/* ============================================================
   SEMENOV LAB — Design System & Component Styles
   ============================================================ */

/* ---- Tokens ---- */
:root, [data-theme="light"] {
  /* Type scale */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);

  /* Spacing */
  --space-1: 0.25rem; --space-2: 0.5rem; --space-3: 0.75rem;
  --space-4: 1rem;    --space-5: 1.25rem; --space-6: 1.5rem;
  --space-8: 2rem;    --space-10: 2.5rem; --space-12: 3rem;
  --space-16: 4rem;   --space-20: 5rem;   --space-24: 6rem;
  --space-32: 8rem;

  /* Palette — Clinical Navy + Teal */
  --color-bg:             #f5f7fa;
  --color-surface:        #ffffff;
  --color-surface-2:      #f0f4f8;
  --color-surface-offset: #e8edf3;
  --color-divider:        #d1d9e6;
  --color-border:         #c5d0e0;

  --color-text:           #0f1f3d;
  --color-text-muted:     #4a5568;
  --color-text-faint:     #94a3b8;
  --color-text-inverse:   #ffffff;

  --color-primary:        #0077a8;
  --color-primary-hover:  #005f86;
  --color-primary-active: #004a6b;
  --color-primary-highlight: #cce6f0;

  --color-navy:           #1a3a6b;
  --color-navy-dark:      #0f2548;
  --color-teal:           #0077a8;
  --color-teal-light:     #00a8c8;

  --color-accent:         #e8702a;  /* warm orange accent for CTAs */
  --color-accent-hover:   #c85a1a;

  /* Radii, shadows, transitions */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 350ms cubic-bezier(0.16, 1, 0.3, 1);

  --shadow-sm: 0 1px 3px rgba(15, 31, 61, 0.08), 0 1px 2px rgba(15, 31, 61, 0.06);
  --shadow-md: 0 4px 16px rgba(15, 31, 61, 0.10), 0 2px 6px rgba(15, 31, 61, 0.06);
  --shadow-lg: 0 12px 40px rgba(15, 31, 61, 0.14), 0 4px 12px rgba(15, 31, 61, 0.08);
  --shadow-xl: 0 24px 60px rgba(15, 31, 61, 0.18), 0 8px 20px rgba(15, 31, 61, 0.10);

  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;

  --font-display: 'Cabinet Grotesk', 'Helvetica Neue', sans-serif;
  --font-body: 'Satoshi', 'Helvetica Neue', sans-serif;
}

[data-theme="dark"] {
  --color-bg:             #0a0f1e;
  --color-surface:        #111827;
  --color-surface-2:      #1a2236;
  --color-surface-offset: #1e2a42;
  --color-divider:        #263352;
  --color-border:         #2d3d5c;

  --color-text:           #e2e8f4;
  --color-text-muted:     #8fa3c4;
  --color-text-faint:     #4a5f80;
  --color-text-inverse:   #0a0f1e;

  --color-primary:        #38b2d8;
  --color-primary-hover:  #5bc5e5;
  --color-primary-active: #7dd4ee;
  --color-primary-highlight: #0f2d40;

  --color-navy:           #2a5298;
  --color-teal:           #38b2d8;
  --color-teal-light:     #5bc5e5;
  --color-accent:         #f0872e;
  --color-accent-hover:   #e06a18;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.5);
  --shadow-xl: 0 24px 60px rgba(0,0,0,0.6);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:             #0a0f1e;
    --color-surface:        #111827;
    --color-surface-2:      #1a2236;
    --color-surface-offset: #1e2a42;
    --color-divider:        #263352;
    --color-border:         #2d3d5c;
    --color-text:           #e2e8f4;
    --color-text-muted:     #8fa3c4;
    --color-text-faint:     #4a5f80;
    --color-text-inverse:   #0a0f1e;
    --color-primary:        #38b2d8;
    --color-primary-hover:  #5bc5e5;
    --color-primary-active: #7dd4ee;
    --color-primary-highlight: #0f2d40;
    --color-accent:         #f0872e;
    --color-accent-hover:   #e06a18;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.5);
  }
}

/* ============================================================
   LAYOUT UTILITIES
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: clamp(var(--space-4), 4vw, var(--space-12));
}
.container--narrow { max-width: var(--content-default); }

/* ============================================================
   HEADER & NAV
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10000;
  background: color-mix(in oklab, var(--color-bg) 92%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-divider);
  transition: box-shadow var(--transition-slow);
}
.site-header--scrolled { box-shadow: var(--shadow-md); }

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: var(--space-6);
}

.logo-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  flex-shrink: 0;
}
.logo-img {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  object-fit: contain;
  background: white;
  padding: 3px;
}
.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}
.logo-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-sm);
  color: var(--color-navy);
  letter-spacing: -0.02em;
}
[data-theme="dark"] .logo-name { color: var(--color-text); }
.logo-sub {
  font-family: var(--font-body);
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  flex-wrap: nowrap;
  overflow: visible;
}
.nav-link {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  padding: var(--space-2) var(--space-2);
  border-radius: var(--radius-md);
  white-space: nowrap;
  flex-shrink: 0;
  transition: color var(--transition-interactive), background var(--transition-interactive);
}
.nav-link:hover { color: var(--color-primary); background: var(--color-primary-highlight); }
.nav-link.active { color: var(--color-primary); font-weight: 600; }

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}
.header-actions .btn-primary { white-space: nowrap; flex-shrink: 0; min-width: max-content; }

.btn { display: inline-flex; align-items: center; gap: var(--space-2); font-family: var(--font-body); font-weight: 600; font-size: var(--text-sm); text-decoration: none; border-radius: var(--radius-full); cursor: pointer; transition: all var(--transition-interactive); border: none; line-height: 1; }
.btn-primary { background: var(--color-accent); color: white; padding: var(--space-3) var(--space-6); white-space: nowrap; }
.btn-primary:hover { background: var(--color-accent-hover); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-outline { background: transparent; color: var(--color-primary); border: 1.5px solid var(--color-primary); padding: calc(var(--space-3) - 1.5px) calc(var(--space-6) - 1.5px); }
.btn-outline:hover { background: var(--color-primary-highlight); }
.btn-ghost { background: transparent; color: var(--color-text-muted); padding: var(--space-2) var(--space-3); border-radius: var(--radius-md); }
.btn-ghost:hover { color: var(--color-text); background: var(--color-surface-2); }

.theme-toggle {
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  cursor: pointer;
  background: none; border: none;
  transition: all var(--transition-interactive);
}
.theme-toggle:hover { background: var(--color-surface-2); color: var(--color-text); }

.mobile-toggle {
  display: none;
  width: 40px; height: 40px;
  align-items: center; justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  cursor: pointer;
  background: none; border: none;
}

/* ============================================================
   HERO — HOMEPAGE
   ============================================================ */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  z-index: 1;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('../images/hero-banner.jpg');
  background-size: cover;
  background-position: center 30%;
  z-index: 0;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    105deg,
    rgba(10, 24, 58, 0.88) 0%,
    rgba(10, 24, 58, 0.72) 50%,
    rgba(0, 119, 168, 0.35) 100%
  );
  z-index: 1;
}
.hero-content {
  position: relative;
  z-index: 2;
  padding-block: clamp(var(--space-16), 10vw, var(--space-32));
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-teal-light);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: var(--space-5);
}
.hero-eyebrow-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--color-teal-light);
}
.hero-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-2xl);
  color: #ffffff;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-6);
  max-width: 14ch;
}
.hero-title span { color: var(--color-teal-light); }
.hero-desc {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: rgba(255,255,255,0.82);
  line-height: 1.7;
  max-width: 52ch;
  margin-bottom: var(--space-10);
}
.hero-actions { display: flex; flex-wrap: wrap; gap: var(--space-4); }
.btn-hero-primary {
  background: var(--color-accent);
  color: white;
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: var(--text-base);
  text-decoration: none;
  display: inline-flex; align-items: center; gap: var(--space-2);
  transition: all var(--transition-interactive);
}
.btn-hero-primary:hover { background: var(--color-accent-hover); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(232, 112, 42, 0.4); }
.btn-hero-outline {
  background: rgba(255,255,255,0.12);
  color: white;
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: var(--text-base);
  text-decoration: none;
  border: 1.5px solid rgba(255,255,255,0.35);
  display: inline-flex; align-items: center; gap: var(--space-2);
  backdrop-filter: blur(8px);
  transition: all var(--transition-interactive);
}
.btn-hero-outline:hover { background: rgba(255,255,255,0.2); border-color: rgba(255,255,255,0.6); }

.hero-stats {
  display: flex;
  gap: clamp(var(--space-8), 5vw, var(--space-16));
  margin-top: var(--space-16);
  padding-top: var(--space-10);
  border-top: 1px solid rgba(255,255,255,0.15);
  flex-wrap: wrap;
}
.hero-stat-value {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-xl);
  color: white;
  letter-spacing: -0.02em;
  line-height: 1;
}
.hero-stat-value span { color: var(--color-teal-light); }
.hero-stat-label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.65);
  margin-top: var(--space-1);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ============================================================
   SECTION UTILITY
   ============================================================ */
.section { padding-block: clamp(var(--space-16), 8vw, var(--space-24)); }
.section-alt { background: var(--color-surface-2); }
.section-dark {
  background: var(--color-navy);
  color: white;
}
[data-theme="dark"] .section-dark {
  background: var(--color-surface);
}

.section-eyebrow {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: var(--space-3);
  display: flex; align-items: center; gap: var(--space-2);
}
.section-eyebrow::before {
  content: '';
  display: inline-block;
  width: 20px; height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
}
.section-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-xl);
  color: var(--color-text);
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: var(--space-4);
}
.section-dark .section-title,
.section-dark .section-eyebrow { color: white; }
.section-dark .section-eyebrow::before { background: var(--color-teal-light); }
.section-desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 60ch;
  line-height: 1.7;
}
.section-dark .section-desc { color: rgba(255,255,255,0.72); }
.section-header { margin-bottom: clamp(var(--space-10), 4vw, var(--space-16)); }
.section-header--center { text-align: center; }
.section-header--center .section-eyebrow { justify-content: center; }
.section-header--center .section-desc { margin-inline: auto; }

/* ============================================================
   RESEARCH CARDS
   ============================================================ */
.research-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-6);
}
.research-card {
  background: var(--color-surface);
  border-radius: var(--radius-2xl);
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: transform var(--transition-slow), box-shadow var(--transition-slow);
}
.research-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-xl); }
.research-card-img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}
.research-card-body { padding: var(--space-8); }
.research-card-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary);
  background: var(--color-primary-highlight);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.research-card-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  color: var(--color-text);
  margin-bottom: var(--space-3);
  line-height: 1.25;
}
.research-card-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
}
.research-card-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-5);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
  transition: gap var(--transition-interactive);
}
.research-card-link:hover { gap: var(--space-3); }

/* ============================================================
   TEAM CARDS
   ============================================================ */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-6);
}
.team-card {
  background: var(--color-surface);
  border-radius: var(--radius-2xl);
  border: 1px solid var(--color-border);
  padding: var(--space-8);
  text-align: center;
  transition: transform var(--transition-slow), box-shadow var(--transition-slow);
  position: relative;
  overflow: hidden;
}
.team-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--color-primary-highlight) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--transition-slow);
}
.team-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.team-card:hover::before { opacity: 1; }

.team-avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  object-position: top center;
  margin-inline: auto;
  margin-bottom: var(--space-5);
  border: 3px solid var(--color-border);
  box-shadow: var(--shadow-md);
  position: relative;
  z-index: 1;
  transition: border-color var(--transition-slow);
}
.team-card:hover .team-avatar { border-color: var(--color-primary); }

.team-card-pi .team-avatar {
  width: 140px;
  height: 140px;
  border-color: var(--color-primary);
}

.team-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-base);
  color: var(--color-text);
  margin-bottom: var(--space-1);
  position: relative; z-index: 1;
}
.team-role {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-3);
  position: relative; z-index: 1;
}
.team-bio {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  position: relative; z-index: 1;
}
.team-links {
  display: flex;
  justify-content: center;
  gap: var(--space-3);
  margin-top: var(--space-4);
  position: relative; z-index: 1;
}
.team-link {
  display: flex; align-items: center; justify-content: center;
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--color-surface-2);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: all var(--transition-interactive);
}
.team-link:hover { background: var(--color-primary); color: white; }

/* ============================================================
   PUBLICATIONS
   ============================================================ */
.pub-filters {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-bottom: var(--space-10);
}
.pub-filter-btn {
  font-size: var(--text-sm);
  font-weight: 600;
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-full);
  border: 1.5px solid var(--color-border);
  background: transparent;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition-interactive);
}
.pub-filter-btn:hover, .pub-filter-btn.active {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}
.pub-list { display: flex; flex-direction: column; gap: var(--space-4); }
.pub-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6) var(--space-8);
  transition: transform var(--transition-slow), box-shadow var(--transition-slow), border-color var(--transition-slow);
}
.pub-item:hover { transform: translateX(4px); box-shadow: var(--shadow-md); border-color: var(--color-primary); }
.pub-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
  align-items: center;
}
.pub-journal {
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.pub-year {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-faint);
  background: var(--color-surface-2);
  padding: 2px var(--space-2);
  border-radius: var(--radius-full);
}
.pub-citations {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-accent);
  display: flex; align-items: center; gap: 4px;
}
.pub-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-base);
  color: var(--color-text);
  margin-bottom: var(--space-2);
  line-height: 1.35;
}
.pub-title a { color: inherit; text-decoration: none; }
.pub-title a:hover { color: var(--color-primary); }
.pub-authors {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
}
.pub-authors strong { color: var(--color-primary); font-weight: 700; }

/* ============================================================
   IMAGE FEATURE SECTIONS
   ============================================================ */
.img-feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
}
.img-feature--reverse { direction: rtl; }
.img-feature--reverse > * { direction: ltr; }
.img-feature-img {
  width: 100%;
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
  object-fit: cover;
  aspect-ratio: 4/3;
}
.img-feature-content {}

/* ============================================================
   FULL-BLEED IMAGE DIVIDER
   ============================================================ */
.img-divider {
  position: relative;
  height: clamp(280px, 35vw, 480px);
  overflow: hidden;
}
.img-divider-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.img-divider-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, rgba(10,24,58,0.7) 0%, rgba(0,119,168,0.3) 100%);
}
.img-divider-text {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-inline: clamp(var(--space-8), 8vw, var(--space-24));
  color: white;
}
.img-divider-text h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-xl);
  letter-spacing: -0.02em;
  color: white;
  max-width: 18ch;
  margin-bottom: var(--space-4);
}
.img-divider-text p {
  font-size: var(--text-base);
  color: rgba(255,255,255,0.8);
  max-width: 50ch;
}

/* ============================================================
   AFFILIATION LOGOS
   ============================================================ */
.affiliations-bar {
  padding-block: var(--space-10);
  border-top: 1px solid var(--color-divider);
  border-bottom: 1px solid var(--color-divider);
}
.affiliations-label {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  text-align: center;
  margin-bottom: var(--space-6);
}
.affiliations-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: clamp(var(--space-6), 4vw, var(--space-12));
}
.affiliation-item {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  opacity: 0.7;
  transition: opacity var(--transition-interactive);
  white-space: nowrap;
}
.affiliation-item:hover { opacity: 1; }

/* ============================================================
   STATS STRIP
   ============================================================ */
.stats-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-1);
}
.stat-item {
  background: var(--color-surface);
  padding: var(--space-8) var(--space-6);
  text-align: center;
  border: 1px solid var(--color-border);
}
.stat-item:first-child { border-radius: var(--radius-xl) 0 0 var(--radius-xl); }
.stat-item:last-child { border-radius: 0 var(--radius-xl) var(--radius-xl) 0; }
.stat-value {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-2xl);
  color: var(--color-primary);
  letter-spacing: -0.03em;
  line-height: 1;
}
.stat-label {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-top: var(--space-2);
}

/* ============================================================
   HIGHLIGHT / PULL QUOTE
   ============================================================ */
.pull-quote {
  background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-primary) 100%);
  border-radius: var(--radius-2xl);
  padding: clamp(var(--space-8), 4vw, var(--space-12));
  color: white;
  position: relative;
  overflow: hidden;
}
.pull-quote::before {
  content: '"';
  position: absolute;
  top: -20px; left: var(--space-6);
  font-size: 12rem;
  font-family: var(--font-display);
  font-weight: 800;
  color: rgba(255,255,255,0.08);
  line-height: 1;
  pointer-events: none;
}
.pull-quote-text {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  line-height: 1.4;
  color: white;
  margin-bottom: var(--space-4);
  position: relative; z-index: 1;
}
.pull-quote-attr {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.72);
  position: relative; z-index: 1;
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  background: var(--color-navy);
  color: rgba(255,255,255,0.7);
  padding-block: clamp(var(--space-12), 6vw, var(--space-20));
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: clamp(var(--space-8), 4vw, var(--space-16));
  margin-bottom: var(--space-12);
}
.footer-brand {}
.footer-logo {
  display: flex; align-items: center; gap: var(--space-3);
  margin-bottom: var(--space-4);
}
.footer-logo-img {
  width: 40px; height: 40px;
  object-fit: contain;
  border-radius: var(--radius-sm);
  background: white;
  padding: 3px;
}
.footer-logo-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-base);
  color: white;
  letter-spacing: -0.02em;
}
.footer-tagline {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.55);
  line-height: 1.6;
  max-width: 36ch;
  margin-bottom: var(--space-6);
}
.footer-contact-item {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.6);
  margin-bottom: var(--space-2);
  display: flex; align-items: flex-start; gap: var(--space-2);
}
.footer-contact-item a { color: rgba(255,255,255,0.8); text-decoration: none; }
.footer-contact-item a:hover { color: white; }

.footer-col-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-sm);
  color: white;
  margin-bottom: var(--space-5);
  letter-spacing: -0.01em;
}
.footer-links { list-style: none; display: flex; flex-direction: column; gap: var(--space-3); }
.footer-links a {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.6);
  text-decoration: none;
  transition: color var(--transition-interactive);
}
.footer-links a:hover { color: white; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.12);
  padding-top: var(--space-8);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
}
.footer-copyright {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.4);
}
.footer-badges {
  display: flex; gap: var(--space-3); align-items: center;
}
.footer-badge {
  font-size: var(--text-xs);
  font-weight: 600;
  color: rgba(255,255,255,0.5);
  border: 1px solid rgba(255,255,255,0.2);
  padding: 2px var(--space-3);
  border-radius: var(--radius-full);
}

/* ============================================================
   CONTACT PAGE
   ============================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: start;
}
.contact-form-wrap {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: var(--space-10);
}
.form-group { margin-bottom: var(--space-5); }
.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}
.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
  outline: none;
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-highlight);
}
.form-textarea { resize: vertical; min-height: 140px; line-height: 1.6; }

/* ============================================================
   PAGE HERO (INNER PAGES)
   ============================================================ */
.page-hero {
  background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-primary) 100%);
  color: white;
  padding-block: clamp(var(--space-12), 6vw, var(--space-20));
}
.page-hero-eyebrow {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-teal-light);
  margin-bottom: var(--space-3);
}
.page-hero-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-2xl);
  color: white;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: var(--space-5);
}
.page-hero-desc {
  font-size: var(--text-base);
  color: rgba(255,255,255,0.8);
  max-width: 60ch;
  line-height: 1.7;
}

/* ============================================================
   JOIN PAGE
   ============================================================ */
.position-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  margin-bottom: var(--space-5);
  border-left: 4px solid var(--color-primary);
  transition: box-shadow var(--transition-slow);
}
.position-card:hover { box-shadow: var(--shadow-md); }
.position-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  color: var(--color-text);
  margin-bottom: var(--space-2);
}
.position-tag {
  display: inline-flex;
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-primary);
  background: var(--color-primary-highlight);
  padding: 2px var(--space-3);
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-4);
}
.position-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
  margin-bottom: var(--space-4);
}
.position-reqs {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  padding-left: var(--space-5);
}
.position-reqs li { margin-bottom: var(--space-2); }

/* ============================================================
   SCROLL REVEAL
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.revealed { opacity: 1; transform: none; }
@media (max-width: 600px) { .reveal { opacity: 1; transform: none; } }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ============================================================
   MOBILE NAV
   ============================================================ */
@media (max-width: 768px) {
  /* Header */
  .header-inner {
    position: relative;
    height: 64px;
    gap: var(--space-2);
  }
  .logo-link {
    flex: 0 1 auto;
    max-width: calc(100% - 100px);
    min-width: 0;
    z-index: 1;
    pointer-events: auto;
  }
  .logo-sub { display: none; }
  .header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    flex-shrink: 0;
    z-index: 2;
    position: relative;
  }
  .header-actions .btn-primary { display: none; }
  .mobile-toggle {
    display: flex !important;
    position: relative;
    z-index: 200;
    pointer-events: all;
    cursor: pointer;
  }
  .mobile-toggle svg, .mobile-toggle svg * { pointer-events: none; }
  /* Nav drawer — appended to body by JS */
  .main-nav {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-bg);
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-6);
    gap: var(--space-2);
    border-top: 1px solid var(--color-divider);
    z-index: 99999;
    overflow-y: auto;
    isolation: isolate;
  }
  .main-nav.open { display: flex !important; }
  .nav-link { padding: var(--space-4); font-size: var(--text-base); border-radius: var(--radius-md); }
  /* Layout */
  .img-feature { grid-template-columns: 1fr; }
  .img-feature--reverse { direction: ltr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .stats-strip { grid-template-columns: 1fr 1fr; }
  .stat-item:first-child { border-radius: var(--radius-xl) var(--radius-xl) 0 0; }
  .stat-item:last-child { border-radius: 0 0 var(--radius-xl) var(--radius-xl); }
  /* Hero text */
  .hero-title { font-size: clamp(2rem, 8vw, 3rem); }
  .hero-desc { font-size: var(--text-base); }
  /* Research cards */
  .research-grid { grid-template-columns: 1fr; }
  /* Team grid */
  .team-grid { grid-template-columns: 1fr 1fr; }
  /* Sections */
  .section { padding: var(--space-12) 0; }
}

@media (max-width: 500px) {
  .footer-grid { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: 1fr 1fr; }
  .hero-stats { gap: var(--space-8); }
  .hero-actions { flex-direction: column; align-items: flex-start; }
}

@media (min-width: 769px) and (max-width: 1050px) {
  .nav-link { padding: var(--space-1) var(--space-2); font-size: 11px; }
  .header-actions .btn-primary { display: none; }
  .logo-sub { display: none; }
}