/*
  Analyse Spatiale – Industrie et Gouvernance
  Stylesheet
*/

/* ------------------- */
/*   CSS Variables     */
/* ------------------- */
:root {
  --color-primary: #0a2342; /* Deep Navy Blue */
  --color-secondary: #2c5d92; /* Muted Blue */
  --color-accent: #5b8ad2; /* Soft Institutional Blue */
  --color-background-light: #f4f6f8; /* Light Neutral Grey */
  --color-text-dark: #212529; /* Dark Neutral Grey */
  --color-text-light: #ffffff;
  --color-border: #dee2e6;
  --color-overlay: rgba(10, 35, 66, 0.75);

  --font-family-base: 'Lato', 'Open Sans', 'Roboto', sans-serif;
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-bold: 700;

  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-xxl: 48px;
  --spacing-xxxl: 64px;
  --spacing-section: clamp(4rem, 8vw, 7.5rem);

  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 16px;

  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 5px 15px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.1);

  --transition-fast: 200ms ease-in-out;
  --transition-med: 300ms ease-in-out;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-family-base);
  font-weight: var(--font-weight-normal);
  line-height: 1.7;
  color: var(--color-text-dark);
  background-color: var(--color-background-light);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-base);
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: 1.25rem; }

p {
  margin-bottom: var(--spacing-md);
  max-width: 75ch;
}

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

a:hover, a:focus {
  color: var(--color-secondary);
  text-decoration: underline;
}

ul, ol {
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  filter: grayscale(1) brightness(0.95);
  transition: filter var(--transition-med);
}

.card:hover img {
    filter: grayscale(0) brightness(1);
}

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
}

.section {
  padding: var(--spacing-section) 0;
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-xxl);
}

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

/* ------------------- */
/*      Header         */
/* ------------------- */
.main-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  background-color: var(--color-text-light);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
  padding: var(--spacing-md) 0;
  transition: all var(--transition-med);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  text-decoration: none;
}

.logo:hover {
  text-decoration: none;
  color: var(--color-secondary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
}

.nav-links a {
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  text-decoration: none;
  padding: var(--spacing-sm) 0;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-accent);
  transition: width var(--transition-med);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

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

.dropdown {
  position: relative;
}

.dropdown-content {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background-color: var(--color-text-light);
  box-shadow: var(--shadow-md);
  min-width: 250px;
  border-radius: var(--border-radius-sm);
  padding: var(--spacing-sm) 0;
  z-index: 1001;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity var(--transition-med), transform var(--transition-med);
}

.dropdown:hover .dropdown-content {
  display: block;
  opacity: 1;
  transform: translateY(0);
}

.dropdown-content a {
  display: block;
  padding: var(--spacing-sm) var(--spacing-lg);
  color: var(--color-primary);
  white-space: nowrap;
}

.dropdown-content a:hover {
  background-color: var(--color-background-light);
  text-decoration: none;
}

.dropdown-content a::after {
  display: none;
}

.hamburger {
  display: none;
  cursor: pointer;
  background: none;
  border: none;
}

.hamburger .bar {
  display: block;
  width: 25px;
  height: 3px;
  margin: 5px auto;
  transition: all 0.3s ease-in-out;
  background-color: var(--color-primary);
}

/* ------------------- */
/*    Hero Section     */
/* ------------------- */
.hero {
  position: relative;
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-light);
  text-align: center;
  padding: var(--spacing-xxxl) 0;
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--color-overlay);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 900px;
}

.hero h1 {
  color: var(--color-text-light);
  margin-bottom: var(--spacing-lg);
}

.hero p {
  font-size: 1.25rem;
  font-weight: var(--font-weight-light);
  max-width: 70ch;
  margin: 0 auto;
  opacity: 0.9;
}

.hero.hero-small {
    min-height: 40vh;
}
.hero.hero-small p {
    display: none;
}

/* ------------------- */
/*   Content Sections  */
/* ------------------- */
.section-light { background-color: var(--color-text-light); }
.section-grey { background-color: var(--color-background-light); }

.grid {
  display: grid;
  gap: var(--spacing-xl);
}

.grid-3 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(400px, 1fr)); align-items: center;}

.card {
  background-color: var(--color-text-light);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform var(--transition-med), box-shadow var(--transition-med);
  display: flex;
  flex-direction: column;
  height: 100%;
}

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

.card-img {
    width: 100%;
    height: 220px;
    object-fit: cover;
}

.card-body {
  padding: var(--spacing-xl);
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

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

.card-text {
  flex-grow: 1;
  margin-bottom: var(--spacing-lg);
}

.card-link {
  font-weight: var(--font-weight-bold);
  display: inline-block;
  align-self: flex-start;
}

.content-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
    align-items: center;
}

.content-block-img {
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    width: 100%;
    height: 100%;
    max-height: 500px;
    object-fit: cover;
}

.content-block-img.right {
    grid-column: 2;
    grid-row: 1;
}

/* ------------------- */
/*    Article Page     */
/* ------------------- */
.article-content {
    background-color: #fff;
    padding: var(--spacing-xxl);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-sm);
}

.article-content h2, .article-content h3 {
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
}

.article-content ul {
    list-style: disc;
    padding-left: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.article-content li {
    margin-bottom: var(--spacing-sm);
}

.breadcrumbs {
    padding: var(--spacing-md) 0;
    font-size: 0.9rem;
    color: var(--color-text-dark);
}

.breadcrumbs a {
    color: var(--color-secondary);
}

.related-articles {
    margin-top: var(--spacing-xxxl);
}

/* ------------------- */
/*    Contact Form     */
/* ------------------- */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xxxl);
}

.contact-form .form-group {
  margin-bottom: var(--spacing-lg);
}

.contact-form label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: var(--font-weight-bold);
}

.contact-form .form-control {
  width: 100%;
  padding: var(--spacing-md);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  font-family: var(--font-family-base);
  font-size: 1rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.contact-form .form-control:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(91, 138, 210, 0.25);
}

.btn {
  display: inline-block;
  padding: var(--spacing-md) var(--spacing-xl);
  font-family: var(--font-family-base);
  font-size: 1rem;
  font-weight: var(--font-weight-bold);
  text-align: center;
  cursor: pointer;
  border: 2px solid transparent;
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-med);
  text-decoration: none;
}

.btn-primary {
  background-color: var(--color-accent);
  color: var(--color-text-light);
  border-color: var(--color-accent);
}

.btn-primary:hover, .btn-primary:focus {
  background-color: var(--color-secondary);
  border-color: var(--color-secondary);
  color: var(--color-text-light);
  text-decoration: none;
}

.contact-disclaimer {
    font-style: italic;
    font-size: 0.9rem;
    margin-top: var(--spacing-lg);
    background-color: var(--color-background-light);
    padding: var(--spacing-md);
    border-left: 4px solid var(--color-accent);
    border-radius: var(--border-radius-sm);
}

/* ------------------- */
/*   Legal Page     */
/* ------------------- */
.legal-content h2 { margin-top: var(--spacing-xl); }
.legal-content h3 { margin-top: var(--spacing-lg); font-size: 1.2rem; }
.legal-content ul { list-style-type: disc; margin-left: var(--spacing-lg); }

/* ------------------- */
/*       Footer        */
/* ------------------- */
.main-footer {
  background-color: var(--color-primary);
  color: rgba(255, 255, 255, 0.7);
  padding: var(--spacing-xxxl) 0;
  font-size: 0.9rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--spacing-xl);
}

.footer-col h4 {
  color: var(--color-text-light);
  margin-bottom: var(--spacing-lg);
  font-size: 1.1rem;
}

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

.footer-col li {
  margin-bottom: var(--spacing-sm);
}

.footer-col a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
}

.footer-col a:hover {
  color: var(--color-text-light);
  text-decoration: underline;
}

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

/* ------------------- */
/*   Cookie-Banner     */
/* ------------------- */
#cookie-banner {
  display: none;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: rgba(33, 37, 41, 0.95);
  color: var(--color-text-light);
  padding: var(--spacing-lg) var(--spacing-xl);
  box-shadow: 0 -5px 15px rgba(0,0,0,0.2);
  z-index: 9999;
}

.cookie-text {
  flex-grow: 1;
  font-size: 0.9rem;
}

.cookie-text a {
    color: var(--color-accent);
}

.cookie-buttons {
  display: flex;
  gap: var(--spacing-md);
  flex-shrink: 0;
}

#cookie-accept, #cookie-decline {
    font-size: 0.9rem;
    padding: var(--spacing-sm) var(--spacing-md);
}

#cookie-accept {
  background-color: var(--color-accent);
  color: var(--color-text-light);
}
#cookie-decline {
  background-color: transparent;
  color: var(--color-text-light);
  border: 1px solid var(--color-text-light);
}

/* ------------------- */
/*   Utility Classes   */
/* ------------------- */
.scroll-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: var(--color-accent);
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    text-align: center;
    line-height: 50px;
    font-size: 24px;
    z-index: 100;
    opacity: 0;
    transition: opacity var(--transition-med);
    visibility: hidden;
}
.scroll-to-top.visible {
    opacity: 1;
    visibility: visible;
}

/* ------------------- */
/*   Responsive Design */
/* ------------------- */
@media (max-width: 1024px) {
    .content-block {
        grid-template-columns: 1fr;
    }
    .content-block-img.right {
        grid-row: auto;
        grid-column: auto;
    }
}

@media (max-width: 768px) {
  h1 { font-size: 2.2rem; }
  h2 { font-size: 1.8rem; }
  
  .nav-links {
    position: fixed;
    top: 73px;
    left: 0;
    right: 0;
    width: 100%;
    height: calc(100vh - 73px);
    background-color: white;
    flex-direction: column;
    justify-content: center;
    gap: var(--spacing-xl);
    transform: translateX(-100%);
    transition: transform 0.3s ease-in-out;
    padding: var(--spacing-xxxl);
  }
  
  .nav-links.active {
    transform: translateX(0);
  }
  
  .nav-links li {
    width: 100%;
    text-align: center;
  }
  
  .nav-links a {
      font-size: 1.5rem;
  }

  .dropdown .dropdown-toggle {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
  }

  .dropdown-content {
      position: static;
      box-shadow: none;
      background: none;
      display: block;
      opacity: 1;
      transform: none;
      text-align: center;
      padding: var(--spacing-md) 0 0 0;
  }

  .dropdown:hover .dropdown-content {
      display: block;
  }
  
  .hamburger {
    display: block;
  }
  
  .hamburger.active .bar:nth-child(2) {
    opacity: 0;
  }
  .hamburger.active .bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }
  .hamburger.active .bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }

  .hero { min-height: 70vh; }
  .hero p { font-size: 1rem; }

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

  #cookie-banner {
    flex-direction: column;
    text-align: center;
  }
}