:root{
  --blue:#11166b;
  --bg:#ffffff;
  --text:#111;
  --muted:#2a2f3e;
  --soft:#f5f7ff;
  --gutter:clamp(20px,6vw,72px);
  --maxw:1100px;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0;height:100%}
body{
  font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.6;
}

/* Fix “petit espace blanc top” */
header,section,footer{display:block}
.header{margin:0;padding:0}

/* container */
.container{
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 var(--gutter);
}

/* ================= HEADER ================= */

.header{
  position:sticky;
  top:0;
  z-index:1000;
  background:var(--blue);
  box-shadow:0 4px 18px rgba(0,0,0,.2);
}

.nav{
  height:68px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  color:#fff;
}

.brand{
  font-weight:800;
  line-height:1.1;
  color:#fff;
  text-decoration:none;
}
.brand:hover{opacity:.95}

.nav ul{
  display:flex;
  gap:28px;
  list-style:none;
  margin:0;
  padding:0;
}

/* ===== NAV LINKS (underline premium) ===== */
.nav a{
  color:#fff;
  text-decoration:none;
  font-weight:600;
  font-size:15px;
  position:relative;
  padding:8px 0;
  opacity:.96;
  transition:opacity .18s ease, transform .18s ease;
}

/* underline */
.nav a::after{
  content:"";
  position:absolute;
  left:0; right:0;
  bottom:2px;
  height:2px;
  border-radius:2px;

  /* joli dégradé */
  background:linear-gradient(90deg, rgba(227,231,255,.95), rgba(255,255,255,1));
  opacity:.95;

  /* animé */
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .26s ease;
}

/* hover = underline + micro animation */
.nav a:hover{
  opacity:1;
  transform:translateY(-1px);
}
.nav a:hover::after{
  transform:scaleX(1);
}

/* active page link */
.nav a.active{
  opacity:1;
}
.nav a.active::after{
  transform:scaleX(1);
}

/* LANG SWITCH */
.lang-switch{
  display:flex;
  gap:6px;
  font-size:13px;
  color:#fff;
  align-items:center;
}
.lang-btn{
  background:none;
  border:none;
  color:#fff;
  font-weight:600;
  cursor:pointer;
  opacity:.85;
  padding:2px 6px;
  border-radius:6px;
  transition:background .18s ease, opacity .18s ease;
}
.lang-btn.active{opacity:1}
.lang-btn:hover{
  opacity:1;
  background:rgba(255,255,255,.12);
}

/* ================= HERO ================= */

.hero{
  position:relative;
  height:85vh;
  min-height:560px;
  background:url("../images/fond.jpg") center/cover no-repeat;
  overflow:hidden;
}

.hero__overlay{
  position:absolute;
  inset:0;
  background:rgba(0,0,0,.55);
}

.hero__content{
  position:relative;
  height:100%;
  display:flex;
  align-items:center;
}

.hero__copy{
  width:min(100%, 980px);
  margin:0 auto;
  text-align:center;
  color:#fff;
}

.hero__title{
  font-size:clamp(36px,6vw,64px);
  font-weight:900;
  letter-spacing:.08em;
  margin:0 0 12px;
  text-shadow:0 18px 40px rgba(0,0,0,.6);
  white-space:nowrap;
}

@media (max-width:560px){
  .hero__title{white-space:normal;}
}

.hero__kicker{
  margin:0 0 12px;
  letter-spacing:.18em;
  text-transform:uppercase;
  opacity:.9;
}

.hero__lead{
  font-size:18px;
  margin:0 auto 26px;
  max-width:60ch;
  opacity:.95;
}

.hero__cta{
  display:flex;
  gap:16px;
  justify-content:center;
  flex-wrap:wrap;
}

/* ================= BUTTONS ================= */

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:14px 26px;
  border-radius:999px;
  font-weight:700;
  text-decoration:none;
  transition:.25s;
}

.btn--primary{
  background:#fff;
  color:var(--blue);
  box-shadow:0 12px 26px rgba(0,0,0,.35);
}
.btn--primary:hover{transform:translateY(-2px)}

.btn--ghost{
  border:1.5px solid rgba(255,255,255,.75);
  color:#fff;
  background:rgba(255,255,255,.10);
}
.btn--ghost:hover{background:rgba(255,255,255,.20)}

/* variantes dark (bandeau) */
.btn--primary-dark{
  background:#fff;
  color:var(--blue);
  box-shadow:0 12px 26px rgba(0,0,0,.25);
}
.btn--ghost-dark{
  border:1.5px solid rgba(255,255,255,.55);
  background:rgba(255,255,255,.12);
  color:#fff;
}

.hero__scroll{
  position:absolute;
  bottom:18px;
  left:50%;
  transform:translateX(-50%);
  background:rgba(255,255,255,.12);
  border:1px solid rgba(255,255,255,.6);
  color:#fff;
  padding:10px 18px;
  border-radius:999px;
  cursor:pointer;
  font-size:12px;
  letter-spacing:.2em;
  text-transform:uppercase;
}
.hero__scroll:hover{background:rgba(255,255,255,.22)}

/* ================= SECTIONS ================= */

.section{padding:64px 0}

.section-head{
  text-align:center;
  margin-bottom:32px;
}

.section-title{
  font-weight:900;
  letter-spacing:.28em;
  color:var(--blue);
  margin:0;
}

.section-underline{
  width:80px;
  height:3px;
  background:var(--blue);
  border-radius:3px;
  display:inline-block;
  margin-top:10px;
}

/* ================= ABOUT ================= */

.about{
  display:grid;
  grid-template-columns: minmax(260px, 380px) 1fr;
  gap:44px;
  align-items:start;
  margin-top:26px;
}

.about__photo img{
  width:100%;
  height:auto;
  border-radius:18px;
  box-shadow:0 16px 34px rgba(0,0,0,.12);
  display:block;
}

.about__headline{
  margin:0 0 14px;
  font-size:20px;
  line-height:1.45;
}

.about__lead{
  margin:0 0 18px;
  color:var(--muted);
  font-size:16px;
}

.about h3{
  margin:18px 0 10px;
  color:var(--blue);
  font-weight:900;
  letter-spacing:.10em;
  text-transform:uppercase;
  font-size:13px;
}

.about ul{
  margin:0;
  padding-left:18px;
  color:#222;
}
.about li{margin:8px 0}

.chips{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:8px;
}
.chips span{
  display:inline-flex;
  align-items:center;
  padding:8px 12px;
  border-radius:999px;
  background:#f2f3ff;
  border:1px solid rgba(17,22,107,.18);
  color:var(--blue);
  font-weight:700;
  font-size:13px;
}

.about__closing{
  margin:26px auto 0;
  max-width:70ch;
  text-align:center;
  color:var(--muted);
  font-weight:600;
}

/* ================= CTA BAND ================= */

.cta-band{
  background:linear-gradient(180deg, #11166b 0%, #0d1258 100%);
  color:#fff;
  padding:42px 0;
}

.cta-band__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:22px;
}

.cta-band__text h3{
  margin:0 0 6px;
  font-size:22px;
  letter-spacing:.02em;
}
.cta-band__text p{margin:0;opacity:.9}

.cta-band__actions{
  display:flex;
  gap:14px;
  flex-wrap:wrap;
  justify-content:flex-end;
}

/* ================= FOOTER ================= */

.footer{
  background:#0b0f4f;
  color:#e9ecff;
}

.footer__grid{
  padding:44px 0;
  display:grid;
  grid-template-columns:1.2fr 1fr 1fr;
  gap:34px;
}

.footer__brand{
  font-weight:900;
  font-size:18px;
  margin-bottom:10px;
  color:#fff;
}

.footer__muted{
  margin:6px 0 0;
  opacity:.85;
  color:#d7dcff;
}

.footer__title{
  font-weight:800;
  color:#fff;
  margin-bottom:12px;
  letter-spacing:.08em;
  text-transform:uppercase;
  font-size:12px;
}

.footer__links{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  gap:10px;
}

.footer__links a{
  color:#d7dcff;
  text-decoration:none;
  opacity:.92;
}
.footer__links a:hover{
  opacity:1;
  text-decoration:underline;
}

.footer__contact{
  display:flex;
  align-items:center;
  gap:10px;
  color:#d7dcff;
  text-decoration:none;
  margin-bottom:12px;
}
.footer__contact:hover{color:#fff}

.ico{
  width:18px;
  height:18px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  color:#fff;
  opacity:.9;
}
.ico svg{width:18px;height:18px;color:currentColor}

.footer__bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:14px 0;
}

.footer__bottom-inner{
  text-align:center;
  font-size:13px;
  color:#d7dcff;
  opacity:.9;
}

/* ================= RESPONSIVE ================= */

@media(max-width:980px){
  .about{
    grid-template-columns:1fr;
    gap:22px;
  }
  .about__photo{
    max-width:420px;
    margin:0 auto;
  }
  .cta-band__inner{
    flex-direction:column;
    text-align:center;
  }
  .cta-band__actions{
    justify-content:center;
  }
  .footer__grid{
    grid-template-columns:1fr;
  }
}

@media(max-width:768px){
  .hero{height:75vh;}
  .hero__lead{font-size:16px;}
  .hero__cta{flex-direction:column;align-items:center;}
}