/* ============================================================
   SEEVAD — Thème Magazine Scientifique Éthologie
   CSS Grid + Flexbox pur | Palette naturelle & chaleureuse
   ============================================================ */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Lora:ital,wght@0,400;0,500;0,600;0,700;1,400;1,500&family=Source+Sans+3:wght@300;400;600;700&display=swap');

/* --- Variables CSS --- */
:root {
  --primary:    #1B3A4B;
  --secondary:  #F4F1EB;
  --accent:     #C97B3A;
  --accent-light: #E8A96A;
  --text:       #2C2C2C;
  --text-muted: #6B6B6B;
  --white:      #FFFFFF;
  --border:     #DDD8CF;
  --surface:    #FDFBF7;

  --font-title: 'Lora', Georgia, serif;
  --font-body:  'Source Sans 3', 'Helvetica Neue', Arial, sans-serif;

  --radius:     4px;
  --radius-md:  8px;
  --shadow-sm:  0 1px 4px rgba(27,58,75,.08);
  --shadow-md:  0 4px 16px rgba(27,58,75,.12);

  --max-w:      1280px;
  --content-w:  860px;
}

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.7;
  color: var(--text);
  background: var(--surface);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ============================================================
   NAV
   ============================================================ */
.site-nav {
  background: var(--primary);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 12px rgba(0,0,0,.18);
}
.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  gap: 2.5rem;
  min-height: 88px;
}
.nav-logo { flex-shrink: 0; }
.nav-logo img {
  height: 72px;
  width: auto;
  display: block;
}

/* Menu principal */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 0;
  list-style: none;
  flex: 1;
}
.nav-menu li { position: relative; }
.nav-menu a {
  display: block;
  padding: .5rem 1rem;
  font-family: var(--font-body);
  font-size: .875rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: rgba(255,255,255,.82);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color .2s, border-color .2s;
}
.nav-menu a:hover {
  color: var(--accent-light);
  border-bottom-color: var(--accent);
  text-decoration: none;
}

/* Hamburger mobile */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  margin-left: auto;
  background: none;
  border: none;
  padding: .5rem;
}
.nav-toggle span {
  display: block;
  width: 26px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: transform .3s, opacity .3s;
}

/* ============================================================
   LAYOUT HELPERS
   ============================================================ */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
}
.container--narrow {
  max-width: var(--content-w);
  margin: 0 auto;
  padding: 0 2rem;
}

/* ============================================================
   INDEX — ARCHETYPE B : Magazine éditorial pleine largeur
   ============================================================ */

/* Label h1 éditorial */
.index-label {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 1.5rem 2rem .75rem;
}
.index-label h1 {
  font-family: var(--font-body);
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--accent);
  border-left: 3px solid var(--accent);
  padding-left: .75rem;
  text-align: left;
}

/* Bannière thumbnail pleine largeur */
.index-banner {
  width: 100%;
  max-height: 520px;
  overflow: hidden;
  position: relative;
}
.index-banner img,
.index-banner .thumb-img {
  width: 100%;
  height: 520px;
  object-fit: cover;
  display: block;
}

/* Section contenu de présentation */
.index-intro {
  background: var(--secondary);
  padding: 3.5rem 0;
  border-bottom: 1px solid var(--border);
}
.index-intro-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
}
.index-intro-inner .baseline {
  font-family: var(--font-title);
  font-size: 1.6rem;
  font-style: italic;
  color: var(--primary);
  margin-bottom: 1.25rem;
  line-height: 1.45;
}
.index-intro-inner .content-body {
  font-size: 1.05rem;
  color: var(--text);
  max-width: 900px;
  line-height: 1.75;
  columns: 2;
  column-gap: 3rem;
}

/* Showcase section */
.index-showcase {
  padding: 4rem 0 5rem;
}
.index-showcase-header {
  max-width: var(--max-w);
  margin: 0 auto 2.5rem;
  padding: 0 2rem;
  display: flex;
  align-items: baseline;
  gap: 1.5rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 1rem;
}
.index-showcase-header h2 {
  font-family: var(--font-title);
  font-size: 1.35rem;
  color: var(--primary);
  font-weight: 600;
}
.index-showcase-header span {
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--text-muted);
}

/* Grille d'articles showcase — 3 colonnes */
.showcase-grid {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

/* ============================================================
   POST-LOOP — Carte article
   ============================================================ */
.post-card {
  background: var(--white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow .25s, transform .25s;
  border: 1px solid var(--border);
}
.post-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}
.post-card__img {
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--border);
}
.post-card__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s;
}
.post-card:hover .post-card__img img { transform: scale(1.04); }
.post-card__body {
  padding: 1.25rem 1.4rem 1.6rem;
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: .6rem;
}
.post-card__cat {
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--accent);
  text-decoration: none;
}
.post-card__cat:hover { text-decoration: underline; }
.post-card__title {
  font-family: var(--font-title);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--primary);
  line-height: 1.4;
  margin: .1rem 0;
  text-decoration: none;
  display: block;
}
.post-card__title:hover { color: var(--accent); text-decoration: none; }
.post-card__meta {
  font-size: .8rem;
  color: var(--text-muted);
}
.post-card__excerpt {
  font-size: .92rem;
  color: var(--text-muted);
  line-height: 1.6;
  flex: 1;
}
.post-card__more {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  font-size: .82rem;
  font-weight: 700;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--accent);
  text-decoration: none;
  margin-top: .4rem;
}
.post-card__more::after { content: '→'; }
.post-card__more:hover { text-decoration: underline; }

/* ============================================================
   POST-LIST
   ============================================================ */
.postlist-hero {
  background: var(--primary);
  padding: 3.5rem 2rem 3rem;
}
.postlist-hero__inner {
  max-width: var(--max-w);
  margin: 0 auto;
}
.postlist-hero__label {
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--accent-light);
  margin-bottom: .75rem;
}
.postlist-hero__title {
  font-family: var(--font-title);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  color: var(--white);
  font-weight: 700;
  line-height: 1.25;
  text-align: left;
  max-width: 700px;
}
.postlist-hero__crumb {
  margin-top: 1rem;
}
.postlist-hero__crumb a,
.postlist-hero__crumb span {
  font-size: .82rem;
  color: rgba(255,255,255,.6);
}
.postlist-hero__crumb a:hover { color: var(--accent-light); }

/* Grille listing */
.postlist-section {
  padding: 3.5rem 0 5rem;
}
.postlist-grid {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

/* Pagination */
.pagination {
  max-width: var(--max-w);
  margin: 2.5rem auto 0;
  padding: 0 2rem;
  display: flex;
  justify-content: center;
  gap: .5rem;
  flex-wrap: wrap;
}
.pagination .page,
.pagination a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  font-family: var(--font-body);
  font-size: .88rem;
  font-weight: 600;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  text-decoration: none;
  background: var(--white);
  transition: all .2s;
}
.pagination a:hover { background: var(--primary); color: var(--white); border-color: var(--primary); }
.pagination .active {
  background: var(--accent);
  color: var(--white);
  border-color: var(--accent);
}

/* ============================================================
   POST.HTML — Article complet
   ============================================================ */
.post-hero {
  background: var(--secondary);
  border-bottom: 3px solid var(--accent);
  padding: 3rem 2rem 2.5rem;
}
.post-hero__inner {
  max-width: var(--content-w);
  margin: 0 auto;
}
.post-hero__crumb {
  font-size: .8rem;
  color: var(--text-muted);
  margin-bottom: 1.2rem;
}
.post-hero__crumb a { color: var(--accent); }
.post-hero__cat {
  display: inline-block;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--white);
  background: var(--accent);
  padding: .25rem .75rem;
  border-radius: 2px;
  margin-bottom: 1rem;
  text-decoration: none;
}
.post-hero__cat:hover { background: var(--primary); text-decoration: none; }
.post-hero__title {
  font-family: var(--font-title);
  font-size: clamp(1.6rem, 3.5vw, 2.6rem);
  font-weight: 700;
  color: var(--primary);
  line-height: 1.28;
  text-align: left;
  margin-bottom: 1rem;
}
.post-hero__meta {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  font-size: .83rem;
  color: var(--text-muted);
}
.post-hero__meta .sep { color: var(--border); }

/* Thumbnail post */
.post-thumbnail {
  max-width: var(--content-w);
  margin: 2.5rem auto 0;
  padding: 0 2rem;
}
.post-thumbnail img {
  width: 100%;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
}

/* Corps article */
.post-content-wrap {
  max-width: var(--content-w);
  margin: 0 auto;
  padding: 2.5rem 2rem 3rem;
}
.post-content-wrap .post-content {
  font-family: var(--font-body);
  font-size: 1.06rem;
  line-height: 1.82;
  color: var(--text);
}
.post-content-wrap .post-content h2 {
  font-family: var(--font-title);
  font-size: 1.45rem;
  color: var(--primary);
  margin: 2.5rem 0 1rem;
  font-weight: 600;
  border-left: 4px solid var(--accent);
  padding-left: .9rem;
}
.post-content-wrap .post-content h3 {
  font-family: var(--font-title);
  font-size: 1.2rem;
  color: var(--primary);
  margin: 2rem 0 .75rem;
}
.post-content-wrap .post-content p { margin-bottom: 1.25rem; }
.post-content-wrap .post-content ul,
.post-content-wrap .post-content ol {
  padding-left: 1.75rem;
  margin-bottom: 1.25rem;
}
.post-content-wrap .post-content li { margin-bottom: .4rem; }
.post-content-wrap .post-content blockquote {
  border-left: 4px solid var(--accent);
  background: var(--secondary);
  padding: 1rem 1.5rem;
  margin: 1.75rem 0;
  border-radius: 0 var(--radius) var(--radius) 0;
  font-family: var(--font-title);
  font-style: italic;
  color: var(--primary);
  font-size: 1.05rem;
}
.post-content-wrap .post-content a { color: var(--accent); font-weight: 600; }
.post-content-wrap .post-content img {
  border-radius: var(--radius-md);
  margin: 1.5rem 0;
}

/* TOC */
.post-toc {
  background: var(--secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  margin: 0 auto 2rem;
  max-width: var(--content-w);
}
.post-toc h3 {
  font-family: var(--font-title);
  font-size: 1rem;
  color: var(--primary);
  margin-bottom: .75rem;
}

/* Signatory / Auteur */
.post-signatory {
  max-width: var(--content-w);
  margin: 0 auto 3rem;
  padding: 1.5rem 2rem;
}
.post-signatory-inner {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  background: var(--secondary);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  border: 1px solid var(--border);
}
.post-signatory-inner .author-meta { flex: 1; }
.post-signatory-inner .author-label {
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: .3rem;
}

/* Articles liés */
.post-related {
  background: var(--secondary);
  padding: 3.5rem 2rem 4rem;
  border-top: 1px solid var(--border);
}
.post-related__inner {
  max-width: var(--max-w);
  margin: 0 auto;
}
.post-related__title {
  font-family: var(--font-title);
  font-size: 1.4rem;
  color: var(--primary);
  margin-bottom: 2rem;
  padding-bottom: .75rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
}
.post-related__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  background: var(--primary);
  color: rgba(255,255,255,.65);
  padding: 2rem 2rem;
  text-align: center;
  font-size: .82rem;
}
.site-footer a { color: var(--accent-light); text-decoration: none; }
.site-footer a:hover { text-decoration: underline; }
.site-footer p + p { margin-top: .4rem; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 992px) {
  .showcase-grid,
  .postlist-grid,
  .post-related__grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .index-intro-inner .content-body { columns: 1; }
  .nav-toggle { display: flex; }
  .nav-menu {
    display: none;
    position: absolute;
    top: 88px;
    left: 0;
    right: 0;
    background: var(--primary);
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem 0 1.5rem;
    box-shadow: 0 8px 24px rgba(0,0,0,.25);
  }
  .nav-menu.is-open { display: flex; }
  .nav-menu a { padding: .65rem 2rem; border-bottom: none; font-size: .95rem; }
  .site-nav { position: relative; }
}

@media (max-width: 600px) {
  .showcase-grid,
  .postlist-grid,
  .post-related__grid {
    grid-template-columns: 1fr;
  }
  .nav-inner { min-height: 72px; }
  .nav-logo img { height: 48px; }
  .nav-menu { top: 72px; }
  .index-banner .thumb-img,
  .index-banner img { height: 240px; }
  .index-intro { padding: 2rem 0; }
  .postlist-hero { padding: 2rem 1rem 1.75rem; }
  .post-hero { padding: 2rem 1rem 2rem; }
  .container,
  .container--narrow,
  .post-content-wrap,
  .post-thumbnail,
  .post-signatory,
  .post-related { padding-left: 1rem; padding-right: 1rem; }
}

@media (min-width: 1400px) {
  .index-banner .thumb-img,
  .index-banner img { height: 600px; }
}