/* ============================
   BASE RESET + GLOBAL STYLES
   ============================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: var(--space-20);
}

body {
  min-height: 100dvh;
  line-height: 1.65;
  font-family: var(--font-body, sans-serif);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  transition: background-color var(--transition-slow), color var(--transition-slow);
}

img, picture, video, canvas, svg { display: block; max-width: 100%; height: auto; }
ul[role="list"], ol[role="list"] { list-style: none; }
input, button, textarea, select { font: inherit; color: inherit; }
h1, h2, h3, h4, h5, h6 { text-wrap: balance; line-height: 1.2; font-family: var(--font-display, serif); }
p, li { text-wrap: pretty; }
button { cursor: pointer; background: none; border: none; }
table { border-collapse: collapse; width: 100%; }
a { color: #0E7490; text-decoration: underline; }
a:hover { color: #0B5E75; text-decoration: underline; }

/* UI links: no underline */
.nav-links a,
.mobile-menu a,
.footer-nav-list a,
.footer-social a,
.footer-section address a,
.nav-dropdown__menu a,
.tag,
a.tag,
.guest-lecture-logo,
.stat-card a { text-decoration: none; }
.nav-links a:hover,
.mobile-menu a:hover,
.footer-nav-list a:hover,
.footer-social a:hover,
.nav-dropdown__menu a:hover { text-decoration: none; }

::selection {
  background: oklch(from var(--color-primary) l c h / 0.22);
  color: var(--color-text);
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* =============================
   TYPOGRAPHY HELPERS
   ============================= */
.display-font { font-family: var(--font-display, serif); }
.body-font    { font-family: var(--font-body, sans-serif); }

/* =============================
   LAYOUT UTILITIES
   ============================= */
.container {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: clamp(var(--space-5), 5vw, var(--space-16));
}

.container--narrow {
  max-width: var(--content-default);
}

.container--text {
  max-width: var(--content-narrow);
}

/* =============================
   NAVIGATION
   ============================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  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-interactive), background var(--transition-slow);
}

.site-header--scrolled {
  box-shadow: var(--shadow-sm);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
  padding-block: var(--space-4);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  letter-spacing: -0.01em;
  text-decoration: none;
  flex-shrink: 0;
}

.nav-logo svg { color: var(--color-primary); }

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
}

.nav-links a {
  display: block;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-family: var(--font-body);
  font-weight: 500;
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  transition: color var(--transition-interactive), background var(--transition-interactive);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-text);
  background: var(--color-surface-offset);
}

.nav-links a.active {
  color: var(--color-primary);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  transition: color var(--transition-interactive), background var(--transition-interactive), border-color var(--transition-interactive);
}

.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
  border-color: var(--color-border);
}

/* Mobile hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
}
.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

.mobile-menu {
  display: none;
  padding: var(--space-4) 0 var(--space-6);
  border-top: 1px solid var(--color-divider);
}

.mobile-menu.open { display: block; }

.mobile-menu a {
  display: block;
  padding: var(--space-3) 0;
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text-muted);
  border-bottom: 1px solid var(--color-divider);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: var(--text-sm);
}

.mobile-menu a:hover { color: var(--color-primary); }

@media (max-width: 860px) {
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
}

/* =============================
   PAGE BANNER
   ============================= */
.page-banner {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding-block: clamp(var(--space-5), 3vw, var(--space-10));
  position: relative;
  overflow: hidden;
}

.page-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.6;
}

.page-banner__inner {
  position: relative;
  z-index: 1;
}

.page-banner__eyebrow {
  font-size: var(--text-xs);
  font-family: var(--font-body);
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-primary-highlight);
  margin-bottom: var(--space-3);
}

.page-banner__title {
  font-size: var(--text-2xl);
  font-family: var(--font-display);
  font-weight: 600;
  color: #fff;
  letter-spacing: -0.02em;
}

/* =============================
   SECTION HELPERS
   ============================= */
.section {
  padding-block: clamp(var(--space-8), 4vw, var(--space-12));
}

.section--alt {
  background: var(--color-surface);
}

.section__label {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
  font-family: var(--font-body);
}

.section__title {
  font-size: var(--text-xl);
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-4);
  letter-spacing: -0.01em;
}

.section__lead {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 62ch;
  line-height: 1.75;
}

.divider {
  width: 3rem;
  height: 3px;
  background: var(--color-primary);
  border-radius: 2px;
  margin-bottom: var(--space-6);
}

/* =============================
   CARDS
   ============================= */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow var(--transition-interactive), transform var(--transition-interactive);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card__body {
  padding: var(--space-6);
}

/* =============================
   TAGS / BADGES
   ============================= */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 0.2em 0.65em;
  font-size: var(--text-xs);
  font-weight: 600;
  font-family: var(--font-body);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: var(--radius-full);
}

.tag--primary {
  background: var(--color-primary-highlight);
  color: var(--color-primary);
}

.tag--accent {
  background: var(--color-accent-highlight);
  color: var(--color-accent);
}

.tag--gold {
  background: var(--color-gold-light);
  color: var(--color-gold);
}

.tag--muted {
  background: var(--color-surface-offset);
  color: var(--color-text-muted);
}

/* =============================
   BUTTONS
   ============================= */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.6em 1.4em;
  font-size: var(--text-sm);
  font-weight: 600;
  font-family: var(--font-body);
  border-radius: var(--radius-full);
  transition: background var(--transition-interactive), color var(--transition-interactive), box-shadow var(--transition-interactive);
  text-decoration: none;
  letter-spacing: 0.02em;
  cursor: pointer;
  border: none;
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
}
.btn--primary:hover {
  background: var(--color-primary-hover);
  color: #fff;
  box-shadow: 0 4px 16px oklch(from var(--color-primary) l c h / 0.3);
}

.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}
.btn--outline:hover {
  background: var(--color-primary);
  color: #fff;
}

.btn--ghost {
  background: transparent;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}
.btn--ghost:hover {
  background: var(--color-surface-offset);
  color: var(--color-text);
}

/* =============================
   FOOTER
   ============================= */
.site-footer {
  background: var(--color-primary-active);
  color: var(--color-primary-highlight);
  padding-block: clamp(var(--space-12), 6vw, var(--space-20));
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--space-12);
}

.footer-brand__name {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: #fff;
  margin-bottom: var(--space-3);
  letter-spacing: -0.01em;
}

.footer-brand__tagline {
  font-size: var(--text-sm);
  color: var(--color-primary-highlight);
  line-height: 1.6;
  max-width: 32ch;
}

.footer-section__title {
  font-size: var(--text-xs);
  font-family: var(--font-body);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: var(--space-5);
}

.footer-section address {
  font-style: normal;
  font-size: var(--text-sm);
  line-height: 1.8;
  color: var(--color-primary-highlight);
}

.footer-section address a {
  color: var(--color-primary-highlight);
  text-decoration: none;
}
.footer-section address a:hover { color: #fff; }

.footer-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-nav-list a {
  font-size: var(--text-sm);
  color: var(--color-primary-highlight);
  text-decoration: none;
  transition: color var(--transition-interactive);
}
.footer-nav-list a:hover { color: #fff; }

.footer-social {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-5);
  flex-wrap: wrap;
}

.footer-social a {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary-highlight);
  padding: var(--space-2) var(--space-3);
  border: 1px solid oklch(from var(--color-primary-highlight) l c h / 0.35);
  border-radius: var(--radius-full);
  text-decoration: none;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  transition: all var(--transition-interactive);
}

.footer-social a:hover {
  background: oklch(from #fff l c h / 0.12);
  color: #fff;
  border-color: oklch(from #fff l c h / 0.4);
}

.footer-bottom {
  margin-top: var(--space-12);
  padding-top: var(--space-6);
  border-top: 1px solid oklch(from var(--color-primary-highlight) l c h / 0.2);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-bottom__copy {
  font-size: var(--text-xs);
  color: oklch(from var(--color-primary-highlight) l c h / 0.7);
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* =============================
   PROFILE ICON LINKS
   ============================= */
.profile-links {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.profile-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  text-decoration: none;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  transition: all var(--transition-interactive);
}

.profile-link:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background: var(--color-primary-highlight);
}

/* =============================
   PUBLICATION LIST
   ============================= */
.pub-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.pub-item {
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  border-left: 4px solid var(--color-primary);
  transition: box-shadow var(--transition-interactive);
}

.pub-item:hover {
  box-shadow: var(--shadow-md);
}

.pub-year {
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--space-2);
  font-family: var(--font-body);
}

.pub-title {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
  line-height: 1.4;
}

.pub-title a {
  color: inherit;
  text-decoration: none;
}
.pub-title a:hover { color: var(--color-primary); text-decoration: underline; }

.pub-authors {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

.pub-authors strong {
  color: var(--color-text);
  font-weight: 600;
}

.pub-journal {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  font-style: italic;
}

/* =============================
   STUDENT CARDS
   ============================= */
.student-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-6);
}

.student-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 0;
  overflow: hidden;
  transition: box-shadow var(--transition-interactive), transform var(--transition-interactive);
}

.student-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.student-card__degree {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
  font-family: var(--font-body);
}

.student-card__name {
  font-size: var(--text-lg);
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-3);
  line-height: 1.3;
}

.student-card__thesis {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  font-style: italic;
}

.student-card__institution {
  margin-top: var(--space-3);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  font-family: var(--font-body);
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.student-card__status {
  margin-top: var(--space-4);
}

/* =============================
   RESEARCH CARDS
   ============================= */
.research-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-6);
}

.research-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  position: relative;
  transition: box-shadow var(--transition-interactive), transform var(--transition-interactive);
}

.research-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }

.research-card__icon {
  width: 3rem;
  height: 3rem;
  background: var(--color-primary-highlight);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-5);
  color: var(--color-primary);
}

.research-card__title {
  font-size: var(--text-lg);
  font-family: var(--font-display);
  color: var(--color-text);
  margin-bottom: var(--space-3);
  font-weight: 600;
  line-height: 1.3;
}

.research-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

.research-card__region {
  margin-top: var(--space-4);
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-family: var(--font-body);
}

/* =============================
   JOURNAL LIST (SERVICE)
   ============================= */
.journal-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.journal-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--color-text);
  transition: box-shadow var(--transition-interactive);
}

.journal-item:hover { box-shadow: var(--shadow-sm); }

.journal-item__dot {
  flex-shrink: 0;
  width: 0.5rem;
  height: 0.5rem;
  background: var(--color-primary);
  border-radius: 50%;
  margin-top: 0.35em;
}

.journal-item__name a {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
}
.journal-item__name a:hover { color: var(--color-primary); }

.journal-item__since {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-1);
}

/* =============================
   SERVICE ROLE GRID
   ============================= */
.role-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-6);
  margin-top: var(--space-8);
}

.role-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.role-card__role {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
  font-family: var(--font-body);
}

/* =============================
   MEDIA / NEWS
   ============================= */
.news-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.news-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-5);
  padding: var(--space-5) var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: box-shadow var(--transition-interactive), transform var(--transition-interactive);
}

.news-item:hover { box-shadow: var(--shadow-md); transform: translateY(-1px); }

.news-item__date {
  flex-shrink: 0;
  text-align: center;
  min-width: 3.5rem;
}

.news-item__year {
  font-size: var(--text-xl);
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1;
}

.news-item__month {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.news-item__source {
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-2);
  font-family: var(--font-body);
}

.news-item__title a {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.4;
  text-decoration: none;
}
.news-item__title a:hover { color: var(--color-primary); text-decoration: underline; }

/* =============================
   COURSE CARDS
   ============================= */
.course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-5);
}

.course-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  position: relative;
  transition: box-shadow var(--transition-interactive), transform var(--transition-interactive);
}

.course-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }

.course-card__code {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
  font-family: var(--font-body);
}

.course-card__title {
  font-size: var(--text-base);
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.4;
  margin-bottom: var(--space-4);
}

.course-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* =============================
   STAT BARS (SERVICE)
   ============================= */
.stat-block {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.stat-block__number {
  font-size: var(--text-2xl);
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1;
}

.stat-block__label {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  font-family: var(--font-body);
}

/* =============================
   UTILITIES
   ============================= */
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border-width: 0;
}

.text-muted   { color: var(--color-text-muted); }
.text-faint   { color: var(--color-text-faint); }
.text-primary { color: var(--color-primary); }
.text-accent  { color: var(--color-accent); }
.text-center  { text-align: center; }
.flex-center  { display: flex; align-items: center; justify-content: center; }
.gap-3        { gap: var(--space-3); }
.gap-4        { gap: var(--space-4); }
.gap-6        { gap: var(--space-6); }
.mt-4         { margin-top: var(--space-4); }
.mt-6         { margin-top: var(--space-6); }
.mt-8         { margin-top: var(--space-8); }
.mt-12        { margin-top: var(--space-12); }
.mb-2         { margin-bottom: var(--space-2); }
.mb-4         { margin-bottom: var(--space-4); }
.mb-6         { margin-bottom: var(--space-6); }
.mb-8         { margin-bottom: var(--space-8); }

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-10);
  align-items: start;
}

@media (max-width: 700px) {
  .two-col { grid-template-columns: 1fr; }
}

.three-col {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}

@media (max-width: 900px) {
  .three-col { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 560px) {
  .three-col { grid-template-columns: 1fr; }
}

/* ── SECTION HEADING BAR ─────────────────────── */
.section-heading-bar {
  background: #062f35;
  padding: var(--space-5) var(--space-8);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-8);
  display: inline-block;
  width: 100%;
}

.section-heading-bar .section__label {
  color: #c8a84b;
  opacity: 1;
  margin-bottom: var(--space-2);
}

.section-heading-bar .section__title {
  color: #e8e4dc;
  margin-bottom: 0;
}

.section-heading-bar .divider {
  background: var(--color-gold);
  margin-top: var(--space-4);
  margin-bottom: 0;
}

/* ── BIO JOURNAL LINKS ───────────────────────── */
.bio-text a {
  color: var(--color-accent);
  text-decoration: none;
  font-style: italic;
}
.bio-text a:hover {
  color: var(--color-accent-hover);
  text-decoration: underline;
}
.bio-text a em {
  font-style: italic;
}

/* ── NAV DROPDOWNS ────────────────────────────── */
.nav-dropdown {
  position: relative;
}

.nav-dropdown__menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  min-width: 200px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2) 0;
  z-index: 200;
  margin-top: var(--space-1);
}

.nav-dropdown:hover .nav-dropdown__menu {
  display: block;
}

.nav-dropdown__menu a {
  display: block;
  padding: var(--space-2) var(--space-5);
  font-size: var(--text-xs);
  font-family: var(--font-body);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  letter-spacing: 0.02em;
  text-transform: none;
  white-space: nowrap;
  transition: color var(--transition-interactive), background var(--transition-interactive);
}

.nav-dropdown__menu a:hover {
  color: var(--color-primary);
  background: var(--color-surface-offset);
}

/* ── RESEARCH CARD ICON+TITLE INLINE ──────────── */
.research-card__header {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  margin-bottom: var(--space-3);
}

.research-card__header .research-card__icon {
  margin-bottom: 0;
  flex-shrink: 0;
}

.research-card__header .research-card__title {
  margin-bottom: 0;
}

/* ── GUEST LECTURE LOGO GRID ──────────── */
.guest-lecture-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: flex-start;
  gap: var(--space-8);
  padding: var(--space-6) 0 var(--space-12);
}

.guest-lecture-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  width: 160px;
}

.guest-lecture-name {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
  text-align: center;
  line-height: 1.3;
  margin: 0;
}

.guest-lecture-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 160px;
  height: 120px;
  padding: var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: transform var(--transition-interactive), box-shadow var(--transition-interactive), border-color var(--transition-interactive);
}

.guest-lecture-logo:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.12);
  border-color: var(--color-primary);
}

.guest-lecture-logo img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
}

@media (max-width: 600px) {
  .guest-lecture-grid {
    gap: var(--space-4);
  }
  .guest-lecture-logo {
    width: 130px;
    height: 100px;
    padding: var(--space-3);
  }
}

/* ── DARK MODE LINK COLORS ──────────── */
[data-theme="dark"] a {
  color: #67E8F9;
}
[data-theme="dark"] a:hover {
  color: #A5F3FC;
}
[data-theme="dark"] .nav-links a,
[data-theme="dark"] .mobile-menu a {
  color: var(--color-text);
}
[data-theme="dark"] .nav-links a:hover,
[data-theme="dark"] .mobile-menu a:hover {
  color: var(--color-primary);
}