/* Maquette OKTOX « Ligne & Réseau »
   Idée de mise en page : bandes pleine largeur qui alternent béton clair et bleu nuit du logo ;
   les activités sont un index en lignes (pas une grille de cartes) ; la méthode est dessinée
   comme une ligne aérienne portée par quatre appuis ; le code couleur des 12 fibres sert de filet. */
:root{
  --navy:#0A1A33;        /* fond du logo */
  --navy-2:#12294B;
  --navy-3:#1C3A63;
  --teal:#00B5B0;        /* anneau du logo, côté gauche */
  --green:#00C566;       /* anneau du logo, côté droit */
  --green-ink:#036B41;   /* vert lisible sur fond clair */
  --beton:#F1F3F2;       /* béton clair */
  --paper:#FFFFFF;
  --ink:#0E1B2C;
  --muted:#55627A;
  --line:#D9DFE5;
  --on-navy:#C5D1E2;
  --grad:linear-gradient(90deg,var(--teal),var(--green));
  --font-h:"Archivo","Arial Narrow",system-ui,sans-serif;
  --font-b:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-m:"IBM Plex Mono",ui-monospace,Consolas,monospace;
  --r:10px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font-b);color:var(--ink);background:var(--beton);line-height:1.6;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
:focus-visible{outline:3px solid var(--green);outline-offset:3px}
h1,h2,h3{font-family:var(--font-h);font-stretch:112%;font-weight:800;line-height:1.08;letter-spacing:-.015em;text-wrap:balance}
.wrap{width:min(1200px,100% - 40px);margin-inline:auto}
.band{padding-block:104px}
.label{font-family:var(--font-m);font-size:.78rem;letter-spacing:.14em;text-transform:uppercase;color:var(--green-ink)}
.on-navy .label{color:var(--green)}
.h2{font-size:clamp(1.9rem,3.6vw,2.9rem);margin-top:14px}
.lead{color:var(--muted);font-size:1.08rem;max-width:60ch;margin-top:18px}
.on-navy{background:var(--navy);color:#fff}
.on-navy .lead,.on-navy .axe p{color:var(--on-navy)}
.band{--rule:var(--line)}
.on-navy{--rule:rgba(255,255,255,.18)}
.paper{background:var(--paper)}

.btn{display:inline-flex;align-items:center;gap:10px;padding:15px 24px;border-radius:var(--r);font-weight:600;font-size:1rem;border:2px solid transparent;cursor:pointer;transition:transform .2s,box-shadow .2s,background .2s;white-space:nowrap}
.btn::after{content:"→";transition:transform .2s}
.btn:hover::after{transform:translateX(4px)}
.btn-go{background:var(--grad);color:var(--navy)}
.btn-go:hover{transform:translateY(-2px);box-shadow:0 14px 28px -14px rgba(0,197,102,.9)}
.btn-line{border-color:rgba(255,255,255,.4);color:#fff}
.btn-line:hover{background:rgba(255,255,255,.1)}
.btn-navy{background:var(--navy);color:#fff}
.btn-navy:hover{background:var(--navy-2);transform:translateY(-2px)}
.btn-ghost{border-color:var(--navy);color:var(--navy)}
.btn-ghost:hover{background:var(--navy);color:#fff}

/* filet : code couleur des 12 fibres (ordre français) */
.fibres{display:flex;height:5px}
.fibres i{flex:1}
.fibres i:nth-child(1){background:#E0322B}.fibres i:nth-child(2){background:#1F6FD0}
.fibres i:nth-child(3){background:#1FA24A}.fibres i:nth-child(4){background:#F4D21F}
.fibres i:nth-child(5){background:#7B3FB5}.fibres i:nth-child(6){background:#F5F5F0}
.fibres i:nth-child(7){background:#F08A1C}.fibres i:nth-child(8){background:#8C949C}
.fibres i:nth-child(9){background:#7A4A22}.fibres i:nth-child(10){background:#111418}
.fibres i:nth-child(11){background:#19B9C4}.fibres i:nth-child(12){background:#EE7FB0}

/* ===== barre haute + en-tête ===== */
.topbar{background:var(--navy);color:var(--on-navy);font-size:.85rem}
.topbar .wrap{display:flex;justify-content:space-between;gap:8px 24px;flex-wrap:wrap;padding-block:8px}
.topbar a:hover{color:#fff}
header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.93);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:24px;height:76px}
.logo{display:flex;align-items:center;gap:12px;font-family:var(--font-h);font-stretch:125%;font-weight:900;font-size:1.45rem;letter-spacing:.02em;color:var(--navy)}
.logo img{width:42px;height:42px;border-radius:10px}
.menu{display:flex;align-items:center;gap:2px}
.menu>li{position:relative}
.menu>li>a{display:block;padding:10px 13px;border-radius:8px;font-weight:500;font-size:.96rem;white-space:nowrap}
.menu>li>a:hover{background:var(--beton)}
.has-sub>a::after{content:"▾";font-size:.7rem;margin-left:6px;opacity:.6}
.sub{position:absolute;top:100%;left:0;min-width:270px;background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:8px;box-shadow:0 18px 40px -20px rgba(10,26,51,.45);opacity:0;visibility:hidden;transform:translateY(6px);transition:.18s}
.has-sub:hover .sub,.has-sub:focus-within .sub{opacity:1;visibility:visible;transform:none}
.sub a{display:block;padding:9px 12px;border-radius:6px;font-size:.94rem}
.sub a:hover{background:var(--beton)}
.nav .btn{padding:11px 18px;font-size:.94rem}
.burger{display:none;background:none;border:0;width:44px;height:44px;cursor:pointer}
.burger span{display:block;width:24px;height:2px;background:var(--navy);margin:5px auto}

/* ===== ouverture ===== */
.hero{position:relative;color:#fff;background:var(--navy);overflow:hidden}
.hero-bg{position:absolute;inset:0}
.hero-bg img{width:100%;height:100%;object-fit:cover;object-position:70% 45%}
.hero-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(95deg,rgba(10,26,51,.96) 0%,rgba(10,26,51,.88) 42%,rgba(10,26,51,.45) 72%,rgba(10,26,51,.25) 100%)}
.hero .wrap{position:relative;display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,.75fr);gap:56px;align-items:end;padding-block:112px 96px}
.hero .label{color:var(--green)}
.hero h1{font-size:clamp(2.4rem,5.4vw,4.3rem);margin-top:20px}
.hero h1 em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{font-size:1.14rem;color:#DCE4F0;max-width:56ch;margin-top:24px}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.fiche{background:rgba(10,26,51,.72);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.16);border-radius:var(--r);padding:26px}
.fiche h2{font-family:var(--font-m);font-stretch:100%;font-weight:500;font-size:.78rem;letter-spacing:.14em;text-transform:uppercase;color:var(--green)}
.fiche li{display:flex;gap:14px;align-items:baseline;padding-block:13px;border-top:1px solid rgba(255,255,255,.14)}
.fiche li:first-child{border-top:0;margin-top:8px}
.fiche b{font-family:var(--font-h);font-stretch:112%;font-weight:700;font-size:1.02rem;min-width:9.5em}
.fiche span{color:var(--on-navy);font-size:.93rem}

/* ===== activités : index en lignes ===== */
.acts .wrap{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.6fr);gap:64px;align-items:start}
.acts-head{position:sticky;top:120px}
.rows{border-top:2px solid var(--navy)}
.row{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.15fr) 44px;gap:28px;align-items:center;padding:26px 8px;border-bottom:1px solid var(--line);transition:background .2s,padding .2s}
.row h3{font-size:1.32rem}
.row p{color:var(--muted);font-size:.98rem}
.row small{display:block;margin-top:8px;font-family:var(--font-m);font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:var(--green-ink)}
.row .go{width:44px;height:44px;border-radius:50%;border:1.5px solid var(--navy);display:grid;place-items:center;font-size:1.1rem;transition:.2s}
.row:hover{background:var(--paper);padding-inline:20px}
.row:hover .go{background:var(--grad);border-color:transparent}

/* ===== terrain ===== */
.terrain-head{display:flex;justify-content:space-between;align-items:end;gap:32px;flex-wrap:wrap}
.trio{display:grid;grid-template-columns:1.25fr 1fr 1fr;gap:20px;margin-top:52px}
.shot{position:relative;border-radius:var(--r);overflow:hidden;background:var(--navy-2)}
.shot img{width:100%;height:100%;min-height:380px;object-fit:cover;transition:transform .6s}
.shot:hover img{transform:scale(1.04)}
.shot figcaption{position:absolute;inset:auto 0 0 0;padding:70px 22px 20px;background:linear-gradient(transparent,rgba(10,26,51,.94))}
.shot h3{font-size:1.2rem}
.shot p{color:var(--on-navy);font-size:.93rem;margin-top:6px}

/* ===== méthode : la ligne et ses quatre appuis ===== */
.ligne{margin-top:56px}
.ligne svg{display:block;width:100%;height:120px}
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr))}
.step{padding:22px 18px 0;text-align:center}
.step .n{font-family:var(--font-m);font-size:.78rem;letter-spacing:.14em;color:var(--green-ink)}
.step h3{font-size:1.14rem;margin-top:8px}
.step p{color:var(--muted);font-size:.95rem;margin-top:8px}

/* ===== photovoltaïque ===== */
.pv{background:var(--paper)}
.pv .wrap{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);gap:64px;align-items:center}
.pv-imgs{display:grid;grid-template-columns:1.3fr 1fr;gap:16px}
.pv-imgs img{border-radius:var(--r);width:100%;height:360px;object-fit:cover}
.pv-imgs img:last-child{margin-top:44px}
.pv-list{margin-top:26px;display:flex;flex-wrap:wrap;gap:10px}
.pv-list li{font-family:var(--font-m);font-size:.75rem;letter-spacing:.1em;text-transform:uppercase;border:1.5px solid var(--navy);border-radius:6px;padding:7px 11px}
.pair{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}

/* ===== OKTOX Digital ===== */
.axes{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));margin-top:52px;border-top:1px solid var(--rule)}
.axe{padding:30px 30px 6px 0;border-right:1px solid var(--rule)}
.axe+.axe{padding-left:30px}
.axe:last-child{border-right:0;padding-right:0}
.axe h3{font-size:1.25rem}
.axe p{color:var(--muted);font-size:.98rem;margin-top:12px}
.digital .pair{margin-top:44px}

/* ===== appel ===== */
.appel{background:var(--beton);padding-block:104px}
.appel-in{background:var(--grad);color:var(--navy);border-radius:var(--r);padding:56px;display:grid;grid-template-columns:minmax(0,1.3fr) auto;gap:40px;align-items:center}
.appel h2{font-size:clamp(1.7rem,3vw,2.4rem)}
.appel p{margin-top:12px;max-width:54ch;font-size:1.05rem}
.appel-side{display:flex;flex-direction:column;gap:12px;align-items:stretch}
.mail{font-family:var(--font-m);font-size:.95rem;text-align:center;background:rgba(255,255,255,.55);border-radius:var(--r);padding:13px 18px;user-select:all}

/* ===== pied ===== */
footer{background:var(--navy);color:var(--on-navy);font-size:.95rem}
.foot{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:48px;padding-block:72px 48px}
footer .logo{color:#fff}
.foot p{margin-top:16px;max-width:34ch}
.foot h2{font-family:var(--font-m);font-stretch:100%;font-weight:500;font-size:.76rem;letter-spacing:.14em;text-transform:uppercase;color:var(--green);margin-bottom:16px}
.foot li{margin-top:9px}
.foot a:hover{color:#fff}
.foot-end{border-top:1px solid rgba(255,255,255,.14);padding-block:22px;display:flex;justify-content:space-between;gap:10px 24px;flex-wrap:wrap;font-size:.86rem}
.foot-end .code{font-family:var(--font-m);font-size:.72rem;letter-spacing:.06em}

/* ===== petits écrans ===== */
@media (max-width:1020px){
  .burger{display:block}
  .nav .btn{display:none}
  .menu{display:none;position:absolute;top:100%;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;background:var(--paper);border-bottom:1px solid var(--line);padding:10px 20px 20px;max-height:calc(100vh - 80px);overflow:auto}
  .menu.open{display:flex}
  .menu>li>a{padding:13px 4px;font-size:1.02rem}
  .sub{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:0;padding:0 0 8px 14px;min-width:0}
  .hero .wrap,.acts .wrap,.pv .wrap{grid-template-columns:minmax(0,1fr);gap:40px}
  .acts-head{position:static}
  .hero .wrap{padding-block:72px 64px}
  .hero-bg::after{background:linear-gradient(180deg,rgba(10,26,51,.9) 0%,rgba(10,26,51,.84) 60%,rgba(10,26,51,.94) 100%)}
  .band{padding-block:72px}
  .appel{padding-block:72px}
  .trio{grid-template-columns:1fr 1fr}
  .trio .shot:first-child{grid-column:1/-1}
  .axes{grid-template-columns:1fr}
  .axe,.axe+.axe{padding:26px 0 22px;border-right:0;border-bottom:1px solid var(--rule)}
  .foot{grid-template-columns:1fr 1fr}
  .appel-in{grid-template-columns:1fr;padding:40px 28px}
}
@media (max-width:700px){
  .row{grid-template-columns:minmax(0,1fr) 44px;gap:8px 16px}
  .row p{grid-column:1;grid-row:2}
  .row .go{grid-row:1/3;grid-column:2}
  .row:hover{padding-inline:8px}
  .trio{grid-template-columns:1fr}
  .shot img{min-height:260px}
  .ligne svg{display:none}
  .steps{grid-template-columns:1fr;border-left:2px solid var(--navy);margin-left:8px}
  .step{text-align:left;padding:0 0 28px 24px;position:relative}
  .step::before{content:"";position:absolute;left:-8px;top:4px;width:14px;height:14px;border-radius:50%;background:var(--grad)}
  .step:last-child{padding-bottom:0}
  .pv-imgs img{height:230px}
  .fiche b{min-width:0;flex:0 0 46%}
  .foot{grid-template-columns:1fr;gap:36px}
}
/* ===== pages intérieures (activités, contact, pages légales) ===== */
.menu a[aria-current]{background:var(--beton);font-weight:600}

.hero .fibres{position:relative}

/* ouverture de page */
.phero .wrap{grid-template-columns:minmax(0,1fr);padding-block:64px 84px}
.phero .texte{max-width:760px}
.phero h1{font-size:clamp(2.1rem,4.6vw,3.6rem)}
.phero.court .wrap{padding-block:56px 64px}
.fil{display:flex;flex-wrap:wrap;gap:6px 10px;margin-bottom:44px;font-family:var(--font-m);font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:var(--on-navy)}
.fil li+li::before{content:"/";margin-right:10px;opacity:.5}
.fil a:hover{color:#fff}
.tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:38px}
.tags li{font-family:var(--font-m);font-size:.74rem;letter-spacing:.1em;text-transform:uppercase;border:1px solid rgba(255,255,255,.32);border-radius:6px;padding:7px 11px;color:#fff}
.trace{position:absolute;right:0;bottom:0;width:min(46%,620px);height:auto;opacity:.55;pointer-events:none}

/* deux colonnes */
.duo{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);gap:72px;align-items:start}
.duo.egal{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
.note{margin-top:36px;padding:2px 0 2px 22px;border-left:3px solid var(--green)}
.note h3{font-size:1.12rem}
.note p{color:var(--muted);font-size:.98rem;margin-top:8px;max-width:58ch}
.on-navy .note p{color:var(--on-navy)}

/* liste réglée (« ce que vous obtenez », « exemples d'actions ») */
.acquis{border-top:2px solid currentColor}
.acquis h3{font-family:var(--font-m);font-stretch:100%;font-weight:500;font-size:.78rem;letter-spacing:.14em;text-transform:uppercase;color:var(--green-ink);padding-block:18px 8px}
.on-navy .acquis h3{color:var(--green)}
.acquis li{position:relative;padding:13px 0 13px 28px;border-bottom:1px solid var(--rule)}
.acquis li::before{content:"";position:absolute;left:0;top:1.5em;width:14px;height:3px;background:var(--grad)}
.duo .acquis.bas{margin-top:36px}

/* trois axes, avec numéro */
.axe .n{font-family:var(--font-m);font-size:.78rem;letter-spacing:.14em;color:var(--green-ink);display:block;margin-bottom:10px}
.on-navy .axe .n{color:var(--green)}

/* photos de chantier */
.trio.deux{grid-template-columns:1.25fr 1fr}
.gal{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-top:52px}
.gal figure{border:1px solid var(--line);border-radius:var(--r);overflow:hidden;background:var(--beton)}
.gal img{width:100%;height:340px;object-fit:contain;background:var(--navy-2)}
.gal figcaption{padding:16px 18px}
.gal b{display:block;font-family:var(--font-h);font-stretch:112%;font-weight:700}
.gal span{color:var(--muted);font-size:.93rem}

/* questions fréquentes */
.faq-titre{font-family:var(--font-m);font-stretch:100%;font-weight:500;font-size:.78rem;letter-spacing:.14em;text-transform:uppercase;color:var(--green-ink);padding-bottom:16px}
.on-navy .faq-titre{color:var(--green)}
.faq{border-top:2px solid currentColor}
.faq details{border-bottom:1px solid var(--rule)}
.faq summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:baseline;gap:20px;padding:19px 0;font-family:var(--font-h);font-stretch:112%;font-weight:700;font-size:1.06rem;line-height:1.3}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-family:var(--font-m);font-size:1.2rem;color:var(--green-ink)}
.on-navy .faq summary::after{color:var(--green)}
.faq details[open] summary::after{content:"–"}
.faq p{padding:0 40px 22px 0;color:var(--muted);max-width:64ch}
.on-navy .faq p{color:var(--on-navy)}

/* contact */
.form label{display:block;font-weight:600;font-size:.95rem;margin-top:22px}
.form label:first-child{margin-top:0}
.form input,.form textarea{display:block;width:100%;margin-top:8px;padding:13px 14px;border:1.5px solid var(--line);border-radius:var(--r);font:inherit;font-weight:400;background:var(--paper);color:var(--ink)}
.form textarea{min-height:190px;resize:vertical}
.form input:focus,.form textarea:focus{outline:none;border-color:var(--navy);box-shadow:0 0 0 3px rgba(0,181,176,.25)}
.form .btn{margin-top:28px}
.coord{background:var(--navy);color:#fff;border-radius:var(--r);padding:34px;position:sticky;top:120px}
.coord h2{font-size:1.5rem}
.coord>p{color:var(--on-navy);margin-top:8px}
.coord dl{margin-top:26px}
.coord dt{font-family:var(--font-m);font-size:.74rem;letter-spacing:.14em;text-transform:uppercase;color:var(--green);padding-top:18px;border-top:1px solid rgba(255,255,255,.16);margin-top:18px}
.coord dd{margin-top:6px}

/* pages légales */
.prose{max-width:74ch}
.prose .maj{font-family:var(--font-m);font-size:.78rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.prose h2{font-size:1.4rem;margin-top:44px;padding-top:26px;border-top:1px solid var(--line)}
.prose p,.prose ul{margin-top:14px}
.prose ul{list-style:disc;padding-left:1.2em}
.prose li{margin-top:8px}
.prose a{color:var(--green-ink);text-decoration:underline;text-underline-offset:3px}

@media (max-width:1020px){
  .duo,.duo.egal{grid-template-columns:minmax(0,1fr);gap:44px}
  .trace{display:none}
  .phero .wrap{padding-block:44px 60px}
  .fil{margin-bottom:30px}
  .coord{position:static}
  .trio.deux{grid-template-columns:1fr 1fr}
  .trio.deux .shot:first-child{grid-column:auto}
}
@media (max-width:700px){
  .gal{grid-template-columns:1fr}
  .gal img{height:300px}
  .trio.deux{grid-template-columns:1fr}
  .faq p{padding-right:0}
  .coord{padding:26px}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}