/* Self-hosted fonts (SIL Open Font License; see fonts/LICENSE-*.txt). */
@font-face { font-family: "Newsreader"; font-style: normal; font-weight: 200 800; font-display: swap; src: url("fonts/newsreader-normal.woff2") format("woff2-variations"); }
@font-face { font-family: "Newsreader"; font-style: italic; font-weight: 200 800; font-display: swap; src: url("fonts/newsreader-italic.woff2") format("woff2-variations"); }
@font-face { font-family: "IBM Plex Sans"; font-style: normal; font-weight: 400; font-display: swap; src: url("fonts/ibm-plex-sans-400-normal.woff2") format("woff2"); }
@font-face { font-family: "IBM Plex Sans"; font-style: italic; font-weight: 400; font-display: swap; src: url("fonts/ibm-plex-sans-400-italic.woff2") format("woff2"); }
@font-face { font-family: "IBM Plex Sans"; font-style: normal; font-weight: 500; font-display: swap; src: url("fonts/ibm-plex-sans-500-normal.woff2") format("woff2"); }
@font-face { font-family: "IBM Plex Sans"; font-style: normal; font-weight: 600; font-display: swap; src: url("fonts/ibm-plex-sans-600-normal.woff2") format("woff2"); }

/* Chivukula Lab site stylesheet.
   Layout: one scrolling column. Full-width bands alternate white and a cool
   light grey; every band's content sits in a centered wrapper. Running text
   is held to a comfortable measure; grids of people and research areas may
   use the full wrapper width. */

:root {
  --bg: #ffffff;
  --surface: #f3f5f7;
  --fg: #1b2229;
  --muted: #5d6771;
  --accent: #1f5a6a;
  --rule: #dfe4e8;
  --placeholder: #d9dde1;
  --plate: transparent;        /* behind affiliation logos; white in dark mode */
  --plate-border: transparent;

  --display: "Newsreader", "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --body: "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;

  --wrap: 72rem;
  --measure: 42rem;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #121619;
    --surface: #191f24;
    --fg: #e6e9ec;
    --muted: #9ba5ae;
    --accent: #7fc4d3;
    --rule: #2a3238;
    --placeholder: #2c343a;
    --plate: #ffffff;
    --plate-border: #ffffff;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #121619;
  --surface: #191f24;
  --fg: #e6e9ec;
  --muted: #9ba5ae;
  --accent: #7fc4d3;
  --rule: #2a3238;
  --placeholder: #2c343a;
  --plate: #ffffff;
  --plate-border: #ffffff;
  color-scheme: dark;
}

/* Base ------------------------------------------------------------------ */

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

html { scroll-behavior: smooth; scroll-padding-top: 4rem; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--body);
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
figure { margin: 0; }
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 0.15em; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

h1, h2, h3, h4 {
  font-family: var(--display);
  font-weight: 500;
  line-height: 1.15;
  margin: 0;
  text-wrap: balance;
}
h1 { font-size: clamp(2rem, 1.2rem + 2.6vw, 3.25rem); }
h2 { font-size: clamp(1.75rem, 1.3rem + 1.4vw, 2.375rem); margin-bottom: 1.5rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.125rem; }

p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }
ul { margin: 0; padding: 0; list-style: none; }

.wrap {
  max-width: var(--wrap);
  margin-inline: auto;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
}
@media (min-width: 40em) {
  .wrap {
    padding-left: max(2rem, env(safe-area-inset-left, 0px));
    padding-right: max(2rem, env(safe-area-inset-right, 0px));
  }
}

.measure { max-width: var(--measure); }
.measure p + p { margin-top: 1em; }

main > section { padding-block: 4.5rem; }
@media (min-width: 60em) { main > section { padding-block: 6rem; } }
.band { background: var(--surface); }

/* Top bar --------------------------------------------------------------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--bg);
  border-bottom: 1px solid var(--rule);
}
.topbar .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  padding-block: 0.9rem;
}
.brand {
  font-family: var(--display);
  font-size: 1.375rem;
  font-weight: 500;
  color: var(--fg);
  text-decoration: none;
  letter-spacing: 0.01em;
}
.topbar nav { display: flex; flex-wrap: wrap; gap: 0.25rem 1.25rem; }
.topbar nav a {
  color: var(--fg);
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 500;
}
.topbar nav a:hover { color: var(--accent); }

/* Hero ------------------------------------------------------------------ */

main > section.hero { padding-top: 0; }
.hero-figure img {
  width: 100%;
  height: clamp(14rem, 32vw, 26rem);
  object-fit: cover;
  background: var(--placeholder);
}
.hero-text { padding-top: 3.5rem; max-width: var(--wrap); }
@media (min-width: 60em) { .hero-text { padding-top: 4.5rem; } }
.hero-text h1 { max-width: 22ch; }
.eyebrow {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 1.25rem;
  line-height: 1.5;
}
.hero-text h1 { margin-bottom: 1.25rem; }
.lede {
  font-size: 1.125rem;
  max-width: 36rem;
  color: var(--fg);
}

/* News ------------------------------------------------------------------ */

#news { padding-block: 3rem; }
@media (min-width: 60em) { #news { padding-block: 3.5rem; } }
.news-grid { display: grid; gap: 1rem 3rem; }
@media (min-width: 50em) { .news-grid { grid-template-columns: 12rem 1fr; } }
.news-grid h2 { margin-bottom: 0; }
.news-grid > div { max-width: 44rem; min-width: 0; }
.news-item {
  display: grid;
  gap: 0.15rem 1.5rem;
  padding: 0.7rem 0;
  border-top: 1px solid var(--rule);
  font-size: 0.9375rem;
}
@media (min-width: 36em) { .news-item { grid-template-columns: 8.5rem 1fr; } }
.news:last-child .news-item:last-child { border-bottom: 1px solid var(--rule); }
.news-date { color: var(--muted); font-variant-numeric: tabular-nums; white-space: nowrap; }
.news-text .more { white-space: nowrap; }
.news-older { margin-top: 0.5rem; }
.news-older summary {
  cursor: pointer;
  color: var(--accent);
  font-size: 0.9375rem;
  padding: 0.4rem 0;
  list-style: none;
}
.news-older summary::-webkit-details-marker { display: none; }
.news-older summary::after { content: " \2193"; }
.news-older[open] summary::after { content: " \2191"; }
.news-older summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

/* Research -------------------------------------------------------------- */

/* Each research area is a full-width figure strip (three panels wide, as
   exported from the figure file) followed by its title and text. */
.areas {
  display: grid;
  gap: 3.5rem;
  margin-top: 3rem;
}
.area figure {
  margin-bottom: 1.25rem;
  border-top: 2px solid var(--accent);
  padding-top: 1.25rem;
}
.panels { display: grid; gap: 0.75rem; grid-template-columns: repeat(3, 1fr); }
.panels-1 { grid-template-columns: 1fr; }
.panels-2 { grid-template-columns: repeat(2, 1fr); }
.area img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  background: var(--placeholder);
}
.panels-1 img { aspect-ratio: 3 / 1; }
@media (max-width: 36em) { .panels img { aspect-ratio: 1 / 1; } }
.area h3 { margin-bottom: 0.6rem; }
.area p { max-width: var(--measure); }
@media (min-width: 60em) {
  .area { display: grid; grid-template-columns: 1fr; }
  .area-text { display: grid; grid-template-columns: 20rem 1fr; gap: 2.5rem; align-items: start; }
  .area-text h3 { margin-bottom: 0; }
}

/* Team ------------------------------------------------------------------ */

.pi {
  display: grid;
  gap: 1.25rem 2.5rem;
  align-items: start;
  margin-bottom: 3.5rem;
}
@media (min-width: 50em) {
  .pi { grid-template-columns: 16rem 1fr; }
  .pi-head { grid-column: 1 / -1; }
}
.pi-head h3 { margin-bottom: 0.2rem; }
.pi-text { max-width: var(--measure); min-width: 0; }
.pi-text p + p { margin-top: 1em; }
.cv { margin-top: 1em; }

.portrait img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  background: var(--placeholder);
  /* Headshots come from many sources; black and white evens them out.
     Delete the next line to show them in color. */
  filter: grayscale(1) contrast(1.05);
}

.role { color: var(--muted); font-size: 0.9375rem; }

.members {
  display: grid;
  gap: 2.5rem 2rem;
}
@media (min-width: 36em) { .members { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 52em) { .members { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 72em) { .members { grid-template-columns: repeat(4, 1fr); } }
.member { min-width: 0; }
.member figure { margin-bottom: 0.9rem; }
.member h4 { margin-bottom: 0.1rem; font-size: 1.25rem; }
.member .role { margin-bottom: 0.6rem; }
.member p { font-size: 0.9375rem; }

.alumni { margin-top: 1rem; max-width: var(--measure); }
#team .wrap > h3 { margin-top: 3.5rem; }   /* the "Alumni" heading only */
.alumni li {
  padding: 0.6rem 0;
  border-top: 1px solid var(--rule);
  font-size: 0.9375rem;
}
.alumni li:last-child { border-bottom: 1px solid var(--rule); }
.alumni .name { font-weight: 500; }
.alumni .detail { color: var(--muted); }
.alumni .detail::before { content: "\00b7"; margin-inline: 0.4em; }
.alumni .now { display: block; color: var(--muted); }
@media (min-width: 40em) { .alumni .now { display: inline; } .alumni .now::before { content: "\00b7"; margin-inline: 0.4em; } }

/* Publications ---------------------------------------------------------- */

#publications h3 { margin-bottom: 1rem; }
#publications h3 + .pubs { margin-bottom: 2rem; }
.pubs-all summary {
  cursor: pointer;
  list-style: none;
  font-family: var(--display);
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--fg);
  padding: 0.25rem 0;
}
.pubs-all summary::-webkit-details-marker { display: none; }
.pubs-all summary::after { content: " \2193"; color: var(--accent); }
.pubs-all[open] summary::after { content: " \2191"; }
.pubs-all summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }
.pubs-all summary:hover { color: var(--accent); }
.year {
  font-family: var(--body);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 1.5rem 0 0.5rem;
  font-variant-numeric: tabular-nums;
}
.pubs { max-width: 52rem; }
.pub {
  display: grid;
  gap: 0.15rem;
  padding: 1rem 0;
  border-top: 1px solid var(--rule);
  font-size: 0.9375rem;
}
.pubs .pub:last-child { border-bottom: 1px solid var(--rule); }
.pub-title { font-size: 1.0625rem; line-height: 1.4; }
.pub-title a { color: var(--fg); text-decoration: none; }
.pub-title a:hover { color: var(--accent); text-decoration: underline; }
.pub-authors { color: var(--muted); }
.pub-authors b { font-weight: 600; color: var(--fg); }
.pub-where { font-variant-numeric: tabular-nums; }
.pub-links { display: flex; flex-wrap: wrap; gap: 1rem; font-size: 0.875rem; margin-top: 0.2rem; }

/* Join, contact, footer ------------------------------------------------- */

.two-col {
  display: grid;
  gap: 3rem;
}
@media (min-width: 50em) { .two-col { grid-template-columns: 1fr 1fr; gap: 4rem; } }
.two-col > div { max-width: 34rem; min-width: 0; }
.action { margin-top: 1.25rem; }
.action a {
  display: inline-block;
  padding: 0.6rem 1.1rem;
  border: 1.5px solid var(--accent);
  border-radius: 3px;
  text-decoration: none;
  font-weight: 500;
}
.action a:hover { background: var(--accent); color: var(--bg); }
.funding { margin-top: 1.5rem; font-size: 0.9375rem; color: var(--muted); }

.linklist li { padding: 0.35rem 0; }

/* Affiliation logos. Each sits on a white plate so the marks keep their
   own colors in dark mode too. */
.logos { display: flex; flex-direction: column; gap: 0.75rem; margin-bottom: 1.5rem; max-width: 22rem; }
.logo {
  display: block;
  background: var(--plate);
  border: 1px solid var(--plate-border);
  border-radius: 4px;
  padding: 0.6rem 0.8rem;
}
.logo img { width: 100%; height: 3rem; object-fit: contain; object-position: left center; }

footer {
  border-top: 1px solid var(--rule);
  padding-block: 1.5rem;
  font-size: 0.875rem;
  color: var(--muted);
}