/* MN BTP SUD — design system
   Palette tirée du logo (marine + bleu) réchauffée de crème (rappel des sols béton ciré). */
:root{
  --marine:#22304A; --marine-d:#18243A; --marine-l:#33456A;
  --bleu:#4A9FE0; --bleu-d:#2F86CA; --bleu-pale:#E8F2FB;
  --creme:#FAF7F2; --sable:#EFE8DE; --sable-d:#D9CEBF;
  --ink:#1B2536; --ink2:#5A6579; --line:#E4E0D8;
  --blanc:#fff;
  --serif:'Fraunces',Georgia,serif;
  --sans:'Manrope',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  --wrap:1180px; --r:14px;
  --sh:0 1px 2px rgba(27,37,54,.04),0 8px 28px rgba(27,37,54,.07);
  --sh-l:0 20px 60px rgba(27,37,54,.13);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--sans);background:var(--creme);color:var(--ink);line-height:1.7;font-size:17px;font-weight:400;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{line-height:1.15;font-weight:700;letter-spacing:-.02em}
h1{font-size:clamp(2.1rem,5.2vw,3.9rem)}
h2{font-size:clamp(1.7rem,3.6vw,2.7rem)}
h3{font-size:clamp(1.15rem,2vw,1.4rem)}
p{color:var(--ink2)}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}
.center{text-align:center}
.eyebrow{display:inline-block;font-size:.76rem;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--bleu-d);margin-bottom:14px}
.lead{font-size:1.12rem;max-width:62ch}
.center .lead{margin-inline:auto}

/* ---------- Header ---------- */
header{position:sticky;top:0;z-index:60;background:rgba(250,247,242,.88);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;gap:22px;justify-content:space-between;max-width:var(--wrap);margin:0 auto;padding:11px 24px}
.brand{display:flex;align-items:center;gap:11px;font-weight:800;font-size:1.06rem;letter-spacing:-.02em;color:var(--marine)}
.brand img{width:42px;height:auto}
.brand small{display:block;font-size:.63rem;font-weight:600;letter-spacing:.04em;color:var(--ink2);text-transform:none}
.menu{display:flex;align-items:center;gap:26px;font-size:.93rem;font-weight:600}
.menu a{color:var(--marine);padding:6px 0;border-bottom:2px solid transparent;transition:.2s}
.menu a:hover,.menu a[aria-current]{border-color:var(--bleu);color:var(--bleu-d)}
.nav-tel{display:inline-flex;align-items:center;gap:8px;background:var(--marine);color:#fff;padding:11px 20px;border-radius:100px;font-weight:700;font-size:.92rem;white-space:nowrap;transition:.25s}
.nav-tel:hover{background:var(--bleu-d);transform:translateY(-1px)}
.burger{display:none;background:none;border:0;cursor:pointer;padding:8px;color:var(--marine)}
.burger svg{width:26px;height:26px}

/* ---------- Boutons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;padding:15px 30px;border-radius:100px;font-weight:700;font-size:.97rem;border:2px solid transparent;cursor:pointer;transition:.25s;text-align:center}
.btn-p{background:var(--bleu);color:#fff;box-shadow:0 8px 24px rgba(74,159,224,.32)}
.btn-p:hover{background:var(--bleu-d);transform:translateY(-2px);box-shadow:0 12px 30px rgba(74,159,224,.4)}
.btn-s{background:transparent;color:var(--marine);border-color:var(--sable-d)}
.btn-s:hover{border-color:var(--marine);background:var(--blanc)}
.btn-w{background:#fff;color:var(--marine)}
.btn-w:hover{transform:translateY(-2px)}
.btns{display:flex;gap:13px;flex-wrap:wrap}
.center .btns{justify-content:center}

/* ---------- Hero ---------- */
.hero{position:relative;padding:76px 0 84px;background:
  radial-gradient(1000px 500px at 82% -8%,rgba(74,159,224,.16),transparent 62%),
  linear-gradient(180deg,var(--sable) 0%,var(--creme) 78%)}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:56px;align-items:center}
.hero h1{color:var(--marine)}
.hero h1 em{font-style:normal;color:var(--bleu-d)}
.hero .lead{margin:20px 0 30px}
.hero-media{position:relative;border-radius:22px;overflow:hidden;box-shadow:var(--sh-l);aspect-ratio:4/5;background:var(--sable-d)}
.hero-media img{width:100%;height:100%;object-fit:cover}
.hero-badge{position:absolute;left:18px;bottom:18px;background:rgba(255,255,255,.95);backdrop-filter:blur(8px);border-radius:12px;padding:12px 16px;font-size:.84rem;font-weight:700;color:var(--marine);box-shadow:var(--sh)}
.hero-badge span{display:block;font-weight:500;color:var(--ink2);font-size:.78rem}
.trust{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.trust li{list-style:none;display:inline-flex;align-items:center;gap:7px;background:rgba(255,255,255,.75);border:1px solid var(--line);padding:8px 15px;border-radius:100px;font-size:.85rem;font-weight:600;color:var(--marine)}
.trust svg{width:15px;height:15px;color:var(--bleu-d);flex:none}

/* ---------- Sections ---------- */
section{padding:76px 0}
.sec-head{max-width:66ch;margin-bottom:44px}
.center .sec-head{margin-inline:auto}
.bg-w{background:var(--blanc)}
.bg-marine{background:var(--marine);color:#fff}
.bg-marine h2,.bg-marine h3{color:#fff}
.bg-marine p{color:rgba(255,255,255,.76)}
.bg-marine .eyebrow{color:var(--bleu)}

/* ---------- Cartes services ---------- */
.grid{display:grid;gap:22px}
.g3{grid-template-columns:repeat(auto-fit,minmax(290px,1fr))}
.g2{grid-template-columns:repeat(auto-fit,minmax(340px,1fr))}
.g4{grid-template-columns:repeat(auto-fit,minmax(215px,1fr))}
.card{background:var(--blanc);border:1px solid var(--line);border-radius:var(--r);padding:30px 26px;transition:.28s;position:relative;overflow:hidden}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-l);border-color:var(--bleu)}
.card .ic{width:50px;height:50px;border-radius:13px;background:var(--bleu-pale);display:grid;place-items:center;margin-bottom:17px}
.card .ic svg{width:25px;height:25px;color:var(--bleu-d)}
.card h3{color:var(--marine);margin-bottom:9px}
.card p{font-size:.95rem}
.card .more{display:inline-flex;align-items:center;gap:6px;margin-top:15px;font-weight:700;font-size:.9rem;color:var(--bleu-d)}
.card .more::after{content:"→";transition:.25s}
.card:hover .more::after{transform:translateX(4px)}
.card-link::after{content:"";position:absolute;inset:0}

/* ---------- Liste à puces ---------- */
.checks{list-style:none;display:grid;gap:11px;margin-top:8px}
.checks li{display:flex;gap:11px;align-items:flex-start;font-size:.97rem;color:var(--ink2)}
.checks li::before{content:"";flex:none;width:21px;height:21px;margin-top:2px;border-radius:50%;background:var(--bleu-pale) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%232F86CA' stroke-width='3.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E") center/12px no-repeat}
.bg-marine .checks li{color:rgba(255,255,255,.82)}
.bg-marine .checks li::before{background-color:rgba(74,159,224,.22)}

/* ---------- Étapes ---------- */
.steps{counter-reset:s;display:grid;gap:20px;grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}
.step{position:relative;padding:28px 24px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:var(--r)}
.step::before{counter-increment:s;content:"0" counter(s);display:block;font-size:1.7rem;font-weight:800;color:var(--bleu);margin-bottom:10px;letter-spacing:-.03em}
.step h3{font-size:1.06rem;margin-bottom:7px}
.step p{font-size:.92rem}

/* ---------- Galerie ---------- */
.gallery{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}
.shot{border-radius:var(--r);overflow:hidden;background:var(--sable-d);aspect-ratio:4/3;box-shadow:var(--sh)}
.shot img{width:100%;height:100%;object-fit:cover;transition:.5s}
.shot:hover img{transform:scale(1.04)}
.shot.tall{aspect-ratio:3/4}

/* ---------- Zone d'intervention ---------- */
.zones{display:flex;flex-wrap:wrap;gap:9px;margin-top:22px}
.zones a,.zones span{background:var(--blanc);border:1px solid var(--line);border-radius:100px;padding:8px 17px;font-size:.9rem;font-weight:600;color:var(--marine);transition:.2s}
.zones a:hover{border-color:var(--bleu);color:var(--bleu-d)}

/* ---------- FAQ ---------- */
.faq{max-width:820px;margin:0 auto;display:grid;gap:12px}
.faq details{background:var(--blanc);border:1px solid var(--line);border-radius:var(--r);padding:20px 24px;transition:.2s}
.faq details[open]{border-color:var(--bleu);box-shadow:var(--sh)}
.faq summary{cursor:pointer;font-weight:700;color:var(--marine);list-style:none;display:flex;justify-content:space-between;gap:16px;align-items:center;font-size:1.02rem}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:1.5rem;font-weight:400;color:var(--bleu-d);transition:.25s;line-height:1}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq p{margin-top:12px;font-size:.97rem}

/* ---------- Devis / contact ---------- */
.devis{background:linear-gradient(135deg,var(--marine),var(--marine-l));border-radius:24px;padding:52px 44px;color:#fff;box-shadow:var(--sh-l)}
.devis h2{color:#fff}
.devis p{color:rgba(255,255,255,.78)}
.form{display:grid;gap:15px;margin-top:26px}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:15px}
.form label{display:block;font-size:.83rem;font-weight:700;margin-bottom:6px;color:rgba(255,255,255,.9)}
.form input,.form select,.form textarea{width:100%;padding:13px 16px;border-radius:11px;border:1px solid rgba(255,255,255,.22);background:rgba(255,255,255,.1);color:#fff;font-family:inherit;font-size:.97rem;transition:.2s}
.form input::placeholder,.form textarea::placeholder{color:rgba(255,255,255,.45)}
.form input:focus,.form select:focus,.form textarea:focus{outline:none;border-color:var(--bleu);background:rgba(255,255,255,.16)}
.form select option{color:var(--ink);background:#fff}
.form textarea{resize:vertical;min-height:110px}
.form .mini{font-size:.79rem;color:rgba(255,255,255,.6)}
.contact-cards{display:grid;gap:14px}
.ccard{display:flex;gap:14px;align-items:center;background:var(--blanc);border:1px solid var(--line);border-radius:var(--r);padding:19px 22px;transition:.25s}
.ccard:hover{border-color:var(--bleu);transform:translateY(-2px);box-shadow:var(--sh)}
.ccard .ic{width:44px;height:44px;border-radius:12px;background:var(--bleu-pale);display:grid;place-items:center;flex:none}
.ccard .ic svg{width:21px;height:21px;color:var(--bleu-d)}
.ccard b{display:block;color:var(--marine);font-size:1rem}
.ccard span{font-size:.88rem;color:var(--ink2)}

/* ---------- Bandeau CTA ---------- */
.cta-band{background:linear-gradient(135deg,var(--bleu-d),var(--bleu));color:#fff;border-radius:24px;padding:46px 40px;text-align:center;box-shadow:var(--sh-l)}
.cta-band h2{color:#fff;margin-bottom:12px}
.cta-band p{color:rgba(255,255,255,.88);max-width:56ch;margin:0 auto 26px}

/* ---------- Footer ---------- */
footer{background:var(--marine-d);color:rgba(255,255,255,.72);padding:60px 0 26px;font-size:.92rem}
.fgrid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:38px;padding-bottom:36px;border-bottom:1px solid rgba(255,255,255,.12)}
footer h4{color:#fff;font-size:.82rem;letter-spacing:.13em;text-transform:uppercase;margin-bottom:16px;font-weight:700}
footer a{color:rgba(255,255,255,.72);transition:.2s;display:inline-block;padding:3px 0}
footer a:hover{color:var(--bleu)}
footer ul{list-style:none;display:grid;gap:3px}
.fbrand{display:flex;align-items:center;gap:11px;margin-bottom:14px;color:#fff;font-weight:800;font-size:1.05rem}
.fbrand img{width:46px;height:auto}
.fbot{display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;padding-top:22px;font-size:.85rem;color:rgba(255,255,255,.5)}

/* ---------- Barre mobile fixe ---------- */
.mobar{display:none;position:fixed;left:0;right:0;bottom:0;z-index:70;background:rgba(255,255,255,.97);backdrop-filter:blur(12px);border-top:1px solid var(--line);padding:9px 12px;gap:9px;box-shadow:0 -4px 22px rgba(27,37,54,.1)}
.mobar a{flex:1;display:flex;align-items:center;justify-content:center;gap:7px;padding:13px;border-radius:12px;font-weight:700;font-size:.92rem}
.mobar .t{background:var(--marine);color:#fff}
.mobar .d{background:var(--bleu);color:#fff}
.mobar svg{width:17px;height:17px}

/* ---------- Fil d'Ariane ---------- */
.bc{font-size:.85rem;color:var(--ink2);padding:20px 0 0}
.bc a{color:var(--bleu-d);font-weight:600}
.bc span{opacity:.6;margin:0 7px}

/* ---------- Page service : intro ---------- */
.svc-hero{background:linear-gradient(180deg,var(--sable),var(--creme));padding:44px 0 66px}
.svc-hero h1{color:var(--marine);margin-bottom:18px}
.prose{max-width:74ch}
.prose h2{color:var(--marine);margin:42px 0 16px}
.prose h3{color:var(--marine);margin:28px 0 10px}
.prose p{margin-bottom:15px}
.prose ul{margin:0 0 18px 0;padding-left:0;list-style:none;display:grid;gap:10px}
.prose ul li{display:flex;gap:11px;align-items:flex-start;color:var(--ink2)}
.prose ul li::before{content:"";flex:none;width:7px;height:7px;margin-top:11px;border-radius:50%;background:var(--bleu)}
.aside{background:var(--blanc);border:1px solid var(--line);border-left:4px solid var(--bleu);border-radius:12px;padding:24px 26px;margin:30px 0}
.aside p:last-child{margin-bottom:0}
.split{display:grid;grid-template-columns:1.35fr .65fr;gap:48px;align-items:start}
.sticky-box{position:sticky;top:96px;background:var(--marine);color:#fff;border-radius:var(--r);padding:28px 26px}
.sticky-box h3{color:#fff;margin-bottom:10px}
.sticky-box p{color:rgba(255,255,255,.76);font-size:.93rem;margin-bottom:18px}
.sticky-box .btn{width:100%;margin-bottom:9px}

/* ---------- Responsive ---------- */
@media(max-width:960px){
  .hero-grid{grid-template-columns:1fr;gap:38px}
  .hero-media{aspect-ratio:16/11;max-height:400px}
  .split{grid-template-columns:1fr;gap:32px}
  .sticky-box{position:static}
  .fgrid{grid-template-columns:1fr 1fr;gap:30px}
}
@media(max-width:760px){
  body{font-size:16px}
  section{padding:56px 0}
  .menu{position:fixed;inset:57px 0 auto 0;background:var(--creme);flex-direction:column;align-items:stretch;gap:0;padding:10px 20px 22px;border-bottom:1px solid var(--line);box-shadow:var(--sh);display:none}
  .menu.open{display:flex}
  .menu a{padding:13px 4px;border-bottom:1px solid var(--line)}
  .burger{display:block}
  .nav-tel{display:none}
  .devis{padding:34px 22px;border-radius:18px}
  .cta-band{padding:34px 22px;border-radius:18px}
  .row2{grid-template-columns:1fr}
  .mobar{display:flex}
  body{padding-bottom:72px}
  .fgrid{grid-template-columns:1fr;gap:26px}
  .brand small{display:none}
}
@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}

/* ============================================================
   ANIMATIONS — apparition au scroll, entrée du hero, micro-interactions
   Entièrement désactivées si l'utilisateur préfère moins d'animations.
   ============================================================ */

/* État initial : uniquement si JS est actif (classe posée sur <html>) */
.js .reveal{opacity:0;transform:translateY(26px);transition:opacity .75s cubic-bezier(.22,.61,.36,1),transform .75s cubic-bezier(.22,.61,.36,1)}
.js .reveal.in{opacity:1;transform:none}
/* Décalage en cascade pour les grilles de cartes */
.js .reveal.d1{transition-delay:.08s}
.js .reveal.d2{transition-delay:.16s}
.js .reveal.d3{transition-delay:.24s}
.js .reveal.d4{transition-delay:.32s}
.js .reveal.d5{transition-delay:.40s}
.js .reveal.d6{transition-delay:.48s}

/* Variante latérale (blocs texte des pages service) */
.js .reveal-l{opacity:0;transform:translateX(-22px);transition:opacity .7s ease,transform .7s cubic-bezier(.22,.61,.36,1)}
.js .reveal-l.in{opacity:1;transform:none}

/* Révélation d'image : léger zoom qui se relâche */
.js .reveal-img img{transform:scale(1.08);transition:transform 1.1s cubic-bezier(.22,.61,.36,1),opacity .8s ease;opacity:0}
.js .reveal-img.in img{transform:scale(1);opacity:1}

/* Entrée du hero au chargement (pas au scroll) */
@keyframes heroUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:none}}
@keyframes heroMedia{from{opacity:0;transform:translateY(26px) scale(.97)}to{opacity:1;transform:none}}
.js .hero-grid>div:first-child>*{animation:heroUp .8s cubic-bezier(.22,.61,.36,1) both}
.js .hero-grid>div:first-child>*:nth-child(1){animation-delay:.05s}
.js .hero-grid>div:first-child>*:nth-child(2){animation-delay:.14s}
.js .hero-grid>div:first-child>*:nth-child(3){animation-delay:.23s}
.js .hero-grid>div:first-child>*:nth-child(4){animation-delay:.32s}
.js .hero-grid>div:first-child>*:nth-child(5){animation-delay:.41s}
.js .hero-media{animation:heroMedia 1s cubic-bezier(.22,.61,.36,1) .2s both}
.hero-badge{animation:heroUp .7s ease .95s both}

/* Header : ombre + compactage au scroll */
header{transition:box-shadow .3s ease,background .3s ease}
header.scrolled{box-shadow:0 4px 24px rgba(27,37,54,.09);background:rgba(250,247,242,.95)}

/* Micro-interactions */
.card .ic{transition:transform .35s cubic-bezier(.34,1.56,.64,1),background .3s ease}
.card:hover .ic{transform:scale(1.09) rotate(-4deg);background:#d9ebfa}
.trust li{transition:transform .25s ease,border-color .25s ease}
.trust li:hover{transform:translateY(-2px);border-color:var(--bleu)}
.step{transition:transform .3s ease,background .3s ease,border-color .3s ease}
.step:hover{transform:translateY(-3px);background:rgba(255,255,255,.1);border-color:rgba(74,159,224,.45)}
.zones a{transition:transform .2s ease,border-color .2s ease,color .2s ease}
.zones a:hover{transform:translateY(-2px)}
.ccard .ic{transition:transform .35s cubic-bezier(.34,1.56,.64,1)}
.ccard:hover .ic{transform:scale(1.1)}
.btn-p{position:relative;overflow:hidden}
.btn-p::after{content:"";position:absolute;inset:0;background:linear-gradient(120deg,transparent 30%,rgba(255,255,255,.28),transparent 70%);transform:translateX(-120%)}
.btn-p:hover::after{transform:translateX(120%);transition:transform .75s ease}
.faq details{transition:border-color .25s ease,box-shadow .25s ease,transform .25s ease}
.faq details[open]{transform:translateY(-1px)}
.faq summary{transition:color .2s ease}
.faq summary:hover{color:var(--bleu-d)}
.prose h2{position:relative;padding-left:16px}
.prose h2::before{content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:4px;border-radius:3px;background:var(--bleu);transform:scaleY(0);transform-origin:top;transition:transform .5s cubic-bezier(.22,.61,.36,1)}
.js .prose h2.in::before{transform:scaleY(1)}

/* Barre mobile : petite entrée */
@keyframes barUp{from{transform:translateY(100%)}to{transform:none}}
.js .mobar{animation:barUp .5s ease .6s both}

/* Respect absolu de la préférence système */
@media(prefers-reduced-motion:reduce){
  .js .reveal,.js .reveal-l,.js .reveal-img img{opacity:1!important;transform:none!important;transition:none!important}
  .js .hero-grid>div:first-child>*,.js .hero-media,.hero-badge,.js .mobar{animation:none!important;opacity:1!important;transform:none!important}
  .js .prose h2::before{transform:scaleY(1)!important}
}