/* MedStar Symposium Catalog — scholarly research theme
   Fraunces for display, IBM Plex Sans for body, Plex Mono for labels.
   Warm ivory ground, deep navy rule, burnt-sienna accents. */

:root {
  --paper: #f6f1e7;
  --paper-2: #fbf7ef;
  --ink: #1a1a1a;
  --ink-soft: #4a4842;
  --muted: #7a7870;
  --line: #d9d0bd;
  --rule: #1b4965;
  --accent: #b5651d;
  --accent-soft: #e6d3b8;
  --sel: #f2c94c;
  --tag: #efe6d2;

  /* MedStar-inspired deep navy for the masthead. Tune to taste. */
  --brand-dark: #0a2e4e;
  --brand-dark-2: #143a5c;
  --brand-gold: #f5c518;

  /* Background photo controls.
     --paper-overlay: opacity of the overlay (higher = less photo visible).
     --paper-overlay-rgb: overlay color as R, G, B. A more neutral value
     like "252, 250, 245" stops the photo from being tinted tan. Use
     "246, 241, 231" to match the tan --paper variable exactly. */
  --paper-overlay: 0.78;
  --paper-overlay-rgb: 252, 250, 245;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--paper); color: var(--ink); }
body {
  font-family: "IBM Plex Sans", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  background-color: var(--paper);
  background-image:
    radial-gradient(1200px 600px at 90% -10%, rgba(181,101,29,0.035), transparent 60%),
    radial-gradient(900px 500px at -10% 20%, rgba(27,73,101,0.035), transparent 60%),
    linear-gradient(
      rgba(var(--paper-overlay-rgb), var(--paper-overlay)),
      rgba(var(--paper-overlay-rgb), var(--paper-overlay))
    ),
    url('background.jpg');
  background-size: auto, auto, auto, cover;
  background-position: center;
  background-repeat: no-repeat;
  background-attachment: fixed;
}

a { color: var(--rule); text-decoration: none; border-bottom: 1px solid transparent; transition: border-color .15s; }
a:hover { border-bottom-color: var(--rule); }

/* Masthead ---------------------------------------------------------------- */
/* Two bands: reconstructed brand banner up top (logos + stacked text),
   and a light utility subbar with the Poster Catalog label and nav below.
   The whole masthead sticks to the top of the viewport on scroll. */
.masthead {
  border-bottom: 3px solid var(--accent);
  position: sticky;
  top: 0;
  z-index: 100;
  /* A soft shadow that fades in only once the page has scrolled. */
  box-shadow: 0 4px 16px -8px rgba(10, 46, 78, 0);
  transition: box-shadow .2s ease;
}
.masthead.is-scrolled {
  box-shadow: 0 4px 16px -6px rgba(10, 46, 78, 0.35);
}

.banner {
  background: var(--brand-dark);
  background-image: linear-gradient(180deg, var(--brand-dark-2), var(--brand-dark));
}
.banner-inner {
  max-width: 1180px; margin: 0 auto;
  padding: 1.25rem 2rem;
  display: flex; align-items: center; gap: 2.75rem;
}
.banner-logos {
  display: flex; align-items: center;
  flex-shrink: 0;
  border: none;
}
.banner-logos:hover { opacity: .9; }
.banner-logo-combined {
  display: block;
  height: 62px;
  width: auto;
  max-width: 320px;
  object-fit: contain;
}
.banner-text {
  display: flex; flex-direction: column; gap: .1em;
  line-height: 1.1;
  min-width: 0;
}
.banner-title, .banner-subtitle {
  font-family: "IBM Plex Sans", system-ui, sans-serif;
  font-weight: 700;
  margin: 0;
  letter-spacing: -0.005em;
}
.banner-title {
  font-size: clamp(1.3rem, 2.6vw, 1.95rem);
  color: #fff;
}
.banner-subtitle {
  font-size: clamp(1.2rem, 2.4vw, 1.8rem);
  color: var(--brand-gold);
}

.subbar {
  background: #ffffff;
  border-bottom: 1px solid var(--line);
}
.subbar-inner {
  max-width: 1180px; margin: 0 auto;
  display: flex; justify-content: space-between; align-items: center;
  gap: 1.5rem; padding: .75rem 2rem;
}
.subbar-eyebrow {
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px; letter-spacing: .18em; text-transform: uppercase;
  color: var(--muted);
  border: none;
}
.subbar-eyebrow:hover { color: var(--rule); }

.primary-nav { display: flex; gap: 1.5rem; align-items: center; }
.primary-nav a {
  font-family: "IBM Plex Sans", sans-serif;
  font-size: 14px; font-weight: 500;
  color: var(--ink-soft); border: none;
  padding-bottom: 3px; border-bottom: 2px solid transparent;
}
.primary-nav a:hover { color: var(--ink); border-bottom-color: var(--accent); }
.primary-nav a.active { color: var(--ink); border-bottom-color: var(--rule); }

/* Short decorative rule used at the top of content-page section headers */
.brand-rule.short {
  width: 40px; height: 4px; border-radius: 2px;
  margin-bottom: .75rem; background: var(--rule);
}

/* Page layout ------------------------------------------------------------- */
.page {
  max-width: 1180px;
  margin: 2rem auto;
  padding: 2.5rem 2.75rem 3rem;
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: 6px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.03), 0 16px 40px -20px rgba(27,73,101,0.25);
}
/* The network page benefits from extra width so the graph can breathe */
.page.page-wide {
  max-width: 1720px;
}
.page-foot {
  max-width: 1180px; margin: 0 auto; padding: 1.5rem 2rem 2.5rem;
  color: var(--muted); font-size: 13px;
}
.eyebrow {
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px; letter-spacing: .18em; text-transform: uppercase;
  color: var(--muted); margin: 0;
}
.lede {
  font-family: "Fraunces", Georgia, serif;
  font-size: 1.15rem; font-weight: 400; line-height: 1.5;
  color: var(--ink-soft); max-width: 62ch;
}
.intro { margin-bottom: 1.75rem; }

/* Search card ------------------------------------------------------------- */
.search-card {
  position: relative;
  display: grid;
  grid-template-columns: 2fr 2fr 1.5fr auto;
  gap: 1rem 1.25rem;
  align-items: end;
  padding: 1.75rem 1.75rem 1.75rem 2.25rem;
  background: var(--paper);
  border: 1px solid var(--line);
  border-left: 4px solid var(--rule);
  border-radius: 4px;
  box-shadow: 0 1px 0 rgba(0,0,0,0.02), 0 12px 28px -20px rgba(27,73,101,.4);
  margin-bottom: 2rem;
}
.field { display: flex; flex-direction: column; gap: .35rem; }
.field label {
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--rule); font-weight: 500;
}
.field input, .field select {
  font-family: inherit;
  font-size: 15px;
  padding: .7rem .85rem;
  background: #fff;
  color: var(--ink);
  border: 1.5px solid #c5b9a3;
  border-radius: 3px;
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}
.field input:focus, .field select:focus {
  border-color: var(--rule);
  box-shadow: 0 0 0 3px rgba(27,73,101,.18);
}
.field.actions { flex-direction: row; align-items: center; gap: 1rem; }
.field.grow { min-width: 220px; }
button {
  font-family: "IBM Plex Sans", sans-serif;
  font-weight: 500; font-size: 14px;
  padding: .7rem 1.4rem;
  background: var(--rule); color: #fff;
  border: none; border-radius: 3px; cursor: pointer;
  letter-spacing: .02em;
  transition: background .15s, transform .05s;
}
button:hover { background: #143a53; }
button:active { transform: translateY(1px); }
.reset-link { font-size: 14px; color: var(--muted); border: none; }
.reset-link:hover { color: var(--accent); }

/* Ghost-style reset button paired with Apply */
.btn-reset {
  margin-top: .4rem;
  background: transparent;
  color: var(--ink-soft);
  border: 1px solid var(--line);
  padding: .55rem 1rem;
}
.btn-reset:hover {
  color: var(--rule);
  border-color: var(--rule);
  background: #fff;
}

/* Results bar ------------------------------------------------------------- */
.results-bar {
  display: flex; flex-wrap: wrap; gap: .5rem .75rem;
  align-items: center; margin-bottom: 1.25rem;
  padding-bottom: .9rem; border-bottom: 1px solid var(--line);
}
.count {
  font-family: "Fraunces", Georgia, serif;
  font-weight: 600; font-size: 1.25rem; color: var(--ink);
}
.chip {
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px; text-transform: uppercase; letter-spacing: .1em;
  background: var(--accent-soft); color: #5e3f17;
  padding: 3px 8px; border-radius: 2px;
}

/* Poster list ------------------------------------------------------------- */
.poster-list { list-style: none; padding: 0; margin: 0; }
.poster-item {
  display: grid; grid-template-columns: 90px 1fr;
  gap: 1.5rem; padding: 1.5rem 0;
  border-bottom: 1px solid var(--line);
}
.poster-item:first-child { padding-top: 0; }
.poster-index { display: flex; flex-direction: column; align-items: flex-start; gap: .5rem; }
.poster-num {
  font-family: "IBM Plex Mono", monospace;
  font-size: 13px; font-weight: 500;
  background: var(--ink); color: var(--paper);
  padding: 4px 9px; border-radius: 2px;
  letter-spacing: .05em;
}
.vote {
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px; color: var(--muted);
  letter-spacing: .08em;
}
.vote::before { content: "★ "; color: var(--accent); }
.poster-title {
  font-family: "Fraunces", Georgia, serif;
  font-weight: 600; font-size: 1.2rem; line-height: 1.3;
  color: var(--ink); margin: 0 0 .5rem;
  letter-spacing: -0.005em;
}
.poster-authors {
  font-size: 14.5px; color: var(--ink-soft); margin: 0 0 .75rem;
}
.poster-authors a { color: var(--ink-soft); border: none; }
.poster-authors a:hover { color: var(--rule); text-decoration: underline; }
.poster-meta { display: flex; flex-wrap: wrap; gap: .4rem; }
.tag {
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px; letter-spacing: .06em;
  background: var(--tag); color: var(--ink-soft);
  padding: 3px 8px; border-radius: 2px;
  border: 1px solid var(--line);
}
.tag-category { background: var(--rule); color: #fff; border-color: var(--rule); }
.tag-format { background: #fff; }
.tag-loc { background: transparent; }

.empty {
  padding: 2rem; text-align: center; color: var(--muted);
  background: var(--paper-2); border: 1px dashed var(--line); border-radius: 4px;
}

/* Keyword chips ----------------------------------------------------------- */
.keyword-row {
  display: flex; flex-wrap: wrap; gap: .35rem;
  margin: 0 0 .65rem;
}
.kw-chip {
  display: inline-flex; align-items: center; gap: .35em;
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px; letter-spacing: .02em;
  color: var(--accent); background: var(--paper);
  border: 1px solid var(--accent-soft);
  padding: 3px 9px; border-radius: 99px;
  transition: background .12s, color .12s, border-color .12s;
}
.kw-chip::before { content: "#"; color: var(--muted); font-weight: 500; }
.kw-chip:hover {
  background: var(--accent); color: #fff;
  border-color: var(--accent);
}
.kw-chip:hover::before { color: rgba(255,255,255,.55); }

/* Trending topics cloud on the home page */
.trending {
  padding: 2rem;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 4px;
  margin-bottom: 2.5rem;
}
.trending h2 {
  font-family: "Fraunces", Georgia, serif;
  font-weight: 600; font-size: 1.4rem;
  margin: 0 0 .4rem; letter-spacing: -0.005em;
}
.trending p.muted { margin: 0 0 1.25rem; max-width: 62ch; font-size: 14.5px; }
.kw-cloud {
  display: flex; flex-wrap: wrap; gap: .5rem .55rem;
}
.kw-chip-big {
  font-size: 13px;
  padding: 6px 12px;
  letter-spacing: .01em;
  background: #fff;
}
.kw-chip-big .kw-count {
  font-size: 10px;
  color: var(--muted);
  background: var(--paper);
  padding: 1px 6px;
  border-radius: 99px;
  margin-left: .15em;
}
.kw-chip-big:hover .kw-count { color: rgba(255,255,255,.75); background: rgba(255,255,255,.18); }

/* Make the category tag clickable on results */
a.tag-category { border: 1px solid var(--rule); }
a.tag-category:hover { background: #143a53; }

/* Download CSV link */
.export-link {
  margin-left: auto;
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px; letter-spacing: .1em; text-transform: uppercase;
  color: var(--ink-soft);
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: var(--paper-2);
}
.export-link:hover { color: var(--rule); border-color: var(--rule); background: #fff; }
.export-link::before { content: "↓ "; color: var(--accent); }

/* Hints block ------------------------------------------------------------- */
.hints { margin-top: 2.5rem; }
.hints h2 {
  font-family: "IBM Plex Mono", monospace;
  font-size: 12px; text-transform: uppercase; letter-spacing: .14em;
  color: var(--muted); font-weight: 500; margin: 0 0 .75rem;
}
.hints ul { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: .6rem; }
.hints li a {
  display: inline-block;
  padding: .55rem .9rem;
  background: var(--paper-2); border: 1px solid var(--line);
  border-radius: 3px; font-size: 14px; color: var(--ink-soft);
}
.hints li a:hover { background: var(--accent-soft); color: #5e3f17; border-color: var(--accent); }

/* Author page ------------------------------------------------------------- */
.author-head { margin-bottom: 2rem; }
.author-name {
  font-family: "Fraunces", Georgia, serif;
  font-weight: 700; font-size: clamp(1.8rem, 4vw, 2.6rem);
  margin: .3rem 0; letter-spacing: -0.01em;
}
.author-head .meta { color: var(--muted); margin: 0; }
.back { font-size: 14px; color: var(--rule); }

/* Network page ------------------------------------------------------------ */
.network-head { margin-bottom: 1.5rem; max-width: 100ch; }
.network-title {
  font-family: "Fraunces", Georgia, serif;
  font-weight: 600; font-size: clamp(1.8rem, 3.8vw, 2.5rem);
  margin: .3rem 0 .6rem; letter-spacing: -0.01em;
}
.network-controls {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr 1.4fr 1.4fr auto;
  gap: 1rem 1.25rem; align-items: end;
  padding: 1.5rem 1.5rem 1.5rem 2rem;
  background: var(--paper);
  border: 1px solid var(--line);
  border-left: 4px solid var(--rule);
  border-radius: 4px;
  box-shadow: 0 1px 0 rgba(0,0,0,0.02), 0 12px 28px -20px rgba(27,73,101,.4);
  margin-bottom: 1rem;
}
.network-stats {
  font-family: "IBM Plex Mono", monospace;
  font-size: 12px; color: var(--muted);
  margin-bottom: 1rem; letter-spacing: .04em;
}
.network-stage {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: 1.25rem;
  min-height: 760px;
}
#network {
  height: 860px;
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: 4px;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.5);
}
.network-side {
  padding: 1.25rem 1.25rem 1.5rem;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 4px;
  max-height: 860px; overflow-y: auto;
}
.network-side h3 {
  font-family: "Fraunces", Georgia, serif;
  font-weight: 600; font-size: 1.3rem; margin: 0 0 .3rem;
  letter-spacing: -0.005em;
}
.muted { color: var(--muted); }
.network-side .poster-list.compact .poster-item {
  grid-template-columns: 60px 1fr;
  gap: .75rem; padding: .9rem 0;
}
.network-side .poster-title { font-size: 1rem; margin-bottom: .3rem; }
.network-side .poster-authors { font-size: 12.5px; margin-bottom: .4rem; }
.network-side .tag { font-size: 10px; padding: 2px 6px; }

.legend { margin-top: 1.25rem; padding-top: 1rem; border-top: 1px solid var(--line); }
.legend h4 {
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--muted); font-weight: 500; margin: 0 0 .6rem;
}
.legend-row { display: flex; align-items: center; gap: .5rem; font-size: 12.5px; color: var(--ink-soft); margin-bottom: .25rem; }
.swatch { width: 12px; height: 12px; border-radius: 50%; border: 1px solid rgba(0,0,0,.2); }

/* Responsive -------------------------------------------------------------- */
@media (max-width: 900px) {
  .banner-inner { flex-direction: column; align-items: flex-start; gap: 1rem; padding: 1rem 1rem; }
  .banner-logo-combined { height: 48px; }
  .subbar-inner { padding: .6rem 1rem; gap: .75rem; flex-wrap: wrap; }
  .primary-nav { gap: 1rem; }
  .search-card { grid-template-columns: 1fr; }
  .network-controls { grid-template-columns: 1fr; }
  .network-stage { grid-template-columns: 1fr; }
  .network-side { max-height: none; }
  #network { height: 520px; }
  .poster-item { grid-template-columns: 1fr; }
  .poster-index { flex-direction: row; }
}

/* Top Collaborators panel ------------------------------------------------ */
.side-tabs {
  display: flex; gap: 0; margin: -.25rem -.25rem 1rem;
  border-bottom: 1px solid var(--line);
}
.side-tab {
  flex: 1;
  background: transparent;
  border: none;
  padding: .65rem .4rem;
  font-family: "IBM Plex Mono", monospace;
  font-size: 10px; letter-spacing: .12em; text-transform: uppercase;
  color: var(--muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: color .15s, border-color .15s;
}
.side-tab:hover { color: var(--ink-soft); }
.side-tab.active { color: var(--ink); border-bottom-color: var(--rule); }

.hub-group { margin-bottom: 1.25rem; }
.hub-group h4 {
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px; letter-spacing: .12em; text-transform: uppercase;
  color: var(--ink); font-weight: 500;
  margin: 0 0 .2rem;
}
.hub-hint {
  font-size: 12px; color: var(--muted);
  margin: 0 0 .5rem;
  font-style: italic;
}
.hub-list {
  list-style: none; padding: 0; margin: 0;
  counter-reset: hub;
}
.hub-list li { counter-increment: hub; margin-bottom: .15rem; }
.hub-row {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: .5rem; width: 100%;
  background: transparent;
  border: none;
  padding: .4rem .5rem;
  border-radius: 2px;
  cursor: pointer;
  text-align: left;
  font-family: "IBM Plex Sans", sans-serif;
  font-size: 13px;
  color: var(--ink);
  transition: background .12s;
}
.hub-row::before {
  content: counter(hub);
  font-family: "IBM Plex Mono", monospace;
  font-size: 10px; color: var(--muted);
  min-width: 18px;
}
.hub-row:hover { background: var(--paper); }
.hub-name { flex: 1; }
.hub-val {
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px;
  color: var(--muted);
  letter-spacing: .04em;
}