:root{
  --gold:#C8961E;
  --gold-l:#E3BC5C;
  --gold-d:#A47714;
  --bg:#FFFFFF;
  --bg-2:#F4F6FA;
  --card:#FFFFFF;
  --ink:#0F1E3A;
  --ink-soft:#33415C;
  --muted:#66708A;
  --line:#DFE4EE;
  --header:rgba(255,255,255,.92);
  --shadow:0 10px 30px rgba(15,30,58,.10);
  --radius:16px;
}
:root[data-theme="dark"]{
  --bg:#0A1428;
  --bg-2:#0F1C36;
  --card:#13223F;
  --ink:#F2F4F8;
  --ink-soft:#D3DAE6;
  --muted:#9AA6BD;
  --line:#24365A;
  --header:rgba(10,20,40,.9);
  --shadow:0 10px 30px rgba(0,8,25,.45);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"Inter",system-ui,sans-serif;font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased;transition:background .25s,color .25s}
img{max-width:100%;display:block}
a{color:inherit}
h1,h2,h3{font-family:"Cormorant Garamond",Georgia,serif;font-weight:700;line-height:1.08;letter-spacing:-.01em;margin:0}
h2{font-size:clamp(2rem,4.4vw,3.1rem)}
h3{font-size:1.65rem}
.wrap{width:min(1160px,100% - 32px);margin-inline:auto}
.skip{position:absolute;left:-999px;top:0;background:var(--ink);color:var(--bg);padding:10px 16px;z-index:100}
.skip:focus{left:0}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 26px;border-radius:999px;font-weight:600;font-size:1rem;text-decoration:none;border:2px solid transparent;cursor:pointer;transition:transform .15s,background .2s,color .2s,box-shadow .2s;font-family:inherit}
.btn:hover{transform:translateY(-2px)}
.btn-gold{background:linear-gradient(180deg,var(--gold-l),var(--gold));color:#0F1E3A;box-shadow:0 6px 18px rgba(200,150,30,.35)}
.btn-gold:hover{box-shadow:0 10px 24px rgba(200,150,30,.45)}
.btn-ghost-light{border-color:rgba(255,255,255,.7);color:#fff}
.btn-ghost-light:hover{background:#fff;color:#0F1E3A}
.btn-sm{padding:9px 18px;font-size:.92rem}

.eyebrow{text-transform:uppercase;letter-spacing:.18em;font-size:.78rem;font-weight:700;color:var(--gold);margin:0 0 12px}
.section{padding:96px 0}
.section-lead{color:var(--muted);font-size:1.12rem;max-width:60ch;margin:16px 0 0}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:var(--header);backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;gap:24px;height:76px}
.brand img{height:58px;width:auto}
.logo-d{display:none}
:root[data-theme="dark"] .logo-l{display:none}
:root[data-theme="dark"] .logo-d{display:block}
.nav{display:flex;gap:26px;margin-left:auto}
.nav a{text-decoration:none;font-weight:500;color:var(--ink-soft);font-size:.96rem}
.nav a:hover{color:var(--gold)}
.header-tools{display:flex;align-items:center;gap:12px}
.lang-switch{display:flex;border:1px solid var(--line);border-radius:999px;overflow:hidden}
.lang-switch button{background:none;border:0;padding:6px 11px;font:600 .8rem "Inter",sans-serif;color:var(--muted);cursor:pointer}
.lang-switch button.is-on{background:var(--gold);color:#0F1E3A}
.theme-toggle{width:38px;height:38px;border-radius:50%;border:1px solid var(--line);background:none;color:var(--ink);cursor:pointer;display:grid;place-items:center}
.theme-toggle svg{width:19px;height:19px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round}
.theme-toggle .i-moon{fill:currentColor;stroke:none}
.i-sun{display:none}
:root[data-theme="dark"] .i-sun{display:block}
:root[data-theme="dark"] .i-moon{display:none}

/* Hero */
.hero{position:relative;min-height:min(88vh,820px);display:flex;align-items:center;color:#fff;overflow:hidden;background:#0A1530}
.hero-bg{position:absolute;inset:0;background:linear-gradient(100deg,rgba(8,18,40,.88) 0%,rgba(8,18,40,.62) 48%,rgba(8,18,40,.25) 100%),url('assets/hero.jpg') center/cover no-repeat}
.hero-inner{position:relative;padding:72px 0;max-width:1160px}
.hero-logo{width:min(250px,60vw);height:auto;margin-bottom:22px;filter:drop-shadow(0 4px 18px rgba(0,0,0,.4))}
.hero h1{font-size:clamp(2.6rem,6.4vw,4.9rem);max-width:14ch}
.hero-lead{font-size:clamp(1.05rem,1.8vw,1.25rem);max-width:52ch;color:rgba(255,255,255,.86);margin:20px 0 0}
.hero-ctas{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-trust{list-style:none;padding:0;margin:34px 0 0;display:flex;flex-wrap:wrap;gap:10px 26px;font-weight:500;color:rgba(255,255,255,.9)}
.hero-trust li::before{content:"✓";color:var(--gold-l);font-weight:700;margin-right:8px}

/* Services */
.svc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:48px}
.svc-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);display:flex;flex-direction:column;transition:transform .2s}
.svc-card:hover{transform:translateY(-4px)}
.svc-img{aspect-ratio:16/10;background:linear-gradient(135deg,#1B2D52,#0F1E3A) center/cover no-repeat}
.svc-body{padding:24px 24px 28px}
.svc-body p{color:var(--muted);margin:10px 0 0}
.svc-list{list-style:none;padding:0;margin:16px 0 0;display:grid;gap:8px}
.svc-list li{padding-left:22px;position:relative;font-weight:500;color:var(--ink-soft)}
.svc-list li::before{content:"";position:absolute;left:0;top:.6em;width:10px;height:10px;border-radius:50%;background:var(--gold)}
.qualities{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:40px}
.q{padding:22px;border-radius:var(--radius);background:var(--bg-2);border:1px solid var(--line);display:flex;flex-direction:column;gap:6px}
.q-ico{color:var(--gold);font-size:1.2rem}
.q strong{font-family:"Cormorant Garamond",serif;font-size:1.45rem}
.q span:last-child{color:var(--muted);font-size:.95rem}

/* USP */
.usp{background:var(--bg-2);border-block:1px solid var(--line)}
.usp-inner{display:grid;grid-template-columns:1.3fr 1fr;gap:56px;align-items:center}
.usp-list{list-style:none;padding:0;margin:28px 0 0;display:grid;gap:18px}
.usp-list li{display:flex;flex-direction:column;padding-left:20px;border-left:3px solid var(--gold)}
.usp-list strong{font-size:1.08rem}
.usp-list span{color:var(--muted)}
.usp-card{background:#0F1E3A;color:#F2F4F8;border-radius:24px;padding:40px 36px;text-align:center;box-shadow:var(--shadow);border:1px solid rgba(200,150,30,.35)}
.usp-card-k{text-transform:uppercase;letter-spacing:.2em;font-size:.8rem;color:var(--gold-l);margin:0;font-weight:700}
.usp-card-big{font-family:"Cormorant Garamond",serif;font-size:2.6rem;font-weight:700;margin:8px 0 4px;color:#fff}
.usp-card-s{color:#C9D1E0;margin:0 0 26px}

/* Témoignages */
.testi-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:44px}
.testi-card{margin:0;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:14px}
.stars{font-size:20px;letter-spacing:4px;background:linear-gradient(180deg,#FFE37A,#F5C400 48%,#E09A00);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:#F5C400}
.testi-card blockquote{margin:0;font-size:1.04rem;color:var(--ink-soft);flex:1}
.testi-card figcaption{color:var(--muted);font-size:.92rem}
.testi-card figcaption strong{color:var(--ink)}

/* Devis */
.quote-form{margin-top:40px;display:grid;gap:22px}
.qf-block{border:1px solid var(--line);border-radius:var(--radius);padding:24px;margin:0;background:var(--card)}
.qf-block legend{font-family:"Cormorant Garamond",serif;font-weight:700;font-size:1.5rem;padding:0 8px}
.qf-cols{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.chips{display:flex;flex-wrap:wrap;gap:10px}
.chip input{position:absolute;opacity:0;pointer-events:none}
.chip span{display:inline-block;padding:9px 16px;border-radius:999px;border:1px solid var(--line);cursor:pointer;font-weight:500;font-size:.94rem;transition:all .15s;user-select:none}
.chip input:checked+span{background:var(--gold);border-color:var(--gold);color:#0F1E3A}
.chip input:focus-visible+span{outline:2px solid var(--gold);outline-offset:2px}
.field{display:flex;flex-direction:column;gap:6px;margin-top:12px;font-size:.9rem;font-weight:500;color:var(--ink-soft)}
.field input,.field select,.field textarea{font:inherit;font-size:1rem;padding:11px 13px;border-radius:10px;border:1px solid var(--line);background:var(--bg);color:var(--ink);width:100%}
.field input:focus,.field select:focus,.field textarea:focus{outline:2px solid var(--gold);outline-offset:0;border-color:var(--gold)}
.field.invalid input{border-color:#c0392b}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.surface-row{display:grid;grid-template-columns:1fr auto;gap:20px;align-items:end}
.surface-out{background:var(--bg-2);border:1px solid var(--line);border-radius:12px;padding:12px 20px;text-align:center;min-width:170px}
.surface-out span{display:block;font-size:.8rem;color:var(--muted)}
.surface-out strong{font-size:1.5rem;color:var(--gold)}
.hint{color:var(--muted);font-size:.86rem;margin:10px 0 0}

.calc{display:grid;gap:10px}
.cat{border:1px solid var(--line);border-radius:12px;overflow:hidden}
.cat>summary{list-style:none;cursor:pointer;padding:14px 18px;font-weight:600;display:flex;justify-content:space-between;align-items:center;background:var(--bg-2)}
.cat>summary::-webkit-details-marker{display:none}
.cat>summary::after{content:"+";font-size:1.3rem;color:var(--gold);transition:transform .2s}
.cat[open]>summary::after{transform:rotate(45deg)}
.cat-vol{margin-left:auto;margin-right:16px;font-weight:500;font-size:.88rem;color:var(--muted)}
.items{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:2px 24px;padding:10px 18px 16px}
.item{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:8px 0;border-bottom:1px dashed var(--line)}
.item-name{font-size:.94rem}
.stepper{display:flex;align-items:center;gap:6px;flex-shrink:0}
.stepper button{width:30px;height:30px;border-radius:50%;border:1px solid var(--line);background:var(--bg);color:var(--ink);font-size:1.05rem;line-height:1;cursor:pointer}
.stepper button:hover{border-color:var(--gold);color:var(--gold)}
.stepper output{min-width:24px;text-align:center;font-weight:600}
.item.has .item-name{color:var(--gold);font-weight:600}

.quote-bar{position:sticky;bottom:12px;z-index:5;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;background:#0F1E3A;color:#F2F4F8;border-radius:18px;padding:16px 20px 16px 26px;box-shadow:0 12px 30px rgba(0,0,0,.25);border:1px solid rgba(200,150,30,.4)}
.quote-total span{display:block;font-size:.82rem;color:#B4BED1}
.quote-total strong{font-size:1.7rem;color:var(--gold-l);font-family:"Cormorant Garamond",serif}
.form-status{margin:0;min-height:1.4em;font-weight:500}
.form-status.err{color:#c0392b}
.form-status.ok{color:var(--gold)}

/* Contact */
.contact{background:#0F1E3A;color:#F2F4F8}
.contact .section-lead{color:#B4BED1}
.contact-inner{display:grid;grid-template-columns:1fr 1.1fr;gap:48px;align-items:center}
.contact-cards{display:grid;gap:14px}
.c-card{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:22px 26px;border-radius:var(--radius);border:1px solid rgba(200,150,30,.35);text-decoration:none;transition:background .2s,transform .2s}
.c-card:hover{background:rgba(200,150,30,.12);transform:translateX(4px)}
.c-k{text-transform:uppercase;letter-spacing:.14em;font-size:.78rem;color:var(--gold-l);font-weight:700}
.c-v{font-family:"Cormorant Garamond",serif;font-size:1.6rem;font-weight:700}

/* FAQ */
.faq-wrap{max-width:860px}
.faq-list{margin-top:36px;display:grid;gap:12px}
.faq-list details{border:1px solid var(--line);border-radius:14px;background:var(--card);padding:0 22px}
.faq-list summary{cursor:pointer;list-style:none;padding:20px 0;font-weight:600;font-size:1.08rem;display:flex;justify-content:space-between;gap:16px}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary::after{content:"+";color:var(--gold);font-size:1.4rem;line-height:1;transition:transform .2s}
.faq-list details[open] summary::after{transform:rotate(45deg)}
.faq-list p{margin:0 0 20px;color:var(--muted)}
.faq-list a{color:var(--gold);font-weight:600}

/* Footer */
.site-footer{background:#0A1530;color:#B4BED1;padding:48px 0;border-top:1px solid #1E2E4D}
.footer-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px}
.footer-logo{height:80px;width:auto}
.footer-links{display:flex;flex-wrap:wrap;gap:20px}
.footer-links a{text-decoration:none}
.footer-links a:hover{color:var(--gold-l)}
.footer-meta{margin:0;font-size:.88rem;width:100%;text-align:center;border-top:1px solid #1E2E4D;padding-top:20px}

/* Responsive */
@media (max-width:980px){
  .nav{display:none}
  .header-tools{margin-left:auto}
  .svc-grid,.testi-grid{grid-template-columns:1fr}
  .qualities{grid-template-columns:1fr 1fr}
  .usp-inner,.contact-inner,.qf-cols{grid-template-columns:1fr}
}
@media (max-width:560px){
  .section{padding:68px 0}
  .hide-sm{display:none}
  .qualities,.row2,.surface-row{grid-template-columns:1fr}
  .brand img{height:48px}
  .quote-bar{padding:14px 16px}
  .quote-bar .btn{width:100%}
  .c-v{font-size:1.3rem}
}