/* KoaLab — feuille de style unique */
:root{
  --navy-900:#0F172A; --navy-800:#1E293B; --navy-700:#334155;
  --slate-600:#475569; --slate-500:#64748B; --slate-300:#CBD5E1;
  --slate-200:#E2E8F0; --slate-100:#F1F5F9;
  --paper:#F8FAFC; --white:#FFFFFF;
  --cyan:#38BDF8;         /* fonds sombres uniquement — 2,1:1 sur blanc */
  --link:#0369A1;         /* 5,9:1 sur fond clair, conforme WCAG AA */
  --link-hover:#075985;
  --maxw:1120px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI Variable Display","Segoe UI",Inter,Roboto,"Helvetica Neue",Arial,sans-serif;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}
}
body{margin:0;font-family:var(--font);background:var(--paper);color:var(--navy-800);
  line-height:1.65;font-size:17px;-webkit-font-smoothing:antialiased}
h1,h2,h3{color:var(--navy-900);line-height:1.2;letter-spacing:-.02em;margin:0 0 .5em}
p{margin:0 0 1.1em}
a{color:var(--link);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:var(--link-hover)}
img,svg{max-width:100%}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.skip{position:absolute;left:-9999px;top:0;background:var(--navy-900);color:#fff;
  padding:12px 20px;z-index:100;border-radius:0 0 8px 0}
.skip:focus{left:0}
:focus-visible{outline:3px solid var(--cyan);outline-offset:3px;border-radius:4px}

/* ---------- En-tête ---------- */
.hdr{position:sticky;top:0;z-index:50;background:rgba(15,23,42,.82);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(255,255,255,.08)}
.hdr .wrap{display:flex;align-items:center;justify-content:space-between;height:68px;gap:16px}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none;color:#fff;
  font-weight:650;font-size:19px;letter-spacing:-.01em}
.brand:hover{color:#fff}
.brand .mark{width:32px;height:32px;flex:none}
.nav{display:flex;align-items:center;gap:28px}
.nav a{color:var(--slate-300);text-decoration:none;font-size:15px;font-weight:500;
  transition:color .18s var(--ease)}
.nav a:hover{color:var(--cyan)}
.lang{display:flex;align-items:center;gap:2px;border:1px solid rgba(255,255,255,.18);
  border-radius:999px;padding:3px;font-size:13px;font-weight:600}
.lang a{padding:4px 11px;border-radius:999px;color:var(--slate-300);text-decoration:none;
  transition:.18s var(--ease)}
.lang a[aria-current="true"]{background:var(--cyan);color:var(--navy-900)}
.lang a:not([aria-current="true"]):hover{color:#fff;background:rgba(255,255,255,.09)}
@media(max-width:720px){.nav .nav-link{display:none}.hdr .wrap{height:60px}}

/* ---------- Hero ---------- */
.hero{position:relative;background:var(--navy-900);color:#fff;overflow:hidden;padding:104px 0 116px}
.hero::before{content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(760px 420px at 18% -8%,rgba(56,189,248,.20),transparent 62%),
             radial-gradient(600px 380px at 88% 108%,rgba(2,132,199,.20),transparent 60%)}
.hero::after{content:"";position:absolute;inset:0;pointer-events:none;opacity:.35;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(720px 460px at 30% 20%,#000,transparent 78%);
  mask-image:radial-gradient(720px 460px at 30% 20%,#000,transparent 78%)}
.hero .wrap{position:relative;z-index:1;max-width:860px}
.eyebrow{display:inline-flex;align-items:center;gap:9px;font-size:13px;font-weight:600;
  letter-spacing:.09em;text-transform:uppercase;color:var(--cyan);margin-bottom:26px}
.eyebrow::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--cyan);
  box-shadow:0 0 0 4px rgba(56,189,248,.18)}
.hero h1{color:#fff;font-size:clamp(2.1rem,5.4vw,3.65rem);font-weight:680;
  letter-spacing:-.032em;margin-bottom:24px}
.hero .lede{font-size:clamp(1.05rem,2.1vw,1.28rem);color:var(--slate-300);max-width:660px;
  margin-bottom:38px;line-height:1.6}
.cta-row{display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.btn{display:inline-flex;align-items:center;gap:9px;padding:13px 26px;border-radius:10px;
  font-weight:600;font-size:16px;text-decoration:none;transition:.2s var(--ease);
  border:1px solid transparent}
.btn-primary{background:var(--cyan);color:var(--navy-900)}
.btn-primary:hover{background:#7DD3FC;color:var(--navy-900);transform:translateY(-1px)}
.btn-ghost{border-color:rgba(255,255,255,.22);color:#fff}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan);background:rgba(56,189,248,.07)}
.btn-solid{background:var(--navy-900);color:#fff}
.btn-solid:hover{background:var(--navy-800);color:#fff;transform:translateY(-1px)}

/* ---------- Sections ---------- */
section{padding:88px 0}
.sec-head{max-width:680px;margin-bottom:52px}
.sec-head .kicker{font-size:13px;font-weight:650;letter-spacing:.09em;text-transform:uppercase;
  color:var(--link);margin:0 0 14px}
.sec-head h2{font-size:clamp(1.65rem,3.4vw,2.3rem);font-weight:670}
.sec-head p{color:var(--slate-600);font-size:1.06rem;margin:0}
.tinted{background:var(--white);border-top:1px solid var(--slate-200);
  border-bottom:1px solid var(--slate-200)}

/* Savoir-faire */
.skills{list-style:none;padding:0;margin:0;display:grid;gap:22px;
  grid-template-columns:repeat(auto-fit,minmax(272px,1fr))}
.skills li{position:relative;padding-left:34px;color:var(--slate-600);font-size:1.02rem}
.skills li::before{content:"";position:absolute;left:0;top:.5em;width:19px;height:19px;
  border-radius:6px;background:rgba(3,105,161,.10);
  box-shadow:inset 0 0 0 1.5px rgba(3,105,161,.32)}
.skills li::after{content:"";position:absolute;left:6px;top:.82em;width:7px;height:4px;
  border-left:2px solid var(--link);border-bottom:2px solid var(--link);transform:rotate(-45deg)}
.skills strong{display:block;color:var(--navy-900);font-weight:640;margin-bottom:3px}

/* Cartes */
.cards{display:grid;gap:22px;grid-template-columns:repeat(auto-fit,minmax(285px,1fr))}
.card{background:var(--white);border:1px solid var(--slate-200);border-radius:15px;
  padding:30px 28px;transition:.24s var(--ease);position:relative;overflow:hidden}
.tinted .card{background:var(--paper)}
.card::before{content:"";position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,var(--cyan),var(--link));opacity:0;
  transition:opacity .24s var(--ease)}
.card:hover{border-color:var(--slate-300);transform:translateY(-3px);
  box-shadow:0 14px 34px -18px rgba(15,23,42,.28)}
.card:hover::before{opacity:1}
.card .ico{width:44px;height:44px;border-radius:11px;background:var(--navy-900);
  display:grid;place-items:center;margin-bottom:20px}
.card .ico svg{width:22px;height:22px;stroke:var(--cyan);fill:none;stroke-width:1.7;
  stroke-linecap:round;stroke-linejoin:round}
.card h3{font-size:1.16rem;font-weight:650;margin-bottom:9px}
.card p{color:var(--slate-600);font-size:.985rem;margin:0}
.badge{display:inline-flex;align-items:center;gap:9px;margin-top:38px;padding:9px 17px;
  border:1px solid var(--slate-200);background:var(--white);border-radius:999px;
  font-size:.88rem;color:var(--slate-600);font-weight:500}
.tinted .badge{background:var(--paper)}
.badge .dot{width:7px;height:7px;border-radius:50%;background:var(--link);flex:none;
  animation:pulse 2.6s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.32}}

/* Contact */
.contact-card{background:var(--navy-900);color:#fff;border-radius:20px;padding:56px 48px;
  position:relative;overflow:hidden}
.contact-card::before{content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(560px 300px at 100% 0%,rgba(56,189,248,.19),transparent 62%)}
.contact-card>*{position:relative;z-index:1}
.contact-card h2{color:#fff;font-size:clamp(1.55rem,3.2vw,2.1rem);margin-bottom:14px}
.contact-card p{color:var(--slate-300);max-width:520px}
.contact-meta{display:flex;flex-wrap:wrap;gap:18px 44px;margin:32px 0 34px;padding-top:28px;
  border-top:1px solid rgba(255,255,255,.11)}
.contact-meta dt{color:var(--slate-500);font-size:.78rem;letter-spacing:.07em;
  text-transform:uppercase;font-weight:600;margin-bottom:6px}
.contact-meta dd{margin:0;color:#fff;font-weight:500;font-size:.98rem}
.contact-meta a{color:var(--cyan);text-decoration:none}
.contact-meta a:hover{text-decoration:underline;color:var(--cyan)}
@media(max-width:600px){.contact-card{padding:40px 26px}}

/* ---------- Pied de page ---------- */
.ftr{background:var(--navy-900);color:var(--slate-500);padding:52px 0 40px;font-size:.9rem}
.ftr .wrap{display:flex;flex-wrap:wrap;gap:22px;justify-content:space-between;align-items:center}
.ftr a{color:var(--slate-300);text-decoration:none}
.ftr a:hover{color:var(--cyan);text-decoration:underline}
.ftr nav{display:flex;flex-wrap:wrap;gap:24px}
.ftr .legal{margin:0}

/* ---------- Pages légales ---------- */
.doc{padding:64px 0 88px;background:var(--white);border-bottom:1px solid var(--slate-200)}
.doc .wrap{max-width:760px}
.doc h1{font-size:clamp(1.85rem,4vw,2.5rem);margin-bottom:10px}
.doc .updated{color:var(--slate-500);font-size:.92rem;margin-bottom:44px;padding-bottom:24px;
  border-bottom:1px solid var(--slate-200)}
.doc h2{font-size:1.24rem;font-weight:650;margin:44px 0 12px}
.doc h3{font-size:1.03rem;font-weight:640;margin:26px 0 8px}
.doc p,.doc li{color:var(--slate-600)}
.doc ul{padding-left:22px;margin:0 0 1.1em}
.doc li{margin-bottom:8px}
.doc .back{display:inline-flex;align-items:center;gap:7px;font-size:.94rem;font-weight:550;
  text-decoration:none;margin-bottom:34px;transition:gap .18s var(--ease)}
.doc .back:hover{gap:11px}
.doc .note{background:var(--paper);border-left:3px solid var(--link);padding:18px 22px;
  border-radius:0 10px 10px 0;margin:0 0 1.4em}
.doc .note p:last-child{margin-bottom:0}