:root {
  --page-bg: #F5F7FB;
  --card-bg: #FFFFFF;
  --text: #0F172A;
  --text-secondary: #1E293B;
  --text-muted: #334155;
  --border: rgba(15,23,42,0.08);
  --group-card-bg: #FFFFFF;
  --group-card-border: rgba(15,23,42,0.08);
}
[data-theme="dark"] {
  --page-bg: #0F2147;
  --card-bg: #132A55;
  --text: #FFFFFF;
  --text-secondary: rgba(255,255,255,0.95);
  --text-muted: rgba(255,255,255,0.88);
  --border: rgba(255,255,255,0.08);
  --group-card-bg: #132A55;
  --group-card-border: rgba(255,255,255,0.08);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html { background: var(--page-bg); min-height: 100%; }
[data-theme="light"] html {
  background:
    radial-gradient(ellipse 80% 50% at 20% 0%, rgba(59,130,246,0.08), transparent 60%),
    radial-gradient(ellipse 70% 50% at 80% 100%, rgba(139,92,246,0.07), transparent 60%),
    linear-gradient(180deg, #F8FAFC 0%, #EEF2F8 100%);
  background-attachment: fixed;
}
[data-theme="dark"] html {
  background:
    radial-gradient(ellipse 80% 50% at 20% 0%, rgba(59,130,246,0.18), transparent 60%),
    radial-gradient(ellipse 70% 50% at 80% 100%, rgba(139,92,246,0.15), transparent 60%),
    linear-gradient(180deg, #0B1730 0%, #0F2147 100%);
  background-attachment: fixed;
}
body {
  font-family: 'Source Sans 3', system-ui, -apple-system, sans-serif;
  color: var(--text);
  display: flex;
  justify-content: center;
  padding: 32px 20px;
}
.outer { width: 100%; max-width: 1080px; }
/* Responsive expansion on wider viewports (fullscreen modals, large monitors) */
@media (min-width: 1400px) { .outer { max-width: 1320px; } }
@media (min-width: 1700px) { .outer { max-width: 1600px; } }
@media (min-width: 2000px) { .outer { max-width: 1880px; } }
.card { padding: 12px; position: relative; }
.title-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin: 0 12px 10px;
}
.title {
  font-size: 44px;
  font-weight: 900;
  letter-spacing: -0.035em;
  line-height: 1.08;
  color: var(--text);
  flex: 1;
  min-width: 0;
}
.source-link {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  padding: 8px 14px;
  border-radius: 999px;
  margin-top: 8px;
  transition: background 0.15s ease, transform 0.15s ease;
}
[data-theme="light"] .source-link {
  color: var(--text-muted);
  background: rgba(15,23,42,0.05);
  border: 1px solid rgba(15,23,42,0.08);
}
[data-theme="dark"] .source-link {
  color: var(--text-muted);
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.10);
}
.source-link:hover {
  transform: translateY(-1px);
}
[data-theme="light"] .source-link:hover { background: rgba(15,23,42,0.08); color: var(--text); }
[data-theme="dark"] .source-link:hover { background: rgba(255,255,255,0.10); color: var(--text); }
.source-link svg { width: 12px; height: 12px; }
.subtitle {
  font-size: 18px;
  font-weight: 400;
  color: var(--text-muted);
  margin: 0 12px 28px;
  line-height: 1.5;
  max-width: 820px;
}
/* Mobile: tighten title & subtitle so they don't eat half the screen */
@media (max-width: 560px) {
  .title { font-size: 28px; letter-spacing: -0.025em; }
  .subtitle { font-size: 15px; margin-bottom: 18px; }
  .title-row { gap: 10px; margin-bottom: 8px; }
  .source-link { font-size: 12px; padding: 6px 10px; }
}
/* True masonry via CSS columns — cards flow vertically with no row-height
   gaps under short groups. Cards keep their natural heights, three columns
   on wide screens, two on medium, one on mobile. */
.masonry {
  column-count: 3;
  column-gap: 18px;
  margin: 0 4px;
}
@media (max-width: 880px) { .masonry { column-count: 2; } }
@media (max-width: 560px) { .masonry { column-count: 1; } }
/* More columns on wide viewports (fullscreen, large monitors) */
@media (min-width: 1400px) { .masonry { column-count: 4; } }
@media (min-width: 1800px) { .masonry { column-count: 5; } }
@media (min-width: 2200px) { .masonry { column-count: 6; } }

/* When the landscape uses nested super-groups, top-level cards span
   full width and their sub-sections fan out in an inner grid. */
.masonry.is-nested {
  column-count: unset;
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.masonry.is-nested .group-card {
  margin-bottom: 0;
  display: block;
  width: 100%;
}
.masonry.is-nested .subgroups-wrap {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 12px;
}
@media (max-width: 560px) {
  .masonry.is-nested .subgroups-wrap { grid-template-columns: 1fr; }
}
.group-card {
  position: relative;
  border-radius: 16px;
  padding: 22px 22px 20px;
  overflow: hidden;
  /* Required so column-based masonry doesn't split a group across columns. */
  break-inside: avoid;
  -webkit-column-break-inside: avoid;
  page-break-inside: avoid;
  display: inline-block;
  width: 100%;
  margin-bottom: 18px;
}
[data-theme="light"] .group-card {
  background: #FFFFFF;
  border: 1px solid rgba(15,23,42,0.08);
  box-shadow: 0 1px 2px rgba(15,23,42,0.04), 0 8px 24px -8px rgba(15,23,42,0.10);
}
[data-theme="dark"] .group-card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.10);
  box-shadow: 0 2px 4px rgba(0,0,0,0.2), 0 12px 32px -8px rgba(0,0,0,0.35);
}
.group-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 14px;
}
.group-header-left { flex: 1; min-width: 0; }
.group-name {
  font-size: 20px;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.2;
  letter-spacing: -0.015em;
}
.group-count {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  margin-top: 6px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  opacity: 0.75;
}
.pills-wrap { display: flex; flex-wrap: wrap; gap: 5px 6px; }
.company-pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  line-height: 1;
  padding: 6px 12px 6px 7px;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.company-pill:hover {
  transform: translateY(-1px);
  box-shadow: 0 2px 6px rgba(15,23,42,0.10);
}
[data-theme="light"] .group-card > .pills-wrap .company-pill { background: #F1F5F9; }
[data-theme="dark"] .group-card > .pills-wrap .company-pill { background: rgba(255,255,255,0.07); }
.pill-logo {
  width: 18px;
  height: 18px;
  border-radius: 4px;
  object-fit: contain;
  flex-shrink: 0;
  background: rgba(128,128,128,0.06);
}
.pill-initial {
  width: 18px;
  height: 18px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-weight: 800;
  color: #fff;
  flex-shrink: 0;
  line-height: 1;
}
.pill-name { white-space: nowrap; }

/* Nested group cards (super-groups containing sub-sections) */
.group-card-nested { padding: 22px 20px 20px; }
.group-card-nested .group-header {
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(15,23,42,0.07);
  margin-bottom: 14px;
}
[data-theme="dark"] .group-card-nested .group-header {
  border-bottom-color: rgba(255,255,255,0.08);
}
.group-card-nested .group-name { font-size: 22px; }
.group-subtitle {
  font-size: 13px;
  color: var(--text-muted);
  margin: -6px 0 14px;
  line-height: 1.4;
}
.subgroups-wrap { display: flex; flex-direction: column; gap: 12px; }
.subgroup-card {
  position: relative;
  border-radius: 12px;
  padding: 12px 14px 12px;
}
[data-theme="light"] .subgroup-card { background: #F8FAFC; }
[data-theme="dark"]  .subgroup-card { background: rgba(255,255,255,0.04); }
.subgroup-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 8px;
  margin-bottom: 10px;
}
.subgroup-name {
  font-size: 14px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.25;
}
.subgroup-count {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  margin-top: 2px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  opacity: 0.75;
}
[data-theme="light"] .subgroup-card .company-pill {
  background: #FFFFFF;
  border-color: rgba(15,23,42,0.07);
}
[data-theme="dark"] .subgroup-card .company-pill {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.06);
}

.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 28px 8px 0;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}
.footer-logo { display: flex; align-items: center; }
.footer-logo svg { display: block; width: 110px; height: 26px; }
.footer-source { font-size: 12px; color: var(--text-muted); }
.logo-light { display: block; }
.logo-dark { display: none; }
[data-theme="dark"] .logo-light { display: none; }
[data-theme="dark"] .logo-dark { display: block; }