/* =============================================
   Prof. Antoine Guitton — antoine-guitton.fr
   Single stylesheet for all pages
   ============================================= */

/* --- Reset & Base --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #ffffff;
  --text: #111111;
  --accent: #1a3a5c;
  --accent-light: #e8eef5;
  --muted: #666666;
  --border: #e0e0e0;
  --placeholder-bg: #e0e0e0;
  --placeholder-text: #999999;
  --nav-height: 64px;
  --max-width: 1100px;
  --section-gap: 80px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

h1, h2, h3, h4 {
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.4rem, 3vw, 2rem); }
h3 { font-size: 1.2rem; }

p { margin-bottom: 1rem; }
p:last-child { margin-bottom: 0; }

ul { list-style: none; }

img { display: block; max-width: 100%; }

/* --- Layout helpers --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: var(--section-gap) 0;
}

/* --- Navbar --- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  height: var(--nav-height);
}

.navbar .container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.nav-brand:hover {
  text-decoration: none;
  color: var(--accent);
}

.nav-links {
  display: flex;
  gap: 32px;
  align-items: center;
}

.nav-links a {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.15s;
  white-space: nowrap;
}

.nav-links a:hover {
  color: var(--text);
  text-decoration: none;
}

.nav-links a.active {
  color: var(--accent);
  border-bottom: 2px solid var(--accent);
  padding-bottom: 2px;
}

/* Hamburger (hidden on desktop) */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.2s;
}

/* --- Hero --- */
.hero {
  padding: 100px 0 80px;
  border-bottom: 1px solid var(--border);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 220px;
  gap: 60px;
  align-items: center;
}

.hero-photo {
  width: 220px;
  height: 220px;
  border-radius: 50%;
  overflow: hidden;
  flex-shrink: 0;
  box-shadow: 0 8px 40px rgba(26,58,92,0.15);
}

.hero-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero h1 {
  color: var(--accent);
  max-width: 800px;
  margin-bottom: 24px;
}

.hero .subtitle {
  font-size: 1.1rem;
  color: var(--muted);
  max-width: 600px;
  margin-bottom: 12px;
  line-height: 1.7;
}

.hero .affiliation {
  font-size: 0.9rem;
  color: var(--muted);
  margin-bottom: 40px;
}

.hero .affiliation strong {
  color: var(--text);
  font-weight: 600;
}

.hero .affiliation a {
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
  transition: border-color 0.15s, color 0.15s;
}

.hero .affiliation a:hover {
  color: var(--accent);
  border-color: var(--accent);
  text-decoration: none;
}

@media (max-width: 700px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .hero-photo {
    width: 160px;
    height: 160px;
    margin: 0 auto;
    order: -1;
  }
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 4px;
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
  cursor: pointer;
  border: 2px solid transparent;
}

.btn-primary {
  background: var(--accent);
  color: #ffffff;
  border-color: var(--accent);
}

.btn-primary:hover {
  background: #12294a;
  border-color: #12294a;
  text-decoration: none;
  color: #ffffff;
}

.btn-outline {
  background: transparent;
  color: var(--accent);
  border-color: var(--accent);
}

.btn-outline:hover {
  background: var(--accent-light);
  text-decoration: none;
}

/* --- Section headings --- */
.section-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.section-title {
  margin-bottom: 48px;
}

.section-title h2 {
  margin-bottom: 8px;
}

.section-title p {
  color: var(--muted);
  font-size: 1rem;
  max-width: 560px;
}

/* --- Research Cards --- */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  transition: box-shadow 0.2s, transform 0.2s;
}

.card:hover {
  box-shadow: 0 8px 32px rgba(0,0,0,0.08);
  transform: translateY(-2px);
}

.card-img {
  aspect-ratio: 4 / 3;
  width: 100%;
}

.card-body {
  padding: 24px;
}

.card-body h3 {
  margin-bottom: 10px;
  color: var(--accent);
}

.card-body p {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.65;
}

/* --- Placeholder images --- */
.img-placeholder {
  background: var(--placeholder-bg);
  color: var(--placeholder-text);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  width: 100%;
  height: 100%;
}

/* --- Footer --- */
footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
}

footer .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-left {
  font-size: 0.85rem;
  color: var(--muted);
}

.footer-links {
  display: flex;
  gap: 20px;
  align-items: center;
  flex-wrap: wrap;
}

.footer-links a {
  font-size: 0.85rem;
  color: var(--muted);
  transition: color 0.15s;
}

.footer-links a:hover {
  color: var(--accent);
  text-decoration: none;
}

/* --- Page hero (inner pages) --- */
.page-hero {
  padding: 72px 0 56px;
  border-bottom: 1px solid var(--border);
}

.page-hero h1 {
  color: var(--accent);
  max-width: 700px;
  margin-bottom: 16px;
}

.page-hero p {
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 600px;
}

/* --- Research page --- */
.research-section {
  padding: 56px 0;
  border-bottom: 1px solid var(--border);
}

.research-section:last-of-type {
  border-bottom: none;
}

.research-section .research-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.research-section .research-grid.reverse {
  direction: rtl;
}

.research-section .research-grid.reverse > * {
  direction: ltr;
}

.research-img {
  aspect-ratio: 4 / 3;
  border-radius: 4px;
  overflow: hidden;
}

.research-content h2 {
  color: var(--accent);
  margin-bottom: 20px;
}

.research-content p {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.75;
}

/* --- Projects list --- */
.projects-section {
  padding: 56px 0;
  background: var(--accent-light);
}

.projects-section .container {
  max-width: var(--max-width);
}

.projects-section h2 {
  color: var(--accent);
  margin-bottom: 8px;
}

.projects-section .intro {
  color: var(--muted);
  margin-bottom: 36px;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.project-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 20px 24px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.project-item .funder-badge {
  flex-shrink: 0;
  background: var(--accent);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 3px;
  margin-top: 2px;
}

.project-item h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
}

.project-item p {
  font-size: 0.85rem;
  color: var(--muted);
  margin: 0;
}

/* --- Publications page --- */
.pub-year-group {
  margin-bottom: 48px;
}

.pub-year-group .year-label {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
  border-bottom: 2px solid var(--accent);
  padding-bottom: 8px;
  margin-bottom: 24px;
}

.pub-entry {
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 16px;
  align-items: start;
}

.pub-entry:last-child {
  border-bottom: none;
}

.pub-number {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--muted);
  padding-top: 2px;
  text-align: right;
}

.pub-entry .authors {
  font-size: 0.88rem;
  color: var(--muted);
  margin-bottom: 4px;
}

.pub-entry .pub-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}

.pub-entry .journal-info {
  font-size: 0.85rem;
  color: var(--muted);
}

.pub-entry .doi-link {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  margin-left: 8px;
  border: 1px solid var(--accent);
  padding: 1px 8px;
  border-radius: 3px;
  transition: background 0.15s;
}

.pub-entry .doi-link:hover {
  background: var(--accent-light);
  text-decoration: none;
}

/* --- About / Conferences entry lists --- */
.pub-year-block {
  margin-bottom: 8px;
}

.pub-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.pub-item {
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}

.pub-item:last-child {
  border-bottom: none;
}

.pub-item .pub-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
}

.pub-item .pub-meta {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 2px;
}

/* --- Team page --- */
.group-photo {
  width: 100%;
  height: 360px;
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 64px;
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 36px;
}

.team-card {
  text-align: center;
}

.team-photo {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  overflow: hidden;
  margin: 0 auto 16px;
  background: var(--placeholder-bg);
}

.team-photo .img-placeholder {
  border-radius: 50%;
  font-size: 0.7rem;
}

.team-card h3 {
  font-size: 1rem;
  margin-bottom: 4px;
}

.team-card .role {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 8px;
}

.team-card .fun-fact {
  font-size: 0.82rem;
  color: var(--muted);
  font-style: italic;
}

.alumni-section {
  border-top: 1px solid var(--border);
  padding-top: 56px;
}

.alumni-section h2 {
  color: var(--accent);
  margin-bottom: 32px;
}

.alumni-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px 40px;
}

.alumni-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}

.alumni-item .info {
  font-size: 0.9rem;
}

.alumni-item .info strong {
  display: block;
}

.alumni-item .info span {
  font-size: 0.8rem;
  color: var(--muted);
}

.alumni-item .linkedin-link {
  font-size: 0.8rem;
  color: var(--accent);
  font-weight: 600;
  flex-shrink: 0;
}

/* --- Teaching page --- */
.teaching-stats {
  display: flex;
  gap: 40px;
  margin-bottom: 56px;
  flex-wrap: wrap;
}

.stat-box {
  text-align: center;
  min-width: 120px;
}

.stat-box .number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 6px;
}

.stat-box .stat-label {
  font-size: 0.8rem;
  color: var(--muted);
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.courses-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.course-card {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 24px;
  transition: box-shadow 0.2s;
  text-decoration: none;
  display: block;
  color: inherit;
}

.course-card:hover {
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
  text-decoration: none;
  transform: translateY(-2px);
  border-color: var(--accent);
}

.course-card .course-code {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
}

.course-card h3 {
  font-size: 1rem;
  margin-bottom: 6px;
}

.course-card .meta {
  font-size: 0.82rem;
  color: var(--muted);
}

.course-card .arrow {
  font-size: 0.8rem;
  color: var(--accent);
  margin-top: 12px;
  font-weight: 600;
}

/* --- Course detail page --- */
.course-hero {
  padding: 64px 0 48px;
  border-bottom: 1px solid var(--border);
}

.course-hero .breadcrumb {
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 16px;
}

.course-hero .breadcrumb a {
  color: var(--muted);
}

.course-hero .breadcrumb a:hover {
  color: var(--accent);
}

.course-hero h1 {
  color: var(--accent);
  margin-bottom: 12px;
}

.course-hero .course-meta {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  margin-top: 16px;
}

.course-hero .course-meta span {
  font-size: 0.82rem;
  color: var(--muted);
  font-weight: 500;
}

.course-hero .course-meta span strong {
  color: var(--text);
}

.materials-section {
  padding: 56px 0;
}

.materials-section h2 {
  color: var(--accent);
  margin-bottom: 32px;
}

.materials-empty {
  border: 2px dashed var(--border);
  border-radius: 6px;
  padding: 48px;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}

.materials-empty p {
  margin: 0;
}

.file-list {
  display: grid;
  gap: 12px;
}

.file-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  border: 1px solid var(--border);
  border-radius: 6px;
  transition: box-shadow 0.15s;
}

.file-item:hover {
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}

.file-icon {
  width: 36px;
  height: 36px;
  background: var(--accent-light);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.04em;
}

.file-info {
  flex: 1;
}

.file-info .file-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 2px;
}

.file-info .file-desc {
  font-size: 0.8rem;
  color: var(--muted);
}

.file-download {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  flex-shrink: 0;
}

/* --- Outreach page --- */
.outreach-feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  padding: 56px 0;
  border-bottom: 1px solid var(--border);
}

.outreach-feature.reverse {
  direction: rtl;
}

.outreach-feature.reverse > * {
  direction: ltr;
}

.outreach-img {
  aspect-ratio: 4 / 3;
  border-radius: 6px;
  overflow: hidden;
}

.outreach-content .tag {
  display: inline-block;
  background: var(--accent-light);
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 3px;
  margin-bottom: 14px;
}

.outreach-content h2 {
  color: var(--accent);
  margin-bottom: 16px;
}

.outreach-content p {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.75;
  margin-bottom: 10px;
}

.outreach-content .detail {
  font-size: 0.85rem;
  color: var(--muted);
  display: flex;
  gap: 8px;
  align-items: center;
  margin-bottom: 6px;
}

.outreach-content .detail::before {
  content: "—";
  color: var(--accent);
  font-weight: 700;
}

.books-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.book-card {
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  transition: box-shadow 0.2s;
}

.book-card:hover {
  box-shadow: 0 6px 24px rgba(0,0,0,0.08);
}

.book-cover {
  aspect-ratio: 3 / 4;
  background: var(--placeholder-bg);
}

.book-info {
  padding: 16px;
}

.book-info h4 {
  font-size: 0.9rem;
  margin-bottom: 4px;
}

.book-info .publisher {
  font-size: 0.8rem;
  color: var(--muted);
}

.interventions-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 40px;
}

.intervention-item {
  background: var(--accent-light);
  border-radius: 6px;
  padding: 24px;
}

.intervention-item .icon {
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.intervention-item h4 {
  font-size: 0.95rem;
  color: var(--accent);
  margin-bottom: 8px;
}

.intervention-item p {
  font-size: 0.85rem;
  color: var(--muted);
}

/* --- Positions page --- */
.positions-intro {
  font-size: 1.05rem;
  color: var(--muted);
  max-width: 640px;
  margin-bottom: 48px;
  line-height: 1.75;
}

.opening-card {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 28px 32px;
  margin-bottom: 20px;
  transition: box-shadow 0.2s;
}

.opening-card:hover {
  box-shadow: 0 4px 20px rgba(0,0,0,0.07);
}

.opening-card .opening-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.opening-card h3 {
  color: var(--accent);
  font-size: 1.05rem;
}

.opening-card .badge {
  flex-shrink: 0;
  background: #e6f4ea;
  color: #1e7e34;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 3px;
}

.opening-card .badge.closed {
  background: #fdecea;
  color: #c0392b;
}

.opening-card p {
  font-size: 0.9rem;
  color: var(--muted);
  margin-bottom: 16px;
  line-height: 1.7;
}

.opening-card .details {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.opening-card .details span {
  font-size: 0.82rem;
  color: var(--muted);
  font-weight: 500;
}

.opening-card .details span strong {
  color: var(--text);
}

.apply-section {
  background: var(--accent-light);
  border-radius: 6px;
  padding: 40px;
  margin-top: 56px;
}

.apply-section h2 {
  color: var(--accent);
  margin-bottom: 20px;
}

.apply-steps {
  counter-reset: steps;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 24px;
}

.apply-step {
  counter-increment: steps;
  padding: 20px;
  background: var(--bg);
  border-radius: 6px;
  border: 1px solid var(--border);
}

.apply-step::before {
  content: counter(steps);
  display: block;
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 10px;
}

.apply-step h4 {
  font-size: 0.9rem;
  margin-bottom: 6px;
}

.apply-step p {
  font-size: 0.82rem;
  color: var(--muted);
}

/* --- Contact page --- */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.contact-info h2 {
  color: var(--accent);
  font-size: 1.3rem;
  margin-bottom: 24px;
}

.contact-row {
  display: flex;
  gap: 14px;
  margin-bottom: 20px;
  align-items: flex-start;
}

.contact-row .label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  min-width: 72px;
  padding-top: 3px;
}

.contact-row .value {
  font-size: 0.9rem;
  color: var(--text);
  line-height: 1.6;
}

.contact-row .value a {
  color: var(--accent);
}

.map-placeholder {
  aspect-ratio: 4 / 3;
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid var(--border);
}

.tchap-note {
  background: var(--accent-light);
  border-left: 3px solid var(--accent);
  border-radius: 0 4px 4px 0;
  padding: 14px 18px;
  margin-top: 28px;
  font-size: 0.88rem;
  color: var(--text);
}

.tchap-note strong {
  color: var(--accent);
}

/* =============================================
   About / CV page
   ============================================= */

.cv-section {
  margin-bottom: 52px;
}

.cv-section-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--accent);
}

.cv-section-header .section-label {
  margin: 0;
  font-size: 0.72rem;
}

.cv-entry {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 0 24px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}

.cv-entry:last-child {
  border-bottom: none;
}

.cv-date {
  font-size: 0.8rem;
  color: var(--muted);
  font-weight: 500;
  padding-top: 2px;
  line-height: 1.5;
}

.cv-title {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text);
  margin-bottom: 3px;
  line-height: 1.4;
}

.cv-place {
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 6px;
}

.cv-details {
  font-size: 0.83rem;
  color: var(--muted);
  line-height: 1.7;
  margin-top: 4px;
}

@media (max-width: 600px) {
  .cv-entry {
    grid-template-columns: 1fr;
    gap: 4px;
  }
  .cv-date {
    font-size: 0.75rem;
    color: var(--accent);
  }
}

/* Announcement banner */
.announcement-banner {
  background: #fff8e1;
  border-left: 4px solid #f59e0b;
  border-radius: 0 4px 4px 0;
  padding: 14px 18px;
  margin-bottom: 28px;
  font-size: 0.88rem;
  color: var(--text);
  line-height: 1.6;
}

.announcement-banner strong {
  color: #b45309;
}

/* =============================================
   Responsive
   ============================================= */
@media (max-width: 900px) {
  .cards-grid {
    grid-template-columns: 1fr 1fr;
  }

  .research-section .research-grid,
  .outreach-feature {
    grid-template-columns: 1fr;
    gap: 32px;
    direction: ltr;
  }

  .research-section .research-grid.reverse > *,
  .outreach-feature.reverse > * {
    direction: ltr;
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }

  .team-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .courses-grid {
    grid-template-columns: 1fr;
  }

  .alumni-list {
    grid-template-columns: 1fr;
  }

  .contact-layout {
    grid-template-columns: 1fr;
  }

  .interventions-list {
    grid-template-columns: 1fr;
  }

  .apply-steps {
    grid-template-columns: 1fr;
  }

  .books-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  :root {
    --section-gap: 56px;
    --nav-height: 56px;
  }

  .hero {
    padding: 56px 0 48px;
  }

  .cards-grid {
    grid-template-columns: 1fr;
  }

  .team-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    gap: 0;
    padding: 8px 0;
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    padding: 12px 24px;
    width: 100%;
    border-bottom: none !important;
  }

  .nav-links a.active {
    border-bottom: none;
    background: var(--accent-light);
    color: var(--accent);
  }

  .nav-toggle {
    display: flex;
  }

  .navbar {
    position: sticky;
  }

  .navbar .container {
    position: relative;
  }

  footer .container {
    flex-direction: column;
    text-align: center;
  }

  .footer-links {
    justify-content: center;
  }

  .teaching-stats {
    justify-content: center;
    gap: 24px;
  }

  .books-grid {
    grid-template-columns: 1fr;
    max-width: 280px;
    margin-left: auto;
    margin-right: auto;
  }

  .apply-section {
    padding: 24px;
  }

  .opening-card {
    padding: 20px;
  }
}