/*!
 * SARL Team Website - Optimized Styles
 * Enhanced with modern CSS features and improved layout
 */

/* --- CSS Variables --- */
:root {
  --primary-color: #0055a3;
  --secondary-color: #00bfa5;
  --accent-color: #ff6e42;
  --dark-color: #1e293b;
  --light-color: #f8fafc;
  --gray-color: #e2e8f0;
  --text-color: #334155;
  --text-light: #64748b;
  --border-radius: 6px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  --container-width: 1200px;
  --section-spacing: 5rem;
  --font-heading: 'Open Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Open Sans', -apple-system, BlinkMacSystemFont, sans-serif;
}

/* --- Base Layout --- */
html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.6;
  color: var(--text-color);
  background: #fff;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  box-sizing: border-box;
}

/* --- Sections --- */
section {
  padding: var(--section-spacing) 0;
}

section h2 {
  font-size: 2.25rem;
  margin-bottom: 2.5rem;
  text-align: center;
  color: var(--dark-color);
  position: relative;
  padding-bottom: 1rem;
}

section h2::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: var(--secondary-color);
  border-radius: 2px;
}

.section-intro {
  text-align: center;
  max-width: 800px;
  margin: -1.5rem auto 3rem;
  font-size: 1.1rem;
  color: var(--text-light);
}

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

/* --- Flexbox Grid System --- */
.flex-column {
  display: flex;
  flex-direction: column;
}

.flex-row {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  gap: 2rem;
  margin-bottom: 2rem;
}

.flex-item {
  flex: 1;
  min-width: 280px;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  margin-top: 0;
  font-weight: 700;
  line-height: 1.2;
  color: var(--dark-color);
}

h1 {
  font-size: 2.75rem;
  margin-bottom: 1.5rem;
}

h2 {
  font-size: 2.25rem;
  margin-bottom: 1rem;
}

h3 {
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
}

p {
  margin: 0 0 1rem;
  max-width: 70ch;
}

.text-large {
  font-size: 1.1rem;
}

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

/* --- Header & Navigation --- */
header {
  background-color: var(--dark-color);
  color: white;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-md);
}

.site-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

.logo a {
  display: flex;
  align-items: center;
}

.logo img {
  height: 50px;
  width: auto;
}

.nav-links {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links li {
  margin: 0 0.5rem;
}

.nav-links a {
  display: block;
  color: white;
  text-decoration: none;
  padding: 0.5rem 1rem;
  font-weight: 500;
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.nav-links a:hover {
  background-color: rgba(255,255,255,0.1);
  text-decoration: none;
}

.nav-links a.active {
  background-color: var(--secondary-color);
  font-weight: 700;
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  width: 30px;
  height: 25px;
  position: relative;
  cursor: pointer;
  padding: 0;
}

.mobile-menu-toggle span {
  display: block;
  position: absolute;
  height: 3px;
  width: 100%;
  background: white;
  border-radius: 3px;
  opacity: 1;
  left: 0;
  transform: rotate(0deg);
  transition: var(--transition);
}

.mobile-menu-toggle span:nth-child(1) {
  top: 0;
}

.mobile-menu-toggle span:nth-child(2) {
  top: 10px;
}

.mobile-menu-toggle span:nth-child(3) {
  top: 20px;
}

/* --- Hero Section --- */
.hero {
  background: linear-gradient(135deg, var(--primary-color), var(--dark-color));
  color: white;
  padding: 5rem 0;
  text-align: center;
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  font-weight: 700;
}

.hero p {
  font-size: 1.2rem;
  max-width: 800px;
  margin: 0 auto 2rem;
  opacity: 0.9;
}

/* Research Section */
.research-highlight {
  margin-bottom: 2rem;
}

.research-card {
  background-color: #fff;
  border-radius: 6px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.research-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 5px 15px rgba(0,0,0,0.15);
}

.research-info h4 {
  color: #2c3e50;
  margin-top: 0;
  margin-bottom: 0.5rem;
  font-size: 1.25rem;
}

.researchers {
  color: #666;
  font-style: italic;
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.research-description {
  margin-bottom: 1rem;
}

.research-description p {
  font-size: 0.95rem;
  line-height: 1.6;
  color: #444;
  margin-bottom: 0.75rem;
}

  .publication-abstract {
  font-size: 0.95rem;
  color: #444;
  line-height: 1.5;
  margin-bottom: 1rem;
  padding-left: 1rem;
  border-left: 3px solid #eaeaea;
  }
  
.research-metrics {
  display: flex;
  flex-wrap: wrap;
  margin-top: 1rem;
  font-size: 0.85rem;
}

.metric {
  display: inline-flex;
  align-items: center;
  margin-right: 1.5rem;
  color: #666;
}

.metric i {
  margin-right: 0.5rem;
  color: #3498db;
}

.map-caption {
  margin-top: 0.75rem;
  text-align: center;
  font-size: 0.9rem;
  color: #555;
}

/* Social Links */
.social-links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.social-link {
  display: inline-flex;
  align-items: center;
  color: #2c3e50;
  text-decoration: none;
  font-size: 1rem;
  transition: color 0.2s ease;
}

.social-link:hover {
  color: #3498db;
}

.social-link i {
  margin-right: 0.5rem;
  font-size: 1.25rem;
}

@media (min-width: 768px) {
  .social-links {
    flex-direction: row;
    gap: 1.5rem;
  }
}

/* Announcements Section */
.announcement {
  background-color: #fff;
  border-radius: 8px;
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  position: relative;
  border-left: 5px solid #3498db;
}

.announcement.featured {
  border-left-color: #e74c3c;
}

.announcement-badge {
  position: absolute;
  top: 0;
  right: 0;
  background-color: #e74c3c;
  color: #fff;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.25rem 1rem;
  border-radius: 0 8px 0 8px;
  text-transform: uppercase;
}

.announcement h3 {
  margin-top: 0;
  color: #2c3e50;
  font-size: 1.6rem;
  margin-bottom: 1rem;
}

.announcement-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
  color: #7f8c8d;
  font-size: 0.95rem;
}

.announcement-meta i {
  margin-right: 0.5rem;
  color: #e74c3c;
}

.announcement-content {
  font-size: 1rem;
  line-height: 1.6;
  color: #34495e;
}

.announcement-highlight {
  font-size: 1.1rem;
  font-weight: 600;
  color: #e74c3c;
  margin-bottom: 1rem;
  padding: 0.75rem;
  background-color: rgba(231, 76, 60, 0.1);
  border-radius: 4px;
  border-left: 4px solid #e74c3c;
}

.announcement-content h4 {
  margin: 1.5rem 0 0.75rem;
  color: #2c3e50;
}

.highlight-list {
  padding-left: 1.25rem;
  margin-bottom: 1.5rem;
}

.highlight-list li {
  margin-bottom: 0.5rem;
  position: relative;
}

.cta-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin: 1.5rem 0;
}

.button {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: 4px;
  font-weight: 600;
  text-decoration: none;
  text-align: center;
  transition: all 0.3s ease;
}

.button.primary {
  background-color: #e74c3c;
  color: #fff;
}

.button.primary:hover {
  background-color: #c0392b;
}

.button.secondary {
  background-color: #ecf0f1;
  color: #2c3e50;
}

.button.secondary:hover {
  background-color: #bdc3c7;
}

.note {
  background-color: #f9f9f9;
  padding: 1rem;
  border-radius: 4px;
  font-size: 0.9rem;
  margin-top: 1rem;
}

.more-announcements {
  margin-top: 3rem;
}

.more-announcements h3 {
  font-size: 1.4rem;
  margin-bottom: 1.25rem;
}

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

.announcement-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  padding: 1rem 0;
  border-bottom: 1px solid #ecf0f1;
}

.announcement-list li:last-child {
  border-bottom: none;
}

.announcement-date {
  min-width: 100px;
  font-size: 0.9rem;
  color: #7f8c8d;
}

.announcement-title {
  flex: 1;
  padding: 0 1rem;
  font-weight: 500;
}

.announcement-link {
  color: #3498db;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
}

.announcement-link:hover {
  text-decoration: underline;
}

@media (max-width: 768px) {
  .announcement-meta {
    flex-direction: column;
    gap: 0.5rem;
  }
  
  .cta-buttons {
    flex-direction: column;
  }
  
  .button {
    width: 100%;
  }
  
  .announcement-list li {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
  
  .announcement-date {
    min-width: auto;
  }
  
  .announcement-title {
    padding: 0;
  }
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
}

/* --- Cards --- */
.card {
  background: white;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: var(--transition);
  height: 100%;
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-5px);
}

.card-body {
  padding: 1.5rem;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-top: 0;
  margin-bottom: 1rem;
  color: var(--dark-color);
}

/* --- Team Section --- */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.team-member {
  background-color: var(--light-color);
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.team-member:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.team-img {
  width: 100%;
  height: 250px;
  overflow: hidden;
}

.team-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

.team-member:hover .team-img img {
  transform: scale(1.05);
}

.team-info {
  padding: 1.5rem;
}

.team-info h3 {
  margin: 0 0 0.5rem;
  font-size: 1.25rem;
  color: var(--dark-color);
}

.team-info p {
  margin: 0 0 1rem;
  font-size: 0.9rem;
  color: var(--text-light);
}

.team-social {
  display: flex;
  gap: 0.75rem;
}

.team-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--gray-color);
  color: var(--text-color);
  transition: var(--transition);
}

.team-social a:hover {
  background-color: var(--primary-color);
  color: white;
}

@media (max-width: 768px) {
  .team-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  }
  
  .team-img {
    height: 200px;
  }
}
.team-lead {
  max-width: 700px;
  margin: 0 auto 3rem;
}

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

.team-header {
  display: flex;
  align-items: center;
  margin-bottom: 1rem;
}

.team-photo {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 1rem;
  border: 3px solid var(--light-color);
}

.team-info {
  text-align: left;
  flex: 1;
  padding-left: 1.5rem;
}

.team-role {
  color: var(--text-light);
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  font-weight: 500;
}

.team-bio {
  margin-top: 1rem;
  color: var(--text-color);
}

.team-email a {
  color: var(--primary-color);
  text-decoration: none;
}

.team-focus {
  color: var(--accent-color);
  font-size: 0.9rem;
  margin-top: 0.5rem;
}

.team-members .team-photo {
  width: 100px;
  height: 100px;
}

/* --- Publications Section --- */
.section-intro {
  font-size: 1.1rem;
  color: #555;
  margin-bottom: 2rem;
  max-width: 800px;
}

.publications-list {
  margin-bottom: 2.5rem;
}

.publication-item {
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  border-radius: var(--border-radius);
  background: white;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

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

.publication-title {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
  color: var(--dark-color);
}

.publication-authors {
  color: var(--text-light);
  margin-bottom: 0.5rem;
  font-style: italic;
}

.publication-venue {
  font-weight: 500;
  margin-bottom: 1rem;
  color: var(--primary-color);
}

.publication-links {
  display: flex;
  gap: 1rem;
}

.publication-link {
  display: inline-block;
  padding: 0.5rem 1rem;
  background-color: var(--light-color);
  color: var(--primary-color);
  border-radius: var(--border-radius);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: var(--transition);
}

.publication-link:hover {
  background-color: var(--primary-color);
  color: white;
  text-decoration: none;
}

/* --- Contact Section --- */
.map-container {
  margin-top: 1.5rem;
  border-radius: var(--border-radius);
  overflow: hidden;
}

/* --- Footer --- */
footer {
  background-color: var(--dark-color);
  color: white;
  padding: 4rem 0 2rem;
}

footer h3 {
  color: white;
  font-size: 1.25rem;
  margin-bottom: 1.5rem;
  position: relative;
  padding-bottom: 0.75rem;
}

footer h3::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 3px;
  background: var(--secondary-color);
}

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

.footer-links li {
  margin-bottom: 0.75rem;
}

.footer-links a {
  color: rgba(255,255,255,0.8);
  text-decoration: none;
  transition: var(--transition);
}

.footer-links a:hover {
  color: white;
  text-decoration: none;
}

.social-links {
  display: flex;
  gap: 1rem;
}

.social-icon {
  color: white;
  text-decoration: none;
  font-weight: 500;
  background: rgba(255,255,255,0.1);
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.social-icon:hover {
  background: rgba(255,255,255,0.2);
  text-decoration: none;
  color: white;
}

.footer-bottom {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255,255,255,0.1);
  text-align: center;
  color: rgba(255,255,255,0.6);
  font-size: 0.9rem;
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  background: var(--primary-color);
  color: white;
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius);
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
  border: none;
  cursor: pointer;
}

.btn:hover {
  background: #0066cc;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  text-decoration: none;
  color: white;
}

.btn-outline {
  background: transparent;
  border: 2px solid white;
  color: white;
}

.btn-outline:hover {
  background: rgba(255,255,255,0.1);
  color: white;
}

/* --- Utilities --- */
.visually-hidden {
  position: absolute !important;
  height: 1px;
  width: 1px;
  overflow: hidden;
  clip: rect(1px, 1px, 1px, 1px);
}

.clearfix::after {
  content: "";
  display: table;
  clear: both;
}

/* --- Animations --- */
.loaded .content {
  animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideInUp {
  from {
    transform: translateY(30px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.animate-in {
  animation: slideInUp 0.5s ease-out forwards;
}

/* --- Responsive Design --- */
@media (max-width: 992px) {
  section {
    padding: 3rem 0;
  }

  .hero {
    padding: 4rem 0;
  }

  h1 {
    font-size: 2.25rem;
  }

  h2 {
    font-size: 1.75rem;
  }

  .team-header {
    flex-direction: column;
    text-align: center;
  }

  .team-info {
    text-align: center;
    padding-left: 0;
  }
}

@media (max-width: 768px) {
  .flex-row {
    flex-direction: column;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero p {
    font-size: 1rem;
  }

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

  .nav-links {
    display: none;
    flex-direction: column;
    width: 100%;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--dark-color);
    padding: 1rem 0;
    box-shadow: var(--shadow-md);
  }

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

  .nav-links li {
    margin: 0;
    width: 100%;
  }

  .nav-links a {
    padding: 0.75rem 1.5rem;
    width: 100%;
    border-radius: 0;
  }

  .hero-buttons {
    flex-direction: column;
    gap: 0.75rem;
    align-items: center;
  }

  .btn {
    width: 80%;
  }

  .publication-links {
    flex-direction: column;
    gap: 0.5rem;
  }

  .publication-link {
    text-align: center;
  }

  footer {
    padding: 3rem 0 1.5rem;
  }
}

@media (max-width: 480px) {
  section {
    padding: 2rem 0;
  }

  .hero {
    padding: 3rem 0;
  }

  h1 {
    font-size: 1.75rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  h3 {
    font-size: 1.25rem;
  }

  .section-intro {
    font-size: 1rem;
  }

  .card-body {
    padding: 1.25rem;
  }

  .team-photo {
    width: 120px;
    height: 120px;
  }

  .team-members .team-photo {
    width: 80px;
    height: 80px;
  }
}

/* --- Print Styles --- */
@media print {
  header, footer, .hero-buttons, .loading-indicator {
    display: none;
  }

  body {
    font-size: 12pt;
    color: black;
  }

  a {
    color: #000;
    text-decoration: none;
  }

  .container {
    width: 100%;
    padding: 0;
    margin: 0;
  }

  section {
    page-break-inside: avoid;
    padding: 1rem 0;
  }

  .card {
    box-shadow: none;
    border: 1px solid #ddd;
  }

  .card:hover {
    transform: none;
    box-shadow: none;
  }
}