:root{
  --indigo:#4B4BA8;      /* texte du logo */
  --indigo-dark:#2B2A63; /* titres, pied de page */
  --gold:#E0B422;        /* clé et tour Eiffel du logo */
  --gold-deep:#7A5C00;   /* or foncé lisible sur fond clair */
  --paper:#FFFFFF;
  --mist:#F4F3FB;        /* fond de section */
  --ink:#26253F;
  --line:#DAD8EE;
  --radius:14px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font:1.0625rem/1.65 Georgia,"Times New Roman",serif;color:var(--ink);background:var(--paper);-webkit-text-size-adjust:100%}
h1,h2,h3,.btn,nav,label,summary,.brand{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
img,svg{max-width:100%;height:auto}
a{color:var(--indigo)}
:focus-visible{outline:3px solid var(--gold);outline-offset:3px}
.wrap{width:min(1080px,100% - 2.5rem);margin-inline:auto}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}

/* En-tête */
header{background:#fff;border-bottom:1px solid var(--line)}
header .wrap{display:flex;align-items:center;justify-content:space-between;gap:.5rem 1.5rem;padding-block:.4rem;flex-wrap:wrap}
.brand img{display:block;height:88px;width:auto}
nav ul{display:flex;flex-wrap:wrap;gap:.5rem 1.25rem;list-style:none;margin:0;padding:0;align-items:center}
nav a{text-decoration:none;color:var(--indigo-dark);font-weight:600;font-size:.95rem}
nav a:hover{color:var(--indigo)}
.lang{display:flex;gap:.25rem;font:700 .85rem -apple-system,"Segoe UI",Roboto,Arial,sans-serif;border:1px solid var(--line);border-radius:999px;padding:.15rem}
.lang a,.lang span{padding:.3rem .6rem;border-radius:999px;font-size:.85rem}
.lang span{background:var(--indigo-dark);color:#fff}
@media (max-width:720px){.brand img{height:72px}nav a{font-size:.88rem}}

/* Boutons */
.btn{display:inline-block;padding:.95rem 1.7rem;border-radius:999px;background:var(--gold);color:var(--indigo-dark);font-weight:700;font-size:1.05rem;text-decoration:none;border:2px solid var(--gold);cursor:pointer;transition:background .2s,color .2s}
.btn:hover{background:var(--indigo-dark);border-color:var(--indigo-dark);color:#fff}
.btn.small{padding:.55rem 1.1rem;font-size:.92rem}
.btn.ghost{background:transparent;border-color:var(--indigo);color:var(--indigo)}
.btn.ghost:hover{background:var(--indigo);color:#fff}

/* Héro */
.hero{background:linear-gradient(180deg,var(--mist),#fff);overflow:hidden}
.hero .wrap{padding-block:clamp(2.5rem,7vw,5.5rem)}
h1{font-size:clamp(2rem,5.4vw,3.4rem);line-height:1.12;color:var(--indigo-dark);margin:0 0 1rem;letter-spacing:-.01em}
.lead{font-size:clamp(1.05rem,2.4vw,1.25rem);max-width:34em;margin:0 0 1.75rem}
.cta-row{display:flex;flex-wrap:wrap;gap:.75rem}
.note{margin:1rem 0 0;font-size:.92rem;color:var(--gold-deep);font-family:-apple-system,"Segoe UI",Roboto,Arial,sans-serif}

/* Sections */
section{padding-block:clamp(3rem,7vw,5rem)}
h2{font-size:clamp(1.6rem,3.6vw,2.2rem);line-height:1.2;color:var(--indigo-dark);margin:0 0 .5rem}
.intro{max-width:40em;margin:0 0 2.25rem}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem}
@media (max-width:860px){.grid{grid-template-columns:1fr}}
.benefit{padding:1.5rem 0 0;border-top:4px solid var(--gold)}
.benefit h3{font-size:1.25rem;color:var(--indigo);margin:0 0 .5rem}
.benefit p{margin:0}
.alt{background:var(--mist)}

/* Avis */
blockquote{margin:0;padding:1.5rem;background:#fff;border-left:5px solid var(--gold);border-radius:0 var(--radius) var(--radius) 0}
blockquote p{margin:0 0 .75rem;font-style:italic}
blockquote footer{font:600 .9rem -apple-system,"Segoe UI",Roboto,Arial,sans-serif;color:var(--indigo)}

/* FAQ */
.faq{max-width:760px}
details{border-bottom:1px solid var(--line);padding:1rem 0}
summary{cursor:pointer;font-weight:700;font-size:1.1rem;color:var(--indigo-dark);list-style:none;display:flex;justify-content:space-between;gap:1rem}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";color:var(--gold-deep);font-size:1.5rem;line-height:1}
details[open] summary::after{content:"–"}
details p{margin:.75rem 0 0}

/* Formulaire devis */
.devis{background:var(--indigo-dark);color:#fff}
.devis h2{color:#fff}
.devis .intro{color:#E7E6F7}
form{display:grid;gap:1rem;grid-template-columns:1fr 1fr;max-width:760px}
form .full{grid-column:1/-1}
@media (max-width:640px){form{grid-template-columns:1fr}}
label{display:grid;gap:.35rem;font-weight:600;font-size:.95rem}
input,select,textarea{font:inherit;padding:.8rem;border-radius:10px;border:2px solid transparent;background:#fff;color:var(--ink);width:100%}
input:focus,select:focus,textarea:focus{border-color:var(--gold);outline:none}
.hp{position:absolute;left:-9999px}

/* Pied de page */
body>footer{background:#1D1C47;color:#CFCDEA;padding-block:2rem;font:.9rem/1.6 -apple-system,"Segoe UI",Roboto,Arial,sans-serif}
body>footer .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;gap:1rem}
body>footer a{color:#fff}
body>footer ul{list-style:none;display:flex;gap:1.25rem;margin:0;padding:0;flex-wrap:wrap}

/* Pages internes */
.crumbs{font:.88rem -apple-system,"Segoe UI",Roboto,Arial,sans-serif;padding-top:1.25rem;color:#5b5a80}
.crumbs a{color:var(--indigo)}
.page-hero{background:var(--mist);padding-block:clamp(2rem,5vw,3.5rem)}
.page-hero h1{font-size:clamp(1.8rem,4.6vw,2.8rem)}
.page-hero .lead{margin:0}
.cards{display:grid;grid-template-columns:repeat(2,1fr);gap:1.25rem}
@media (max-width:760px){.cards{grid-template-columns:1fr}}
.card{background:#fff;border:1px solid var(--line);border-top:4px solid var(--gold);border-radius:var(--radius);padding:1.25rem 1.4rem}
.card h3{font-size:1.15rem;color:var(--indigo);margin:0 0 .4rem}
.card p{margin:0;font-size:1rem}
.more{display:inline-block;margin-top:.9rem;font:700 .95rem -apple-system,"Segoe UI",Roboto,Arial,sans-serif}
.cta-band{background:var(--indigo-dark);color:#fff;text-align:center}
.cta-band h2{color:#fff}
.cta-band p{max-width:36em;margin:0 auto 1.5rem}
.contact-line{font-family:-apple-system,"Segoe UI",Roboto,Arial,sans-serif}
.contact-line a{color:#fff}
.other{display:flex;flex-wrap:wrap;gap:.75rem}