:root{
    /* Charte graphique Dufaÿ Consulting — avril 2026 */
    --ink:#273532;        /* Vert Ardoise Foncé — prioritaire */
    --ochre:#CEA77C;      /* Saumon Ocre — prioritaire */
    --rose:#D67D65;       /* Rose Grenade — secondaire */
    --sage:#C4D2C8;       /* Vert Glauque — secondaire */
    --paper:#ffffff;
    --paper-alt:#EEF2EE;  /* teinte pâle dérivée du Vert Glauque */
    --gold:var(--ochre);
    --gold-soft:#E3CBAA;
    --slate:#56675F;
    --text:#252b26;
    --text-soft:#5c6a62;
    --line:#DCE3DE;
    --radius:2px;
  }
  *{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--paper);
    color:var(--text);
    font-family:"Montserrat", sans-serif;
    font-size:16px;
    line-height:1.6;
    font-weight:400;
  }
  h1,h2,h3,h4{
    font-family:"Playfair Display", serif;
    font-weight:600;
    margin:0;
    color:var(--ink);
    letter-spacing:-0.01em;
  }
  .mono{
    font-family:"Montserrat", sans-serif;
    font-weight:500;
    letter-spacing:0.06em;
  }
  a{color:inherit;}
  img{max-width:100%;display:block;}
  .wrap{
    max-width:1120px;
    margin:0 auto;
    padding:0 32px;
  }
  @media(max-width:640px){ .wrap{padding:0 20px;} }

  /* Header */
  header{
    position:sticky; top:0; z-index:50;
    background:rgba(255,255,255,0.92);
    backdrop-filter:blur(6px);
    border-bottom:1px solid var(--line);
  }
  .nav{
    display:flex; align-items:center; justify-content:space-between;
    padding:18px 0;
  }
  .brand{
    display:flex;
    align-items:center;
  }
  .brand img{height:34px; width:auto; display:block;}
  footer .brand img{height:30px;}
  nav.links{display:flex; gap:32px; font-size:14.5px;}
  nav.links a{text-decoration:none; color:var(--text-soft); transition:color .15s;}
  nav.links a:hover{color:var(--ink);}
  .nav-cta{
    font-size:13.5px;
    font-family:"Montserrat", sans-serif; font-weight:500;
    color:var(--ink);
    border:1px solid var(--ink);
    padding:9px 16px;
    text-decoration:none;
    border-radius:var(--radius);
    transition:background .15s, color .15s;
    white-space:nowrap;
  }
  .nav-cta:hover{background:var(--ink); color:#fff;}
  .menu-toggle{display:none;}
  @media(max-width:820px){
    nav.links{display:none;}
    .menu-toggle{display:block; background:none; border:1px solid var(--line); padding:8px 12px; font-family:"Montserrat",sans-serif; font-weight:500; font-size:12px; border-radius:var(--radius);}
  }

  /* Hero */
  .hero{
    position:relative;
    background:var(--ink);
    color:#eef1f5;
    overflow:hidden;
    padding:96px 0 88px;
  }
  .hero .ledger{
    position:absolute; inset:0;
    background-image:repeating-linear-gradient(to bottom, rgba(255,255,255,0.05) 0px, rgba(255,255,255,0.05) 1px, transparent 1px, transparent 42px);
    pointer-events:none;
  }
  .hero .watermark{
    position:absolute;
    top:50%; right:-60px;
    transform:translateY(-50%);
    height:520px;
    width:auto;
    opacity:0.06;
    pointer-events:none;
    filter:brightness(0) invert(1);
  }
  @media(max-width:900px){ .hero .watermark{display:none;} }
  .hero-grid{
    position:relative;
    display:grid;
    grid-template-columns:1.4fr 0.8fr;
    gap:56px;
    align-items:start;
  }
  @media(max-width:900px){ .hero-grid{grid-template-columns:1fr;} }
  .eyebrow{
    font-family:"Montserrat", sans-serif;
    font-weight:500;
    font-size:12px;
    letter-spacing:0.16em;
    text-transform:uppercase;
    color:var(--gold-soft);
    margin-bottom:22px;
    display:flex;
    align-items:center;
    gap:10px;
  }
  .eyebrow::before{content:"";width:26px;height:1px;background:var(--gold-soft);display:inline-block;}
  .hero h1{
    font-size:clamp(34px, 4.6vw, 54px);
    line-height:1.08;
    color:#fdfdfb;
  }
  .hero h1 em{ font-style:italic; color:var(--gold-soft); font-weight:500;}
  .hero p.lede{
    margin-top:24px;
    font-size:18px;
    max-width:46ch;
    color:#c5cfdb;
  }
  .hero-actions{margin-top:36px; display:flex; gap:16px; flex-wrap:wrap;}
  .btn-primary{
    background:var(--gold);
    color:var(--ink);
    text-decoration:none;
    font-family:"Montserrat", sans-serif;
    font-size:13.5px;
    padding:14px 22px;
    border-radius:var(--radius);
    font-weight:600;
    transition:filter .15s;
  }
  .btn-primary:hover{filter:brightness(1.08);}
  .btn-ghost{
    color:#eef1f5;
    text-decoration:none;
    font-family:"Montserrat", sans-serif;
    font-weight:500;
    font-size:13.5px;
    padding:14px 4px;
    border-bottom:1px solid rgba(255,255,255,0.35);
  }

  /* stamp */
  .stamp{
    justify-self:end;
    border:1px solid rgba(228,211,176,0.55);
    border-radius:50%;
    width:190px; height:190px;
    display:flex; align-items:center; justify-content:center;
    text-align:center;
    position:relative;
    transform:rotate(6deg);
  }
  .stamp::before{
    content:"";
    position:absolute; inset:10px;
    border:1px dashed rgba(228,211,176,0.4);
    border-radius:50%;
  }
  .stamp .stamp-text{
    font-family:"Montserrat", sans-serif;
    font-weight:500;
    font-size:11px;
    letter-spacing:0.09em;
    color:var(--gold-soft);
    line-height:1.7;
    text-transform:uppercase;
  }
  .stamp .stamp-num{
    font-family:"Playfair Display", serif;
    font-size:30px;
    color:#fdfdfb;
    display:block;
    margin-bottom:2px;
  }
  @media(max-width:900px){ .stamp{justify-self:start; margin-top:8px;} }

  /* section generic */
  section{padding:88px 0;}
  .section-alt{background:var(--paper-alt);}
  .kicker{
    font-family:"Montserrat", sans-serif; font-weight:500;
    font-size:12px;
    letter-spacing:0.14em;
    text-transform:uppercase;
    color:var(--gold);
    margin-bottom:14px;
  }
  .section-head{max-width:640px; margin-bottom:48px;}
  .section-head h2{font-size:clamp(26px,3vw,36px);}
  .section-head p{margin-top:16px; color:var(--text-soft); font-size:16.5px;}

  /* qui sommes-nous */
  .about-grid{
    display:grid;
    grid-template-columns:0.9fr 1.1fr;
    gap:64px;
  }
  @media(max-width:800px){ .about-grid{grid-template-columns:1fr; gap:36px;} }
  .about-grid p{color:var(--text-soft); margin:0 0 18px; font-size:16px;}
  .about-figure{
    background:var(--ink);
    color:#eef1f5;
    padding:34px 30px;
    border-radius:var(--radius);
  }
  .about-figure .big{
    font-family:"Playfair Display", serif;
    font-size:52px;
    color:var(--gold-soft);
    line-height:1;
  }
  .about-figure .label{
    font-family:"Montserrat", sans-serif; font-weight:500;
    font-size:12.5px;
    color:#c5cfdb;
    margin-top:10px;
    text-transform:uppercase;
    letter-spacing:0.08em;
  }
  .about-figure hr{border:none; border-top:1px solid rgba(255,255,255,0.14); margin:26px 0;}
  .about-figure ul{margin:0; padding:0; list-style:none;}
  .about-figure li{
    font-size:14.5px;
    color:#c5cfdb;
    padding:8px 0;
    border-top:1px solid rgba(255,255,255,0.1);
  }
  .about-figure li:first-child{border-top:none;}

  /* engagements */
  .engage-grid{
    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:1px;
    background:var(--line);
    border:1px solid var(--line);
  }
  @media(max-width:900px){ .engage-grid{grid-template-columns:repeat(2,1fr);} }
  @media(max-width:520px){ .engage-grid{grid-template-columns:1fr;} }
  .engage-card{
    background:var(--paper);
    padding:32px 26px;
  }
  .engage-card .mk{
    font-family:"Montserrat", sans-serif; font-weight:500;
    font-size:12px;
    color:var(--gold);
    margin-bottom:16px;
    display:block;
  }
  .engage-card h3{font-size:18px; font-weight:600; margin-bottom:10px; line-height:1.3;}
  .engage-card p{color:var(--text-soft); font-size:14.5px; margin:0;}

  /* expertises */
  .domain{
    border:1px solid var(--line);
    border-radius:var(--radius);
    margin-bottom:18px;
    background:var(--paper);
    overflow:hidden;
  }
  .domain summary{
    list-style:none;
    cursor:pointer;
    padding:26px 28px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:20px;
  }
  .domain summary::-webkit-details-marker{display:none;}
  .domain-head{display:flex; align-items:baseline; gap:18px;}
  .domain-num{
    font-family:"Montserrat", sans-serif; font-weight:500;
    color:var(--gold);
    font-size:13px;
  }
  .domain-title h3{font-size:21px;}
  .domain-title p{margin:6px 0 0; color:var(--text-soft); font-size:14.5px; max-width:56ch;}
  .domain-toggle{
    font-family:"Montserrat", sans-serif; font-weight:500;
    font-size:12px;
    color:var(--slate);
    border:1px solid var(--line);
    padding:6px 12px;
    border-radius:var(--radius);
    white-space:nowrap;
    flex-shrink:0;
  }
  .domain[open] .domain-toggle{background:var(--ink); color:#fff; border-color:var(--ink);}
  .domain-body{
    padding:0 28px 32px;
    border-top:1px solid var(--line);
  }
  .domain-cols{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:40px;
    padding-top:26px;
  }
  @media(max-width:760px){ .domain-cols{grid-template-columns:1fr;} }
  .domain-cols h4{
    font-family:"Montserrat", sans-serif; font-weight:500;
    font-size:12px;
    text-transform:uppercase;
    letter-spacing:0.08em;
    color:var(--slate);
    font-weight:500;
    margin-bottom:14px;
  }
  .mission-list{margin:0; padding:0; list-style:none;}
  .mission-list li{
    font-size:14.5px;
    color:var(--text);
    padding:10px 0 10px 18px;
    border-top:1px solid var(--line);
    position:relative;
  }
  .mission-list li:first-child{border-top:none;}
  .mission-list li::before{
    content:"";
    position:absolute; left:0; top:16px;
    width:6px; height:1px; background:var(--rose);
  }
  .case{
    background:var(--paper-alt);
    padding:16px 18px;
    border-radius:var(--radius);
    margin-bottom:12px;
  }
  .case:last-child{margin-bottom:0;}
  .case-title{font-size:14.5px; font-weight:600; color:var(--ink); margin-bottom:6px;}
  .case-desc{font-size:13.5px; color:var(--text-soft); margin:0;}

  /* references */
  .ref-table{width:100%; border-collapse:collapse; font-size:14px;}
  .ref-table th{
    font-family:"Montserrat", sans-serif; font-weight:500;
    font-size:11.5px;
    text-transform:uppercase;
    letter-spacing:0.06em;
    color:var(--slate);
    text-align:left;
    padding:12px 16px;
    border-bottom:1px solid var(--ink);
    font-weight:500;
  }
  .ref-table td{
    padding:16px;
    border-bottom:1px solid var(--line);
    vertical-align:top;
    color:var(--text-soft);
  }
  .ref-table td:first-child{color:var(--ink); font-weight:600; font-family:"Playfair Display",serif; font-size:15px;}
  .ref-table .clients{color:var(--rose); font-family:"Montserrat", sans-serif; font-weight:500; font-size:12.5px;}
  .table-scroll{overflow-x:auto; border:1px solid var(--line); border-radius:var(--radius);}

  /* contact */
  .contact{
    background:var(--ink);
    color:#eef1f5;
    border-radius:var(--radius);
    padding:56px;
    display:grid;
    grid-template-columns:0.85fr 1.15fr;
    gap:48px;
    align-items:center;
  }
  @media(max-width:760px){ .contact{grid-template-columns:1fr; padding:40px 28px;} }
  .contact h2{color:#fdfdfb; font-size:clamp(26px,3vw,34px);}
  .contact p{color:#c5cfdb; margin-top:14px; max-width:44ch;}
  .contact-card{
    background:rgba(255,255,255,0.05);
    border:1px solid rgba(255,255,255,0.14);
    padding:28px 32px;
    border-radius:var(--radius);
  }
  .contact-card .who{font-family:"Playfair Display", serif; font-size:20px; color:#fdfdfb;}
  .contact-card .role{font-family:"Montserrat", sans-serif; font-weight:500; font-size:12px; color:var(--gold-soft); text-transform:uppercase; letter-spacing:0.06em; margin-top:4px;}
  .contact-card hr{border:none; border-top:1px solid rgba(255,255,255,0.14); margin:20px 0;}
  .contact-line{display:flex; gap:10px; font-size:14.5px; color:#dbe2ea; padding:6px 0; white-space:nowrap;}
  .contact-line span.k{color:var(--gold-soft); font-family:"Montserrat", sans-serif; font-weight:500; font-size:12px; width:44px; flex-shrink:0; padding-top:2px;}
  .contact-line a{text-decoration:none; color:#eef1f5; border-bottom:1px solid rgba(255,255,255,0.3);}

  footer{
    padding:36px 0;
    border-top:1px solid var(--line);
  }
  .foot-row{display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:14px;}
  .foot-row .brand{font-size:15px;}
  footer .fine{font-size:12.5px; color:var(--text-soft); font-family:"Montserrat", sans-serif; font-weight:500;}

  /* ===== Blog ===== */
  .page-header{
    background:var(--ink);
    color:#eef1f5;
    padding:64px 0 56px;
    position:relative;
    overflow:hidden;
  }
  .page-header .ledger{
    position:absolute; inset:0;
    background-image:repeating-linear-gradient(to bottom, rgba(255,255,255,0.05) 0px, rgba(255,255,255,0.05) 1px, transparent 1px, transparent 42px);
    pointer-events:none;
  }
  .page-header .wrap{position:relative;}
  .page-header h1{
    font-size:clamp(30px, 4vw, 44px);
    color:#fdfdfb;
    margin-top:16px;
  }
  .page-header p.lede{
    margin-top:18px;
    font-size:17px;
    max-width:52ch;
    color:#c5cfdb;
  }
  .back-link{
    display:inline-flex;
    align-items:center;
    gap:8px;
    font-family:"Montserrat", sans-serif;
    font-weight:500;
    font-size:13.5px;
    color:var(--text-soft);
    text-decoration:none;
    margin-bottom:28px;
  }
  .back-link:hover{color:var(--ink);}

  .article-grid{
    display:grid;
    grid-template-columns:repeat(2, 1fr);
    gap:1px;
    background:var(--line);
    border:1px solid var(--line);
  }
  @media(max-width:760px){ .article-grid{grid-template-columns:1fr;} }
  .article-card{
    background:var(--paper);
    padding:32px;
    display:flex;
    flex-direction:column;
    text-decoration:none;
    transition:background .15s;
  }
  .article-card:hover{background:var(--paper-alt);}
  .article-date{
    font-family:"Montserrat", sans-serif;
    font-weight:500;
    font-size:12px;
    letter-spacing:0.08em;
    text-transform:uppercase;
    color:var(--ochre);
    margin-bottom:14px;
  }
  .article-card h3{
    font-size:21px;
    line-height:1.3;
    margin-bottom:12px;
  }
  .article-card p{
    color:var(--text-soft);
    font-size:14.5px;
    margin:0 0 18px;
    flex-grow:1;
  }
  .article-card .read-more{
    font-family:"Montserrat", sans-serif;
    font-weight:600;
    font-size:13.5px;
    color:var(--ink);
  }
  .article-card:hover .read-more{color:var(--rose);}

  /* Article page */
  .article-body{
    max-width:70ch;
    margin:0 auto;
    padding:64px 0 40px;
  }
  .article-body .article-date{margin-bottom:18px;}
  .article-body h1{
    font-size:clamp(28px, 4vw, 40px);
    line-height:1.2;
    margin-bottom:24px;
  }
  .article-body .author-line{
    font-family:"Montserrat", sans-serif;
    font-size:14px;
    color:var(--text-soft);
    padding-bottom:32px;
    margin-bottom:32px;
    border-bottom:1px solid var(--line);
  }
  .article-body h2{
    font-size:24px;
    margin-top:44px;
    margin-bottom:16px;
  }
  .article-body p{
    font-size:16.5px;
    color:var(--text);
    margin:0 0 20px;
  }
  .article-body ul{
    margin:0 0 20px;
    padding-left:20px;
    color:var(--text);
  }
  .article-body li{
    font-size:16.5px;
    margin-bottom:8px;
  }
  .article-body blockquote{
    margin:32px 0;
    padding:4px 0 4px 24px;
    border-left:2px solid var(--rose);
    font-family:"Playfair Display", serif;
    font-style:italic;
    font-size:20px;
    color:var(--ink);
  }
  .article-footer{
    max-width:70ch;
    margin:0 auto;
    padding:32px 0 64px;
    border-top:1px solid var(--line);
  }
  .article-footer .back-link{margin-bottom:0;}