:root{
  --navy:#071a57;
  --blue:#0b4ca3;
  --sky:#168ac5;
  --yellow:#ffd500;
  --red:#e30613;
  --green:#00883e;
  --light:#f4f7fb;
  --text:#172033;
  --muted:#667085;
  --white:#fff;
  --shadow:0 16px 40px rgba(7,26,87,.13);
  --radius:22px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,Arial,Helvetica,sans-serif;color:var(--text);background:#fff;line-height:1.6}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
.container{width:min(1160px,92%);margin:auto}
.topbar{background:var(--navy);color:#fff;font-size:.9rem}
.topbar .container{display:flex;justify-content:space-between;gap:20px;padding:9px 0;flex-wrap:wrap}
.header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:blur(12px);box-shadow:0 4px 18px rgba(7,26,87,.08)}
.nav{display:flex;align-items:center;justify-content:space-between;min-height:78px}
.brand{display:flex;align-items:center;gap:12px}
.brand img{width:104px;height:64px;object-fit:contain}
.brand strong{color:var(--navy);font-size:1.15rem}
.nav-links{display:flex;gap:24px;align-items:center}
.nav-links a{font-weight:700;color:#21304f}
.nav-links a:hover,.nav-links a.active{color:var(--blue)}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:13px 20px;border-radius:12px;font-weight:800;border:0;cursor:pointer;transition:.2s}
.btn-primary{background:var(--blue);color:#fff;box-shadow:0 10px 24px rgba(11,76,163,.25)}
.btn-primary:hover{transform:translateY(-2px);background:var(--navy)}
.btn-light{background:#fff;color:var(--navy)}
.menu-btn{display:none;border:0;background:none;font-size:1.8rem;color:var(--navy)}
.hero{position:relative;min-height:680px;display:flex;align-items:center;color:#fff;overflow:hidden;background:linear-gradient(90deg,rgba(7,26,87,.95),rgba(7,26,87,.62)),url('../img/chantier-direction.jpg') center/cover}
.hero:after{content:"";position:absolute;inset:auto -160px -230px auto;width:620px;height:620px;background:linear-gradient(135deg,var(--yellow),var(--red),var(--green));opacity:.12;border-radius:50%}
.hero .content{position:relative;z-index:2;max-width:760px;padding:90px 0}
.eyebrow{display:inline-block;text-transform:uppercase;letter-spacing:.13em;font-weight:900;color:var(--yellow);font-size:.84rem;margin-bottom:10px}
h1{font-size:clamp(2.6rem,6vw,5.6rem);line-height:1.02;margin:0 0 22px}
.hero p{font-size:1.2rem;max-width:720px;color:#e6ecff}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:32px}
.stats{margin-top:-60px;position:relative;z-index:3}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.stat{padding:28px;text-align:center;border-right:1px solid #e7ebf4}
.stat:last-child{border-right:0}
.stat strong{display:block;font-size:2rem;color:var(--blue)}
.section{padding:90px 0}
.section.light{background:var(--light)}
.section-title{max-width:760px;margin-bottom:42px}
.section-title h2{font-size:clamp(2rem,4vw,3.2rem);line-height:1.15;margin:8px 0 12px;color:var(--navy)}
.section-title p{color:var(--muted);font-size:1.08rem}
.grid-2{display:grid;grid-template-columns:1.05fr .95fr;gap:54px;align-items:center}
.image-card{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.image-card img{width:100%;height:520px;object-fit:cover}
.checks{display:grid;gap:12px;margin:24px 0}
.check{display:flex;gap:12px;align-items:flex-start}
.check span{background:var(--green);color:white;border-radius:50%;width:25px;height:25px;display:grid;place-items:center;flex:0 0 25px;font-weight:900}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{background:#fff;border-radius:18px;padding:28px;box-shadow:0 10px 30px rgba(7,26,87,.08);border:1px solid #e9edf6;transition:.25s}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.icon{width:54px;height:54px;border-radius:14px;display:grid;place-items:center;background:#eaf2ff;color:var(--blue);font-size:1.5rem;font-weight:900;margin-bottom:18px}
.card h3{margin:0 0 10px;color:var(--navy)}
.card p{color:var(--muted)}
.project-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.project{position:relative;border-radius:18px;overflow:hidden;min-height:320px;color:#fff}
.project img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}
.project:after{content:"";position:absolute;inset:0;background:linear-gradient(0deg,rgba(7,26,87,.92),rgba(7,26,87,.05))}
.project-content{position:absolute;z-index:2;left:22px;right:22px;bottom:20px}
.project-content h3{margin:0 0 6px}
.band{background:linear-gradient(120deg,var(--navy),var(--blue));color:#fff;padding:56px 0}
.band .container{display:flex;align-items:center;justify-content:space-between;gap:30px}
.page-hero{padding:110px 0 70px;background:linear-gradient(120deg,var(--navy),var(--blue));color:#fff}
.page-hero h1{font-size:clamp(2.5rem,5vw,4.5rem)}
.timeline{display:grid;gap:18px}
.timeline-item{display:grid;grid-template-columns:120px 1fr;gap:22px;padding:22px;background:#fff;border-radius:16px;box-shadow:0 8px 24px rgba(7,26,87,.08)}
.timeline-item strong{color:var(--blue)}
.contact-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:30px}
.contact-card,.form-card{background:#fff;border-radius:20px;padding:30px;box-shadow:var(--shadow)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-grid .full{grid-column:1/-1}
input,textarea,select{width:100%;padding:14px 15px;border:1px solid #dbe2ee;border-radius:11px;font:inherit}
textarea{min-height:150px;resize:vertical}
.footer{background:#06133d;color:#dce5ff;padding:58px 0 24px}
.footer-grid{display:grid;grid-template-columns:1.2fr .8fr .8fr 1fr;gap:34px}
.footer h4{color:#fff;margin-top:0}
.footer a{display:block;margin:8px 0;color:#dce5ff}
.copyright{border-top:1px solid rgba(255,255,255,.13);margin-top:35px;padding-top:20px;color:#aebce4;font-size:.9rem}
.badges{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}
.badge{padding:8px 12px;border-radius:999px;background:#eef4ff;color:var(--blue);font-weight:800;font-size:.85rem}
@media(max-width:900px){
  .menu-btn{display:block}.nav-links{position:absolute;top:78px;left:0;right:0;background:#fff;display:none;flex-direction:column;padding:24px;box-shadow:0 14px 30px rgba(7,26,87,.12)}.nav-links.open{display:flex}.nav-links .btn{width:100%}
  .grid-2,.contact-grid{grid-template-columns:1fr}.cards,.project-grid{grid-template-columns:repeat(2,1fr)}.stats-grid{grid-template-columns:repeat(2,1fr)}.stat:nth-child(2){border-right:0}.footer-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:620px){.hero{min-height:620px}.hero .content{padding:70px 0}.stats{margin-top:-35px}.stats-grid,.cards,.project-grid,.footer-grid,.form-grid{grid-template-columns:1fr}.stat{border-right:0;border-bottom:1px solid #e7ebf4}.band .container{flex-direction:column;align-items:flex-start}.timeline-item{grid-template-columns:1fr}.topbar .container{justify-content:center;text-align:center}.image-card img{height:360px}}

/* Navigation améliorée */
.nav-links{gap:8px}
.nav-links>a:not(.btn){position:relative;padding:11px 13px;border-radius:10px;transition:background .2s,color .2s,transform .2s}
.nav-links>a:not(.btn):hover{background:#eef4ff;color:var(--blue);transform:translateY(-1px)}
.nav-links>a:not(.btn).active{background:#e7f0ff;color:var(--blue)}
.nav-links>a:not(.btn).active:after{content:"";position:absolute;left:13px;right:13px;bottom:5px;height:2px;border-radius:99px;background:var(--yellow)}
.nav-links a.btn-primary{color:#fff;background:var(--blue);padding:12px 18px;border:2px solid var(--blue);box-shadow:0 8px 20px rgba(11,76,163,.25)}
.nav-links a.btn-primary:hover{color:#fff;background:var(--navy);border-color:var(--navy);transform:translateY(-2px)}

/* Slider de la section hero : image et texte séparés */
.hero-slider{background:var(--navy)}
.hero-media{position:relative;height:clamp(390px,58vw,670px);overflow:hidden;background:#081b54}
.hero-slides,.hero-slide{position:absolute;inset:0}
.hero-slide{background-position:center;background-size:cover;opacity:0;transform:scale(1.04);transition:opacity .9s ease,transform 6s ease}
.hero-slide.active{opacity:1;transform:scale(1)}
.hero-caption{background:linear-gradient(120deg,#071a57,#0b4ca3);color:#fff;padding:46px 0 52px}
.hero-inner{position:relative}
.hero-slider .content{max-width:880px;padding:0}
.hero-slider h1{font-size:clamp(2.35rem,5vw,4.9rem);line-height:1.04;margin:.25em 0}
.hero-slider p{font-size:1.18rem;max-width:820px;color:#edf2ff;margin-bottom:26px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.btn-accent{background:var(--yellow);color:#071a57;box-shadow:0 10px 24px rgba(0,0,0,.18)}
.btn-accent:hover{background:#fff;transform:translateY(-2px)}
.btn-outline-light{background:transparent;color:#fff;border:2px solid rgba(255,255,255,.85)}
.btn-outline-light:hover{background:#fff;color:var(--navy);transform:translateY(-2px)}
.slider-arrow{position:absolute;z-index:4;top:50%;transform:translateY(-50%);width:48px;height:48px;border:1px solid rgba(255,255,255,.65);border-radius:50%;background:rgba(7,26,87,.55);color:#fff;font-size:2rem;line-height:1;cursor:pointer;backdrop-filter:blur(6px);transition:.2s}
.slider-arrow:hover{background:var(--blue);border-color:#fff}
.slider-prev{left:24px}.slider-next{right:24px}
.slider-dots{position:absolute;z-index:4;left:50%;bottom:24px;transform:translateX(-50%);display:flex;gap:9px}
.slider-dots button{width:10px;height:10px;padding:0;border:0;border-radius:50%;background:rgba(255,255,255,.62);cursor:pointer;transition:.25s}
.slider-dots button.active{width:30px;border-radius:99px;background:var(--yellow)}

@media(max-width:900px){
  .slider-prev{left:10px}.slider-next{right:10px}.slider-arrow{width:42px;height:42px}
  .hero-caption{padding:38px 0 44px}
}
@media(max-width:620px){
  .hero-media{height:390px}
  .slider-arrow{display:none}
  .hero-caption{padding:32px 0 38px}
  .hero-slider p{font-size:1rem}
  .hero-actions{display:grid;grid-template-columns:1fr}
  .hero-actions .btn{width:100%}
}

/* Pied de page uniformisé */
.footer-brand img{width:150px;background:#fff;border-radius:12px;padding:8px;margin-bottom:16px}
.footer p{color:#c9d5f7}
.footer a{transition:color .2s,transform .2s}
.footer a:hover{color:#fff;transform:translateX(3px)}
.copyright{display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap}
.copyright a{margin:0;color:#fff;font-weight:800}

@media(max-width:900px){
  .nav-links{gap:8px;align-items:stretch}.nav-links>a:not(.btn){width:100%;text-align:center}.nav-links>a:not(.btn).active:after{display:none}
  .slider-prev{left:10px}.slider-next{right:10px}.slider-arrow{width:42px;height:42px}
}
@media(max-width:620px){
  .hero-slider{min-height:650px}.hero-slider .content{padding:75px 0 100px}.slider-arrow{display:none}.hero-overlay{background:linear-gradient(90deg,rgba(5,18,61,.94),rgba(7,26,87,.72))}
}

/* Newsletter et page News */
.footer-grid{grid-template-columns:1.15fr .65fr .85fr 1fr 1.2fr}
.newsletter-form{display:grid;gap:10px;margin-top:14px}
.newsletter-form input{width:100%;border:1px solid rgba(255,255,255,.3);border-radius:9px;padding:13px 14px;background:#fff;color:#14213d;font:inherit;outline:none}
.newsletter-form input:focus{border-color:var(--yellow);box-shadow:0 0 0 3px rgba(255,214,10,.18)}
.newsletter-form button{border:0;border-radius:9px;padding:13px 16px;background:var(--yellow);color:#071a57;font-weight:900;cursor:pointer;transition:transform .2s,filter .2s}
.newsletter-form button:hover{transform:translateY(-2px);filter:brightness(1.05)}
.newsletter-message{min-height:18px;color:#fff;font-weight:700}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.news-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:28px}
.news-card{background:#fff;border-radius:18px;overflow:hidden;box-shadow:0 14px 36px rgba(7,26,87,.1);border:1px solid #edf1f8}
.news-card img{width:100%;height:290px;object-fit:cover}
.news-content{padding:24px}
.news-date{display:inline-block;color:var(--blue);font-size:.78rem;font-weight:900;letter-spacing:.08em;margin-bottom:10px}
.news-content h3{margin:0 0 12px;color:var(--navy)}
.news-content a{display:inline-block;margin-top:10px;color:var(--blue);font-weight:900}
@media(max-width:1100px){.footer-grid{grid-template-columns:repeat(3,1fr)}.newsletter{grid-column:span 2}}
@media(max-width:760px){.news-grid{grid-template-columns:1fr}.news-card img{height:240px}.footer-grid{grid-template-columns:1fr}.newsletter{grid-column:auto}}

/* Contenus synchronisés du Hero */
.hero-content{display:none;animation:heroContentIn .45s ease both}
.hero-content.active{display:block}
.hero-content[data-slide="0"] h1{font-size:clamp(2rem,4.2vw,4.2rem)}
@keyframes heroContentIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}


/* Ajustements finaux de la maquette */
@media(min-width:901px){
  .nav-links{gap:4px;flex-wrap:nowrap;white-space:nowrap}
  .nav-links>a:not(.btn){font-size:.78rem;padding:10px 8px;letter-spacing:.01em}
  .nav-links a.btn-primary{font-size:.76rem;padding:11px 12px;white-space:nowrap}
  .brand{flex:0 0 auto}.brand strong{font-size:1rem}.brand img{width:92px}
}
.hero-slider + .stats{margin-top:0;padding-top:26px;background:#fff}
.hero-caption{padding-bottom:68px}
.footer-brand img{width:170px;height:auto;background:transparent;border-radius:0;padding:0;object-fit:contain;margin-bottom:18px}
.news-content .btn-news{display:inline-flex;margin-top:14px;background:var(--blue);color:#fff;padding:10px 15px;border-radius:10px;font-size:.82rem;transition:.2s}
.news-content .btn-news:hover{background:var(--navy);color:#fff;transform:translateY(-2px)}
.news-detail-hero{padding-bottom:58px}
.news-detail-hero p{max-width:850px;font-size:1.12rem;color:#e6ecff}
.news-detail-grid{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:42px;align-items:start}
.news-detail-image{width:100%;height:clamp(340px,50vw,620px);object-fit:cover;border-radius:22px;box-shadow:var(--shadow);margin-bottom:30px}
.news-detail-body{font-size:1.08rem;color:#3c475e}
.news-detail-body p{margin:0 0 20px}
.news-detail-aside{position:sticky;top:110px;background:var(--light);border-radius:18px;padding:26px}
.news-detail-aside h3{color:var(--navy);margin-top:0}
.news-detail-aside .btn{width:100%;margin-top:10px}
@media(max-width:900px){.news-detail-grid{grid-template-columns:1fr}.news-detail-aside{position:static}.hero-slider + .stats{padding-top:20px}}
@media(max-width:620px){.hero-caption{padding-bottom:48px}.hero-slider + .stats{margin-top:0;padding-top:16px}.news-detail-image{height:280px}}