/* ============== RESET ============== */
* { box-sizing: border-box; }
html, body { height: 100%; }
body{
  margin:0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a{ color: inherit; text-decoration: none; }
img{ max-width:100%; display:block; }
button, input, textarea{ font: inherit; }
:focus-visible{
  outline: 3px solid color-mix(in oklab, var(--accent2) 70%, white);
  outline-offset: 3px;
  border-radius: 14px;
}

/* ============== THEME ============== */
:root{
  --bg:#ffffff;
  --text:#0b0c10;
  --muted:#5b6274;
  --border: rgba(15, 23, 42, 0.12);
  --card: rgba(255,255,255,0.72);
  --shadow: 0 14px 34px rgba(0,0,0,0.08);
  --radius: 22px;
  --container: 1120px;
  --accent:#ffd54d;   /* jaune */
  --accent2:#2b6cff;  /* bleu tech */
}
@media (prefers-color-scheme: dark){
  :root{
    --bg:#070a10;
    --text:#f2f5ff;
    --muted:#a8b0c2;
    --border: rgba(255,255,255,0.14);
    --card: rgba(18,22,32,0.62);
    --shadow: 0 18px 44px rgba(0,0,0,0.42);
    --accent:#ffd84a;
    --accent2:#7aa7ff;
  }
}

/* ============== LAYOUT ============== */
.container{
  width: min(var(--container), calc(100% - 40px));
  margin-inline: auto;
}
.section{
  padding: clamp(56px, 7vw, 96px) 0;
}
.section-alt{
  background:
    radial-gradient(1000px 520px at 15% -5%, color-mix(in oklab, var(--accent2) 18%, transparent), transparent 60%),
    radial-gradient(900px 420px at 90% 10%, color-mix(in oklab, var(--accent) 18%, transparent), transparent 55%);
}
.section-head{ margin-bottom: 26px; }
h1,h2,h3{ letter-spacing: -0.02em; }
.section-title{
  margin:0 0 8px;
  font-size: clamp(26px, 3.2vw, 40px);
}
.section-subtitle{
  margin:0;
  color: var(--muted);
  max-width: 75ch;
}

/* ============== HEADER / NAV ============== */
.site-header{
  position: sticky; top:0; z-index: 50;
  backdrop-filter: blur(16px);
  background: color-mix(in oklab, var(--bg) 76%, transparent);
  border-bottom: 1px solid var(--border);
}
.header-inner{
  display:flex; align-items:center; justify-content: space-between;
  gap:16px;
  padding: 14px 0;
}
.brand{
  display:flex; align-items:center; gap:10px;
  font-weight: 800;
}
.brand-mark{
  width: 34px; height: 34px;
  border-radius: 12px;
  display:grid; place-items:center;
  background: color-mix(in oklab, var(--accent) 28%, transparent);
  border: 1px solid var(--border);
}
.brand-name{ font-size: 14px; opacity: .95; }

.nav{ display:none; gap: 10px; align-items:center; }
@media (min-width: 920px){ .nav{ display:flex; } }

.nav-link{
  font-size: 14px;
  color: var(--muted);
  padding: 8px 10px;
  border-radius: 12px;
  transition: background 160ms ease, color 160ms ease;
}
.nav-link:hover{
  background: color-mix(in oklab, var(--text) 6%, transparent);
  color: var(--text);
}
.nav-link[aria-current="page"]{
  color: var(--text);
  background: color-mix(in oklab, var(--accent2) 14%, transparent);
  border: 1px solid color-mix(in oklab, var(--accent2) 18%, var(--border));
}

/* Mobile menu (CSS only) */
.nav-toggle{ display:none; }
.nav-burger{
  width: 44px; height: 44px;
  display:grid; place-items:center;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: color-mix(in oklab, var(--bg) 70%, transparent);
  cursor: pointer;
}
.nav-burger span{
  display:block; width: 18px; height: 2px;
  background: var(--text);
  border-radius: 999px;
  margin: 2px 0;
  opacity: .9;
}
@media (min-width: 920px){
  .nav-burger, .nav-drawer{ display:none !important; }
}
.nav-drawer{
  position:absolute;
  left:0; right:0;
  top: 64px;
  margin: 10px auto 0;
  width: min(var(--container), calc(100% - 40px));
  padding: 10px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--bg) 84%, transparent);
  box-shadow: var(--shadow);
  display:none;
}
.nav-drawer a{
  display:block;
  padding: 12px 12px;
  border-radius: 14px;
  color: var(--muted);
}
.nav-drawer a:hover{
  background: color-mix(in oklab, var(--text) 6%, transparent);
  color: var(--text);
}
.nav-toggle:checked ~ .nav-drawer{ display:block; }

/* ============== HERO ============== */
.hero{
  padding: clamp(60px, 8vw, 110px) 0;
  background:
    radial-gradient(900px 450px at 20% 10%, color-mix(in oklab, var(--accent2) 22%, transparent), transparent 60%),
    radial-gradient(900px 450px at 80% 0%, color-mix(in oklab, var(--accent) 22%, transparent), transparent 55%);
}
.hero-grid{
  display:grid;
  grid-template-columns: 1fr;
  gap: 26px;
  align-items:center;
}
@media (min-width: 980px){
  .hero-grid{ grid-template-columns: 1.2fr 0.8fr; gap: 36px; }
}
.eyebrow{
  margin:0 0 10px;
  color: var(--muted);
  font-weight: 650;
  letter-spacing: .05em;
  font-size: 12px;
  text-transform: uppercase;
}
.hero-title{
  margin:0;
  font-size: clamp(34px, 5vw, 33px);
  line-height: 1.05;
}
.accent{
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
}
.hero-subtitle{
  margin: 14px 0 0;
  color: var(--muted);
  font-size: clamp(16px, 2vw, 18px);
  max-width: 70ch;
}
.hero-cta{
  margin-top: 22px;
  display:flex;
  flex-wrap: wrap;
  gap: 12px;
}
.pills{
  margin-top: 18px;
  display:flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ============== UI COMPONENTS ============== */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap: 10px;
  border-radius: 999px;
  padding: 12px 16px;
  border: 1px solid var(--border);
  font-weight: 750;
  font-size: 14px;
  transition: transform 160ms ease, background 160ms ease, border-color 160ms ease;
  will-change: transform;
}
.btn:hover{ transform: translateY(-1px); }
.btn:active{ transform: translateY(0px); }
.btn-primary{
  background: linear-gradient(135deg,
    color-mix(in oklab, var(--accent) 85%, white),
    color-mix(in oklab, var(--accent2) 65%, white)
  );
  border-color: color-mix(in oklab, var(--accent2) 30%, var(--border));
  color:#0b0c10;
}
.btn-ghost{ background: color-mix(in oklab, var(--bg) 70%, transparent); }

.pill{
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--bg) 72%, transparent);
  padding: 8px 10px;
  border-radius: 999px;
  font-size: 13px;
  color: var(--muted);
}

.card{
  border: 1px solid var(--border);
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px;
}
.card h3{ margin:0 0 10px; }
.card p{ margin:0; color: var(--muted); }
.card p + p{ margin-top: 10px; }

.grid-2, .grid-3{
  display:grid;
  grid-template-columns: 1fr;
  gap: 18px;
}
@media (min-width: 820px){
  .grid-2{ grid-template-columns: 1fr 1fr; }
  .grid-3{ grid-template-columns: repeat(3, 1fr); }
}

.list{
  margin: 10px 0 0;
  padding-left: 18px;
  color: var(--muted);
}
.list li{ margin: 8px 0; }

.kpis{
  display:grid;
  grid-template-columns: 1fr;
  gap: 14px;
}
@media (min-width: 820px){ .kpis{ grid-template-columns: repeat(3, 1fr); } }
.kpi{
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: var(--shadow);
  padding: 20px;
}
.kpi strong{
  display:block;
  font-size: clamp(28px, 4vw, 44px);
  letter-spacing: -0.04em;
}
.kpi span{ color: var(--muted); }

.banner{
  margin-top: 18px;
  border-radius: calc(var(--radius) + 4px);
  border: 1px solid var(--border);
  background:
    linear-gradient(90deg, color-mix(in oklab, var(--accent) 14%, transparent), transparent 60%),
    color-mix(in oklab, var(--bg) 70%, transparent);
  padding: 18px;
  display:flex;
  gap: 14px;
  align-items:center;
  justify-content: space-between;
  flex-wrap: wrap;
}

/* ============== CONTACT ============== */
.contact-item{
  display:grid;
  grid-template-columns: 90px 1fr;
  gap: 10px;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: color-mix(in oklab, var(--bg) 70%, transparent);
  margin-top: 10px;
}
.contact-key{ color: var(--muted); font-size: 13px; }
.contact-value{ font-weight: 800; }

.field{ display:grid; gap: 8px; margin-top: 12px; }
.field span{ color: var(--muted); font-size: 13px; }
.input{
  border-radius: 16px;
  border: 1px solid var(--border);
  padding: 12px 14px;
  background: color-mix(in oklab, var(--bg) 72%, transparent);
  color: var(--text);
}
textarea.input{ resize: vertical; }

/* ============== FOOTER ============== */
.site-footer{
  border-top: 1px solid var(--border);
  padding: 20px 0;
  background: color-mix(in oklab, var(--bg) 86%, transparent);
}
.footer-inner{
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 12px;
}
.small{ font-size: 13px; }
.muted{ color: var(--muted); }