/* ===== Design tokens ===== */
:root{
  /* Brand */
  --navy:#101a30;
  --navy-soft:#1a2744;
  --navy-line:#243252;
  --orange:#ec6608;
  --orange-soft:#fde3cc;
  --teal:#0e7490;         /* 3e teinte de la charte, dérivée du duo navy/orange pour distinguer une section supplémentaire */
  --teal-soft:#d9eef3;
  --cream:#f7f8fb;
  --white:#ffffff;
  --ink:#12162a;
  --ink-soft:#5b6580;
  --radius:14px;

  /* Semantic tokens (theme-aware) — light by default */
  --bg:var(--cream);
  --surface:var(--white);
  --surface-2:#f3f4f8;
  --text:var(--ink);
  --text-soft:var(--ink-soft);
  --border:#e3e6f0;
  --nav-bg:rgba(247,248,251,0.92);
  --tag-bg:#eef1f8;
  --tag-text:#3c4562;
}

/* System dark mode (progressive enhancement, no JS required) */
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#0b1220;
    --surface:#141d33;
    --surface-2:#0f1728;
    --text:#eef1fa;
    --text-soft:#a9b2c9;
    --border:#232f4d;
    --nav-bg:rgba(11,18,32,0.85);
    --tag-bg:#1c2744;
    --tag-text:#c3cadf;
  }
}

/* Manual toggle override (persisted via localStorage) */
:root[data-theme="dark"]{
  --bg:#0b1220;
  --surface:#141d33;
  --surface-2:#0f1728;
  --text:#eef1fa;
  --text-soft:#a9b2c9;
  --border:#232f4d;
  --nav-bg:rgba(11,18,32,0.85);
  --tag-bg:#1c2744;
  --tag-text:#c3cadf;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:'Work Sans',sans-serif;-webkit-font-smoothing:antialiased;
  transition:background .3s ease,color .3s ease;
}
h1,h2,h3,.eyebrow,.stat-num{font-family:'Poppins',sans-serif;}
a{color:inherit;}

/* NAV */
nav{
  position:sticky;top:0;z-index:50;display:flex;align-items:center;justify-content:space-between;
  padding:18px 6vw;background:var(--nav-bg);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--border);gap:16px;
}
.brand{display:flex;flex-direction:column;line-height:1.1;}
.brand-name{font-family:'Poppins',sans-serif;font-weight:800;font-size:15px;letter-spacing:0.02em;}
.brand-sub{font-size:11px;color:var(--text-soft);letter-spacing:0.08em;text-transform:uppercase;}
.nav-right{display:flex;align-items:center;gap:12px;}
.navlinks{display:flex;gap:6px;background:var(--orange-soft);border-radius:999px;padding:5px;}
.navlinks a{padding:8px 16px;border-radius:999px;font-size:13px;font-weight:600;text-decoration:none;color:#a34600;transition:all .25s ease;}
.navlinks a:hover{background:var(--navy);color:#fff;}

.theme-toggle{
  display:flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:50%;
  border:1px solid var(--border);background:var(--surface);color:var(--text);cursor:pointer;
  font-size:16px;line-height:1;transition:all .25s ease;flex-shrink:0;
}
.theme-toggle:hover{border-color:var(--orange);color:var(--orange);}
.theme-toggle .icon-sun{display:none;}
.theme-toggle .icon-moon{display:block;}
:root[data-theme="dark"] .theme-toggle .icon-sun{display:block;}
:root[data-theme="dark"] .theme-toggle .icon-moon{display:none;}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]) .theme-toggle .icon-sun{display:block;}
  :root:not([data-theme="light"]) .theme-toggle .icon-moon{display:none;}
}

/* HERO */
.hero{
  background:radial-gradient(circle at 80% 20%, #1c2c50 0%, var(--navy) 55%);
  color:#fff;padding:8vw 6vw 7vw;display:grid;grid-template-columns:1.15fr 0.85fr;gap:60px;align-items:center;
}
.eyebrow{
  display:inline-block;font-size:12px;font-weight:700;letter-spacing:0.12em;text-transform:uppercase;
  color:var(--orange);background:rgba(236,102,8,0.14);padding:7px 14px;border-radius:999px;margin-bottom:22px;
}
h1{font-size:clamp(32px,4vw,54px);font-weight:800;line-height:1.08;margin:0 0 20px;letter-spacing:-0.01em;}
h1 span{color:var(--orange);}
.hero-sub{font-size:16.5px;line-height:1.65;color:#c3cadf;max-width:520px;margin-bottom:32px;}
.stat-row{display:flex;gap:32px;flex-wrap:wrap;}
.stat{border-left:3px solid var(--orange);padding-left:14px;}
.stat-num{font-size:26px;font-weight:800;display:block;color:#fff;}
.stat-label{font-size:12px;color:#a9b2c9;}

/* mock kanban preview */
.mock{background:#fff;border-radius:16px;overflow:hidden;box-shadow:0 30px 60px -25px rgba(0,0,0,0.5);transform:rotate(-1deg);}
.mock-bar{display:flex;align-items:center;gap:6px;padding:10px 14px;background:var(--navy-soft);}
.mock-dot{width:9px;height:9px;border-radius:50%;background:var(--orange);}
.mock-title{margin-left:10px;font-size:11px;color:#dfe4f0;font-weight:600;letter-spacing:0.04em;}
.mock-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;padding:16px;}
.mock-col{background:#f3f4f8;border-radius:10px;padding:8px;}
.mock-col-head{font-size:10px;font-weight:700;color:var(--ink-soft);text-transform:uppercase;margin-bottom:8px;letter-spacing:0.04em;}
.mock-card{background:#fff;border:1px solid #e3e6f0;border-radius:8px;padding:8px;font-size:9.5px;color:var(--ink);margin-bottom:6px;box-shadow:0 2px 6px rgba(0,0,0,0.04);}
.mock-card b{display:block;font-size:10px;margin-bottom:3px;}
.mock-card .tag{display:inline-block;background:var(--orange-soft);color:#a34600;font-size:8px;font-weight:700;padding:2px 6px;border-radius:999px;}

/* SECTIONS */
section.group{padding:2vw 6vw 5vw;}
.group-head{max-width:640px;margin-bottom:36px;}
.group-tag{font-size:12px;font-weight:700;letter-spacing:0.1em;text-transform:uppercase;color:var(--accent,var(--orange));}
.group-title{font-size:clamp(24px,2.4vw,32px);font-weight:700;margin:8px 0 10px;color:var(--text);}
.group-desc{color:var(--text-soft);font-size:15px;line-height:1.6;}

/* Accent par section — dérivé de la charte (navy / orange) + 3e teinte teal pour le pilotage */
#erp{--accent:var(--orange);--accent-soft:var(--orange-soft);}
#relation{--accent:var(--navy);--accent-soft:#e4e8f2;}
#pilotage{--accent:var(--teal);--accent-soft:var(--teal-soft);}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]) #relation{--accent-soft:#232f4d;}
  :root:not([data-theme="light"]) #pilotage{--accent-soft:#0f2b33;}
  :root:not([data-theme="light"]) #erp{--accent-soft:#3a2412;}
}
:root[data-theme="dark"] #relation{--accent-soft:#232f4d;}
:root[data-theme="dark"] #pilotage{--accent-soft:#0f2b33;}
:root[data-theme="dark"] #erp{--accent-soft:#3a2412;}

.cards{display:grid;gap:22px;}
.cards.one{grid-template-columns:1fr;}
.cards.two{grid-template-columns:repeat(2,1fr);}
.cards.three{grid-template-columns:repeat(3,1fr);}

.card{
  /* fallback pour les navigateurs sans color-mix() : fond neutre uni */
  background:var(--surface);
  /* fond teinté par la couleur d'accent de la section (charte graphique), très légèrement dosé pour rester lisible */
  background:color-mix(in srgb, var(--accent, var(--orange)) 7%, var(--surface));
  border:1px solid var(--border);border-top:4px solid var(--accent,var(--orange));
  border-radius:var(--radius);padding:28px;
  opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease,background .3s ease,border-color .3s ease;
}
.card.visible{opacity:1;transform:translateY(0);}
.card-top{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:14px;}
.card h3{font-size:18px;font-weight:700;margin:0;color:var(--text);}
.card-icon{
  width:38px;height:38px;border-radius:10px;display:flex;align-items:center;justify-content:center;flex-shrink:0;
  background:var(--accent-soft,var(--orange-soft));
  background:color-mix(in srgb, var(--accent, var(--orange)) 22%, var(--surface));
}
.card p{font-size:14px;line-height:1.65;color:var(--text-soft);margin:0 0 16px;}
.tags{display:flex;flex-wrap:wrap;gap:8px;}
.tag{font-size:11.5px;font-weight:600;background:var(--tag-bg);color:var(--tag-text);padding:5px 11px;border-radius:999px;}
.impact{margin-top:16px;padding-top:16px;border-top:1px dashed var(--border);font-size:13px;color:var(--accent,#a34600);font-weight:600;}

.featured{background:linear-gradient(135deg,var(--navy) 0%, #182544 100%);color:#fff;border:1px solid transparent;border-top:4px solid var(--orange);}
.featured h3{color:#fff;}
.featured p{color:#c3cadf;}
.featured .tag{background:rgba(255,255,255,0.1);color:#ffd4ad;}
.featured .card-icon{background:rgba(236,102,8,0.2);}
.featured .impact{color:var(--orange);border-top-color:rgba(255,255,255,0.15);}

/* KPI strip */
.kpi-strip{background:var(--navy);color:#fff;padding:50px 6vw;display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.kpi{text-align:center;}
.kpi-num{font-size:30px;font-weight:800;color:var(--orange);font-family:'Poppins',sans-serif;}
.kpi-label{font-size:12.5px;color:#a9b2c9;margin-top:6px;}

/* FOOTER */
footer{background:var(--ink);color:#c3cadf;padding:60px 6vw 30px;}
.footer-top{display:flex;justify-content:space-between;flex-wrap:wrap;gap:30px;margin-bottom:40px;}
.footer-brand{font-family:'Poppins',sans-serif;font-weight:800;font-size:18px;color:#fff;}
.footer-role{font-size:13px;color:var(--orange);margin-top:4px;}
.footer-note{max-width:380px;font-size:13.5px;line-height:1.6;color:#8b93ac;}
.footer-bottom{border-top:1px solid rgba(255,255,255,0.08);padding-top:22px;font-size:12px;color:#6d7593;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;}

@media (max-width:900px){
  .hero{grid-template-columns:1fr;padding-top:14vw;}
  .cards.two, .cards.three{grid-template-columns:1fr;}
  .kpi-strip{grid-template-columns:repeat(2,1fr);}
  .navlinks{display:none;}
}