:root {
  --bg: #ffffff;
  --bg-soft: #f1f5f9;
  --bg-card: #ffffff;
  --border: #e2e8f0;
  --border-strong: #cbd5e1;
  --text: #020817;
  --text-soft: #475569;
  --text-faint: #64748b;
  --ink: #020817;
  --accent: #0a0e24;
  --accent-light: #6b7280;
  --accent-soft: #e5e7eb;
  --accent-contrast: #ffffff;
  --ink-soft: #1e2338;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 1px 3px rgba(0,0,0,0.07), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-lg: 0 4px 20px rgba(0,0,0,0.06);
  --radius-lg: 12px;
  --radius-md: 10px;
  --radius-sm: 8px;
  --radius-pill: 999px;
}

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

button, input, select, textarea { font-family: inherit; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
strong, b { font-weight: 500; }

.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 32px;
}

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: 8px;
  font-weight: 400;
  font-size: 14px;
  letter-spacing: -0.005em;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease, opacity 0.15s ease;
  white-space: nowrap;
}

.btn-primary { background: var(--accent); color: var(--accent-contrast); }
.btn-primary:hover { opacity: 0.88; }
.btn-secondary { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { border-color: var(--ink); }
.btn-sm { padding: 9px 18px; font-size: 13.5px; }

/* ---------- Header ---------- */
header.site {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.9);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
  gap: 24px;
  max-width: 1240px;
}

.logo {
  font-weight: 400;
  font-size: 19px;
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.logo .logo-mark { height: 22px; width: auto; }

.logo-swap { display: inline-flex; align-items: baseline; font-weight: 700; font-size: 19px; letter-spacing: -0.01em; color: var(--ink); }
.logo-swap .ls-cell { position: relative; display: inline-block; height: 1em; overflow: hidden; line-height: 1; }
.logo-swap .ls-primary, .logo-swap .ls-secondary { display: block; transition: transform 0.45s cubic-bezier(0.65,0,0.35,1), top 0.45s cubic-bezier(0.65,0,0.35,1); }
.logo-swap .ls-secondary { position: absolute; left: 0; top: 100%; }

.nav-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.01em;
  color: var(--ink);
  flex: 1;
}

.nav-links a:hover { color: var(--accent); }
.nav-cta { flex-shrink: 0; }

@media (max-width: 760px) {
  .nav-links { display: none; }
}

/* ---------- Breadcrumb ---------- */
.breadcrumb {
  font-size: 13px;
  color: var(--text-faint);
  margin: 40px 0 20px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

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

/* ---------- Blog listing ---------- */
.blog-hero {
  padding: 40px 0 20px;
  text-align: center;
}

.blog-hero .eyebrow {
  display: inline-flex;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 20px;
}

.blog-hero h1 {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 300;
  letter-spacing: -0.025em;
  line-height: 1.15;
  color: var(--ink);
  margin-bottom: 16px;
}

.blog-hero p {
  color: var(--text-soft);
  font-size: 1.1rem;
  max-width: 620px;
  margin: 0 auto;
}

/* ---------- Blog listing : rangée vedette ---------- */
.blog-layout { padding: 48px 0 100px; }

.blog-featured-row {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 24px;
  align-items: stretch;
}

.blog-card, .blog-feature-card {
  display: flex;
  flex-direction: column;
  color: inherit;
  transition: transform 0.2s ease;
}

.blog-feature-card:hover, .blog-card:hover { transform: translateY(-3px); }

.card-media {
  position: relative;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  align-items: flex-start;
  padding: 20px;
  aspect-ratio: 16 / 10;
  margin-bottom: 20px;
}

.blog-feature-card:hover .card-media, .blog-card:hover .card-media { border-color: var(--border-strong); }

.blog-feature-card .card-media { aspect-ratio: 16 / 11; }

.card-media--ink { background: linear-gradient(155deg, var(--ink) 0%, var(--ink-soft) 100%); }
.card-media--gray-light { background: linear-gradient(155deg, var(--bg-soft) 0%, var(--border) 100%); }
.card-media--gray-mid { background: linear-gradient(155deg, var(--border) 0%, var(--border-strong) 100%); }

.card-media-icon {
  position: absolute;
  right: 6%;
  bottom: -8%;
  width: 46%;
  max-width: 190px;
  opacity: 0.9;
}

.card-media--ink .card-media-icon { color: rgba(255,255,255,0.14); }
.card-media--gray-light .card-media-icon { color: rgba(10,14,36,0.14); }
.card-media--gray-mid .card-media-icon { color: rgba(10,14,36,0.2); }

.media-tag {
  display: inline-flex;
  background: rgba(255,255,255,0.92);
  color: var(--ink);
  font-size: 12px;
  font-weight: 500;
  padding: 6px 13px;
  border-radius: var(--radius-sm);
  position: relative;
  z-index: 1;
}

.card-media--ink .media-tag { background: rgba(255,255,255,0.14); color: #fff; backdrop-filter: blur(6px); }

.blog-feature-card h2 {
  font-size: 1.7rem;
  font-weight: 500;
  letter-spacing: -0.015em;
  color: var(--ink);
  line-height: 1.3;
  margin-bottom: 12px;
}

.blog-card h3 {
  font-size: 1.05rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--ink);
  line-height: 1.35;
  margin-bottom: 10px;
}

.card-excerpt {
  color: var(--text-soft);
  font-size: 0.98rem;
  line-height: 1.6;
  margin-bottom: 16px;
  max-width: 46ch;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-top: auto;
  padding-top: 4px;
}

.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12.5px;
  color: var(--text-faint);
}

.meta-item svg { width: 14px; height: 14px; flex-shrink: 0; }

.blog-secondary-stack {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.blog-secondary-stack .blog-card { flex: 1; }
.blog-secondary-stack .card-media { margin-bottom: 16px; }

/* ---------- Catégories ---------- */
.blog-lower {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 40px;
  margin-top: 56px;
  padding-top: 40px;
  border-top: 1px solid var(--border);
  align-items: start;
}

.blog-lower-note { color: var(--text-soft); font-size: 1rem; max-width: 52ch; }
.blog-lower-note strong { color: var(--ink); }

.categories-panel h3 {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 4px;
}

.categories-panel .underline {
  display: block;
  width: 34px;
  height: 3px;
  background: var(--accent);
  border-radius: 2px;
  margin-bottom: 18px;
}

.category-list { display: flex; flex-direction: column; gap: 10px; }

.category-pill {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  font-size: 13.5px;
  font-weight: 500;
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease;
}

.category-pill .count { color: var(--text-faint); font-weight: 400; }

.category-pill:hover { border-color: var(--border-strong); }

.category-pill.active {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent);
}

.category-pill.active .count { color: var(--accent); }

.blog-card.is-hidden, .blog-feature-card.is-hidden { display: none; }

@media (max-width: 900px) {
  .blog-featured-row { grid-template-columns: 1fr; }
  .blog-lower { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .card-media { aspect-ratio: 16 / 9; }
}

/* ---------- Article ---------- */
.article-header {
  padding: 8px 0 32px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 44px;
}

.article-header .tag {
  display: inline-flex;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 12.5px;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  margin-bottom: 20px;
}

.article-header h1 {
  font-size: clamp(1.9rem, 3.6vw, 2.7rem);
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--ink);
  margin-bottom: 18px;
}

.article-header .meta {
  font-size: 13.5px;
  color: var(--text-faint);
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.article-body { padding-bottom: 40px; max-width: 720px; }

.article-body h2 {
  font-size: 1.55rem;
  font-weight: 500;
  letter-spacing: -0.015em;
  color: var(--ink);
  margin: 44px 0 16px;
}

.article-body h3 {
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--ink);
  margin: 28px 0 12px;
}

.article-body p {
  color: var(--text-soft);
  font-size: 1.05rem;
  margin-bottom: 18px;
  line-height: 1.75;
}

.article-body ul, .article-body ol {
  color: var(--text-soft);
  font-size: 1.05rem;
  line-height: 1.75;
  margin: 0 0 18px 1.3rem;
}

.article-body li { margin-bottom: 8px; }
.article-body strong { color: var(--ink); font-weight: 500; }

.tldr {
  background: var(--accent-soft);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin: 8px 0 36px;
}

.tldr .label {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
}

.tldr p { color: var(--text); font-size: 1rem; margin-bottom: 0; }

.table-scroll {
  overflow-x: auto;
  margin: 0 0 28px;
  -webkit-overflow-scrolling: touch;
}

.article-body table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  margin-bottom: 0;
  font-size: 0.92rem;
}

.article-body th,
.article-body td {
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  color: var(--text-soft);
  line-height: 1.5;
}

.article-body th {
  color: var(--ink);
  font-weight: 500;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-bottom: 1px solid var(--border-strong);
  white-space: nowrap;
}

.faq-block {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  margin-top: 8px;
}

.faq-block .q {
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 8px;
}

.faq-block .qa { margin-bottom: 24px; }

.article-cta {
  background: linear-gradient(135deg, var(--accent) 0%, #374151 100%);
  border-radius: var(--radius-lg);
  padding: 48px 44px;
  text-align: center;
  color: #ffffff;
  margin: 48px 0 60px;
}

.article-cta h3 { color: #ffffff; font-size: 1.5rem; font-weight: 500; margin-bottom: 12px; }
.article-cta p { color: rgba(255,255,255,0.85); margin-bottom: 24px; max-width: 480px; margin-left: auto; margin-right: auto; }
.article-cta .btn-primary { background: #ffffff; color: var(--accent); }
.article-cta .btn-primary:hover { opacity: 1; background: #f3f4f6; }

.article-nav {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 13.5px;
  flex-wrap: wrap;
}

.article-nav a { color: var(--text-soft); }
.article-nav a:hover { color: var(--accent); }

/* ---------- Footer ---------- */
footer.site {
  padding: 56px 0 32px;
  border-top: 1px solid var(--border);
  margin-top: 40px;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 13px;
  color: var(--text-faint);
}

.footer-bottom a { color: var(--text-faint); }
.footer-bottom a:hover { color: var(--ink); }
.footer-bottom .sep { color: var(--border-strong); }

@media (max-width: 760px) {
  .container { padding: 0 20px; }
  .article-cta { padding: 36px 24px; }
}