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

:root {
  /* Fixed invalid hex color codes */
  /* Charte graphique ULCO */
  --ulco-bleu: #005795;
  --ulco-bleu-clair: #1588f0;
  --ulco-cyan: #5bc0de;
  --ulco-jaune: #f0ad4e;

  /* Couleurs fonctionnelles */
  --primary: var(--ulco-bleu);
  --primary-hover: #003d6b;
  --secondary: var(--ulco-bleu-clair);
  --accent: var(--ulco-jaune);
  --text: #1a1a1a;
  --text-light: #666;
  --background: #ffffff;
  --background-alt: #f8f9fa;
  --border: #e0e0e0;
  --success: #28a745;
  --error: #dc3545;

  /* Espacements */
  --container-width: 1200px;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 3rem;
  --spacing-xl: 4rem;
}

body {
  font-family: "Montserrat", sans-serif;
  font-weight: 400;
  line-height: 1.6;
  color: var(--text);
  background-color: var(--background);
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

h1 {
  font-size: 2.5rem;
}
h2 {
  font-size: 2rem;
}
h3 {
  font-size: 1.5rem;
}
h4 {
  font-size: 1.25rem;
}

p {
  margin-bottom: 1rem;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--secondary);
}

/* Container */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Header */
.header {
  background: var(--background);
  border-bottom: 2px solid var(--primary);
  padding: var(--spacing-sm) 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
}

.logo img {
  height: 60px;
  width: auto;
}

.header-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
  margin: 0;
  flex: 1;
  text-align: center;
}

/* Navigation */
.nav {
  display: flex;
  align-items: center;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.nav-toggle span {
  width: 25px;
  height: 3px;
  background: var(--primary);
  margin: 3px 0;
  transition: 0.3s;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-md);
  align-items: center;
}

.nav-menu a {
  color: var(--text);
  font-weight: 600;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  transition: all 0.3s ease;
}

.nav-menu a:hover {
  background: var(--background-alt);
  color: var(--primary);
}

.nav-menu .btn-primary {
  background: var(--primary);
  color: white;
}

.nav-menu .btn-primary:hover {
  background: var(--primary-hover);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  font-weight: 600;
  text-align: center;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.3s ease;
  border: none;
  font-size: 1rem;
  font-family: "Montserrat", sans-serif;
}

.btn-primary {
  background: var(--primary);
  color: white;
}

.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0, 87, 149, 0.3);
}

.btn-secondary {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-secondary:hover {
  background: var(--primary);
  color: white;
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: white;
  padding: var(--spacing-xl) 0;
  text-align: center;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.hero-title {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  font-weight: 700;
}

.hero-subtitle {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-sm);
  font-weight: 300;
}

.hero-date {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-md);
  font-weight: 600;
}

.hero-actions {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

.hero-actions .btn-primary {
  background: var(--accent);
  color: var(--text);
}

.hero-actions .btn-primary:hover {
  background: #e09a3e;
}

.hero-actions .btn-secondary {
  border-color: white;
  color: white;
}

.hero-actions .btn-secondary:hover {
  background: white;
  color: var(--primary);
}

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

.section-title {
  text-align: center;
  color: var(--primary);
  margin-bottom: var(--spacing-lg);
  font-size: 2.5rem;
}

/* About Section */
.about {
  background: var(--background-alt);
}

.about-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.about-text h3 {
  color: var(--primary);
  margin-bottom: var(--spacing-sm);
}

/* Topics Grid */
.topics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
}

.topic-card {
  background: white;
  padding: var(--spacing-md);
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  text-align: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.topic-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 4px 16px rgba(0, 87, 149, 0.2);
}

.topic-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-sm);
}

.topic-card h3 {
  color: var(--primary);
  margin-bottom: var(--spacing-sm);
}

/* CTA Section */
.cta {
  background: var(--primary);
  color: white;
  text-align: center;
}

.cta h2 {
  margin-bottom: var(--spacing-sm);
}

.cta p {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-md);
}

/* Contact Preview */
.contact-preview {
  background: var(--background-alt);
}

/* Page Header */
.page-header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: white;
  padding: var(--spacing-lg) 0;
  text-align: center;
}

.page-header h2 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-sm);
}

.page-header p {
  font-size: 1.25rem;
}

/* Forms */
.form-section {
  padding: var(--spacing-xl) 0;
}

.form-container {
  max-width: 800px;
  margin: 0 auto;
  background: white;
  padding: var(--spacing-lg);
  border-radius: 8px;
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.1);
}

.form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
}

.form-group {
  display: flex;
  flex-direction: column;
}

.form-group label {
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.required {
  color: var(--error);
}

.form-group input,
.form-group textarea,
.form-group select {
  padding: 0.75rem;
  border: 2px solid var(--border);
  border-radius: 4px;
  font-family: "Montserrat", sans-serif;
  font-size: 1rem;
  transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
}

.select-wrapper {
  position: relative;
}

.checkbox-group {
  flex-direction: row;
  align-items: flex-start;
}

.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
  margin-top: 0.25rem;
  width: 18px;
  height: 18px;
  cursor: pointer;
}

.form-help {
  font-size: 0.875rem;
  color: var(--text-light);
  margin-top: 0.5rem;
  margin-left: 1.5rem;
}

.form-actions {
  display: flex;
  justify-content: center;
  margin-top: var(--spacing-md);
}

/* Alerts */
.alert {
  padding: var(--spacing-md);
  border-radius: 4px;
  margin-bottom: var(--spacing-md);
}

.alert-success {
  background: #d4edda;
  border: 1px solid #c3e6cb;
  color: #155724;
}

.alert h3 {
  margin-bottom: 0.5rem;
  color: #155724;
}

/* Conference List */
.programme-intro {
  text-align: center;
  max-width: 800px;
  margin: 0 auto var(--spacing-lg);
  font-size: 1.125rem;
}

.conference-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.conference-item {
  background: white;
  padding: var(--spacing-md);
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  display: flex;
  gap: var(--spacing-md);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.conference-item:hover {
  transform: translateX(5px);
  box-shadow: 0 4px 16px rgba(0, 87, 149, 0.2);
}

.conference-icon {
  font-size: 2.5rem;
  flex-shrink: 0;
}

.conference-content h3 {
  color: var(--primary);
  margin-bottom: var(--spacing-sm);
}

.programme-cta {
  text-align: center;
  margin-top: var(--spacing-xl);
  padding: var(--spacing-lg);
  background: var(--background-alt);
  border-radius: 8px;
}

/* Added styles for schedule timeline */
.schedule-timeline {
  max-width: 900px;
  margin: 0 auto;
  position: relative;
}

.schedule-item {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  position: relative;
}

.schedule-item::before {
  content: "";
  position: absolute;
  left: 120px;
  top: 40px;
  bottom: -40px;
  width: 2px;
  background: var(--border);
}

.schedule-item:last-child::before {
  display: none;
}

.schedule-time {
  min-width: 120px;
  text-align: right;
}

.time-badge {
  display: inline-block;
  padding: 0.5rem 1rem;
  background: var(--background-alt);
  border: 2px solid var(--primary);
  border-radius: 20px;
  font-weight: 600;
  color: var(--primary);
  font-size: 0.875rem;
}

.time-badge.primary {
  background: var(--primary);
  color: white;
}

.schedule-content {
  flex: 1;
  background: white;
  padding: var(--spacing-md);
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.schedule-item.highlight .schedule-content {
  border: 2px solid var(--primary);
}

.schedule-content h3 {
  color: var(--primary);
  margin-bottom: 0.5rem;
  font-size: 1.25rem;
}

.conference-details {
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.conference-note {
  font-style: italic;
  color: var(--text-light);
  font-size: 0.875rem;
}

/* Contact Page */
.contact-section {
  padding: var(--spacing-xl) 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.contact-info {
  background: var(--background-alt);
  padding: var(--spacing-lg);
  border-radius: 8px;
}

.contact-item {
  margin-bottom: var(--spacing-md);
}

.contact-item h4 {
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.contact-form-wrapper {
  background: white;
  padding: var(--spacing-lg);
  border-radius: 8px;
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.1);
}

/* Accès Page */
.acces-section {
  padding: var(--spacing-xl) 0;
}

.acces-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

.acces-card {
  background: white;
  padding: var(--spacing-md);
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.acces-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-sm);
}

.acces-card h3 {
  color: var(--primary);
  margin-bottom: var(--spacing-md);
}

.acces-card ul {
  margin-left: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
}

.parking-section,
.practical-info {
  margin-top: var(--spacing-xl);
}

.parking-section h2,
.practical-info h2 {
  color: var(--primary);
  margin-bottom: var(--spacing-md);
}

.parking-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.parking-item {
  background: var(--background-alt);
  padding: var(--spacing-md);
  border-radius: 8px;
}

.parking-item h4 {
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.map-placeholder {
  background: var(--background-alt);
  padding: var(--spacing-lg);
  border-radius: 8px;
  text-align: center;
  border: 2px dashed var(--border);
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
}

.info-item {
  background: var(--background-alt);
  padding: var(--spacing-md);
  border-radius: 8px;
}

.info-item h4 {
  color: var(--primary);
  margin-bottom: 0.5rem;
}

/* Added styles for themes section */
.themes-section {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-xl);
  border-top: 2px solid var(--border);
}

.section-subtitle {
  text-align: center;
  color: var(--primary);
  margin-bottom: var(--spacing-md);
  font-size: 2rem;
}

.themes-intro {
  text-align: center;
  max-width: 800px;
  margin: 0 auto var(--spacing-lg);
  font-size: 1.125rem;
}

.themes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-md);
}

.theme-card {
  background: white;
  padding: var(--spacing-md);
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  position: relative;
  padding-left: 4rem;
}

.theme-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 4px 16px rgba(0, 87, 149, 0.2);
}

.theme-number {
  position: absolute;
  left: var(--spacing-md);
  top: var(--spacing-md);
  width: 40px;
  height: 40px;
  background: var(--primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.125rem;
}

.theme-card h4 {
  color: var(--primary);
  margin-bottom: 0.5rem;
  font-size: 1rem;
}

.theme-card p {
  font-size: 0.875rem;
  color: var(--text-light);
  margin: 0;
}

/* Added styles for team page */
.team-section {
  padding: var(--spacing-xl) 0;
}

.team-intro {
  text-align: center;
  max-width: 800px;
  margin: 0 auto var(--spacing-xl);
  font-size: 1.125rem;
}

.team-category-title {
  text-align: center;
  color: var(--primary);
  margin: var(--spacing-xl) 0 var(--spacing-md);
  font-size: 1.75rem;
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

.team-member {
  background: white;
  padding: var(--spacing-md);
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  text-align: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.team-member:hover {
  transform: translateY(-5px);
  box-shadow: 0 4px 16px rgba(0, 87, 149, 0.2);
}

.member-avatar {
  font-size: 4rem;
  margin-bottom: var(--spacing-sm);
}

.team-member h4 {
  color: var(--primary);
  margin-bottom: 0.5rem;
  font-size: 1.125rem;
}

.member-name {
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.member-role {
  color: var(--text-light);
  font-size: 0.875rem;
  margin: 0;
}

.team-mission {
  margin-top: var(--spacing-xl);
  padding: var(--spacing-lg);
  background: var(--background-alt);
  border-radius: 8px;
}

.team-mission h3 {
  text-align: center;
  color: var(--primary);
  margin-bottom: var(--spacing-lg);
  font-size: 2rem;
}

.mission-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
}

.mission-item {
  background: white;
  padding: var(--spacing-md);
  border-radius: 8px;
  text-align: center;
}

.mission-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-sm);
}

.mission-item h4 {
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.mission-item p {
  font-size: 0.875rem;
  margin: 0;
}

.team-join {
  text-align: center;
  margin-top: var(--spacing-xl);
  padding: var(--spacing-lg);
  background: white;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.team-join h3 {
  color: var(--primary);
  margin-bottom: var(--spacing-sm);
}

.team-join p {
  margin-bottom: var(--spacing-md);
  font-size: 1.125rem;
}

/* Footer */
.footer {
  background: var(--primary);
  color: white;
  padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.footer-section h4 {
  margin-bottom: var(--spacing-sm);
  font-weight: 700;
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: 0.5rem;
}

.footer-section a {
  color: white;
}

.footer-section a:hover {
  color: var(--accent);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

/* Added CV page styles */
.cv-section {
  padding: var(--spacing-xl) 0;
}

.cv-intro {
  text-align: center;
  max-width: 800px;
  margin: 0 auto var(--spacing-xl);
  font-size: 1.125rem;
}

.cv-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.cv-card {
  background: white;
  border-radius: 8px;
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.1);
  overflow: hidden;
}

.cv-header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: white;
  padding: var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.cv-photo-placeholder {
  width: 80px;
  height: 80px;
  background: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  flex-shrink: 0;
}

.cv-identity h3 {
  font-size: 1.5rem;
  margin-bottom: 0.25rem;
}

.cv-title {
  font-size: 1rem;
  opacity: 0.9;
  margin: 0;
}

.cv-content {
  padding: var(--spacing-lg);
}

.cv-section-item {
  margin-bottom: var(--spacing-lg);
}

.cv-section-item:last-child {
  margin-bottom: 0;
}

.cv-section-item h4 {
  color: var(--primary);
  font-size: 1.125rem;
  margin-bottom: var(--spacing-sm);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.cv-section-item ul {
  list-style: none;
  padding-left: 0;
}

.cv-section-item ul li {
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
}

.cv-section-item ul li:last-child {
  border-bottom: none;
}

.cv-section-item strong {
  color: var(--primary);
}

.cv-note {
  text-align: center;
  background: var(--background-alt);
  padding: var(--spacing-lg);
  border-radius: 8px;
  margin-top: var(--spacing-xl);
}

.cv-note p {
  margin: 0;
  font-style: italic;
  color: var(--text-light);
}

/* Added sponsors page styles */
.sponsors-section {
  padding: var(--spacing-xl) 0;
}

.sponsors-intro {
  text-align: center;
  max-width: 800px;
  margin: 0 auto var(--spacing-xl);
  font-size: 1.125rem;
}

.sponsors-category {
  margin-bottom: var(--spacing-xl);
}

.sponsors-category-title {
  text-align: center;
  color: var(--primary);
  font-size: 2rem;
  margin-bottom: var(--spacing-lg);
}

.sponsors-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.sponsors-grid-horizontal {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.sponsor-card {
  background: white;
  padding: var(--spacing-lg);
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  text-align: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.sponsor-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 4px 16px rgba(0, 87, 149, 0.2);
}

/* Removed main-sponsor special styling to keep all 3 cards equal */

.sponsor-logo {
  margin-bottom: var(--spacing-md);
}

/* Added smaller logo size for all partners */
.logo-placeholder {
  width: 120px;
  height: 120px;
  margin: 0 auto;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  color: white;
}

.logo-placeholder.logo-small {
  width: 80px;
  height: 80px;
  font-size: 1rem;
}

.sponsor-card h4 {
  color: var(--primary);
  margin-bottom: var(--spacing-sm);
  font-size: 1.25rem;
}

.sponsor-card p {
  color: var(--text-light);
  font-size: 0.875rem;
  line-height: 1.6;
}

.become-partner {
  margin-top: var(--spacing-xl);
}