/* =========================================================
   NLS CONSTRUCT — feuille de style
   Direction artistique « dessin technique »
   ========================================================= */

@font-face{font-family:"Archivo";src:url("../fonts/archivo-latin-600-normal.woff2") format("woff2");font-weight:600;font-style:normal;font-display:swap}
@font-face{font-family:"Archivo";src:url("../fonts/archivo-latin-700-normal.woff2") format("woff2");font-weight:700;font-style:normal;font-display:swap}
@font-face{font-family:"Source Sans 3";src:url("../fonts/source-sans-3-latin-400-normal.woff2") format("woff2");font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:"Source Sans 3";src:url("../fonts/source-sans-3-latin-600-normal.woff2") format("woff2");font-weight:600;font-style:normal;font-display:swap}

:root{
  --blue:#1F6FC5; --blue-dark:#17589E; --sky:#A9D2F3; --sky-soft:#E6F1FB;
  --slate:#1E2B33; --slate-2:#2B3B45; --ink:#1E2B33; --muted:#52626C;
  --concrete:#F3F4F1; --joint:#D6DADC; --white:#FFFFFF;
  --copper:#B4602A; --green:#2E7D5B; --green-soft:#E3F1EA;
  --radius:6px; --shadow:0 1px 2px rgba(30,43,51,.06),0 6px 20px rgba(30,43,51,.06);
  --font-title:"Archivo",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-body:"Source Sans 3",system-ui,-apple-system,"Segoe UI",sans-serif;
  --wrap:1200px; --gutter:20px;
  --grid:linear-gradient(rgba(169,210,243,.10) 1px,transparent 1px),linear-gradient(90deg,rgba(169,210,243,.10) 1px,transparent 1px);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:90px}
body{margin:0;font-family:var(--font-body);font-size:17px;line-height:1.6;color:var(--ink);background:var(--white);text-rendering:optimizeLegibility}
@media (min-width:1024px){body{font-size:18px}}
img,svg{max-width:100%;height:auto;display:block}
a{color:var(--blue);text-underline-offset:3px}
a:hover{color:var(--blue-dark)}
:focus-visible{outline:3px solid var(--copper);outline-offset:2px;border-radius:2px}
h1,h2,h3,h4{font-family:var(--font-title);line-height:1.2;color:var(--slate);margin:0 0 .6em;letter-spacing:-.01em}
h1{font-size:clamp(1.85rem,4.2vw,2.6rem);font-weight:700}
h2{font-size:clamp(1.5rem,3vw,1.95rem);font-weight:700}
h3{font-size:1.2rem;font-weight:600}
p{margin:0 0 1em}
ul{padding-left:1.2em}
address{font-style:normal}
.sr{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:-999px;top:8px;background:var(--slate);color:#fff;padding:10px 16px;z-index:100;border-radius:var(--radius)}
.skip:focus{left:8px}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 var(--gutter)}
.ic{width:20px;height:20px;flex:none}

/* ---------- Boutons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:12px 22px;border-radius:var(--radius);font-family:var(--font-title);font-weight:600;font-size:1rem;text-decoration:none;border:2px solid transparent;transition:background .15s,color .15s,border-color .15s;cursor:pointer;line-height:1.2;text-align:center}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:var(--blue-dark);color:#fff}
.btn-outline{border-color:var(--blue);color:var(--blue);background:transparent}
.btn-outline:hover{background:var(--sky-soft)}
.btn-ghost-light{border-color:rgba(255,255,255,.55);color:#fff;background:transparent}
.btn-ghost-light:hover{border-color:#fff;color:#fff;background:rgba(255,255,255,.08)}
.btn-lg{min-height:54px;padding:14px 26px;font-size:1.05rem}

/* ---------- En-tête ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.97);backdrop-filter:saturate(180%) blur(8px);border-bottom:1px solid var(--joint)}
.header-in{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:72px}
.brand img{height:48px;width:auto}
.nav-toggle{display:inline-flex;align-items:center;justify-content:center;width:48px;height:48px;border:1px solid var(--joint);background:#fff;border-radius:var(--radius);cursor:pointer}
.nav-toggle-bar,.nav-toggle-bar::before,.nav-toggle-bar::after{display:block;width:22px;height:2px;background:var(--slate);position:relative;transition:transform .2s}
.nav-toggle-bar::before,.nav-toggle-bar::after{content:"";position:absolute;left:0}
.nav-toggle-bar::before{top:-7px}.nav-toggle-bar::after{top:7px}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar::before{transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar::after{transform:translateY(-7px) rotate(-45deg)}
.nav{display:none;position:fixed;inset:72px 0 0 0;background:#fff;overflow-y:auto;padding:16px var(--gutter) 120px;border-top:1px solid var(--joint)}
.nav.open{display:block}
.nav-list{list-style:none;margin:0;padding:0}
.nav-list>li>a{display:block;padding:14px 0;font-family:var(--font-title);font-weight:600;font-size:1.1rem;color:var(--slate);text-decoration:none;border-bottom:1px solid var(--concrete)}
.sub ul{list-style:none;padding:0;margin:0 0 8px}
.sub a{display:block;padding:10px 0 10px 14px;color:var(--muted);text-decoration:none;font-size:1rem}
.sub-title{margin:10px 0 0 14px;font-family:var(--font-title);font-size:.78rem;letter-spacing:.08em;text-transform:uppercase;color:var(--copper);font-weight:600}
.nav-cta{display:flex;flex-direction:column;gap:12px;margin-top:20px}
.nav-tel{display:inline-flex;align-items:center;gap:8px;font-weight:600;color:var(--slate);text-decoration:none;min-height:48px}

@media (min-width:1100px){
  .nav-toggle{display:none}
  .nav{display:flex!important;position:static;padding:0;border:0;overflow:visible;align-items:center;gap:28px;background:transparent}
  .nav-list{display:flex;gap:4px}
  .nav-list>li{position:relative}
  .nav-list>li>a{border:0;padding:24px 12px;font-size:1rem}
  .nav-list>li>a:hover{color:var(--blue)}
  .has-sub>a::after{content:"";display:inline-block;width:6px;height:6px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:rotate(45deg);margin:0 0 3px 8px}
  .sub{position:absolute;top:100%;left:0;min-width:260px;background:#fff;border:1px solid var(--joint);border-radius:var(--radius);box-shadow:var(--shadow);padding:12px 8px;opacity:0;visibility:hidden;transform:translateY(6px);transition:opacity .15s,transform .15s,visibility .15s}
  .sub-wide{display:grid;grid-template-columns:repeat(3,minmax(200px,1fr));gap:8px;min-width:680px}
  .has-sub:hover .sub,.has-sub:focus-within .sub{opacity:1;visibility:visible;transform:none}
  .sub a{padding:8px 12px;border-radius:4px;color:var(--ink)}
  .sub a:hover{background:var(--concrete);color:var(--blue)}
  .sub-title{margin:6px 12px 4px}
  .nav-cta{flex-direction:row;align-items:center;margin:0;gap:18px}
  .nav-tel{font-size:.98rem}
}

/* ---------- Fil d'Ariane ---------- */
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px;padding:16px 0 0;margin:0 auto;font-size:.9rem;color:var(--muted)}
.crumbs li+li::before{content:"/";margin-right:6px;color:var(--joint)}
.crumbs a{color:var(--muted)}

/* ---------- Sections ---------- */
.section{padding:64px 0}
.section-alt{background:var(--concrete)}
.section-head{max-width:760px;margin-bottom:36px}
.kicker{display:inline-block;font-family:var(--font-title);font-size:.8rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--copper);margin-bottom:10px}
.lead{font-size:1.15rem;color:var(--muted)}
@media (min-width:1024px){.section{padding:88px 0}}

/* ---------- Hero ---------- */
.hero{background:var(--slate);background-image:var(--grid);background-size:24px 24px;color:#fff;padding:48px 0 56px;overflow:hidden}
.hero-in{display:grid;gap:40px;align-items:center}
.hero h1{color:#fff}
.hero .lead{color:#D5DEE4}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:28px 0}
.hero-badges{list-style:none;padding:0;margin:0;display:grid;gap:10px}
.hero-badges li{display:flex;align-items:center;gap:10px;color:#E8EEF2;font-size:.98rem}
.hero-badges .ic{color:var(--sky)}
.hero-visual{background:rgba(255,255,255,.03);border:1px solid rgba(169,210,243,.25);border-radius:8px;padding:12px}
.hero-visual figcaption{font-size:.88rem;color:#B9C6CF;padding:8px 6px 2px;font-style:italic}
@media (min-width:960px){.hero{padding:72px 0 80px}.hero-in{grid-template-columns:1.05fr .95fr}}

.page-hero{background:var(--slate);background-image:var(--grid);background-size:24px 24px;color:#fff;padding:40px 0 48px}
.page-hero h1{color:#fff;max-width:900px}
.page-hero .lead{color:#D5DEE4;max-width:820px}
.page-hero .hero-actions{margin-bottom:0}
.page-hero .kicker{color:#E7A877}
.crumbs-dark{background:var(--slate)}
.crumbs-dark ol{color:#B9C6CF}.crumbs-dark a{color:#D5DEE4}

/* ---------- Schéma ---------- */
.schema{width:100%;height:auto;font-family:var(--font-body)}
.schema .sch-concrete{stroke:#9FB2BE;stroke-width:1.2}
.schema .sch-hatch{stroke:#5F7480;stroke-width:1}
.schema .sch-insul{stroke:#E7A877;stroke-width:1;fill-opacity:1}
.schema .sch-wool{fill:none;stroke:#E7A877;stroke-width:1}
.schema .sch-gravel circle{fill:#7C8F9A}
.schema .sch-membrane{fill:none;stroke:var(--sky);stroke-width:4;stroke-linecap:round}
.schema .sch-clad{fill:#3A4D59;stroke:#9FB2BE;stroke-width:1}
.schema .sch-thin{stroke:#9FB2BE;stroke-width:1;stroke-dasharray:3 3}
.schema .sch-cap{fill:none;stroke:#DDE5EA;stroke-width:3;stroke-linejoin:round}
.schema .sch-room{fill:#7C8F9A;font-size:13px;font-style:italic}
.schema .sch-dim line{stroke:#E7A877;stroke-width:1.2}
.schema .sch-dim text{fill:#E7A877;font-size:13px;font-weight:600}
.schema .sch-labels line{stroke:#B9C6CF;stroke-width:1}
.schema .sch-labels text{fill:#E8EEF2;font-size:13.5px}

/* ---------- Cartes ---------- */
.grid{display:grid;gap:20px}
@media (min-width:640px){.grid-2{grid-template-columns:repeat(2,1fr)}.grid-4{grid-template-columns:repeat(2,1fr)}}
@media (min-width:960px){.grid-3{grid-template-columns:repeat(3,1fr)}.grid-4{grid-template-columns:repeat(4,1fr)}}
.card{background:#fff;border:1px solid var(--joint);border-radius:var(--radius);padding:24px;display:flex;flex-direction:column;gap:6px}
.card h3{margin-bottom:4px}
.card p{color:var(--muted);margin:0}
.card-link{text-decoration:none;color:inherit;transition:border-color .15s,box-shadow .15s,transform .15s}
.card-link:hover{border-color:var(--blue);box-shadow:var(--shadow);transform:translateY(-2px);color:inherit}
.card-kicker{font-family:var(--font-title);font-size:.75rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--copper)}
.card-more{margin-top:auto;padding-top:14px;display:inline-flex;align-items:center;gap:6px;font-family:var(--font-title);font-weight:600;color:var(--blue);font-size:.95rem}
.card-more .ic{width:18px;height:18px}
.card-icon{width:44px;height:44px;border-radius:8px;background:var(--sky-soft);color:var(--blue);display:flex;align-items:center;justify-content:center;margin-bottom:10px}
.card-icon .ic{width:24px;height:24px}

.pole{background:#fff;border:1px solid var(--joint);border-top:3px solid var(--blue);border-radius:var(--radius);padding:28px}
.pole h3{font-size:1.45rem}
.pole p{color:var(--muted)}
.pole ul{list-style:none;padding:0;margin:16px 0 0}
.pole li{border-top:1px solid var(--concrete)}
.pole li a{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:12px 0;text-decoration:none;color:var(--ink);font-weight:600}
.pole li a:hover{color:var(--blue)}
.pole li .ic{width:18px;height:18px;color:var(--blue)}

/* ---------- Méthode ---------- */
.steps{list-style:none;padding:0;margin:0;display:grid;gap:20px;counter-reset:s}
@media (min-width:800px){.steps{grid-template-columns:repeat(4,1fr)}}
.steps li{counter-increment:s;position:relative;padding:22px;background:#fff;border:1px solid var(--joint);border-radius:var(--radius)}
.steps li::before{content:counter(s,decimal-leading-zero);display:block;font-family:var(--font-title);font-weight:700;font-size:1.6rem;color:var(--copper);margin-bottom:6px}
.steps h3{font-size:1.08rem}
.steps p{margin:0;color:var(--muted);font-size:.98rem}

/* ---------- Bandeau de confiance ---------- */
.trust{display:grid;gap:16px}
@media (min-width:800px){.trust{grid-template-columns:repeat(3,1fr)}}
.trust-item{display:flex;gap:14px;align-items:flex-start;padding:22px;background:#fff;border:1px solid var(--joint);border-radius:var(--radius)}
.trust-item .ic{width:28px;height:28px;color:var(--green);margin-top:2px}
.trust-item strong{display:block;font-family:var(--font-title);color:var(--slate);font-size:1.05rem}
.trust-item span{color:var(--muted);font-size:.97rem}

.badge{display:inline-block;padding:4px 10px;border-radius:999px;font-size:.82rem;font-weight:600;border:1px solid var(--joint);color:var(--slate);background:#fff;font-family:var(--font-title)}
.badge-rge{background:var(--green-soft);border-color:#B9DBCB;color:var(--green)}

/* ---------- Bloc qualification ---------- */
.qualif{display:grid;gap:28px;align-items:center;background:#fff;border:1px solid var(--joint);border-left:4px solid var(--green);border-radius:var(--radius);padding:28px}
@media (min-width:900px){.qualif{grid-template-columns:auto 1fr auto}}
.qualif-seal{width:96px;height:96px;border-radius:50%;border:2px solid var(--green);display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--green);font-family:var(--font-title);font-weight:700;line-height:1.1;text-align:center}
.qualif-seal small{font-size:.7rem;letter-spacing:.08em}
.qualif-seal b{font-size:1.4rem}
.qualif h2{font-size:1.4rem;margin-bottom:6px}
.qualif p{margin:0;color:var(--muted)}

/* ---------- Contenu de page ---------- */
.content-grid{display:grid;gap:40px}
@media (min-width:1000px){.content-grid{grid-template-columns:minmax(0,1fr) 340px}}
.prose{max-width:760px}
.prose h2{margin-top:1.6em}
.prose h2:first-child{margin-top:0}
.checklist{list-style:none;padding:0;margin:0 0 1.2em;display:grid;gap:10px}
.checklist li{display:flex;gap:10px;align-items:flex-start}
.checklist .ic{color:var(--green);margin-top:3px}
.mission{display:grid;gap:14px;margin:0 0 1.2em}
@media (min-width:700px){.mission{grid-template-columns:repeat(2,1fr)}}
.mission div{padding:18px;border:1px solid var(--joint);border-radius:var(--radius);background:#fff}
.mission h3{font-size:1.05rem;margin-bottom:4px}
.mission p{margin:0;color:var(--muted);font-size:.98rem}
.aside-box{position:sticky;top:96px;background:var(--concrete);border:1px solid var(--joint);border-radius:var(--radius);padding:24px}
.aside-box h2{font-size:1.2rem}
.aside-box ul{list-style:none;padding:0;margin:0 0 18px;display:grid;gap:8px;font-size:.98rem}
.aside-box .btn{width:100%;margin-top:8px}
.note{background:var(--sky-soft);border-left:4px solid var(--blue);padding:16px 18px;border-radius:4px;margin:0 0 1.2em}
.note p:last-child{margin:0}

/* ---------- FAQ ---------- */
.faq{display:grid;gap:10px}
.faq details{background:#fff;border:1px solid var(--joint);border-radius:var(--radius)}
.faq summary{cursor:pointer;list-style:none;padding:18px 48px 18px 20px;font-family:var(--font-title);font-weight:600;color:var(--slate);position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);font-size:1.4rem;color:var(--blue)}
.faq details[open] summary::after{content:"–"}
.faq details p{padding:0 20px 18px;margin:0;color:var(--muted)}

/* ---------- Bandeau CTA ---------- */
.cta-band{background:var(--slate);background-image:var(--grid);background-size:24px 24px;color:#fff;padding:56px 0}
.cta-band-in{display:grid;gap:24px;align-items:center}
.cta-band h2{color:#fff}
.cta-band p{color:#D5DEE4;margin:0;max-width:640px}
.cta-band-actions{display:flex;flex-wrap:wrap;gap:12px}
@media (min-width:960px){.cta-band-in{grid-template-columns:1fr auto}}

/* ---------- Réalisations ---------- */
.real-card{overflow:hidden;padding:0}
.real-card img{aspect-ratio:3/2;object-fit:cover;width:100%}
.real-card .real-body{padding:20px}
.real-meta{font-size:.88rem;color:var(--muted)}
.empty{background:#fff;border:1px dashed var(--joint);border-radius:var(--radius);padding:32px;text-align:center}

/* ---------- Formulaire ---------- */
.form{display:grid;gap:18px}
@media (min-width:700px){.form .row-2{display:grid;grid-template-columns:1fr 1fr;gap:18px}}
.field{display:flex;flex-direction:column;gap:6px}
.field label{font-weight:600;font-size:.97rem}
.field .opt{font-weight:400;color:var(--muted)}
.field input,.field select,.field textarea{font:inherit;font-size:1rem;padding:12px 14px;border:1px solid #B7C0C5;border-radius:var(--radius);background:#fff;color:var(--ink);min-height:48px;width:100%}
.field textarea{min-height:160px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(31,111,197,.18)}
.field .err{color:#B42318;font-size:.9rem}
.field.has-err input,.field.has-err select,.field.has-err textarea{border-color:#B42318}
.hp{position:absolute;left:-5000px}
.consent{font-size:.9rem;color:var(--muted)}
.alert{padding:16px 18px;border-radius:var(--radius);margin-bottom:20px}
.alert-ok{background:var(--green-soft);border:1px solid #B9DBCB;color:#1D5B41}
.alert-err{background:#FDECEA;border:1px solid #F5C2BE;color:#8A1C12}
.contact-grid{display:grid;gap:36px}
@media (min-width:960px){.contact-grid{grid-template-columns:1.4fr .9fr}}
.contact-list{list-style:none;padding:0;margin:0;display:grid;gap:18px}
.contact-list li{display:flex;gap:12px}
.contact-list .ic{color:var(--blue);margin-top:4px}
.after-steps{counter-reset:a;list-style:none;padding:0;margin:0;display:grid;gap:12px}
.after-steps li{counter-increment:a;display:flex;gap:12px;align-items:flex-start}
.after-steps li::before{content:counter(a);flex:none;width:28px;height:28px;border-radius:50%;background:var(--copper);color:#fff;font-weight:700;display:flex;align-items:center;justify-content:center;font-size:.9rem;font-family:var(--font-title)}

/* ---------- Article ---------- */
.article-meta{color:#B9C6CF;font-size:.95rem}
.article-list{display:grid;gap:20px}

/* ---------- Pied de page ---------- */
.site-footer{background:#162027;color:#C9D3D9;padding:56px 0 100px;font-size:.97rem}
.site-footer a{color:#E8EEF2;text-decoration:none}
.site-footer a:hover{color:#fff;text-decoration:underline}
.footer-grid{display:grid;gap:32px}
@media (min-width:800px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr}}
.footer-name{font-family:var(--font-title);font-weight:700;color:#fff;font-size:1.2rem;margin-bottom:8px}
.footer-title{font-family:var(--font-title);font-weight:600;color:#fff;margin-bottom:10px;font-size:.92rem;letter-spacing:.06em;text-transform:uppercase}
.footer-title-2{margin-top:20px}
.site-footer ul{list-style:none;padding:0;margin:0;display:grid;gap:6px}
.footer-badges{display:flex;flex-wrap:wrap;gap:8px}
.footer-badges .badge{background:transparent;color:#E8EEF2;border-color:#3A4D59}
.footer-badges .badge-rge{color:#9FD6BC;border-color:#2E7D5B}
.footer-note{color:#9FB2BE;font-size:.9rem;margin-top:10px}
.footer-legal{border-top:1px solid #2B3B45;margin-top:40px;padding-top:20px;font-size:.86rem;color:#9FB2BE}
.footer-legal p{margin:0 0 6px}
@media (min-width:1100px){.site-footer{padding-bottom:40px}}

/* ---------- Barre mobile ---------- */
.mobile-bar{position:fixed;left:0;right:0;bottom:0;z-index:60;display:grid;grid-template-columns:1fr 1.6fr;gap:8px;padding:10px 12px calc(10px + env(safe-area-inset-bottom));background:#fff;border-top:1px solid var(--joint);box-shadow:0 -4px 16px rgba(30,43,51,.08)}
.mobile-bar a{min-height:48px;display:flex;align-items:center;justify-content:center;gap:8px;border-radius:var(--radius);font-family:var(--font-title);font-weight:600;text-decoration:none}
.mobile-bar-call{border:2px solid var(--blue);color:var(--blue)}
.mobile-bar-quote{background:var(--blue);color:#fff}
@media (min-width:1100px){.mobile-bar{display:none}}

/* ---------- Tableaux ---------- */
.table-wrap{overflow-x:auto}
table{border-collapse:collapse;width:100%;font-size:.97rem}
th,td{border-bottom:1px solid var(--joint);padding:12px 10px;text-align:left;vertical-align:top}
th{font-family:var(--font-title);font-weight:600;color:var(--slate);background:var(--concrete)}

@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
@media print{.site-header,.mobile-bar,.cta-band,.site-footer{display:none}}

/* Correctifs */
.aside-box ul li{display:flex;gap:10px;align-items:flex-start}
.aside-box ul li .ic{margin-top:3px;color:var(--blue)}
.brand img{height:56px}