 1;
  display: inline-flex; align-items: center; gap: 0.45rem;
  font-family: var(--mono); font-size: 0.875rem; font-weight: 600;
  padding: 0.25rem 0.6rem; border: 1.5px solid var(--ink);
  align-self: start;
}
.status::before { content: ""; width: 0.6rem; height: 0.6rem; border-radius: 50%; background: var(--adni); }
.status[data-status="filled"] { color: var(--ink-2); border-color: var(--hair-strong); }
.status[data-status="filled"]::before { background: transparent; border: 1.5px solid var(--ink-2); }

.actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 2rem; }

.portrait { padding: 0.75rem; }
.portrait img { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; background: var(--plate-deep); filter: grayscale(0.15); }
.portrait figcaption { font-size: 0.875rem; margin-top: 0.6rem; line-height: 1.35; }
.portrait figcaption b { display: block; font-size: 1rem; }

/* ---------- inner pages ---------- */

.page-head {
  padding: clamp(2rem, 5vw, 4rem) var(--gutter) clamp(2.5rem, 5vw, 4rem);
  background:
    linear-gradient(var(--grid-line) 1px, transparent 1px) 0 0 / 100% 3rem,
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px) 0 0 / 3rem 100%,
    var(--plate);
  border-bottom: 2px solid var(--ink);
}
.page-head .title-block { margin: 0; max-width: 46rem; }
.page-head .title-block p { margin-top: 0.9rem; max-width: 38rem; }

/* Page head with a full-bleed photo behind the title box (Join page). */
.page-head--photo {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  min-height: clamp(24rem, 46vw, 40rem);
  display: flex;
  align-items: flex-end;
  padding-bottom: clamp(2.75rem, 5vw, 4rem);
  background: #0b0d10;
}
.page-head__photo { position: absolute; inset: 0; z-index: -1; width: 100%; height: 100%; object-fit: cover; object-position: 50% 35%; }
.photo-credit {
  position: absolute; right: var(--gutter); bottom: 0.6rem;
  font-size: 0.75rem; line-height: 1.3; color: #E7E9E4;
  background: rgba(11, 13, 16, 0.6); padding: 0.15rem 0.5rem;
}
.photo-credit a { color: inherit; }
@media (max-width: 640px) {
  /* Phones: photo as a band on top, title box below it. */
  .page-head--photo { display: block; min-height: 0; padding-top: 0; background: var(--plate); }
  .page-head__photo { position: static; display: block; width: calc(100% + 2 * var(--gutter)); max-width: none; height: auto; aspect-ratio: 4 / 3; margin: 0 calc(-1 * var(--gutter)); object-position: 45% 50%; }
  .photo-credit { position: static; margin: 0.4rem 0 0; padding: 0; background: none; color: var(--ink-2); }
}

.page-body { padding: clamp(2.5rem, 6vw, 5rem) var(--gutter) clamp(4rem, 8vw, 6rem); }

/* publications page */
.year-axis { margin-top: 1.5rem; }
.year-axis svg { width: 100%; height: auto; overflow: visible; }
.year-axis text { font-family: var(--mono); font-size: 12px; fill: var(--ink); }
.year-axis .bar { fill: var(--ukb); }
.year-axis .bar-link:hover .bar, .year-axis .bar-link:focus-visible .bar { fill: var(--dunedin); }
.year-axis .base { stroke: var(--ink); stroke-width: 2; }

.year-group {
  display: grid; grid-template-columns: 5.5rem minmax(0, 1fr); gap: 0 2rem;
  border-top: 2px solid var(--ink);
  padding: 1rem 0 1.75rem;
}
.year-group h2 { font-family: var(--mono); font-size: 1.375rem; font-weight: 600; line-height: 1.6; letter-spacing: 0; }
.year-group .paper { grid-template-columns: minmax(0, 1fr) minmax(12rem, 17.5rem); }
.year-group .paper:last-child { border-bottom: 0; }
.year-group .paper-list { border-top: 0; }
.year-group .paper:first-child { padding-top: 0.35rem; }

/* Altmetric score under a paper's venue (added by site.js). Altmetric's inline styles are overridden to fit the type. */
.paper__altmetric { display: block; margin-top: 0.45rem; }
.paper__altmetric:empty, .paper__altmetric[style*="none"] { display: none; }
.paper__altmetric a { display: inline-flex !important; align-items: center; gap: 0.45rem; text-decoration: none; color: var(--ink-2); }
.paper__altmetric img { width: 1.25rem !important; height: 1.25rem !important; border-radius: 50%; }
.paper__altmetric-label { font-family: var(--mono); font-size: 0.75rem; font-weight: 600; text-decoration: underline; text-decoration-color: var(--hair-strong); text-underline-offset: 0.2em; }
.paper__altmetric a:hover .paper__altmetric-label { color: var(--ukb); text-decoration-color: currentColor; }

.source-note { font-size: 0.9375rem; color: var(--ink-2); max-width: 44rem; margin-top: 2rem; }

/* people page. Without JS every group shows in turn; site.js turns them into tabs. */
.people, .people + .page-foot { max-width: 64rem; }

.people__tabs {
  display: flex; flex-wrap: wrap; gap: 2px;
  background: var(--ink);
  border: 2px solid var(--ink);
  margin-bottom: clamp(2rem, 4vw, 3rem);
}
.people__tabs[hidden] { display: none; }
.people__tabs li { flex: 1 1 auto; display: flex; }
.people__tabs a {
  flex: 1; display: flex; align-items: center; justify-content: center; gap: 0.55rem;
  min-height: 2.75rem; padding: 0.8rem 1rem;
  background: var(--plate); color: var(--ink);
  font-weight: 700; font-size: 1rem; line-height: 1.2;
  text-decoration: none; white-space: nowrap;
  transition: background-color 0.25s var(--ease-out), color 0.25s var(--ease-out);
}
.people__tabs a:hover { background: var(--plate-deep); }
.people__tabs a[aria-selected="true"] {
  background: var(--ink); color: var(--plate);
  box-shadow: inset 0 -4px 0 var(--dunedin);
}
.people__tabs a:focus-visible { outline-offset: -6px; }
.people__tabs a[aria-selected="true"]:focus-visible { outline-color: var(--plate); }
.people__tabs .mono { font-size: 0.8125rem; font-weight: 600; color: var(--ink-2); }
.people__tabs a[aria-selected="true"] .mono { color: inherit; opacity: 0.7; }

.people__group + .people__group { margin-top: clamp(3rem, 6vw, 4.5rem); }
.people__group > h2 {
  font-size: clamp(1.6rem, 2.6vw, 2.25rem);
  line-height: 1.05; letter-spacing: -0.022em; font-weight: 750;
  margin-bottom: 1.25rem;
}
.people__group:focus-visible { outline-offset: 6px; }
/* as tabs, the selected tab names the group */
.people[data-tabs] .people__group + .people__group { margin-top: 0; }
.people[data-tabs] .people__group > h2 {
  position: absolute; width: 1px; height: 1px;
  overflow: hidden; clip: rect(0 0 0 0); clip-path: inset(50%);
  white-space: nowrap;
}

.person {
  display: grid;
  grid-template-columns: minmax(9rem, 13rem) minmax(0, 40rem);
  gap: 1.25rem clamp(1.5rem, 4vw, 3rem);
  align-items: start;
  padding: clamp(1.5rem, 3vw, 2.25rem) 0;
  border-bottom: 1px solid var(--hair-strong);
}
.person:first-of-type { border-top: 2px solid var(--ink); }
.person--lead { grid-template-columns: minmax(12rem, 20rem) minmax(0, 40rem); }

.person__photo { padding: 0.6rem; }
.person__photo img {
  width: 100%; aspect-ratio: 4 / 5; object-fit: cover;
  background: var(--plate-deep); filter: grayscale(0.15);
}
/* no photo yet: initials on graph paper */
.person__photo--initials span {
  display: grid; place-items: center; aspect-ratio: 4 / 5;
  background:
    linear-gradient(var(--grid-line) 1px, transparent 1px) 0 0 / 100% 1.5rem,
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px) 0 0 / 1.5rem 100%,
    var(--plate-deep);
  font-family: var(--mono); font-weight: 600; letter-spacing: 0.04em;
  font-size: clamp(1.6rem, 3vw, 2.4rem); color: var(--ink-2);
}

.person__text h3 { font-size: 1.5rem; line-height: 1.15; letter-spacing: -0.012em; font-weight: 750; }
.person--lead .person__text h3 { font-size: clamp(1.75rem, 2.6vw, 2.25rem); letter-spacing: -0.02em; }
.person__role { margin-top: 0.35rem; font-size: 0.875rem; line-height: 1.4; color: var(--ink-2); }
.person__links { display: flex; flex-wrap: wrap; gap: 0.5rem 1.25rem; margin-top: 0.9rem; }
.person__links a { display: inline-flex; align-items: center; gap: 0.35em; font-weight: 600; }
.person__links .icon { width: 0.8em; height: 0.8em; }
.person__text p { max-width: 38rem; }
.person__text p + p { margin-top: 0.7rem; }
.person__text .person__role + p,
.person__text .person__links + p { margin-top: 1rem; }

/* closing line under an inner page's list */
.page-foot {
  display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 1rem 2rem;
  margin-top: clamp(2.5rem, 5vw, 3.5rem); padding-top: 1.25rem;
  border-top: 2px solid var(--ink);
}

@media (max-width: 960px) {
  .person, .person--lead { grid-template-columns: minmax(7rem, 11rem) minmax(0, 1fr); }
}
@media (max-width: 640px) {
  .people__tabs a { font-size: 0.9375rem; padding: 0.7rem 0.75rem; }
  .person, .person--lead { grid-template-columns: 1fr; }
  .person__photo { width: min(10rem, 50%); }
  .person--lead .person__photo { width: min(13rem, 65%); }
  .person__text h3 { font-size: 1.375rem; }
}

/* news page: items by year, as on the papers page */
.news-item {
  display: grid;
  grid-template-columns: 4.5rem minmax(0, 1fr);
  gap: 0.25rem 1.5rem;
  align-items: baseline;
  padding: 0.35rem 0 1.5rem;
}
.news-item + .news-item { border-top: 1px solid var(--hair-strong); padding-top: 1.25rem; }
.news-item__date { font-family: var(--mono); font-size: 0.9375rem; color: var(--ink-2); white-space: nowrap; }
.news-item__title {
  font-size: clamp(1.3rem, 2vw, 1.625rem);
  line-height: 1.2; letter-spacing: -0.015em; font-weight: 750;
  max-width: 34em; text-wrap: balance;
}
.news-item__title a { color: var(--ink); text-decoration-color: var(--hair-strong); }
.news-item__title a:hover { color: var(--ukb); text-decoration-color: currentColor; }
.news-item__title .icon { width: 0.6em; height: 0.6em; margin-left: 0.3em; vertical-align: 0.05em; }
.news-item__body p { max-width: 40rem; margin-top: 0.75rem; }
.news-item__body .news-item__source { margin-top: 0.6rem; font-size: 0.875rem; color: var(--ink-2); }

@media (max-width: 640px) {
  .news-item { grid-template-columns: 1fr; }
}

/* ---------- footer ---------- */

.site-footer {
  border-top: 2px solid var(--ink);
  background: linear-gradient(var(--ink), var(--ink)) left 0 top 4px / 100% 1px no-repeat;
  padding: 2.5rem var(--gutter) 3rem;
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 2rem;
  font-size: 0.9375rem;
}
.site-footer h2 { font-size: 0.8125rem; font-family: var(--mono); font-weight: 600; margin-bottom: 0.6rem; color: var(--ink-2); }
.site-footer ul { display: grid; gap: 0.3rem; }
.link-list { gap: 0.5rem !important; }
.link-list a {
  display: inline-flex; align-items: center; gap: 0.6rem;
  color: var(--ink); text-decoration: none;
}
.link-list .icon {
  width: 1.05rem; height: 1.05rem; color: var(--ink-2);
  transition: color 0.2s var(--ease-out);
}
.link-list a:hover { color: var(--ukb); text-decoration: underline; text-underline-offset: 0.2em; }
.link-list a:hover .icon { color: var(--ukb); }
.site-footer .fine { color: var(--ink-2); font-size: 0.8125rem; margin-top: 0.75rem; }

/* ---------- small screens ---------- */

.footer-base {
  grid-column: 1 / -1;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  margin-top: 0.5rem; padding-top: 1.25rem;
  border-top: 1px solid var(--hair-strong);
  color: var(--ink-2); font-size: 0.875rem;
}
.back-top {
  display: inline-flex; align-items: center; gap: 0.45em;
  font-weight: 700; color: var(--ink); text-decoration: none;
  padding: 0.6rem 0.9rem; border: 1.5px solid var(--ink);
  transition: background-color 0.25s var(--ease-out), color 0.25s var(--ease-out);
}
.back-top .icon { transform: rotate(-90deg); transition: transform 0.35s var(--ease-out); }
.back-top:hover { background: var(--ink); color: var(--plate); }
.back-top:hover .icon { transform: rotate(-90deg) translateX(3px); }

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

@media (max-width: 960px) {
  :root { --header-h: 3.75rem; }
  .site-name { font-size: 1.1875rem; }
  .site-nav ul { gap: 0.9rem; }
  .site-nav a { font-size: 0.9375rem; }

  .lexis { display: flex; flex-direction: column; padding: 0; }
  .lexis__notes { display: contents; }
  .title-block-wrap { order: 1; padding: 0 var(--gutter) 1.25rem; }
  .plate {
    order: 2;
    position: static; height: auto;
    padding: 0.5rem var(--gutter) 0;
  }
  .plate__frame { flex: none; height: auto; aspect-ratio: 1000 / 960; }
  .plate__caption { display: block; margin-top: 0.75rem; }
  .plate__toggle { display: flex; }
  .steps { order: 3; padding: 0 var(--gutter) 2rem; }
  .lexis .step, .lexis .step.step--opens { min-height: 0; justify-content: flex-start; padding: 2.25rem 0 0; }
  .lexis .step.step--first { padding: 0; }

  .title-block .mobile-cta { display: inline-flex; margin-top: 1.25rem; }
  .legend { display: none; }

  .plate__svg text { font-size: 26px; }
  .axis text, .now text { font-size: 26px; }
  .diag-labels, .axis .axis-name, .note, .phase, .slope text { display: none; }
  .band-label { font-size: 30px; }
  .midlife text { font-size: 30px; }
  .inset-title { font-size: 40px; }
  .inset-note { font-size: 26px; }
  .inset-label { font-size: 30px; }
  .axis-sm { font-size: 26px; }

  .paper { grid-template-columns: 4rem minmax(0, 1fr); }
  .paper__venue { grid-column: 2; }
  .join { grid-template-columns: 1fr; }
  .portrait { max-width: 18rem; }
  .site-footer { grid-template-columns: 1fr; }
  .year-group { grid-template-columns: 1fr; }
  .year-group .paper { grid-template-columns: 1fr; }
  .year-group .paper__venue { grid-column: 1; }
}

@media (max-width: 480px) {
  .site-nav .label-long { display: none; }
  .position { grid-template-columns: 1fr; }
  .status { grid-column: 1; grid-row: auto; justify-self: start; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0.01ms !important; transition-delay: 0s !important; }
}

.position .h3-like { font-size: 1.375rem; letter-spacing: -0.01em; line-height: 1.2; }
.position p a { font-weight: 600; }
.position > h2, .position > h3 { grid-column: 1; grid-row: 1; align-self: center; }
@media (max-width: 480px) {
  .position > h2, .position > h3 { grid-row: auto; }
}
.position .status { grid-column: 2; grid-row: 1; }
@media (max-width: 480px) {
  .position .status { grid-column: 1; grid-row: auto; }
}

/* ---------- phones ---------- */
@media (max-width: 960px) {
  .lexis .step.step--first { min-height: 0; padding: 0; }
}

@media (max-width: 640px) {
  html, body { overflow-x: clip; }

  /* menu: a panel that drops from under the header's double rule */
  .js .menu-toggle { display: inline-grid; }
  .js .site-menu {
    position: absolute; left: 0; right: 0; top: calc(100% + 7px);
    flex-direction: column; align-items: stretch; gap: 0;
    max-height: calc(100dvh - var(--header-h) - 7px); overflow-y: auto;
    padding: 0.25rem var(--gutter) 1.25rem;
    background: var(--plate);
    border-bottom: 2px solid var(--ink);
    visibility: hidden;
    clip-path: inset(0 0 100% 0);
    transition: clip-path 0.4s var(--ease-out), visibility 0s linear 0.4s;
  }
  .js .site-header[data-menu-open] .site-menu {
    visibility: visible;
    clip-path: inset(0 0 0 0);
    transition: clip-path 0.4s var(--ease-out), visibility 0s;
  }
  .js .site-nav ul { flex-direction: column; align-items: stretch; gap: 0; }
  .js .site-nav li + li { border-top: 1px solid var(--hair-strong); }
  .js .site-nav a {
    display: flex; padding: 0.85rem 0;
    font-size: 1.25rem; font-weight: 700;
    background: none;
  }
  .js .site-nav a:hover { color: var(--ukb); }
  .js .site-nav a[aria-current="page"] {
    text-decoration: underline 3px var(--dunedin);
    text-underline-offset: 0.35em;
  }
  .js .site-tools { padding-top: 1rem; border-top: 2px solid var(--ink); }
  /* in the menu the theme switch says what it does; its aria-label already names it */
  .js .theme-toggle {
    width: auto; grid-auto-flow: column; gap: 0.6rem; padding: 0 0.9rem;
    font: inherit; font-weight: 700; font-size: 1rem;
  }
  .js .theme-toggle::after { content: "Dark mode"; }
  .js[data-theme-active="dark"] .theme-toggle::after { content: "Light mode"; }

  /* without JS the links wrap under the name instead */
  html:not(.js) .site-header { height: auto; flex-wrap: wrap; padding-block: 0.75rem; row-gap: 0.25rem; }
  html:not(.js) .site-menu { flex-wrap: wrap; gap: 0.5rem 0.9rem; }
  html:not(.js) .site-nav ul { flex-wrap: wrap; gap: 0.25rem 0.9rem; }

  .title-block { margin-top: 1rem; }
  .title-block h1 { font-size: clamp(1.9rem, 8.6vw, 2.4rem); }
  .title-block .mobile-cta { width: 100%; justify-content: space-between; }

  .step h2 { margin-bottom: 1rem; }
  .step .lead { font-size: 1.0625rem; margin-bottom: 1.4rem; }

  .section { padding: 3.5rem var(--gutter); }
  .paper { grid-template-columns: 1fr; gap: 0.25rem; }
  .paper__venue { grid-column: 1; }
  .paper__year { font-size: 0.875rem; }
  .paper__title { font-size: 1.0625rem; }

  .actions .button { width: 100%; justify-content: center; }
  .portrait { max-width: none; }

  .page-head .title-block { padding: 1.25rem; }
  .year-axis svg { overflow: visible; }
  .year-axis text { font-size: 30px; }
  .year-axis .yr-alt { display: none; }
  .year-group h2 { font-size: 1.125rem; }
}