/* ============================================================
   STUDIO PORTFOLIO — direction "catalogue d'archives"
   Palette papier + encre, typographie serif/sans/mono système
   (aucune police externe : chargement instantané, y compris
   sur connexion lente)
   ============================================================ */

:root{
  --bg:#eef1ea;
  --bg-alt:#e4e8db;
  --surface:#fffefa;
  --ink:#1f241f;
  --ink-soft:#5c655a;
  --ink-faint:#8b9285;
  --accent:#a8752a;
  --accent-deep:#7d5a1e;
  --stamp:#2f5049;
  --stamp-soft:#dce6e0;
  --line:#d8d3c0;
  --line-strong:#c3bda6;
  --radius:14px;
  --font-display:Georgia,'Iowan Old Style','Times New Roman',serif;
  --font-body:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,'Liberation Mono',monospace;
  --container:1180px;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-body);
  background:var(--bg);
  color:var(--ink);
  line-height:1.65;
  font-size:16px;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
::selection{background:var(--accent);color:#fff}

:focus-visible{outline:2px solid var(--stamp);outline-offset:3px;border-radius:4px}

.container{width:min(var(--container),92%);margin:auto}

/* ---------- top bar ---------- */
.nav{
  position:sticky;top:0;z-index:40;
  background:rgba(238,241,234,.92);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.nav-inner{display:flex;justify-content:space-between;align-items:center;padding:16px 0}
.brand{font-family:var(--font-display);font-weight:700;font-size:1.15rem;letter-spacing:-.01em;display:flex;align-items:center;gap:9px;color:var(--accent);font-style:italic}
.brand-mark{
  height:30px;width:auto;flex:none;display:block;
}
.brand span{color:var(--accent);font-style:italic}

.nav-links{display:flex;align-items:center;gap:4px}
.nav-links a{
  margin-left:4px;color:var(--ink-soft);font-weight:600;font-size:.94rem;
  padding:8px 12px;border-radius:8px;
}
.nav-links a:hover{color:var(--ink);background:var(--bg-alt)}
.nav-links a.active{color:var(--ink);background:var(--stamp-soft)}

.nav-toggle{
  display:none;border:1px solid var(--line-strong);background:var(--surface);
  border-radius:8px;padding:8px 10px;cursor:pointer;
}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--ink);margin:4px 0;border-radius:2px}

/* ---------- eyebrow / tabs (signature folder-tab shape) ---------- */
.tab{
  display:inline-flex;align-items:center;gap:6px;
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.06em;text-transform:uppercase;
  color:var(--stamp);background:var(--stamp-soft);
  padding:6px 12px 6px 10px;
  clip-path:polygon(0 0,calc(100% - 10px) 0,100% 100%,0 100%);
}
.pill{
  display:inline-block;font-family:var(--font-mono);font-size:.72rem;letter-spacing:.03em;
  color:var(--stamp);background:var(--stamp-soft);
  padding:5px 10px 5px 12px;border-radius:0 8px 8px 0;border-left:3px solid var(--stamp);
  text-transform:uppercase;
}

/* reference number, corner-of-card motif */
.ref{
  font-family:var(--font-mono);font-size:.72rem;color:var(--ink-faint);letter-spacing:.03em;
}

/* ---------- type ---------- */
h1,h2,h3,h4{font-family:var(--font-display);line-height:1.08;margin:0 0 .5em;color:var(--ink);font-weight:700}
h1{font-size:clamp(2.1rem,4.6vw,3.6rem);letter-spacing:-.01em}
h2{font-size:clamp(1.5rem,2.6vw,2.1rem)}
h3{font-size:1.15rem}
p{color:var(--ink-soft);margin:0 0 1em}
.lede{font-size:1.15rem;max-width:56ch}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  margin-top:8px;background:var(--ink);color:#fdfcf7;
  padding:12px 18px;border-radius:9px;font-weight:700;font-size:.95rem;
  border:1px solid var(--ink);
}
.btn:hover{background:var(--accent-deep);border-color:var(--accent-deep)}
.btn-outline{
  background:transparent;color:var(--ink);border:1px solid var(--line-strong);
}
.btn-outline:hover{border-color:var(--ink);background:var(--surface)}

/* ---------- layout blocks ---------- */
.section{padding:56px 0}
.section-alt{background:var(--bg-alt)}
.hr{border:none;border-top:1px solid var(--line);margin:0}

.hero{padding:64px 0 44px;position:relative;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.hero-eyebrow{margin-bottom:18px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}
.hero-stats{display:flex;gap:28px;margin-top:34px;flex-wrap:wrap}
.hero-stat b{display:block;font-family:var(--font-display);font-size:1.6rem;color:var(--ink)}
.hero-stat span{font-size:.82rem;color:var(--ink-faint)}

/* stacked index-card visual (pure CSS signature element) */
.card-stack{position:relative;height:300px}
.stack-card{
  position:absolute;width:78%;left:11%;top:14px;
  background:var(--surface);border:1px solid var(--line-strong);border-radius:10px;
  padding:18px 20px;box-shadow:0 18px 30px -18px rgba(31,36,31,.35);
}
.stack-card .ref{display:block;margin-bottom:8px}
.stack-card h4{margin:0 0 4px;font-size:1rem}
.stack-card p{margin:0;font-size:.85rem}
.stack-card:nth-child(1){transform:rotate(-7deg);z-index:1;top:52px}
.stack-card:nth-child(2){transform:rotate(4deg);z-index:2;top:26px;left:14%}
.stack-card:nth-child(3){transform:rotate(-1.5deg);z-index:3;top:0;left:10%}

/* ---------- grids & cards ---------- */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.grid2{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}

.card{
  position:relative;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);padding:24px;
}
.card::before{
  content:"";position:absolute;top:0;left:20px;width:34px;height:6px;
  background:var(--line-strong);border-radius:0 0 4px 4px;
}
.card:hover{border-color:var(--accent);box-shadow:0 14px 28px -18px rgba(31,36,31,.28)}
.card-head{display:flex;justify-content:space-between;align-items:flex-start;gap:10px;margin-bottom:10px}

/* category folder-tabs on the hub page */
.cat-row{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0 8px}
.cat-btn{
  font-family:var(--font-mono);font-size:.78rem;letter-spacing:.02em;
  padding:8px 14px;border:1px solid var(--line-strong);background:var(--surface);
  border-radius:0 10px 10px 0;border-left:3px solid var(--line-strong);cursor:pointer;color:var(--ink-soft);
}
.cat-btn:hover{color:var(--ink);border-color:var(--ink-soft)}
.cat-btn.active{background:var(--stamp);border-color:var(--stamp);color:#fff;border-left-color:var(--stamp)}

/* ---------- sample / deliverable preview ---------- */
.sample{background:var(--surface);color:var(--ink);border:1px solid var(--line);border-radius:var(--radius);padding:26px;margin-top:20px}
.sample p,.sample li{color:var(--ink-soft)}
.sample h3,.sample h4{color:var(--ink);font-family:var(--font-display)}
.sample code,.sample pre{
  background:var(--bg-alt);color:var(--ink);font-family:var(--font-mono);font-size:.86rem;
  padding:16px;border-radius:10px;display:block;overflow:auto;border:1px solid var(--line);
}

/* ---------- sidebar (service detail pages) ---------- */
.sidebar-layout{display:grid;grid-template-columns:270px 1fr;gap:28px}
.sidebar{
  position:sticky;top:82px;align-self:start;max-height:calc(100vh - 100px);overflow:auto;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:14px;
}
.sidebar strong{
  display:block;font-family:var(--font-mono);font-size:.72rem;text-transform:uppercase;
  letter-spacing:.08em;color:var(--ink-faint);padding:6px 10px 10px;
}
.sidebar a{display:block;padding:8px 10px;border-radius:8px;color:var(--ink-soft);font-size:.92rem}
.sidebar a:hover{background:var(--bg-alt);color:var(--ink)}
.sidebar a.current{background:var(--stamp-soft);color:var(--stamp);font-weight:700}

/* ---------- search ---------- */
.search{
  width:100%;padding:14px 16px;border-radius:10px;border:1px solid var(--line-strong);
  background:var(--surface);color:var(--ink);font-size:1rem;margin:14px 0 6px;font-family:var(--font-body);
}
.search::placeholder{color:var(--ink-faint)}

/* ---------- contact ---------- */
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:22px}
.contact-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.contact-card .ref{display:block;margin-bottom:10px}

/* ---------- contact form ---------- */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-field{margin-bottom:16px}
.form-field label{
  display:block;font-family:var(--font-mono);font-size:.75rem;text-transform:uppercase;
  letter-spacing:.05em;color:var(--ink-faint);margin-bottom:6px;
}
.form-field input,.form-field select,.form-field textarea{
  width:100%;padding:12px 14px;border-radius:10px;border:1px solid var(--line-strong);
  background:var(--bg);color:var(--ink);font-size:.98rem;font-family:var(--font-body);
}
.form-field input::placeholder,.form-field textarea::placeholder{color:var(--ink-faint)}
.form-field textarea{resize:vertical;min-height:130px}
.form-field input:focus,.form-field select:focus,.form-field textarea:focus{border-color:var(--stamp)}
.visually-hidden{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.form-status{margin-top:14px;font-size:.9rem;min-height:1.4em}
.form-status.success{color:var(--stamp)}
.form-status.error{color:#a6402c}
@media(max-width:600px){.form-grid{grid-template-columns:1fr}}

/* ---------- footer ---------- */
.footer{padding:54px 0 30px;border-top:1px solid var(--line);margin-top:20px;background:var(--bg-alt)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:32px}
.footer h4{font-family:var(--font-mono);font-size:.72rem;text-transform:uppercase;letter-spacing:.08em;color:var(--ink-faint);margin-bottom:12px}
.footer a{display:block;color:var(--ink-soft);padding:4px 0;font-size:.92rem}
.footer a:hover{color:var(--ink)}
.footer-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;margin-top:34px;padding-top:20px;border-top:1px solid var(--line);color:var(--ink-faint);font-size:.82rem}

/* ---------- reveal-on-scroll (guarded by JS + reduced-motion) ---------- */
.reveal{opacity:0;transform:translateY(10px);transition:opacity .5s ease,transform .5s ease}
.reveal.in-view{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
}

/* ---------- responsive ---------- */
@media(max-width:900px){
  .hero-grid{grid-template-columns:1fr}
  .card-stack{height:230px;margin-top:10px}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:850px){
  .grid,.grid2,.sidebar-layout,.contact-grid{grid-template-columns:1fr}
  .nav-links{
    display:none;position:absolute;top:100%;left:0;right:0;
    background:var(--bg);border-bottom:1px solid var(--line);
    flex-direction:column;align-items:stretch;padding:8px 5%;
  }
  .nav-links.open{display:flex}
  .nav-links a{margin:2px 0;padding:12px}
  .nav-toggle{display:block}
  .sidebar{position:static;max-height:none}
  .footer-grid{grid-template-columns:1fr}
}
@media(max-width:520px){
  .hero{padding:40px 0 28px}
  .section{padding:40px 0}
  .hero-stats{gap:20px}
}