/* =========================================================
   CHANVRENO — feuille de style principale
   Palette : encre chaude / ocre / gris craie / papier
   Typo : Fraunces (titres) + Archivo (tout le reste)
   ========================================================= */

:root{
  --ink: #2E2A25;
  --ink-70: rgba(46,42,37,.7);
  --ink-45: rgba(46,42,37,.45);
  --ochre: #B07D3A;
  --ochre-dark: #8f632b;
  --chalk: #A9A296;
  --paper: #EDE5D6;
  --paper-deep: #E2D6BE;
  --white: #FBF8F1;
  --line: rgba(46,42,37,.14);
  --line-strong: rgba(46,42,37,.28);
  --radius: 2px;
  --maxw: 1180px;
  --gutter: clamp(20px, 5vw, 64px);
  --serif: "Fraunces", "Iowan Old Style", "Georgia", serif;
  --sans: "Archivo", "Helvetica Neue", Arial, sans-serif;
}

*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  background: var(--white);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img{ max-width:100%; display:block; }
a{ color: inherit; text-decoration: none; }
ul{ margin:0; padding:0; list-style:none; }
h1,h2,h3,h4{ font-family: var(--serif); font-weight: 600; margin:0 0 .5em; letter-spacing: -0.01em; }
p{ margin: 0 0 1em; }
.container{ max-width: var(--maxw); margin: 0 auto; padding: 0 var(--gutter); }

/* subtle paper grain, kept very light so it never reads as a stock texture */
.grain{
  position: relative;
}
.grain::before{
  content:"";
  position:absolute; inset:0;
  pointer-events:none;
  opacity:.5;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='140' height='140'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix type='matrix' values='0 0 0 0 0  0 0 0 0 0  0 0 0 0 0  0 0 0 0.035 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
}

/* -------------------- Eyebrow / labels -------------------- */
.eyebrow{
  font-family: var(--sans);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--ochre-dark);
  display:flex; align-items:center; gap:.6em;
}
.eyebrow::before{
  content:"";
  width: 22px; height: 1px;
  background: var(--ochre);
}

/* -------------------- Buttons -------------------- */
.btn{
  display:inline-flex; align-items:center; gap:.6em;
  font-family: var(--sans); font-weight:700; font-size:13px;
  letter-spacing:.06em; text-transform:uppercase;
  padding: 14px 26px;
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  transition: background .18s ease, color .18s ease, border-color .18s ease;
}
.btn-primary{ background: var(--ink); color: var(--white); }
.btn-primary:hover{ background: var(--ochre-dark); border-color: var(--ochre-dark); }
.btn-ghost{ background: transparent; color: var(--ink); border-color: var(--line-strong); }
.btn-ghost:hover{ border-color: var(--ink); background: var(--ink); color: var(--white); }
.btn-arrow{ transition: transform .18s ease; }
.btn:hover .btn-arrow{ transform: translateX(3px); }

/* -------------------- Header -------------------- */
.site-header{
  position: sticky; top:0; z-index: 50;
  background: rgba(251,248,241,.92);
  backdrop-filter: saturate(140%) blur(6px);
  border-bottom: 1px solid var(--line);
}
.site-header .container{
  display:flex; align-items:center; justify-content:space-between;
  height: 84px;
}
.logo{
  font-family: var(--sans);
  font-weight: 900;
  font-size: 20px;
  letter-spacing: .1em;
  text-transform: uppercase;
  display:flex; align-items:center; gap:10px;
}
.logo-mark{ width: 30px; height: 30px; flex: none; }
.logo small{
  display:block; font-weight:600; font-size:9px; letter-spacing:.16em;
  color: var(--ink-45); text-transform: uppercase; margin-top:2px;
}
.main-nav{ display:flex; align-items:center; gap: 36px; }
.main-nav a{
  font-size: 13px; font-weight: 600; letter-spacing:.03em;
  padding: 6px 0; border-bottom: 1px solid transparent;
  transition: border-color .15s ease, color .15s ease;
}
.main-nav a:hover, .main-nav a.active{ border-color: var(--ochre); }
.nav-cta{ display:flex; align-items:center; gap:20px; }
.nav-toggle{
  display:none; width:38px; height:38px; border:1px solid var(--line-strong);
  border-radius: var(--radius); background:none; cursor:pointer;
  align-items:center; justify-content:center;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after{
  content:""; display:block; width:16px; height:1px; background:var(--ink); position:relative;
  transition: transform .2s ease, opacity .2s ease;
}
.nav-toggle span::before{ position:absolute; top:-5px; }
.nav-toggle span::after{ position:absolute; top:5px; }

/* -------------------- Hero -------------------- */
.hero{
  padding: 96px 0 80px;
  border-bottom: 1px solid var(--line);
}
.hero-grid{
  display:grid; grid-template-columns: 1.3fr .7fr; gap: 48px; align-items:end;
}
.hero h1{
  font-size: clamp(2.4rem, 5vw, 4.1rem);
  line-height: 1.04;
  max-width: 14ch;
}
.hero h1 em{ font-style: italic; color: var(--ochre-dark); }
.hero-lede{
  font-size: 18px; color: var(--ink-70); max-width: 40ch; margin-bottom: 28px;
}
.hero-actions{ display:flex; gap:14px; flex-wrap:wrap; }
.hero-aside{
  border-left: 1px solid var(--line-strong);
  padding-left: 28px;
}
.hero-aside p{ font-size:14px; color: var(--ink-70); }
.hero-aside .num{ font-family: var(--serif); font-size: 40px; color: var(--ochre-dark); display:block; }

/* block motif — a small css-drawn "coursing" pattern that nods to block-laying
   without using any stock icon set */
.block-motif{
  display:grid; grid-template-columns: repeat(6,1fr); gap:4px; margin-top:22px;
}
.block-motif span{ height:16px; background: var(--paper-deep); border:1px solid var(--line); }
.block-motif span:nth-child(3n){ background: var(--ochre); opacity:.85; }

/* -------------------- Sections -------------------- */
section{ padding: 88px 0; }
.section-tight{ padding: 56px 0; }
.section-paper{ background: var(--paper); }
.section-ink{ background: var(--ink); color: var(--white); }
.section-ink .eyebrow{ color: var(--paper-deep); }
.section-ink h2, .section-ink h3{ color: var(--white); }
.section-head{
  display:flex; justify-content:space-between; align-items:flex-end; gap: 32px;
  margin-bottom: 48px; flex-wrap:wrap;
}
.section-head h2{ font-size: clamp(1.8rem, 3.4vw, 2.6rem); max-width: 16ch; }
.section-head p{ max-width: 42ch; color: var(--ink-70); }
.section-ink .section-head p{ color: rgba(251,248,241,.72); }

/* -------------------- Two-pole cards -------------------- */
.pole-grid{ display:grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--line-strong); border:1px solid var(--line-strong); }
.pole-card{ background: var(--white); padding: 40px; }
.pole-card .tag{ font-size:12px; font-weight:700; letter-spacing:.14em; text-transform:uppercase; color:var(--ochre-dark); }
.pole-card h3{ font-size: 1.6rem; margin: 14px 0 16px; }
.pole-card ul{ margin-top: 18px; }
.pole-card li{
  padding: 10px 0; border-top: 1px solid var(--line); font-size: 14.5px; color: var(--ink-70);
  display:flex; gap:10px;
}
.pole-card li::before{ content:"—"; color: var(--ochre); flex:none; }

/* -------------------- Process steps -------------------- */
.steps{ display:grid; grid-template-columns: repeat(4,1fr); gap: 28px; }
.step{ border-top: 1px solid var(--line-strong); padding-top: 18px; }
.step .stepnum{ font-family: var(--serif); font-size: 34px; color: var(--chalk); }
.step h4{ font-size: 1rem; margin: 10px 0 8px; }
.step p{ font-size: 13.5px; color: var(--ink-70); margin:0; }

/* -------------------- Material grid (le chanvre) -------------------- */
.trait-grid{ display:grid; grid-template-columns: repeat(2,1fr); gap: 1px; background: var(--line); border:1px solid var(--line); }
.trait{ background: var(--white); padding: 34px; }
.trait h3{ font-size: 1.15rem; }
.trait p{ color: var(--ink-70); font-size: 14.5px; margin:0; }

/* -------------------- Cards: articles -------------------- */
.article-grid{ display:grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.article-card{
  border-top: 1px solid var(--line-strong);
  padding-top: 20px;
  display:flex; flex-direction:column; height:100%;
}
.article-card .meta{ font-size:11.5px; letter-spacing:.08em; text-transform:uppercase; color: var(--ink-45); margin-bottom:10px; }
.article-card h3{ font-size: 1.15rem; margin-bottom: 10px; }
.article-card p{ font-size: 14px; color: var(--ink-70); flex:1; }
.article-card .read{
  font-size: 12.5px; font-weight:700; letter-spacing:.06em; text-transform:uppercase;
  color: var(--ochre-dark); margin-top: 14px;
}
.status-pill{
  display:inline-block; font-size:10.5px; font-weight:700; letter-spacing:.08em; text-transform:uppercase;
  padding: 4px 9px; border:1px solid var(--line-strong); color: var(--ink-45); border-radius: 20px;
}

/* -------------------- Testimonial / trust placeholders -------------------- */
.trust-grid{ display:grid; grid-template-columns: repeat(3,1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.trust-card{ background: var(--paper); padding: 36px; min-height: 220px; display:flex; flex-direction:column; justify-content:space-between; }
.trust-card .who{ font-size:12px; font-weight:700; letter-spacing:.1em; text-transform:uppercase; color: var(--ink-45); }
.trust-card p{ font-family: var(--serif); font-size: 1.05rem; color: var(--ink-70); margin: 14px 0 0; }

/* -------------------- Illustrative project-type sheets -------------------- */
.case-list{ display:flex; flex-direction:column; }
.case{
  display:grid; grid-template-columns: 120px 1fr 200px; gap: 30px; align-items:start;
  padding: 30px 0; border-top: 1px solid var(--line-strong);
}
.case:last-child{ border-bottom: 1px solid var(--line-strong); }
.case .case-tag{ font-size:12px; font-weight:700; letter-spacing:.08em; text-transform:uppercase; color:var(--ochre-dark); }
.case h3{ font-size: 1.2rem; margin-bottom: 8px; }
.case p{ color: var(--ink-70); font-size: 14.5px; margin:0; }
.case .case-meta{ font-size:12.5px; color: var(--ink-45); }
.case .case-meta div{ padding: 6px 0; border-top: 1px solid var(--line); }
.case .case-meta div:first-child{ border-top:none; }

/* -------------------- Notice / callout -------------------- */
.notice{
  border: 1px solid var(--line-strong);
  background: var(--paper);
  padding: 22px 26px;
  font-size: 14px;
  color: var(--ink-70);
}
.notice strong{ color: var(--ink); }

/* -------------------- Forms -------------------- */
.form-grid{ display:grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.field{ display:flex; flex-direction:column; gap:8px; }
.field.full{ grid-column: 1 / -1; }
.field label{ font-size:12px; font-weight:700; letter-spacing:.06em; text-transform:uppercase; color: var(--ink-70); }
.field input, .field select, .field textarea{
  font-family: var(--sans); font-size:15px; color:var(--ink);
  background: var(--white); border: 1px solid var(--line-strong); border-radius: var(--radius);
  padding: 13px 14px;
}
.field textarea{ resize: vertical; min-height: 120px; }
.radio-row{ display:flex; gap:18px; flex-wrap:wrap; }
.radio-row label{ display:flex; align-items:center; gap:8px; font-size:14px; font-weight:500; text-transform:none; letter-spacing:0; color:var(--ink); }

/* -------------------- Footer -------------------- */
.site-footer{ background: var(--ink); color: var(--paper); padding: 64px 0 30px; }
.footer-grid{ display:grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 40px; }
.footer-grid h5{ font-size:12px; font-weight:700; letter-spacing:.1em; text-transform:uppercase; color: var(--paper-deep); margin-bottom:16px; }
.footer-grid a{ display:block; font-size:14px; color: rgba(251,248,241,.75); padding:6px 0; }
.footer-grid a:hover{ color: var(--white); }
.footer-bottom{
  margin-top: 48px; padding-top: 24px; border-top: 1px solid rgba(251,248,241,.15);
  display:flex; justify-content:space-between; flex-wrap:wrap; gap:10px;
  font-size: 12.5px; color: rgba(251,248,241,.55);
}

/* -------------------- Page hero (inner pages) -------------------- */
.page-hero{ padding: 64px 0 56px; border-bottom:1px solid var(--line); }
.page-hero h1{ font-size: clamp(2rem, 4vw, 3rem); max-width: 18ch; }
.page-hero p{ max-width: 56ch; color: var(--ink-70); font-size:17px; }
.breadcrumb{ font-size:12px; color: var(--ink-45); letter-spacing:.04em; margin-bottom: 18px; text-transform:uppercase; }

/* -------------------- Article page -------------------- */
.article-header{ max-width: 780px; margin: 0 auto; text-align:left; }
.article-body{ max-width: 720px; margin: 0 auto; }
.article-body h2{ font-size: 1.5rem; margin-top: 2em; }
.article-body p{ font-size: 17px; color: var(--ink-70); }
.article-body ul{ margin: 0 0 1.4em; padding-left: 0; }
.article-body li{ font-size:16px; color: var(--ink-70); padding-left: 20px; position:relative; margin-bottom:.5em; }
.article-body li::before{ content:"—"; position:absolute; left:0; color:var(--ochre); }

/* -------------------- Responsive -------------------- */
@media (max-width: 920px){
  .hero-grid{ grid-template-columns: 1fr; }
  .hero-aside{ border-left:none; border-top:1px solid var(--line-strong); padding-left:0; padding-top:20px; }
  .pole-grid, .trait-grid, .trust-grid{ grid-template-columns: 1fr; }
  .article-grid{ grid-template-columns: 1fr 1fr; }
  .steps{ grid-template-columns: 1fr 1fr; }
  .footer-grid{ grid-template-columns: 1fr 1fr; }
  .case{ grid-template-columns: 1fr; gap: 12px; }
}
@media (max-width: 680px){
  .main-nav{
    position:absolute; top:84px; left:0; right:0;
    background: var(--white); border-bottom:1px solid var(--line);
    flex-direction:column; align-items:flex-start; padding: 20px var(--gutter) 28px;
    display:none; gap: 4px;
  }
  .main-nav.open{ display:flex; }
  .main-nav a{ width:100%; padding: 12px 0; border-bottom:1px solid var(--line); }
  .nav-toggle{ display:flex; }
  .nav-cta .btn-ghost-desktop{ display:none; }
  .article-grid{ grid-template-columns: 1fr; }
  .steps{ grid-template-columns: 1fr; }
  .footer-grid{ grid-template-columns: 1fr; gap:28px; }
  .form-grid{ grid-template-columns: 1fr; }
}