/* ==========================================================================
   LECTURES SANS FRONTIERES - PORTAIL INSTITUTIONNEL (LOI 1901)
   Feuille de style principale - Norme d'accessibilité & Performance
   ========================================================================== */

:root {
  --color-primary: #002366;       /* Royal Blue */
  --color-primary-dark: #001744;  /* Deep Navy */
  --color-primary-light: #0d388f; /* Lighter Royal */
  --color-accent: #FFD700;        /* Deep Gold */
  --color-accent-dark: #cca400;   /* Muted Gold */
  --color-accent-hover: #ffdf33;  /* Bright Gold */
  --color-text-dark: #1A202C;     /* Charcoal Black */
  --color-text-muted: #4A5568;    /* Slate Gray */
  --color-bg-light: #F8FAFC;      /* Crisp Off-White */
  --color-bg-surface: #FFFFFF;    /* Pure White */
  --color-border: #E2E8F0;        /* Light Border */
  --color-border-focus: #002366;
  --color-footer-bg: #1A202C;     /* Institutional Dark Footer */
  --color-footer-text: #E2E8F0;
  --font-family-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-family-display: Georgia, Cambria, "Times New Roman", Times, serif;
  --max-width: 1240px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 35, 102, 0.08);
  --shadow-lg: 0 10px 25px rgba(0, 35, 102, 0.12);
}

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

html {
  font-size: 16px;
  line-height: 1.6;
  scroll-behavior: smooth;
  color: var(--color-text-dark);
  background-color: var(--color-bg-light);
  font-family: var(--font-family-base);
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

a:hover, a:focus {
  color: var(--color-primary-light);
}

p {
  margin-bottom: 1.15rem;
  line-height: 1.7;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--color-primary);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 0.85rem;
}

h1 {
  font-size: 2.25rem;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 1.75rem;
  border-bottom: 2px solid var(--color-accent);
  padding-bottom: 0.5rem;
  margin-top: 1.5rem;
}

h3 {
  font-size: 1.3rem;
  margin-top: 1.2rem;
}

ul, ol {
  padding-left: 1.5rem;
  margin-bottom: 1.25rem;
}

li {
  margin-bottom: 0.35rem;
}

/* --------------------------------------------------------------------------
   LAYOUT UTILITIES
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

.site-main {
  flex: 1 0 auto;
  padding: 40px 0;
}

/* Two-column compliance grid: 3fr 1fr */
.institutional-grid {
  display: grid;
  grid-template-columns: 3fr 1fr;
  gap: 36px;
  align-items: start;
}

.main-column {
  background: var(--color-bg-surface);
  padding: 36px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.side-rail {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.side-card {
  background: var(--color-bg-surface);
  padding: 24px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.side-card.highlight {
  border-top: 4px solid var(--color-accent);
  background: linear-gradient(180deg, #FFFDF0 0%, #FFFFFF 100%);
}

.side-card.primary-rail {
  border-top: 4px solid var(--color-primary);
}

.stat-item {
  display: flex;
  flex-direction: column;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
}

.stat-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.stat-number {
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.1;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

/* --------------------------------------------------------------------------
   HEADER & MEGA MENU SYSTEM
   -------------------------------------------------------------------------- */
.site-header {
  width: 100%;
  background: var(--color-bg-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-sm);
}

/* Row 1: Top Utility Strip */
.top-utility-strip {
  background: #F4F6F9;
  color: #333333;
  height: 42px;
  padding: 0 20px;
  font-size: 0.8125rem;
  border-bottom: 1px solid #E2E8F0;
}

.top-utility-inner {
  max-width: var(--max-width);
  height: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.top-utility-left {
  display: flex;
  align-items: center;
  gap: 16px;
  font-weight: 600;
}

.top-badge-rna {
  display: inline-flex;
  align-items: center;
  background: #E2E8F0;
  color: #002366;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  letter-spacing: 0.03em;
}

.top-utility-right {
  display: flex;
  align-items: center;
  gap: 20px;
}

.search-box-sim {
  display: flex;
  align-items: center;
  background: #FFFFFF;
  border: 1px solid #CBD5E0;
  border-radius: var(--radius-sm);
  padding: 2px 8px;
  height: 28px;
}

.search-box-sim input {
  border: none;
  background: transparent;
  font-size: 0.75rem;
  outline: none;
  width: 160px;
  color: #333333;
}

.search-box-sim span {
  color: #718096;
  font-size: 0.75rem;
}

.lang-selector {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
}

.lang-item {
  color: #4A5568;
  padding: 2px 4px;
}

.lang-item.active {
  color: var(--color-primary);
  border-bottom: 2px solid var(--color-primary);
}

/* Row 2: Main Navigation Bar */
.main-nav-bar {
  background: #FFFFFF;
  padding: 12px 20px;
}

.main-nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand-block {
  display: flex;
  flex-direction: column;
  min-width: 260px;
}

.brand-title {
  font-size: 1.35rem;
  font-weight: 900;
  color: var(--color-primary);
  letter-spacing: -0.01em;
  line-height: 1.15;
  text-transform: uppercase;
}

.brand-subtitle {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  font-weight: 600;
  letter-spacing: 0.02em;
}

/* Navigation Menu */
.nav-menu-wrapper {
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav-list {
  display: flex;
  list-style: none;
  gap: 6px;
  margin: 0;
  padding: 0;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  font-weight: 700;
  font-size: 0.9375rem;
  color: var(--color-primary);
  border-radius: var(--radius-sm);
  min-height: 44px; /* Accessible touch target */
  line-height: 1;
}

.nav-link:hover, .nav-item:hover > .nav-link {
  background: #F0F4FA;
  color: var(--color-primary);
}

/* Mega Menu Dropdown */
.mega-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 320px;
  background: #FFFFFF;
  border: 1px solid var(--color-border);
  border-top: 3px solid var(--color-primary);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 12px;
  display: none;
  z-index: 100;
  list-style: none;
}

.nav-item:hover .mega-dropdown,
.nav-item:focus-within .mega-dropdown {
  display: block;
}

.mega-dropdown li {
  margin: 0;
}

.dropdown-link {
  display: block;
  padding: 10px 14px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-dark);
  border-radius: var(--radius-sm);
  border-bottom: 1px solid #F1F5F9;
  min-height: 44px;
  display: flex;
  align-items: center;
}

.dropdown-link:hover, .dropdown-link:focus {
  background: #F8FAFC;
  color: var(--color-primary);
  padding-left: 18px;
}

/* Header Contact Button */
.header-cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent);
  color: #001744;
  font-weight: 800;
  font-size: 0.875rem;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  border: 1px solid #CCA400;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  min-height: 44px;
  min-width: 140px;
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  white-space: nowrap;
}

.header-cta-btn:hover {
  background: var(--color-accent-hover);
  color: #000000;
}

/* Mobile Toggle Hamburger */
.mobile-nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--color-primary);
  cursor: pointer;
  min-height: 44px;
  min-width: 44px;
}

/* --------------------------------------------------------------------------
   HERO BANNER & MANDATORY NON-PROFIT STATEMENTS
   -------------------------------------------------------------------------- */
.hero-section {
  background: linear-gradient(180deg, #FFFFFF 0%, #F1F5FB 100%);
  border-bottom: 1px solid var(--color-border);
  padding: 48px 0;
  margin-bottom: 40px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 36px;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
}

.hero-category-tag {
  display: inline-block;
  align-self: flex-start;
  background: #E7EFFC;
  color: var(--color-primary);
  font-size: 0.8125rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-left: 3px solid var(--color-primary);
}

.hero-title {
  font-size: 2.5rem;
  line-height: 1.15;
  color: var(--color-primary);
  margin-bottom: 16px;
}

/* Mandatory 2-sentence non-profit statement right below the main hero headline */
.hero-nonprofit-statement {
  background: #FFFBEB;
  border-left: 4px solid var(--color-accent);
  padding: 16px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 20px;
  color: #451A03;
  font-size: 1.05rem;
  font-weight: 500;
  line-height: 1.6;
}

.hero-funding-notice {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin-bottom: 24px;
  line-height: 1.6;
  border-bottom: 1px dashed var(--color-border);
  padding-bottom: 16px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-image-wrapper {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
}

.hero-image-wrapper img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

/* --------------------------------------------------------------------------
   NON-COMMERCIAL ENGAGEMENT BUTTONS (CTAs)
   -------------------------------------------------------------------------- */
.btn-engagement {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 0.9375rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  min-height: 44px; /* Accessible touch target */
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-primary);
  color: #FFFFFF;
  border: 1px solid var(--color-primary-dark);
}

.btn-primary:hover, .btn-primary:focus {
  background: var(--color-primary-dark);
  color: #FFFFFF;
}

.btn-accent {
  background: var(--color-accent);
  color: #001744;
  border: 1px solid #CCA400;
}

.btn-accent:hover, .btn-accent:focus {
  background: var(--color-accent-hover);
  color: #000000;
}

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

.btn-outline:hover, .btn-outline:focus {
  background: #F0F4FA;
  color: var(--color-primary-dark);
}

/* --------------------------------------------------------------------------
   PROGRAM CATALOG & CARDS GRID
   -------------------------------------------------------------------------- */
.programs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin: 28px 0;
}

.program-card {
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.program-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.program-card-img {
  position: relative;
  aspect-ratio: 16 / 9;
  background: #E2E8F0;
  overflow: hidden;
}

.program-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.program-badge-status {
  position: absolute;
  top: 12px;
  left: 12px;
  background: #002366;
  color: #FFFFFF;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  letter-spacing: 0.03em;
  border: 1px solid #FFD700;
}

.program-card-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  flex: 1 1 auto;
}

.program-card-body h3 {
  margin-top: 0;
  margin-bottom: 10px;
  font-size: 1.15rem;
  color: var(--color-primary);
}

.program-card-body p {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  flex-grow: 1;
}

.program-card-footer {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid #F1F5F9;
}

/* --------------------------------------------------------------------------
   CALLOUT BOXES & HIGHLIGHTS
   -------------------------------------------------------------------------- */
.callout-box {
  background: #F8FAFC;
  border-left: 4px solid var(--color-primary);
  padding: 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 24px 0;
}

.callout-box.gold {
  border-left-color: var(--color-accent);
  background: #FFFDF0;
}

.reinvestment-banner {
  background: #EFF6FF;
  border: 1px solid #BFDBFE;
  padding: 16px 20px;
  border-radius: var(--radius-md);
  margin: 24px 0;
  font-weight: 600;
  color: #1E3A8A;
}

/* --------------------------------------------------------------------------
   FINANCIAL & DATA TABLES
   -------------------------------------------------------------------------- */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  margin: 24px 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9375rem;
}

.data-table th {
  background: #F1F5FB;
  color: var(--color-primary);
  font-weight: 700;
  padding: 14px 16px;
  border-bottom: 2px solid var(--color-border);
}

.data-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-dark);
}

.data-table tr:nth-child(even) td {
  background: #F8FAFC;
}

.data-table tr:last-child td {
  border-bottom: none;
}

.data-table td.amount {
  font-weight: 700;
  text-align: right;
}

.data-table th.amount {
  text-align: right;
}

/* --------------------------------------------------------------------------
   FORMS & ENGAGEMENT INPUTS
   -------------------------------------------------------------------------- */
.engagement-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin: 24px 0;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--color-text-dark);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid #CBD5E0;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 1rem;
  background: #FFFFFF;
  color: var(--color-text-dark);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  min-height: 44px;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 35, 102, 0.15);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

/* --------------------------------------------------------------------------
   ACCORDION & FAQ SYSTEM
   -------------------------------------------------------------------------- */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 24px 0;
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: #FFFFFF;
  overflow: hidden;
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: 16px 20px;
  background: #F8FAFC;
  border: none;
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 44px;
}

.faq-question:hover {
  background: #F1F5FB;
}

.faq-answer {
  padding: 20px;
  border-top: 1px solid var(--color-border);
  background: #FFFFFF;
  color: var(--color-text-dark);
}

/* --------------------------------------------------------------------------
   FOOTER ARCHITECTURE (4-COLUMN COMPLIANCE)
   -------------------------------------------------------------------------- */
.site-footer {
  background-color: var(--color-footer-bg);
  color: var(--color-footer-text);
  padding: 56px 0 32px 0;
  border-top: 4px solid var(--color-accent);
  margin-top: 60px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 36px;
  margin-bottom: 48px;
}

.footer-col h4 {
  color: #FFFFFF;
  font-size: 1.1rem;
  margin-bottom: 18px;
  border-bottom: 2px solid var(--color-accent);
  padding-bottom: 8px;
  display: inline-block;
}

.footer-col p {
  color: #CBD5E0;
  font-size: 0.9375rem;
  line-height: 1.6;
}

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

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: #E2E8F0;
  font-size: 0.9375rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 0;
  min-height: 36px;
}

.footer-links a:hover, .footer-links a:focus {
  color: var(--color-accent);
  text-decoration: underline;
}

.footer-identity-box {
  background: #2D3748;
  padding: 16px;
  border-radius: var(--radius-sm);
  margin-top: 16px;
  border-left: 3px solid var(--color-accent);
  font-size: 0.8125rem;
  color: #E2E8F0;
}

.footer-identity-box strong {
  color: #FFFFFF;
}

/* Base Legal Statement Block */
.footer-bottom-legal {
  border-top: 1px solid #4A5568;
  padding-top: 28px;
  text-align: justify;
  font-size: 0.8125rem;
  line-height: 1.7;
  color: #A0AEC0;
}

.footer-bottom-legal a {
  color: var(--color-accent);
}

/* --------------------------------------------------------------------------
   RESPONSIVE BREAKPOINTS: @media (max-width: 992px)
   -------------------------------------------------------------------------- */
@media (max-width: 992px) {
  .institutional-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .main-column {
    padding: 24px;
  }
}

/* --------------------------------------------------------------------------
   RESPONSIVE BREAKPOINTS: @media (max-width: 768px)
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
  h1 {
    font-size: 1.85rem;
  }

  h2 {
    font-size: 1.45rem;
  }

  .top-utility-strip {
    height: auto;
    padding: 8px 16px;
  }

  .top-utility-inner {
    flex-direction: column;
    gap: 6px;
    align-items: flex-start;
  }

  .top-utility-right {
    width: 100%;
    justify-content: space-between;
  }

  .search-box-sim input {
    width: 120px;
  }

  .main-nav-inner {
    flex-wrap: wrap;
  }

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

  .nav-menu-wrapper {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    padding-top: 16px;
  }

  .nav-menu-wrapper.is-open {
    display: flex;
  }

  .nav-list {
    flex-direction: column;
    width: 100%;
    gap: 4px;
  }

  .mega-dropdown {
    position: static;
    display: block;
    box-shadow: none;
    border-left: 2px solid var(--color-accent);
    border-top: none;
    padding-left: 12px;
    margin-bottom: 8px;
    background: #F8FAFC;
  }

  .header-cta-btn {
    width: 100%;
    text-align: center;
    margin-top: 10px;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

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

  .hero-actions {
    flex-direction: column;
  }

  .btn-engagement {
    width: 100%;
  }
}