/* ==========================================================================
   MUSEU - Association Loi 1901 (Montpellier)
   Charte Graphique & Architecture CSS Institutionnelle
   Palette : Raw Charcoal (#1C1A17), Earth Ocher (#C87D55), Alabaster (#F9F6F0)
   ========================================================================== */

:root {
  --color-charcoal: #1C1A17;
  --color-charcoal-light: #2D2A26;
  --color-earth-ocher: #C87D55;
  --color-ocher-hover: #A8633F;
  --color-ocher-light: #F3E7DF;
  --color-alabaster: #F9F6F0;
  --color-white: #FFFFFF;
  --color-border: #D9D2C9;
  --color-border-dark: #38342E;
  --color-muted: #615B52;
  --color-light-gray: #EFECE6;
  
  --font-serif: "Georgia", "Cambria", "Times New Roman", serif;
  --font-mono: "Courier New", Courier, monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  
  --header-utility-height: 38px;
  --header-nav-height: 72px;
  --total-header-height: 110px;
  
  --shadow-subtle: 0 4px 20px rgba(28, 26, 23, 0.06);
  --shadow-card: 0 2px 8px rgba(28, 26, 23, 0.04);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--color-alabaster);
  color: var(--color-charcoal);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  padding-top: var(--total-header-height);
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Typography Hierarchy */
h1, h2, h3, h4, .serif-heading {
  font-family: var(--font-serif);
  color: var(--color-charcoal);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

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

h2 {
  font-size: 1.95rem;
  margin-top: 2rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-earth-ocher);
}

h3 {
  font-size: 1.45rem;
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
}

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

p {
  margin-bottom: 1.25rem;
  color: var(--color-charcoal-light);
  max-width: 75ch;
}

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

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

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

/* Monospace & Metadata Tags */
code, pre, .mono-tag, .mono-log, .log-item {
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

.mono-tag {
  display: inline-block;
  background-color: var(--color-light-gray);
  color: var(--color-charcoal);
  padding: 3px 8px;
  border: 1px solid var(--color-border);
  border-radius: 3px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.mono-tag.ocher {
  background-color: var(--color-ocher-light);
  color: var(--color-ocher-hover);
  border-color: var(--color-earth-ocher);
}

/* Layout Containers */
.container {
  width: 100%;
  max-width: 1240px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.container-narrow {
  max-width: 980px;
}

main {
  flex: 1 0 auto;
  padding-bottom: 4rem;
}

/* Section Spacing */
.section {
  padding-top: 3.5rem;
  padding-bottom: 3.5rem;
}

.section-alt {
  background-color: var(--color-white);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

/* ==========================================================================
   Fixed Header Architecture
   ========================================================================== */
.header-wrapper {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 10000;
  box-shadow: var(--shadow-subtle);
}

/* Row 1: Utility Bar */
.utility-bar {
  background: var(--color-charcoal);
  color: var(--color-alabaster);
  height: var(--header-utility-height);
  font-family: var(--font-mono);
  font-size: 13px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--color-border-dark);
}

.utility-bar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

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

.utility-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.utility-item .separator {
  color: var(--color-earth-ocher);
}

.utility-link {
  color: var(--color-alabaster);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.utility-link:hover {
  color: var(--color-earth-ocher);
}

/* Row 2: Main Navigation Bar */
.main-nav-bar {
  background: var(--color-white);
  height: var(--header-nav-height);
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--color-border);
}

.main-nav-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.brand-identity {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-logo-badge {
  background: var(--color-charcoal);
  color: var(--color-white);
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.35rem;
  letter-spacing: 0.1em;
  padding: 6px 14px;
  border-left: 4px solid var(--color-earth-ocher);
}

.brand-titles {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-charcoal);
  line-height: 1.1;
}

.brand-subtitle {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* Navigation Links & Dropdowns */
.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 8px;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 10px 14px;
  color: var(--color-charcoal);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  border-radius: 4px;
  transition: all 0.2s ease;
  min-height: 44px;
}

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

.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  width: 230px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  box-shadow: 0 10px 25px rgba(28, 26, 23, 0.1);
  padding: 8px 0;
  list-style: none;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 10010;
}

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

.nav-dropdown-item a {
  display: block;
  padding: 10px 18px;
  color: var(--color-charcoal);
  font-size: 0.875rem;
  font-weight: 500;
  border-left: 3px solid transparent;
  transition: all 0.15s ease;
  min-height: 44px;
  display: flex;
  align-items: center;
}

.nav-dropdown-item a:hover {
  background-color: var(--color-alabaster);
  color: var(--color-earth-ocher);
  border-left-color: var(--color-earth-ocher);
}

/* Nav CTA Button */
.nav-cta-btn {
  background-color: var(--color-earth-ocher);
  color: var(--color-white) !important;
  font-weight: 600;
  padding: 10px 18px;
  border-radius: 3px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  font-size: 0.85rem;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  transition: background 0.2s ease;
}

.nav-cta-btn:hover {
  background-color: var(--color-ocher-hover) !important;
  color: var(--color-white) !important;
}

/* Mobile Nav Toggle */
.mobile-nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  padding: 8px 12px;
  border-radius: 4px;
  cursor: pointer;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  color: var(--color-charcoal);
}

.mobile-nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-charcoal);
  position: relative;
  transition: all 0.3s ease;
}

.mobile-nav-toggle span::before,
.mobile-nav-toggle span::after {
  content: "";
  position: absolute;
  width: 100%;
  height: 2px;
  background: var(--color-charcoal);
  transition: all 0.3s ease;
}

.mobile-nav-toggle span::before { top: -7px; }
.mobile-nav-toggle span::after { bottom: -7px; }

/* Reading Progress Strip (fixed right) */
.reading-progress-track {
  position: fixed;
  top: 0;
  right: 0;
  width: 4px;
  height: 100%;
  background: rgba(200, 125, 85, 0.2);
  z-index: 10001;
  pointer-events: none;
}

.reading-progress-bar {
  width: 100%;
  height: 0%;
  background: var(--color-earth-ocher);
  transition: height 0.05s ease-out;
}

/* ==========================================================================
   Asymmetrical Grid Layout (1fr : 3fr)
   ========================================================================== */
.asym-grid {
  display: grid;
  grid-template-columns: 1fr 3fr;
  gap: 32px;
  align-items: start;
}

.sidebar-logs {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  padding: 24px;
  border-top: 4px solid var(--color-charcoal);
}

.sidebar-heading {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-charcoal);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

.log-entry {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.5;
  padding: 10px 0;
  border-bottom: 1px dashed var(--color-border);
  color: var(--color-muted);
}

.log-entry:last-child {
  border-bottom: none;
}

.log-label {
  display: block;
  font-weight: 600;
  color: var(--color-charcoal);
  margin-bottom: 3px;
  text-transform: uppercase;
  font-size: 0.75rem;
}

.log-value {
  color: var(--color-charcoal-light);
  word-break: break-word;
}

.main-content-flow {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  padding: 36px 40px;
}

/* ==========================================================================
   Hero & Page Headers
   ========================================================================== */
.page-hero {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  padding: 40px 0 32px;
  margin-bottom: 32px;
}

.hero-meta-breadcrumbs {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-muted);
  margin-bottom: 12px;
}

.hero-meta-breadcrumbs a {
  color: var(--color-muted);
}

.hero-meta-breadcrumbs a:hover {
  color: var(--color-earth-ocher);
}

.hero-tagline-official {
  font-size: 1.15rem;
  line-height: 1.6;
  color: var(--color-charcoal-light);
  max-width: 80ch;
  border-left: 3px solid var(--color-earth-ocher);
  padding-left: 16px;
  margin-top: 16px;
}

/* Slider / Banner Image */
.hero-slider-wrap {
  position: relative;
  overflow: hidden;
  margin-bottom: 32px;
  border: 1px solid var(--color-border);
}

.hero-slider-image {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
}

.hero-slider-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(28, 26, 23, 0.9) 0%, rgba(28, 26, 23, 0.4) 60%, transparent 100%);
  color: var(--color-white);
  padding: 30px;
}

.hero-slider-overlay h2 {
  color: var(--color-white);
  border-bottom: 2px solid var(--color-earth-ocher);
  display: inline-block;
  margin-bottom: 8px;
}

.hero-slider-overlay p {
  color: var(--color-alabaster);
  margin-bottom: 0;
  font-size: 1.05rem;
}

/* ==========================================================================
   Content Cards & Grids
   ========================================================================== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin: 28px 0;
}

.card-grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin: 28px 0;
}

.card-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin: 28px 0;
}

.content-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  padding: 24px;
  display: flex;
  flex-direction: column;
  height: 100%;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.content-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-subtle);
}

.card-image-wrap {
  margin: -24px -24px 20px -24px;
  overflow: hidden;
  border-bottom: 1px solid var(--color-border);
}

.card-image-wrap img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
  transition: transform 0.3s ease;
}

.content-card:hover .card-image-wrap img {
  transform: scale(1.02);
}

.card-body {
  flex: 1 0 auto;
}

.card-footer {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--color-light-gray);
}

/* Metrics & Impact Numbers */
.metric-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin: 28px 0;
}

.metric-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  padding: 24px;
  text-align: center;
  border-top: 3px solid var(--color-earth-ocher);
}

.metric-number {
  font-family: var(--font-serif);
  font-size: 2.75rem;
  font-weight: 700;
  color: var(--color-charcoal);
  line-height: 1;
  margin-bottom: 8px;
}

.metric-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-muted);
}

/* ==========================================================================
   Buttons & Non-Commercial CTAs
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-decoration: none;
  border-radius: 3px;
  cursor: pointer;
  transition: all 0.2s ease;
  min-height: 44px;
  border: 1px solid transparent;
}

.btn-primary {
  background-color: var(--color-earth-ocher);
  color: var(--color-white) !important;
}

.btn-primary:hover {
  background-color: var(--color-ocher-hover) !important;
}

.btn-secondary {
  background-color: var(--color-charcoal);
  color: var(--color-white) !important;
}

.btn-secondary:hover {
  background-color: var(--color-charcoal-light) !important;
}

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

.btn-outline:hover {
  background-color: var(--color-charcoal);
  color: var(--color-white) !important;
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 20px 0;
}

/* ==========================================================================
   Data Tables & Financial Ledgers
   ========================================================================== */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  margin: 24px 0;
  border: 1px solid var(--color-border);
}

.institutional-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-white);
  font-size: 0.9rem;
  text-align: left;
}

.institutional-table th {
  background: var(--color-charcoal);
  color: var(--color-white);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 14px 18px;
  border-right: 1px solid var(--color-border-dark);
}

.institutional-table th:last-child {
  border-right: none;
}

.institutional-table td {
  padding: 12px 18px;
  border-bottom: 1px solid var(--color-border);
  border-right: 1px solid var(--color-border);
  color: var(--color-charcoal-light);
}

.institutional-table td:last-child {
  border-right: none;
}

.institutional-table tr:nth-child(even) td {
  background-color: var(--color-alabaster);
}

.institutional-table tr:hover td {
  background-color: var(--color-ocher-light);
}

.institutional-table .number-cell {
  font-family: var(--font-mono);
  text-align: right;
}

/* ==========================================================================
   Forms (Monospace / Institutional Style)
   ========================================================================== */
.form-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  padding: 32px;
  margin: 24px 0;
}

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-charcoal);
  margin-bottom: 8px;
  font-weight: 600;
}

.form-control {
  width: 100%;
  padding: 12px 14px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--color-charcoal);
  background-color: var(--color-alabaster);
  border: 1px solid var(--color-border);
  border-radius: 3px;
  transition: border-color 0.2s ease, background-color 0.2s ease;
  min-height: 44px;
}

.form-control:focus {
  outline: none;
  border-color: var(--color-earth-ocher);
  background-color: var(--color-white);
  box-shadow: 0 0 0 3px rgba(200, 125, 85, 0.15);
}

textarea.form-control {
  min-height: 120px;
  resize: vertical;
}

.form-help {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-muted);
  margin-top: 6px;
}

/* Declaration / Callout Box */
.declaration-box {
  background-color: var(--color-ocher-light);
  border-left: 4px solid var(--color-earth-ocher);
  padding: 20px 24px;
  margin: 24px 0;
  border-radius: 0 4px 4px 0;
}

.declaration-box p:last-child {
  margin-bottom: 0;
}

/* Timeline Components */
.timeline {
  position: relative;
  margin: 32px 0;
  padding-left: 30px;
  border-left: 2px solid var(--color-earth-ocher);
}

.timeline-item {
  position: relative;
  margin-bottom: 30px;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -37px;
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-charcoal);
  border: 2px solid var(--color-earth-ocher);
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-earth-ocher);
  font-weight: 700;
  margin-bottom: 4px;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer-institutional {
  background: var(--color-charcoal);
  color: var(--color-alabaster);
  padding-top: 50px;
  padding-bottom: 40px;
  border-top: 4px solid var(--color-earth-ocher);
  font-size: 0.9rem;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 36px;
  margin-bottom: 40px;
  padding-bottom: 36px;
  border-bottom: 1px solid var(--color-border-dark);
}

.footer-col h4 {
  color: var(--color-white);
  font-family: var(--font-serif);
  font-size: 1.1rem;
  margin-bottom: 16px;
  position: relative;
  padding-bottom: 8px;
}

.footer-col h4::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background: var(--color-earth-ocher);
}

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

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

.footer-links a {
  color: var(--color-border);
  text-decoration: none;
  transition: color 0.15s ease;
  display: inline-block;
  min-height: 24px;
}

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

.footer-contact-details {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--color-border);
}

.footer-contact-details p {
  color: var(--color-border);
  margin-bottom: 8px;
}

.footer-bottom {
  text-align: center;
  padding-top: 20px;
}

.footer-mandatory-string {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.6;
  color: #B5AEA4;
  max-width: 900px;
  margin: 0 auto 16px auto;
  background: #12100E;
  padding: 16px 20px;
  border: 1px solid var(--color-border-dark);
  text-align: justify;
}

.footer-legal-links {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

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

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 992px) {
  :root {
    --total-header-height: 110px;
  }
  
  .asym-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  
  .card-grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
  
  .reading-progress-track {
    display: none !important;
  }
  
  .mobile-nav-toggle {
    display: inline-flex;
  }
  
  .nav-menu {
    position: fixed;
    top: var(--total-header-height);
    left: 0;
    width: 100%;
    height: calc(100vh - var(--total-header-height));
    background: var(--color-white);
    flex-direction: column;
    align-items: stretch;
    padding: 24px;
    gap: 12px;
    overflow-y: auto;
    display: none;
    border-top: 1px solid var(--color-border);
  }
  
  .nav-menu.is-active {
    display: flex;
  }
  
  .nav-dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    width: 100%;
    box-shadow: none;
    border-left: 2px solid var(--color-earth-ocher);
    background: var(--color-alabaster);
    padding-left: 10px;
    margin-top: 6px;
  }
  
  .utility-items {
    gap: 10px;
    font-size: 11px;
  }
}

@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.6rem;
  }
  
  .utility-bar {
    display: none;
  }
  
  :root {
    --total-header-height: 72px;
  }
  
  body {
    padding-top: var(--total-header-height);
  }
  
  .nav-menu {
    top: var(--total-header-height);
    height: calc(100vh - var(--total-header-height));
  }
  
  .card-grid-4, .card-grid-2 {
    grid-template-columns: 1fr;
  }
  
  .footer-top {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  
  .main-content-flow {
    padding: 24px 20px;
  }
}