:root {
  --bg:          #0e1116;
  --bg-elev:     #161a22;
  --bg-card:     #141821;
  --border:      #232834;
  --border-soft: #1c212b;
  --fg:          #e6e8ec;
  --fg-muted:    #9aa3b2;
  --fg-dim:      #6b7383;
  --accent:      #7c9cff;
  --accent-soft: #2a3550;
  --accent-line: #3a4a78;

  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;

  --container: 760px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 16.5px;
  line-height: 1.7;
  font-feature-settings: "ss01", "cv11";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: var(--accent); }
::selection { background: var(--accent-soft); color: #fff; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
}

nav.top {
  border-bottom: 1px solid var(--border-soft);
  padding: 18px 0;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--fg-dim);
  letter-spacing: 0.04em;
}
nav.top .container {
  max-width: 1040px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
nav.top a {
  color: var(--fg);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s ease, color 0.15s ease;
}
nav.top a:hover { color: var(--accent); border-bottom-color: var(--accent); }
nav.top .brand { color: var(--fg); font-weight: 500; letter-spacing: -0.005em; }
nav.top .crumb { color: var(--fg-dim); }
nav.top .crumb .sep { margin: 0 8px; opacity: 0.6; }

article.case-page {
  padding: 80px 0 40px;
}
article.case-page header.head {
  margin-bottom: 56px;
  max-width: var(--container);
}

/* ─── Layout avec sommaire latéral ─── */
.case-page .container.has-toc {
  max-width: 1080px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 220px;
  gap: 64px;
  align-items: start;
}
.case-page .container.has-toc .article-main {
  min-width: 0;
  max-width: var(--container);
}
.case-page .container.has-toc .article-main header.head { max-width: 100%; }

@media (max-width: 1100px) {
  .case-page .container.has-toc {
    grid-template-columns: 1fr;
    max-width: var(--container);
    gap: 0;
  }
}

aside.toc {
  position: sticky;
  top: 32px;
  align-self: start;
  padding: 0 0 0 18px;
  border-left: 1px solid var(--border-soft);
  max-height: calc(100vh - 64px);
  overflow-y: auto;
  font-size: 13px;
  line-height: 1.5;
}
aside.toc .toc-label {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin: 0 0 14px;
}
aside.toc ol {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: tocnum;
}
aside.toc ol li {
  margin: 0 0 8px;
  position: relative;
  counter-increment: tocnum;
}
aside.toc ol li::before {
  content: counter(tocnum, decimal-leading-zero);
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--fg-dim);
  margin-right: 8px;
  letter-spacing: 0.02em;
}
aside.toc ol li ol {
  margin-top: 6px;
  padding-left: 12px;
  counter-reset: subtocnum;
}
aside.toc ol li ol li {
  margin-bottom: 4px;
  counter-increment: subtocnum;
}
aside.toc ol li ol li::before {
  content: "–";
  color: var(--fg-dim);
  margin-right: 6px;
}
aside.toc a {
  color: var(--fg-muted);
  text-decoration: none;
  transition: color 0.12s ease;
}
aside.toc a:hover { color: var(--accent); }
aside.toc a.active {
  color: var(--accent);
  font-weight: 500;
}

/* En mobile : sommaire en accordion en haut */
@media (max-width: 1100px) {
  aside.toc {
    position: static;
    margin: 24px 0 40px;
    padding: 20px 22px;
    border: 1px solid var(--border-soft);
    border-radius: 8px;
    max-height: none;
  }
  aside.toc.collapsed ol { display: none; }
  aside.toc .toc-label {
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0;
  }
  aside.toc.collapsed .toc-label { margin-bottom: 0; }
  aside.toc:not(.collapsed) .toc-label { margin-bottom: 14px; }
  aside.toc .toc-toggle {
    font-family: var(--mono);
    color: var(--accent);
    font-size: 14px;
    background: none;
    border: none;
    padding: 0;
    cursor: pointer;
  }
}

/* Scroll-margin pour que les ancres ne soient pas collées en haut */
.prose h2, .prose h3 { scroll-margin-top: 24px; }
.head .eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--accent);
  text-transform: uppercase;
  margin: 0 0 20px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.head .eyebrow::before {
  content: "";
  display: inline-block;
  width: 28px; height: 1px;
  background: var(--accent);
  opacity: 0.7;
}
.head h1 {
  font-size: clamp(32px, 4.6vw, 46px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  font-weight: 600;
  margin: 0 0 24px;
  color: #f3f5f8;
}
.head .lede {
  font-size: clamp(17px, 1.6vw, 19px);
  color: var(--fg-muted);
  line-height: 1.6;
  margin: 0 0 32px;
}
.meta-row {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--fg-dim);
  letter-spacing: 0.04em;
}
.meta-row .chip {
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--fg-muted);
}

.hero-shot {
  margin: 0 0 64px;
  background: #0a0a0f;
  border: 1px solid var(--border-soft);
  border-radius: 10px;
  padding: 0;
  overflow: hidden;
}
.hero-shot img {
  display: block;
  width: 100%;
  height: auto;
}
.hero-shot figcaption {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--fg-dim);
  letter-spacing: 0.04em;
  padding: 12px 20px;
  border-top: 1px solid var(--border-soft);
  background: #0b0e13;
}

.prose h2 {
  font-size: clamp(22px, 2.4vw, 28px);
  font-weight: 600;
  letter-spacing: -0.015em;
  color: #f3f5f8;
  margin: 56px 0 18px;
  line-height: 1.25;
}
.prose h2:first-child { margin-top: 0; }
.prose h3 {
  font-size: 18px;
  font-weight: 600;
  color: #f3f5f8;
  margin: 32px 0 12px;
  letter-spacing: -0.01em;
}
.prose p {
  margin: 0 0 18px;
  color: var(--fg-muted);
}
.prose p strong { color: var(--fg); font-weight: 500; }
.prose ul, .prose ol {
  color: var(--fg-muted);
  padding-left: 22px;
  margin: 0 0 24px;
}
.prose li { margin-bottom: 10px; line-height: 1.65; }
.prose li strong { color: var(--fg); font-weight: 500; }
.prose code {
  font-family: var(--mono);
  font-size: 13.5px;
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  padding: 1px 6px;
  border-radius: 3px;
  color: var(--fg);
}
.prose blockquote {
  margin: 24px 0;
  padding: 14px 22px;
  border-left: 2px solid var(--accent-line);
  background: rgba(124,156,255,0.04);
  color: var(--fg);
  font-style: italic;
  border-radius: 0 4px 4px 0;
}

.steps {
  margin: 32px 0 40px;
  border-left: 1px solid var(--border);
  padding-left: 0;
}
.steps .step {
  padding-left: 32px;
  position: relative;
  padding-bottom: 28px;
}
.steps .step:last-child { padding-bottom: 0; }
.steps .step::before {
  content: attr(data-step);
  position: absolute;
  left: -16px;
  top: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--accent-line);
  display: grid;
  place-items: center;
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--accent);
  font-weight: 600;
}
.steps .step h3 {
  margin: 4px 0 8px;
  font-size: 17px;
  color: #f3f5f8;
}
.steps .step p {
  color: var(--fg-muted);
  font-size: 15px;
  margin: 0;
}
.steps .step p + p { margin-top: 10px; }

.callout {
  margin: 32px 0;
  padding: 20px 24px;
  background: rgba(124,156,255,0.05);
  border: 1px solid var(--accent-line);
  border-radius: 8px;
}
.callout .label {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
  display: block;
}
.callout p { margin: 0; color: var(--fg); font-size: 15px; }

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 28px 0 32px;
}
@media (max-width: 640px) { .kpi-grid { grid-template-columns: 1fr; } }
.kpi {
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: 8px;
  padding: 20px 22px;
}
.kpi .value {
  font-family: var(--mono);
  font-size: 24px;
  color: var(--accent);
  font-weight: 500;
  letter-spacing: -0.01em;
  margin-bottom: 6px;
}
.kpi .label {
  font-size: 13px;
  color: var(--fg-muted);
  line-height: 1.5;
}

details.faq {
  border-top: 1px solid var(--border-soft);
  padding: 18px 0;
}
details.faq[open] summary { color: var(--accent); }
details.faq summary {
  cursor: pointer;
  list-style: none;
  font-weight: 500;
  color: var(--fg);
  font-size: 15.5px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  transition: color 0.15s ease;
}
details.faq summary::-webkit-details-marker { display: none; }
details.faq summary::after {
  content: "+";
  font-family: var(--mono);
  color: var(--accent);
  font-size: 18px;
  transition: transform 0.2s ease;
}
details.faq[open] summary::after { content: "−"; }
details.faq[open] { padding-bottom: 24px; }
details.faq p {
  margin: 14px 0 0;
  color: var(--fg-muted);
  font-size: 15px;
  line-height: 1.65;
}

.related {
  margin: 72px 0 0;
  padding-top: 40px;
  border-top: 1px solid var(--border-soft);
}
.related h2 {
  font-size: 18px;
  font-weight: 600;
  color: #f3f5f8;
  margin: 0 0 24px;
  letter-spacing: -0.01em;
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
@media (max-width: 640px) { .related-grid { grid-template-columns: 1fr; } }
.related-card {
  display: block;
  padding: 22px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: 8px;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s ease, transform 0.1s ease;
}
.related-card:hover {
  border-color: var(--accent-line);
  transform: translateY(-1px);
}
.related-card .related-eyebrow {
  display: block;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
}
.related-card .related-title {
  display: block;
  font-size: 15.5px;
  font-weight: 500;
  color: var(--fg);
  margin-bottom: 8px;
  line-height: 1.35;
}
.related-card .related-tools {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--fg-dim);
  letter-spacing: 0.02em;
}

.cta-block {
  margin: 48px 0 0;
  padding: 36px 32px;
  background: var(--bg-card);
  border: 1px solid var(--accent-line);
  border-radius: 12px;
  text-align: center;
}
.cta-block h2 {
  margin: 0 0 12px;
  font-size: 22px;
  color: #f3f5f8;
}
.cta-block p {
  margin: 0 0 24px;
  color: var(--fg-muted);
  font-size: 15.5px;
}
.cta-block .actions { justify-content: center; }

.actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 22px;
  font-size: 14.5px;
  font-weight: 500;
  text-decoration: none;
  border-radius: 6px;
  border: 1px solid transparent;
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.1s ease;
}
.btn-primary { background: var(--accent); color: #0b0e13; font-weight: 600; }
.btn-primary:hover { background: #93afff; }
.btn-ghost { color: var(--fg); border-color: var(--border); background: transparent; }
.btn-ghost:hover { border-color: var(--accent-line); background: rgba(124,156,255,0.04); }
.btn .arrow { transition: transform 0.15s ease; }
.btn:hover .arrow { transform: translateX(2px); }

footer {
  border-top: 1px solid var(--border-soft);
  padding: 40px 0;
  margin-top: 80px;
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--fg-dim);
  letter-spacing: 0.02em;
}
footer .container {
  max-width: 1040px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
footer a { color: var(--fg-dim); }
footer a:hover { color: var(--accent); }

@media (max-width: 720px) {
  article.case-page { padding: 56px 0 24px; }
  .container { padding: 0 22px; }
}