/* Gabarit des études de cas — s'appuie sur instudy-brand.css */
.study { background: var(--marble); }
.s-hero { margin: 16px; border-radius: 18px; padding: 72px 56px 56px; color: var(--ink); }
.t-slate .s-hero { background: linear-gradient(140deg, #2c3f55 0%, #4f6886 100%); color: #fff; --focus: #fff; }
.t-mist .s-hero { background: radial-gradient(120% 90% at 80% 0%, #eef1f4 0%, #cfd8e2 100%); }
.t-night .s-hero { background: radial-gradient(90% 80% at 100% 100%, rgba(143,169,196,.28), transparent 60%), #1c2330; color: var(--marble); --focus: var(--accent-light); }
.t-stone .s-hero { background: linear-gradient(160deg, #e7e4dc 0%, #cfcbc1 100%); }
.t-stone-light .s-hero { background: linear-gradient(160deg, #f1efe9 0%, #dedad1 100%); }
.s-hero .eyebrow { color: inherit; }
.s-hero h1 { font-size: clamp(34px, 4.6vw, 68px); max-width: 20ch; margin: 18px 0 40px; }
.t-slate .s-hero h1 .accent { color: #fff; }
.t-night .s-hero h1 .accent { color: var(--accent-light); }
.kfs { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid currentColor; }
.kf { padding: 20px 24px 0 0; display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.kf-v { font: 500 clamp(36px, 4vw, 52px)/1 var(--sans); letter-spacing: -.04em; overflow-wrap: anywhere; }
.kf-l { font-size: 15px; line-height: 1.4; }
.s-hero .btn { margin-top: 36px; }
.t-slate .s-hero .btn-primary, .t-night .s-hero .btn-primary { background: var(--marble); color: var(--ink); }
.s-block { max-width: 880px; margin: 0 auto; padding: 64px 24px; border-bottom: 1px solid var(--line); }
.s-block .lead { font: 400 clamp(19px, 1.9vw, 24px)/1.5 var(--sans); letter-spacing: -.01em; margin-top: 16px; color: var(--ink); }
.insight-row { display: grid; grid-template-columns: 150px minmax(0, 1fr); gap: 32px; padding: 32px 0; border-top: 1px solid var(--line); }
.insight-row:first-of-type { margin-top: 24px; }
.ins-fig { font: 500 44px/1 var(--sans); letter-spacing: -.04em; color: var(--accent); overflow-wrap: anywhere; }
.ins-n { font: 400 11px/1 var(--mono); letter-spacing: .08em; color: var(--muted); }
.ins-body h3 { font-size: 26px; line-height: 1.15; margin: 10px 0 10px; }
.ins-body p { font-size: 17px; line-height: 1.55; color: #24272c; }
.ins-body blockquote { margin: 18px 0 0; padding-left: 16px; border-left: 2px solid var(--accent); font: italic 400 21px/1.4 var(--display); }
.ins-body cite { display: block; margin-top: 6px; font: normal 400 12px var(--mono); color: var(--muted); }
.ins-body video { display: block; width: 100%; border-radius: 12px; margin-top: 16px; background: var(--ink); }
.impact-figs { display: flex; flex-wrap: wrap; gap: 40px; margin-top: 16px; }
.impact-figs .kf-v { color: var(--accent); font-size: clamp(44px, 6vw, 72px); }
.src { display: block; margin-top: 12px; font: 400 12px/1.5 var(--mono); color: var(--muted); }
details summary { cursor: pointer; font: 500 20px var(--sans); letter-spacing: -.01em; list-style: none; }
details summary::-webkit-details-marker { display: none; }
details summary::after { content: " +"; color: var(--accent); }
details[open] summary::after { content: " −"; }
.det { margin-top: 24px; }
.det dl { display: grid; grid-template-columns: 140px 1fr; gap: 10px 20px; margin: 0; }
.det dt { font: 400 12px/1.8 var(--mono); text-transform: uppercase; letter-spacing: .06em; color: var(--muted); }
.det dd { margin: 0; font-size: 16px; }
.det h3 { font-size: 20px; margin: 28px 0 10px; }
.det ol, .det ul { padding-left: 20px; margin: 0; }
.det li { margin: 6px 0; font-size: 16px; }
.sat { margin-top: 16px; padding: 14px 16px; background: var(--stone); border-radius: 10px; font-size: 15px; }
.s-end { margin: 16px; border-radius: 18px; background: var(--ink); color: var(--marble); padding: 64px 56px; display: flex; flex-wrap: wrap; justify-content: space-between; align-items: flex-end; gap: 32px; --focus: var(--accent-light); }
.s-end h2 { font-size: clamp(28px, 3.2vw, 46px); max-width: 22ch; margin-bottom: 24px; }
.s-end .btn-primary { background: var(--marble); color: var(--ink); }
.s-end .links { display: flex; flex-direction: column; gap: 12px; font-size: 16px; }
.s-end a { color: var(--marble); }
@media (max-width: 800px) {
  .s-hero, .s-end { padding: 40px 22px; }
  .kfs { grid-template-columns: 1fr; }
  .kf { padding-right: 0; }
  .insight-row { grid-template-columns: 1fr; gap: 8px; }
  .det dl { grid-template-columns: 1fr; gap: 4px; }
  .impact-figs { flex-direction: column; gap: 16px; }
}