/* =====================================================================
   BG CONSULTING — Feuille de style principale
   Palette : bleu marine (--navy) · or (--gold) · ivoire (--ivory)
   Typographie : Playfair Display (titres) + Jost (texte)
   Structure : variables → base → composants → sections → responsive
   ===================================================================== */

/* ---------- Polices (embarquées dans /assets/fonts) ---------- */
@font-face{font-family:'Body';src:url("assets/fonts/jost-400.woff2") format("woff2");font-weight:400;font-display:swap}
@font-face{font-family:'Body';src:url("assets/fonts/jost-500.woff2") format("woff2");font-weight:500;font-display:swap}
@font-face{font-family:'Display';src:url("assets/fonts/playfair-700.woff2") format("woff2");font-weight:700;font-display:swap}

/* ---------- Variables de marque ---------- */
:root{
  --navy:#132238; --navy-d:#0E1A2B; --gold:#BE985C; --gold-soft:#D8BC8C;
  --ivory:#F5F1E9; --paper:#FBF9F4; --ink:#1B2A3E; --slate:#586A82; --mist:#AEB9C9;
  --line-d:rgba(190,152,92,.26); --line-l:rgba(19,34,56,.12);
  --maxw:1080px; --pad:28px;
}

/* ---------- Base ---------- */
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:'Body',system-ui,-apple-system,sans-serif;color:var(--ink);background:var(--paper);
  line-height:1.65;font-size:17px;-webkit-font-smoothing:antialiased}
h1,h2,h3{font-family:'Display',Georgia,serif;font-weight:700;line-height:1.16;letter-spacing:.01em}
a{color:inherit}
img{max-width:100%;display:block}

/* ---------- Utilitaires ---------- */
.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 var(--pad)}
.narrow{max-width:820px}
.center{text-align:center}
.center .hair,.center h2,.center .lead,.center .stmt{margin-left:auto;margin-right:auto}
.mt{margin-top:22px}
.eyebrow{font-size:12px;letter-spacing:.34em;text-transform:uppercase;color:var(--gold);font-weight:500;margin-bottom:22px}
.lead{color:var(--slate);font-size:clamp(17px,1.9vw,19px);max-width:62ch}
.hair{width:52px;height:1px;background:var(--gold);margin:26px 0}
h2{font-size:clamp(28px,4.4vw,44px);max-width:20ch}
.stmt{font-family:'Display',serif;font-size:clamp(30px,4.8vw,50px);line-height:1.2;max-width:18ch;color:var(--ink)}
section{padding:clamp(80px,11vw,144px) 0;position:relative;overflow:hidden}
[id]{scroll-margin-top:78px}

/* Sections sombres (fond navy, texte ivoire) */
.dark{background:var(--navy);color:var(--ivory)}
.dark h2{color:var(--ivory)}
.dark .lead{color:var(--mist)}
.dark .stmt{color:var(--ivory)}

/* Filigrane monogramme discret */
.watermark{position:absolute;right:-80px;bottom:-110px;width:520px;opacity:.05;pointer-events:none}

/* ---------- Boutons ---------- */
.btn{display:inline-block;text-decoration:none;font-weight:500;font-size:15px;letter-spacing:.04em;
  padding:15px 34px;border-radius:2px;transition:transform .18s,background .25s,color .25s,border-color .25s}
.btn:active{transform:scale(.98)}
.btn-primary{background:var(--gold);color:#241a0c}
.btn-primary:hover{background:var(--gold-soft)}
.btn-ghost{background:transparent;color:var(--ivory);border:1px solid var(--line-d)}
.btn-ghost:hover{border-color:var(--gold);color:var(--gold-soft)}

/* ---------- Navigation fixe ---------- */
.nav{position:fixed;top:0;left:0;right:0;z-index:50;display:flex;align-items:center;justify-content:space-between;
  padding:15px var(--pad);background:rgba(14,26,43,.72);backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--line-d)}
.nav .brand{display:flex;align-items:center;gap:12px;text-decoration:none}
.nav .brand img{width:34px;height:34px}
.nav .brand span{font-weight:500;letter-spacing:.26em;font-size:13px;color:var(--ivory)}
.nav-links{display:flex;gap:28px;align-items:center}
.nav-links a{text-decoration:none;color:var(--mist);font-size:13px;letter-spacing:.05em;transition:color .25s}
.nav-links a:hover{color:var(--gold-soft)}
.menu-btn{display:none;background:none;border:0;color:var(--ivory);font-size:14px;letter-spacing:.1em;cursor:pointer}

/* ---------- Hero ---------- */
.hero{min-height:100svh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;
  background:radial-gradient(120% 90% at 50% -10%,#1C2F4B 0%,var(--navy) 48%,var(--navy-d) 100%);
  color:var(--ivory);padding:120px var(--pad) 92px}
.hero img.logo{width:clamp(96px,13vw,128px);height:auto;margin-bottom:38px}
.hero h1{font-size:clamp(34px,6.4vw,64px);max-width:16ch;margin:0 auto}
.hero .brandline{margin-top:30px;font-size:13px;letter-spacing:.32em;text-transform:uppercase;color:var(--gold)}
.hero .brandline b{color:var(--ivory);font-weight:500}
.hero .btn{margin-top:44px}
.hero .scroll{margin-top:56px;font-size:11px;letter-spacing:.3em;text-transform:uppercase;color:var(--mist)}
/* Animation d'entrée discrète (respecte prefers-reduced-motion, voir plus bas) */
.ha{opacity:0;transform:translateY(16px);animation:up .9s cubic-bezier(.2,.7,.2,1) forwards}
.d1{animation-delay:.15s}.d2{animation-delay:.5s}.d3{animation-delay:.9s}.d4{animation-delay:1.25s}.d5{animation-delay:1.6s}
@keyframes up{to{opacity:1;transform:none}}

/* ---------- Prestations (cartes) ---------- */
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1px;
  background:var(--line-l);border:1px solid var(--line-l);margin-top:54px}
.card{background:var(--paper);padding:40px 34px;transition:background .3s,transform .3s}
.card:hover{background:#fff;transform:translateY(-3px)}
.card .k{font-size:12px;letter-spacing:.2em;color:var(--gold)}
.card h3{font-size:23px;margin:14px 0 12px;color:var(--ink)}
.card p{color:var(--slate);font-size:15.5px}

/* ---------- Principes (lignes) ---------- */
.rows{margin-top:50px;border-top:1px solid var(--line-d)}
.row{display:grid;grid-template-columns:1fr 2fr;gap:30px;padding:30px 0;
  border-bottom:1px solid var(--line-d);align-items:baseline}
.row h3{font-size:22px;color:var(--ivory)}
.row p{color:var(--mist);font-size:16px}

/* ---------- Expérience ---------- */
.exp{display:flex;align-items:baseline;gap:32px;flex-wrap:wrap;margin-top:20px}
.exp .big{font-family:'Display',serif;font-size:clamp(70px,13vw,150px);color:var(--gold);line-height:.9}
.exp .txt{max-width:34ch}
.exp .txt h2{max-width:none}

/* ---------- Méthode (étapes) ---------- */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));margin-top:56px;border-top:1px solid var(--line-l)}
.step{padding:34px 30px 34px 0;border-bottom:1px solid var(--line-l)}
.step .n{font-family:'Display',serif;font-size:20px;color:var(--gold)}
.step h3{font-size:24px;margin:10px 0 10px;color:var(--ink)}
.step p{color:var(--slate);font-size:15px;max-width:26ch}

/* ---------- Honoraires ---------- */
.note{margin-top:40px;padding:36px;border:1px solid var(--line-d);text-align:center;
  color:var(--mist);font-size:15px;letter-spacing:.02em}

/* ---------- FAQ ---------- */
.faq{margin-top:46px;max-width:820px}
.faq details{border-top:1px solid var(--line-l)}
.faq details:last-child{border-bottom:1px solid var(--line-l)}
.faq summary{list-style:none;cursor:pointer;padding:26px 0;font-family:'Display',serif;font-size:20px;
  color:var(--ink);display:flex;justify-content:space-between;gap:20px;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--gold);font-size:24px;transition:transform .25s}
.faq details[open] summary::after{content:"–"}
.faq p{padding:0 0 26px;color:var(--slate);font-size:16px;max-width:70ch}

/* ---------- Contact ---------- */
.actions{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:14px;max-width:720px;margin:52px auto 0}

/* ---------- Pied de page ---------- */
footer{background:var(--navy-d);color:var(--mist);text-align:center;padding:66px var(--pad)}
footer img{width:56px;height:56px;margin:0 auto 20px}
footer .fb{letter-spacing:.28em;font-size:13px;color:var(--ivory)}
footer a{color:var(--mist);text-decoration:none}
footer .legal{margin-top:18px;font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--gold);opacity:.8}
footer .fine{margin-top:14px;font-size:12px;color:#6c7a90}

/* ---------- Révélation au défilement (JS ajoute .in) ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .9s ease,transform .9s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}

/* ---------- Responsive (mobile prioritaire) ---------- */
@media (max-width:820px){
  .nav-links{position:fixed;inset:0 0 auto 0;flex-direction:column;gap:0;background:var(--navy-d);
    padding:84px var(--pad) 28px;transform:translateY(-100%);transition:transform .35s;border-bottom:1px solid var(--line-d)}
  .nav-links.open{transform:none}
  .nav-links a{padding:15px 0;border-bottom:1px solid var(--line-d);width:100%;font-size:15px}
  .menu-btn{display:block;z-index:60}
  .row{grid-template-columns:1fr;gap:8px}
  .watermark{display:none}
}

/* ---------- Accessibilité : mouvement réduit ---------- */
@media (prefers-reduced-motion:reduce){
  *{scroll-behavior:auto}
  .reveal,.ha{opacity:1;transform:none;transition:none;animation:none}
}