/* ============================================================
   Design tokens
   ============================================================ */
:root {
  --paper: #faf8f3;
  --card: #fffefb;
  --ink: #1c2333;
  --ink-soft: #4a5266;
  --ink-faint: #7c8296;
  --pine: #2f6f5e;
  --pine-dark: #234f43;
  --gold: #a6802d;
  --slate: #5b6a8f;
  --rule: #ded7c7;
  --rule-soft: #ece7da;

  --serif: "Source Serif 4", Georgia, serif;
  --sans: "IBM Plex Sans", -apple-system, Segoe UI, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, monospace;

  --max: 880px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a { color: var(--pine-dark); text-decoration-color: var(--rule); text-underline-offset: 3px; }
a:hover { color: var(--pine); }
a:focus-visible, button:focus-visible, .nav-toggle:focus-visible {
  outline: 2px solid var(--pine);
  outline-offset: 3px;
}

h1, h2, h3 {
  font-family: var(--serif);
  color: var(--ink);
  line-height: 1.2;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

/* ============================================================
   Header / nav
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(250, 248, 243, 0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--rule);
}

.nav-wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
}
.brand-mark {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--pine);
  border: 1px solid var(--pine);
  border-radius: 3px;
  padding: 2px 6px;
  letter-spacing: 0.04em;
}
.brand-name {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 18px;
}

nav.primary-nav {
  display: flex;
  gap: 28px;
}
nav.primary-nav a {
  font-size: 14.5px;
  color: var(--ink-soft);
  text-decoration: none;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
}
nav.primary-nav a:hover,
nav.primary-nav a[aria-current="page"] {
  color: var(--ink);
  border-bottom-color: var(--gold);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 6px 10px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink);
  cursor: pointer;
}

@media (max-width: 720px) {
  nav.primary-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--rule);
    flex-direction: column;
    gap: 0;
    padding: 4px 24px 14px;
    display: none;
  }
  nav.primary-nav.open { display: flex; }
  nav.primary-nav a { padding: 10px 0; border-bottom: 1px solid var(--rule-soft); }
  .nav-toggle { display: inline-block; }
}

/* ============================================================
   Hero (home page)
   ============================================================ */
.hero {
  padding: 76px 0 56px;
  border-bottom: 1px solid var(--rule);
}
.hero-eyebrow {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--pine);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 14px;
}
.hero h1 {
  font-size: 42px;
  margin: 0 0 6px;
}
.hero .role {
  font-size: 18px;
  color: var(--ink-soft);
  margin: 0 0 22px;
}
.hero p.lede {
  max-width: 62ch;
  font-size: 17.5px;
  color: var(--ink-soft);
}
.hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}
.hero-links a {
  font-family: var(--mono);
  font-size: 13px;
  text-decoration: none;
  color: var(--ink);
  border: 1px solid var(--rule);
  background: var(--card);
  padding: 7px 12px;
  border-radius: 4px;
}
.hero-links a:hover { border-color: var(--pine); color: var(--pine-dark); }

/* Hero layout with profile photo */
.hero-flex {
  display: flex;
  gap: 40px;
  align-items: center;
  flex-wrap: wrap-reverse;
}
.hero-text { flex: 1 1 380px; min-width: 280px; }
.hero-photo {
  width: 148px;
  height: 148px;
  border-radius: 10px;
  object-fit: cover;
  border: 1px solid var(--rule);
  background: var(--rule-soft);
  flex: 0 0 auto;
}
@media (max-width: 560px) {
  .hero-photo { width: 110px; height: 110px; }
}

/* ============================================================
   Sections
   ============================================================ */
section.block {
  padding: 52px 0;
  border-bottom: 1px solid var(--rule);
}
section.block:last-of-type { border-bottom: none; }

.block-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 28px;
}
.block-head h2 {
  font-size: 26px;
  margin: 0;
}
.block-count {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink-faint);
}
.block-intro {
  color: var(--ink-soft);
  max-width: 68ch;
  margin: -14px 0 28px;
}

/* ============================================================
   Index cards (the ledger / catalog motif)
   ============================================================ */
.catalog {
  display: grid;
  gap: 14px;
}
.entry {
  display: grid;
  grid-template-columns: 84px 1fr;
  gap: 18px;
  padding: 18px 20px;
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 6px;
}
.entry-id {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--pine);
  letter-spacing: 0.03em;
  padding-top: 2px;
}
.entry-title {
  font-family: var(--serif);
  font-size: 17.5px;
  font-weight: 600;
  margin: 0 0 3px;
  color: var(--ink);
}
.entry-meta {
  font-size: 14px;
  color: var(--ink-soft);
  margin: 0 0 8px;
}
.entry-desc {
  font-size: 15px;
  color: var(--ink-soft);
  margin: 0;
}
.entry-links { margin-top: 8px; display: flex; gap: 14px; flex-wrap: wrap; }
.entry-links a { font-size: 13.5px; font-family: var(--mono); }

.tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.03em;
  padding: 2px 8px;
  border-radius: 3px;
  text-transform: uppercase;
}
.tag-published { background: #e7f0ec; color: var(--pine-dark); }
.tag-submitted { background: #f4ecd9; color: var(--gold); }
.tag-progress  { background: #e9ecf5; color: var(--slate); }

@media (max-width: 560px) {
  .entry { grid-template-columns: 1fr; }
  .entry-id { padding-top: 0; }
}

/* Entry cards with a person photo (used on Research page) */
.entry-with-photo {
  grid-template-columns: 56px 84px 1fr;
}
.entry-photo {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--rule);
  background: var(--rule-soft);
}
@media (max-width: 560px) {
  .entry-with-photo { grid-template-columns: 56px 1fr; }
  .entry-with-photo .entry-id { grid-column: 2; padding-top: 0; }
  .entry-with-photo .entry-photo { grid-row: 1 / 3; }
}

/* Entry cards with a landscape thumbnail (used on Teaching page) */
.entry-with-thumb {
  grid-template-columns: 96px 84px 1fr;
}
.entry-thumb {
  width: 96px;
  height: 64px;
  object-fit: cover;
  border-radius: 4px;
  border: 1px solid var(--rule);
  background: var(--rule-soft);
}
@media (max-width: 560px) {
  .entry-with-thumb { grid-template-columns: 1fr; }
  .entry-with-thumb .entry-thumb { width: 100%; height: 120px; }
}

/* Photo gallery (used on Conferences & Workshops page) */
.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 14px;
  margin-top: 18px;
}
.gallery figure { margin: 0; }
.gallery img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 6px;
  border: 1px solid var(--rule);
  background: var(--rule-soft);
}
.gallery figcaption {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-faint);
  margin-top: 6px;
}

/* Standalone photo block — drop this ANYWHERE on any page for a single photo */
.photo-frame {
  margin: 28px 0;
}
.photo-frame img {
  width: 100%;
  border-radius: 6px;
  border: 1px solid var(--rule);
  background: var(--rule-soft);
  display: block;
}
.photo-frame figcaption {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-faint);
  margin-top: 8px;
}
.photo-frame.small { max-width: 340px; }

/* Small circular avatar — used next to names in plain lists (e.g. Alumni) */
.avatar-sm {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--rule);
  background: var(--rule-soft);
  margin-right: 10px;
  vertical-align: middle;
}

/* ============================================================
   Alumni / timeline list
   ============================================================ */
.simple-list { list-style: none; margin: 0; padding: 0; }
.simple-list li {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--rule-soft);
  font-size: 15.5px;
}
.simple-list li:last-child { border-bottom: none; }
.simple-list .who { color: var(--ink); display: flex; align-items: center; }
.simple-list .where { color: var(--ink-faint); font-family: var(--mono); font-size: 13.5px; text-align: right; }

/* ============================================================
   Footer
   ============================================================ */
footer.site-footer {
  padding: 40px 0 64px;
  color: var(--ink-faint);
  font-size: 13.5px;
  font-family: var(--mono);
}
footer.site-footer a { color: var(--ink-faint); }

.edit-note {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--gold);
  background: #f8f2e2;
  border: 1px dashed #d8c185;
  border-radius: 4px;
  padding: 10px 14px;
  margin-bottom: 24px;
}

/* ============================================================
   Student grid — 2-column layout with larger photos (Research page)
   ============================================================ */
.student-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
.student-card {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  padding: 20px;
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 6px;
}
.student-photo {
  width: 108px;
  height: 108px;
  border-radius: 8px;
  object-fit: cover;
  border: 1px solid var(--rule);
  background: var(--rule-soft);
  flex: 0 0 auto;
}
.student-info { min-width: 0; }
.student-info .entry-id { margin-bottom: 4px; }
.student-info .entry-title { margin-top: 0; }
@media (max-width: 720px) {
  .student-grid { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .student-card { flex-direction: column; align-items: flex-start; }
  .student-photo { width: 100%; height: 200px; }
}