/* Layout concept : un plan de chantier — trame de béton, lignes de cote orange,
   titres condensés comme sur un panneau de chantier. */
:root{
  --bg:#e6e7e4;          /* béton clair */
  --panel:#f4f4f2;       /* gâchée fraîche */
  --ink:#16191b;         /* acier noirci */
  --muted:#5a6064;       /* graphite */
  --rule:#c3c6c4;        /* trait de crayon */
  --accent:#d9521a;      /* orange chantier */
  --accent-ink:#ffffff;
  --grid:rgba(22,25,27,.055);
  --ok:#2f7d4f;

  --f-display:"Barlow Condensed","Arial Narrow","Roboto Condensed",sans-serif;
  --f-body:"Archivo","Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --f-mono:"IBM Plex Mono",ui-monospace,Consolas,monospace;

  --s-1:.875rem; --s0:1rem; --s1:1.25rem; --s2:1.6rem; --s3:2.25rem; --s4:clamp(2.6rem,6.5vw,5.4rem);
  --gutter:clamp(16px,4vw,48px);
  --max:1180px;
  color-scheme:light;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#141618; --panel:#1c1f22; --ink:#eceae6; --muted:#a2a7aa; --rule:#33383c;
    --accent:#ff6a2b; --accent-ink:#141618; --grid:rgba(236,234,230,.045); --ok:#5fbf86;
    color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --bg:#141618; --panel:#1c1f22; --ink:#eceae6; --muted:#a2a7aa; --rule:#33383c;
  --accent:#ff6a2b; --accent-ink:#141618; --grid:rgba(236,234,230,.045); --ok:#5fbf86;
  color-scheme:dark;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}
body{
  margin:0;background:var(--bg);color:var(--ink);font-family:var(--f-body);font-size:var(--s0);line-height:1.6;
  background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);
  background-size:32px 32px;
  padding-bottom:calc(72px + env(safe-area-inset-bottom,0px));
}
@media (min-width:860px){body{padding-bottom:0}}
img{max-width:100%;display:block}
a{color:inherit}
:focus-visible{outline:3px solid var(--accent);outline-offset:3px}
.wrap{max-width:var(--max);margin-inline:auto;padding-inline:var(--gutter)}
h1,h2,h3{font-family:var(--f-display);font-weight:800;line-height:.95;letter-spacing:.005em;text-transform:uppercase;text-wrap:balance;margin:0}
h2{font-size:var(--s3)}
h3{font-size:var(--s2)}
p{margin:0}
.mono{font-family:var(--f-mono);font-size:.78rem;letter-spacing:.06em;text-transform:uppercase}
.eyebrow{color:var(--accent);font-family:var(--f-mono);font-size:.78rem;letter-spacing:.12em;text-transform:uppercase}
.lead{color:var(--muted);max-width:60ch;font-size:1.05rem}

/* Boutons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.6rem;min-height:52px;padding:.8rem 1.4rem;
  font-family:var(--f-display);font-weight:700;font-size:1.15rem;letter-spacing:.04em;text-transform:uppercase;text-decoration:none;
  border:2px solid var(--ink);color:var(--ink);background:transparent;cursor:pointer;transition:transform .15s ease,background .15s ease,color .15s ease}
.btn:hover{transform:translateY(-2px)}
.btn--accent{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.btn--ink{background:var(--ink);border-color:var(--ink);color:var(--bg)}
.btn svg{width:20px;height:20px;flex:none}

/* En-tête */
.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;background:color-mix(in srgb,var(--bg) 88%,transparent);
  backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border-bottom:1px solid var(--rule)}
.top .wrap{display:flex;align-items:center;gap:1rem;min-height:68px}
.brand{display:flex;align-items:center;gap:.7rem;text-decoration:none;margin-right:auto}
.brand svg{width:34px;height:30px;flex:none}
.brand b{display:block;font-family:var(--f-display);font-weight:800;font-size:1.45rem;line-height:1;text-transform:none;letter-spacing:.01em}
.brand small{display:block;font-family:var(--f-mono);font-size:.62rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin-top:.15rem}
.nav{display:none;gap:1.6rem}
.nav a{text-decoration:none;font-weight:500;font-size:.95rem;color:var(--muted)}
.nav a:hover{color:var(--ink)}
.top-tel{display:none;font-family:var(--f-mono);font-weight:500;text-decoration:none}
@media (min-width:980px){.nav{display:flex}.top-tel{display:inline}}
.top .btn{min-height:44px;padding:.5rem 1rem;font-size:1rem}

/* Hero */
.hero{padding-block:clamp(2.5rem,7vw,5.5rem) clamp(2rem,5vw,4rem)}
.hero-grid{display:grid;gap:clamp(2rem,4vw,3.5rem);align-items:end}
@media (min-width:960px){.hero-grid{grid-template-columns:1.35fr .9fr}}
.hero h1{font-size:var(--s4)}
.hero h1 em{font-style:normal;color:var(--accent)}
/* Ligne de cote : signature du site */
.cote{display:flex;align-items:center;gap:.6rem;margin-block:1.4rem 1.6rem;color:var(--accent);max-width:34rem}
.cote::before,.cote::after{content:"";height:1px;flex:1;background:currentColor}
.cote span{font-family:var(--f-mono);font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;text-align:center;min-width:0}
.hero-grid>*{min-width:0}
.btn{white-space:nowrap}
@media (max-width:520px){.brand small{display:none}.top .btn{padding:.5rem .8rem;font-size:.95rem}.cote::before,.cote::after{flex:0 0 14px}}
.cote{position:relative}
.cote i{position:absolute;top:50%;width:1px;height:14px;background:currentColor;transform:translateY(-50%)}
.cote i:first-child{left:0}.cote i:last-of-type{right:0}
.hero .lead{margin-bottom:1.8rem}
.cta-row{display:flex;flex-wrap:wrap;gap:.8rem}
.proofs{display:flex;flex-wrap:wrap;gap:.5rem 1.4rem;margin-top:2rem;padding:0;list-style:none}
.proofs li{display:flex;align-items:center;gap:.5rem;font-size:.92rem;font-weight:500}
.proofs svg{width:18px;height:18px;color:var(--accent);flex:none}

/* Fiche chantier (carte d'info) */
.fiche{background:var(--panel);border:1px solid var(--rule);box-shadow:8px 8px 0 var(--ink);padding:1.4rem 1.4rem 1.2rem;min-width:0}
.fiche-head{display:flex;justify-content:space-between;align-items:baseline;border-bottom:2px solid var(--ink);padding-bottom:.6rem;margin-bottom:.4rem}
.fiche-head b{font-family:var(--f-display);font-size:1.5rem;text-transform:uppercase}
.fiche dl{margin:0;display:grid;grid-template-columns:auto 1fr;gap:0}
.fiche dt,.fiche dd{padding:.62rem 0;border-bottom:1px dashed var(--rule);margin:0}
.fiche dt{color:var(--muted);font-family:var(--f-mono);font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;padding-right:1rem;align-self:center}
.fiche dd{font-weight:600;text-align:right;font-variant-numeric:tabular-nums}
.fiche dd a{text-decoration:none}
.status{display:inline-flex;align-items:center;gap:.4rem}
.status::before{content:"";width:9px;height:9px;border-radius:50%;background:var(--muted)}
.status.is-open::before{background:var(--ok);box-shadow:0 0 0 4px color-mix(in srgb,var(--ok) 25%,transparent)}
.fiche .btn{width:100%;margin-top:1rem}

/* Montagnes */
.ridge{display:block;width:100%;height:auto;color:var(--ink);opacity:.9}

/* Sections */
section{scroll-margin-top:80px}
.sec{padding-block:clamp(3.5rem,8vw,6rem)}
.sec-head{display:grid;gap:1rem;margin-bottom:2.4rem}
@media (min-width:860px){.sec-head{grid-template-columns:1fr 1fr;align-items:end}}
.band{background:var(--ink);color:var(--bg)}
.band .lead{color:color-mix(in srgb,var(--bg) 70%,var(--ink))}

/* Savoir-faire */
.services{display:grid;gap:0;border-top:2px solid var(--ink)}
@media (min-width:760px){.services{grid-template-columns:repeat(2,1fr)}}
.svc{padding:1.8rem 0 2rem;border-bottom:1px solid var(--rule);display:grid;grid-template-columns:56px 1fr;gap:1rem;min-width:0}
@media (min-width:760px){.svc:nth-child(odd){padding-right:2.4rem;border-right:1px solid var(--rule)}.svc:nth-child(even){padding-left:2.4rem}}
.svc-ico{width:56px;height:56px;border:2px solid var(--ink);display:grid;place-items:center}
.svc-ico svg{width:30px;height:30px}
.svc h3{margin-bottom:.5rem}
.svc p{color:var(--muted);margin-bottom:.9rem}
.tags{display:flex;flex-wrap:wrap;gap:.4rem;padding:0;margin:0;list-style:none}
.tags li{font-size:.82rem;padding:.25rem .6rem;border:1px solid var(--rule);background:var(--panel)}

/* Étapes */
.steps{display:grid;gap:1px;background:color-mix(in srgb,var(--bg) 25%,var(--ink));counter-reset:step;padding:0;margin:0;list-style:none}
@media (min-width:860px){.steps{grid-template-columns:repeat(4,1fr)}}
.steps li{background:var(--ink);padding:1.6rem 1.4rem 1.8rem;counter-increment:step;min-width:0}
.steps li::before{content:"0" counter(step);display:block;font-family:var(--f-display);font-weight:800;font-size:3rem;line-height:1;color:var(--accent);margin-bottom:.8rem}
.steps h3{font-size:1.4rem;margin-bottom:.5rem}
.steps p{color:color-mix(in srgb,var(--bg) 72%,var(--ink));font-size:.95rem}

/* Préparateur de demande */
.devis{display:grid;gap:2.4rem}
@media (min-width:960px){.devis{grid-template-columns:.85fr 1.15fr}}
.devis-aside{display:grid;gap:1.2rem;align-content:start}
.contact-list{display:grid;gap:0;border-top:2px solid var(--ink)}
.contact-list a,.contact-list div{display:flex;justify-content:space-between;gap:1rem;padding:1rem 0;border-bottom:1px solid var(--rule);text-decoration:none;min-width:0}
.contact-list span{color:var(--muted);font-family:var(--f-mono);font-size:.74rem;letter-spacing:.08em;text-transform:uppercase}
.contact-list b{font-weight:600;text-align:right;overflow-wrap:anywhere}
form{background:var(--panel);border:1px solid var(--rule);padding:clamp(1.2rem,3vw,2rem);display:grid;gap:1.3rem;min-width:0}
fieldset{border:0;padding:0;margin:0;min-width:0}
legend,label{display:block;font-family:var(--f-mono);font-size:.74rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:.5rem}
.chips{display:flex;flex-wrap:wrap;gap:.5rem}
.chips input{position:absolute;opacity:0;pointer-events:none}
.chips label{margin:0;cursor:pointer;font-family:var(--f-body);font-size:.95rem;font-weight:500;letter-spacing:0;text-transform:none;color:var(--ink);
  padding:.55rem .9rem;border:1.5px solid var(--rule);background:var(--bg);transition:border-color .15s,background .15s}
.chips input:checked+label{border-color:var(--accent);background:color-mix(in srgb,var(--accent) 14%,var(--bg))}
.chips input:focus-visible+label{outline:3px solid var(--accent);outline-offset:2px}
.row2{display:grid;gap:1.3rem}
@media (min-width:620px){.row2{grid-template-columns:1fr 1fr}}
input[type=text],input[type=tel],select,textarea{width:100%;font:inherit;color:var(--ink);background:var(--bg);border:1.5px solid var(--rule);padding:.8rem .9rem;border-radius:0}
input:focus,select:focus,textarea:focus{border-color:var(--accent);outline:none}
textarea{min-height:120px;resize:vertical}
.send{display:grid;gap:.7rem}
@media (min-width:620px){.send{grid-template-columns:1fr 1fr}}
.hint{font-size:.85rem;color:var(--muted)}
.form-msg{font-weight:600;color:var(--ok)}
.form-err{font-weight:600;color:var(--accent)}

/* Zone */
.zone{display:grid;gap:2rem;align-items:center}
@media (min-width:860px){.zone{grid-template-columns:1fr 1.1fr}}
.towns{display:flex;flex-wrap:wrap;gap:.5rem;padding:0;margin:1.4rem 0 0;list-style:none}
.towns li{font-family:var(--f-display);font-weight:700;font-size:1.25rem;text-transform:uppercase;padding:.3rem .8rem;border:1.5px solid var(--ink)}
.towns li.home{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}

/* FAQ */
.faq{border-top:2px solid var(--ink)}
.faq details{border-bottom:1px solid var(--rule)}
.faq summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;gap:1rem;align-items:center;padding:1.2rem 0;
  font-family:var(--f-display);font-weight:700;font-size:1.35rem;text-transform:uppercase;line-height:1.1}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-family:var(--f-mono);font-size:1.4rem;color:var(--accent);transition:transform .2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{padding:0 0 1.3rem;color:var(--muted);max-width:68ch}

/* Pied de page */
footer{border-top:2px solid var(--ink);padding-block:2.4rem;font-size:.9rem;color:var(--muted)}
footer .wrap{display:flex;flex-wrap:wrap;gap:1rem 2rem;justify-content:space-between}
footer a{color:var(--ink)}

/* Barre d'action mobile */
.mbar{position:fixed;left:0;right:0;bottom:0;z-index:30;display:grid;grid-template-columns:1fr 1fr 1fr;
  background:var(--ink);padding-bottom:env(safe-area-inset-bottom,0px);border-top:1px solid var(--rule)}
.mbar a{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.2rem;min-height:64px;color:var(--bg);text-decoration:none;
  font-family:var(--f-display);font-weight:700;font-size:1rem;letter-spacing:.04em;text-transform:uppercase}
.mbar a svg{width:22px;height:22px}
.mbar a.main{background:var(--accent);color:var(--accent-ink)}
@media (min-width:860px){.mbar{display:none}}

/* Apparition douce du titre */
@keyframes rise{from{transform:translateY(14px);opacity:.001}to{transform:none;opacity:1}}
.hero h1 .ln{display:block;animation:rise .7s cubic-bezier(.2,.7,.2,1) both}
.hero h1 .ln:nth-child(2){animation-delay:.08s}.hero h1 .ln:nth-child(3){animation-delay:.16s}

/* Pages métier et guides */
.crumbs{font-family:var(--f-mono);font-size:.74rem;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);display:flex;flex-wrap:wrap;gap:.4rem}
.crumbs a{color:var(--muted)}
.page-hero{padding-block:clamp(2rem,6vw,4rem) clamp(1.5rem,4vw,2.5rem);border-bottom:2px solid var(--ink)}
.page-hero h1{font-size:clamp(2.3rem,6vw,4.2rem);margin-top:.8rem}
.page-grid{display:grid;gap:clamp(2rem,5vw,4rem);padding-block:clamp(2.5rem,6vw,4rem)}
@media (min-width:960px){.page-grid{grid-template-columns:minmax(0,1fr) 340px}}
.prose{max-width:68ch;min-width:0}
.prose h2{font-size:clamp(1.7rem,3.5vw,2.3rem);margin:2.4rem 0 .8rem}
.prose h2:first-child{margin-top:0}
.prose p{margin:0 0 1rem;color:var(--ink)}
.prose ul,.prose ol{margin:0 0 1.2rem;padding-left:1.2rem}
.prose li{margin-bottom:.45rem}
.prose li::marker{color:var(--accent)}
.prose strong{font-weight:600}
.note{border-left:4px solid var(--accent);background:var(--panel);padding:1rem 1.2rem;margin:1.4rem 0}
.side{display:grid;gap:1.2rem;align-content:start}
@media (min-width:960px){.side{position:sticky;top:96px}}
.side .fiche{box-shadow:6px 6px 0 var(--ink)}
.related{display:grid;gap:0;border-top:2px solid var(--ink)}
.related a{display:flex;justify-content:space-between;gap:1rem;padding:.85rem 0;border-bottom:1px solid var(--rule);text-decoration:none;font-weight:600}
.related a::after{content:"→";color:var(--accent)}
.svc h3 a{text-decoration:none}
.svc h3 a:hover{color:var(--accent)}
.more{display:inline-block;margin-top:.9rem;font-family:var(--f-mono);font-size:.78rem;letter-spacing:.08em;text-transform:uppercase;color:var(--accent);text-decoration:none}
.review{display:grid;gap:1.2rem;align-items:center;background:var(--panel);border:1px solid var(--rule);padding:clamp(1.4rem,3vw,2rem)}
@media (min-width:860px){.review{grid-template-columns:1fr auto}}
.review h2{font-size:clamp(1.7rem,3.5vw,2.3rem)}
.stars{display:flex;gap:.25rem;color:var(--accent)}
.stars svg{width:22px;height:22px}
.towns a{color:inherit;text-decoration:none}
.towns a:hover{color:var(--accent)}
.towns li.home a:hover{color:inherit}