/* ==========================================================================
   ASSOCIATION G I ENVIRON. CYNEGET. CAROUX ESPINOUSE - STYLE ARCHITECTURE
   Loi 1901 - Utilité Publique & Conservation de la Biodiversité
   ========================================================================== */

/* 1. CSS VARIABLES & SYSTEM ARCHITECTURE */
:root {
  --color-raw-charcoal: #1C1A17;
  --color-charcoal-light: #2C2925;
  --color-earth-ocher: #C87D55;
  --color-earth-ocher-hover: #B06942;
  --color-ocher-subtle: rgba(200, 125, 85, 0.12);
  --color-alabaster-bg: #F9F6F0;
  --color-card-white: #FFFFFF;
  --color-border-line: #D9D2C9;
  --color-border-subtle: #EBE5DC;
  --color-text-main: #1C1A17;
  --color-text-muted: #57534E;
  --color-text-light: #F9F6F0;
  --color-accent-green: #2E5A44;
  --color-badge-bg: #EAE5DC;

  --font-serif: "Playfair Display", "Times New Roman", Georgia, serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", "Courier New", Courier, monospace;

  --header-height: 110px;
  --transition-normal: 0.25s ease-in-out;
}

/* 2. RESET & FOUNDATIONS */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  background-color: var(--color-alabaster-bg);
  color: var(--color-text-main);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  padding-top: var(--header-height);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 3. TYPOGRAPHIC HIERARCHY */
h1, h2, h3, h4, .serif-heading {
  font-family: var(--font-serif);
  color: var(--color-raw-charcoal);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

h1 {
  font-size: 2.5rem;
  margin-bottom: 1.25rem;
}

h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
  position: relative;
}

h3 {
  font-size: 1.4rem;
  margin-bottom: 0.75rem;
}

h4 {
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
}

p {
  margin-bottom: 1.2rem;
  color: var(--color-text-muted);
  max-width: 75ch;
}

strong {
  color: var(--color-raw-charcoal);
  font-weight: 600;
}

a {
  color: var(--color-earth-ocher);
  text-decoration: none;
  transition: color var(--transition-normal);
}

a:hover {
  color: var(--color-earth-ocher-hover);
}

.mono-meta {
  font-family: var(--font-mono);
  font-size: 0.825rem;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* 4. READING PROGRESS STRIP */
#reading-progress-strip {
  position: fixed;
  top: 0;
  right: 0;
  width: 4px;
  height: 100%;
  background: rgba(200, 125, 85, 0.2);
  z-index: 10001;
}

#reading-progress-fill {
  width: 100%;
  height: 0%;
  background-color: var(--color-earth-ocher);
  transition: height 0.05s linear;
}

/* 5. HEADER ARCHITECTURE */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 10000;
  box-shadow: 0 2px 10px rgba(28, 26, 23, 0.08);
}

/* Row 1: Utility Bar */
.utility-bar {
  background: var(--color-raw-charcoal);
  color: var(--color-text-light);
  height: 38px;
  font-family: var(--font-mono);
  font-size: 13px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.utility-inner {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.utility-info {
  display: flex;
  gap: 1.5rem;
  align-items: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.utility-tag {
  color: var(--color-earth-ocher);
  font-weight: 600;
}

.utility-links a {
  color: #D9D2C9;
  text-decoration: underline;
  text-underline-offset: 3px;
  font-size: 12px;
}

.utility-links a:hover {
  color: #FFFFFF;
}

/* Row 2: Main Nav */
.main-nav {
  background: #FFFFFF;
  height: 72px;
  border-bottom: 1px solid var(--color-border-line);
}

.nav-inner {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: flex;
  flex-direction: column;
  text-decoration: none;
}

.brand-title {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-raw-charcoal);
  line-height: 1.1;
  letter-spacing: -0.01em;
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--color-earth-ocher);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-top: 2px;
}

/* Navigation List */
.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 0.5rem;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  padding: 0.55rem 0.85rem;
  color: var(--color-raw-charcoal);
  font-weight: 500;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  border-radius: 4px;
  transition: all var(--transition-normal);
  white-space: nowrap;
}

.nav-link:hover, .nav-item:hover > .nav-link {
  color: var(--color-earth-ocher);
  background: var(--color-ocher-subtle);
}

.nav-link.active {
  color: var(--color-earth-ocher);
  font-weight: 700;
}

/* Dropdown */
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background: #FFFFFF;
  min-width: 220px;
  border: 1px solid var(--color-border-line);
  box-shadow: 0 8px 24px rgba(28, 26, 23, 0.12);
  border-radius: 6px;
  list-style: none;
  padding: 0.5rem 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all 0.2s ease;
  z-index: 1000;
}

.nav-item:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-link {
  display: block;
  padding: 0.6rem 1.25rem;
  color: var(--color-raw-charcoal);
  font-size: 0.875rem;
  transition: background var(--transition-normal);
}

.dropdown-link:hover {
  background: var(--color-alabaster-bg);
  color: var(--color-earth-ocher);
}

/* Nav Action Button */
.btn-nav-action {
  background: var(--color-earth-ocher);
  color: #FFFFFF !important;
  padding: 0.55rem 1.15rem;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.825rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  transition: background var(--transition-normal);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
}

.btn-nav-action:hover {
  background: var(--color-earth-ocher-hover);
  color: #FFFFFF;
}

/* Mobile Toggle */
.mobile-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--color-border-line);
  padding: 0.5rem;
  border-radius: 4px;
  cursor: pointer;
  min-width: 44px;
  min-height: 44px;
}

.mobile-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-raw-charcoal);
  margin: 4px 0;
  transition: all 0.3s ease;
}

/* 6. CONTAINER & LAYOUT */
.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section-spacing {
  padding: 4.5rem 0;
}

.section-spacing-sm {
  padding: 2.5rem 0;
}

/* Asymmetrical Grid (1fr : 3fr) */
.asym-grid {
  display: grid;
  grid-template-columns: 1fr 3fr;
  gap: 30px;
  align-items: start;
}

/* Monospace Sidebar Log */
.sidebar-log {
  background: #FFFFFF;
  border: 1px solid var(--color-border-line);
  padding: 1.5rem;
  border-radius: 8px;
}

.sidebar-header {
  border-bottom: 2px solid var(--color-earth-ocher);
  padding-bottom: 0.75rem;
  margin-bottom: 1.25rem;
}

.sidebar-title {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-raw-charcoal);
  letter-spacing: 0.05em;
}

.sidebar-data-list {
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.sidebar-data-list li {
  padding: 0.6rem 0;
  border-bottom: 1px dashed var(--color-border-subtle);
  display: flex;
  flex-direction: column;
}

.sidebar-data-list li span.label {
  color: var(--color-raw-charcoal);
  font-weight: 600;
  margin-bottom: 2px;
}

.sidebar-data-list li span.val {
  color: var(--color-text-muted);
  word-break: break-all;
}

/* 7. CARDS & SURFACES */
.card-white {
  background: var(--color-card-white);
  border: 1px solid var(--color-border-line);
  border-radius: 8px;
  padding: 2.25rem;
  box-shadow: 0 2px 8px rgba(28, 26, 23, 0.03);
}

.card-white-sm {
  background: var(--color-card-white);
  border: 1px solid var(--color-border-line);
  border-radius: 8px;
  padding: 1.5rem;
}

.card-accent {
  border-top: 3px solid var(--color-earth-ocher);
}

.card-dark {
  background: var(--color-raw-charcoal);
  color: var(--color-text-light);
  border-radius: 8px;
  padding: 2.25rem;
}

.card-dark h1, .card-dark h2, .card-dark h3, .card-dark h4 {
  color: #FFFFFF;
}

.card-dark p {
  color: #D9D2C9;
}

/* 8. BUTTONS & ACTIONS (NON-COMMERCIAL) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 0.75rem 1.5rem;
  border-radius: 4px;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-normal);
  border: 1px solid transparent;
  min-height: 44px;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-earth-ocher);
  color: #FFFFFF;
  border-color: var(--color-earth-ocher);
}

.btn-primary:hover {
  background: var(--color-earth-ocher-hover);
  border-color: var(--color-earth-ocher-hover);
  color: #FFFFFF;
}

.btn-outline {
  background: transparent;
  color: var(--color-raw-charcoal);
  border-color: var(--color-raw-charcoal);
}

.btn-outline:hover {
  background: var(--color-raw-charcoal);
  color: #FFFFFF;
}

.btn-outline-white {
  background: transparent;
  color: #FFFFFF;
  border-color: #FFFFFF;
}

.btn-outline-white:hover {
  background: #FFFFFF;
  color: var(--color-raw-charcoal);
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1.5rem;
}

/* 9. BADGES & LABELS */
.badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  padding: 0.25rem 0.65rem;
  border-radius: 3px;
  background: var(--color-badge-bg);
  color: var(--color-raw-charcoal);
  border: 1px solid var(--color-border-line);
}

.badge-ocher {
  background: var(--color-ocher-subtle);
  color: var(--color-earth-ocher);
  border-color: rgba(200, 125, 85, 0.3);
}

.badge-green {
  background: rgba(46, 90, 68, 0.1);
  color: var(--color-accent-green);
  border-color: rgba(46, 90, 68, 0.3);
}

/* 10. HERO SECTION */
.hero-block {
  background: var(--color-raw-charcoal);
  color: #FFFFFF;
  position: relative;
  overflow: hidden;
  border-radius: 10px;
  margin-bottom: 3.5rem;
  border: 1px solid var(--color-border-line);
}

.hero-image-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  max-height: 520px;
  overflow: hidden;
}

.hero-image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(28, 26, 23, 0.4) 0%, rgba(28, 26, 23, 0.88) 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 3rem;
}

.hero-heading {
  font-family: var(--font-serif);
  font-size: 2.75rem;
  color: #FFFFFF;
  max-width: 900px;
  line-height: 1.15;
  margin-bottom: 1rem;
}

.hero-summary {
  font-size: 1.125rem;
  color: #F9F6F0;
  max-width: 800px;
  line-height: 1.6;
  margin-bottom: 1.75rem;
  border-left: 3px solid var(--color-earth-ocher);
  padding-left: 1.25rem;
}

/* 11. PILLARS & IMPACT GRID */
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}

.pillar-card {
  background: #FFFFFF;
  border: 1px solid var(--color-border-line);
  border-radius: 8px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

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

.pillar-content {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.pillar-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
  color: var(--color-raw-charcoal);
}

.pillar-desc {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.55;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

/* Impact Numbers Grid */
.impact-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin: 3rem 0;
}

.impact-stat {
  background: #FFFFFF;
  border: 1px solid var(--color-border-line);
  padding: 2rem 1.5rem;
  text-align: center;
  border-radius: 8px;
}

.impact-number {
  font-family: var(--font-mono);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-earth-ocher);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.impact-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-raw-charcoal);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

/* 12. DATA TABLES & FORMS */
.data-table-wrap {
  overflow-x: auto;
  margin: 1.5rem 0;
  border: 1px solid var(--color-border-line);
  border-radius: 8px;
  background: #FFFFFF;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  text-align: left;
}

.data-table th {
  background: var(--color-raw-charcoal);
  color: #FFFFFF;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.9rem 1.25rem;
  font-weight: 600;
}

.data-table td {
  padding: 0.9rem 1.25rem;
  border-bottom: 1px solid var(--color-border-subtle);
  color: var(--color-text-main);
}

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

.data-table tr:nth-child(even) td {
  background: #FAF8F5;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--color-raw-charcoal);
  margin-bottom: 0.4rem;
  letter-spacing: 0.04em;
}

.form-input, .form-textarea, .form-select {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--color-raw-charcoal);
  background: #FFFFFF;
  border: 1px solid var(--color-border-line);
  border-radius: 4px;
  transition: border-color var(--transition-normal);
}

.form-input:focus, .form-textarea:focus, .form-select:focus {
  outline: none;
  border-color: var(--color-earth-ocher);
  box-shadow: 0 0 0 3px var(--color-ocher-subtle);
}

/* 13. FOOTER */
.site-footer {
  background: var(--color-raw-charcoal);
  color: #D9D2C9;
  border-top: 4px solid var(--color-earth-ocher);
  padding-top: 4rem;
  padding-bottom: 2.5rem;
  margin-top: 5rem;
  font-size: 0.9rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.footer-heading {
  font-family: var(--font-serif);
  color: #FFFFFF;
  font-size: 1.15rem;
  margin-bottom: 1.25rem;
}

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

.footer-links li {
  margin-bottom: 0.6rem;
}

.footer-links a {
  color: #D9D2C9;
  font-size: 0.875rem;
  transition: color var(--transition-normal);
}

.footer-links a:hover {
  color: var(--color-earth-ocher);
}

.footer-contact-block {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.6;
}

.footer-contact-block a {
  color: var(--color-earth-ocher);
}

.footer-bottom {
  border-top: 1px solid rgba(217, 210, 201, 0.15);
  padding-top: 2rem;
}

.footer-disclosure {
  font-size: 0.825rem;
  color: #A8A29E;
  line-height: 1.6;
  max-width: 960px;
  margin: 0 auto 1.5rem auto;
  text-align: center;
}

.footer-sub-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  list-style: none;
  font-size: 0.8rem;
  font-family: var(--font-mono);
}

.footer-sub-links a {
  color: #D9D2C9;
}

.footer-sub-links a:hover {
  color: #FFFFFF;
}

/* 14. RESPONSIVE ARCHITECTURE */
@media (max-width: 992px) {
  body {
    padding-top: 90px;
  }
  
  .utility-bar {
    display: none;
  }
  
  .main-nav {
    height: 70px;
  }

  #reading-progress-strip {
    display: none;
  }

  .mobile-toggle {
    display: block;
  }

  .nav-menu {
    position: fixed;
    top: 70px;
    left: 0;
    width: 100%;
    height: calc(100vh - 70px);
    background: #FFFFFF;
    flex-direction: column;
    align-items: stretch;
    padding: 1.5rem;
    overflow-y: auto;
    display: none;
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
  }

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

  .nav-item {
    width: 100%;
    border-bottom: 1px solid var(--color-border-subtle);
  }

  .nav-link {
    padding: 1rem 0.5rem;
    font-size: 1rem;
  }

  .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    background: var(--color-alabaster-bg);
    padding: 0.5rem;
    border-radius: 4px;
    margin-bottom: 0.5rem;
    display: none;
  }

  .dropdown-menu.open {
    display: block;
  }

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

  .pillars-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .impact-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.6rem;
  }

  .hero-heading {
    font-size: 1.85rem;
  }

  .hero-overlay {
    padding: 1.75rem;
  }

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

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .card-white {
    padding: 1.5rem;
  }

  .btn-group {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    width: 100%;
  }
}