:root{
  --blue:#16357f;--blue-d:#0e2152;--blue-l:#eaf0fb;--red:#d90d1c;--red-d:#b00814;--yellow:#fecc00;
  --ink:#172033;--muted:#566176;--line:#dfe4ec;--bg:#fff;--alt:#f4f6fa;--radius:14px;
  --shadow:0 1px 2px rgba(16,30,70,.06),0 8px 24px rgba(16,30,70,.08);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;font-size:17px;line-height:1.6;color:var(--ink);background:var(--bg)}
img{max-width:100%;height:auto;display:block}
a{color:var(--blue)}
a:focus-visible,.btn:focus-visible{outline:3px solid var(--yellow);outline-offset:2px}
h1,h2,h3{line-height:1.15;margin:0 0 .5em;letter-spacing:-.01em;text-wrap:balance}
p{margin:0 0 1em}
.wrap{width:min(1140px,100% - 40px);margin-inline:auto}
.skip{position:absolute;left:-999px}
.skip:focus{left:12px;top:12px;z-index:100;background:#fff;padding:8px 12px;border-radius:8px}
.small{font-size:.86rem}.muted{color:var(--muted)}

/* En-tête */
.top{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.top-in{display:flex;align-items:center;gap:20px;min-height:72px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink);margin-right:auto}
.brand img{width:52px;height:auto}
.brand strong{display:block;font-size:1.25rem;letter-spacing:.04em;color:var(--blue);line-height:1}
.brand small{display:block;font-size:.74rem;color:var(--muted);margin-top:4px}
.nav{display:flex;gap:4px}
.nav a{padding:8px 12px;border-radius:8px;text-decoration:none;color:var(--ink);font-weight:600;font-size:.95rem}
.nav a:hover{background:var(--blue-l);color:var(--blue)}

/* Boutons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 18px;border-radius:999px;font-weight:700;text-decoration:none;white-space:nowrap;border:2px solid transparent;transition:background .15s,transform .15s}
.btn:hover{transform:translateY(-1px)}
.btn-lg{padding:14px 26px;font-size:1.06rem}
.btn-red{background:var(--red);color:#fff}.btn-red:hover{background:var(--red-d)}
.btn-blue{background:var(--blue);color:#fff}.btn-blue:hover{background:var(--blue-d)}
.btn-light{background:#fff;color:var(--blue-d)}.btn-light:hover{background:var(--blue-l)}

/* Bandeau */
.hero{position:relative;isolation:isolate;color:#fff;background:var(--blue-d);overflow:hidden}
.hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:-2}
.hero::after{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(100deg,rgba(10,24,62,.93) 0%,rgba(14,33,82,.8) 38%,rgba(14,33,82,.28) 72%,rgba(14,33,82,.12) 100%)}
.hero-plain{background:linear-gradient(120deg,var(--blue-d),var(--blue))}
.hero-plain::after{background:radial-gradient(circle at 90% 0,rgba(254,204,0,.16),transparent 45%)}
.hero-in{padding:88px 0 80px;max-width:1140px}
.hero-sm .hero-in{padding:48px 0 56px}
.hero h1{font-size:clamp(2rem,4.6vw,3.3rem);max-width:19ch;margin-bottom:.4em}
.hero-sm h1{font-size:clamp(1.75rem,3.6vw,2.6rem);max-width:24ch}
.kicker{display:inline-block;font-weight:700;font-size:.82rem;letter-spacing:.08em;text-transform:uppercase;color:var(--yellow);margin-bottom:14px}
.hero-lead{font-size:1.15rem;max-width:58ch;color:#e6ecf8}
.hero-btns{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.proofs{list-style:none;padding:0;margin:44px 0 0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;max-width:880px}
.proofs li{padding:14px 16px;border-left:3px solid var(--yellow);background:rgba(255,255,255,.08);border-radius:0 10px 10px 0;font-size:.95rem;color:#e6ecf8}
.proofs strong{display:block;color:#fff;font-size:1.05rem}
.crumbs{font-size:.88rem;margin-bottom:18px;color:#c9d4ee}
.crumbs a{color:#fff}

/* Sections */
.section{padding:72px 0}
.alt{background:var(--alt)}
.h2{font-size:clamp(1.55rem,2.8vw,2.1rem);color:var(--blue-d)}
.lead{font-size:1.1rem;color:var(--muted);max-width:62ch;margin-bottom:1.6em}

.cards{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);display:flex;flex-direction:column}
.card-img img{aspect-ratio:3/2;object-fit:cover;width:100%}
.card-body{padding:20px;display:flex;flex-direction:column;flex:1}
.card h3{font-size:1.25rem}.card h3 a{color:var(--blue-d);text-decoration:none}
.card p{color:var(--muted);font-size:.97rem;flex:1}
.more{font-weight:700;text-decoration:none;color:var(--red)}
.more::after{content:" →"}

.services{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.services a{display:block;height:100%;padding:18px 20px;background:#fff;border:1px solid var(--line);border-left:4px solid var(--blue);border-radius:10px;text-decoration:none;color:var(--ink);transition:border-color .15s,box-shadow .15s}
.services a:hover{border-left-color:var(--red);box-shadow:var(--shadow)}
.services strong{display:block;color:var(--blue-d);font-size:1.06rem;margin-bottom:4px}
.services span{font-size:.92rem;color:var(--muted)}

.about{display:grid;grid-template-columns:200px 1fr;gap:48px;align-items:center}
.about img{width:200px}

.chips{list-style:none;padding:0;margin:0 0 18px;display:flex;flex-wrap:wrap;gap:8px}
.chips li{padding:7px 14px;border-radius:999px;background:var(--blue-l);color:var(--blue-d);font-weight:600;font-size:.93rem}

.cols{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:48px;align-items:start}
.checks{list-style:none;padding:0;margin:0 0 1.6em;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px 28px}
.checks li{position:relative;padding-left:30px}
.checks li::before{content:"";position:absolute;left:0;top:.28em;width:18px;height:18px;border-radius:50%;background:var(--blue) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='none' stroke='%23fff' stroke-width='3.4' stroke-linecap='round' stroke-linejoin='round' d='M6 12.5l4 4 8-9'/%3E%3C/svg%3E") center/12px no-repeat}
.side{position:sticky;top:96px;padding:26px;border-radius:var(--radius);background:var(--alt);border:1px solid var(--line);display:grid;gap:12px}
.side h2{font-size:1.25rem;color:var(--blue-d);margin:0}
.side p{margin:0;color:var(--muted);font-size:.97rem}
.side .btn{white-space:normal;word-break:break-word}

.links{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:10px}
.links a{display:block;padding:9px 16px;border-radius:999px;background:#fff;border:1px solid var(--line);text-decoration:none;font-weight:600;font-size:.95rem}
.links a:hover{border-color:var(--blue)}

.cta{background:var(--blue-d);color:#fff;padding:56px 0}
.cta-in{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px}
.cta h2{font-size:clamp(1.4rem,2.6vw,1.9rem);margin-bottom:.3em}
.cta p{margin:0;color:#d5def2;max-width:52ch}
.cta-btns{display:flex;flex-wrap:wrap;gap:12px}

.contact-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.contact-card{display:block;padding:28px;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);text-decoration:none;color:var(--ink);background:#fff}
.contact-card h2{font-size:1.1rem;color:var(--muted);font-weight:600}
.contact-card .big{font-size:1.4rem;font-weight:800;color:var(--blue-d);margin-bottom:.4em;word-break:break-word}
.contact-card p:last-child{margin:0}
.ico{display:inline-grid;place-items:center;width:42px;height:42px;border-radius:50%;background:var(--red);color:#fff;margin-bottom:14px}
.prose{max-width:70ch}.prose h2{font-size:1.3rem;color:var(--blue-d);margin-top:1.6em}

/* Pied de page */
.foot{background:#0b1838;color:#c3cde4;font-size:.95rem;padding-top:56px}
.foot a{color:#fff}
.foot-grid{display:grid;grid-template-columns:1.1fr 1.5fr 1fr;gap:40px}
.foot-name{color:#fff;font-weight:800;font-size:1.05rem}
.foot-title{color:#fff;font-weight:700;text-transform:uppercase;letter-spacing:.07em;font-size:.8rem}
.foot-list{list-style:none;padding:0;margin:0;columns:2;column-gap:24px}
.foot-list li{margin-bottom:6px;break-inside:avoid}
.foot-list a{text-decoration:none;color:#c3cde4}.foot-list a:hover{color:#fff;text-decoration:underline}
.foot-end{margin-top:36px;padding:18px 0;border-top:1px solid rgba(255,255,255,.12);font-size:.85rem}
.foot-end p{margin:0}
.mobile-call{display:none}

@media (max-width:980px){
  .cards{grid-template-columns:repeat(2,minmax(0,1fr))}
  .services{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cols{grid-template-columns:1fr}.side{position:static}
  .contact-grid,.foot-grid{grid-template-columns:1fr}
  .nav a{padding:8px}
}
@media (max-width:760px){
  body{font-size:16px;padding-bottom:64px}
  .wrap{width:min(1140px,100% - 32px)}
  .top-in{flex-wrap:wrap;gap:0 12px;min-height:0;padding:10px 0 0}
  .brand img{width:44px}.brand small{display:none}
  .call span{display:none}.call{padding:10px;border-radius:50%}
  .nav{order:3;width:100%;overflow-x:auto;gap:0;margin:6px -16px 0;padding:0 8px;border-top:1px solid var(--line);scrollbar-width:none}
  .nav a{white-space:nowrap;padding:10px;font-size:.9rem}
  .hero-in{padding:52px 0 48px}.hero-sm .hero-in{padding:32px 0 40px}
  .hero::after{background:linear-gradient(180deg,rgba(10,24,62,.9),rgba(14,33,82,.8))}
  .hero-btns .btn,.cta-btns .btn{flex:1 1 100%}
  .proofs{grid-template-columns:1fr;margin-top:30px}
  .section{padding:48px 0}
  .cards,.services,.checks{grid-template-columns:1fr}
  .about{grid-template-columns:1fr;gap:24px}.about img{width:130px}
  .foot-list{columns:1}
  .mobile-call{display:flex;align-items:center;justify-content:center;gap:10px;position:fixed;left:0;right:0;bottom:0;z-index:60;padding:16px;background:var(--red);color:#fff;font-weight:800;text-decoration:none;box-shadow:0 -4px 16px rgba(0,0,0,.2)}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.btn{transition:none}}
@media print{.top,.mobile-call,.cta,.hero-btns{display:none}.hero{color:#000;background:none}.hero::after,.hero-bg{display:none}}

/* Formulaire de contact */
.contact-cols{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:40px;align-items:start}
.contact-side{display:grid;gap:18px}
.contact-side .contact-card{padding:22px}
.form{padding:32px;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);background:#fff}
.form .row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 18px}
.form label{display:block;font-weight:600;font-size:.93rem;margin-bottom:6px}
.form input,.form select,.form textarea{width:100%;padding:12px 14px;border:1px solid #c3cbd9;border-radius:10px;font:inherit;color:var(--ink);background:#fff}
.form textarea{resize:vertical;min-height:140px}
.form input:focus,.form select:focus,.form textarea:focus{outline:3px solid var(--blue-l);border-color:var(--blue)}
.form button{cursor:pointer;font-family:inherit}
.hp{position:absolute!important;left:-9999px;width:1px;height:1px;overflow:hidden}
@media (max-width:980px){.contact-cols{grid-template-columns:1fr}}
@media (max-width:760px){.form{padding:22px 18px}.form .row{grid-template-columns:1fr}.form button{width:100%}}

/* Vignettes des prestations */
.services a{padding:0 0 18px;border-left:1px solid var(--line);overflow:hidden;border-radius:var(--radius)}
.services a:hover{border-color:var(--blue)}
.services img{width:100%;aspect-ratio:16/9;object-fit:cover;margin-bottom:14px}
.services strong,.services span{display:block;padding:0 18px}

/* Accueil : bandeau avec photo de chantier */
.hero-split .hero-in{display:grid;grid-template-columns:minmax(0,1fr) 400px;column-gap:56px;padding:64px 0}
.hero-split .hero-in>*{grid-column:1}
.hero-split .hero-in>.kicker{justify-self:start}
.hero-split .hero-photo{grid-column:2;grid-row:1/span 5;align-self:center;margin:0}
.hero-photo img{width:100%;border-radius:18px;border:5px solid #fff;box-shadow:0 20px 50px rgba(0,0,0,.35);transform:rotate(1.5deg)}
.hero-split .proofs{grid-template-columns:repeat(3,minmax(0,1fr));margin-top:34px}
@media (max-width:980px){
  .hero-split .hero-in{grid-template-columns:1fr;padding:44px 0}
  .hero-split .hero-photo{grid-column:1;grid-row:auto;max-width:440px;margin:30px auto 0;width:100%}
  .hero-split .proofs{margin-top:28px}
}
@media (max-width:760px){.hero-split .proofs{grid-template-columns:1fr}}

/* Facebook */
.fb{display:inline-flex;align-items:center;gap:8px;padding:8px 14px;border-radius:999px;background:#1877f2;color:#fff!important;text-decoration:none;font-weight:700;font-size:.9rem}
.fb:hover{background:#0f63d3}
.ico-fb{background:#1877f2}

.fb-top{display:inline-grid;place-items:center;flex:none;width:46px;height:46px;margin-left:-8px;border-radius:50%;background:#1877f2;color:#fff;transition:background .15s,transform .15s}
.fb-top:hover{background:#0f63d3;transform:translateY(-1px)}
.fb-top svg{width:26px;height:26px}
@media (max-width:760px){.fb-top{width:40px;height:40px;margin-left:0}.fb-top svg{width:22px;height:22px}}