/* CPDSE — Research Environment page
   -----------------------------------------------------------------------
   Three sections: Departments · Group Leaders · PhD Students
   Loaded only on /research-units/ via _layouts/research-units.html */

/* ── Shared section modifier ─────────────────────────────────── */
.ru-sage        { background: var(--color-sage-green, #5F7D61); color: #F9F9F9; }
.ru-soft-white  { background: var(--color-soft-white, #F9F9F9); }

/* ── Shared section header ───────────────────────────────────── */
.ru-header {
  margin-bottom: var(--space-md, 2.5rem);
}
.ru-eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-forest-green, #3C5E3E);
  margin-bottom: 0.6rem;
}
.ru-headline {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.2vw, 2.6rem);
  font-weight: 400;
  line-height: 1.15;
  color: var(--color-forest-green, #3C5E3E);
  margin: 0 0 0.75rem;
}
.ru-lead {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--muted, #8a9490);
  max-width: 68ch;
  margin: 0;
}

/* ══ SECTION 1 — DEPARTMENTS ════════════════════════════════════ */
.ru-dept-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.ru-dept-card {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 0.9rem 1rem;
  background: var(--color-soft-white, #F9F9F9);
  border: 1px solid var(--border, #E7E2D1);
  border-radius: 0;
  text-decoration: none;
  color: inherit;
  transition: box-shadow 0.18s ease, transform 0.18s ease;
}
.ru-dept-card:hover {
  box-shadow: none;
  transform: translateY(-3px);
}
.ru-dept-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.ru-dept-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 4px;
  align-self: flex-start;
}
.ru-dept-badge--ucph {
  background: rgba(169,187,170,0.35);
  color: var(--color-forest-green, #3C5E3E);
}
.ru-dept-badge--sdu {
  background: rgba(214,193,124,0.4);
  color: #4a3d10;
}

.ru-dept-name {
  font-family: var(--font-display);
  font-size: 0.98rem;
  font-weight: 400;
  line-height: 1.3;
  color: var(--color-forest-green, #3C5E3E);
  margin: 0;
  flex: 1;
}

/* Override page-section heading cascade — cards have solid soft-white bg */
.page-section--soft-white .ru-dept-name,
.page-section--sage-green .ru-dept-name,
.page-section--sage-green .ru-phd-name { color: var(--color-forest-green, #3C5E3E); }

.ru-dept-desc {
  font-size: 0.84rem;
  line-height: 1.55;
  color: var(--color-charcoal, #333333);
  opacity: 0.78;
  margin: 0;
}

.ru-dept-cta {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.06em;
  color: var(--color-forest-green, #3C5E3E);
  opacity: 0.7;
  white-space: nowrap;
}

/* ══ SECTION 2 — GROUP LEADERS (directory table) ════════════════ */
.ru-leader-group-heading {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-forest-green, #3C5E3E);
  opacity: 0.6;
  margin: 2.5rem 0 0;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--border, #E7E2D1);
}
.ru-leader-group-heading:first-child {
  margin-top: 0;
}

.ru-leaders-table {
  border-top: 1px solid var(--border, #E7E2D1);
  width: 100%;
}

.ru-leader-row {
  display: grid;
  grid-template-columns: 1fr 1.8fr;
  gap: 3rem;
  padding: 2rem 0;
  border-bottom: 1px solid var(--border, #E7E2D1);
  align-items: start;
}

/* Left column — identity */
.ru-leader-left {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.ru-leader-avatar {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--color-forest-green, #3C5E3E);
  color: var(--color-soft-white, #F9F9F9);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.ru-leader-avatar--photo {
  width: 64px;
  height: 64px;
  background: transparent;
  overflow: hidden;
}

.ru-leader-avatar--photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
  display: block;
}

.ru-leader-meta { flex: 1; }

.ru-leader-name {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 400;
  color: var(--color-forest-green, #3C5E3E);
  margin: 0 0 0.25rem;
  line-height: 1.25;
}

.ru-leader-dept {
  font-size: 0.82rem;
  color: var(--muted, #8a9490);
  margin: 0 0 0.4rem;
  line-height: 1.4;
}

.ru-leader-uni {
  font-family: var(--font-mono);
  font-size: 0.63rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  display: inline-block;
  padding: 2px 6px;
  border-radius: 3px;
}
.ru-leader-uni--ucph {
  background: rgba(169,187,170,0.35);
  color: var(--color-forest-green, #3C5E3E);
}
.ru-leader-uni--sdu {
  background: rgba(214,193,124,0.4);
  color: #4a3d10;
}

/* Right column — quote + link */
.ru-leader-right {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding-top: 0.2rem;
}

.ru-leader-quote {
  font-style: italic;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--charcoal, #333333);
  margin: 0;
}

.ru-leader-link {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--color-forest-green, #3C5E3E);
  text-decoration: none;
  align-self: flex-start;
}
.ru-leader-link:hover { text-decoration: underline; }

/* ══ SECTION 3 — PHD STUDENTS ═══════════════════════════════════ */
.ru-phd-intro {
  max-width: 60ch;
  margin-bottom: var(--space-md, 2.5rem);
}

.ru-phd-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.ru-phd-card {
  background: var(--color-soft-white, #F9F9F9);
  border: 1px solid var(--border, #E7E2D1);
  border-radius: 0;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.ru-phd-number {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 400;
  color: rgba(60,94,62,0.18);
  line-height: 1;
  letter-spacing: -0.02em;
}

.ru-phd-name {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 400;
  color: var(--color-forest-green, #3C5E3E);
  margin: 0;
}

.ru-phd-supervisor {
  font-size: 0.8rem;
  color: var(--color-charcoal, #333333);
  opacity: 0.75;
  margin: 0;
  text-align: left;
}
.ru-phd-supervisor strong {
  color: var(--color-charcoal, #333333);
  opacity: 1;
  font-weight: 600;
}

.ru-phd-project {
  font-style: italic;
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--charcoal, #333333);
  margin: 0;
}

/* ── Responsive ──────────────────────────────────────────────── */
@media (max-width: 1100px) {
  .ru-dept-grid { grid-template-columns: repeat(2, 1fr); }
  .ru-phd-grid { grid-template-columns: repeat(2, 1fr); }
  .ru-leader-row { grid-template-columns: 1fr 1.4fr; gap: 2rem; }
}

@media (max-width: 700px) {
  .ru-dept-grid,
  .ru-phd-grid { grid-template-columns: 1fr; }
  .ru-leader-row {
    grid-template-columns: 1fr;
    gap: 1rem;
    padding: 1.5rem 0;
  }
}