/* ================================================
   QUANTSTONE BLOG — CSS autonome
   Tokens repris de l'app Next (globals.css) :
   fond #050810, cartes #0f1729, accent cyan #00d4ff,
   texte #f5f5f0 / #8b9dbe / #5a6e92, Inter.
   Servi sous /fr/blog/blog.css (aucune dépendance
   aux assets buildés /_next/ de l'app).
   ================================================ */

:root {
  --bg-deep: #050810;
  --bg-layer: #0a0f1a;
  --bg-card: #0f1729;
  --cyan: #00d4ff;
  --blue: #3b82f6;
  --cyan-dim: rgba(0, 212, 255, 0.12);
  --cyan-glow: rgba(0, 212, 255, 0.35);
  --text-primary: #f5f5f0;
  --text-secondary: #8b9dbe;
  --text-muted: #5a6e92;
  --border: rgba(0, 212, 255, 0.08);
  --border-hover: rgba(0, 212, 255, 0.2);
  --border-subtle: rgba(255, 255, 255, 0.04);
  --shadow-card: 0 4px 40px rgba(0, 0, 0, 0.4), 0 0 80px rgba(0, 212, 255, 0.03);
  --shadow-cta: 0 0 24px rgba(0, 212, 255, 0.35), 0 4px 16px rgba(0, 0, 0, 0.4);
  --grad-cyan: linear-gradient(135deg, #00d4ff 0%, #3b82f6 100%);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg-deep);
  color: var(--text-primary);
  font-family: var(--font);
  font-weight: 400;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

.container {
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 24px;
}

.container--narrow { max-width: 780px; }

a { color: var(--cyan); text-decoration: none; }
a:hover { text-decoration: underline; }

.text-gradient {
  background: var(--grad-cyan);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* --- Boutons ------------------------------------------------------------- */
.btn {
  display: inline-block;
  border: none;
  border-radius: 14px;
  padding: 14px 28px;
  font-family: var(--font);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: transform 0.3s ease;
}

.btn--primary {
  background: var(--grad-cyan);
  color: #fff;
  box-shadow: var(--shadow-cta);
}

.btn--primary:hover { transform: scale(1.03); text-decoration: none; }

/* --- Navbar ---------------------------------------------------------------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  background: rgba(5, 8, 16, 0.85);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border-subtle);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.navbar__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.navbar__logo:hover { text-decoration: none; }

.navbar__logo-icon { width: 40px; height: 40px; }

.navbar__logo-text {
  font-size: 19px;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}

.navbar__links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.navbar__links a {
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  transition: color 0.2s ease;
}

.navbar__links a:hover, .navbar__links a.active { color: var(--text-primary); text-decoration: none; }

.navbar__cta { padding: 11px 22px !important; font-size: 13px !important; }

@media (max-width: 900px) {
  .navbar__links { display: none; }
}

/* --- Page article -------------------------------------------------------------- */
.article-page { padding: 128px 0 80px; }

.article-breadcrumb {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 24px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.article-breadcrumb a { color: var(--text-secondary); }

.article-title {
  font-size: 40px;
  font-weight: 800;
  letter-spacing: -1.2px;
  line-height: 1.12;
  margin-bottom: 16px;
}

.article-meta {
  color: var(--text-muted);
  font-size: 13px;
  margin-bottom: 28px;
}

.article-cover {
  width: 100%;
  height: auto;
  border-radius: 22px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
  margin-bottom: 40px;
}

/* --- Corps d'article -------------------------------------------------------------- */
.article-body { font-size: 16px; color: var(--text-secondary); }

.article-body h2 {
  font-size: 27px;
  font-weight: 700;
  letter-spacing: -0.6px;
  color: var(--text-primary);
  margin: 44px 0 16px;
  line-height: 1.2;
}

.article-body h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 32px 0 12px;
}

.article-body p { margin-bottom: 16px; }

.article-body ul, .article-body ol { margin: 0 0 16px 22px; }
.article-body li { margin-bottom: 8px; }

.article-body strong { color: var(--text-primary); font-weight: 600; }

.article-body blockquote {
  border-left: 3px solid var(--cyan);
  background: var(--cyan-dim);
  border-radius: 0 14px 14px 0;
  padding: 16px 20px;
  margin: 0 0 16px;
  color: var(--text-primary);
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 20px;
  font-size: 14px;
  display: block;
  overflow-x: auto;
}

.article-body th, .article-body td {
  border: 1px solid var(--border);
  padding: 10px 14px;
  text-align: left;
}

.article-body th {
  background: var(--bg-card);
  color: var(--text-primary);
  font-weight: 600;
}

.article-body td { background: rgba(15, 23, 41, 0.5); }

/* --- Encarts CTA (propriété du script) ---------------------------------------------- */
.article-cta {
  background: var(--bg-card);
  border: 1px solid var(--border-hover);
  border-radius: 22px;
  box-shadow: var(--shadow-card);
  padding: 32px;
  margin: 36px 0;
  text-align: center;
}

.article-cta__title {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--text-primary);
  margin: 0 0 12px;
}

h2.article-cta__title { margin-top: 0; }

.article-cta__text {
  color: var(--text-secondary);
  font-size: 15px;
  margin-bottom: 20px;
}

.article-cta__risk {
  color: var(--text-muted);
  font-size: 11px;
  margin: 16px 0 0;
}

.article-cta--soft {
  text-align: left;
  padding: 22px 26px;
  border-color: var(--border);
  background: rgba(15, 23, 41, 0.6);
}

.article-cta--soft .article-cta__text { margin-bottom: 0; font-size: 14px; }
.article-cta--soft .article-cta__risk { margin-top: 10px; }

/* --- FAQ ------------------------------------------------------------------------ */
.article-faq { margin: 48px 0 8px; }

.article-faq__title {
  font-size: 27px;
  font-weight: 700;
  letter-spacing: -0.6px;
  margin-bottom: 20px;
}

.article-faq__item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  margin-bottom: 10px;
  overflow: hidden;
}

.article-faq__item summary {
  cursor: pointer;
  padding: 16px 20px;
  font-weight: 600;
  font-size: 15px;
  color: var(--text-primary);
  list-style: none;
  position: relative;
  padding-right: 44px;
}

.article-faq__item summary::-webkit-details-marker { display: none; }

.article-faq__item summary::after {
  content: '+';
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--cyan);
  font-size: 20px;
  font-weight: 400;
}

.article-faq__item[open] summary::after { content: '×'; }

.article-faq__answer {
  padding: 0 20px 16px;
  color: var(--text-secondary);
  font-size: 14px;
}

/* --- À lire aussi ------------------------------------------------------------------- */
.related-section { margin-top: 56px; }

.related-section__title {
  font-size: 27px;
  font-weight: 700;
  letter-spacing: -0.6px;
  margin-bottom: 20px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.related-card {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px;
  color: var(--text-primary);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.4;
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.related-card:hover {
  transform: translateY(-3px);
  border-color: var(--cyan-glow);
  text-decoration: none;
}

.related-card__label {
  display: block;
  color: var(--cyan);
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 8px;
}

@media (max-width: 700px) {
  .related-grid { grid-template-columns: 1fr; }
}

/* --- Index du blog -------------------------------------------------------------------- */
.blog-hero {
  padding: 150px 0 40px;
  text-align: center;
  background:
    radial-gradient(ellipse 60% 40% at 50% 0%, rgba(0, 212, 255, 0.07), transparent),
    var(--bg-deep);
}

.blog-hero__title {
  font-size: 52px;
  font-weight: 800;
  letter-spacing: -2px;
  line-height: 1.05;
  margin-bottom: 16px;
}

.blog-hero__subtitle {
  color: var(--text-secondary);
  font-size: 16px;
  max-width: 640px;
  margin: 0 auto;
}

.blog-grid-section { padding: 24px 0 80px; }

.blog-section { margin-bottom: 48px; }

.blog-section__title {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.post-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 22px;
  box-shadow: var(--shadow-card);
  overflow: hidden;
  padding-bottom: 20px;
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.4s ease;
}

.post-card:hover {
  transform: translateY(-4px);
  border-color: var(--cyan-glow);
}

.post-card--pillar { border-color: var(--border-hover); }

.post-card__cover {
  width: 100%;
  height: auto;
  display: block;
  border-bottom: 1px solid var(--border-subtle);
}

.post-card__date {
  color: var(--text-muted);
  font-size: 12px;
  margin: 16px 20px 8px;
}

.post-card__date strong { color: var(--cyan); font-weight: 600; }

.post-card__title {
  font-size: 17px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.3px;
  margin: 0 20px 8px;
}

.post-card__title a { color: var(--text-primary); }
.post-card__title a:hover { color: var(--cyan); text-decoration: none; }

.post-card__desc {
  color: var(--text-secondary);
  font-size: 13px;
  margin: 0 20px 14px;
}

.post-card__link {
  margin: 0 20px;
  font-size: 13px;
  font-weight: 600;
}

@media (max-width: 1000px) {
  .blog-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .blog-grid { grid-template-columns: 1fr; }
  .blog-hero__title { font-size: 34px; letter-spacing: -1px; }
}

/* --- Footer ------------------------------------------------------------------------------ */
.footer {
  background: var(--bg-deep);
  border-top: 1px solid var(--border);
  padding: 56px 0 40px;
}

.footer__top {
  display: grid;
  grid-template-columns: 1.2fr 2fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer__brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.footer__brand-lockup:hover { text-decoration: none; }

.footer__brand-icon { width: 40px; height: 40px; }

.footer__brand-text {
  font-size: 19px;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}

.footer__desc {
  color: var(--text-secondary);
  font-size: 13px;
  max-width: 300px;
}

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

.footer__col h4 {
  color: var(--text-primary);
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 14px;
}

.footer__col ul { list-style: none; }

.footer__col li { margin-bottom: 8px; }

.footer__col a {
  color: var(--text-secondary);
  font-size: 13px;
  transition: color 0.2s ease;
}

.footer__col a:hover { color: var(--cyan); text-decoration: none; }

.footer__sep {
  height: 1px;
  background: var(--border);
  margin-bottom: 28px;
}

.footer__bottom p {
  color: var(--text-muted);
  font-size: 11px;
  margin-bottom: 10px;
}

.footer__risk { line-height: 1.7; }

@media (max-width: 800px) {
  .footer__top { grid-template-columns: 1fr; }
  .article-title { font-size: 30px; }
  .article-page { padding-top: 108px; }
}