/* =========================================================
   CORIS BTP SARL — Design system
   Concept: le site comme un plan technique (blueprint).
   Grilles de calque, cotes (dimension lines), repères d'angle,
   codes d'index (A.01…) et un cartouche (title block) en pied
   de page — le vocabulaire visuel du génie civil lui-même.
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&family=Inter:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root{
  --navy: #2F497C;
  --navy-deep: #16233F;
  --green: #3E8E41;
  --orange: #F39234;
  --stone: #F4F2ED;
  --paper: #FFFFFF;
  --ink: #16202E;
  --ink-soft: #4B5768;
  --line: #CBD3DD;
  --line-soft: #E4E7EC;
  --blueprint-tint: #EDF1F7;

  --display: 'Space Grotesk', 'Arial Narrow', sans-serif;
  --body: 'Inter', -apple-system, sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, monospace;

  --container: 1180px;
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--stone);
  color:var(--ink);
  font-family:var(--body);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
h1,h2,h3,h4{ font-family:var(--display); margin:0; letter-spacing:-0.01em; color:var(--navy-deep); }
p{ margin:0; }
ul{ margin:0; padding:0; list-style:none; }
button{ font-family:inherit; }

.wrap{ max-width:var(--container); margin:0 auto; padding:0 24px; }

/* focus visibility */
a:focus-visible, button:focus-visible{
  outline:2px solid var(--orange);
  outline-offset:3px;
}

/* ---------- eyebrow / mono labels ---------- */
.eyebrow{
  font-family:var(--mono);
  font-size:12.5px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--green);
  display:flex;
  align-items:center;
  gap:10px;
}
.eyebrow::before{
  content:"";
  width:18px; height:1px;
  background:var(--green);
  display:inline-block;
}

/* ---------- header ---------- */
.site-header{
  position:sticky; top:0; z-index:50;
  background:rgba(244,242,237,.92);
  backdrop-filter:blur(6px);
  border-bottom:1px solid var(--line);
}
.site-header .wrap{
  display:flex; align-items:center; justify-content:space-between;
  height:76px;
}
.brand{ display:flex; align-items:center; gap:12px; }
.brand img{ height:48px; width:auto; }
.brand-text{ font-family:var(--display); font-weight:700; font-size:18px; color:var(--navy-deep); line-height:1.1; }
.brand-text span{ display:block; font-family:var(--mono); font-weight:400; font-size:10.5px; letter-spacing:.1em; color:var(--ink-soft); text-transform:uppercase; margin-top:2px; }

nav.main-nav ul{ display:flex; gap:2px; }
nav.main-nav a{
  font-size:14.5px; font-weight:500; padding:10px 16px; border-radius:2px;
  color:var(--navy-deep);
  position:relative;
}
nav.main-nav a::after{
  content:""; position:absolute; left:16px; right:16px; bottom:6px; height:2px;
  background:var(--orange); transform:scaleX(0); transform-origin:left; transition:transform .2s ease;
}
nav.main-nav a:hover::after, nav.main-nav a.active::after{ transform:scaleX(1); }
nav.main-nav a.active{ color:var(--navy); }

.nav-cta{
  display:inline-flex; align-items:center; gap:8px;
  background:var(--navy-deep); color:#fff !important;
  padding:10px 18px !important; font-weight:600 !important;
  border:1px solid var(--navy-deep);
}
.nav-cta::after{ display:none; }
.nav-cta:hover{ background:var(--navy); }

.burger{
  display:none; background:none; border:1px solid var(--line); border-radius:2px;
  width:42px; height:42px; align-items:center; justify-content:center; cursor:pointer;
}
.burger span, .burger span::before, .burger span::after{
  content:""; display:block; width:20px; height:2px; background:var(--navy-deep); position:relative;
  transition:transform .2s ease, opacity .2s ease;
}
.burger span::before{ position:absolute; top:-6px; }
.burger span::after{ position:absolute; top:6px; }

/* ---------- hero (blueprint plate) ---------- */
.hero{
  position:relative;
  background:
    linear-gradient(var(--blueprint-tint), var(--blueprint-tint)) padding-box,
    repeating-linear-gradient(0deg, transparent, transparent 39px, var(--line-soft) 39px, var(--line-soft) 40px),
    repeating-linear-gradient(90deg, transparent, transparent 39px, var(--line-soft) 39px, var(--line-soft) 40px);
  border-bottom:1px solid var(--line);
  overflow:hidden;
  padding:76px 0 64px;
}
.hero::before, .hero::after{
  content:""; position:absolute; top:18px; bottom:18px; width:1px; background:var(--line);
}
.hero::before{ left:18px; }
.hero::after{ right:18px; }
.crop{ position:absolute; width:22px; height:22px; border:1.5px solid var(--navy); opacity:.55; }
.crop.tl{ top:18px; left:18px; border-right:none; border-bottom:none; }
.crop.tr{ top:18px; right:18px; border-left:none; border-bottom:none; }
.crop.bl{ bottom:18px; left:18px; border-right:none; border-top:none; }
.crop.br{ bottom:18px; right:18px; border-left:none; border-top:none; }

.hero-inner{ position:relative; max-width:760px; }
.hero .eyebrow{ margin-bottom:18px; }
.hero h1{ font-size:clamp(34px,5vw,54px); line-height:1.05; font-weight:700; }
.hero h1 em{ font-style:normal; color:var(--green); }
.hero p.lede{ margin-top:20px; font-size:18px; color:var(--ink-soft); max-width:620px; }
.hero-cta{ display:flex; gap:14px; margin-top:32px; flex-wrap:wrap; }

.btn{
  display:inline-flex; align-items:center; gap:10px;
  padding:14px 24px; font-weight:600; font-size:14.5px; border-radius:2px;
  border:1px solid transparent; cursor:pointer;
}
.btn-primary{ background:var(--navy-deep); color:#fff; border-color:var(--navy-deep); }
.btn-primary:hover{ background:var(--navy); }
.btn-ghost{ background:transparent; color:var(--navy-deep); border-color:var(--navy-deep); }
.btn-ghost:hover{ background:var(--navy-deep); color:#fff; }
.btn-orange{ background:var(--orange); color:var(--navy-deep); border-color:var(--orange); }
.btn-orange:hover{ filter:brightness(.94); }

/* dimension line under hero content */
.dim{ margin-top:44px; display:flex; align-items:center; gap:10px; color:var(--ink-soft); font-family:var(--mono); font-size:12px; }
.dim-line{ flex:1; height:1px; background:var(--ink-soft); position:relative; }
.dim-line::before, .dim-line::after{ content:""; position:absolute; top:-4px; width:1px; height:9px; background:var(--ink-soft); }
.dim-line::before{ left:0; }
.dim-line::after{ right:0; }

/* ---------- sections ---------- */
section{ padding:88px 0; }
section.tight{ padding:56px 0; }
.section-head{ max-width:640px; margin-bottom:48px; }
.section-head h2{ font-size:clamp(26px,3.4vw,36px); margin-top:14px; }
.section-head p{ margin-top:14px; color:var(--ink-soft); font-size:16.5px; }

.bg-paper{ background:var(--paper); }
.bg-deep{ background:var(--navy-deep); }
.bg-deep h2, .bg-deep h3{ color:#fff; }
.bg-deep p{ color:#C7D0DE; }
.bg-deep .eyebrow{ color:var(--orange); }
.bg-deep .eyebrow::before{ background:var(--orange); }

.rule{ border:none; border-top:1px solid var(--line); }

/* ---------- stat strip ---------- */
.stats{
  display:grid; grid-template-columns:repeat(4,1fr);
  border:1px solid var(--line); background:var(--paper);
}
.stats div{ padding:26px 22px; border-left:1px solid var(--line); }
.stats div:first-child{ border-left:none; }
.stat-num{ font-family:var(--mono); font-size:28px; font-weight:500; color:var(--navy); }
.stat-label{ font-size:13px; color:var(--ink-soft); margin-top:6px; }

/* ---------- pillars / feature grid ---------- */
.grid-3{ display:grid; grid-template-columns:repeat(3,1fr); gap:1px; background:var(--line); border:1px solid var(--line); }
.grid-3 > div{ background:var(--paper); padding:32px; }
.pillar-mark{ font-family:var(--mono); font-size:12px; color:var(--orange); letter-spacing:.1em; }
.pillar h3{ font-size:19px; margin-top:14px; }
.pillar p{ margin-top:10px; color:var(--ink-soft); font-size:15px; }

/* ---------- activity index cards ---------- */
.index-list{ display:grid; grid-template-columns:repeat(2,1fr); gap:1px; background:var(--line); border:1px solid var(--line); }
.index-card{
  background:var(--paper); padding:30px 30px 26px; position:relative;
}
.index-card .code{
  font-family:var(--mono); font-size:13px; color:var(--green); letter-spacing:.06em;
}
.index-card h3{ font-size:20px; margin-top:10px; }
.index-card p{ margin-top:10px; color:var(--ink-soft); font-size:15px; }
.index-card a.more{ margin-top:16px; display:inline-block; font-family:var(--mono); font-size:12.5px; color:var(--navy); border-bottom:1px solid var(--navy); }
.index-card .bracket{ position:absolute; width:12px; height:12px; border:1.5px solid var(--line); opacity:0; transition:opacity .15s ease; }
.index-card:hover .bracket{ opacity:1; border-color:var(--orange); }
.index-card .bracket.tl{ top:8px; left:8px; border-right:none; border-bottom:none; }
.index-card .bracket.br{ bottom:8px; right:8px; border-left:none; border-top:none; }

/* detail variant with icon */
.index-card.detail{ display:flex; gap:18px; align-items:flex-start; }
.index-card.detail .icon{ width:44px; height:44px; flex:none; color:var(--navy); }
.index-card.detail .icon svg{ width:100%; height:100%; }
.tag-row{ display:flex; gap:8px; flex-wrap:wrap; margin-top:14px; }
.tag{ font-family:var(--mono); font-size:11px; padding:4px 8px; border:1px solid var(--line); color:var(--ink-soft); border-radius:2px; }
.tag.live{ background:var(--orange); border-color:var(--orange); color:#fff; font-weight:600; margin-left:10px; letter-spacing:.04em; }
.tag.done{ background:var(--green); border-color:var(--green); color:#fff; font-weight:600; margin-left:10px; letter-spacing:.04em; }

.index-card.featured{ border-left:3px solid var(--orange); background:var(--paper); }
.index-card.featured .code{ display:flex; align-items:center; flex-wrap:wrap; gap:2px; }

/* ---------- preview grid homepage ---------- */
.preview-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:1px; background:var(--line); border:1px solid var(--line); }
.preview-card{ background:var(--paper); padding:26px; }
.preview-card .code{ font-family:var(--mono); font-size:12px; color:var(--green); display:flex; align-items:center; flex-wrap:wrap; gap:2px; }
.preview-card.featured{ border-left:3px solid var(--orange); }
.preview-card h3{ font-size:17px; margin-top:8px; }
.preview-card p{ font-size:14px; color:var(--ink-soft); margin-top:8px; }

/* ---------- CTA band ---------- */
.cta-band{
  background:var(--navy-deep); color:#fff; padding:64px 0;
  border-top:3px solid var(--orange);
  display:flex; align-items:center; justify-content:space-between; gap:24px; flex-wrap:wrap;
}
.cta-band h2{ color:#fff; font-size:clamp(22px,3vw,30px); max-width:520px; }
.cta-band p{ color:#C7D0DE; margin-top:10px; }

/* ---------- timeline (about page) ---------- */
.timeline{ position:relative; padding-left:28px; }
.timeline::before{ content:""; position:absolute; left:6px; top:4px; bottom:4px; width:1px; background:var(--line); }
.timeline .t-item{ position:relative; padding-bottom:34px; }
.timeline .t-item::before{ content:""; position:absolute; left:-28px; top:4px; width:9px; height:9px; background:var(--orange); border-radius:50%; }
.timeline .t-item h4{ font-size:16px; }
.timeline .t-item span{ font-family:var(--mono); font-size:12px; color:var(--green); }
.timeline .t-item p{ margin-top:6px; color:var(--ink-soft); font-size:15px; }

/* ---------- values grid ---------- */
.values-grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:24px; }
.value{ border-top:2px solid var(--navy); padding-top:16px; }
.value h4{ font-size:16px; }
.value p{ margin-top:8px; font-size:14px; color:var(--ink-soft); }

/* ---------- contact page ---------- */
.contact-grid{ display:grid; grid-template-columns:1.1fr .9fr; gap:1px; background:var(--line); border:1px solid var(--line); }
.contact-panel{ background:var(--paper); padding:40px; }
.field{ margin-bottom:20px; }
.field label{ display:block; font-family:var(--mono); font-size:12px; letter-spacing:.06em; color:var(--ink-soft); margin-bottom:6px; text-transform:uppercase; }
.field input, .field textarea{
  width:100%; border:1px solid var(--line); background:var(--stone); padding:12px 14px;
  font-family:var(--body); font-size:14.5px; color:var(--ink); border-radius:2px;
}
.field input:focus, .field textarea:focus{ outline:2px solid var(--orange); outline-offset:1px; }
.field textarea{ min-height:120px; resize:vertical; }

.contact-info h3{ font-size:15px; letter-spacing:.02em; }
.info-row{ display:flex; gap:14px; padding:16px 0; border-top:1px solid var(--line-soft); }
.info-row:first-of-type{ border-top:none; }
.info-row .k{ font-family:var(--mono); font-size:11.5px; color:var(--green); width:110px; flex:none; text-transform:uppercase; letter-spacing:.06em; padding-top:2px; }
.info-row .v{ font-size:14.5px; color:var(--ink); }
.map-plate{
  margin-top:26px; border:1px solid var(--line); background:var(--blueprint-tint);
  height:180px; display:flex; align-items:center; justify-content:center;
  font-family:var(--mono); font-size:12px; color:var(--ink-soft); text-align:center; padding:16px;
}

/* ---------- title-block footer ---------- */
footer.title-block{ background:var(--paper); border-top:1px solid var(--line); }
.tb-grid{
  display:grid; grid-template-columns:1.4fr 1fr 1fr 1fr;
  border:1px solid var(--line); border-bottom:none; margin-top:40px;
}
.tb-cell{ padding:20px 22px; border-left:1px solid var(--line); border-bottom:1px solid var(--line); }
.tb-cell:first-child{ border-left:none; }
.tb-k{ font-family:var(--mono); font-size:10.5px; letter-spacing:.12em; color:var(--ink-soft); text-transform:uppercase; }
.tb-v{ margin-top:8px; font-size:14.5px; color:var(--ink); }
.tb-v a:hover{ color:var(--navy); }
.tb-logo{ display:flex; align-items:center; gap:12px; }
.tb-logo img{ height:36px; }
.tb-bottom{
  display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:10px;
  padding:16px 0; font-family:var(--mono); font-size:11.5px; color:var(--ink-soft);
  border:1px solid var(--line); border-top:none;
}
.tb-bottom .wrap{ display:flex; justify-content:space-between; width:100%; flex-wrap:wrap; gap:10px; }

/* ---------- briqueterie — dedicated tracking section ---------- */
.media-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:1px; background:var(--line); border:1px solid var(--line); margin-top:22px; }
.media-plate{
  background:var(--paper); aspect-ratio:4/3; display:flex; flex-direction:column; align-items:center; justify-content:center;
  gap:10px; color:var(--ink-soft); font-family:var(--mono); font-size:12px; text-align:center; padding:18px;
  border:1px dashed var(--line);
}
.media-plate svg{ width:30px; height:30px; opacity:.55; }
.media-plate span{ max-width:180px; }

.capacity-grid{ display:grid; grid-template-columns:repeat(3,1fr); border:1px solid var(--line); background:var(--paper); margin-top:22px; }
.capacity-grid > div{ padding:26px 22px; border-left:1px solid var(--line); }
.capacity-grid > div:first-child{ border-left:none; }
.cap-value{ font-family:var(--mono); font-size:24px; font-weight:500; color:var(--orange); }
.cap-label{ font-size:13px; color:var(--ink-soft); margin-top:6px; }

.progress-summary{ display:flex; align-items:baseline; gap:12px; margin-top:8px; }
.progress-summary .cap-value{ font-size:22px; }
.progress-track{ position:relative; height:6px; background:var(--line-soft); margin:16px 0 4px; }
.progress-track::before, .progress-track::after{ content:""; position:absolute; top:-5px; width:1px; height:16px; background:var(--ink-soft); opacity:.4; }
.progress-track::before{ left:0; }
.progress-track::after{ right:0; }
.progress-fill{ position:absolute; top:0; left:0; height:100%; background:linear-gradient(90deg, var(--green), var(--orange)); width:65%; }

.phase-list .t-item .tag{ margin-left:10px; vertical-align:middle; }

/* ---------- manifesto pull-quote ---------- */
.manifesto{ position:relative; max-width:820px; }
.manifesto .quote-mark{ font-family:var(--display); font-size:64px; line-height:1; color:var(--orange); display:block; margin-bottom:4px; }
.manifesto p{ font-family:var(--display); font-size:clamp(22px,3vw,32px); line-height:1.35; color:var(--navy-deep); font-weight:600; }
.manifesto footer{ margin-top:22px; font-family:var(--mono); font-size:13px; color:var(--ink-soft); }

/* ---------- large photo-ready showcase gallery ---------- */
.showcase-grid{ display:grid; grid-template-columns:1.4fr 1fr; gap:1px; background:var(--line); border:1px solid var(--line); margin-top:32px; }
.showcase-grid .showcase-main{ grid-row:span 2; }
.showcase-plate{
  background:var(--paper); min-height:220px; display:flex; flex-direction:column; align-items:center; justify-content:center;
  gap:12px; color:var(--ink-soft); font-family:var(--mono); font-size:12.5px; text-align:center; padding:22px;
  border:1px dashed var(--line);
}
.showcase-plate.showcase-main{ min-height:100%; }
.showcase-plate svg{ width:38px; height:38px; opacity:.5; }
.showcase-plate span{ max-width:220px; }
.showcase-plate .plate-label{ font-family:var(--mono); font-size:10.5px; letter-spacing:.1em; text-transform:uppercase; color:var(--green); }

@media (max-width: 760px){
  .showcase-grid{ grid-template-columns:1fr; }
  .showcase-grid .showcase-main{ grid-row:auto; }
}

.media-plate.photo, .showcase-plate.photo{
  border-style:solid; padding:0; overflow:hidden; aspect-ratio:4/3; position:relative;
}
.showcase-plate.photo.showcase-main{ aspect-ratio:auto; }
.media-plate.photo img, .showcase-plate.photo img{ width:100%; height:100%; object-fit:cover; display:block; }
.media-plate.photo figcaption, .showcase-plate.photo figcaption{
  position:absolute; left:0; right:0; bottom:0; padding:10px 14px;
  background:linear-gradient(0deg, rgba(22,32,46,.82), transparent);
  color:#fff; font-family:var(--mono); font-size:11.5px; letter-spacing:.03em;
}

.tech-sheet{ margin-top:32px; border:1px solid var(--line); background:var(--paper); }
.tech-sheet img{ width:100%; display:block; }
.tech-sheet figcaption{ padding:14px 18px; font-family:var(--mono); font-size:12px; color:var(--ink-soft); border-top:1px solid var(--line); }

.price-tables{ display:grid; grid-template-columns:1fr 1fr; gap:1px; background:var(--line); border:1px solid var(--line); margin-top:22px; }
.price-table{ background:var(--paper); }
.price-table h4{
  font-family:var(--mono); font-size:12.5px; letter-spacing:.08em; text-transform:uppercase; color:var(--navy);
  background:var(--blueprint-tint); padding:14px 18px; margin:0; border-bottom:1px solid var(--line);
}
.price-table table{ width:100%; border-collapse:collapse; font-size:14px; }
.price-table th{
  text-align:left; font-family:var(--mono); font-size:10.5px; color:var(--ink-soft); text-transform:uppercase;
  letter-spacing:.05em; padding:10px 18px; border-bottom:1px solid var(--line);
}
.price-table td{ padding:11px 18px; border-bottom:1px solid var(--line-soft); vertical-align:top; }
.price-table tr:last-child td{ border-bottom:none; }
.price-table td.num{ font-family:var(--mono); text-align:right; color:var(--navy); font-weight:500; white-space:nowrap; }
.price-note{ margin-top:14px; font-size:13px; color:var(--ink-soft); }

@media (max-width: 900px){
  .price-tables{ grid-template-columns:1fr; }
}
@media (max-width: 760px){
  .media-grid{ grid-template-columns:1fr; }
  .capacity-grid{ grid-template-columns:1fr; }
  .capacity-grid > div{ border-left:none; border-top:1px solid var(--line); }
  .capacity-grid > div:first-child{ border-top:none; }
}

@media (max-width: 900px){
  .stats{ grid-template-columns:repeat(2,1fr); }
  .stats div:nth-child(3){ border-left:none; }
  .grid-3{ grid-template-columns:1fr; }
  .index-list{ grid-template-columns:1fr; }
  .preview-grid{ grid-template-columns:1fr; }
  .values-grid{ grid-template-columns:repeat(2,1fr); }
  .contact-grid{ grid-template-columns:1fr; }
  .tb-grid{ grid-template-columns:1fr 1fr; }
}
@media (max-width: 760px){
  nav.main-nav, .nav-cta{ display:none; }
  .burger{ display:flex; }
  .site-header.open nav.main-nav{
    display:flex; position:absolute; top:76px; left:0; right:0; background:var(--paper);
    border-bottom:1px solid var(--line); flex-direction:column; padding:8px 0;
  }
  .site-header.open nav.main-nav ul{ flex-direction:column; width:100%; }
  .site-header.open nav.main-nav a{ display:block; padding:14px 24px; }
  .site-header.open .nav-cta{ display:inline-flex; margin:8px 24px 14px; }
  .cta-band{ flex-direction:column; align-items:flex-start; }
  .values-grid{ grid-template-columns:1fr; }
  .tb-grid{ grid-template-columns:1fr; }
}

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *{ transition:none !important; }
}