/* HDF Advisory — feuille de styles commune à toutes les pages.
   Les polices sont déclarées à part dans /fonts/fonts.css. */

:root{
  --navy:#002060;
  --navy-deep:#001640;
  --cyan:#00B0F0;
  --cyan-text:#0077A8; /* cyan assombri pour texte/liens sur fond clair — contraste WCAG AA */
  --slate:#595959;
  --bg:#ffffff;
  --bg-alt:#f5f8fc;
  --card:#ffffff;
  --border:#e3e8f0;
  --text:#0f1b33;
  --text-dim:var(--slate);
  --max:1120px;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  font-family:'Inter',sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,.logo{font-family:'Montserrat',sans-serif;}
a{color:inherit;text-decoration:none;}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px;}

/* Header */
header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,0.9);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border);
}
nav{
  display:flex;align-items:center;justify-content:space-between;
  padding:18px 24px;max-width:var(--max);margin:0 auto;
}
.logo{font-size:20px;font-weight:700;letter-spacing:-0.02em;color:var(--navy);display:flex;align-items:center;}
.logo span{color:var(--cyan);}
.logo img{height:56px;width:auto;display:block;}
.nav-links{display:flex;gap:36px;align-items:center;}
.nav-links a{font-size:14px;color:var(--text-dim);transition:color .2s;font-weight:500;}
.nav-links a:hover{color:var(--navy);}
.nav-actions{display:flex;align-items:center;gap:16px;}
.lang-switch{font-size:13px;color:var(--text-dim);font-weight:600;}
.nav-cta{
  background:var(--cyan-text);color:#ffffff;padding:9px 18px;
  border-radius:8px;font-size:14px;font-weight:600;
}
.menu-toggle{display:none;background:none;border:none;color:var(--navy);font-size:24px;cursor:pointer;}

/* Hero */
.hero{
  padding:120px 24px 100px;
  text-align:center;
  position:relative;
  overflow:hidden;
  background:linear-gradient(160deg,var(--navy) 0%,var(--navy-deep) 100%);
  color:#ffffff;
}
.hero::before{
  content:"";position:absolute;top:-200px;left:50%;transform:translateX(-50%);
  width:800px;height:500px;
  background:radial-gradient(circle, rgba(0,176,240,0.25) 0%, rgba(0,176,240,0.08) 40%, transparent 70%);
  pointer-events:none;
}
.eyebrow{
  display:inline-block;font-size:13px;color:var(--cyan-text);
  letter-spacing:0.08em;text-transform:uppercase;font-weight:600;
  margin-bottom:20px;font-family:'Montserrat',sans-serif;
}
.hero .eyebrow{color:var(--cyan);} /* fond navy : cyan vif OK */
.hero h1{
  font-size:clamp(32px,5vw,54px);font-weight:700;line-height:1.15;
  letter-spacing:-0.02em;max-width:780px;margin:0 auto 24px;
  color:#ffffff;
}
.hero p{
  font-size:18px;color:#c7d3ea;max-width:600px;margin:0 auto 24px;
}
.hero .subtitle{
  font-size:15px;color:var(--cyan);font-weight:600;max-width:600px;margin:0 auto 8px;
}
.hero .tagline{
  font-size:14px;color:#a9b8d6;max-width:640px;margin:0 auto 40px;
}
.hero-ctas{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;}
.btn-primary{
  background:var(--cyan-text);
  color:#ffffff;padding:14px 28px;border-radius:10px;font-weight:600;font-size:15px;
  display:inline-block;
}
.btn-secondary{
  border:1px solid rgba(255,255,255,0.3);color:#ffffff;
  padding:14px 28px;border-radius:10px;font-weight:600;font-size:15px;
  display:inline-block;
}
.btn-secondary:hover{border-color:var(--cyan);}

/* Stats bar */
.stats{
  display:grid;grid-template-columns:repeat(4,1fr);
  max-width:900px;margin:64px auto 0;gap:24px;
}
.stat{text-align:center;}
.stat .num{font-family:'Montserrat',sans-serif;font-size:32px;font-weight:700;color:var(--cyan);}
.stat .num.icon{font-size:34px;line-height:1;}
.stat .label{font-size:13px;color:#a9b8d6;margin-top:4px;}

/* Sections */
section{padding:100px 0;}
.section-alt{background:var(--bg-alt);border-top:1px solid var(--border);border-bottom:1px solid var(--border);}
.section-head{text-align:center;max-width:640px;margin:0 auto 56px;}
.section-head .eyebrow{color:var(--cyan-text);}
.section-head h2{font-size:clamp(26px,3.5vw,38px);font-weight:700;letter-spacing:-0.01em;margin-bottom:16px;color:var(--navy);}
.section-head p{color:var(--text-dim);font-size:16px;}

/* Services */
.services-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.service-card{
  background:var(--card);border:1px solid var(--border);border-radius:14px;
  padding:32px;transition:border-color .2s, transform .2s, box-shadow .2s;
}
.service-card:hover{border-color:var(--cyan);transform:translateY(-2px);box-shadow:0 12px 24px rgba(0,32,96,0.08);}
.service-icon{
  width:44px;height:44px;border-radius:10px;
  background:linear-gradient(135deg,rgba(0,176,240,0.15),rgba(0,32,96,0.1));
  display:flex;align-items:center;justify-content:center;font-size:20px;margin-bottom:18px;
}
.service-card h3{font-size:18px;font-weight:600;margin-bottom:10px;color:var(--navy);}
.service-card p{color:var(--text-dim);font-size:14.5px;}

/* Expertise */
.expertise-layout{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center;}
.expertise-text h2{font-size:clamp(26px,3.5vw,36px);font-weight:700;letter-spacing:-0.01em;margin-bottom:20px;color:var(--navy);}
.expertise-text p{color:var(--text-dim);margin-bottom:18px;font-size:15.5px;}
.tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;}
.tag{
  background:var(--bg-alt);border:1px solid var(--border);
  padding:8px 16px;border-radius:20px;font-size:13.5px;color:var(--navy);font-weight:500;
}
.expertise-cards{display:flex;flex-direction:column;gap:16px;}
.exp-card{
  background:var(--bg-alt);border:1px solid var(--border);border-radius:12px;padding:22px 24px;
  display:flex;gap:16px;align-items:flex-start;
}
.exp-card .dot{width:8px;height:8px;border-radius:50%;background:var(--cyan);margin-top:7px;flex-shrink:0;}
.exp-card h4{font-size:15px;font-weight:600;margin-bottom:4px;color:var(--navy);}
.exp-card p{font-size:13.5px;color:var(--text-dim);}

/* Approach / process */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.step{position:relative;padding-top:8px;}
.step .step-num{
  font-family:'Montserrat',sans-serif;font-size:14px;color:#ffffff;font-weight:700;
  background:var(--navy);width:32px;height:32px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;margin-bottom:16px;
}
.step h3{font-size:16px;font-weight:600;margin-bottom:8px;color:var(--navy);}
.step p{font-size:13.5px;color:var(--text-dim);}

/* Contact */
.contact-box{
  background:linear-gradient(160deg,var(--navy) 0%,var(--navy-deep) 100%);
  border-radius:20px;
  padding:56px;text-align:center;color:#ffffff;
}
.contact-box h2{font-size:clamp(24px,3.5vw,34px);font-weight:700;margin-bottom:16px;color:#ffffff;}
.contact-box p{color:#c7d3ea;max-width:520px;margin:0 auto 32px;}
.contact-details{display:flex;gap:32px;justify-content:center;flex-wrap:wrap;margin-top:36px;font-size:14px;color:#a9b8d6;}
.contact-details a{color:#ffffff;font-weight:500;}
.contact-details a:hover{color:var(--cyan);}

/* Footer */
footer{
  padding:36px 24px;text-align:center;border-top:1px solid var(--border);
  color:var(--text-dim);font-size:13px;
}
.footer-links{margin-top:10px;display:flex;gap:20px;justify-content:center;flex-wrap:wrap;}
.footer-links a{color:var(--text-dim);}

@media (max-width:840px){
  /* Le menu se cale sous le header (sticky, donc bloc de référence), quelle que soit sa hauteur.
     +1px : top:100% part de l'intérieur de la bordure basse du header. */
  .nav-links{
    position:absolute;top:calc(100% + 1px);left:0;right:0;background:var(--bg);
    flex-direction:column;padding:24px;border-bottom:1px solid var(--border);
    display:none;gap:20px;
  }
  .nav-links.open{display:flex;}
  .menu-toggle{display:block;}
  /* Sur mobile le bouton passait sur trois lignes ; « Contact » reste accessible dans le menu. */
  .nav-cta{display:none;}
  .stats{grid-template-columns:repeat(2,1fr);}
  .services-grid{grid-template-columns:1fr;}
  .expertise-layout{grid-template-columns:1fr;}
  .steps{grid-template-columns:repeat(2,1fr);}
  .contact-box{padding:36px 24px;}
}

/* Pages légales (mentions légales, confidentialité) */
body.page-legal{line-height:1.7;}
.page-legal h1,.page-legal h2{color:var(--navy);}
.page-legal a{color:var(--cyan-text);text-decoration:underline;}
.page-legal header{
  position:static;background:none;backdrop-filter:none;
  border-bottom:1px solid var(--border);padding:20px 24px;
}
.page-legal .logo{display:inline;font-size:18px;letter-spacing:normal;color:var(--navy);text-decoration:none;}
.page-legal .logo span{color:var(--cyan-text);}
.page-legal main{max-width:760px;margin:0 auto;padding:64px 24px 100px;}
.page-legal h1{font-size:32px;margin-bottom:8px;}
.page-legal .updated{color:var(--slate);font-size:13px;margin-bottom:40px;}
.page-legal h2{font-size:19px;margin:36px 0 12px;}
.page-legal p{margin-bottom:14px;color:#2b3242;}
.page-legal ul{margin:0 0 14px 20px;color:#2b3242;}
.page-legal li{margin-bottom:6px;}
.page-legal footer{padding:30px 24px;}
.page-legal footer a{color:var(--slate);margin:0 10px;}

/* Page 404 */
body.page-404{
  min-height:100vh;
  display:flex;align-items:center;justify-content:center;text-align:center;
  background:linear-gradient(160deg,var(--navy) 0%,var(--navy-deep) 100%);
  color:#fff;padding:24px;
}
.page-404 .box{max-width:520px;}
.page-404 .code{font-family:'Montserrat',sans-serif;font-size:clamp(64px,14vw,120px);font-weight:800;color:var(--cyan);line-height:1;}
.page-404 h1{font-size:clamp(22px,4vw,30px);font-weight:700;margin:12px 0 16px;}
.page-404 p{color:#c7d3ea;margin-bottom:32px;}
.page-404 .btn{
  display:inline-block;background:var(--cyan);color:#fff;
  padding:14px 28px;border-radius:10px;font-weight:600;font-size:15px;
}
.page-404 .links{margin-top:28px;font-size:14px;}
.page-404 .links a{color:#a9b8d6;margin:0 10px;}
.page-404 .links a:hover{color:#fff;}

/* Liens de texte */
.text-link{color:var(--cyan-text);font-weight:600;text-decoration:underline;text-underline-offset:3px;}
.text-link:hover{color:var(--navy);}
.service-card .service-link{display:inline-block;margin-top:14px;font-size:14px;}

/* Pages expertise : chaque bloc de contenu est une .prose-section autonome,
   une section supplémentaire s'insère sans toucher à la mise en page. */
.wrap.narrow{max-width:860px;}
.page-hero{padding:88px 24px 72px;text-align:left;}
.page-hero h1{max-width:none;margin:0 0 20px;}
.page-hero p{max-width:none;margin:0 0 14px;}
.page-hero .hero-ctas{justify-content:flex-start;margin-top:32px;}
.prose-section{padding:64px 0;}
.prose-section + .prose-section{border-top:1px solid var(--border);}
.prose-section h2{font-size:clamp(24px,3vw,30px);font-weight:700;letter-spacing:-0.01em;color:var(--navy);margin-bottom:20px;}
.prose-section p{color:var(--text-dim);font-size:16px;margin-bottom:14px;}
.prose-section p:last-child{margin-bottom:0;}
.check-list{list-style:none;display:flex;flex-direction:column;gap:12px;}
.check-list li{position:relative;padding-left:22px;color:var(--text-dim);font-size:16px;}
.check-list li::before{content:"";position:absolute;left:0;top:10px;width:8px;height:8px;border-radius:50%;background:var(--cyan);}
ul.tags{list-style:none;margin-top:0;}
.mission{background:var(--bg-alt);border:1px solid var(--border);border-radius:14px;padding:28px 32px;}
.mission + .mission{margin-top:20px;}
.mission h3{font-size:18px;font-weight:600;color:var(--navy);margin-bottom:4px;}
.prose-section .mission-meta{font-size:14px;color:var(--cyan-text);font-weight:500;margin-bottom:16px;}
.mission p{font-size:15px;}
.mission strong{color:var(--navy);font-weight:600;}
.steps-link{text-align:center;margin-top:48px;font-size:15px;}
.cross-section{padding:64px 0 0;}
.cross-card{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:24px 28px;border:1px solid var(--border);border-radius:14px;
  font-family:'Montserrat',sans-serif;font-weight:600;font-size:17px;color:var(--navy);
  transition:border-color .2s, box-shadow .2s;
}
.cross-card:hover{border-color:var(--cyan);box-shadow:0 12px 24px rgba(0,32,96,0.08);}
.cross-card span{color:var(--cyan-text);font-size:22px;}

@media (max-width:840px){
  .page-hero{padding:64px 24px 56px;}
  .prose-section{padding:48px 0;}
  .mission{padding:22px 20px;}
  .cross-section{padding-top:48px;}
}