/* ============================================================
   GTCM — Générale des Travaux du Cameroun S.A
   Feuille de style partagée — direction audacieuse & panafricaine
   ============================================================ */

:root{
  color-scheme: light;
  --laterite:#24306C;      /* bleu marine du logo — marque & accents */
  --laterite-deep:#1A2450;
  --forest:#161F49;        /* marine profond — sections sombres */
  --forest-2:#24306C;
  --savane:#FCB448;        /* or du logo — boutons d'action & accents */
  --gold-deep:#E6A42B;
  --sand:#F6EFE4;
  --sand-2:#EFE5D4;
  --ink:#1A1613;
  --ink-soft:#4A423B;
  --line:#DDCFBB;
  --white:#FFFDF9;
  --maxw:1200px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'Inter',system-ui,sans-serif;
  background:var(--sand);
  color:var(--ink);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{font-family:'Bricolage Grotesque',sans-serif;line-height:1.04;letter-spacing:-.02em;font-weight:700}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px}

/* ---------- BUTTONS ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.6em;
  font-weight:600;font-size:1rem;padding:15px 26px;border-radius:2px;
  transition:transform .15s ease, background .2s ease, color .2s ease, border-color .2s ease;
  cursor:pointer;border:none;font-family:inherit;
}
.btn-primary{background:var(--savane);color:var(--forest)}
.btn-primary:hover{background:var(--gold-deep);transform:translateY(-2px)}
.btn-ghost{background:transparent;color:var(--white);border:1.5px solid rgba(255,255,255,.45)}
.btn-ghost:hover{border-color:var(--savane);color:var(--savane)}
.btn-dark{background:var(--forest);color:var(--white)}
.btn-dark:hover{background:var(--laterite);transform:translateY(-2px)}
.btn-white{background:var(--white);color:var(--laterite-deep)}
.btn-white:hover{background:var(--savane);color:var(--forest);transform:translateY(-2px)}

/* ---------- TOP BAR ---------- */
.topbar{background:var(--forest);color:#C3CBE8;font-size:.82rem}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;height:40px;gap:20px;flex-wrap:wrap}
.topbar a:hover{color:var(--savane)}

/* ---------- HEADER ---------- */
header{position:sticky;top:0;z-index:50;background:rgba(246,239,228,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:76px}
.brand{display:flex;align-items:center;gap:12px}
.brand img{height:52px;width:auto;display:block}
nav.menu{display:flex;gap:30px;align-items:center}
nav.menu a{font-weight:500;font-size:.95rem;position:relative;padding:6px 0}
nav.menu a::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--laterite);transition:width .2s}
nav.menu a:hover::after,nav.menu a.active::after{width:100%}
nav.menu a.active{color:var(--laterite)}
.nav-cta{display:flex;align-items:center;gap:16px}
.burger{display:none;background:none;border:none;cursor:pointer;flex-direction:column;gap:5px}
.burger span{width:26px;height:2px;background:var(--ink)}

/* ---------- PAGE HERO (inner pages) ---------- */
.page-hero{position:relative;background:var(--forest);color:var(--white);overflow:hidden}
.page-hero::before{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(0,0,0,.72),rgba(0,0,0,.38));z-index:1}
.page-hero .bg{position:absolute;inset:0;object-fit:cover;width:100%;height:100%}
.page-hero .wrap{position:relative;z-index:2;padding:84px 28px}
.page-hero .crumb{font-size:.9rem;color:var(--savane);font-weight:500;margin-bottom:16px}
.page-hero h1{font-size:clamp(2.4rem,5vw,3.8rem);font-weight:800;max-width:18ch}
.page-hero p{margin-top:18px;font-size:1.15rem;color:#CDD5EE;max-width:52ch}

/* ---------- HOME HERO ---------- */
.hero{position:relative;background:var(--forest);color:var(--white);overflow:hidden}
.hero .bg{position:absolute;inset:0;object-fit:cover;width:100%;height:100%}
.hero::before{content:"";position:absolute;inset:0;z-index:1;
  background:linear-gradient(105deg, rgba(0,0,0,.8) 0%, rgba(0,0,0,.5) 55%, rgba(0,0,0,.2) 100%);}
.hero .wrap{position:relative;z-index:2;padding:92px 28px 104px;display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:end}
.hero-eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:.9rem;font-weight:500;color:var(--savane);margin-bottom:26px}
.hero-eyebrow .dot{width:8px;height:8px;background:var(--savane);border-radius:50%}
.hero h1{font-size:clamp(2.6rem,6vw,5rem);font-weight:800;max-width:14ch}
.hero h1 em{font-style:normal;color:var(--savane)}
.hero p.lead{margin-top:26px;font-size:1.2rem;color:#CDD5EE;max-width:46ch}
.hero-actions{margin-top:38px;display:flex;gap:16px;flex-wrap:wrap}
.hero-side{border-left:2px solid rgba(252,180,72,.5);padding-left:26px}
.hero-side .kpi{margin-bottom:26px}
.hero-side .kpi:last-child{margin-bottom:0}
.hero-side .kpi b{font-family:'Bricolage Grotesque';font-size:1.5rem;font-weight:700;display:block;color:var(--white)}
.hero-side .kpi span{font-size:.9rem;color:#AEB7DC}

/* ---------- DOMAINS STRIP ---------- */
.domains{background:var(--laterite);color:var(--white)}
.domains .wrap{display:flex;flex-wrap:wrap;gap:8px 36px;padding:18px 28px;align-items:center;justify-content:center;font-weight:600;font-size:.98rem}
.domains s{text-decoration:none;opacity:.5;font-weight:400}

/* ---------- SECTIONS ---------- */
section{padding:92px 0}
.sec-head{max-width:60ch;margin-bottom:52px}
.sec-head .tag{color:var(--laterite);font-weight:600;font-size:.95rem;margin-bottom:14px}
.sec-head h2{font-size:clamp(2rem,4vw,3rem)}
.sec-head p{margin-top:18px;color:var(--ink-soft);font-size:1.1rem}
.bg-white{background:var(--white)}
.bg-sand2{background:var(--sand-2)}

/* ---------- ABOUT BLOCK ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.split h2{font-size:clamp(2rem,4vw,3rem);max-width:16ch;margin-bottom:24px}
.split .tag{color:var(--laterite);font-weight:600;font-size:.95rem;margin-bottom:14px}
.split p{color:var(--ink-soft);font-size:1.08rem;margin-bottom:18px;max-width:52ch}
.visual{position:relative;border-radius:4px;overflow:hidden;min-height:440px}
.visual img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.visual .badge{position:absolute;left:0;bottom:0;z-index:2;background:var(--forest);color:var(--white);padding:26px 30px;max-width:78%}
.visual .badge b{font-family:'Bricolage Grotesque';font-size:1.1rem;display:block;color:var(--savane);margin-bottom:4px}
.visual .badge span{font-size:.92rem;color:#C3CBE8}

/* ---------- SERVICES GRID ---------- */
.svc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.svc{background:var(--white);padding:34px 30px;border:1px solid var(--line);display:flex;flex-direction:column;min-height:250px;transition:border-color .2s, transform .2s}
.svc:hover{border-color:var(--laterite);transform:translateY(-3px)}
.svc .ic{width:46px;height:46px;color:var(--laterite);margin-bottom:22px}
.svc h3{font-size:1.4rem;margin-bottom:10px}
.svc p{color:var(--ink-soft);font-size:.98rem}
.svc.feature{background:var(--forest);color:var(--white);border-color:var(--forest)}
.svc.feature .ic{color:var(--savane)}
.svc.feature p{color:#C3CBE8}

/* ---------- SERVICE DETAIL ROWS ---------- */
.svc-row{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;padding:40px 0;border-bottom:1px solid var(--line)}
.svc-row:last-child{border-bottom:none}
.svc-row.rev .svc-visual{order:-1}
.svc-row h3{font-size:1.9rem;margin-bottom:14px}
.svc-row p{color:var(--ink-soft);font-size:1.05rem}
.svc-visual{border-radius:4px;overflow:hidden;min-height:300px}
.svc-visual img{width:100%;height:100%;min-height:300px;object-fit:cover}
.svc-num{font-family:'Bricolage Grotesque';color:var(--savane);font-weight:700;font-size:1rem;margin-bottom:8px}

/* ---------- PROJECTS ---------- */
.proj-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.proj{position:relative;border-radius:4px;overflow:hidden;min-height:320px;color:var(--white);display:flex;align-items:flex-end}
.proj img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.proj::after{content:"";position:absolute;inset:0;background:linear-gradient(to top,rgba(0,0,0,.85),rgba(0,0,0,0) 65%)}
.proj .meta{position:relative;z-index:2;padding:28px}
.proj .cat{font-size:.82rem;color:var(--savane);font-weight:600;margin-bottom:8px}
.proj h3{font-size:1.4rem}
.proj .loc{font-size:.9rem;color:#C3CBE8;margin-top:6px}
.note{margin-top:26px;font-size:.92rem;color:var(--ink-soft);font-style:italic}

/* ---------- PARTNER ---------- */
.partner-cards{display:flex;gap:16px;flex-wrap:wrap}
.pcard{background:var(--forest-2);border:1px solid rgba(252,180,72,.25);padding:28px;border-radius:4px;flex:1;min-width:200px}
.pcard b{font-family:'Bricolage Grotesque';font-size:1.3rem;display:block;margin-bottom:6px;color:var(--white)}
.pcard span{font-size:.9rem;color:#A6AFD4}
.on-forest{background:var(--forest);color:var(--white)}
.on-forest .tag{color:var(--savane)}
.on-forest h2{color:var(--white)}
.on-forest p{color:#C3CBE8}

/* ---------- CAREERS ---------- */
.careers-visual{background:var(--laterite);color:var(--white);padding:44px;border-radius:4px}
.careers-visual h3{font-size:1.6rem;margin-bottom:14px}
.careers-visual ul{list-style:none;margin:22px 0 0}
.careers-visual li{padding:12px 0;border-bottom:1px solid rgba(255,255,255,.2);display:flex;justify-content:space-between;font-size:.98rem}
.careers-visual li:last-child{border:none}

/* ---------- VALUES ---------- */
.values{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.value{background:var(--white);border:1px solid var(--line);padding:30px;border-top:3px solid var(--laterite)}
.value h3{font-size:1.3rem;margin-bottom:10px}
.value p{color:var(--ink-soft);font-size:.97rem}

/* ---------- FORM ---------- */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.field{margin-bottom:18px}
.field label{display:block;font-size:.9rem;font-weight:600;margin-bottom:6px}
.field input,.field select,.field textarea{
  width:100%;padding:13px 14px;border:1px solid var(--line);border-radius:2px;
  font-family:inherit;font-size:1rem;background:var(--white);color:var(--ink);
}
.field input:focus,.field select:focus,.field textarea:focus{outline:2px solid var(--laterite);border-color:var(--laterite)}
.field textarea{min-height:130px;resize:vertical}
.contact-info{background:var(--forest);color:var(--white);padding:40px;border-radius:4px}
.contact-info h3{color:var(--savane);margin-bottom:22px}
.contact-info .row{display:flex;gap:14px;padding:14px 0;border-bottom:1px solid rgba(255,255,255,.15);font-size:.98rem;color:#CDD5EE}
.contact-info .row:last-child{border:none}
.contact-info .row b{color:var(--white);font-family:'Inter';font-weight:600;display:block}

/* ---------- CTA ---------- */
.cta{background:var(--laterite);color:var(--white);text-align:center}
.cta h2{font-size:clamp(2.2rem,5vw,3.4rem);max-width:20ch;margin:0 auto 20px;color:var(--white)}
.cta p{color:#DBE0F3;font-size:1.15rem;max-width:50ch;margin:0 auto 36px}
.cta-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}

/* ---------- FOOTER ---------- */
footer{background:var(--forest);color:#AEB7DC;padding:72px 0 32px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px;border-bottom:1px solid rgba(255,255,255,.12)}
footer h4{color:var(--white);font-size:1rem;margin-bottom:18px;font-family:'Bricolage Grotesque'}
footer ul{list-style:none}
footer li{margin-bottom:10px;font-size:.94rem}
footer a:hover{color:var(--savane)}
.foot-brand{display:inline-flex;align-items:center;margin-bottom:18px;background:var(--white);padding:12px 16px;border-radius:4px}
.foot-brand img{height:46px;width:auto;display:block}
.foot-bottom{padding-top:26px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:.86rem;color:#8089B0}

/* ---------- WHATSAPP FLOAT ---------- */
.wa{position:fixed;right:22px;bottom:22px;z-index:60;background:#25D366;color:#fff;width:58px;height:58px;border-radius:50%;display:grid;place-items:center;box-shadow:0 8px 24px rgba(0,0,0,.25);transition:transform .2s}
.wa:hover{transform:scale(1.08)}

/* ---------- BACK TO TOP ---------- */
.totop{position:fixed;right:22px;bottom:90px;z-index:60;background:var(--laterite);color:var(--white);width:50px;height:50px;border:none;border-radius:50%;display:grid;place-items:center;cursor:pointer;box-shadow:0 8px 24px rgba(0,0,0,.25);
  opacity:0;visibility:hidden;transform:translateY(10px);transition:opacity .25s ease, transform .25s ease, background .2s ease}
.totop.show{opacity:1;visibility:visible;transform:translateY(0)}
.totop:hover{background:var(--savane);color:var(--forest)}
.totop svg{width:22px;height:22px}

/* ---------- RESPONSIVE ---------- */
@media(max-width:900px){
  .hero .wrap{grid-template-columns:1fr;gap:40px;padding:64px 28px 72px}
  .hero-side{border-left:none;border-top:2px solid rgba(252,180,72,.5);padding-left:0;padding-top:28px;display:flex;gap:30px;flex-wrap:wrap}
  .split,.form-grid{grid-template-columns:1fr;gap:36px}
  .svc-grid,.values{grid-template-columns:1fr 1fr}
  .proj-grid{grid-template-columns:1fr 1fr}
  .svc-row{grid-template-columns:1fr;gap:24px}
  .svc-row.rev .svc-visual{order:0}
  nav.menu,.nav-cta .btn{display:none}
  .burger{display:flex}
  .foot-grid{grid-template-columns:1fr 1fr;gap:30px}
}
@media(max-width:560px){
  .svc-grid,.values,.proj-grid{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .topbar{display:none}
}

/* ---------- PETITS ÉCRANS (téléphones d'entrée de gamme) ---------- */
@media(max-width:480px){
  html,body{overflow-x:hidden;max-width:100%}
  .wrap{padding:0 18px}
  section{padding:56px 0}
  .nav{height:66px}
  .brand img{height:40px}

  /* Hero & bannières : plus compacts, titres adaptés */
  .hero .wrap{padding:48px 18px 56px;gap:30px}
  .hero h1{font-size:2.1rem}
  .hero p.lead{font-size:1.05rem}
  .page-hero .wrap{padding:56px 18px}
  .page-hero h1{font-size:1.9rem}
  .page-hero p{font-size:1.02rem}
  .hero-side{gap:22px}
  .hero-side .kpi b{font-size:1.25rem}

  /* En-têtes de section */
  .sec-head{margin-bottom:36px}
  .sec-head h2,.split h2,.cta h2,.careers-visual h3{font-size:1.7rem}
  .svc-row h3{font-size:1.5rem}

  /* Boutons : pleine largeur = cibles tactiles généreuses */
  .btn{width:100%;justify-content:center;padding:15px 20px}
  .hero-actions,.cta-actions{flex-direction:column;gap:12px;width:100%}
  .hero-actions .btn,.cta-actions .btn{width:100%}

  /* Cartes & visuels : marges internes réduites */
  .svc{padding:28px 22px;min-height:0}
  .visual{min-height:300px}
  .svc-visual img{min-height:220px}
  .careers-visual,.contact-info,.pcard{padding:28px 22px}
  .partner-cards{flex-direction:column}
  .pcard{min-width:0}
  img{height:auto}

  /* Boutons flottants un peu plus proches du bord */
  .wa{right:16px;bottom:16px;width:52px;height:52px}
  .totop{right:16px;bottom:78px;width:46px;height:46px}
}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto}}