/*
  Analyse Spatiale – Industrie et Gouvernance
  Stylesheet
*/

/* 1. ROOT & RESET
--------------------------------------------*/
:root {
  --color-primary: #0a192f; /* Deep Navy Blue */
  --color-secondary: #172a45; /* Muted Blue */
  --color-accent: #64ffda; /* Changed for visibility, soft institutional blue is hard for links */
  --color-text: #8892b0; /* Light Slate - for body text */
  --color-heading: #ccd6f6; /* Lightest Slate - for headings */
  --color-background-light: #f0f2f5; /* Light Neutral Grey */
  --color-background-dark: #0a192f;
  --color-white: #ffffff;
  --font-primary: 'Lato', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Fira Mono', 'Roboto Mono', monospace;
  --fz-xxs: 12px;
  --fz-xs: 13px;
  --fz-sm: 14px;
  --fz-md: 16px;
  --fz-lg: 18px;
  --fz-xl: 20px;
  --fz-xxl: 22px;
  --fz-heading-sm: 28px;
  --fz-heading-md: 36px;
  --fz-heading-lg: clamp(40px, 8vw, 60px);
  --border-radius: 4px;
  --nav-height: 100px;
  --nav-scroll-height: 70px;
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-xxl: 64px;
  --section-padding: 100px;
  --transition: all 0.25s cubic-bezier(0.645, 0.045, 0.355, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 100%;
}

body {
  font-family: var(--font-primary);
  background-color: var(--color-background-dark);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
}

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

a:hover, a:focus {
  color: var(--color-white);
  outline: none;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 20px 0;
  color: var(--color-heading);
  line-height: 1.2;
  font-weight: 700;
}

p {
  margin-bottom: 1.5rem;
}

.container {
  width: 90%;
  max-width: 1100px;
  margin: 0 auto;
}

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

.section-light {
    background-color: #172a45;
}

.section-dark {
    background-color: #0a192f;
}

.section-title {
  font-size: var(--fz-heading-md);
  position: relative;
  margin-bottom: var(--spacing-xxl);
  text-align: center;
}
.section-title::after {
  content: '';
  display: block;
  width: 50px;
  height: 3px;
  background-color: var(--color-accent);
  margin: 10px auto 0;
}

/* 2. HEADER & NAVIGATION
--------------------------------------------*/
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  background-color: rgba(10, 25, 47, 0.85);
  backdrop-filter: blur(10px);
  z-index: 1000;
  transition: var(--transition);
}

.header.scrolled {
  height: var(--nav-scroll-height);
  box-shadow: 0 10px 30px -10px rgba(2, 12, 27, 0.7);
}

.main-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
}

.logo a {
  font-size: var(--fz-xl);
  font-weight: 700;
  color: var(--color-heading);
  letter-spacing: -1px;
}

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

.nav-links a {
  color: var(--color-heading);
  font-size: var(--fz-sm);
  padding: var(--spacing-sm);
  counter-increment: item 1;
}

.nav-links a::before {
  content: '0' counter(item) '.';
  margin-right: 5px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: var(--fz-xs);
  text-align: right;
}

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

.dropdown {
  position: relative;
}

.dropdown-content {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background-color: var(--color-secondary);
  box-shadow: 0 8px 16px rgba(0,0,0,0.2);
  z-index: 1;
  min-width: 220px;
  border-radius: var(--border-radius);
  padding: var(--spacing-sm) 0;
}

.dropdown:hover .dropdown-content {
  display: block;
}

.dropdown-content a {
  color: var(--color-heading);
  padding: 12px 16px;
  display: block;
  text-align: left;
}
.dropdown-content a::before {
    content: none;
}
.dropdown-content a:hover {
    background-color: rgba(100, 255, 218, 0.1);
}

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-around;
  width: 30px;
  height: 25px;
  background: transparent;
  border: none;
  cursor: pointer;
  z-index: 1100;
}

.mobile-menu-toggle .bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-accent);
  border-radius: 10px;
  transition: all 0.3s ease-in-out;
}

/* 3. HERO SECTION
--------------------------------------------*/
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  background-size: cover;
  background-position: center;
  padding: 0;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-primary);
  opacity: 0.85;
  filter: grayscale(80%) sepia(20%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
  padding: 0 var(--spacing-lg);
}

.hero h1 {
  font-size: var(--fz-heading-lg);
  color: var(--color-heading);
  margin-bottom: var(--spacing-lg);
}

.hero p {
  font-size: var(--fz-lg);
  color: var(--color-text);
  max-width: 600px;
  margin: 0 auto;
}

.hero.sub-page {
    min-height: 40vh;
}
.hero.sub-page .hero-content {
    max-width: 1000px;
}
.hero.sub-page h1 {
    font-size: clamp(32px, 5vw, 48px);
}

/* 4. PAGE CONTENT & CARDS
--------------------------------------------*/
.content-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xxl);
}

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

.feature-card {
    background-color: var(--color-secondary);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius);
    text-align: center;
    border: 1px solid #1d2d44;
    transition: var(--transition);
}
.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px -15px rgba(2,12,27,0.7);
}
.feature-card h3 {
    color: var(--color-heading);
    font-size: var(--fz-xl);
    margin-bottom: var(--spacing-md);
}
.feature-card p {
    font-size: var(--fz-sm);
    margin-bottom: 0;
}

.text-block {
    max-width: 800px;
    margin: 0 auto;
}
.text-block p, .text-block ul, .text-block ol {
    font-size: var(--fz-lg);
    line-height: 1.7;
}
.text-block h2, .text-block h3 {
    margin-top: 2.5rem;
}
.text-block ul, .text-block ol {
    margin-bottom: 1.5rem;
    padding-left: 20px;
}

.article-content {
    background-color: var(--color-background-dark);
    padding: var(--section-padding) 0;
}
.article-content h2,
.article-content h3 {
    color: var(--color-heading);
}

.article-section {
    margin-bottom: 3rem;
}

.related-articles {
    border-top: 1px solid var(--color-secondary);
    padding-top: var(--section-padding);
}
.related-articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}
.related-card {
    background-color: var(--color-secondary);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
}
.related-card h4 {
    color: var(--color-heading);
    font-size: var(--fz-lg);
    margin-bottom: var(--spacing-sm);
}
.related-card a {
    font-weight: 700;
}
.related-card a::after {
    content: " →";
}

/* About Page Specific */
.about-section {
    display: grid;
    grid-template-columns: 3fr 2fr;
    gap: 50px;
    align-items: center;
}
.about-section-image {
    border-radius: var(--border-radius);
    overflow: hidden;
    position: relative;
}
.about-section-image img {
    filter: grayscale(80%) contrast(1.1);
    mix-blend-mode: multiply;
    transition: var(--transition);
}
.about-section-image:hover img {
    filter: grayscale(0) contrast(1);
    mix-blend-mode: normal;
}

/* 5. CONTACT FORM
--------------------------------------------*/
.contact-form {
  max-width: 700px;
  margin: 0 auto;
}

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

.form-group label {
  display: block;
  margin-bottom: var(--spacing-sm);
  color: var(--color-heading);
  font-size: var(--fz-sm);
}

.form-control {
  width: 100%;
  padding: 12px;
  background-color: var(--color-secondary);
  border: 1px solid #1d2d44;
  border-radius: var(--border-radius);
  color: var(--color-heading);
  font-size: var(--fz-md);
  transition: var(--transition);
}
.form-control:focus {
  outline: none;
  border-color: var(--color-accent);
}

textarea.form-control {
  resize: vertical;
  min-height: 150px;
}

.btn-submit {
  padding: 12px 24px;
  background-color: var(--color-accent);
  color: var(--color-primary);
  border: 1px solid var(--color-accent);
  border-radius: var(--border-radius);
  cursor: pointer;
  font-size: var(--fz-md);
  font-weight: 700;
  transition: var(--transition);
}

.btn-submit:hover {
  background-color: transparent;
  color: var(--color-accent);
}

.form-disclaimer {
    background-color: var(--color-secondary);
    padding: var(--spacing-lg);
    border-left: 3px solid var(--color-accent);
    margin-top: var(--spacing-xl);
    font-style: italic;
    font-size: var(--fz-sm);
}
.form-disclaimer p {
    margin-bottom: 0;
}

/* 6. FOOTER
--------------------------------------------*/
.footer {
  background-color: #020c1b;
  color: var(--color-text);
  padding: var(--spacing-xxl) 0;
  font-size: var(--fz-sm);
}

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

.footer-column h4 {
  color: var(--color-heading);
  font-size: var(--fz-md);
  margin-bottom: var(--spacing-md);
}

.footer-column p {
  margin-bottom: var(--spacing-md);
}

.footer-links {
  list-style: none;
}

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

.footer-links a {
  color: var(--color-text);
}
.footer-links a:hover {
  color: var(--color-accent);
  padding-left: 5px;
}

.footer-bottom {
  text-align: center;
  margin-top: var(--spacing-xxl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-secondary);
  font-size: var(--fz-xs);
}

/* 7. COOKIE BANNER
--------------------------------------------*/
#cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: rgba(10, 25, 47, 0.95);
  backdrop-filter: blur(5px);
  color: var(--color-text);
  padding: var(--spacing-lg);
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-lg);
  z-index: 9999;
  border-top: 1px solid var(--color-secondary);
}

#cookie-banner p {
  margin: 0;
  font-size: var(--fz-sm);
}

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

.cookie-btn {
  padding: 8px 16px;
  border-radius: var(--border-radius);
  cursor: pointer;
  border: 1px solid var(--color-accent);
  transition: var(--transition);
  font-size: var(--fz-sm);
}

.cookie-accept {
  background-color: var(--color-accent);
  color: var(--color-primary);
}
.cookie-accept:hover {
  background-color: transparent;
  color: var(--color-accent);
}

.cookie-decline {
  background-color: transparent;
  color: var(--color-accent);
}
.cookie-decline:hover {
  background-color: var(--color-accent);
  color: var(--color-primary);
}


/* 8. RESPONSIVE DESIGN
--------------------------------------------*/
@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 0;
    right: 0;
    width: 70%;
    height: 100vh;
    background-color: var(--color-secondary);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transform: translateX(100%);
    transition: transform 0.3s ease-in-out;
    gap: var(--spacing-xl);
  }

  .nav-links.open {
    transform: translateX(0);
    box-shadow: -10px 0px 30px -15px rgba(2,12,27,0.7);
  }
  
  .nav-links li {
    width: 100%;
    text-align: center;
  }
  
  .nav-links a {
    font-size: var(--fz-lg);
    display: block;
    width: 100%;
  }

  .dropdown-content {
      position: static;
      background-color: transparent;
      box-shadow: none;
      padding: 0;
      min-width: unset;
      text-align: center;
  }
  
  .dropdown-content a {
    padding: 10px;
    font-size: var(--fz-md);
  }

  .dropdown:hover .dropdown-content {
      display: none; /* JS will handle this */
  }
  .dropdown.open .dropdown-content {
      display: block;
  }


  .mobile-menu-toggle {
    display: flex;
  }
  .mobile-menu-toggle.open .bar:nth-child(1) {
    transform: rotate(45deg) translate(7px, 7px);
  }
  .mobile-menu-toggle.open .bar:nth-child(2) {
    opacity: 0;
  }
  .mobile-menu-toggle.open .bar:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
  }
  
  .about-section {
    grid-template-columns: 1fr;
  }
  .about-section-image {
    grid-row: 1;
  }
  
  #cookie-banner {
    flex-direction: column;
    text-align: center;
  }
}

/* Back to top button */
#to-top-btn {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 40px;
  height: 40px;
  background-color: var(--color-accent);
  color: var(--color-primary);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: bold;
  z-index: 999;
  opacity: 0;
  transition: opacity 0.3s ease-in-out, visibility 0.3s ease-in-out;
}

#to-top-btn.visible {
  opacity: 1;
  display: flex;
}