/* ============================================================
   URAL-FRANCE.FR — Design System "Acier & Steppe"
   Palette : charbon / acier / rouille / ocre-steppe / ivoire
   Polices : Barlow Condensed (display) + Lora (body) + Space Mono (technique)
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Barlow+Condensed:wght@600;700&family=Lora:ital,wght@0,400;0,600;1,400&family=Space+Mono:ital@0;1&display=swap');

/* ============================================================
   1. DESIGN TOKENS
   ============================================================ */
:root {
  /* Palette principale */
  --charbon:      #1A1A1A;
  --acier:        #2C3440;
  --rouille:      #8B3A2A;
  --ocre-steppe:  #C4873A;
  --ivoire:       #F0EDE8;
  --creme-huile:  #E8E0D0;
  --chrome:       #9AA5B4;

  /* Dérivées avec opacité */
  --charbon-90:   rgba(26, 26, 26, 0.90);
  --charbon-80:   rgba(26, 26, 26, 0.80);
  --charbon-65:   rgba(26, 26, 26, 0.65);
  --charbon-40:   rgba(26, 26, 26, 0.40);
  --charbon-20:   rgba(26, 26, 26, 0.20);
  --charbon-10:   rgba(26, 26, 26, 0.10);
  --charbon-06:   rgba(26, 26, 26, 0.06);
  --charbon-04:   rgba(26, 26, 26, 0.04);
  --acier-80:     rgba(44, 52, 64, 0.80);
  --acier-40:     rgba(44, 52, 64, 0.40);
  --rouille-20:   rgba(139, 58, 42, 0.20);
  --rouille-10:   rgba(139, 58, 42, 0.10);
  --ocre-20:      rgba(196, 135, 58, 0.20);
  --ivoire-95:    rgba(240, 237, 232, 0.95);
  --ivoire-75:    rgba(240, 237, 232, 0.75);
  --ivoire-40:    rgba(240, 237, 232, 0.40);

  /* Typographie */
  --ff-display:  'Barlow Condensed', 'Arial Narrow', sans-serif;
  --ff-body:     'Lora', Georgia, serif;
  --ff-mono:     'Space Mono', 'Courier New', monospace;

  /* Mesures */
  --measure-article: 720px;
  --measure-wide:    1280px;
  --measure-hero:    1440px;
  --gutter:          clamp(1rem, 4vw, 2rem);

  /* Transitions */
  --ease:      cubic-bezier(0.22, 1, 0.36, 1);
  --dur-fast:  200ms;
  --dur:       380ms;
  --dur-slow:  560ms;

  /* Espacement base 8px */
  --sp-1:  0.5rem;
  --sp-2:  1rem;
  --sp-3:  1.5rem;
  --sp-4:  2rem;
  --sp-6:  3rem;
  --sp-8:  4rem;
  --sp-12: 6rem;
  --sp-16: 8rem;

  /* Z-index */
  --z-base:  0;
  --z-card:  10;
  --z-nav:   100;
  --z-modal: 200;

  /* Ombres */
  --shadow-sm:  0 1px 4px rgba(26,26,26,0.10);
  --shadow-md:  0 4px 16px rgba(26,26,26,0.14);
  --shadow-lg:  0 12px 36px rgba(26,26,26,0.18);
  --shadow-xl:  0 24px 64px rgba(26,26,26,0.22);

  /* Bordures */
  --radius-sm: 2px;
  --radius-md: 3px;
  --border:    1px solid var(--charbon-10);
  --border-md: 1px solid var(--charbon-20);
}

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

html {
  font-size: 18px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--ff-body);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--charbon);
  background: var(--ivoire);
  -webkit-font-smoothing: antialiased;
}

img, video { display: block; max-width: 100%; height: auto; }

a { color: inherit; text-decoration: none; }

ul, ol { list-style: none; }

button { font-family: inherit; cursor: pointer; border: none; background: none; }

/* ============================================================
   3. TYPOGRAPHIE
   ============================================================ */
h1, h2, h3, h4 {
  font-family: var(--ff-display);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  line-height: 1.1;
  color: var(--acier);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.4rem, 3vw, 2rem); }
h3 { font-size: clamp(1.1rem, 2.5vw, 1.45rem); }
h4 { font-size: 1.1rem; }

p { margin-bottom: 1.2em; }

strong { font-weight: 600; }

em { font-style: italic; }

/* Filet double acier sous H2 (signature visuelle #3) */
.article-body h2 {
  margin-top: var(--sp-6);
  margin-bottom: var(--sp-3);
  padding-bottom: var(--sp-2);
  position: relative;
}
.article-body h2::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 3.5rem;
  height: 5px;
  background: linear-gradient(
    to bottom,
    var(--chrome) 0px,
    var(--chrome) 1px,
    transparent 1px,
    transparent 3px,
    var(--acier) 3px,
    var(--acier) 5px
  );
}

.article-body h3 {
  margin-top: var(--sp-4);
  margin-bottom: var(--sp-2);
  color: var(--rouille);
  font-size: 1.2rem;
  text-transform: none;
  letter-spacing: 0.01em;
}

.article-body ul, .article-body ol {
  list-style: disc;
  padding-left: 1.5rem;
  margin-bottom: 1.2em;
}
.article-body ol { list-style: decimal; }
.article-body li { margin-bottom: 0.4em; }

.article-body a {
  color: var(--rouille);
  text-decoration: underline;
  text-decoration-color: var(--rouille-20);
  text-underline-offset: 3px;
  transition: color var(--dur-fast) var(--ease), text-decoration-color var(--dur-fast) var(--ease);
}
.article-body a:hover {
  color: var(--ocre-steppe);
  text-decoration-color: var(--ocre-20);
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.5em;
  font-size: 0.9rem;
}
.article-body th {
  font-family: var(--ff-display);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.8rem;
  padding: 0.6rem 0.8rem;
  background: var(--acier);
  color: var(--ivoire);
  text-align: left;
}
.article-body td {
  padding: 0.6rem 0.8rem;
  border-bottom: 1px solid var(--charbon-10);
}
.article-body tr:nth-child(even) td { background: var(--creme-huile); }

/* ============================================================
   4. KICKERS (signature visuelle #1)
   ============================================================ */
.kicker {
  font-family: var(--ff-mono);
  font-size: 0.72rem;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.25em;
  color: var(--ocre-steppe);
  display: block;
  margin-bottom: 0.6rem;
}

/* ============================================================
   5. LAYOUT UTILITAIRES
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--measure-wide);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.container-article {
  width: 100%;
  max-width: var(--measure-article);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease);
}
.reveal.visible {
  opacity: 1;
  transform: none;
}

/* ============================================================
   6. HEADER
   ============================================================ */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: var(--z-nav);
  padding: var(--sp-2) 0;
  transition: background var(--dur) var(--ease), padding var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
  background: transparent;
}
.site-header.scrolled {
  background: var(--acier-80);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 0.75rem 0;
  box-shadow: 0 2px 16px rgba(0,0,0,0.25);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
}

/* Logo */
.site-logo {
  font-family: var(--ff-display);
  font-weight: 700;
  font-size: 1.4rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ivoire);
  line-height: 1;
  display: flex;
  flex-direction: column;
  gap: 0;
}
.site-logo span {
  display: block;
  font-size: 0.65rem;
  letter-spacing: 0.3em;
  color: var(--ocre-steppe);
  font-family: var(--ff-mono);
  font-weight: 400;
  text-transform: uppercase;
  margin-top: 2px;
}

/* Navigation principale */
.main-nav {
  display: flex;
  align-items: center;
  gap: var(--sp-1);
}

.nav-item {
  position: relative;
}

.nav-link {
  font-family: var(--ff-display);
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ivoire);
  padding: 0.4rem 0.7rem;
  border-radius: var(--radius-sm);
  transition: color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
  cursor: pointer;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 0.3rem;
}
.nav-link::after {
  content: '▾';
  font-size: 0.7rem;
  opacity: 0.7;
}
.nav-link.no-arrow::after { display: none; }
.nav-link:hover { color: var(--ocre-steppe); }

/* Dropdown */
.nav-dropdown {
  position: absolute;
  top: calc(100% + 0.5rem);
  left: 50%;
  transform: translateX(-50%);
  min-width: 220px;
  background: var(--acier);
  border: 1px solid rgba(154, 165, 180, 0.2);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 0.5rem 0;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease), visibility var(--dur-fast);
  transform: translateX(-50%) translateY(-6px);
  z-index: 200;
}
.nav-item:hover .nav-dropdown,
.nav-item:focus-within .nav-dropdown {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}
.nav-dropdown a {
  display: block;
  padding: 0.5rem 1.2rem;
  font-family: var(--ff-display);
  font-size: 0.82rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--chrome);
  transition: color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}
.nav-dropdown a:hover { color: var(--ocre-steppe); background: rgba(255,255,255,0.05); }

/* Langue switcher */
.lang-switch {
  font-family: var(--ff-mono);
  font-size: 0.72rem;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--chrome);
  border: 1px solid var(--charbon-40);
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-sm);
  transition: color var(--dur-fast), border-color var(--dur-fast);
}
.lang-switch:hover { color: var(--ocre-steppe); border-color: var(--ocre-steppe); }

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  padding: 4px;
  cursor: pointer;
}
.hamburger span {
  display: block;
  height: 2px;
  background: var(--ivoire);
  transition: transform var(--dur-fast) var(--ease), opacity var(--dur-fast);
}

@media (max-width: 900px) {
  .hamburger { display: flex; }
  .main-nav {
    position: fixed;
    inset: 0;
    background: var(--acier);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: var(--sp-2);
    transform: translateX(100%);
    transition: transform var(--dur) var(--ease);
    z-index: 150;
  }
  body.nav-open .main-nav { transform: none; }
  .nav-dropdown {
    position: static;
    transform: none;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    background: transparent;
    border: none;
    box-shadow: none;
    padding: 0;
    display: none;
  }
  .nav-item:hover .nav-dropdown { display: block; }
  .nav-link { font-size: 1.1rem; color: var(--ivoire); }
  .lang-switch { font-size: 0.85rem; }
}

/* ============================================================
   7. HERO
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: var(--acier);
}
.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  opacity: 0.8;
}

/* Grain film overlay (signature visuelle #5) */
.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.08'/%3E%3C/svg%3E");
  background-size: 200px;
  opacity: 0.08;
  mix-blend-mode: overlay;
  pointer-events: none;
}

/* Gradient charbon-bas (signature visuelle #5) */
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    transparent 20%,
    var(--charbon-40) 55%,
    var(--charbon-90) 100%
  );
}

/* Watermark numéro série (signature visuelle #2) */
.hero-watermark {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--ff-mono);
  font-size: clamp(4rem, 12vw, 10rem);
  font-weight: 400;
  color: var(--ivoire);
  opacity: 0.04;
  white-space: nowrap;
  pointer-events: none;
  user-select: none;
  letter-spacing: 0.1em;
}

.hero-content {
  position: relative;
  z-index: 2;
  padding: var(--sp-16) var(--gutter) var(--sp-12);
  width: 100%;
  max-width: var(--measure-wide);
  margin-inline: auto;
}

.hero-breadcrumb {
  font-family: var(--ff-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--chrome);
  margin-bottom: var(--sp-3);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.hero-breadcrumb a { color: var(--chrome); transition: color var(--dur-fast); }
.hero-breadcrumb a:hover { color: var(--ocre-steppe); }
.hero-breadcrumb span { opacity: 0.5; }

.hero-kicker {
  font-family: var(--ff-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.25em;
  color: var(--ocre-steppe);
  margin-bottom: var(--sp-2);
  display: block;
}

.hero-title {
  font-family: var(--ff-display);
  font-weight: 700;
  font-size: clamp(2.2rem, 6vw, 4.5rem);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  line-height: 1.05;
  color: var(--ivoire);
  max-width: 800px;
  margin-bottom: var(--sp-3);
}

.hero-lead {
  font-family: var(--ff-body);
  font-size: clamp(1rem, 1.8vw, 1.2rem);
  line-height: 1.65;
  color: var(--ivoire-75);
  max-width: 600px;
  margin-bottom: var(--sp-4);
}

.hero-meta {
  font-family: var(--ff-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--chrome);
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  flex-wrap: wrap;
}

/* Scroll indicator */
.hero-scroll {
  position: absolute;
  bottom: var(--sp-4);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  color: var(--chrome);
  font-family: var(--ff-mono);
  font-size: 0.6rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  animation: pulse 2s ease infinite;
}
.hero-scroll::after {
  content: '';
  display: block;
  width: 1px;
  height: 32px;
  background: linear-gradient(to bottom, var(--chrome), transparent);
}
@keyframes pulse {
  0%, 100% { opacity: 0.7; transform: translateX(-50%) translateY(0); }
  50%       { opacity: 1;   transform: translateX(-50%) translateY(4px); }
}

/* Hero page d'article (min-height réduite) */
.hero-article {
  min-height: 65vh;
}
.hero-article .hero-title {
  font-size: clamp(1.8rem, 4vw, 3.2rem);
}

/* ============================================================
   8. BADGES TECHNIQUES (signature visuelle #4)
   ============================================================ */
.badge-tech {
  display: inline-block;
  font-family: var(--ff-mono);
  font-size: 0.68rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--chrome);
  background: var(--charbon-06);
  border: 1px solid var(--charbon-10);
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

/* ============================================================
   9. ARTICLE LAYOUT (page pilier + blog)
   ============================================================ */
.page-wrapper {
  display: grid;
  grid-template-columns: 1fr min(var(--measure-article), 100%) 1fr;
  column-gap: 0;
}
.page-wrapper > * { grid-column: 2; }
.page-wrapper > .full-bleed { grid-column: 1 / -1; }

.article-wrap {
  max-width: var(--measure-wide);
  margin-inline: auto;
  padding-inline: var(--gutter);
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: var(--sp-8);
  align-items: start;
  padding-top: var(--sp-8);
  padding-bottom: var(--sp-12);
}
@media (max-width: 1100px) {
  .article-wrap { grid-template-columns: 1fr; }
  .article-toc { display: none; }
}

.article-body {
  min-width: 0;
  max-width: var(--measure-article);
}

/* Résumé chapeau */
.article-summary {
  font-style: italic;
  font-size: 1.1rem;
  line-height: 1.7;
  color: var(--acier);
  border-left: 3px solid var(--rouille);
  padding-left: var(--sp-3);
  margin-bottom: var(--sp-6);
}

/* Lettrine premier paragraphe (signature visuelle #8) */
.article-body > p:first-of-type::first-letter {
  font-family: var(--ff-display);
  font-weight: 700;
  font-size: 4rem;
  line-height: 0.8;
  float: left;
  margin-right: 0.08em;
  margin-top: 0.06em;
  color: var(--rouille);
  text-transform: uppercase;
}

/* Pull quotes (signature visuelle #6) */
.pull-quote {
  border-left: 4px solid var(--rouille);
  padding: var(--sp-3) var(--sp-4);
  margin: var(--sp-6) 0;
  background: var(--creme-huile);
}
.pull-quote p {
  font-family: var(--ff-mono);
  font-style: italic;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--acier);
  margin: 0;
}
.pull-quote cite {
  display: block;
  margin-top: var(--sp-1);
  font-family: var(--ff-mono);
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--ocre-steppe);
  font-style: normal;
}

/* Images dans le corps */
.article-body img {
  width: 100%;
  height: auto;
  margin: var(--sp-6) 0;
  border-radius: var(--radius-md);
}
.article-body figure {
  margin: var(--sp-6) 0;
}
.article-body figcaption {
  font-family: var(--ff-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--chrome);
  margin-top: var(--sp-1);
  text-align: center;
}

/* ============================================================
   10. TABLE DES MATIÈRES (TOC sticky — signature visuelle #9)
   ============================================================ */
.article-toc {
  position: sticky;
  top: 100px;
  max-height: calc(100vh - 120px);
  overflow-y: auto;
  padding: var(--sp-3);
  background: var(--creme-huile);
  border: 1px solid var(--charbon-10);
  border-radius: var(--radius-md);
}
.article-toc h4 {
  font-family: var(--ff-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.25em;
  color: var(--chrome);
  margin-bottom: var(--sp-2);
  font-weight: 400;
}
.toc-list { counter-reset: toc-counter; }
.toc-list li {
  counter-increment: toc-counter;
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  margin-bottom: var(--sp-1);
}
.toc-list li::before {
  content: counter(toc-counter, decimal-leading-zero) ".";
  font-family: var(--ff-mono);
  font-size: 0.65rem;
  color: var(--ocre-steppe);
  white-space: nowrap;
  flex-shrink: 0;
}
.toc-list a {
  font-family: var(--ff-body);
  font-size: 0.82rem;
  color: var(--charbon-65);
  line-height: 1.4;
  transition: color var(--dur-fast);
}
.toc-list a:hover { color: var(--rouille); }

/* ============================================================
   11. FAQ ACCORDION (signature visuelle #10)
   ============================================================ */
.faq-section {
  margin-top: var(--sp-8);
  padding-top: var(--sp-6);
  border-top: 1px solid var(--charbon-10);
}
.faq-section h2 {
  margin-bottom: var(--sp-4);
}

.faq-list { display: flex; flex-direction: column; gap: 1px; }

.faq-item {
  border: 1px solid var(--charbon-10);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--ivoire);
  transition: border-color var(--dur-fast);
}
.faq-item.open { border-color: var(--rouille-20); }

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-3);
  cursor: pointer;
  font-family: var(--ff-body);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--acier);
  line-height: 1.4;
  user-select: none;
  transition: color var(--dur-fast);
}
.faq-item.open .faq-question { color: var(--rouille); }

/* Bouton [+]/[×] style industriel */
.faq-toggle {
  font-family: var(--ff-mono);
  font-size: 0.9rem;
  color: var(--chrome);
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  border: 1px solid var(--charbon-20);
  border-radius: 2px;
  transition: color var(--dur-fast), border-color var(--dur-fast), transform var(--dur-fast);
}
.faq-item.open .faq-toggle {
  color: var(--rouille);
  border-color: var(--rouille-20);
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--dur) var(--ease);
}
.faq-item.open .faq-answer { max-height: 600px; }

.faq-answer-inner {
  padding: 0 var(--sp-3) var(--sp-3);
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--charbon-80);
}
.faq-answer-inner p { margin-bottom: 0.8em; }
.faq-answer-inner p:last-child { margin-bottom: 0; }

/* ============================================================
   12. CARDS GRILLE (coin coupé — signature visuelle #7)
   ============================================================ */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--sp-3);
}

.card {
  display: flex;
  flex-direction: column;
  background: var(--creme-huile);
  border: 1px solid var(--charbon-10);
  /* Coin coupé haut-droit */
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
  overflow: hidden;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card-image {
  aspect-ratio: 3 / 2;
  overflow: hidden;
}
.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--dur-slow) var(--ease);
}
.card:hover .card-image img { transform: scale(1.04); }

.card-body {
  padding: var(--sp-3);
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
}

.card-kicker {
  font-family: var(--ff-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--ocre-steppe);
}

.card-title {
  font-family: var(--ff-display);
  font-weight: 700;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  line-height: 1.25;
  color: var(--acier);
  transition: color var(--dur-fast);
}
.card:hover .card-title { color: var(--rouille); }

.card-excerpt {
  font-size: 0.85rem;
  line-height: 1.55;
  color: var(--charbon-65);
  margin-top: auto;
}

.card-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: var(--sp-1);
}

/* ============================================================
   13. BOUTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--ff-display);
  font-weight: 700;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  padding: 0.65rem 1.5rem;
  border-radius: var(--radius-sm);
  transition: background var(--dur-fast), color var(--dur-fast), transform var(--dur-fast);
  cursor: pointer;
}
.btn-primary {
  background: var(--rouille);
  color: var(--ivoire);
}
.btn-primary:hover { background: #A04830; transform: translateY(-2px); }
.btn-outline {
  background: transparent;
  color: var(--ivoire);
  border: 1px solid var(--ivoire-40);
}
.btn-outline:hover { background: var(--ivoire-40); transform: translateY(-2px); }
.btn-ocre {
  background: var(--ocre-steppe);
  color: var(--charbon);
}
.btn-ocre:hover { background: #D4973A; transform: translateY(-2px); }

/* ============================================================
   14. HOMEPAGE SECTIONS
   ============================================================ */
.section {
  padding: var(--sp-12) 0;
}
.section-dark {
  background: var(--acier);
  color: var(--ivoire);
}
.section-cream { background: var(--creme-huile); }
.section-title {
  font-size: clamp(1.6rem, 4vw, 2.5rem);
  margin-bottom: var(--sp-1);
  color: inherit;
}
.section-lead {
  font-size: 1rem;
  line-height: 1.65;
  color: var(--charbon-65);
  max-width: 560px;
  margin-bottom: var(--sp-6);
}
.section-dark .section-lead { color: var(--chrome); }

/* Section immersive */
.section-immersive {
  position: relative;
  min-height: 500px;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.section-immersive-bg {
  position: absolute;
  inset: 0;
}
.section-immersive-bg img { width: 100%; height: 100%; object-fit: cover; opacity: 0.5; }
.section-immersive-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--charbon-90) 0%, var(--acier-80) 100%);
}
.section-immersive-content {
  position: relative;
  z-index: 2;
  padding: var(--sp-12) var(--gutter);
  max-width: var(--measure-wide);
  margin-inline: auto;
  width: 100%;
}
.section-immersive-content .section-title { color: var(--ivoire); }
.section-immersive-content p { color: var(--ivoire-75); max-width: 520px; }

/* ============================================================
   15. BLOG LISTING
   ============================================================ */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--sp-4);
}

.blog-card {
  display: flex;
  flex-direction: column;
  border-bottom: 2px solid var(--charbon-10);
  transition: border-color var(--dur-fast);
}
.blog-card:hover { border-color: var(--rouille); }

.blog-card-image {
  aspect-ratio: 3 / 2;
  overflow: hidden;
  margin-bottom: var(--sp-2);
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
}
.blog-card-image img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--dur-slow) var(--ease); }
.blog-card:hover .blog-card-image img { transform: scale(1.04); }

.blog-card-meta {
  font-family: var(--ff-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--ocre-steppe);
  margin-bottom: 0.4rem;
}

.blog-card-title {
  font-family: var(--ff-display);
  font-weight: 700;
  font-size: 1.1rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  line-height: 1.2;
  color: var(--acier);
  margin-bottom: 0.5rem;
  transition: color var(--dur-fast);
}
.blog-card:hover .blog-card-title { color: var(--rouille); }

.blog-card-excerpt {
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--charbon-65);
  flex: 1;
}

/* ============================================================
   16. RELATED ARTICLES
   ============================================================ */
.related-section {
  margin-top: var(--sp-8);
  padding-top: var(--sp-6);
  border-top: 1px solid var(--charbon-10);
}
.related-section h3 {
  font-family: var(--ff-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.25em;
  color: var(--chrome);
  font-weight: 400;
  margin-bottom: var(--sp-3);
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--sp-2);
}
.related-card {
  display: block;
  font-family: var(--ff-display);
  font-size: 0.88rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--acier);
  padding: var(--sp-2);
  border: 1px solid var(--charbon-10);
  border-radius: var(--radius-sm);
  transition: border-color var(--dur-fast), color var(--dur-fast), background var(--dur-fast);
  line-height: 1.35;
}
.related-card:hover { border-color: var(--rouille); color: var(--rouille); background: var(--rouille-10); }

/* ============================================================
   17. FOOTER
   ============================================================ */
.site-footer {
  background: var(--charbon);
  color: var(--chrome);
  padding: var(--sp-12) 0 var(--sp-6);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--sp-6);
  margin-bottom: var(--sp-8);
}
@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--sp-4); }
}
@media (max-width: 520px) {
  .footer-grid { grid-template-columns: 1fr; }
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}
.footer-logo {
  font-family: var(--ff-display);
  font-weight: 700;
  font-size: 1.6rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ivoire);
}
.footer-tagline {
  font-family: var(--ff-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--ocre-steppe);
}
.footer-desc {
  font-size: 0.82rem;
  line-height: 1.65;
  color: var(--chrome);
}

.footer-col h4 {
  font-family: var(--ff-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.25em;
  color: var(--ocre-steppe);
  font-weight: 400;
  margin-bottom: var(--sp-2);
}
.footer-col ul { display: flex; flex-direction: column; gap: 0.5rem; }
.footer-col a {
  font-size: 0.85rem;
  color: var(--chrome);
  transition: color var(--dur-fast);
}
.footer-col a:hover { color: var(--ivoire); }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--sp-2);
  padding-top: var(--sp-4);
  border-top: 1px solid rgba(154,165,180,0.15);
  font-family: var(--ff-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: rgba(154,165,180,0.5);
}

/* ============================================================
   18. PAGES UTILITAIRES (contact, mentions, cgu, plan du site)
   ============================================================ */
.util-page {
  padding-top: 100px;
  min-height: 80vh;
}
.util-page-inner {
  max-width: var(--measure-article);
  margin-inline: auto;
  padding: var(--sp-8) var(--gutter) var(--sp-12);
}
.util-page-inner h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  margin-bottom: var(--sp-4);
}
.util-page-inner h2 {
  font-size: 1.3rem;
  margin-top: var(--sp-6);
  margin-bottom: var(--sp-2);
}
.util-page-inner p { margin-bottom: 1em; font-size: 0.95rem; }
.util-page-inner ul { list-style: disc; padding-left: 1.5rem; }
.util-page-inner li { margin-bottom: 0.4em; font-size: 0.95rem; }

.contact-email-box {
  background: var(--creme-huile);
  border: 1px solid var(--charbon-10);
  border-left: 3px solid var(--rouille);
  padding: var(--sp-4);
  border-radius: var(--radius-md);
  margin: var(--sp-4) 0;
}
.contact-email-box p { margin-bottom: 0.5em; }
.contact-email-box p:last-child { margin-bottom: 0; }

/* ============================================================
   19. PAGE 404
   ============================================================ */
.page-404 {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--acier);
  color: var(--ivoire);
  text-align: center;
  padding: var(--gutter);
}
.page-404-inner h1 {
  font-size: clamp(6rem, 20vw, 12rem);
  color: var(--ocre-steppe);
  line-height: 1;
  margin-bottom: var(--sp-2);
}
.page-404-inner h2 { color: var(--ivoire); margin-bottom: var(--sp-3); }
.page-404-inner p { color: var(--chrome); margin-bottom: var(--sp-4); }

/* ============================================================
   20. PLAN DU SITE
   ============================================================ */
.sitemap-section { margin-bottom: var(--sp-6); }
.sitemap-section h2 {
  font-size: 1.1rem;
  margin-bottom: var(--sp-2);
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--charbon-10);
}
.sitemap-list { display: flex; flex-direction: column; gap: 0.3rem; }
.sitemap-list a {
  font-size: 0.9rem;
  color: var(--rouille);
  text-decoration: underline;
  text-decoration-color: var(--rouille-20);
}
.sitemap-list a:hover { color: var(--ocre-steppe); }

/* ============================================================
   21. LANGUE SWITCHER PAGE (indicateur FR/EN dans le contenu)
   ============================================================ */
.lang-bar {
  background: var(--creme-huile);
  border-bottom: 1px solid var(--charbon-10);
  padding: 0.5rem var(--gutter);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--sp-2);
  font-family: var(--ff-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
}
.lang-bar a {
  color: var(--chrome);
  padding: 0.2rem 0.5rem;
  border-radius: 2px;
  transition: color var(--dur-fast), background var(--dur-fast);
}
.lang-bar a:hover { color: var(--acier); background: var(--charbon-10); }
.lang-bar a.active { color: var(--rouille); font-weight: 600; }

/* ============================================================
   22. BREADCRUMB ARTICLE
   ============================================================ */
.breadcrumb-bar {
  background: var(--creme-huile);
  padding: 0.6rem var(--gutter);
  border-bottom: 1px solid var(--charbon-10);
}
.breadcrumb-inner {
  max-width: var(--measure-wide);
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--ff-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--chrome);
  flex-wrap: wrap;
}
.breadcrumb-inner a { color: var(--chrome); transition: color var(--dur-fast); }
.breadcrumb-inner a:hover { color: var(--rouille); }
.breadcrumb-inner .sep { opacity: 0.4; }
.breadcrumb-inner .current { color: var(--charbon-65); }

/* ============================================================
   23. INTERVIEW FORMAT (articles 4 et 9)
   ============================================================ */
.interview-intro {
  background: var(--creme-huile);
  border: 1px solid var(--charbon-10);
  border-radius: var(--radius-md);
  padding: var(--sp-4);
  margin-bottom: var(--sp-6);
}
.interview-intro .kicker { margin-bottom: var(--sp-1); }
.interview-expert-name {
  font-family: var(--ff-display);
  font-size: 1.3rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--acier);
  margin-bottom: 0.25rem;
}
.interview-expert-bio {
  font-family: var(--ff-mono);
  font-size: 0.72rem;
  color: var(--chrome);
  letter-spacing: 0.08em;
}

.qa-block { margin-bottom: var(--sp-4); }
.qa-question {
  font-family: var(--ff-display);
  font-weight: 700;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--rouille);
  margin-bottom: var(--sp-1);
  padding-left: 0.8rem;
  border-left: 3px solid var(--rouille);
}
.qa-answer { font-size: 0.95rem; line-height: 1.75; }

/* ============================================================
   24. RESPONSIVE GLOBAL
   ============================================================ */
@media (max-width: 700px) {
  .cards-grid { grid-template-columns: 1fr; }
  .blog-grid  { grid-template-columns: 1fr; }
  .hero-content { padding: var(--sp-12) var(--gutter) var(--sp-8); }
  .article-wrap { padding-top: var(--sp-4); padding-bottom: var(--sp-8); }
  .section { padding: var(--sp-8) 0; }
  h1 { font-size: clamp(1.8rem, 8vw, 2.5rem); }
}