/* ==========================================================================
   Études de cas — gabarit premium Pulse IA (sans éléments du template)
   Palette : noir #0F1216, crème #F6F4EE, orange #FF4B36
   ========================================================================== */

.cs {
  --bg: #0f1216;
  --ink: #14171a;
  --cream: #f6f4ee;
  --muted: #5b6068;
  --line: rgba(20, 23, 26, 0.1);
  --orange: #ff4b36;
  --orange-deep: #d93a26;
  --serif: "Mona Sans Narrow", Impact, sans-serif;
  --sans: "Mona Sans", Arial, sans-serif;
  --mono: "DM Mono", ui-monospace, monospace;
  margin: 0;
  background: var(--cream);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
.cs *, .cs *::before, .cs *::after { box-sizing: border-box; }
.cs img { display: block; max-width: 100%; height: auto; }
.cs a { color: inherit; }
.cs figure { margin: 0; }
.cs-wrap { width: min(1200px, 100% - 2.5rem); margin-inline: auto; }

.cs-skip { position: absolute; left: -999px; top: 0; }
.cs-skip:focus { left: 1rem; top: 1rem; z-index: 100; background: #fff; padding: .5rem 1rem; }

/* ---------- En-tête ---------- */
.cs-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: 1rem clamp(1.25rem, 3vw, 2.5rem);
  background: rgba(15, 18, 22, 0.86);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  color: #fff;
}
.cs-logo { display: inline-flex; align-items: center; gap: .6rem; text-decoration: none; font-weight: 600; font-size: 1.25rem; letter-spacing: -0.01em; }
.cs-logo svg { width: 34px; height: 26px; fill: none; stroke: var(--orange); stroke-width: 4; stroke-linecap: round; stroke-linejoin: round; filter: drop-shadow(0 0 6px rgba(255, 75, 54, .5)); }
.cs-logo em { font-style: normal; color: var(--orange); }
.cs-logo--dark { color: var(--ink); }
.cs-nav { display: flex; gap: 1.75rem; margin-left: auto; }
.cs-nav a { text-decoration: none; font-size: .95rem; color: #c7cbd1; transition: color .2s; }
.cs-nav a:hover { color: #fff; }
@media (max-width: 860px) { .cs-nav { display: none; } .cs-header .cs-btn { margin-left: auto; } }

/* ---------- Boutons ---------- */
.cs-btn {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  padding: 1.05rem 1.6rem;
  border-radius: 999px;
  background: #fff;
  color: var(--ink) !important;
  font-weight: 600;
  font-size: .95rem;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: .02em;
  box-shadow: 0 0 0 3px var(--orange), 0 0 28px rgba(255, 75, 54, .4);
  transition: box-shadow .25s, transform .25s;
}
.cs-btn:hover { box-shadow: 0 0 0 3px var(--orange), 0 0 42px rgba(255, 75, 54, .65); transform: translateY(-1px); }
.cs-btn--small { padding: .7rem 1.1rem; font-size: .78rem; box-shadow: 0 0 0 2px var(--orange); }
@media (max-width: 480px) { .cs-btn--small { padding: .6rem .8rem; font-size: .7rem; } }

/* ---------- Textes ---------- */
.cs-eyebrow, .cs-kicker {
  margin: 0 0 1.25rem;
  font-family: var(--mono);
  font-size: .78rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--orange-deep);
}
.cs-title, .cs-h2, .cs-h3, .cs-cta__title, .cs-next__title {
  font-family: var(--serif);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: -0.01em;
  line-height: 1.02;
  margin: 0;
}
.cs-h2 { font-size: clamp(2rem, 4vw, 3.25rem); max-width: 18ch; }
.cs-h2--wide { max-width: 24ch; }
.cs-h3 { font-size: clamp(1.6rem, 2.6vw, 2.25rem); margin-bottom: 1rem; }
.cs-prose p { margin: 0 0 1rem; color: var(--muted); }
.cs-prose em { color: var(--ink); }
.cs-list { margin: 0; padding: 0; list-style: none; display: grid; gap: 1rem; }
.cs-list li { padding-left: 1.4rem; position: relative; color: var(--muted); }
.cs-list li::before { content: ""; position: absolute; left: 0; top: .6em; width: 8px; height: 8px; border-radius: 50%; background: var(--orange); }
.cs-list strong { color: var(--ink); }

/* ---------- Hero ---------- */
.cs-hero { background: var(--bg); color: #fff; padding: clamp(4rem, 9vw, 7rem) 0 0; overflow: hidden; }
.cs-hero .cs-eyebrow { color: var(--orange); }
.cs-title { font-size: clamp(2.6rem, 6.4vw, 5.6rem); max-width: 16ch; }
.cs-title span { color: var(--orange); text-shadow: 0 0 30px rgba(255, 75, 54, .25); }
.cs-lead { margin: 2rem 0 0; max-width: 46rem; color: #c7cbd1; font-size: clamp(1.05rem, 1.4vw, 1.2rem); line-height: 1.65; }
.cs-meta {
  margin: 3rem 0 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, .12);
}
.cs-meta dt { font-family: var(--mono); font-size: .72rem; letter-spacing: .1em; text-transform: uppercase; color: #8b929c; margin-bottom: .35rem; }
.cs-meta dd { margin: 0; font-size: .95rem; color: #fff; }
.cs-meta a { text-decoration: none; border-bottom: 1px solid var(--orange); }
.cs-meta a:hover { color: var(--orange); }
@media (max-width: 760px) { .cs-meta { grid-template-columns: 1fr 1fr; } }
.cs-hero__media {
  margin-top: clamp(3rem, 6vw, 5rem);
  border-radius: 1.25rem 1.25rem 0 0;
  overflow: hidden;
  box-shadow: 0 0 0 1px rgba(255, 75, 54, .35), 0 -20px 80px rgba(255, 75, 54, .12);
}

/* ---------- Sections ---------- */
.cs-section { padding: clamp(4.5rem, 9vw, 8rem) 0; }
.cs-section--dark { background: var(--bg); color: #fff; }
.cs-section--dark .cs-kicker { color: var(--orange); }
.cs-section--warm { background: #ece8de; }
.cs-split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 6vw, 6rem); align-items: start; }
@media (max-width: 860px) { .cs-split { grid-template-columns: 1fr; } }

/* Avant / après */
.cs-compare { margin-top: 3rem; display: grid; grid-template-columns: 1fr 1.25fr; gap: 1.5rem; align-items: start; }
@media (max-width: 860px) { .cs-compare { grid-template-columns: 1fr; } }
.cs-compare__item { position: relative; }
.cs-compare__item img { border-radius: .9rem; filter: grayscale(.35) brightness(.85); }
.cs-compare__item.is-after img { filter: none; box-shadow: 0 0 0 1.5px var(--orange), 0 30px 80px rgba(0, 0, 0, .5); }
.cs-compare figcaption { margin-top: 1rem; color: #c7cbd1; font-size: .95rem; }
.cs-tag {
  position: absolute; top: .9rem; left: .9rem; z-index: 2;
  padding: .35rem .75rem; border-radius: 999px;
  font-family: var(--mono); font-size: .7rem; letter-spacing: .1em; text-transform: uppercase;
  background: rgba(15, 18, 22, .8); color: #c7cbd1; border: 1px solid rgba(255, 255, 255, .2);
}
.cs-tag--accent { background: var(--orange); color: var(--ink); border-color: var(--orange); }

/* Décisions */
.cs-decision { padding-top: clamp(3rem, 6vw, 5rem); }
.cs-decision__grid {
  display: grid;
  grid-template-columns: 1fr 1.35fr;
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
  padding-top: clamp(3rem, 6vw, 5rem);
  border-top: 1px solid var(--line);
}
@media (max-width: 960px) { .cs-decision__grid { grid-template-columns: 1fr; } }
.cs-decision__text p { color: var(--muted); margin: 0 0 1rem; }
.cs-num { display: inline-block; margin-bottom: 1.25rem; font-family: var(--mono); font-size: .8rem; color: var(--orange-deep); letter-spacing: .1em; }
.cs-shot { border-radius: 1rem; overflow: hidden; box-shadow: 0 30px 70px rgba(20, 23, 26, .14), 0 0 0 1px var(--line); }
.cs-quote { margin-top: 1.75rem; display: grid; gap: .75rem; }
.cs-quote p { margin: 0 !important; padding: 1rem 1.25rem; border-radius: .75rem; font-size: 1.05rem; }
.cs-quote span { display: block; font-family: var(--mono); font-size: .7rem; letter-spacing: .1em; text-transform: uppercase; margin-bottom: .3rem; }
.cs-quote__before { background: rgba(20, 23, 26, .05); color: var(--muted) !important; text-decoration: line-through; text-decoration-color: rgba(255, 75, 54, .7); }
.cs-quote__before span { text-decoration: none; display: block; }
.cs-quote__after { background: var(--bg); color: #fff !important; box-shadow: 0 0 0 1.5px var(--orange); }
.cs-quote__after span { color: var(--orange); }
.cs-decision__proof { padding: 2rem; border-radius: 1rem; background: #fff; box-shadow: 0 0 0 1px var(--line); }
.cs-proof-title { margin: 0 0 1rem; font-family: var(--mono); font-size: .75rem; letter-spacing: .1em; text-transform: uppercase; color: var(--orange-deep); }
.cs-checks { margin: 0; padding: 0; list-style: none; display: grid; gap: 1rem; }
.cs-checks li { padding-left: 2rem; position: relative; color: var(--ink); }
.cs-checks li::before {
  content: ""; position: absolute; left: 0; top: .2em; width: 1.2rem; height: 1.2rem; border-radius: 50%;
  background: var(--orange) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2314171a' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 12.5 4 4L18 8'/%3E%3C/svg%3E") center / 75% no-repeat;
}
/* Décision 04 mise en avant */
.cs-decision.is-highlight .cs-decision__grid {
  padding: clamp(2rem, 4vw, 3.5rem);
  border: 0;
  border-radius: 1.5rem;
  background: var(--bg);
  color: #fff;
  box-shadow: 0 0 0 1.5px rgba(255, 75, 54, .5), 0 0 60px rgba(255, 75, 54, .12);
}
.cs-decision.is-highlight .cs-decision__text p { color: #c7cbd1; }
.cs-decision.is-highlight .cs-num { color: var(--orange); }
.cs-fields { margin: 1.5rem 0 0; padding: 0; list-style: none; display: grid; gap: .6rem; }
.cs-fields li { padding: .7rem 1rem; border-radius: .6rem; background: rgba(255, 255, 255, .05); border: 1px solid rgba(255, 255, 255, .08); color: #c7cbd1; font-size: .95rem; }
.cs-fields strong { color: #fff; font-weight: 600; }

/* Direction artistique */
.cs-art { display: grid; grid-template-columns: 1.2fr .8fr; gap: clamp(2rem, 6vw, 6rem); align-items: center; }
@media (max-width: 860px) { .cs-art { grid-template-columns: 1fr; } }
.cs-art .cs-prose { margin: 1.5rem 0 0; color: var(--muted); max-width: 34rem; }
.cs-tags { margin: 1.75rem 0 0; padding: 0; list-style: none; display: flex; flex-wrap: wrap; gap: .5rem; }
.cs-tags li { padding: .45rem .9rem; border-radius: 999px; background: #fff; box-shadow: 0 0 0 1px var(--line); font-size: .85rem; }
.cs-phone {
  justify-self: center;
  width: min(300px, 80%);
  padding: 10px;
  border-radius: 2.4rem;
  background: var(--bg);
  box-shadow: 0 0 0 1.5px rgba(255, 75, 54, .45), 0 40px 80px rgba(20, 23, 26, .3);
}
.cs-phone img { border-radius: 1.9rem; }

/* Livrables */
.cs-deliver { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--line); }
@media (max-width: 760px) { .cs-deliver { grid-template-columns: 1fr; } }
.cs-deliver div { display: flex; gap: 1rem; align-items: baseline; padding: 1.5rem 1.5rem 1.5rem 0; border-bottom: 1px solid var(--line); }
.cs-deliver span { font-family: var(--mono); font-size: .8rem; color: var(--orange-deep); }
.cs-deliver p { margin: 0; font-size: 1.1rem; font-weight: 500; }

/* Projet suivant */
.cs-next { padding: 0 0 clamp(4rem, 8vw, 6rem); }
.cs-next__grid { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: flex-end; gap: 1.5rem; padding-top: 2.5rem; border-top: 1px solid var(--line); }
.cs-next__link { text-decoration: none; display: grid; }
.cs-next__link .cs-kicker { margin-bottom: .5rem; }
.cs-next__title { font-size: clamp(2rem, 5vw, 4rem); transition: color .2s; }
.cs-next__link:hover .cs-next__title { color: var(--orange-deep); }
.cs-next__back { text-decoration: none; font-weight: 600; border-bottom: 2px solid var(--orange); padding-bottom: 2px; }

/* CTA */
.cs-cta { padding: 0 10px 10px; }
.cs-cta__panel {
  border-radius: 2rem;
  padding: clamp(4rem, 9vw, 7rem) 1.5rem;
  text-align: center;
  color: #fff;
  background:
    radial-gradient(ellipse 60% 70% at 50% 40%, rgba(255, 75, 54, .16) 0%, rgba(255, 75, 54, 0) 60%),
    radial-gradient(ellipse 80% 80% at 50% 45%, #1a1f26 0%, #0f1216 60%, #07090b 100%);
}
.cs-cta .cs-eyebrow { color: var(--orange); }
.cs-cta__title { font-size: clamp(2.25rem, 6vw, 4.5rem); max-width: 16ch; margin: 0 auto; }
.cs-cta__title span { color: var(--orange); }
.cs-cta__text { margin: 1.5rem auto 2.25rem; max-width: 34rem; color: #c7cbd1; }
.cs-cta__text strong { color: #fff; }
.cs-cta__phone { display: block; margin-top: 1.25rem; color: #c7cbd1; text-decoration: none; font-size: .95rem; }
.cs-cta__phone span { color: #fff; font-weight: 600; border-bottom: 1px solid var(--orange); }

/* Pied de page */
.cs-footer { padding: 3.5rem 0 2rem; }
.cs-footer__grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 2.5rem 3rem; }
@media (max-width: 760px) { .cs-footer__grid { grid-template-columns: 1fr 1fr; } .cs-footer__grid > :first-child { grid-column: 1 / -1; } }
.cs-footer p { color: var(--muted); max-width: 26rem; margin: 1rem 0 0; }
.cs-footer nav, .cs-footer__grid > div:last-child { display: flex; flex-direction: column; gap: .7rem; }
.cs-footer__title { margin: 0 0 .25rem !important; font-family: var(--mono); font-size: .72rem; letter-spacing: .1em; text-transform: uppercase; color: #8b8b8b !important; }
.cs-footer a { text-decoration: none; font-size: .95rem; font-weight: 500; }
.cs-footer a:hover { color: var(--orange-deep); }
.cs-footer__legal { margin-top: 2.5rem !important; padding-top: 1.5rem; border-top: 1px solid var(--line); font-size: .85rem; color: #8b8b8b !important; max-width: none !important; }

/* Apparition douce (js/reveal.js) */
.is-reveal-ready { opacity: 0; transform: translateY(24px); transition: opacity .8s cubic-bezier(.22, 1, .36, 1), transform .8s cubic-bezier(.22, 1, .36, 1); }
.is-reveal-ready.is-revealed { opacity: 1; transform: none; }

/* Centrage (les règles génériques figure/p remettaient les marges à 0) */
.cs .cs-hero__media { margin: clamp(3rem, 6vw, 5rem) auto 0; }
.cs .cs-footer__legal { margin: 2.5rem auto 0; }
/* Liste de champs sur fond clair */
.cs-decision:not(.is-highlight) .cs-fields li { background: #fff; border-color: var(--line); color: var(--muted); }
.cs-decision:not(.is-highlight) .cs-fields strong { color: var(--ink); }

/* Plusieurs captures dans une même décision */
.cs-media { display: grid; gap: 1rem; }
.cs-caption { margin: .25rem 0 0; font-family: var(--mono); font-size: .72rem; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.cs-decision.is-highlight .cs-caption { color: #8b929c; }
.cs-decision.is-highlight .cs-decision__proof { background: rgba(255, 255, 255, .04); box-shadow: 0 0 0 1px rgba(255, 255, 255, .1); }
.cs-decision.is-highlight .cs-checks li { color: #fff; }
.cs-decision.is-highlight .cs-proof-title { color: var(--orange); }
/* Mention d'honnêteté sous le bilan */
.cs-note { margin: 2rem 0 0; max-width: 40rem; font-size: .9rem; color: var(--muted); font-style: italic; }