/* ============================================================
   DELTA CORE SARL — Design tokens
   Palette dérivée du logo : bleu acier, noir métal, étincelle de soudure
   ============================================================ */
:root{
  --navy-900:#0a1730;
  --navy-800:#0f2140;
  --navy-700:#173768;
  --blue-500:#2d6fd6;
  --blue-400:#4a8ef0;
  --steel-700:#2a2f38;
  --steel-400:#8b93a1;
  --steel-200:#d6dae0;
  --steel-100:#eef0f3;
  --paper:#f7f7f5;
  --ink-900:#12151a;
  --spark-500:#f2762e;
  --spark-400:#ff9a54;
  --white:#ffffff;

  --font-display:"Oswald", "Arial Narrow", sans-serif;
  --font-body:"Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --radius:2px;
  --container-w:1180px;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-body);
  color:var(--ink-900);
  background:var(--paper);
  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(--font-display);
  text-transform:uppercase;
  letter-spacing:0.02em;
  line-height:1.15;
  margin:0 0 .5em;
  color:var(--navy-900);
}
p{margin:0 0 1em;}
.container{max-width:var(--container-w);margin:0 auto;padding:0 24px;}
.muted{color:var(--steel-400);}

.skip-link{
  position:absolute;left:-999px;top:0;background:var(--spark-500);color:#fff;
  padding:10px 16px;z-index:1000;
}
.skip-link:focus{left:12px;top:12px;}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:var(--white);
  border-bottom:3px solid var(--spark-500);
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  height:76px;gap:24px;
}
.brand{display:inline-flex;align-items:center;}
.brand-logo{
  height:150px;width:auto;display:block;
  
}
.main-nav{display:flex;gap:28px;align-items:center;}
.main-nav a{
  color:var(--ink-900);font-family:var(--font-display);
  font-size:14px;letter-spacing:.06em;text-transform:uppercase;
  padding:8px 2px;border-bottom:2px solid transparent;transition:.2s;
}
.main-nav a:hover,.main-nav a.active{color:#040404;border-color:var(--spark-500);}
.main-nav a.nav-cta{
  background:var(--spark-500);color:#0f0f0f;padding:9px 18px;border-radius:var(--radius);
  border-bottom:none;
}
.main-nav a.nav-cta:hover{background:var(--spark-400);}
.header-tools{display:flex;align-items:center;gap:16px;}
.lang-form{display:flex;gap:4px;background:rgba(255,255,255,.08);padding:3px;border-radius:3px;}
.lang-btn{
  background:none;border:none;color:var(--steel-200);font-family:var(--font-display);
  font-size:12px;padding:6px 10px;cursor:pointer;letter-spacing:.05em;border-radius:2px;
}
.lang-btn.is-active{background:var(--spark-500);color:#050505;}
.burger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:6px;}
.burger span{width:24px;height:2px;background:#000000;display:block;}

/* ---------- Hero ---------- */
.hero{
  position:relative;background:var(--navy-900);color:#fff;
  padding:110px 0 130px;overflow:hidden;
}
.hero-bg{
    position:absolute;inset:0;z-index:0;
    background-image:url('../images/page.png');
    background-size:cover;
    background-position:center;
    background-repeat:no-repeat;
    animation:heroZoom 20s ease-out forwards;
}

.hero-inner{position:relative;z-index:2;max-width:760px;text-align:left;margin-left: 0 !important;}
.eyebrow{
  font-family:var(--font-display);text-transform:uppercase;letter-spacing:.18em;
  color:var(--spark-400);font-size:13px;margin-bottom:14px;
}
.hero-title{
  color:#fff;font-size:clamp(2.2rem,5vw,3.6rem);margin-bottom:22px;
}
.weld-line{position:relative;display:inline-block;color:var(--spark-400);}
.weld-spark{
  width:22px;height:22px;fill:var(--spark-400);position:absolute;right:-30px;top:6px;
  animation:spark-pulse 1.6s ease-in-out infinite;
}
@keyframes spark-pulse{
  0%,100%{opacity:.55;transform:scale(.85) rotate(0deg);}
  50%{opacity:1;transform:scale(1.15) rotate(12deg);}
}
.hero-sub{color:#000000;font-weight: 700; font-size:1.05rem;max-width:600px;text-shadow: 0px 0px 4px rgba(255,255,255,0.6);}
.hero-actions{display:flex;gap:16px;margin-top:32px;flex-wrap:wrap;justify-content:flex-start !important;}

.btn{
  display:inline-block;font-family:var(--font-display);text-transform:uppercase;
  letter-spacing:.05em;font-size:14px;padding:14px 26px;border-radius:var(--radius);
  transition:.2s;border:2px solid transparent;
}
.btn-spark{background:var(--spark-500);color:#fff;}
.btn-spark:hover{background:var(--spark-400);transform:translateY(-1px);}
.btn-outline{border-color:rgba(255,255,255,.4);color:#fff;}
.btn-outline:hover{border-color:#fff;background:rgba(255,255,255,.08);}
.btn.full{width:100%;text-align:center;border:none;cursor:pointer;font-size:15px;}

/* ---------- Strip ---------- */
.strip{background:var(--steel-700);color:#fff;padding:18px 0;}
.strip-inner{
  display:grid;grid-template-columns:repeat(4,1fr);gap:12px;text-align:center;
  font-family:var(--font-display);font-size:13px;letter-spacing:.04em;text-transform:uppercase;
}
.strip-inner div{border-left:2px solid var(--spark-500);padding-left:12px;}
.strip-inner div:first-child{border-left:none;}

/* ---------- Sections ---------- */
.section{padding:80px 0;}
.section-dark{background:var(--navy-900);color:#fff;}
.section-dark h2,.section-dark .eyebrow{color:#fff;}
.section-muted{background:var(--steel-100);}
.section-title{font-size:clamp(1.6rem,3vw,2.3rem);margin-bottom:36px;}
.section-title.small{font-size:1.4rem;margin-bottom:18px;}
.page-lead{color:var(--steel-400);max-width:620px;font-size:1.05rem;}

.cards-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-bottom:28px;}
.card{
  background:#fff;border:1px solid var(--steel-200);padding:28px 22px;border-radius:var(--radius);
  border-top:3px solid var(--blue-500);transition:.2s;
}
.card:hover{transform:translateY(-4px);box-shadow:0 12px 24px rgba(10,23,48,.08);}
.card h3{font-size:1.05rem;margin-bottom:10px;}
.card p{color:var(--steel-400);font-size:.92rem;margin:0;}
.card-icon{width:44px;height:44px;margin-bottom:16px;border-radius:50%;background:var(--navy-900);position:relative;}
.card-icon::after{content:"";position:absolute;inset:12px;background:var(--spark-500);border-radius:1px;}

.link-arrow{
  display:inline-block;font-family:var(--font-display);text-transform:uppercase;
  letter-spacing:.05em;font-size:14px;color:var(--blue-500);border-bottom:2px solid var(--blue-500);
  padding-bottom:2px;
}
.link-arrow.light{color:var(--spark-400);border-color:var(--spark-400);}

/* ---------- Gallery ---------- */
.gallery-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:24px;}
.gallery-grid.full{grid-template-columns:repeat(3,1fr);}
.gallery-item{position:relative;overflow:hidden;border-radius:var(--radius);background:var(--steel-700);}
.gallery-item img{width:100%;height:230px;object-fit:cover;transition:.3s;}
.gallery-item:hover img{transform:scale(1.06);}
.gallery-placeholder,.gallery-video-placeholder{
  height:230px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--steel-700),var(--navy-800));color:var(--steel-200);
}
.gallery-video-placeholder a{color:var(--spark-400);font-family:var(--font-display);}
.gallery-item figcaption{
  position:absolute;left:0;right:0;bottom:0;padding:12px 14px;
  background:linear-gradient(to top, rgba(0,0,0,.8), transparent);
  color:#fff;font-size:.88rem;font-family:var(--font-display);letter-spacing:.02em;
}

.gallery-filters{display:flex;gap:10px;flex-wrap:wrap;margin:24px auto 0;}
.filter-chip{
  border:1px solid var(--steel-200);padding:8px 16px;border-radius:20px;font-size:13px;
  font-family:var(--font-display);text-transform:uppercase;letter-spacing:.04em;
}
.filter-chip.is-active{background:var(--navy-900);color:#fff;border-color:var(--navy-900);}

/* ---------- CTA band ---------- */
.cta-band{background:var(--navy-700);color:#fff;padding:64px 0;text-align:center;}
.cta-inner h2{color:#fff;margin-bottom:18px;}
.cta-inner p{color:var(--steel-200);max-width:520px;margin:0 auto 24px;}

/* ---------- Page header ---------- */
.page-header{background:var(--steel-100);padding:70px 0 44px;border-bottom:3px solid var(--spark-500);}
.page-header h1{font-size:clamp(2rem,4vw,2.8rem);margin-bottom:8px;}

/* ---------- Two-col / about ---------- */
.two-col{display:grid;grid-template-columns:1.3fr 1fr;gap:56px;align-items:start;}
.stat-block{display:flex;flex-direction:column;gap:24px;}
.stat{background:var(--navy-900);color:#fff;padding:26px;border-left:4px solid var(--spark-500);}
.stat-num{display:block;font-family:var(--font-display);font-size:2.4rem;color:var(--spark-400);}
.stat-label{font-size:.85rem;color:var(--steel-200);text-transform:uppercase;letter-spacing:.04em;}

.team-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.team-card{text-align:center;}
.team-card img,.team-placeholder{
  width:100%;aspect-ratio:1;object-fit:cover;border-radius:50%;margin-bottom:14px;
  background:var(--steel-200);
}
.team-card h3{font-size:1rem;margin-bottom:2px;}
.team-card p{color:var(--steel-400);font-size:.85rem;}

/* ---------- Services list ---------- */
.services-list{display:flex;flex-direction:column;gap:2px;}
.service-row{
  display:grid;grid-template-columns:70px 1fr auto;gap:24px;align-items:center;
  padding:32px 0;border-bottom:1px solid var(--steel-200);
}
.service-row-icon{width:56px;height:56px;background:var(--navy-900);border-radius:50%;position:relative;}
.service-row-icon::after{content:"";position:absolute;inset:16px;background:var(--spark-500);}
.service-row-body h2{font-size:1.3rem;margin-bottom:8px;}
.service-row-body p{color:var(--steel-400);margin:0;max-width:620px;}
.service-row-img{width:120px;height:90px;object-fit:cover;border-radius:var(--radius);}

/* ---------- Contact ---------- */
.contact-grid{align-items:flex-start;}
.info-list{list-style:none;margin:0 0 28px;padding:0;}
.info-list li{display:flex;flex-direction:column;padding:14px 0;border-bottom:1px solid var(--steel-200);}
.info-list li span{font-size:.75rem;text-transform:uppercase;letter-spacing:.06em;color:var(--steel-400);}
.info-list li strong{font-size:1rem;margin-top:2px;}
.map-placeholder{
  background:var(--steel-100);border:1px dashed var(--steel-400);padding:24px;
  color:var(--steel-400);font-size:.9rem;border-radius:var(--radius);
}
.map-embed iframe{border-radius:var(--radius);}

.contact-form{background:#fff;border:1px solid var(--steel-200);padding:32px;border-radius:var(--radius);}
.form-group{margin-bottom:18px;}
.form-group label{
  display:block;font-family:var(--font-display);font-size:.8rem;text-transform:uppercase;
  letter-spacing:.04em;margin-bottom:6px;color:var(--navy-900);
}
.form-group input,.form-group textarea,.form-control{
  width:100%;padding:12px 14px;border:1px solid var(--steel-200);border-radius:var(--radius);
  font-family:var(--font-body);font-size:.95rem;background:var(--paper);
}
.form-group input:focus,.form-group textarea:focus{outline:2px solid var(--blue-500);border-color:var(--blue-500);}
.field-error{color:#c0392b;font-size:.82rem;margin:4px 0 0;}

.alert{padding:14px 18px;border-radius:var(--radius);margin:20px 0;font-size:.95rem;}
.alert-success{background:#e6f4ea;color:#1e6b34;border:1px solid #b8e0c4;}
.alert-error,.alert-warning{background:#fdecea;color:#a12b1f;border:1px solid #f3c3bd;}

/* ---------- Footer ---------- */
.site-footer{background:var(--navy-900);color:var(--steel-200);padding:60px 0 0;margin-top:60px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;padding-bottom:40px;}
.footer-logo{
  height:120px;margin-bottom:14px;display:inline-block;
  background:#fff;padding:2px 6px;border-radius:4px;
}
.footer-brand p{font-size:.88rem;color:var(--steel-400);}
.footer-col h4{color:#fff;font-size:.95rem;margin-bottom:14px;}
.footer-col a,.footer-col p{display:block;font-size:.9rem;color:var(--steel-200);margin-bottom:8px;}
.footer-col a:hover{color:var(--spark-400);}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:18px 24px;font-size:.8rem;color:var(--steel-400);}

/* ---------- Responsive ---------- */
@media (max-width:960px){
  .cards-grid{grid-template-columns:repeat(2,1fr);}
  .gallery-grid,.gallery-grid.full{grid-template-columns:repeat(2,1fr);}
  .team-grid{grid-template-columns:repeat(2,1fr);}
  .two-col{grid-template-columns:1fr;}
  .strip-inner{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:720px){
  .main-nav{
    position:fixed;top:76px;left:0;right:0;background:var(--navy-900);
    flex-direction:column;padding:20px 24px;gap:4px;
    transform:translateY(-120%);transition:.25s;border-bottom:3px solid var(--spark-500);
  }
  .main-nav.is-open{transform:translateY(0);}
  .main-nav a{width:100%;padding:12px 0;}
  .burger{display:flex;}
  .cards-grid,.gallery-grid,.gallery-grid.full,.team-grid{grid-template-columns:1fr;}
  .strip-inner{grid-template-columns:1fr;text-align:left;}
  .strip-inner div{border-left:none;border-top:2px solid var(--spark-500);padding:8px 0 0;}
  .service-row{grid-template-columns:56px 1fr;}
  .service-row-img{display:none;}
  .footer-grid{grid-template-columns:1fr;}
}
@media (prefers-reduced-motion:reduce){
  .weld-spark{animation:none;}
  html{scroll-behavior:auto;}
}