/* Kosaraju BioAI Lab — brand v1.0 (2026-09-15) */
:root {
  --brand-ink: #001777;
  --brand-sage: #9FA372;
  --brand-olive: #8C9173;
  --brand-slate: #505977;
  --brand-ivory: #FFFFF5;
  --brand-white: #FFFFFF;

  --bg: var(--brand-ivory);
  --surface: var(--brand-white);
  --text: var(--brand-ink);
  --text-muted: var(--brand-slate);
  --accent: var(--brand-sage);
  --accent-deep: var(--brand-olive);
  --rule: rgba(0, 23, 119, .18);
  --rule-strong: rgba(0, 23, 119, .45);

  --font-extended: "new-science-extended", "Archivo", "Helvetica Neue", sans-serif;
  --font-sans: "new-science", "Archivo", "Helvetica Neue", sans-serif;
  --font-serif: "new-science-serif", "Zilla Slab", Georgia, serif;
  --tracking-display: .02em;
  --tracking-label: .11em;

  --wrap: 1140px;
  --gutter: clamp(20px, 5vw, 56px);
  --radius: 0;
  --rule-width: 1px;
}

html { color-scheme: light; -webkit-text-size-adjust: 100%; }
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-serif);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; }
h1, h2, h3, p, ul, ol { margin: 0; }
ul { padding: 0; list-style: none; }
a { color: var(--brand-ink); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; text-decoration-color: var(--rule-strong); }
a:hover { text-decoration-color: var(--brand-ink); }
a:focus-visible, button:focus-visible { outline: 2px solid var(--brand-ink); outline-offset: 2px; }

.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: var(--gutter); }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: var(--gutter); top: 10px; background: var(--surface); padding: 8px 12px; z-index: 5; }

.ext { font-family: var(--font-extended); font-weight: 700; text-transform: uppercase; letter-spacing: var(--tracking-display); }
.sans { font-family: var(--font-sans); font-weight: 400; }
.label {
  font-family: var(--font-extended); font-weight: 700; text-transform: uppercase;
  letter-spacing: var(--tracking-label); font-size: 11px; line-height: 1.3;
}
.muted { color: var(--text-muted); }
.cap { color: var(--text-muted); font-size: 14px; line-height: 1.5; }
.body-text { color: var(--text-muted); }
h1.page-title { font-family: var(--font-extended); font-weight: 700; text-transform: uppercase; letter-spacing: var(--tracking-display); font-size: clamp(32px, 5vw, 52px); line-height: 1.05; }
h2.section { font-family: var(--font-extended); font-weight: 700; text-transform: uppercase; letter-spacing: var(--tracking-display); font-size: clamp(22px, 3vw, 30px); line-height: 1.1; }
h3.subline { font-family: var(--font-serif); font-weight: 700; font-size: 19px; line-height: 1.3; }

/* header */
.site-header { border-bottom: var(--rule-width) solid var(--rule); }
.site-header .wrap { display: flex; align-items: center; gap: 24px; padding-block: 22px; flex-wrap: wrap; }
.site-header .logo { display: flex; flex: none; text-decoration: none; }
.site-header .logo img { height: 52px; width: auto; display: block; }
.site-nav { display: flex; gap: 22px; align-items: baseline; flex-wrap: wrap; margin-left: auto; }
.site-nav a { font-size: 12px; text-decoration: none; }
.site-nav a[aria-current="page"] { text-decoration: underline; text-decoration-thickness: 2px; text-decoration-color: var(--brand-ink); }

/* generic layout helpers */
.section { padding-block: clamp(28px, 4vw, 48px); }
.section-head { display: flex; align-items: baseline; gap: 20px; border-top: var(--rule-width) solid var(--rule-strong); padding-top: 14px; margin-bottom: 22px; }
.section-head .more { margin-left: auto; white-space: nowrap; }
.split { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: clamp(28px, 4vw, 56px); align-items: start; }
.rule-top { border-top: var(--rule-width) solid var(--rule); }

/* home hero */
.statement { font-family: var(--font-sans); font-weight: 400; font-size: clamp(30px, 4.2vw, 54px); line-height: 1.04; letter-spacing: -.01em; }

/* slides */
.slide-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 26px; }
.slide { display: flex; background: var(--surface); border: var(--rule-width) solid var(--rule); aspect-ratio: 3 / 1; }
.slide .label-end {
  width: 26%; flex: none; background: var(--accent); border-right: var(--rule-width) solid var(--rule);
  padding: 9px 8px; display: flex; flex-direction: column; justify-content: space-between; gap: 3px; color: var(--brand-ink);
}
.slide .label-end .name { font-family: var(--font-extended); font-weight: 700; text-transform: uppercase; letter-spacing: var(--tracking-label); font-size: 9px; line-height: 1.3; }
.slide .label-end .sub { font-size: 9px; line-height: 1.25; opacity: .8; }
.slide .glass { flex-grow: 1; padding: 9px 12px; display: flex; }
.slide .glass img { width: 100%; height: 100%; object-fit: contain; display: block; mix-blend-mode: multiply; }

/* research rows */
.research-row { display: grid; grid-template-columns: 300px minmax(0, 1fr) 210px; gap: 34px; padding-block: 26px; border-top: var(--rule-width) solid var(--rule); align-items: start; }
.research-row img { width: 210px; height: 124px; object-fit: contain; object-position: right top; display: block; mix-blend-mode: multiply; }

/* publications */
.filters { display: flex; flex-wrap: wrap; gap: 10px 18px; align-items: center; padding-block: 16px; border-top: var(--rule-width) solid var(--rule); border-bottom: var(--rule-width) solid var(--rule); }
.filters button {
  font-family: var(--font-extended); font-weight: 700; text-transform: uppercase; letter-spacing: var(--tracking-label);
  font-size: 11px; color: var(--brand-ink); background: none; border: 0; border-bottom: 2px solid transparent;
  padding: 4px 0; cursor: pointer;
}
.filters button[aria-pressed="true"] { border-bottom-color: var(--brand-ink); }
.filters .group { display: flex; gap: 16px; flex-wrap: wrap; align-items: center; }
.filters .count { margin-left: auto; }

.year-block { display: grid; grid-template-columns: 110px minmax(0, 1fr); gap: 28px; }
.year-block > h2 { font-family: var(--font-extended); font-weight: 700; font-size: 26px; line-height: 1.1; color: var(--accent); padding-top: 24px; }
.pub { display: grid; grid-template-columns: minmax(0, 1fr) 250px; gap: 36px; padding-block: 22px 24px; border-top: var(--rule-width) solid var(--rule); }
.pub .meta { display: flex; flex-direction: column; gap: 7px; }
.pub h3 { font-family: var(--font-serif); font-weight: 700; font-size: 20px; line-height: 1.3; }
.pub .authors b { color: var(--brand-ink); }
.pub .links { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 6px; }
.pub .links a { font-family: var(--font-extended); font-weight: 700; text-transform: uppercase; letter-spacing: var(--tracking-label); font-size: 11px; text-decoration: none; border-bottom: 1px solid var(--rule-strong); }
.pub .summary { max-width: 70ch; }

/* people */
.people-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 40px 36px; }
.person .photo, .pi-photo { background: var(--surface); border: var(--rule-width) solid var(--rule); display: flex; align-items: center; justify-content: center; aspect-ratio: 4 / 5; }
.person .photo img, .pi-photo img { width: 100%; height: 100%; object-fit: cover; display: block; }
.person h3 { font-family: var(--font-serif); font-weight: 700; font-size: 18px; line-height: 1.3; margin-top: 12px; }
.pi-row { display: grid; grid-template-columns: 280px minmax(0, 1fr) 300px; gap: 44px; align-items: start; }
.collab-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px 44px; }
.collab { display: flex; flex-direction: column; gap: 8px; padding-top: 18px; border-top: var(--rule-width) solid var(--rule); }

/* teaching */
.course { display: grid; grid-template-columns: 200px minmax(0, 1fr) 180px; gap: 34px; padding-block: 26px; border-top: var(--rule-width) solid var(--rule); align-items: start; }
.course .code { font-family: var(--font-extended); font-weight: 700; text-transform: uppercase; letter-spacing: var(--tracking-display); font-size: 24px; line-height: 1.1; }
.led { display: grid; grid-template-columns: minmax(0, 1fr) 260px; gap: 28px; padding-block: 16px; border-top: var(--rule-width) solid var(--rule); }

/* contact */
.kv { display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: 24px; padding-block: 16px; border-top: var(--rule-width) solid var(--rule); }
.mailto-big { font-family: var(--font-sans); font-size: clamp(24px, 3.4vw, 40px); line-height: 1.1; text-decoration: none; border-bottom: 2px solid var(--rule-strong); }

/* footer */
.site-footer { border-top: var(--rule-width) solid var(--rule); margin-top: 20px; }
.site-footer .cols { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 40px; padding-block: 30px 36px; align-items: start; }
.site-footer .colophon { border-top: var(--rule-width) solid var(--rule); padding-block: 14px 34px; display: flex; gap: 20px; align-items: center; flex-wrap: wrap; }
.site-footer .colophon img { height: 26px; width: auto; display: block; }
.site-footer .colophon .fill { flex-grow: 1; }

.loading { padding-block: 24px; }

@media (max-width: 1000px) {
  .research-row { grid-template-columns: minmax(0, 1fr); gap: 16px; }
  .research-row img { width: 100%; max-width: 320px; height: auto; object-position: left top; }
  .pi-row { grid-template-columns: minmax(0, 1fr); gap: 28px; }
  .pi-photo { max-width: 280px; }
  .course, .led, .kv { grid-template-columns: minmax(0, 1fr); gap: 12px; }
  .pub { grid-template-columns: minmax(0, 1fr); gap: 18px; }
  .pub .slide { max-width: 320px; }
  .split { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 720px) {
  .site-header .wrap { padding-block: 16px; gap: 14px; }
  .site-header .logo img { height: 40px; width: auto; }
  .site-nav { gap: 14px 16px; width: 100%; margin-left: 0; }
  .year-block { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .year-block > h2 { padding-top: 26px; }
  .site-footer .cols { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .filters .count { margin-left: 0; width: 100%; }
}

@media print {
  .site-nav, .filters { display: none; }
  body { background: #fff; }
}

/* home: recent work list */
.recent-item { display: grid; grid-template-columns: 54px minmax(0, 1fr); gap: 16px; padding-block: 14px; }
.recent-item > span:first-child { padding-top: 4px; }
.recent-item a { text-decoration: none; font-weight: 700; font-size: 17px; line-height: 1.35; }
.recent-item a:hover { text-decoration: underline; }

/* a plain figure on publications that are not tissue images */
.pub-figure { width: 100%; max-width: 250px; height: auto; display: block; mix-blend-mode: multiply; }

/* sponsors */
.support-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 26px 40px; }
.support { display: flex; flex-direction: column; gap: 8px; padding-top: 16px; border-top: var(--rule-width) solid var(--rule); }
.support .label { align-self: flex-start; }

/* recent: collaborator news */
.news-item { display: grid; grid-template-columns: 118px minmax(0, 1fr) 150px; gap: 28px; padding-block: 20px; border-top: var(--rule-width) solid var(--rule); align-items: start; }
.news-item > .label { white-space: nowrap; }
.news-item h3 { font-family: var(--font-serif); font-weight: 700; font-size: 19px; line-height: 1.3; }
.news-item h3 a { text-decoration: none; }
.news-item h3 a:hover { text-decoration: underline; }
.news-group { display: flex; flex-direction: column; gap: 4px; text-align: right; }
@media (max-width: 1000px) {
  .news-item { grid-template-columns: minmax(0, 1fr); gap: 8px; }
  .news-group { text-align: left; flex-direction: row; gap: 12px; flex-wrap: wrap; }
}

/* ---- phones ---- */
@media (max-width: 720px) {
  /* the lockup fills the width instead of sitting small in a corner */
  .site-header .wrap { flex-direction: column; align-items: stretch; gap: 0; padding-block: 18px 0; }
  .site-header .logo img { width: 100%; max-width: 430px; height: auto; }
  .site-nav {
    margin: 14px 0 0; gap: 0; display: grid; grid-template-columns: repeat(3, 1fr);
    border-top: var(--rule-width) solid var(--rule);
  }
  .site-nav a {
    font-size: 13px; padding: 14px 0; min-height: 44px; display: flex; align-items: center;
    border-bottom: var(--rule-width) solid var(--rule);
  }

  /* slides read better a bit taller, with a wider label */
  .slide { aspect-ratio: 2 / 1; }
  .slide .label-end { width: 33%; padding: 10px; }
  .slide .label-end .name { font-size: 11px; }
  .slide .label-end .sub { font-size: 10.5px; }
  .slide-grid { gap: 18px; }

  /* figures given a fixed height on desktop should breathe here */
  .chol-figures img { height: auto !important; }

  /* photos should not swallow the screen */
  .pi-photo { max-width: 260px; }
  .person .photo { max-width: 300px; }

  /* filters as real buttons rather than tiny text */
  .filters { gap: 6px 14px; }
  .filters button { font-size: 12px; padding: 10px 0; min-height: 40px; }
  .filters .group { gap: 14px; }

  /* links in running text get a comfortable tap area */
  .news-item h3, .pub h3 { font-size: 18px; }
  .site-footer .colophon { gap: 12px; }
}

@media (max-width: 420px) {
  .site-nav { grid-template-columns: repeat(2, 1fr); }
}