/* CodingResearcher — site statique
   Reprend l'identité de l'ancien site (bleu pétrole, gris-vert, titres en Lobster, photo ronde)
   et y ajoute le « twist » : l'univers du labo (branches de code divergentes, cahier de labo,
   tracé de signal, section « Code availability »). */

:root {
  --petrol: #124E66;
  --petrol-deep: #0C3A4C;
  --petrol-ink: #0A2E3C;
  --mint: #D3D9D4;
  --slate: #748E92;
  --slate-dark: #50666D;
  --sky: #A3BFCC;
  --ink: #1D1E20;
  --paper: #F5F6F3;
  --white: #FFFFFF;
  --amber: #E0A458;
  --coral: #D07A6E;
  --sage: #8DB39E;

  --font-logo: "Lobster", cursive;          /* logo seulement : continuité avec l'ancien site */
  --font-display: "Newsreader", Georgia, "Times New Roman", serif; /* titres : la voix d'une revue scientifique */
  --font-body: "Lato", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  --radius: 14px;
  --maxw: 1180px;
  --measure: 64ch;
  --gutter: clamp(16px, 4vw, 40px);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
}

img { max-width: 100%; display: block; }
a { color: var(--petrol); text-underline-offset: 3px; }
a:hover { color: var(--petrol-deep); }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 var(--gutter); }

.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 16px; background: var(--white); padding: 8px 12px; z-index: 10; }

:focus-visible { outline: 3px solid var(--petrol-ink); outline-offset: 3px; border-radius: 4px; }
/* Sur les fonds bleus, un contour ambre (contraste ≥ 3:1 sur chaque fond) */
.site-header :focus-visible, .hero :focus-visible, .page-hero :focus-visible, section.dark :focus-visible,
.contact :focus-visible, .site-footer :focus-visible, .testimonial :focus-visible { outline-color: var(--amber); }

/* ---------- En-tête ---------- */
.site-header {
  background: var(--petrol);
  color: var(--mint);
}
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; padding-top: 18px; padding-bottom: 18px; flex-wrap: wrap;
}
.brand {
  font-family: var(--font-logo);
  font-size: 1.6rem;
  color: var(--mint);
  text-decoration: none;
  white-space: nowrap;
}
.brand:hover { color: var(--white); }
.nav { display: flex; gap: clamp(12px, 2.5vw, 32px); flex-wrap: wrap; }
.nav a {
  color: var(--sky);
  text-decoration: none;
  font-size: 0.98rem;
  padding: 8px 0;
  border-bottom: 2px solid transparent;
}
.nav a:hover { color: var(--mint); }
.nav a[aria-current="page"] { color: var(--white); border-bottom-color: var(--mint); }
.nav a.lang { font-family: var(--font-mono); font-size: .85rem; border: 1px solid var(--slate); border-radius: 6px; padding: 2px 8px; align-self: center; }
.nav a.lang:hover { border-color: var(--mint); }

/* ---------- Héros ---------- */
.hero {
  background: var(--petrol);
  color: var(--mint);
  padding: clamp(32px, 6vw, 72px) 0 clamp(40px, 7vw, 88px);
  overflow: hidden;
}
.hero .wrap {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: clamp(24px, 5vw, 64px);
  align-items: center;
}
.hero h1, .page-hero h1 {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(2.4rem, 5.8vw, 4.2rem);
  line-height: 1.05;
  letter-spacing: -.01em;
  text-wrap: balance;
  margin: 0 0 20px;
  color: var(--mint);
}
.kicker {
  display: block;
  font-style: normal;
  font-family: var(--font-mono);
  font-size: clamp(.8rem, 1.2vw, .92rem);
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--sky);
  margin-bottom: 14px;
  line-height: 1.4;
}
.hero .lead {
  line-height: 1.65;
  font-size: clamp(1.08rem, 1.6vw, 1.25rem);
  color: var(--white);
  max-width: 38em;
  margin: 0 0 28px;
}
.hero .portrait {
  justify-self: center;
  width: min(340px, 70vw);
  aspect-ratio: 1;
  border-radius: 50%;
  overflow: hidden;
  border: 6px solid var(--petrol-deep);
  box-shadow: 0 0 0 2px var(--slate);
}
.hero .portrait img { width: 100%; height: 100%; object-fit: cover; object-position: 50% 20%; }

.page-hero {
  background: var(--petrol);
  color: var(--mint);
  padding: clamp(32px, 4vw, 52px) 0 clamp(36px, 4.5vw, 60px);
}
.page-hero p { color: var(--white); max-width: var(--measure); font-size: 1.15rem; margin: 0; }

/* Branches divergentes qui se rejoignent : le motif signature */
.branches { width: 100%; max-width: 640px; height: auto; margin: 8px 0 26px; }
.branches .branch { fill: none; stroke-width: 3; stroke-linecap: round; }
.branches .trunk { fill: none; stroke: var(--mint); stroke-width: 4; stroke-linecap: round; }
.branches .node { stroke: var(--petrol); stroke-width: 3; }
.branches .label { font-family: var(--font-mono); font-size: 12px; fill: var(--sky); }
.branches .label-final { font-family: var(--font-mono); font-size: 12px; fill: var(--white); }
/* Animation d'entrée : l'état final est l'état par défaut, pour que le dessin reste visible
   si l'animation ne se joue pas (mouvement réduit, capture, navigateur qui la suspend). */
@media (prefers-reduced-motion: no-preference) {
  .branches .branch, .branches .trunk { stroke-dasharray: 700; animation: draw 2.4s ease-out; }
  .branches .trunk { animation-delay: 1.4s; animation-fill-mode: backwards; }
  .branches .fade { animation: fade .8s ease-out 2.6s backwards; }
}
@keyframes draw { from { stroke-dashoffset: 700; } to { stroke-dashoffset: 0; } }
@keyframes fade { from { opacity: 0; } to { opacity: 1; } }

/* ---------- Boutons ---------- */
.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 700;
  text-decoration: none;
  border: 2px solid transparent;
  transition: background .15s, color .15s;
}
.btn-light { background: var(--mint); color: var(--petrol-ink); }
.btn-light:hover { background: var(--white); color: var(--petrol-ink); }
.btn-ghost { border-color: var(--sky); color: var(--mint); margin-left: 8px; }
.btn-ghost:hover { background: var(--petrol-deep); color: var(--white); }
.btn-dark { background: var(--petrol); color: var(--white); }
.btn-dark:hover { background: var(--petrol-deep); color: var(--white); }

/* ---------- Tracé de signal (séparateur) ---------- */
.trace { display: block; width: 100%; height: 36px; background: var(--petrol); }
.trace path { fill: none; stroke: var(--slate); stroke-width: 1.5; }
.trace.on-paper { background: var(--paper); }
.trace.on-paper path { stroke: var(--sky); }

/* ---------- Sections ---------- */
section { padding: clamp(44px, 5.5vw, 76px) 0; }
section.alt { background: var(--white); }
section.dark { background: var(--petrol-deep); color: var(--mint); }
section.dark h2 { color: var(--mint); }
section.dark p, section.dark li { color: var(--white); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--slate-dark);
  margin: 0 0 14px;
}
section.dark .eyebrow { color: var(--sky); }
h2 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -.005em;
  text-wrap: balance;
  font-size: clamp(2rem, 3.8vw, 2.8rem);
  line-height: 1.2;
  color: var(--petrol);
  margin: 0 0 22px;
  max-width: 34ch;
}
h3 { font-size: 1.22rem; line-height: 1.35; margin: 0 0 14px; color: var(--petrol-ink); }
p { margin: 0 0 1em; }
section.dark h3 { color: var(--mint); }
.intro { max-width: none; font-size: 1.1rem; margin: 0 0 32px; color: #34393c; }
section.dark .intro { color: var(--white); }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(16px, 2vw, 24px); }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: clamp(16px, 2vw, 24px); }

.card {
  background: var(--paper);
  border: 1px solid var(--mint);
  border-radius: var(--radius);
  padding: clamp(20px, 2vw, 26px);
}
section.alt .card { background: var(--paper); }
section:not(.alt) .card { background: var(--white); }
section.dark .card { background: var(--petrol); border-color: var(--slate-dark); }
.card p:last-child { margin-bottom: 0; }

/* Déclencheurs : numérotés comme des expériences */
.trigger .num {
  font-family: var(--font-mono);
  font-size: .85rem;
  color: var(--slate-dark);
  display: block;
  margin-bottom: 10px;
}
.trigger .glyph { width: 56px; height: 40px; margin-bottom: 12px; }

/* Les trois garanties */
.pillars { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(20px, 3vw, 36px); }
.pillar { border-top: 3px solid var(--sky); padding-top: 16px; }
.pillar h3 { font-family: var(--font-display); font-style: italic; font-weight: 500; font-size: 1.7rem; color: var(--mint); }

/* Citation « Votre IA ou la mienne ? » */
.ai-split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(20px, 3vw, 32px); margin-top: 8px; }
.ai-col {
  background: var(--white);
  border: 1px solid var(--mint);
  border-radius: var(--radius);
  padding: clamp(22px, 2.6vw, 30px);
  min-width: 0;
}
.ai-col.poc { border-top: 4px solid var(--amber); }
.ai-col.solid { border-top: 4px solid var(--sage); }
.ai-col h3 { font-family: var(--font-mono); font-size: .9rem; letter-spacing: .04em; text-transform: uppercase; color: var(--slate-dark); margin: 0 0 16px; line-height: 1.5; }
.ai-col ul { margin: 0; padding-left: 20px; }
.ai-col li { margin-bottom: 12px; line-height: 1.55; }
.ai-col li:last-child { margin-bottom: 0; }
.ai-source { margin: 18px 0 0; padding-top: 14px; border-top: 1px solid var(--mint); font-size: .85rem; line-height: 1.55; color: var(--slate-dark); }
.confidentiality {
  margin: 28px 0 0;
  max-width: none;
  padding: 18px 22px;
  border-left: 3px solid var(--petrol);
  background: var(--white);
  border-radius: 0 10px 10px 0;
  color: #34393c;
  line-height: 1.7;
}
.confidentiality strong { display: block; color: var(--petrol-ink); margin-bottom: 4px; }
.pull {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  line-height: 1.25;
  color: var(--petrol);
  margin: 40px 0 0;
  max-width: 30em;
}

/* ---------- Cas clients façon résumé d'article ---------- */
.case {
  background: var(--white);
  border: 1px solid var(--mint);
  border-top: 6px solid var(--petrol);
  border-radius: var(--radius);
  padding: clamp(22px, 3vw, 36px);
  margin-bottom: clamp(20px, 2.5vw, 32px);
}
.case-meta {
  font-family: var(--font-mono);
  font-size: .85rem;
  letter-spacing: .03em;
  color: var(--slate-dark);
  margin: 0 0 10px;
}
.case h2 {
  font-family: var(--font-display);
  font-weight: 600;
  text-wrap: balance;
  font-size: clamp(1.6rem, 2.8vw, 2.1rem);
  line-height: 1.2;
  color: var(--petrol);
  margin: 0 0 18px;
  max-width: 40ch;
}
.case-label {
  display: block;
  font-family: var(--font-mono);
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--slate-dark);
  margin-bottom: 8px;
}
.case-body {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: clamp(20px, 3vw, 40px);
}
.case-body p { margin: 0; }
.case-question p {
  font-size: 1.12rem;
  line-height: 1.6;
  color: var(--petrol-ink);
  border-left: 3px solid var(--sky);
  padding-left: 18px;
}
.case-outcome {
  margin-top: 18px;
  background: var(--paper);
  border-radius: 10px;
  padding: 18px 22px;
}
.case-outcome p { margin: 0; font-weight: 700; color: var(--petrol-ink); }
.case-foot {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px 32px;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--mint);
  font-size: .95rem;
}
.case-foot p { margin: 0; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; list-style: none; }
.tags li { font-family: var(--font-mono); font-size: .78rem; background: var(--paper); border: 1px solid var(--mint); border-radius: 999px; padding: 3px 12px; }

.case-mini h3 { font-size: 1.1rem; }
.case-mini .meta { font-family: var(--font-mono); font-size: .78rem; color: var(--slate-dark); display: block; margin-bottom: 8px; }

/* Témoignage */
.testimonial {
  margin: 0;
  background: var(--petrol);
  color: var(--white);
  border-radius: var(--radius);
  padding: clamp(22px, 3vw, 34px);
  position: relative;
}
.testimonial { max-width: 900px; }
.testimonials { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(24px, 3vw, 40px); align-items: stretch; }
.testimonials .testimonial { max-width: none; }
.testimonials .testimonial blockquote { font-size: clamp(1.02rem, 1.4vw, 1.15rem); }
.testimonial-small { margin: 18px 0 0; padding: 22px 26px; }
.testimonial-small blockquote { font-size: 1.02rem; }
.testimonial-small::before { font-size: 4rem; }
.testimonial blockquote { margin: 0; font-size: clamp(1.12rem, 1.9vw, 1.4rem); line-height: 1.6; }
.testimonial blockquote p { margin: 0 0 14px; }
.testimonial figcaption { color: var(--mint); font-family: var(--font-mono); font-size: .9rem; margin-top: 16px; }
.testimonial::before {
  content: "“"; content: "“" / ""; font-family: var(--font-display); font-size: 6rem; line-height: 1;
  color: var(--slate); position: absolute; top: 4px; right: 22px;
}

/* Encadré « Code availability » façon article */
.code-availability {
  font-family: var(--font-mono);
  font-size: .9rem;
  border: 1px dashed var(--slate);
  border-radius: 10px;
  padding: 16px 18px;
  background: var(--paper);
}
.code-availability strong { display: block; margin-bottom: 6px; letter-spacing: .04em; }

/* Liste de vérification */
.checklist { list-style: none; padding: 0; margin: 0; counter-reset: step; }
.checklist { max-width: 820px; }
.checklist li {
  counter-increment: step;
  position: relative;
  padding: 14px 0 14px 56px;
  border-bottom: 1px solid var(--mint);
}
.checklist li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute; left: 0; top: 14px;
  font-family: var(--font-mono); color: var(--petrol); font-weight: 600;
}
.checklist strong { display: block; }

/* Tableau des politiques */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; background: var(--white); border-radius: var(--radius); overflow: hidden; }
th, td { text-align: left; padding: 16px 18px; border-bottom: 1px solid var(--mint); vertical-align: top; }
th { font-family: var(--font-mono); font-size: .8rem; text-transform: uppercase; letter-spacing: .05em; color: var(--slate-dark); background: var(--paper); }

/* Étapes */
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: clamp(16px, 2vw, 24px); counter-reset: s; }
.steps .card { position: relative; }
.steps .card::before {
  counter-increment: s; content: counter(s);
  font-family: var(--font-display); font-style: italic; font-size: 2.2rem; color: var(--sky);
  display: block; line-height: 1; margin-bottom: 8px;
}

/* À propos */
.about-grid { display: grid; grid-template-columns: 280px 1fr; gap: clamp(24px, 4vw, 56px); align-items: start; }
.about-grid .portrait { border-radius: 50%; overflow: hidden; aspect-ratio: 1; border: 6px solid var(--mint); }
.about-grid .portrait img { width: 100%; height: 100%; object-fit: cover; object-position: 50% 20%; }
.timeline { list-style: none; margin: 0; padding: 0; border-left: 2px solid var(--sky); }
.timeline li { position: relative; padding: 0 0 18px 26px; }
.timeline li::before { content: ""; position: absolute; left: -7px; top: 8px; width: 12px; height: 12px; border-radius: 50%; background: var(--petrol); border: 2px solid var(--paper); }
.timeline .when { font-family: var(--font-mono); font-size: .82rem; color: var(--slate-dark); display: block; }

/* ---------- Contact ---------- */
.contact {
  background: var(--petrol);
  color: var(--mint);
}
.contact h2 { color: var(--mint); }
.contact p { color: var(--white); }
.contact .wrap { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: clamp(24px, 5vw, 64px); align-items: start; }
.contact .hint { background: var(--petrol-deep); border-radius: var(--radius); padding: 22px 24px; }
.contact .hint h3 { color: var(--mint); font-family: var(--font-mono); font-size: .9rem; letter-spacing: .05em; text-transform: uppercase; }
.contact .hint { padding: 22px 26px; }
.contact .hint ul { margin: 0; padding-left: 20px; color: var(--white); }
.contact .hint li { margin-bottom: 6px; }
.contact .email { font-family: var(--font-mono); font-size: clamp(1rem, 2.4vw, 1.3rem); color: var(--white); word-break: break-all; }

/* ---------- Pied de page ---------- */
.site-footer { background: var(--petrol-ink); color: var(--sky); padding: 32px 0; font-size: .92rem; }
.site-footer .wrap { display: flex; justify-content: space-between; gap: 18px; flex-wrap: wrap; align-items: center; }
.site-footer a { color: var(--mint); }
.site-footer .links { display: flex; gap: 18px; flex-wrap: wrap; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .hero .wrap, .contact .wrap, .about-grid { grid-template-columns: 1fr; }
  .hero .portrait { order: -1; width: min(220px, 60vw); }
  .grid-3, .pillars { grid-template-columns: 1fr 1fr; }
  .case-body { grid-template-columns: 1fr; }
  .testimonials { grid-template-columns: 1fr; }
  .about-grid .portrait { max-width: 220px; }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .grid-3, .grid-2, .pillars, .steps, .ai-split { grid-template-columns: 1fr; }
  .btn-ghost { margin-left: 0; margin-top: 10px; }
}

/* Titres de section utilisés comme simples surtitres (témoignages) */
h2.eyebrow { max-width: none; font-family: var(--font-mono); font-weight: 400; font-size: .82rem; letter-spacing: .08em; color: var(--slate-dark); }

/* Témoignages : texte centré dans la zone bleue */
.testimonial {
  display: flex;
  flex-direction: column;
  justify-content: center;
  text-align: center;
  padding-top: clamp(56px, 6vw, 72px);
}
.testimonial blockquote p { margin-left: auto; margin-right: auto; max-width: 60ch; }
.testimonial::before { left: 50%; right: auto; transform: translateX(-50%); top: 2px; }
.testimonial-small { padding-top: 52px; }

/* Guillemet dans le flux, juste au-dessus du texte (il suit le centrage vertical) */
.testimonial { padding-top: clamp(26px, 3vw, 36px); }
.testimonial::before {
  position: static;
  transform: none;
  display: block;
  font-size: 4.5rem;
  line-height: .7;
  height: .45em;
  margin: 0 auto 10px;
}
.testimonial-small { padding-top: 24px; }
.testimonial-small::before { font-size: 3.5rem; }


/* ---------- Blog ---------- */
.blog-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: clamp(16px, 2vw, 24px); }
.blog-card h2 { font-size: 1.45rem; max-width: none; margin: 8px 0 12px; }
.blog-card h2 a { color: var(--petrol); text-decoration: none; }
.blog-card h2 a:hover { text-decoration: underline; }
.blog-card .meta { font-family: var(--font-mono); font-size: .8rem; color: var(--slate-dark); }
.article {
  max-width: 820px;
  margin: 0 auto;
  padding: clamp(40px, 5vw, 64px) var(--gutter);
}
.article p, .article li { font-size: 1.08rem; line-height: 1.75; }
.article p { margin: 0 0 1.2em; }
.article h2 { font-size: clamp(1.5rem, 2.6vw, 1.9rem); margin: 1.8em 0 .6em; max-width: none; }
.article ul { padding-left: 22px; margin: 0 0 1.2em; }
.article li { margin-bottom: .6em; }
.article-figure { margin: 2em 0; }
.article-figure img { width: 100%; height: auto; border-radius: 10px; border: 1px solid var(--mint); background: var(--white); }
.article-figure.narrow { max-width: 460px; margin-left: auto; margin-right: auto; }
.article-figure figcaption { font-size: .9rem; color: var(--slate-dark); margin-top: 8px; }
.personas { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin: 1.5em 0; }
.personas p { background: var(--white); border: 1px solid var(--mint); border-radius: 12px; padding: 18px 20px; margin: 0; font-size: 1rem; }
.persona-name { display: block; font-family: var(--font-mono); font-size: .8rem; letter-spacing: .08em; text-transform: uppercase; color: var(--slate-dark); margin-bottom: 6px; }
.refs { font-size: .95rem !important; color: var(--slate-dark); }
.article-back { margin-top: 2.5em !important; font-family: var(--font-mono); font-size: .9rem !important; }
.page-hero .kicker a { text-decoration: underline; text-underline-offset: 3px; }
@media (max-width: 640px) { .blog-list, .personas { grid-template-columns: 1fr; } }
p.kicker { margin: 0 0 18px; }