/* ==========================================================================
   ISTANBUL GROUP INTERNATIONAL (IGI) — Feuille de style principale
   ========================================================================== */

:root{
  --navy-950:#050c17;
  --navy-900:#0a1b30;
  --navy-800:#0d2440;
  --navy-700:#12335c;
  --navy-600:#1a4576;
  --gold-500:#c9a227;
  --gold-400:#e0bc4d;
  --gold-100:#f6ecc9;
  --white:#ffffff;
  --off-white:#f5f6f8;
  --gray-100:#eceef1;
  --gray-300:#c7ccd3;
  --gray-500:#7d8794;
  --gray-700:#454e5a;
  --gray-900:#1b2027;
  --radius:6px;
  --shadow-sm:0 2px 10px rgba(5,12,23,.08);
  --shadow-md:0 12px 32px rgba(5,12,23,.14);
  --shadow-lg:0 24px 60px rgba(5,12,23,.24);
  --ff-head:"Playfair Display", Georgia, "Times New Roman", serif;
  --ff-body:"Inter", "Segoe UI", Arial, sans-serif;
  --container:1240px;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--ff-body);
  color:var(--gray-900);
  background:var(--white);
  line-height:1.65;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}
h1,h2,h3,h4{font-family:var(--ff-head);font-weight:700;line-height:1.2;color:var(--navy-900)}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
section{padding:88px 0}
.section-tight{padding:56px 0}
.bg-off{background:var(--off-white)}
.bg-navy{background:var(--navy-900);color:var(--white)}
.bg-navy h1,.bg-navy h2,.bg-navy h3{color:var(--white)}

/* ---------- Eyebrow / kicker ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:13px;letter-spacing:2.5px;text-transform:uppercase;
  color:var(--gold-500);font-weight:700;margin-bottom:14px;
}
.eyebrow::before{content:"";width:34px;height:2px;background:var(--gold-500)}
.bg-navy .eyebrow{color:var(--gold-400)}

.section-head{max-width:720px;margin-bottom:48px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-head h2{font-size:clamp(28px,3.4vw,42px);margin-bottom:14px}
.section-head p{color:var(--gray-700);font-size:17px}
.bg-navy .section-head p{color:var(--gray-300)}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:15px 30px;border-radius:2px;font-weight:600;font-size:14.5px;
  letter-spacing:.4px;text-transform:uppercase;transition:.25s ease;
  border:1.5px solid transparent;
}
.btn-gold{background:var(--gold-500);color:var(--navy-950)}
.btn-gold:hover{background:var(--gold-400);transform:translateY(-2px);box-shadow:var(--shadow-md)}
.btn-outline{border-color:rgba(255,255,255,.55);color:var(--white)}
.btn-outline:hover{background:rgba(255,255,255,.12);border-color:var(--white)}
.btn-navy{background:var(--navy-900);color:var(--white)}
.btn-navy:hover{background:var(--navy-700)}
.btn-line{border-color:var(--navy-900);color:var(--navy-900)}
.btn-line:hover{background:var(--navy-900);color:var(--white)}

/* ---------- Top info bar ---------- */
.topbar{
  background:var(--navy-950);color:var(--gray-300);font-size:13.5px;
}
.topbar .container{display:flex;justify-content:space-between;align-items:center;padding-top:9px;padding-bottom:9px;flex-wrap:wrap;gap:8px}
.topbar-left{display:flex;gap:22px;flex-wrap:wrap}
.topbar a{color:var(--gray-300)}
.topbar a:hover{color:var(--gold-400)}
.topbar-left span, .topbar-left a{display:inline-flex;align-items:center;gap:7px}
.topbar-phones{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- Header / nav ---------- */
header.site-header{
  position:sticky;top:0;z-index:1000;background:var(--white);
  box-shadow:0 1px 0 rgba(5,12,23,.08);transition:.25s ease;
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;padding:16px 0}
.logo{display:flex;align-items:center;gap:12px}
.logo-mark{
  width:52px;height:52px;border-radius:3px;background:var(--navy-900);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--ff-head);color:var(--gold-400);font-weight:700;font-size:20px;letter-spacing:1px;
  flex-shrink:0;
}
.logo-text{display:flex;flex-direction:column;line-height:1.15}
.logo-text .full{font-family:var(--ff-head);font-weight:700;font-size:16px;color:var(--navy-900);letter-spacing:.3px}
.logo-text .baseline{font-size:11px;letter-spacing:1.6px;text-transform:uppercase;color:var(--gold-500);font-weight:600}

nav.main-nav{display:flex;align-items:center;gap:2px}
nav.main-nav > ul{display:flex;align-items:center;gap:2px}
nav.main-nav a.nav-link{
  display:block;padding:12px 16px;font-size:14.5px;font-weight:600;color:var(--navy-900);
  border-bottom:2px solid transparent;transition:.2s;
}
nav.main-nav a.nav-link:hover, nav.main-nav li.active > a.nav-link{
  color:var(--gold-500);border-color:var(--gold-500);
}
li.has-dropdown{position:relative}
.dropdown{
  position:absolute;top:100%;left:0;min-width:240px;background:var(--white);
  box-shadow:var(--shadow-lg);border-top:3px solid var(--gold-500);
  opacity:0;visibility:hidden;transform:translateY(8px);transition:.2s ease;padding:8px 0;
}
li.has-dropdown:hover .dropdown{opacity:1;visibility:visible;transform:translateY(0)}
.dropdown a{display:block;padding:12px 20px;font-size:14px;font-weight:600;color:var(--navy-800)}
.dropdown a:hover{background:var(--off-white);color:var(--gold-500)}
.nav-cta{margin-left:14px}
.nav-toggle{display:none;flex-direction:column;gap:5px;width:30px}
.nav-toggle span{height:2px;background:var(--navy-900);display:block;transition:.2s}

/* ---------- Hero ---------- */
.hero{
  position:relative;color:var(--white);display:flex;align-items:center;
  min-height:78vh;background-size:cover;background-position:center;overflow:hidden;
}
.hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(5,12,23,.92) 10%,rgba(5,12,23,.62) 55%,rgba(5,12,23,.35) 100%);
}
.hero .container{position:relative;z-index:2}
.hero-inner{max-width:680px}
.hero .eyebrow{color:var(--gold-400)}
.hero h1{font-size:clamp(34px,5.4vw,60px);color:var(--white);margin-bottom:20px}
.hero p{font-size:18px;color:var(--gray-100);max-width:560px;margin-bottom:34px}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}

.page-hero{min-height:44vh}
.page-hero h1{font-size:clamp(30px,4.4vw,46px)}
.breadcrumb{display:flex;gap:8px;font-size:13.5px;color:var(--gray-300);margin-top:16px}
.breadcrumb a:hover{color:var(--gold-400)}

/* ---------- Stats band ---------- */
.stats-band{background:var(--navy-900);color:var(--white)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;text-align:center}
.stat-item .num{font-family:var(--ff-head);font-size:clamp(32px,4vw,50px);color:var(--gold-400);font-weight:700}
.stat-item .num sup{font-size:22px;top:-.6em}
.stat-item .label{font-size:14px;letter-spacing:.6px;text-transform:uppercase;color:var(--gray-300);margin-top:8px}

/* ---------- Cards / grids ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:30px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:26px}

.metier-card{
  background:var(--white);border:1px solid var(--gray-100);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow-sm);transition:.25s;display:flex;flex-direction:column;
}
.metier-card:hover{box-shadow:var(--shadow-md);transform:translateY(-4px)}
.metier-card .img{aspect-ratio:4/3;overflow:hidden}
.metier-card .img img{width:100%;height:100%;object-fit:cover;transition:.4s}
.metier-card:hover .img img{transform:scale(1.06)}
.metier-card .body{padding:26px}
.metier-card .num{color:var(--gold-500);font-weight:700;font-size:13px;letter-spacing:1px}
.metier-card h3{font-size:20px;margin:8px 0 10px}
.metier-card p{color:var(--gray-700);font-size:14.5px}

.value-card{padding:30px 26px;background:var(--white);border-radius:var(--radius);border:1px solid var(--gray-100);box-shadow:var(--shadow-sm)}
.value-card .icon{
  width:52px;height:52px;border-radius:50%;background:var(--gold-100);color:var(--gold-500);
  display:flex;align-items:center;justify-content:center;font-size:22px;font-weight:700;margin-bottom:18px;
}
.value-card h3{font-size:18px;margin-bottom:8px}
.value-card p{color:var(--gray-700);font-size:14.5px}

/* ---------- Project gallery ---------- */
.filters{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:38px}
.filter-btn{
  padding:10px 20px;border:1.5px solid var(--gray-300);border-radius:30px;font-size:13.5px;
  font-weight:600;letter-spacing:.3px;color:var(--gray-700);transition:.2s;
}
.filter-btn:hover{border-color:var(--gold-500);color:var(--gold-500)}
.filter-btn.active{background:var(--navy-900);border-color:var(--navy-900);color:var(--white)}

.project-card{
  position:relative;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);
  aspect-ratio:4/3;color:var(--white);transition:.3s;
}
.project-card img{width:100%;height:100%;object-fit:cover;transition:.5s ease}
.project-card:hover img{transform:scale(1.08)}
.project-card .overlay{
  position:absolute;inset:0;background:linear-gradient(180deg,rgba(5,12,23,0) 40%,rgba(5,12,23,.92) 100%);
  display:flex;flex-direction:column;justify-content:flex-end;padding:22px;
}
.project-card .tag{
  align-self:flex-start;background:var(--gold-500);color:var(--navy-950);font-size:11.5px;
  font-weight:700;letter-spacing:.6px;text-transform:uppercase;padding:5px 11px;border-radius:2px;margin-bottom:auto;
}
.project-card .status-done{background:#3fa15e;color:#fff}
.project-card .status-cours{background:var(--gold-500);color:var(--navy-950)}
.project-card h3{color:var(--white);font-size:19px;margin-bottom:4px}
.project-card .loc{font-size:13px;color:var(--gray-300)}

.progress{height:6px;background:rgba(255,255,255,.25);border-radius:6px;margin-top:12px;overflow:hidden}
.progress > span{display:block;height:100%;background:var(--gold-500);border-radius:6px}
.progress-label{display:flex;justify-content:space-between;font-size:12px;color:var(--gray-300);margin-top:6px}

/* ---------- News cards ---------- */
.news-card{background:var(--white);border:1px solid var(--gray-100);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);transition:.25s}
.news-card:hover{box-shadow:var(--shadow-md);transform:translateY(-4px)}
.news-card .img{aspect-ratio:16/10;overflow:hidden}
.news-card .img img{width:100%;height:100%;object-fit:cover}
.news-card .body{padding:24px}
.news-card .date{font-size:12.5px;color:var(--gold-500);font-weight:700;letter-spacing:.5px;text-transform:uppercase;margin-bottom:10px}
.news-card h3{font-size:18px;margin-bottom:10px}
.news-card p{color:var(--gray-700);font-size:14.5px;margin-bottom:14px}
.read-more{font-size:13.5px;font-weight:700;color:var(--navy-900);letter-spacing:.3px}
.read-more:hover{color:var(--gold-500)}

/* ---------- About / split sections ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.split img{border-radius:var(--radius);box-shadow:var(--shadow-md)}
.split .frame{position:relative}
.split .frame::before{
  content:"";position:absolute;top:-18px;left:-18px;width:90%;height:90%;
  border:3px solid var(--gold-500);border-radius:var(--radius);z-index:-1;
}
.check-list li{display:flex;gap:12px;margin-bottom:12px;font-size:15px;color:var(--gray-700)}
.check-list li::before{content:"✓";color:var(--gold-500);font-weight:700}

/* ---------- Quote / CTA ---------- */
.quote-block{max-width:780px;margin:0 auto;text-align:center}
.quote-block q{font-family:var(--ff-head);font-size:clamp(22px,2.6vw,30px);font-style:italic;line-height:1.5;color:var(--white)}
.quote-block .who{margin-top:22px;color:var(--gold-400);font-weight:700;letter-spacing:.4px;text-transform:uppercase;font-size:13px}

.cta-band{
  background:linear-gradient(120deg,var(--navy-950),var(--navy-800));color:var(--white);
  border-radius:var(--radius);padding:56px;display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap;
}
.cta-band h2{color:var(--white);font-size:28px;max-width:520px}
.cta-band p{color:var(--gray-300);margin-top:8px}

/* ---------- Contact ---------- */
.contact-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:56px}
.contact-info-card{background:var(--navy-900);color:var(--white);padding:42px;border-radius:var(--radius)}
.contact-info-card h3{color:var(--white);font-size:20px;margin-bottom:22px}
.contact-line{display:flex;gap:14px;margin-bottom:22px;font-size:14.5px}
.contact-line .ic{
  width:38px;height:38px;flex-shrink:0;border-radius:50%;background:rgba(201,162,39,.18);
  color:var(--gold-400);display:flex;align-items:center;justify-content:center;font-weight:700;
}
.contact-line .lines a, .contact-line .lines span{display:block;color:var(--gray-300)}
.contact-line .lines strong{display:block;color:var(--white);margin-bottom:4px}
.phone-grid{display:grid;grid-template-columns:1fr 1fr;gap:4px 14px}

.form-card{background:var(--white);border:1px solid var(--gray-100);border-radius:var(--radius);padding:42px;box-shadow:var(--shadow-sm)}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-bottom:18px}
.field{display:flex;flex-direction:column;gap:8px}
.field.full{grid-column:1/-1}
.field label{font-size:13px;font-weight:700;color:var(--navy-900);letter-spacing:.3px}
.field input, .field select, .field textarea{
  border:1.5px solid var(--gray-300);border-radius:3px;padding:13px 14px;font-size:14.5px;font-family:inherit;
  color:var(--gray-900);transition:.2s;
}
.field input:focus, .field select:focus, .field textarea:focus{outline:none;border-color:var(--gold-500)}
.map-frame{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);border:0;width:100%;height:380px}

/* ---------- Jobs ---------- */
.job-item{
  display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap;
  padding:26px 28px;border:1px solid var(--gray-100);border-radius:var(--radius);margin-bottom:16px;transition:.2s;
}
.job-item:hover{border-color:var(--gold-500);box-shadow:var(--shadow-sm)}
.job-item h3{font-size:18px;margin-bottom:6px}
.job-item .meta{font-size:13.5px;color:var(--gray-500);display:flex;gap:14px;flex-wrap:wrap}

/* ---------- Footer ---------- */
footer.site-footer{background:var(--navy-950);color:var(--gray-300)}
.footer-top{padding:72px 0 40px;display:grid;grid-template-columns:1.3fr 1fr 1fr 1.2fr;gap:40px}
.footer-top h4{color:var(--white);font-size:15px;letter-spacing:.5px;text-transform:uppercase;margin-bottom:22px}
.footer-about .logo{margin-bottom:18px}
.footer-about p{font-size:14px;color:var(--gray-500);margin-bottom:18px}
.social-row{display:flex;gap:10px}
.social-row a{
  width:36px;height:36px;border:1px solid rgba(255,255,255,.2);border-radius:50%;
  display:flex;align-items:center;justify-content:center;font-size:13px;color:var(--gray-300);transition:.2s;
}
.social-row a:hover{background:var(--gold-500);border-color:var(--gold-500);color:var(--navy-950)}
.footer-links li{margin-bottom:12px}
.footer-links a{font-size:14px;color:var(--gray-300)}
.footer-links a:hover{color:var(--gold-400)}
.footer-contact li{display:flex;gap:10px;font-size:14px;margin-bottom:14px;color:var(--gray-300)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:22px 0;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px;font-size:13px;color:var(--gray-500)}
.footer-bottom a:hover{color:var(--gold-400)}

/* ---------- Misc ---------- */
.badge-note{
  display:inline-block;margin-top:18px;padding:10px 16px;font-size:12.5px;background:var(--gold-100);
  color:var(--navy-900);border-left:3px solid var(--gold-500);border-radius:2px;
}
.back-top{
  position:fixed;right:26px;bottom:26px;width:46px;height:46px;background:var(--navy-900);color:var(--gold-400);
  border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-md);
  opacity:0;pointer-events:none;transition:.25s;z-index:900;font-size:18px;
}
.back-top.show{opacity:1;pointer-events:auto}

/* ---------- Responsive ---------- */
@media (max-width:1080px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:36px}
  .footer-top{grid-template-columns:1fr 1fr}
}
@media (max-width:960px){
  nav.main-nav{position:fixed;top:0;right:-100%;height:100vh;width:82%;max-width:340px;background:var(--white);
    flex-direction:column;align-items:stretch;padding:90px 0 30px;box-shadow:var(--shadow-lg);transition:.3s ease;overflow-y:auto}
  nav.main-nav.open{right:0}
  nav.main-nav > ul{flex-direction:column;align-items:stretch;width:100%}
  nav.main-nav a.nav-link{padding:16px 28px;border-bottom:1px solid var(--gray-100)}
  .dropdown{position:static;box-shadow:none;opacity:1;visibility:visible;transform:none;display:none;border-top:0;background:var(--off-white);padding:0}
  li.has-dropdown.open .dropdown{display:block}
  .nav-cta{margin:18px 28px 0}
  .nav-toggle{display:flex}
  .grid-3, .grid-2, .split, .contact-grid{grid-template-columns:1fr}
  .split{gap:40px}
  .split .frame::before{display:none}
  .topbar-left{display:none}
  .form-row{grid-template-columns:1fr}
  .footer-top{grid-template-columns:1fr;padding:56px 0 30px}
}
@media (max-width:640px){
  .grid-4{grid-template-columns:1fr 1fr}
  .stats-grid{grid-template-columns:1fr 1fr}
  .cta-band{flex-direction:column;text-align:center;padding:40px 28px}
  section{padding:60px 0}
}

/* ---------- Cartes projet cliquables ---------- */
a.project-card{display:block;cursor:pointer}
a.project-card:hover{box-shadow:var(--shadow-md);transform:translateY(-4px)}

/* ---------- Page projet ---------- */
.spec-row{display:flex;flex-wrap:wrap;gap:18px}
.spec{flex:1 1 170px;background:var(--off-white);border-left:3px solid var(--gold-500);padding:18px 22px;border-radius:3px}
.spec .v{font-family:var(--ff-head);font-size:26px;font-weight:700;color:var(--navy-900);line-height:1.2}
.spec .l{font-size:13px;color:var(--gray-700);margin-top:4px}
.gallery-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.gallery-item{display:block;overflow:hidden;border-radius:var(--radius);aspect-ratio:4/3;background:var(--gray-100)}
.gallery-item img{width:100%;height:100%;object-fit:cover;transition:.4s}
.gallery-item:hover img{transform:scale(1.06)}
.project-nav{display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap;margin-top:48px}

/* ---------- Lightbox ---------- */
.lb{position:fixed;inset:0;background:rgba(5,12,23,.94);z-index:3000;display:none;align-items:center;justify-content:center;padding:30px}
.lb.open{display:flex}
.lb img{max-width:92vw;max-height:86vh;object-fit:contain;border-radius:4px;box-shadow:var(--shadow-lg)}
.lb button{position:absolute;color:#fff;font-size:34px;line-height:1;padding:14px 18px;background:rgba(255,255,255,.08);border-radius:4px}
.lb button:hover{background:var(--gold-500);color:var(--navy-950)}
.lb .x{top:18px;right:18px}.lb .p{left:18px;top:50%;transform:translateY(-50%)}.lb .n{right:18px;top:50%;transform:translateY(-50%)}
.lb .c{position:absolute;bottom:18px;left:50%;transform:translateX(-50%);color:var(--gray-300);font-size:13px}
@media (max-width:960px){.gallery-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.gallery-grid{grid-template-columns:1fr}}