:root{
  --brun:#3B1309;
  --creme:#FFF9EA;
  --terracotta:#74342B;
  --bleu:#8FA4D1;
  --brun-70:rgba(59,19,9,.7);
  --brun-45:rgba(59,19,9,.45);
  --creme-70:rgba(255,249,234,.7);
  --creme-40:rgba(255,249,234,.4);
  --creme-15:rgba(255,249,234,.15);
  --serif:'Spectral',Georgia,serif;
  --sans:'Archivo',system-ui,sans-serif;
  --pad:clamp(1.5rem,5vw,6rem);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--creme);color:var(--brun);
  font-family:var(--sans);font-weight:400;
  line-height:1.6;-webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4{font-family:var(--serif);font-weight:400;line-height:1.08;letter-spacing:-.01em}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
.eyebrow{font-family:var(--sans);font-size:.7rem;font-weight:600;letter-spacing:.28em;text-transform:uppercase}

/* ---------- custom cursor ---------- */
.ring-cursor{
  position:fixed;top:0;left:0;width:46px;height:46px;
  border:1.5px solid #fff;
  border-radius:47% 53% 44% 56% / 52% 46% 54% 48%;
  pointer-events:none;z-index:9999;transform:translate(-50%,-50%);
  transition:width .25s ease,height .25s ease,background .25s ease,border-color .25s ease,opacity .3s;
  opacity:0;mix-blend-mode:difference;
}
.ring-cursor.on{opacity:1}
.ring-cursor.grow{width:96px;height:96px;background:#fff}
@media (hover:hover) and (pointer:fine){body,a,button,.project,.cta,.pcard{cursor:none}}
@media (hover:none),(pointer:coarse){.ring-cursor{display:none}}

/* ---------- nav ---------- */
header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  display:flex;align-items:center;justify-content:space-between;
  padding:1.5rem var(--pad);
  mix-blend-mode:difference;color:var(--creme);
  transition:padding .4s ease,transform .45s cubic-bezier(.4,0,.2,1),background .4s ease,color .4s ease;
  will-change:transform;
}
/* état "solidifié" : dès qu'on quitte le hero */
header.solid{
  mix-blend-mode:normal;
  background:rgba(255,249,234,.92);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  color:var(--brun);
  border-bottom:1px solid rgba(59,19,9,.08);
  padding-top:1rem;padding-bottom:1rem;
}
header.solid .logo::after{color:var(--terracotta)}
/* masqué quand on descend */
header.hidden{transform:translateY(-100%)}
.logo{font-family:var(--sans);font-weight:700;font-size:2rem;letter-spacing:-.04em;position:relative}
.logo::after{content:'.';color:var(--terracotta)}
nav ul{display:flex;gap:2.4rem;list-style:none}
nav a{font-size:.78rem;font-weight:500;letter-spacing:.14em;text-transform:uppercase;position:relative;padding-bottom:2px}
nav a::after{content:'';position:absolute;left:0;bottom:0;width:0;height:1px;background:currentColor;transition:width .35s ease}
nav a:hover::after,nav a.current::after{width:100%}
.nav-toggle{display:none;background:none;border:none;color:inherit;font-size:.78rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;cursor:pointer}
.nav-close-li{display:none}

/* ---------- generic section ---------- */
section{padding:clamp(4.5rem,11vh,9rem) var(--pad)}
.sec-head{display:flex;align-items:baseline;gap:1rem;margin-bottom:clamp(3.5rem,7vw,5.5rem)}
.sec-head .eyebrow{color:var(--terracotta);font-size:1rem;display:block;margin-bottom:1.6rem}
.sec-head .idx{font-family:var(--serif);font-size:1.2rem;color:var(--brun-70)}
.sec-title{font-size:clamp(2rem,5vw,3.4rem);font-weight:300;max-width:20ch}
.sec-title em{font-style:italic}

/* ---------- page hero (inner pages) ---------- */
.page-hero{
  min-height:52svh;background:var(--brun);color:var(--creme);
  display:flex;flex-direction:column;justify-content:flex-end;
  padding:var(--pad);padding-bottom:clamp(2.5rem,5vh,4rem);position:relative;overflow:hidden;
}
.page-hero .eyebrow{color:var(--bleu);margin-bottom:1.2rem;display:block}
.page-hero h1{font-size:clamp(2.4rem,7vw,5.5rem);font-weight:300}
.page-hero h1 em{font-style:italic}
.page-hero p{max-width:48ch;color:var(--creme-70);margin-top:1.4rem;font-size:1.05rem}
.page-hero .big-ring{
  position:absolute;top:18%;right:var(--pad);
  width:clamp(70px,10vw,120px);height:clamp(70px,10vw,120px);
  border:1.5px solid var(--creme-15);border-radius:47% 53% 44% 56% / 52% 46% 54% 48%;
  animation:spin 26s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- footer ---------- */
footer{background:var(--brun);color:var(--creme);padding:clamp(3rem,6vh,5rem) var(--pad) 2rem}
.foot-top{display:flex;justify-content:space-between;flex-wrap:wrap;gap:2rem;align-items:flex-start}
.foot-top .logo{font-size:2rem}
.foot-links{display:flex;gap:2.4rem;flex-wrap:wrap}
.foot-links a{font-size:.8rem;letter-spacing:.14em;text-transform:uppercase;color:var(--creme-70)}
.foot-links a:hover{color:var(--terracotta)}
.foot-info{display:flex;justify-content:space-between;flex-wrap:wrap;gap:1.5rem;border-top:1px solid var(--creme-15);margin-top:2.5rem;padding-top:1.5rem;font-size:.82rem;color:var(--creme-70)}
.foot-info a:hover{color:var(--terracotta)}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .9s ease,transform .9s cubic-bezier(.2,.8,.2,1)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  .big-ring,.hero-media{animation:none!important}
  html{scroll-behavior:auto}
}

@media (max-width:860px){
  .nav-toggle{display:block;z-index:101}
  nav{position:static}
  /* panneau déroulant : masqué par défaut */
  nav ul{
    position:fixed;top:0;left:0;right:0;
    flex-direction:column;gap:0;
    background:var(--creme);
    padding:5.5rem var(--pad) 2rem;
    transform:translateY(-100%);
    transition:transform .45s cubic-bezier(.4,0,.2,1);
    box-shadow:0 20px 40px rgba(59,19,9,.12);
    display:flex;
  }
  /* ouvert */
  nav.open ul{transform:translateY(0)}
  nav ul li{border-bottom:1px solid rgba(59,19,9,.1)}
  nav ul li:last-child{border-bottom:none}
  nav ul a{
    display:block;color:var(--brun);
    font-family:var(--serif);font-size:1.4rem;font-weight:400;
    letter-spacing:0;text-transform:none;
    padding:1.1rem 0;text-align:center;
  }
  nav ul a::after{display:none}
  /* bouton flèche pour refermer le menu */
  .nav-close-li{border-bottom:none!important;display:flex;justify-content:center;padding-top:1.5rem}
  .nav-close{background:none;border:1px solid rgba(59,19,9,.25);color:var(--brun);width:48px;height:48px;border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:background .35s,color .35s,border-color .35s}
  .nav-close:hover{background:var(--terracotta);border-color:var(--terracotta);color:var(--creme)}
  /* quand le menu est ouvert, le bouton et le logo restent lisibles en brun */
  header.nav-open{mix-blend-mode:normal;color:var(--brun);background:transparent}
  header.nav-open .logo::after{color:var(--terracotta)}
}