/* ============================================================
   HADEN-GROUPE — Design system
   Identité institutionnelle / holding, distincte de SSIEE-Services.
   Palette : navy profond + accent bronze/or, dérivée du logo arbre.
   Display : Fraunces (serif éditorial) | Corps : Inter | Légal : IBM Plex Mono
   ============================================================ */

:root {
  --navy-950: #0d1b2f;
  --navy-900: #13253d;
  --navy-800: #1c3454;
  --navy-700: #274468;
  --sky-500: #5b8fc9;
  --sky-300: #a9c3e0;
  --gold-600: #b6862c;
  --gold-700: #8f6a22;
  --paper-0: #ffffff;
  --paper-50: #f8f7f3;
  --paper-100: #efece3;
  --line-200: #e3ded2;
  --ink-900: #1a1f29;
  --ink-600: #545a6b;
  --ink-400: #8b8f9e;

  --font-display: "Fraunces", "Noto Sans SC", "Georgia", serif;
  --font-body: "Inter", "Noto Sans SC", -apple-system, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "Noto Sans SC", "Courier New", monospace;

  --radius: 2px;
  --container: 1140px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink-900);
  background: var(--paper-0);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.15;
  margin: 0 0 0.5em;
  color: var(--navy-950);
}
h1 { font-size: clamp(2.2rem, 4.2vw, 3.4rem); font-weight: 500; }
h2 { font-size: clamp(1.55rem, 2.6vw, 2.2rem); }
h3 { font-size: 1.25rem; font-weight: 600; }
p { margin: 0 0 1em; color: var(--ink-600); }

.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gold-700);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.eyebrow::before { content: ""; width: 26px; height: 1px; background: var(--gold-600); display: inline-block; }

/* -------- Header / nav -------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line-200);
}
.nav { display: flex; align-items: center; justify-content: space-between; padding: 16px 0; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand img { height: 58px; width: auto; }
.brand .brand-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--navy-950);
  display: block;
}
.brand .tagline {
  display: block;
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 0.66rem;
  letter-spacing: 0.06em;
  color: var(--ink-400);
  text-transform: uppercase;
}
.nav-links { display: flex; gap: 4px; align-items: center; list-style: none; margin: 0; padding: 0; }
.nav-links a {
  padding: 8px 15px;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--ink-600);
  border-radius: var(--radius);
  transition: color 0.15s ease, background 0.15s ease;
}
.nav-links a:hover { color: var(--navy-950); background: var(--paper-100); }
.nav-links a.current { color: var(--navy-950); font-weight: 700; box-shadow: inset 0 -3px 0 var(--gold-600); }
.nav-cta { background: var(--navy-950) !important; color: #fff !important; padding: 9px 20px !important; }
.nav-cta:hover { background: var(--navy-800) !important; }
.nav-cta.current { background: var(--gold-700) !important; box-shadow: none; }

.nav-toggle { display: none; background: none; border: 1px solid var(--line-200); border-radius: var(--radius); padding: 8px 10px; cursor: pointer; }
.nav-toggle-icon { width: 20px; height: 2px; background: var(--navy-950); display: block; position: relative; }
.nav-toggle-icon::before, .nav-toggle-icon::after { content: ""; position: absolute; left: 0; width: 20px; height: 2px; background: var(--navy-950); }
.nav-toggle-icon::before { top: -6px; }
.nav-toggle-icon::after { top: 6px; }

.lang-switch {
  display: flex; align-items: center; gap: 6px; margin-left: 10px; padding-left: 14px;
  border-left: 1px solid var(--line-200); font-family: var(--font-mono); font-size: 0.75rem;
}
.lang-switch a, .lang-switch span { padding: 4px 6px; color: var(--ink-400); border-radius: 2px; }
.lang-switch a:hover { color: var(--navy-950); background: var(--paper-100); }
.lang-switch .active { color: var(--navy-950); font-weight: 600; }
@media (max-width: 640px) {
  .lang-switch { border-left: none; margin: 12px 0 0; padding-left: 0; }
}

/* -------- Buttons -------- */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 13px 26px; border-radius: var(--radius); font-weight: 600; font-size: 0.95rem; border: 1px solid transparent; cursor: pointer; transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease; }
.btn-primary { background: var(--navy-950); color: #fff; }
.btn-primary:hover { background: var(--navy-800); }
.btn-outline { border-color: var(--navy-950); color: var(--navy-950); }
.btn-outline:hover { background: var(--navy-950); color: #fff; }
.btn-gold { background: var(--gold-600); color: #fff; }
.btn-gold:hover { background: var(--gold-700); }

/* -------- Hero -------- */
.hero {
  padding: 100px 0 76px;
  background: radial-gradient(1000px 420px at 85% -10%, rgba(91,143,201,0.14), transparent 60%), var(--paper-0);
  border-bottom: 1px solid var(--line-200);
}
.hero-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 60px; align-items: center; }
.hero h1 { margin-bottom: 20px; }
.hero .lead { font-size: 1.14rem; max-width: 48ch; }
.hero-actions { display: flex; gap: 14px; margin-top: 30px; flex-wrap: wrap; }

.holding-card { border: 1px solid var(--line-200); border-radius: var(--radius); background: var(--paper-50); padding: 4px; }
.holding-card .h-row { display: flex; align-items: center; gap: 16px; padding: 18px 20px; border-bottom: 1px solid var(--line-200); }
.holding-card .h-row:last-child { border-bottom: none; }
.h-badge { font-family: var(--font-mono); font-size: 0.72rem; color: var(--gold-700); background: rgba(182,134,44,0.1); padding: 4px 8px; border-radius: 2px; white-space: nowrap; }
.h-row strong { display: block; font-family: var(--font-display); font-size: 1.02rem; color: var(--navy-950); }
.h-row span.h-desc { font-size: 0.85rem; color: var(--ink-400); }

/* -------- Sections -------- */
section { padding: 80px 0; }
.section-alt { background: var(--paper-50); border-top: 1px solid var(--line-200); border-bottom: 1px solid var(--line-200); }
.section-head { max-width: 64ch; margin-bottom: 46px; }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px; }

.card { border: 1px solid var(--line-200); border-radius: var(--radius); padding: 32px 28px; background: #fff; }
.card .num { font-family: var(--font-mono); font-size: 0.76rem; color: var(--sky-500); display: block; margin-bottom: 14px; }

/* -------- Participation cards -------- */
.participation {
  border: 1px solid var(--line-200);
  border-radius: var(--radius);
  padding: 36px;
  background: #fff;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: start;
}
.participation + .participation { margin-top: 24px; }
.participation h3 { font-size: 1.4rem; margin-bottom: 8px; }
.participation .sector-tag {
  font-family: var(--font-mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--sky-500); margin-bottom: 10px; display: block;
}
.stake-box {
  text-align: right;
  border-left: 1px solid var(--line-200);
  padding-left: 24px;
  min-width: 160px;
}
.stake-box .stake-n { font-family: var(--font-display); font-size: 1.8rem; color: var(--navy-950); display: block; }
.stake-box .stake-l { font-size: 0.78rem; color: var(--ink-400); }

/* -------- Stats -------- */
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.stat .n { font-family: var(--font-display); font-size: 2.1rem; color: var(--navy-950); font-weight: 600; display: block; }
.stat .l { font-size: 0.85rem; color: var(--ink-400); display: block; margin-top: 6px; }

/* -------- CTA band -------- */
.cta-band { background: var(--navy-950); color: #fff; padding: 66px 0; border-radius: var(--radius); }
.cta-band h2 { color: #fff; }
.cta-band p { color: var(--sky-300); }
.cta-band .container { display: flex; align-items: center; justify-content: space-between; gap: 30px; flex-wrap: wrap; }

/* -------- Forms -------- */
.form-grid { display: grid; gap: 18px; max-width: 640px; }
label { font-size: 0.85rem; font-weight: 600; color: var(--navy-950); display: block; margin-bottom: 6px; }
input, textarea, select {
  width: 100%; padding: 12px 14px; border: 1px solid var(--line-200); border-radius: var(--radius);
  font-family: var(--font-body); font-size: 0.95rem; background: var(--paper-50);
}
input:focus, textarea:focus, select:focus { outline: 2px solid var(--sky-500); outline-offset: 1px; background: #fff; }
textarea { min-height: 140px; resize: vertical; }
.form-note { font-size: 0.82rem; color: var(--ink-400); }

.info-block { border-left: 2px solid var(--gold-600); padding-left: 18px; margin-bottom: 22px; }
.info-block .k { font-family: var(--font-mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--sky-500); }
.info-block .v { font-size: 1rem; color: var(--navy-950); font-weight: 600; }

/* -------- Legal -------- */
.legal { max-width: 76ch; }
.legal h2 { margin-top: 2em; font-size: 1.15rem; }
.legal table { width: 100%; border-collapse: collapse; margin: 1.2em 0; font-size: 0.92rem; }
.legal td { padding: 9px 12px; border: 1px solid var(--line-200); vertical-align: top; }
.legal td:first-child { width: 34%; color: var(--ink-400); font-family: var(--font-mono); font-size: 0.8rem; }

/* -------- Footer -------- */
.site-footer { background: var(--navy-950); color: var(--sky-300); padding: 54px 0 28px; margin-top: 40px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; margin-bottom: 36px; }
.site-footer h4 { color: #fff; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.06em; font-family: var(--font-mono); font-weight: 500; margin-bottom: 14px; }
.site-footer a { color: var(--sky-300); font-size: 0.9rem; }
.site-footer a:hover { color: #fff; }
.footer-links { list-style: none; margin: 0; padding: 0; display: grid; gap: 9px; }
.footer-bottom { border-top: 1px solid var(--navy-800); padding-top: 22px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; font-size: 0.8rem; color: var(--sky-300); }
.footer-bottom .fmono { font-family: var(--font-mono); color: var(--ink-400); }

/* -------- Responsive -------- */
@media (max-width: 880px) {
  .hero-grid { grid-template-columns: 1fr; }
  .grid-3, .grid-2, .stats, .footer-grid { grid-template-columns: 1fr 1fr; }
  .cta-band .container { flex-direction: column; align-items: flex-start; }
  .participation { grid-template-columns: 1fr; }
  .stake-box { text-align: left; border-left: none; border-top: 1px solid var(--line-200); padding-left: 0; padding-top: 16px; }
}
@media (max-width: 640px) {
  .nav-links { display: none; }
  .nav-links.open { display: flex; flex-direction: column; position: absolute; top: 100%; left: 0; right: 0; background: #fff; border-bottom: 1px solid var(--line-200); padding: 12px 24px 20px; gap: 2px; }
  .nav-toggle { display: block; }
  .grid-3, .grid-2, .stats, .footer-grid { grid-template-columns: 1fr; }
  section { padding: 56px 0; }
  .hero { padding: 64px 0 48px; }
}