/* =========================================================
   iFlexFactures — Thème dark "premium IA" (refonte 2026)
   Inspiré du langage visuel d'ia-forever.fr
   ========================================================= */
@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700&family=Syne:wght@600;700;800&display=swap');

:root{
  --blue:#3b82f6;
  --blue-light:#60a5fa;
  --blue-dim:rgba(59,130,246,.15);
  --green:#22c55e;
  --green-light:#4ade80;
  --green-dim:rgba(34,197,94,.12);
  --bg:#080b12;
  --bg2:#0c1018;
  --card:#0f1520;
  --card-2:#121a28;
  --border:rgba(255,255,255,.07);
  --border-strong:rgba(255,255,255,.14);
  --text:#e8eeff;
  --muted:rgba(232,238,255,.55);
  --faint:rgba(232,238,255,.30);
  --radius:20px;
  --radius-lg:24px;
  --maxw:1100px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"DM Sans",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  color:var(--text);
  background:var(--bg);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
/* halos d'ambiance */
body::before{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(620px 420px at 18% -5%,rgba(59,130,246,.10),transparent 60%),
    radial-gradient(560px 420px at 92% 8%,rgba(34,197,94,.07),transparent 60%),
    radial-gradient(800px 600px at 50% 120%,rgba(59,130,246,.06),transparent 60%);
}

a{color:var(--blue-light);text-decoration:none;transition:color .2s}
a:hover{color:#fff}
img{max-width:100%}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ---------- Typo ---------- */
h1,h2,h3,h4{font-family:"Syne",sans-serif;font-weight:800;line-height:1.1;letter-spacing:-1px;margin:0 0 .6em}
h1{font-size:clamp(2.1rem,5vw,3.6rem)}
h2{font-size:clamp(1.7rem,4vw,2.7rem)}
h3{font-size:1.25rem;letter-spacing:-.4px}
h4{font-size:1.05rem;letter-spacing:-.3px}
p{margin:0 0 1rem;color:var(--muted)}
.lead{font-size:1.18rem;color:var(--muted);font-weight:300;max-width:640px}
.accent{color:var(--blue-light)}
.accent-green{color:var(--green-light)}

.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:.72rem;font-weight:600;text-transform:uppercase;letter-spacing:.22em;
  color:var(--blue-light);margin-bottom:1rem;
}
.eyebrow::before{content:"";width:26px;height:1px;background:var(--blue);opacity:.7}
.eyebrow.green{color:var(--green-light)}
.eyebrow.green::before{background:var(--green)}

/* ---------- Header ---------- */
.header{
  position:sticky;top:0;z-index:60;
  background:rgba(8,11,18,.72);
  backdrop-filter:saturate(160%) blur(14px);
  border-bottom:1px solid var(--border);
}
.header .nav{display:flex;align-items:center;justify-content:space-between;height:70px}
.brand{display:flex;align-items:center;gap:9px;font-family:"Syne",sans-serif;font-weight:800;font-size:.95rem;letter-spacing:-.3px;color:#fff;margin-right:32px;flex:0 0 auto}
.brand:hover{color:#fff}
.brand img{height:34px;width:auto;filter:drop-shadow(0 2px 6px rgba(0,0,0,.4))}
.menu{display:flex;align-items:center;gap:16px;margin-left:auto}
.menu a{color:var(--muted);font-size:.84rem;font-weight:500;position:relative;padding:4px 0;white-space:nowrap}
.menu a:hover{color:#fff}
.menu a.active{color:#fff}
.menu a:not(.cta)::after{
  content:"";position:absolute;left:0;bottom:-3px;width:0;height:2px;
  background:linear-gradient(90deg,var(--blue),var(--green));border-radius:2px;transition:width .25s;
}
.menu a:not(.cta):hover::after,.menu a.active::after{width:100%}

/* boutons */
.cta,.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-family:"DM Sans",sans-serif;font-weight:600;font-size:.9rem;
  letter-spacing:.02em;border-radius:50px;padding:.8rem 1.7rem;
  cursor:pointer;border:1px solid transparent;transition:transform .25s,box-shadow .25s,background .25s,opacity .2s;
  text-align:center;white-space:nowrap;
}
.cta,.btn-primary{
  background:linear-gradient(135deg,var(--blue),#2563eb);color:#fff;
  box-shadow:0 10px 26px rgba(59,130,246,.30);
}
.cta:hover,.btn-primary:hover{color:#fff;transform:translateY(-2px);box-shadow:0 16px 36px rgba(59,130,246,.42)}
.cta svg{width:16px;height:16px;fill:currentColor;transition:transform .25s}
.cta:hover svg{transform:translateX(3px)}
.cta.secondary,.btn-secondary{
  background:rgba(255,255,255,.04);color:var(--text);border:1px solid var(--border-strong);box-shadow:none;
}
.cta.secondary:hover,.btn-secondary:hover{background:rgba(255,255,255,.09);color:#fff;transform:translateY(-2px)}
.cta.green{background:linear-gradient(135deg,var(--green),#16a34a);box-shadow:0 10px 26px rgba(34,197,94,.28)}
.cta.green:hover{box-shadow:0 16px 36px rgba(34,197,94,.4)}
.cta.small{padding:.6rem 1.2rem;font-size:.82rem}

.burger{display:none;flex-direction:column;gap:5px;width:28px;height:24px;justify-content:center;cursor:pointer}
.burger span{display:block;width:26px;height:2px;background:#fff;border-radius:999px;transition:.3s}

/* ---------- Sections ---------- */
section{position:relative}
.section{padding:90px 0}
.section-alt{background:var(--bg2)}
.section-head{max-width:720px;margin-bottom:48px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-head.center .eyebrow{justify-content:center}

/* ---------- Hero ---------- */
.hero{
  position:relative;text-align:center;
  padding:96px 24px 84px;
  display:flex;flex-direction:column;align-items:center;
}
.hero .eyebrow{justify-content:center}
.hero h1{max-width:18ch;margin-inline:auto}
.hero .lead{margin:1.2rem auto 2rem;text-align:center}
.hero-glow{
  position:absolute;top:30%;left:50%;transform:translate(-50%,-50%);
  width:680px;height:440px;max-width:90vw;pointer-events:none;z-index:-1;
  background:radial-gradient(closest-side,rgba(59,130,246,.16),rgba(34,197,94,.06) 55%,transparent 75%);
  filter:blur(8px);
}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;justify-content:center;margin-top:.5rem}
.hero-media{margin:40px auto 0;max-width:300px}
.hero-media video{width:100%;border-radius:var(--radius-lg);border:1px solid var(--border);box-shadow:0 30px 70px rgba(0,0,0,.55)}
.logo-card{display:inline-flex;align-items:center;gap:18px;margin:40px auto 0;padding:22px 32px;background:var(--card);border:1px solid var(--border);border-radius:22px;box-shadow:0 26px 60px rgba(0,0,0,.5)}
.logo-card-txt{text-align:left}
.logo-card .lc-brand{display:block;font-family:"Syne",sans-serif;font-weight:800;font-size:1.55rem;letter-spacing:-.6px;color:#fff;line-height:1}
.logo-card .lc-tag{display:block;font-size:.85rem;color:var(--muted);margin-top:5px}

/* ---------- Cards / grids ---------- */
.grid{display:grid;gap:22px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}

.card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:30px;position:relative;overflow:hidden;
  transition:transform .35s cubic-bezier(.16,1,.3,1),border-color .3s,box-shadow .3s;
}
.card::after{
  content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;opacity:0;transition:opacity .3s;
  background:radial-gradient(420px 200px at 0% 0%,rgba(59,130,246,.14),transparent 60%);
}
.card:hover{transform:translateY(-6px);border-color:var(--border-strong);box-shadow:0 24px 50px rgba(0,0,0,.4)}
.card:hover::after{opacity:1}
.card h3,.card h4{color:#fff}
.card p{margin-bottom:0}
.card .icon{
  width:46px;height:46px;border-radius:13px;display:flex;align-items:center;justify-content:center;
  background:var(--blue-dim);color:var(--blue-light);margin-bottom:18px;
}
.card .icon svg{width:24px;height:24px;fill:currentColor}
.card.green .icon{background:var(--green-dim);color:var(--green-light)}
.card ul{margin:14px 0 0;padding:0;list-style:none}
.card ul li{position:relative;padding:6px 0 6px 26px;color:var(--muted);font-size:.95rem}
.card ul li::before{
  content:"";position:absolute;left:0;top:13px;width:14px;height:9px;
  border-left:2px solid var(--green-light);border-bottom:2px solid var(--green-light);
  transform:rotate(-45deg);
}

/* badge prix */
.price{
  display:inline-flex;align-items:center;gap:6px;margin:16px 0 4px;
  font-weight:700;color:#fff;font-size:1.05rem;
}
.price small{color:var(--muted);font-weight:400;font-size:.8rem}
.card.recommended{border-color:rgba(59,130,246,.55);box-shadow:0 0 0 1px rgba(59,130,246,.25),0 24px 50px rgba(59,130,246,.12)}
.ribbon{
  position:absolute;top:16px;right:-34px;transform:rotate(45deg);
  background:linear-gradient(135deg,var(--blue),var(--green));color:#fff;
  font-size:.66rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;
  padding:5px 40px;box-shadow:0 6px 16px rgba(0,0,0,.4);
}
.note{font-size:.82rem;color:var(--faint);margin-top:14px;font-style:italic}

/* pill / tag */
.pill{
  display:inline-flex;align-items:center;gap:7px;padding:5px 13px;border-radius:50px;
  background:rgba(255,255,255,.05);border:1px solid var(--border);
  font-size:.8rem;color:var(--muted);font-weight:500;
}
.pill .dot{width:7px;height:7px;border-radius:50px;background:var(--green-light);box-shadow:0 0 8px var(--green)}

/* stats */
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.stat{text-align:center;padding:26px 16px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius)}
.stat .num{font-family:"Syne",sans-serif;font-weight:800;font-size:2.4rem;background:linear-gradient(120deg,var(--blue-light),var(--green-light));-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1}
.stat .lbl{color:var(--muted);font-size:.9rem;margin-top:8px}

/* steps */
.steps{display:grid;gap:20px;grid-template-columns:repeat(4,1fr);counter-reset:step}
.step{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:26px 22px;position:relative}
.step::before{
  counter-increment:step;content:counter(step);
  font-family:"Syne",sans-serif;font-weight:800;font-size:1.1rem;
  width:38px;height:38px;border-radius:11px;display:flex;align-items:center;justify-content:center;
  background:var(--blue-dim);color:var(--blue-light);margin-bottom:16px;
}
.step h4{color:#fff;margin-bottom:6px}
.step p{font-size:.92rem;margin:0}

/* ---------- CTA band ---------- */
.cta-band{
  text-align:center;border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:56px 28px;background:
    radial-gradient(600px 240px at 50% 0%,rgba(59,130,246,.16),transparent 60%),var(--card);
  position:relative;overflow:hidden;
}
.cta-band h2{margin-bottom:.5rem}
.cta-band .lead{margin:0 auto 1.6rem}
.cta-band .hero-actions{justify-content:center}

/* ---------- Forms ---------- */
.form-wrap{max-width:760px;margin:0 auto}
.form-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:38px 34px;box-shadow:0 30px 70px rgba(0,0,0,.4);
}
.form-card .form-head{text-align:center;margin-bottom:26px}
.form-card .form-head video{max-width:120px;border-radius:16px;margin:0 auto 14px;display:block;border:1px solid var(--border)}
.form-card h2{margin-bottom:.4rem}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
label{display:block;margin:14px 0 7px;font-size:.86rem;font-weight:600;color:var(--text)}
input,select,textarea{
  width:100%;padding:12px 14px;border-radius:12px;
  background:rgba(255,255,255,.04);border:1px solid var(--border-strong);
  color:var(--text);font-family:inherit;font-size:.95rem;outline:none;transition:border-color .2s,background .2s;
}
input::placeholder,textarea::placeholder{color:var(--faint)}
input:focus,select:focus,textarea:focus{border-color:var(--blue);background:rgba(59,130,246,.06)}
select option{background:#0f1520;color:var(--text)}
form .cta{margin-top:22px;width:100%}

/* ---------- FAQ ---------- */
.faq{max-width:840px;margin:0 auto}
.faq-item{border:1px solid var(--border);border-radius:14px;margin-bottom:12px;background:var(--card);overflow:hidden}
.faq-q{
  width:100%;text-align:left;background:none;border:none;color:#fff;cursor:pointer;
  font-family:"DM Sans",sans-serif;font-weight:600;font-size:1rem;
  padding:18px 22px;display:flex;justify-content:space-between;align-items:center;gap:16px;
}
.faq-q .chev{transition:transform .25s;color:var(--blue-light);flex:0 0 auto;font-size:1.1rem}
.faq-q.open .chev{transform:rotate(90deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;padding:0 22px}
.faq-a.open{max-height:600px;padding-bottom:18px}
.faq-a p{margin:0;color:var(--muted)}

/* ---------- Links list (parcours) ---------- */
.linklist{display:grid;gap:14px}
.linkcard{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  background:var(--card);border:1px solid var(--border);border-radius:14px;padding:18px 22px;
  transition:border-color .25s,transform .25s,background .25s;color:var(--text);
}
.linkcard:hover{border-color:var(--border-strong);transform:translateX(4px);background:var(--card-2);color:#fff}
.linkcard .arrow{color:var(--blue-light);font-size:1.2rem}

/* prose (legal / articles) */
.prose{max-width:780px;margin:0 auto}
.prose p,.prose li{color:var(--muted)}
.prose strong{color:var(--text)}

/* iframe (calendly) */
.embed{border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;background:var(--card);min-height:640px}
.embed iframe{width:100%;height:680px;border:0;display:block}

/* ---------- Footer ---------- */
.footer{border-top:1px solid var(--border);background:var(--bg2);padding:48px 0 30px;margin-top:20px}
.footer-inner{display:flex;flex-wrap:wrap;gap:30px;justify-content:space-between;align-items:flex-start}
.footer .brand{margin-bottom:12px}
.footer-col p,.footer-col a{font-size:.9rem;color:var(--muted);display:block;margin:5px 0}
.footer-col a:hover{color:#fff}
.footer-tag{font-size:.85rem;color:var(--faint);text-align:right}
.footer-bottom{border-top:1px solid var(--border);margin-top:30px;padding-top:18px;text-align:center;color:var(--faint);font-size:.82rem}

/* reveal on scroll */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s cubic-bezier(.16,1,.3,1)}
.reveal.in{opacity:1;transform:none}

/* ---------- Responsive ---------- */
@media(max-width:920px){
  .grid-3,.grid-4,.steps,.stats{grid-template-columns:1fr 1fr}
}
/* Bascule menu → burger dès que la barre devient dense */
@media(max-width:1024px){
  .menu{
    position:fixed;top:70px;left:0;right:0;flex-direction:column;align-items:flex-start;gap:18px;
    background:var(--bg);border-bottom:1px solid var(--border);padding:24px;display:none;margin-left:0;
  }
  .menu.open{display:flex}
  .menu a{font-size:1rem}
  .menu a.cta{width:100%}
  .burger{display:flex}
}
@media(max-width:760px){
  .grid-2,.grid-3,.grid-4,.steps,.stats,.form-row{grid-template-columns:1fr}
  .section{padding:64px 0}
  .hero{padding:64px 20px 56px}
  .footer-inner{flex-direction:column}
  .footer-tag{text-align:left}
}