:root{
  --bg:#f7f8fb;
  --bg-dark:#0a1929;
  --bg-dark-2:#0f2338;
  --ink:#0a1929;
  --ink-2:#1a2f47;
  --muted:#5a6a85;
  --muted-2:#8290a8;
  --line:#e4e8f0;
  --line-dark:rgba(255,255,255,.10);
  --blue:#1e40af;
  --blue-2:#3b82f6;
  --blue-bright:#60a5fa;
  --gold:#c5a15a;
  --accent-grad:linear-gradient(135deg,#1e40af 0%,#3b82f6 100%);
  --radius:18px;
  --radius-sm:12px;
  --wrap:min(1280px, calc(100% - 48px));
  --font-serif:'Playfair Display',Georgia,serif;
  --font-sans:'Inter',system-ui,-apple-system,Segoe UI,sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font-sans);
  color:var(--ink);
  background:var(--bg);
  line-height:1.7;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

/* Typography */
h1,h2,h3,h4{font-family:var(--font-serif);color:var(--ink);font-weight:500;line-height:1.15;letter-spacing:-.015em}
h1{font-size:clamp(2.6rem,6vw,5.2rem);letter-spacing:-.03em;font-weight:400}
h2{font-size:clamp(2rem,3.5vw,3.4rem);font-weight:500}
h3{font-size:clamp(1.25rem,1.8vw,1.6rem);font-weight:500}
p{color:var(--muted);line-height:1.8}
.lead{font-size:clamp(1.08rem,1.3vw,1.22rem);color:var(--ink-2);line-height:1.7}
a{color:inherit;text-decoration:none;transition:color .2s}
img{display:block;max-width:100%;height:auto}

/* Layout */
.wrap{width:var(--wrap);margin:0 auto}
section{padding:clamp(70px,9vw,140px) 0;position:relative}
.eyebrow{display:inline-flex;align-items:center;gap:14px;font-size:.78rem;color:var(--blue-2);font-weight:600;letter-spacing:.22em;text-transform:uppercase;margin-bottom:24px}
.eyebrow::before,.eyebrow::after{content:"";width:32px;height:1px;background:var(--blue-2);display:inline-block}
.eyebrow:not(.one-side)::after{display:inline-block}
.eyebrow.center{justify-content:center}
.eyebrow.on-dark{color:var(--blue-bright)}
.eyebrow.on-dark::before,.eyebrow.on-dark::after{background:var(--blue-bright)}

/* Nav */
.nav{position:fixed;top:0;left:0;right:0;z-index:50;background:rgba(10,25,41,.75);backdrop-filter:blur(22px);border-bottom:1px solid rgba(255,255,255,.06);transition:all .3s}
.nav.scrolled{background:rgba(10,25,41,.95)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;padding:18px 0}
.brand{display:flex;align-items:center;color:#fff}
.brand img{height:48px;width:auto;filter:drop-shadow(0 2px 8px rgba(0,0,0,.3))}
.brand-text{font-family:var(--font-serif);font-size:1.5rem;font-weight:500;letter-spacing:.03em}
.brand-text .sub{display:block;font-family:var(--font-sans);font-size:.65rem;letter-spacing:.3em;color:var(--blue-bright);text-transform:uppercase;margin-top:-2px}

/* Sound toggle button pour videos */
.sound-toggle{position:fixed;bottom:28px;right:28px;z-index:60;background:linear-gradient(135deg,var(--blue),var(--blue-2));color:#fff;border:none;padding:14px 22px;border-radius:999px;font-family:inherit;font-weight:600;font-size:.92rem;cursor:pointer;box-shadow:0 12px 32px rgba(30,64,175,.45);transition:all .3s;display:inline-flex;align-items:center;gap:10px}
.sound-toggle:hover{transform:translateY(-3px);box-shadow:0 16px 40px rgba(30,64,175,.6)}
.sound-toggle.active{background:linear-gradient(135deg,#1e3a8a,#2563eb)}
.sound-toggle svg{width:18px;height:18px}
.sound-toggle.muted .icon-on{display:none}
.sound-toggle:not(.muted) .icon-off{display:none}
.menu{display:flex;align-items:center;gap:36px;font-size:.9rem;font-weight:500;letter-spacing:.03em}
.menu a{color:rgba(255,255,255,.78);position:relative;padding:6px 0}
.menu a:hover,.menu a.active{color:#fff}
.menu a.active::after{content:"";position:absolute;left:0;right:0;bottom:-4px;height:1px;background:var(--blue-bright)}
.nav-cta{background:var(--accent-grad);color:#fff!important;padding:12px 26px;border-radius:8px;font-weight:600;transition:transform .2s,box-shadow .2s}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(59,130,246,.3)}
.burger{display:none;background:none;border:1px solid rgba(255,255,255,.18);padding:10px;border-radius:8px;cursor:pointer}
.burger span{display:block;width:22px;height:2px;background:#fff;margin:5px 0;transition:.3s}
.burger.open span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.burger.open span:nth-child(2){opacity:0}
.burger.open span:nth-child(3){transform:rotate(-45deg) translate(7px,-6px)}

/* Hero - full screen dark */
.hero{min-height:100vh;padding:140px 0 80px;background:linear-gradient(180deg,var(--bg-dark) 0%,var(--bg-dark-2) 100%);color:#fff;position:relative;overflow:hidden;display:flex;align-items:center}
.hero::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(ellipse at 80% 20%, rgba(59,130,246,.18), transparent 50%),
    radial-gradient(ellipse at 20% 80%, rgba(30,64,175,.12), transparent 60%);
  pointer-events:none
}
.hero::after{
  content:"";position:absolute;inset:0;
  background-image:
    radial-gradient(1px 1px at 20% 30%, rgba(255,255,255,.6), transparent),
    radial-gradient(1.2px 1.2px at 70% 25%, rgba(96,165,250,.5), transparent),
    radial-gradient(.9px .9px at 45% 70%, rgba(255,255,255,.4), transparent),
    radial-gradient(1.1px 1.1px at 85% 65%, rgba(255,255,255,.5), transparent),
    radial-gradient(1px 1px at 15% 85%, rgba(96,165,250,.6), transparent);
  opacity:.6;
  animation:twinkle 4s ease-in-out infinite alternate
}
@keyframes twinkle{to{opacity:.3}}
.hero-content{position:relative;z-index:1;text-align:center;max-width:1000px;margin:0 auto}
.hero h1{color:#fff;margin-bottom:28px}
.hero h1 .accent{font-style:italic;background:linear-gradient(135deg,var(--blue-bright) 0%,#fff 100%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero-tagline{color:rgba(255,255,255,.85);font-size:clamp(1rem,1.2vw,1.15rem);letter-spacing:.3em;text-transform:uppercase;margin-bottom:36px;font-weight:300}
.hero-lead{max-width:700px;margin:0 auto 44px;color:rgba(255,255,255,.78);font-size:clamp(1.05rem,1.2vw,1.18rem)}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;justify-content:center}

/* Badges palmarès */
.badges{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;max-width:800px;margin:60px auto 0;padding-top:40px;border-top:1px solid rgba(255,255,255,.12)}
.badge{text-align:center;padding:0 10px}
.badge-icon{width:48px;height:48px;margin:0 auto 14px;color:var(--blue-bright);display:flex;align-items:center;justify-content:center}
.badge-icon svg{width:100%;height:100%}
.badge-title{font-family:var(--font-serif);font-size:1.05rem;color:#fff;margin-bottom:4px;letter-spacing:.01em}
.badge-sub{font-size:.82rem;color:rgba(255,255,255,.55);letter-spacing:.05em}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:15px 32px;border-radius:8px;font-weight:600;font-size:.92rem;letter-spacing:.04em;transition:all .25s;cursor:pointer;border:none;font-family:inherit}
.btn-primary{background:var(--accent-grad);color:#fff}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 32px rgba(59,130,246,.35)}
.btn-outline-light{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.25)}
.btn-outline-light:hover{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.5)}
.btn-outline{background:transparent;color:var(--blue);border:1px solid var(--line)}
.btn-outline:hover{border-color:var(--blue-2);color:var(--blue-2);transform:translateY(-1px)}
.btn-arrow::after{content:"→";margin-left:8px;transition:transform .2s}
.btn-arrow:hover::after{transform:translateX(4px)}

/* Section title centered */
.section-title{text-align:center;max-width:820px;margin:0 auto 70px}
.section-title h2{margin-bottom:20px}
.section-title p{font-size:1.05rem;color:var(--muted)}

/* Prestations cards */
.prestations-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:28px}
.prestation-card{background:#fff;border-radius:var(--radius);padding:44px 34px;border:1px solid var(--line);transition:all .35s;position:relative;overflow:hidden}
.prestation-card::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--accent-grad);transform:scaleX(0);transform-origin:left;transition:transform .4s}
.prestation-card:hover{transform:translateY(-6px);box-shadow:0 28px 60px rgba(10,25,41,.08);border-color:transparent}
.prestation-card:hover::before{transform:scaleX(1)}
.prestation-icon{width:56px;height:56px;border-radius:14px;background:linear-gradient(135deg,#eff6ff 0%,#dbeafe 100%);display:flex;align-items:center;justify-content:center;margin-bottom:24px;color:var(--blue)}
.prestation-icon svg{width:28px;height:28px}
.prestation-card h3{margin-bottom:14px;color:var(--ink)}
.prestation-card p{font-size:.95rem;margin-bottom:18px}
.prestation-card .link{color:var(--blue-2);font-weight:600;font-size:.88rem;letter-spacing:.02em}

/* Section dark */
.section-dark{background:linear-gradient(180deg,var(--bg-dark) 0%,var(--bg-dark-2) 100%);color:#fff}
.section-dark h2,.section-dark h3{color:#fff}
.section-dark p{color:rgba(255,255,255,.72)}

/* Split section - portrait + texte */
.split{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center}
.split-visual{position:relative;aspect-ratio:3/4;border-radius:var(--radius);overflow:hidden;box-shadow:0 30px 80px rgba(10,25,41,.4)}
.split-visual img{width:100%;height:100%;object-fit:cover}
.split-visual::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 60%,rgba(10,25,41,.4));pointer-events:none}
.quote{font-family:var(--font-serif);font-size:clamp(1.4rem,2vw,1.9rem);line-height:1.4;font-style:italic;color:#fff;margin-bottom:30px;position:relative;padding-left:28px}
.quote::before{content:"\201C";position:absolute;left:-12px;top:-30px;font-size:6rem;color:var(--blue-bright);font-family:var(--font-serif);line-height:1;opacity:.3}

/* Video gallery - pleine largeur, autoplay (padding-bottom technique = fiable partout) */
.video-grid{display:block;max-width:1400px;margin:0 auto}
.video-grid > * + *{margin-top:40px}
.video-card{width:100%;height:0!important;padding-bottom:56.25%;border-radius:var(--radius);overflow:hidden;position:relative;background:#000;box-shadow:0 30px 80px rgba(10,25,41,.25)}
.video-card iframe{position:absolute!important;top:0!important;left:0!important;width:100%!important;height:100%!important;border:0;display:block}
.video-card .video-overlay-hint{position:absolute;top:20px;right:20px;background:rgba(0,0,0,.65);color:#fff;padding:8px 14px;border-radius:8px;font-size:.78rem;letter-spacing:.05em;z-index:2;backdrop-filter:blur(8px);pointer-events:none;opacity:0;transition:opacity .3s}
.video-card:hover .video-overlay-hint{opacity:1}

@media (max-width:720px){
  .video-grid{gap:24px}
}

/* Logos clients */
.logos-strip{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:30px;padding:50px;background:#fff;border-radius:var(--radius);align-items:center;border:1px solid var(--line)}
.logo-slot{display:flex;align-items:center;justify-content:center;padding:14px;color:var(--muted);font-family:var(--font-serif);font-size:1.05rem;font-style:italic;font-weight:500;opacity:.65;transition:opacity .3s}
.logo-slot:hover{opacity:1}

/* CTA final */
.cta-final{background:linear-gradient(135deg,var(--bg-dark) 0%,var(--blue) 100%);color:#fff;text-align:center;padding:100px 0;position:relative;overflow:hidden}
.cta-final::before{content:"";position:absolute;inset:0;background:radial-gradient(ellipse at center, rgba(96,165,250,.15), transparent 60%)}
.cta-final > .wrap{position:relative;z-index:1}
.cta-final h2{color:#fff;margin-bottom:20px}
.cta-final p{color:rgba(255,255,255,.85);max-width:560px;margin:0 auto 36px;font-size:1.08rem}

/* Footer */
footer{background:#070d18;color:rgba(255,255,255,.7);padding:70px 0 30px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:48px;margin-bottom:50px}
.footer-brand .brand-text{color:#fff;margin-bottom:18px;display:block}
.footer-brand p{font-size:.92rem;max-width:340px;color:rgba(255,255,255,.6)}
.footer h4{color:#fff;font-family:var(--font-sans);font-size:.88rem;font-weight:600;letter-spacing:.12em;text-transform:uppercase;margin-bottom:22px}
.footer ul{list-style:none}
.footer li{margin-bottom:12px;font-size:.93rem}
.footer li a{color:rgba(255,255,255,.6);transition:color .2s}
.footer li a:hover{color:var(--blue-bright)}
.footer-bottom{padding-top:28px;border-top:1px solid rgba(255,255,255,.08);display:flex;justify-content:space-between;flex-wrap:wrap;gap:14px;font-size:.82rem;color:rgba(255,255,255,.4)}
.socials{display:flex;gap:12px;margin-top:18px}
.socials a{width:40px;height:40px;min-width:40px;flex-shrink:0;border-radius:50%;background:rgba(255,255,255,.06);display:flex;align-items:center;justify-content:center;transition:all .2s;color:#fff}
.socials a:hover{background:var(--blue-2);transform:translateY(-2px)}
.socials svg{width:18px!important;height:18px!important;flex-shrink:0}

.logo-slot{color:var(--ink-2);opacity:.85;font-weight:600}
.logo-slot:hover{opacity:1;color:var(--blue)}

/* Mobile menu */
.mobile-menu{position:fixed;inset:0;background:rgba(10,25,41,.98);backdrop-filter:blur(20px);z-index:100;opacity:0;visibility:hidden;transition:all .3s}
.mobile-menu.open{opacity:1;visibility:visible}
.mobile-menu-inner{padding:100px 40px;height:100%;overflow-y:auto}
.mobile-menu a{display:block;padding:22px 0;border-bottom:1px solid rgba(255,255,255,.08);color:#fff;font-family:var(--font-serif);font-size:1.4rem;letter-spacing:.02em}
.mobile-menu a:hover{color:var(--blue-bright)}
.mobile-menu .nav-cta{display:inline-block;margin-top:30px;font-family:var(--font-sans);font-size:.92rem}

/* Form */
.form-card{background:#fff;padding:50px;border-radius:var(--radius);border:1px solid var(--line);max-width:720px;margin:0 auto;box-shadow:0 20px 50px rgba(10,25,41,.06)}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-bottom:20px}
.form-group{margin-bottom:22px}
.form-group label{display:block;font-size:.82rem;color:var(--ink-2);margin-bottom:8px;font-weight:600;letter-spacing:.03em}
.form-group input,.form-group textarea,.form-group select{width:100%;background:#fafbfd;border:1px solid var(--line);padding:14px 16px;border-radius:10px;color:var(--ink);font-family:inherit;font-size:.95rem;transition:all .2s}
.form-group input:focus,.form-group textarea:focus,.form-group select:focus{outline:none;border-color:var(--blue-2);background:#fff;box-shadow:0 0 0 4px rgba(59,130,246,.08)}
.form-group textarea{min-height:140px;resize:vertical}

/* Responsive */
@media (max-width:960px){
  .split{grid-template-columns:1fr;gap:50px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:40px}
}
@media (max-width:720px){
  :root{--wrap:calc(100% - 32px)}
  .menu{display:none}
  .burger{display:block}
  .nav-cta{display:none}
  .badges{grid-template-columns:1fr;gap:28px}
  .form-row{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .hero-actions{flex-direction:column;width:100%;max-width:340px;margin:0 auto}
  .btn{width:100%}
}

/* Utilities */
.text-center{text-align:center}
.mt-40{margin-top:40px}
.mb-0{margin-bottom:0}