/* ==========================================================================
   AtlaCyber — design system
   Typographie : Source Serif 4 (titres) / Inter (corps)
   Espacements : échelle 8px (4px en dessous de 16)
   ========================================================================== */

:root{
  --bg:#0c1110;
  --surface:#111815;
  --surface-raised:#151d1a;
  --ink:#eef1f0;
  --ink-soft:#cfd6d3;
  --muted:#9faaa4;
  --line:rgba(255,255,255,.09);
  --line-strong:rgba(255,255,255,.16);
  --accent:#45b48c;
  --accent-strong:#0fa36f;
  --accent-ink:#06120d;
  --serif:"Source Serif 4",Georgia,"Times New Roman",serif;
  --sans:"Inter",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
  --radius:8px;
  --radius-s:6px;
  --container:1120px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--sans);
  font-size:1rem;
  line-height:1.65;
  color:var(--ink);
  background:var(--bg);
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}

.skip-link{position:absolute;left:-999px;top:auto;width:1px;height:1px;overflow:hidden}
.skip-link:focus{left:16px;top:16px;width:auto;height:auto;background:var(--ink);color:var(--bg);padding:12px 16px;z-index:20;border-radius:var(--radius-s)}

/* --------------------------------------------------------------------------
   Header / navigation
   -------------------------------------------------------------------------- */
.header{
  position:sticky;
  top:0;
  z-index:10;
  background:rgba(12,17,16,.92);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px 0}
.brand{display:flex;align-items:center;gap:12px}
.brand-logo{width:36px;height:36px;border-radius:var(--radius-s)}
.brand-name{font-family:var(--serif);font-size:1.0625rem;font-weight:600;line-height:1.2}
.brand-tag{font-size:.6875rem;color:var(--muted);font-weight:500;text-transform:uppercase;letter-spacing:.12em}

.nav{display:flex;align-items:center;gap:4px}
.nav a{font-size:.875rem;font-weight:500;color:var(--muted);padding:8px 10px}
.nav a:hover{color:var(--ink)}
.nav a[aria-current="page"]{color:var(--ink);text-decoration:underline;text-decoration-color:var(--accent);text-underline-offset:6px}
.header-cta{display:flex;align-items:center}
.mobile-toggle{display:none;border:1px solid var(--line-strong);background:transparent;border-radius:var(--radius-s);padding:8px 12px;font:500 .875rem var(--sans);color:var(--ink);cursor:pointer}

/* --------------------------------------------------------------------------
   Boutons et liens
   -------------------------------------------------------------------------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border:1px solid transparent;
  border-radius:var(--radius-s);
  padding:12px 20px;
  font:500 .9375rem/1.2 var(--sans);
  cursor:pointer;
  transition:background .15s ease,border-color .15s ease,color .15s ease;
}
.btn-primary{background:var(--accent-strong);color:var(--accent-ink)}
.btn-primary:hover{background:#12b57d}
.btn-secondary{border-color:var(--line-strong);color:var(--ink);background:transparent}
.btn-secondary:hover{border-color:var(--accent)}
.text-link{color:var(--accent);font-weight:500;font-size:.9375rem}
.text-link:hover{text-decoration:underline;text-underline-offset:4px}

.eyebrow{
  display:inline-block;
  color:var(--accent);
  font-weight:600;
  font-size:.75rem;
  text-transform:uppercase;
  letter-spacing:.12em;
}

/* --------------------------------------------------------------------------
   Hero (accueil)
   -------------------------------------------------------------------------- */
.hero{padding:64px 0 56px;border-bottom:1px solid var(--line)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero-copy h1{
  font-family:var(--serif);
  font-size:clamp(2.125rem,3.5vw,2.875rem);
  font-weight:600;
  line-height:1.15;
  letter-spacing:-.01em;
  margin:16px 0 0;
}
.hero-copy p{font-size:1.0625rem;color:var(--muted);max-width:540px;margin:16px 0 0}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:32px}

/* Panneau "évaluation de maturité" */
.hero-visual{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.maturity-head{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-bottom:16px;border-bottom:1px solid var(--line)}
.maturity-title{font-size:.8125rem;font-weight:600}
.maturity-badge{font-size:.6875rem;font-weight:500;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);border:1px solid var(--line-strong);border-radius:4px;padding:2px 8px}
.maturity-rows{list-style:none;margin:20px 0;padding:0;display:grid;gap:16px}
.maturity-rows li{display:grid;grid-template-columns:168px 1fr 44px;gap:12px;align-items:center}
.m-label{font-size:.8125rem;color:var(--ink-soft)}
.m-bar{position:relative;height:6px;background:rgba(255,255,255,.07);border-radius:3px}
.m-bar i{position:absolute;top:0;bottom:0;left:0;background:var(--accent-strong);border-radius:3px}
.m-bar b{position:absolute;top:-3px;bottom:-3px;width:2px;background:var(--ink-soft);border-radius:1px}
.m-score{font-size:.8125rem;font-variant-numeric:tabular-nums;text-align:right}
.m-score em{font-style:normal;font-size:.6875rem;color:var(--muted)}
.maturity-legend{display:flex;gap:20px;padding-top:16px;border-top:1px solid var(--line);font-size:.75rem;color:var(--muted)}
.maturity-legend span{display:inline-flex;align-items:center;gap:8px}
.dot{width:8px;height:8px;border-radius:2px}
.dot-now{background:var(--accent-strong)}
.dot-target{background:var(--ink-soft)}

/* --------------------------------------------------------------------------
   Sections
   -------------------------------------------------------------------------- */
.section{padding:56px 0}
.section-muted{background:rgba(255,255,255,.02);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-title{display:grid;gap:8px;margin-bottom:32px;max-width:720px}
.section-title > span{color:var(--accent);font-weight:600;font-size:.75rem;text-transform:uppercase;letter-spacing:.12em}
.section-title h2{
  font-family:var(--serif);
  font-size:clamp(1.5rem,2.4vw,1.875rem);
  font-weight:600;
  line-height:1.25;
  letter-spacing:-.005em;
  margin:0;
}
.section-title p{margin:0;color:var(--muted)}
.section-title .text-link{justify-self:start}

.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.grid-5{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}

/* --------------------------------------------------------------------------
   Cards
   -------------------------------------------------------------------------- */
.card,.mini-card,.article-card,.service-detail,.contact-panel,.principles,.partnership-box{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
}
.card{padding:24px}
.card-icon{display:flex;align-items:center;justify-content:center;width:40px;height:40px;border:1px solid var(--line-strong);border-radius:var(--radius-s);color:var(--accent);margin-bottom:16px}
.card-icon svg{width:20px;height:20px}
.card h3,.mini-card h3{margin:0 0 8px;font-size:1rem;font-weight:600}
.card p,.mini-card p,.article-card p{margin:0;font-size:.9375rem;color:var(--muted)}
.mini-card{padding:20px}

/* --------------------------------------------------------------------------
   Méthode (étapes numérotées)
   -------------------------------------------------------------------------- */
.method{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--surface)}
.step{padding:24px;border-right:1px solid var(--line)}
.step:last-child{border-right:0}
.step b{font-size:.75rem;font-weight:600;color:var(--accent);letter-spacing:.08em}
.step h3{margin:12px 0 8px;font-size:1rem;font-weight:600}
.step p{margin:0;font-size:.9375rem;color:var(--muted)}

/* --------------------------------------------------------------------------
   Livrables
   -------------------------------------------------------------------------- */
.deliverables{display:flex;flex-wrap:wrap;gap:8px}
.deliverables span{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-s);padding:10px 14px;font-size:.875rem;font-weight:500;color:var(--ink-soft)}

/* --------------------------------------------------------------------------
   FAQ
   -------------------------------------------------------------------------- */
.faq{max-width:820px;border-top:1px solid var(--line)}
details{border-bottom:1px solid var(--line);padding:20px 4px}
summary{cursor:pointer;font-weight:600;font-size:.9375rem;list-style:none;display:flex;align-items:baseline;justify-content:space-between;gap:16px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";color:var(--muted);font-size:1.125rem;line-height:1;flex-shrink:0}
details[open] summary::after{content:"\2212"}
details p{color:var(--muted);margin:12px 0 0;max-width:680px}

/* --------------------------------------------------------------------------
   Bandeau CTA
   -------------------------------------------------------------------------- */
.cta-band{padding:56px 0;background:var(--surface);border-top:1px solid var(--line)}
.cta-inner{display:grid;grid-template-columns:1fr auto;gap:24px;align-items:center}
.cta-inner h2{margin:0;font-family:var(--serif);font-size:1.625rem;font-weight:600;line-height:1.25}
.cta-inner p{margin:8px 0 0;color:var(--muted);max-width:640px}

/* --------------------------------------------------------------------------
   Pages internes
   -------------------------------------------------------------------------- */
.page-hero{padding:56px 0 40px;border-bottom:1px solid var(--line)}
.page-hero h1{
  font-family:var(--serif);
  font-size:clamp(1.875rem,3vw,2.5rem);
  font-weight:600;
  line-height:1.15;
  letter-spacing:-.01em;
  margin:12px 0 0;
  max-width:760px;
}
.page-hero p{font-size:1.0625rem;color:var(--muted);max-width:720px;margin:16px 0 0}

/* Services */
.services-stack{display:grid;gap:16px}
.service-detail{padding:32px}
.service-detail h2{margin:0 0 24px;font-family:var(--serif);font-size:1.375rem;font-weight:600;line-height:1.25}
.service-columns{display:grid;grid-template-columns:repeat(5,1fr);gap:20px;margin-bottom:24px}
.service-columns h3{margin:0 0 6px;font-size:.6875rem;font-weight:600;color:var(--accent);text-transform:uppercase;letter-spacing:.1em}
.service-columns p{margin:0;color:var(--muted);font-size:.875rem}

/* À propos */
.about-layout{display:grid;grid-template-columns:1.1fr .9fr;gap:24px;align-items:start}
.about-layout h2,.principles h2,.contact-panel h2,.contact-layout .card h2{margin:0 0 12px;font-family:var(--serif);font-size:1.25rem;font-weight:600}
.about-layout p{color:var(--muted);margin:0 0 14px}
.principles{padding:24px}
.principles ul{margin:0;padding-left:18px;color:var(--ink-soft);font-size:.9375rem}
.principles li+li{margin-top:10px}

/* Contact */
.contact-layout{display:grid;grid-template-columns:1.05fr .95fr;gap:16px;align-items:start}
.contact-layout .card{padding:32px}
.form{display:grid;gap:16px;margin-top:16px}
.field{display:grid;gap:6px}
.field > span{font-size:.8125rem;font-weight:500;color:var(--ink-soft)}
.input,.textarea{
  width:100%;
  border:1px solid var(--line-strong);
  border-radius:var(--radius-s);
  padding:12px 14px;
  font:400 .9375rem/1.5 var(--sans);
  color:var(--ink);
  background:rgba(255,255,255,.03);
}
.input::placeholder,.textarea::placeholder{color:rgba(159,170,164,.7)}
.textarea{min-height:144px;resize:vertical}
.input:focus,.textarea:focus{outline:2px solid rgba(15,163,111,.4);outline-offset:1px;border-color:var(--accent-strong)}
.form-status{font-size:.875rem;font-weight:500;color:var(--accent)}
.contact-panel{padding:32px;background:var(--surface-raised)}
.contact-panel p{color:var(--muted);margin:0}
.contact-lines{display:grid;margin:20px 0 24px}
.contact-lines a,.contact-lines span{display:flex;align-items:center;gap:10px;padding:12px 0;border-bottom:1px solid var(--line);font-size:.9375rem}
.contact-lines svg{width:18px;height:18px;color:var(--accent);flex-shrink:0}
.contact-lines a:hover{color:var(--accent)}
.consulting-note{display:grid;gap:4px;border:1px solid var(--line);border-radius:var(--radius-s);padding:16px}
.consulting-note strong{font-size:.9375rem}
.consulting-note span{font-size:.875rem;color:var(--muted)}

/* Ressources */
.blog-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.article-card{padding:24px}
.article-card > span{color:var(--accent);font-weight:600;text-transform:uppercase;letter-spacing:.1em;font-size:.6875rem}
.article-card h2{font-family:var(--serif);font-size:1.1875rem;font-weight:600;line-height:1.35;margin:10px 0 8px}
a.article-card{display:block;transition:border-color .15s ease}
a.article-card:hover{border-color:var(--accent)}
.article-card .text-link{display:inline-block;margin-top:16px}

/* Corps d'article */
.prose{max-width:720px}
.prose h2{font-family:var(--serif);font-size:1.375rem;font-weight:600;line-height:1.3;margin:32px 0 12px}
.prose p{color:var(--ink-soft);margin:0 0 16px}
.prose ul,.prose ol{color:var(--ink-soft);margin:0 0 16px;padding-left:22px}
.prose li+li{margin-top:8px}
.prose strong{color:var(--ink)}

/* Diagnostic de maturité */
.quiz{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:32px;max-width:820px}
.quiz fieldset{border:0;margin:0;padding:20px 0;border-bottom:1px solid var(--line)}
.quiz fieldset:first-child{padding-top:0}
.quiz .quiz-domain{display:block;font-size:.6875rem;font-weight:600;color:var(--accent);text-transform:uppercase;letter-spacing:.1em;margin-bottom:4px}
.quiz legend{padding:0;font-weight:600;font-size:.9375rem;line-height:1.45}
.quiz-options{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.quiz-opt{position:relative;display:inline-flex;align-items:center;border:1px solid var(--line-strong);border-radius:var(--radius-s);padding:8px 14px;font-size:.875rem;color:var(--muted);cursor:pointer;transition:border-color .15s ease,color .15s ease,background .15s ease}
.quiz-opt input{position:absolute;opacity:0;pointer-events:none}
.quiz-opt:hover{color:var(--ink)}
.quiz-opt:has(input:checked){border-color:var(--accent-strong);color:var(--ink);background:rgba(15,163,111,.08)}
.quiz-opt:has(input:focus-visible){outline:2px solid rgba(15,163,111,.4);outline-offset:1px}
.quiz-footer{display:grid;gap:16px;padding-top:24px}
.quiz-note{font-size:.8125rem;color:var(--muted)}
.quiz-result{display:none;border:1px solid var(--line-strong);border-radius:var(--radius-s);padding:20px}
.quiz-result.is-visible{display:grid;gap:6px}
.quiz-result strong{font-family:var(--serif);font-size:1.375rem;font-weight:600}
.quiz-result span{color:var(--muted);font-size:.9375rem}

/* Méthodologie ARAM */
.phases{border-top:1px solid var(--line)}
.phase{display:grid;grid-template-columns:44px 1fr;gap:24px;padding:32px 0;border-bottom:1px solid var(--line)}
.phase-num{display:flex;align-items:center;justify-content:center;width:44px;height:44px;border:1px solid var(--line-strong);border-radius:var(--radius-s);font-family:var(--serif);font-size:1.125rem;font-weight:600;color:var(--accent)}
.phase-body > .eyebrow{font-size:.6875rem}
.phase h2{margin:4px 0 0;font-family:var(--serif);font-size:1.375rem;font-weight:600;line-height:1.25}
.phase-body > p{margin:12px 0 0;color:var(--muted);max-width:680px}
.phase-deliverable{display:inline-block;margin-top:16px;border:1px solid var(--line-strong);border-radius:4px;padding:4px 10px;font-size:.6875rem;font-weight:500;text-transform:uppercase;letter-spacing:.08em;color:var(--ink-soft)}
.phase-deliverable strong{color:var(--accent);font-weight:600}

.chain{display:flex;flex-wrap:wrap;gap:10px 28px;margin:16px 0 0;padding:20px;border:1px solid var(--line);border-radius:var(--radius-s);background:rgba(255,255,255,.02);list-style:none}
.chain li{position:relative;border:1px solid var(--line-strong);border-radius:var(--radius-s);padding:6px 12px;font-size:.8125rem;color:var(--ink-soft);background:var(--surface-raised)}
.chain li:not(:last-child)::after{content:"\2192";position:absolute;right:-21px;top:50%;transform:translateY(-50%);color:var(--accent);font-size:.875rem}

.horizons{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:16px}
.horizon{border:1px solid var(--line);border-radius:var(--radius-s);padding:16px;background:var(--surface-raised)}
.horizon b{display:block;font-family:var(--serif);font-size:1.0625rem;font-weight:600}
.horizon span{font-size:.8125rem;color:var(--muted)}

/* Partenariats */
.partnership-box{padding:32px;display:grid;grid-template-columns:1fr auto;gap:24px;align-items:center}
.partnership-box h2{margin:12px 0 10px;font-family:var(--serif);font-size:1.5rem;font-weight:600;line-height:1.25}
.partnership-box p{margin:0;color:var(--muted);max-width:720px}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer{border-top:1px solid var(--line)}
.footer-inner{padding:40px 0;display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:24px}
.footer h4{margin:0 0 12px;font-size:.8125rem;font-weight:600;text-transform:uppercase;letter-spacing:.08em}
.footer p{margin:0;font-size:.9375rem}
.footer p,.footer a{color:var(--muted)}
.footer a:hover{color:var(--accent)}
.footer-bottom{border-top:1px solid var(--line);padding:16px 0;color:var(--muted);font-size:.8125rem}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */
@media (max-width:1040px){
  .header-cta{display:none}
  .hero-grid,.about-layout,.contact-layout{grid-template-columns:1fr}
  .hero-grid{gap:40px}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-5{grid-template-columns:repeat(2,1fr)}
  .service-columns{grid-template-columns:repeat(2,1fr)}
  .method{grid-template-columns:1fr 1fr}
  .step:nth-child(2n){border-right:0}
  .step:nth-child(-n+2){border-bottom:1px solid var(--line)}
  .horizons{grid-template-columns:repeat(2,1fr)}
}

@media (max-width:760px){
  .container{padding:0 16px}
  .brand-tag{display:none}
  .mobile-toggle{display:inline-flex}
  .nav{display:none}
  .nav.is-open{
    display:flex;
    position:absolute;
    left:0;
    right:0;
    top:61px;
    z-index:11;
    padding:8px 16px 16px;
    background:var(--bg);
    border-bottom:1px solid var(--line);
    flex-direction:column;
    align-items:stretch;
  }
  .nav.is-open a{padding:12px 8px;border-bottom:1px solid var(--line)}
  .nav.is-open a:last-child{border-bottom:0}
  .hero{padding:48px 0}
  .section,.cta-band{padding:48px 0}
  .maturity-rows li{grid-template-columns:1fr;gap:6px}
  .m-score{display:none}
  .grid-2,.grid-3,.grid-4,.grid-5,.blog-grid,.method,.service-columns,.cta-inner,.partnership-box,.horizons{grid-template-columns:1fr}
  .phase{grid-template-columns:1fr;gap:12px}
  .step{border-right:0;border-bottom:1px solid var(--line)}
  .step:last-child{border-bottom:0}
  .cta-inner .btn,.partnership-box .btn{justify-self:start}
}