/* ============================================================
   3ZEF — Feuille de style partagée (pages internes)
   Reprend le design system de index.html : tokens, header,
   footer, nav, reveals + composants pages internes (formulaire,
   portfolio, pages légales).
   ============================================================ */

:root{
  --rouge:#8B1212;            /* rouge profond — fonds / boutons */
  --rouge-clair:#DC3B33;      /* rouge vif — textes & accents (contraste AA sur noir) */
  --rouge-fill:#A82020;       /* rouge intermédiaire — survols de fonds */
  --rouge-fonce:#6B0F0F;
  --brique:#3A1818;
  --noir:#0A0807;
  --cendre:#2A2522;
  --ivoire:#EDE4D3;
  --ivoire-soft:#C9BFAE;
  --serif:"Instrument Serif",Georgia,serif;
  --texte:"Fraunces",Georgia,serif;
  --mono:"JetBrains Mono",monospace;
  --mx:clamp(20px,5vw,90px);
  --ok:#3F8E5B;
  --err:#C5453B;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--noir);
  color:var(--ivoire);
  font-family:var(--texte);
  font-weight:300;
  line-height:1.6;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
::selection{background:var(--rouge);color:var(--ivoire)}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
:focus-visible{outline:2px solid var(--rouge-clair);outline-offset:3px;border-radius:2px}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}

/* helpers */
.mono{font-family:var(--mono);font-weight:400;font-size:.7rem;letter-spacing:.18em;text-transform:uppercase;color:var(--ivoire-soft)}
.mono-dim{color:rgba(237,228,211,.55)}
.hair{height:1px;background:rgba(237,228,211,.14);width:100%}
.skip-link{position:absolute;left:-9999px;top:0;z-index:200;background:var(--rouge);color:var(--ivoire);padding:12px 18px;font-family:var(--mono);font-size:.72rem;letter-spacing:.14em;text-transform:uppercase}
.skip-link:focus{left:12px;top:12px}

/* ===== NAV (identique à l'accueil) ===== */
header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  display:flex;align-items:center;justify-content:space-between;
  padding:18px var(--mx);
  transition:background .4s ease,padding .4s ease,border-color .4s;
  border-bottom:1px solid transparent;
}
header.scrolled{
  background:rgba(10,8,7,.72);
  backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(237,228,211,.1);
  padding:12px var(--mx);
}
header .brand{display:flex;align-items:center;gap:14px}
header .brand img{height:30px;width:auto;transition:height .4s}
header.scrolled .brand img{height:24px}
header .brand .tag{font-family:var(--mono);font-size:.62rem;letter-spacing:.2em;color:var(--ivoire-soft);text-transform:uppercase;border-left:1px solid rgba(237,228,211,.25);padding-left:14px}
nav.links{display:flex;align-items:center;gap:34px}
nav.links a{font-family:var(--mono);font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;color:var(--ivoire);opacity:.8;transition:opacity .25s;position:relative}
nav.links a:not(.cta):not(.ig)::after{content:"";position:absolute;left:0;bottom:-6px;width:0;height:1px;background:var(--rouge-clair);transition:width .3s}
nav.links a:not(.cta):hover{opacity:1}
nav.links a:not(.cta):not(.ig):hover::after{width:100%}
nav.links a.current{opacity:1}
nav.links a.current:not(.cta):not(.ig)::after{width:100%}
.ig{position:relative;display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border:1px solid rgba(237,228,211,.3);border-radius:50%;overflow:hidden;transition:border-color .4s,transform .4s}
.ig svg{width:19px;height:19px;position:relative;z-index:2;color:var(--ivoire);stroke:var(--ivoire);transition:stroke .4s,transform .5s}
.ig::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 30% 110%,#A82020 0%,#8B1212 45%,#3A1818 100%);transform:scale(0);border-radius:50%;transition:transform .45s cubic-bezier(.2,.8,.2,1)}
.ig:hover{border-color:transparent;transform:translateY(-2px)}
.ig:hover::before{transform:scale(1.4)}
.ig:hover svg{stroke:var(--ivoire);transform:rotate(8deg) scale(1.1)}
.cta{
  background:var(--rouge);color:var(--ivoire)!important;
  padding:11px 22px;border-radius:2px;opacity:1!important;
  transition:background .3s,transform .3s;border:1px solid var(--rouge);
}
.cta:hover{background:transparent;color:var(--ivoire)!important;transform:translateY(-2px)}
.burger{display:none;flex-direction:column;gap:5px;cursor:pointer;background:none;border:0;padding:10px;margin:-10px}
.burger span{width:26px;height:2px;background:var(--ivoire);transition:.3s}

/* ===== PAGE HERO (en-tête de page interne) ===== */
.page-hero{
  position:relative;padding:172px var(--mx) 74px;overflow:hidden;
  border-bottom:1px solid rgba(237,228,211,.12);
}
.page-hero .glow{position:absolute;border-radius:50%;filter:blur(130px);opacity:.38;
  width:42vw;height:42vw;background:radial-gradient(circle,rgba(139,18,18,.5),transparent 70%);
  top:-16%;right:-6%;z-index:0;pointer-events:none}
.ph-inner{position:relative;z-index:1;max-width:1080px}
/* fil d'ariane */
.crumbs{font-family:var(--mono);font-size:.66rem;letter-spacing:.16em;text-transform:uppercase;color:var(--ivoire-soft);margin-bottom:34px;display:flex;align-items:center;gap:10px}
.crumbs a{transition:color .3s}.crumbs a:hover{color:var(--rouge-clair)}
.crumbs .sep{color:rgba(237,228,211,.3)}
.crumbs span:not(.sep){color:var(--ivoire)}
/* kicker ordonné : index + filet + label */
.ph-kicker{display:flex;align-items:center;gap:16px;margin-bottom:22px}
.ph-kicker .idx{font-family:var(--mono);font-size:.72rem;font-weight:500;letter-spacing:.18em;color:var(--rouge-clair)}
.ph-kicker .rule{height:1px;width:56px;background:rgba(237,228,211,.3)}
.ph-kicker .label{font-family:var(--mono);font-size:.7rem;letter-spacing:.2em;text-transform:uppercase;color:var(--ivoire-soft)}
.page-hero h1{font-family:var(--serif);font-weight:400;font-size:clamp(2.8rem,7vw,5.6rem);line-height:1.03;letter-spacing:-.01em;max-width:18ch}
.page-hero h1 .it{font-style:italic}
.page-hero h1 .red{color:var(--rouge-clair)}
.page-hero .lead{margin-top:28px;max-width:58ch;font-size:1.1rem;color:var(--ivoire-soft);line-height:1.7}

section{position:relative;padding:clamp(60px,9vh,120px) var(--mx)}

/* ===== FORMULAIRE DEVIS ===== */
.form-wrap{display:grid;grid-template-columns:1.4fr .9fr;gap:clamp(40px,6vw,90px);align-items:start}
.devis-form{display:flex;flex-direction:column;gap:30px}
.field-group{display:flex;flex-direction:column;gap:8px}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:24px}
label{font-family:var(--mono);font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;color:var(--ivoire-soft)}
label .req{color:var(--rouge-clair)}
.helper{font-family:var(--texte);font-size:.85rem;color:rgba(237,228,211,.5);font-style:italic}
input,select,textarea{
  width:100%;background:rgba(237,228,211,.04);border:1px solid rgba(237,228,211,.18);
  color:var(--ivoire);font-family:var(--texte);font-size:1rem;font-weight:300;
  padding:14px 16px;border-radius:2px;min-height:48px;transition:border-color .3s,background .3s;
}
textarea{min-height:140px;resize:vertical;line-height:1.6}
select{cursor:pointer;appearance:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%23C9BFAE' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 16px center;padding-right:42px}
input::placeholder,textarea::placeholder{color:rgba(237,228,211,.45)}
/* options de menu déroulant lisibles (fond sombre + texte ivoire) */
select option{background-color:#1A1512;color:var(--ivoire);font-family:var(--texte)}
select option:checked{background-color:var(--rouge);color:var(--ivoire)}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--rouge-clair);background:rgba(237,228,211,.06)}
input:user-invalid,textarea:user-invalid,select:user-invalid{border-color:var(--err)}
.field-group.invalid input,.field-group.invalid select,.field-group.invalid textarea{border-color:var(--err)}
.field-error{font-family:var(--mono);font-size:.64rem;letter-spacing:.08em;color:var(--err);min-height:0;opacity:0;transition:opacity .25s}
.field-group.invalid .field-error{opacity:1}

/* chips type de projet */
.chips{display:flex;flex-wrap:wrap;gap:12px}
.chip{position:relative}
.chip input{position:absolute;opacity:0;width:1px;height:1px}
.chip label{
  display:inline-flex;align-items:center;gap:8px;cursor:pointer;
  font-family:var(--mono);font-size:.68rem;letter-spacing:.1em;text-transform:uppercase;
  color:var(--ivoire-soft);background:rgba(237,228,211,.04);
  border:1px solid rgba(237,228,211,.18);padding:11px 16px;border-radius:2px;
  transition:.25s;min-height:44px;
}
.chip label:hover{border-color:rgba(237,228,211,.4);color:var(--ivoire)}
.chip input:checked+label{background:var(--rouge);border-color:var(--rouge);color:var(--ivoire)}
.chip input:focus-visible+label{outline:2px solid var(--rouge-clair);outline-offset:3px}

/* consentement RGPD */
.consent{display:flex;gap:14px;align-items:flex-start;padding:18px;border:1px solid rgba(237,228,211,.14);border-radius:2px;background:rgba(237,228,211,.02)}
.consent input{width:20px;height:20px;min-height:0;flex:0 0 auto;margin-top:2px;accent-color:var(--rouge);cursor:pointer}
.consent label{font-family:var(--texte);text-transform:none;letter-spacing:0;font-size:.92rem;color:var(--ivoire-soft);line-height:1.55;cursor:pointer}
.consent a{color:var(--rouge-clair);border-bottom:1px solid rgba(168,32,32,.4)}

/* honeypot */
.hp{position:absolute!important;left:-9999px!important;opacity:0;height:0;overflow:hidden}

/* bouton submit */
.submit-btn{
  align-self:flex-start;font-family:var(--mono);font-size:.76rem;letter-spacing:.14em;text-transform:uppercase;
  padding:17px 38px;background:var(--rouge);color:var(--ivoire);border:1px solid var(--rouge);border-radius:2px;
  cursor:pointer;transition:background .3s,transform .3s,opacity .3s;display:inline-flex;align-items:center;gap:12px;min-height:52px;
}
.submit-btn:hover:not(:disabled){background:var(--rouge-fill);border-color:var(--rouge-fill);transform:translateY(-3px)}
.submit-btn:disabled{opacity:.55;cursor:not-allowed}
.spinner{width:16px;height:16px;border:2px solid rgba(237,228,211,.4);border-top-color:var(--ivoire);border-radius:50%;animation:spin .7s linear infinite;display:none}
.submit-btn.loading .spinner{display:inline-block}
@keyframes spin{to{transform:rotate(360deg)}}

/* messages globaux */
.form-msg{font-family:var(--texte);font-size:1rem;padding:18px 20px;border-radius:2px;border:1px solid;display:none;line-height:1.5}
.form-msg.show{display:block}
.form-msg.ok{border-color:var(--ok);background:rgba(63,142,91,.12);color:#9FD9B2}
.form-msg.ko{border-color:var(--err);background:rgba(197,69,59,.12);color:#E8A9A3}

/* écran de confirmation */
.thanks{display:none;text-align:center;padding:40px 0}
.thanks.show{display:block}
.thanks .check{width:70px;height:70px;margin:0 auto 28px;border:1px solid var(--rouge-clair);border-radius:50%;display:flex;align-items:center;justify-content:center}
.thanks .check svg{width:32px;height:32px;stroke:var(--rouge-clair)}
.thanks h2{font-family:var(--serif);font-size:clamp(2rem,5vw,3.4rem);font-weight:400;margin-bottom:16px}
.thanks h2 .it{font-style:italic;color:var(--rouge-clair)}
.thanks p{color:var(--ivoire-soft);max-width:46ch;margin:0 auto 30px}

/* aside infos */
.form-aside{position:sticky;top:120px;display:flex;flex-direction:column;gap:28px;padding:30px;border:1px solid rgba(237,228,211,.12);border-radius:2px;background:rgba(237,228,211,.02)}
.form-aside h2{font-family:var(--serif);font-size:1.7rem;font-weight:400;font-style:italic}
.aside-item{display:flex;flex-direction:column;gap:4px}
.aside-item .k{font-family:var(--mono);font-size:.64rem;letter-spacing:.16em;text-transform:uppercase;color:var(--rouge-clair)}
.aside-item .v{font-size:1.05rem;color:var(--ivoire)}
.aside-item .v a:hover{color:var(--rouge-clair)}
.aside-steps{display:flex;flex-direction:column;gap:14px}
.aside-steps li{display:flex;gap:14px;align-items:baseline;list-style:none}
.aside-steps .num{font-family:var(--serif);font-style:italic;color:var(--rouge-clair);font-size:1.3rem;flex:0 0 auto}
.aside-steps .tx{color:var(--ivoire-soft);font-size:.95rem}

/* ===== PORTFOLIO ===== */
.filters{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:40px}
.filter-btn{font-family:var(--mono);font-size:.68rem;letter-spacing:.12em;text-transform:uppercase;color:var(--ivoire-soft);
  background:none;border:1px solid rgba(237,228,211,.2);padding:10px 18px;border-radius:2px;cursor:pointer;transition:.25s;min-height:44px}
.filter-btn:hover{border-color:rgba(237,228,211,.45);color:var(--ivoire)}
.filter-btn.active{background:var(--rouge);border-color:var(--rouge);color:var(--ivoire)}
.pf-featured{position:relative;display:block;overflow:hidden;border:1px solid rgba(237,228,211,.1);aspect-ratio:21/9;margin-bottom:18px;background:var(--cendre)}
.pf-featured img{width:100%;height:100%;object-fit:cover;transition:transform .9s cubic-bezier(.2,.8,.2,1),filter .6s;filter:brightness(.85)}
.pf-featured:hover img{transform:scale(1.04);filter:brightness(1)}
.pf-featured .meta{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:flex-end;padding:clamp(22px,4vw,46px);background:linear-gradient(to top,rgba(10,8,7,.92),transparent 60%)}
.pf-featured .meta .t{font-family:var(--serif);font-size:clamp(1.8rem,4vw,3rem);line-height:1.05}
.pf-featured .meta .c{font-family:var(--mono);font-size:.66rem;letter-spacing:.15em;text-transform:uppercase;color:var(--rouge-clair);margin-top:8px}
.pf-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.pf-card{position:relative;overflow:hidden;background:var(--cendre);border:1px solid rgba(237,228,211,.08);aspect-ratio:4/3;display:block;color:inherit}
.pf-card img{width:100%;height:100%;object-fit:cover;transition:transform .8s cubic-bezier(.2,.8,.2,1),filter .6s;filter:brightness(.9)}
.pf-card:hover img{transform:scale(1.06);filter:brightness(1.02)}
.pf-card .meta{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:flex-end;padding:22px;background:linear-gradient(to top,rgba(10,8,7,.9),transparent 62%)}
.pf-card .meta .t{font-family:var(--serif);font-size:1.5rem;line-height:1.1}
.pf-card .meta .c{font-family:var(--mono);font-size:.64rem;letter-spacing:.15em;text-transform:uppercase;color:var(--rouge-clair);margin-top:6px}
.pf-card .meta .d{font-size:.9rem;color:var(--ivoire-soft);margin-top:8px;max-width:38ch}
.pf-card[hidden],.pf-featured[hidden]{display:none}
@media(max-width:900px){.pf-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.pf-grid{grid-template-columns:1fr;gap:12px}}

/* ===== PAGES LÉGALES (prose) ===== */
.prose{max-width:75ch}
.prose h2{font-family:var(--serif);font-weight:400;font-size:clamp(1.6rem,3.2vw,2.4rem);margin:48px 0 14px;line-height:1.15}
.prose h2 .red{color:var(--rouge-clair)}
.prose h2:first-child{margin-top:0}
.prose h3{font-family:var(--mono);font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;color:var(--rouge-clair);margin:28px 0 10px}
.prose p,.prose li{color:var(--ivoire-soft);font-size:1.02rem;line-height:1.75;margin-bottom:14px}
.prose ul{padding-left:22px;margin-bottom:14px}
.prose li{margin-bottom:8px}
.prose a{color:var(--ivoire);border-bottom:1px solid rgba(168,32,32,.5);transition:color .3s}
.prose a:hover{color:var(--rouge-clair)}
.prose strong{color:var(--ivoire);font-weight:500}
.prose .updated{font-family:var(--mono);font-size:.66rem;letter-spacing:.14em;text-transform:uppercase;color:rgba(237,228,211,.45);margin-bottom:8px}

/* ===== FOOTER (identique à l'accueil) ===== */
footer{padding:50px var(--mx) 40px;border-top:1px solid rgba(237,228,211,.12);display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:20px}
footer img{height:30px;opacity:.9;transition:filter .3s,opacity .3s}
footer a.flogo:hover img{opacity:1;filter:brightness(0) saturate(100%) invert(15%) sepia(78%) saturate(3800%) hue-rotate(353deg) brightness(92%) contrast(98%)}
footer .fnav{display:flex;gap:26px;flex-wrap:wrap}
footer .fnav a{font-family:var(--mono);font-size:.68rem;letter-spacing:.14em;text-transform:uppercase;color:var(--ivoire-soft);transition:color .3s}
footer .fnav a:hover{color:var(--rouge-clair)}
footer .copy{font-family:var(--mono);font-size:.62rem;letter-spacing:.12em;color:rgba(237,228,211,.5);width:100%;border-top:1px solid rgba(237,228,211,.1);padding-top:22px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}

/* reveal */
.reveal{opacity:0;transform:translateY(34px);transition:opacity .9s cubic-bezier(.2,.8,.2,1),transform .9s cubic-bezier(.2,.8,.2,1)}
.reveal.in{opacity:1;transform:none}

/* responsive nav + layouts */
@media(max-width:900px){
  nav.links{position:fixed;inset:0;background:rgba(10,8,7,.97);flex-direction:column;justify-content:center;gap:30px;transform:translateX(100%);transition:transform .4s;backdrop-filter:blur(10px)}
  nav.links.open{transform:none}
  nav.links a{font-size:1rem}
  .burger{display:flex;z-index:101}
  .burger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .burger.open span:nth-child(2){opacity:0}
  .burger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  body.nav-open{overflow:hidden}
  .form-wrap{grid-template-columns:1fr}
  .form-aside{position:static;order:-1}
}
@media(max-width:620px){
  .field-row{grid-template-columns:1fr}
}