/* =============================================================
   MASTER BLOG — SINGLE.CSS
   Articles et pages : hero article, contenu typographique,
   blockquote, tableaux, YouTube facade, auteur, TOC, articles similaires.
   ============================================================= */

/* ── ARTICLE SINGLE ───────────────────────────────────────── */

/* Hero : image + titre en overlay */
.article-hero {
  position: relative;
  width: 100vw;
  margin-left: calc(50% - 50vw);
  margin-right: calc(50% - 50vw);
  margin-bottom: 2.5rem;
  min-height: 420px;
  display: flex;
  align-items: flex-end;
  background: var(--gradient-hero);
  overflow: hidden;
}

/* Version sans image : dégradé palette, texte clair */
.article-hero:not(.article-hero--has-image) {
  min-height: 0;
  padding: 3rem clamp(1.25rem, 5vw, 6rem) 2rem;
  align-items: stretch;
  background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-primary-dark) 60%, var(--color-primary) 100%);
}
.article-hero:not(.article-hero--has-image) .article-cat-badge {
  background: rgba(255,255,255,.15);
  color: #fff;
  border-color: rgba(255,255,255,.3);
  backdrop-filter: blur(6px);
}
.article-hero:not(.article-hero--has-image) .article-cat-badge:hover {
  background: rgba(255,255,255,.25);
}
.article-hero:not(.article-hero--has-image) .article-title {
  color: #fff;
  text-shadow: 0 2px 20px rgba(0,0,0,.35);
}
.article-hero:not(.article-hero--has-image) .article-meta-bar {
  color: rgba(255,255,255,.75);
  border-bottom-color: rgba(255,255,255,.2);
}

/* Image de fond */
.article-hero-image {
  position: absolute;
  inset: 0;
}
.article-hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
  display: block;
}

/* Gradient de contraste (bas → haut) */
.article-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    color-mix(in srgb, var(--color-dark) 82%, transparent) 0%,
    color-mix(in srgb, var(--color-dark) 50%, transparent) 40%,
    color-mix(in srgb, var(--color-dark) 15%, transparent) 70%,
    transparent 100%
  );
}

/* Contenu textuel positionné au-dessus */
.article-hero-content {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--content-width, 760px);
  margin: 0 auto;
  padding: 5rem clamp(1.25rem, 5vw, 3rem) 2.25rem;
}

/* Badge catégorie sur fond image */
.article-hero--has-image .article-cat-badge {
  background: rgba(255,255,255,.15);
  color: #fff;
  border-color: rgba(255,255,255,.3);
  backdrop-filter: blur(6px);
}
.article-hero--has-image .article-cat-badge:hover {
  background: rgba(255,255,255,.25);
}

.article-cat-badge {
  display: inline-flex;
  align-items: center;
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-size: .6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .07em;
  padding: .3rem .875rem;
  border-radius: 999px;
  margin-bottom: .875rem;
  border: 1px solid var(--color-primary-border);
}

.article-title {
  font-size: clamp(1.625rem, 4vw, 2.75rem);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -.03em;
  margin-bottom: 1.125rem;
  color: var(--color-text);
}
.article-hero--has-image .article-title {
  color: #fff;
  text-shadow: 0 2px 20px rgba(0,0,0,.4);
}

.article-meta-bar {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  font-size: .8125rem;
  color: var(--color-text-muted);
  padding-bottom: 0;
  border-bottom: none;
  margin-bottom: 0;
}
/* Séparateur sous la meta — uniquement sans image */
.article-hero:not(.article-hero--has-image) .article-meta-bar {
  padding-bottom: 1.125rem;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 1.5rem;
}
.article-hero--has-image .article-meta-bar {
  color: rgba(255,255,255,.75);
}

.meta-author {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-weight: 700;
  color: var(--color-text);
}
.article-hero--has-image .meta-author,
.article-hero:not(.article-hero--has-image) .meta-author { color: #fff; }
.article-hero--has-image .meta-author a,
.article-hero:not(.article-hero--has-image) .meta-author a { color: #fff; }

.meta-avatar {
  width: 30px; height: 30px;
  border-radius: 50%;
  overflow: hidden;
  border: 2px solid var(--color-primary-border);
  flex-shrink: 0;
  background: var(--color-primary-light);
}
.article-hero--has-image .meta-avatar,
.article-hero:not(.article-hero--has-image) .meta-avatar { border-color: rgba(255,255,255,.4); }
.meta-avatar img { width: 100%; height: 100%; object-fit: cover; }

.meta-reading-time {
  background: var(--color-bg-secondary);
  padding: .25rem .75rem;
  border-radius: 999px;
  white-space: nowrap;
  font-weight: 600;
}
.article-hero--has-image .meta-reading-time,
.article-hero:not(.article-hero--has-image) .meta-reading-time {
  background: rgba(255,255,255,.15);
  color: #fff;
  backdrop-filter: blur(6px);
}

/* Schema badges */
.schema-indicators { display: flex; gap: .375rem; flex-wrap: wrap; margin-bottom: 1.25rem; }
.schema-badge {
  display: inline-flex;
  align-items: center;
  gap: .25rem;
  font-size: .6875rem;
  font-weight: 700;
  padding: .2rem .625rem;
  border-radius: 999px;
  background: #f0fdf4;
  color: #166534;
  border: 1px solid #bbf7d0;
}
.schema-badge::before { content: '✓'; }

/* Corps article */
.article-content {
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--color-text);
}
.article-content h2 {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -.025em;
  margin: 2.5rem 0 .875rem;
  padding-bottom: .625rem;
  border-bottom: 2px solid var(--color-border);
  color: var(--color-text);
}
.article-content h3 {
  font-size: 1.1875rem;
  font-weight: 700;
  letter-spacing: -.02em;
  margin: 2rem 0 .625rem;
}
.article-content h4 { font-size: 1rem; font-weight: 700; margin: 1.5rem 0 .5rem; }
.article-content p  { margin-bottom: 1.375rem; }
.article-content a  {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--color-primary-border);
  transition: text-decoration-color var(--transition);
}
.article-content a:hover { text-decoration-color: var(--color-primary); }
.article-content ul, .article-content ol { margin: 1rem 0 1.375rem 1.5rem; }
.article-content ul { list-style: none; }
.article-content ul li { padding-left: 1.25rem; position: relative; margin-bottom: .5rem; }
.article-content ul li::before {
  content: '';
  position: absolute;
  left: 0; top: .65em;
  width: 6px; height: 6px;
  background: var(--gradient-primary);
  border-radius: 50%;
}
.article-content ol { list-style: decimal; }
.article-content li { margin-bottom: .5rem; }
.article-content blockquote {
  position: relative;
  border-left: 3px solid var(--color-primary);
  padding: 1.75rem 1.75rem 1.75rem 2.25rem;
  margin: 2.5rem 0;
  background: var(--color-primary-light);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  overflow: hidden;
}
.article-content blockquote::before {
  content: '\201C';
  position: absolute;
  top: -.5rem;
  right: 1.25rem;
  font-size: 7rem;
  line-height: 1;
  color: var(--color-primary);
  opacity: .12;
  font-family: Georgia, 'Times New Roman', serif;
  pointer-events: none;
  user-select: none;
}
.article-content blockquote p {
  font-size: 1.125rem;
  font-style: italic;
  color: var(--color-text);
  line-height: 1.75;
  margin: 0;
  font-weight: 500;
}
.article-content blockquote cite {
  display: block;
  margin-top: .875rem;
  font-size: .8125rem;
  font-style: normal;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: .02em;
  text-transform: uppercase;
}
.article-content blockquote cite::before {
  content: '— ';
}
.article-content code {
  font-family: var(--font-mono);
  font-size: .875em;
  background: var(--color-bg-secondary);
  padding: .15em .4em;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  color: var(--color-primary);
}
.article-content pre {
  background: #0f172a;
  color: #e2e8f0;
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  overflow-x: auto;
  margin: 1.5rem 0;
  font-size: .875rem;
}
.article-content pre code { background: none; border: none; padding: 0; color: inherit; }
.article-content img { border-radius: var(--radius-lg); margin: 1.5rem 0; box-shadow: var(--shadow-md); }

/* ── FAÇADE YOUTUBE ──────────────────────────────────────────── */
.yt-facade {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #000 center / cover no-repeat;
  border-radius: var(--radius-lg);
  cursor: pointer;
  overflow: hidden;
  margin: 1.5rem 0;
}
.yt-facade::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,.2);
  transition: background .2s;
}
.yt-facade:hover::after { background: rgba(0,0,0,.1); }
.yt-facade-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 1;
  transition: transform .2s;
}
.yt-facade:hover .yt-facade-btn { transform: scale(1.1); }
.yt-facade + iframe,
.article-content iframe {
  width: 100%;
  aspect-ratio: 16 / 9;
  border: none;
  border-radius: var(--radius-lg);
  margin: 1.5rem 0;
}
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  font-size: .9375rem;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 1px 4px rgba(0,0,0,.08);
}
.article-content th {
  background: var(--color-primary);
  color: #fff;
  font-weight: 700;
  font-size: .8125rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  padding: .875rem 1.25rem;
  text-align: left;
}
.article-content td {
  padding: .875rem 1.25rem;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
  vertical-align: top;
  line-height: 1.55;
}
.article-content tr:last-child td { border-bottom: none; }
.article-content tbody tr:nth-child(even) { background: var(--color-bg-secondary); }
.article-content tbody tr:hover { background: var(--color-primary-light); transition: background .15s; }

/* Encadré expert E-E-A-T */
.expert-note {
  background: var(--gradient-hero);
  border-left: 4px solid var(--color-primary);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  padding: 1.25rem 1.5rem;
  margin: 2rem 0;
}
.expert-note-label {
  font-size: .6875rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .08em;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: .5rem;
}


/* ── AUTEUR ───────────────────────────────────────────────── */
.author-card {
  display: flex;
  gap: 1.25rem;
  background: var(--gradient-hero);
  border: 1px solid var(--color-primary-border);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  margin: 2rem 0;
}
.author-avatar {
  width: 72px; height: 72px;
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid #fff;
  box-shadow: 0 0 0 3px var(--color-primary-border), var(--shadow-sm);
  flex-shrink: 0;
  background: var(--color-primary-light);
}
.author-avatar img { width: 100%; height: 100%; object-fit: cover; }
.author-label {
  font-size: .6875rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .08em;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: .375rem;
}
.author-name {
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: -.01em;
  margin-bottom: .25rem;
}
.author-credentials {
  font-size: .8125rem;
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: .5rem;
}
.author-bio { font-size: .9375rem; color: var(--color-text-muted); line-height: 1.65; }
.author-card .btn-primary { margin-top: 1.25rem; }

/* ── ARTICLES SIMILAIRES — 6 articles en 3 colonnes ──────── */
.related-articles { margin-top: 3rem; margin-bottom: 4rem; }
.related-articles .card-title { -webkit-line-clamp: 3; }

.related-label {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -.02em;
  margin-bottom: 1.5rem;
  padding-left: .875rem;
  position: relative;
}
.related-label::before {
  content: '';
  position: absolute;
  left: 0; top: 50%;
  transform: translateY(-50%);
  width: 4px; height: 1.1em;
  background: var(--gradient-primary);
  border-radius: 2px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}


/* ── SINGLE ARTICLE LAYOUT (TOC gauche + contenu) ───────────── */
.container--single {
  max-width: calc(var(--container-max) + 220px + 2.5rem);
}

.single-outer {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 2.5rem;
  align-items: start;
  margin-top: 2.5rem;
}

.single-body { min-width: 0; }

.article-toc-aside {
  position: sticky;
  top: 5.5rem;
  max-height: calc(100vh - 7rem);
  overflow-y: auto;
  scrollbar-width: none;
}
.article-toc-aside::-webkit-scrollbar { display: none; }

/* ── TABLE OF CONTENTS ─────────────────────────────────────── */
.article-toc {
  background: var(--color-bg-secondary);
  border-radius: var(--radius-md);
  padding: 1.375rem 1.25rem 1.5rem;
}

/* Label statique — masqué partout (remplacé par le toggle) */
.article-toc-label { display: none; }

/* Toggle button — visible sur desktop et mobile */
.article-toc-toggle {
  display: flex;
  align-items: center;
  gap: .5rem;
  width: 100%;
  padding: 0;
  margin-bottom: 1.25rem;
  background: none;
  border: none;
  cursor: pointer;
  font-size: .6875rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  text-align: left;
  transition: color var(--transition);
}
.article-toc-toggle:hover { color: var(--color-primary); }
.article-toc-toggle svg:first-child {
  width: .875rem; height: .875rem; flex-shrink: 0; color: var(--color-primary);
}
.article-toc-chevron {
  width: .75rem; height: .75rem;
  margin-left: auto; flex-shrink: 0;
  transition: transform var(--transition);
}
.article-toc-toggle[aria-expanded="true"] .article-toc-chevron {
  transform: rotate(180deg);
}

/* Liste H2 */
.article-toc-list[hidden] { display: none; }
.article-toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: .875rem;
}


.article-toc-list > li > a {
  font-size: .8125rem;
  font-weight: 600;
  color: var(--color-text);
  text-decoration: none;
  line-height: 1.45;
  transition: color var(--transition);
}
.article-toc-list > li > a:hover { color: var(--color-primary); }

/* Sous-liste H3 avec chiffres romains */
.article-toc-sub {
  list-style: none;
  margin: .625rem 0 0 .25rem;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: .5rem;
  counter-reset: toc-roman;
}

.article-toc-sub > li {
  counter-increment: toc-roman;
  display: flex;
  align-items: baseline;
  gap: .375rem;
}

.article-toc-sub > li::before {
  content: counter(toc-roman, lower-roman) ".";
  font-size: .6875rem;
  font-weight: 700;
  color: var(--color-primary);
  min-width: 1.375rem;
  flex-shrink: 0;
  opacity: .7;
}

.article-toc-sub > li > a {
  font-size: .75rem;
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  line-height: 1.45;
  transition: color var(--transition);
}
.article-toc-sub > li > a:hover { color: var(--color-primary); }

.toc-list { display: flex; flex-direction: column; gap: .375rem; }
.toc-item { font-size: .8125rem; font-weight: 500; }
.toc-item a { color: var(--color-primary); transition: color var(--transition); }
.toc-item--sub { padding-left: .875rem; }
.toc-item--sub a { color: var(--color-text-muted); }


/* ── RESPONSIVE — single ──────────────────────────────────── */
@media (max-width: 900px) {
  .related-grid { grid-template-columns: repeat(2, 1fr); }

  /* TOC mobile : colonne unique, repliable */
  .container--single { max-width: var(--container-max); }
  .single-outer {
    grid-template-columns: 1fr;
    gap: 0;
    margin-top: 1.5rem;
  }
  .article-toc-aside {
    position: static;
    max-height: none;
    margin-bottom: 2rem;
  }
  .article-toc {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 0;
    overflow: hidden;
  }
  .article-toc-toggle {
    padding: .875rem 1.125rem;
    font-size: .9375rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0;
    letter-spacing: 0;
    text-transform: none;
  }
  .article-toc-toggle[aria-expanded="true"] .article-toc-chevron {
    transform: rotate(180deg);
  }
  .article-toc-list[hidden] { display: none; }
  .article-toc-list {
    padding: .75rem 1.125rem 1.125rem;
    border-top: 1px solid var(--color-border);
  }
}

@media (max-width: 768px) {
  .related-grid { grid-template-columns: 1fr; }
  .author-card { flex-direction: column; align-items: center; text-align: center; }
}

@media (max-width: 480px) {
  .schema-indicators { display: none; }
  .related-grid { grid-template-columns: 1fr; }
}