/* ============================================================
   Cellules & avenir — Thème Joornal
   Style : Magazine scientifique éditorial
   Framework : CSS Grid + Flexbox pur
   ============================================================ */

/* ---------- Google Fonts ---------- */
@import url('https://fonts.googleapis.com/css2?family=Merriweather:ital,wght@0,300;0,400;0,700;0,900;1,300;1,400&family=Inter:wght@300;400;500;600;700&display=swap');

/* ---------- Variables CSS ---------- */
:root {
  --color-primary:   #1a3a5c;
  --color-secondary: #e8f4f8;
  --color-accent:    #2a9d8f;
  --color-accent-dark: #1f7a6e;
  --color-text:      #1c1c2e;
  --color-text-light:#4a4a6a;
  --color-border:    #d0e4ed;
  --color-bg:        #f7f9fb;
  --color-white:     #ffffff;
  --color-nav-bg:    #0f2640;

  --font-title: 'Merriweather', Georgia, serif;
  --font-body:  'Inter', system-ui, sans-serif;

  --radius-sm: 3px;
  --radius-md: 6px;
  --radius-lg: 12px;

  --shadow-card: 0 2px 12px rgba(26,58,92,0.08);
  --shadow-hover: 0 6px 24px rgba(26,58,92,0.14);

  --max-w: 1280px;
  --gap-section: 64px;
}

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

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

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-accent); text-decoration: none; transition: color .2s; }
a:hover { color: var(--color-accent-dark); }
ul { list-style: none; }

/* ---------- Conteneurs ---------- */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: 24px;
}
.container--narrow {
  max-width: 840px;
  margin-inline: auto;
  padding-inline: 24px;
}

/* ============================================================
   NAVIGATION
   ============================================================ */
.site-nav {
  background: var(--color-nav-bg);
  border-bottom: 3px solid var(--color-accent);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 16px rgba(0,0,0,0.18);
}

.nav-inner {
  display: flex;
  align-items: center;
  gap: 32px;
  padding-block: 14px;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: 24px;
}

.nav-logo a {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.nav-logo img {
  height: 72px;
  width: auto;
  display: block;
}

/* ---------- Menu principal ---------- */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
  flex: 1;
}

.nav-menu li {
  position: relative;
}

.nav-menu a {
  display: block;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.875rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.85);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  transition: background .2s, color .2s;
}

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

/* Mobile burger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  margin-left: auto;
  padding: 8px;
  background: none;
  border: none;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-white);
  border-radius: 2px;
  transition: transform .3s, opacity .3s;
}

/* CSS-only mobile menu */
#nav-check { display: none; }

@media (max-width: 768px) {
  .nav-toggle { display: flex; }

  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-nav-bg);
    flex-direction: column;
    align-items: flex-start;
    padding: 12px 24px 20px;
    gap: 2px;
    border-top: 1px solid rgba(255,255,255,0.1);
    box-shadow: 0 8px 24px rgba(0,0,0,0.2);
  }

  #nav-check:checked ~ .nav-inner .nav-menu {
    display: flex;
  }

  .nav-menu a {
    width: 100%;
    padding: 10px 12px;
  }

  .nav-logo img {
    height: 52px;
  }
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  background: var(--color-nav-bg);
  color: rgba(255,255,255,0.6);
  padding-block: 36px;
  margin-top: var(--gap-section);
  border-top: 3px solid var(--color-accent);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 16px;
}

.footer-brand img {
  height: 48px;
  width: auto;
  opacity: 0.85;
}

.footer-copy {
  font-size: 0.8rem;
  line-height: 1.5;
}

.footer-copy strong {
  color: rgba(255,255,255,0.9);
  font-weight: 600;
}

.footer-meta {
  font-size: 0.78rem;
  text-align: right;
}

@media (max-width: 600px) {
  .footer-inner { flex-direction: column; align-items: flex-start; }
  .footer-meta { text-align: left; }
}

/* ============================================================
   INDEX — LAYOUT SIDEBAR (Archétype F)
   ============================================================ */
.index-hero {
  padding-block: 56px 40px;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
}

.index-hero-grid {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 48px;
  align-items: start;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: 24px;
}

/* Colonne principale */
.index-main {}

.index-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 20px;
}

.index-label::before {
  content: '';
  display: block;
  width: 32px;
  height: 2px;
  background: var(--color-accent);
}

.index-h1 {
  font-family: var(--font-title);
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 900;
  line-height: 1.15;
  color: var(--color-primary);
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}

.index-content {
  font-size: 1.05rem;
  color: var(--color-text-light);
  line-height: 1.8;
  max-width: 680px;
}

.index-content p + p { margin-top: 1em; }

/* Sidebar */
.index-sidebar {
  position: sticky;
  top: 108px;
}

.sidebar-card {
  background: var(--color-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.sidebar-thumb {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  display: block;
}

.sidebar-thumb-wrap img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  display: block;
}

.sidebar-info {
  padding: 20px;
}

.sidebar-baseline {
  font-family: var(--font-title);
  font-size: 0.95rem;
  font-style: italic;
  font-weight: 300;
  color: var(--color-primary);
  line-height: 1.5;
  margin-bottom: 16px;
  border-left: 3px solid var(--color-accent);
  padding-left: 12px;
}

.sidebar-date {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-light);
}

.sidebar-divider {
  width: 32px;
  height: 2px;
  background: var(--color-accent);
  margin-block: 12px;
}

.sidebar-domain {
  font-size: 0.78rem;
  color: var(--color-accent);
  font-weight: 600;
}

/* Showcase section */
.index-showcase {
  padding-block: var(--gap-section);
}

.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 36px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--color-primary);
}

.section-title {
  font-family: var(--font-title);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.01em;
}

.section-link {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.post-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

@media (max-width: 768px) {
  .index-hero-grid {
    grid-template-columns: 1fr;
  }
  .index-sidebar {
    position: static;
    order: -1;
  }
  .sidebar-card {
    display: grid;
    grid-template-columns: 160px 1fr;
  }
  .sidebar-thumb-wrap {
    aspect-ratio: unset;
  }
  .sidebar-thumb-wrap img {
    height: 100%;
    aspect-ratio: unset;
  }
  .post-grid {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 600px) and (max-width: 991px) {
  .post-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ============================================================
   POST-LOOP — Carte article
   ============================================================ */
.post-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform .25s, box-shadow .25s;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--color-border);
}

.post-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.post-card__thumb {
  aspect-ratio: 16/9;
  overflow: hidden;
}

.post-card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}

.post-card:hover .post-card__thumb img {
  transform: scale(1.04);
}

.post-card__body {
  padding: 20px 22px 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.post-card__meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.post-card__cat {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-white);
  background: var(--color-accent);
  padding: 3px 9px;
  border-radius: 2px;
}

.post-card__date {
  font-size: 0.75rem;
  color: var(--color-text-light);
  font-weight: 400;
}

.post-card__title {
  font-family: var(--font-title);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--color-primary);
  margin-bottom: 10px;
  flex: 1;
}

.post-card__title a {
  color: inherit;
}

.post-card__title a:hover {
  color: var(--color-accent);
}

.post-card__excerpt {
  font-size: 0.875rem;
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-card__read {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-top: auto;
  transition: gap .2s;
}

.post-card__read::after {
  content: '→';
}

.post-card:hover .post-card__read {
  gap: 10px;
}

/* ============================================================
   POST-LIST — Page listing
   ============================================================ */
.list-header {
  background: var(--color-primary);
  padding-block: 52px 44px;
  position: relative;
  overflow: hidden;
}

.list-header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-accent), transparent);
}

.list-header__breadcrumb {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.5);
  margin-bottom: 16px;
}

.list-header__breadcrumb a {
  color: rgba(255,255,255,0.6);
}

.list-header__breadcrumb a:hover {
  color: var(--color-accent);
}

.list-header__title {
  font-family: var(--font-title);
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 900;
  color: var(--color-white);
  letter-spacing: -0.02em;
}

.list-header__accent {
  display: block;
  width: 48px;
  height: 3px;
  background: var(--color-accent);
  margin-top: 16px;
}

.list-body {
  padding-block: 56px;
}

.list-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 52px;
}

@media (max-width: 991px) {
  .list-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 580px) {
  .list-grid { grid-template-columns: 1fr; }
}

/* Pagination */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  flex-wrap: wrap;
}

.pagination .page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 38px;
  height: 38px;
  padding-inline: 10px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-primary);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  transition: background .2s, color .2s, border-color .2s;
}

.pagination .page:hover {
  background: var(--color-secondary);
  border-color: var(--color-accent);
}

.pagination .page.active {
  background: var(--color-accent);
  color: var(--color-white);
  border-color: var(--color-accent);
  font-weight: 700;
}

/* ============================================================
   POST.HTML — Article complet
   ============================================================ */
.post-header {
  background: var(--color-primary);
  padding-block: 48px 40px;
  position: relative;
}

.post-header::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--color-accent);
}

.post-header__breadcrumb {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.5);
  margin-bottom: 20px;
}

.post-header__breadcrumb a {
  color: rgba(255,255,255,0.6);
}

.post-header__breadcrumb a:hover {
  color: var(--color-accent);
}

.post-header__cat {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-white);
  background: var(--color-accent);
  padding: 4px 12px;
  border-radius: 2px;
  margin-bottom: 16px;
}

.post-header__title {
  font-family: var(--font-title);
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 900;
  color: var(--color-white);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
  max-width: 820px;
}

.post-header__meta {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.post-header__date,
.post-header__reading {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.55);
  font-weight: 400;
}

.post-header__date::before { content: '📅 '; }
.post-header__reading::before { content: '⏱ '; }

/* Post body */
.post-body {
  padding-block: 52px;
}

.post-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 56px;
  align-items: start;
}

.post-main {}

.post-thumb {
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 36px;
  box-shadow: 0 4px 20px rgba(26,58,92,0.12);
}

.post-thumb img {
  width: 100%;
  max-height: 480px;
  object-fit: cover;
}

/* Contenu article */
.post-content {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--color-text);
}

.post-content h2 {
  font-family: var(--font-title);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-top: 2.2em;
  margin-bottom: 0.7em;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-border);
}

.post-content h3 {
  font-family: var(--font-title);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-top: 1.8em;
  margin-bottom: 0.5em;
}

.post-content h4 {
  font-family: var(--font-title);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-top: 1.4em;
  margin-bottom: 0.4em;
}

.post-content p { margin-bottom: 1.2em; }

.post-content a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.post-content ul, .post-content ol {
  margin-bottom: 1.2em;
  padding-left: 1.6em;
  list-style: revert;
}

.post-content li { margin-bottom: 0.4em; }

.post-content blockquote {
  border-left: 4px solid var(--color-accent);
  background: var(--color-secondary);
  padding: 16px 20px;
  margin-block: 1.5em;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-style: italic;
  color: var(--color-primary);
}

.post-content img {
  border-radius: var(--radius-md);
  margin-block: 1.5em;
  box-shadow: 0 2px 12px rgba(26,58,92,0.08);
}

.post-content code {
  background: var(--color-secondary);
  border: 1px solid var(--color-border);
  padding: 2px 6px;
  border-radius: 3px;
  font-size: 0.9em;
}

.post-content pre {
  background: var(--color-primary);
  color: var(--color-white);
  padding: 20px;
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin-block: 1.5em;
}

/* Table des matières */
.post-toc {
  background: var(--color-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  margin-bottom: 36px;
}

.post-toc__title {
  font-family: var(--font-title);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 12px;
}

/* Signatory */
.post-signatory {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 2px solid var(--color-border);
}

.post-signatory__label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-light);
  margin-bottom: 12px;
}

/* Articles liés */
.related-section {
  padding-block: 48px;
  background: var(--color-secondary);
  border-top: 1px solid var(--color-border);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 28px;
}

/* Post sidebar */
.post-aside {}

.aside-widget {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 22px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-card);
}

.aside-widget__title {
  font-family: var(--font-title);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--color-accent);
  letter-spacing: 0.02em;
}

.toc-list {
  font-size: 0.85rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

@media (max-width: 900px) {
  .post-layout {
    grid-template-columns: 1fr;
  }
  .post-aside {
    order: -1;
  }
  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 560px) {
  .related-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================================
   Breadcrumb global
   ============================================================ */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.breadcrumb a { color: inherit; }
.breadcrumb a:hover { color: var(--color-accent); }

.breadcrumb__sep {
  opacity: 0.4;
  font-size: 0.9em;
}

/* ============================================================
   Utilitaires
   ============================================================ */
.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0);
  white-space: nowrap; border: 0;
}

.accent-line {
  display: block;
  width: 40px;
  height: 3px;
  background: var(--color-accent);
  margin-bottom: 28px;
}