/* =========================================================
   BILLIONNAIRE ONLINE -- design system partage
   Hub d'affiliation "Gagner de l'argent avec l'IA"
   Theme : sombre, premium, gradient mint/violet/or
   ASCII only. Pas de police externe (self-contained).
   ========================================================= */

:root{
  /* surfaces */
  --bg:#080b13;
  --bg-alt:#0d1220;
  --surface:#111827;
  --surface-2:#161f33;
  --border:#232d47;
  --border-soft:#1a2338;

  /* texte */
  --ink:#eef1f8;
  --ink-soft:#9aa5c3;
  --ink-dim:#5f6b8a;

  /* accents */
  --mint:#5eead4;
  --mint-deep:#22c39a;
  --violet:#8b7cff;
  --violet-deep:#6a5cf0;
  --gold:#f2c14e;

  --grad-brand:linear-gradient(120deg,var(--mint) 0%,var(--violet) 100%);
  --grad-surface:linear-gradient(160deg,var(--surface) 0%,var(--bg-alt) 100%);

  --maxw:1180px;
  --r:18px;
  --r-sm:12px;
  --shadow:0 30px 70px -30px rgba(0,0,0,.6);
  --shadow-soft:0 18px 40px -22px rgba(0,0,0,.5);
  --ease:cubic-bezier(.2,.7,.2,1);
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--sans);
  color:var(--ink);
  background:var(--bg);
  line-height:1.62;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
/* grille de fond discrete */
body{
  background-image:
    radial-gradient(60% 40% at 85% 0%,rgba(139,124,255,.14),transparent 60%),
    radial-gradient(50% 40% at 5% 10%,rgba(94,234,212,.10),transparent 60%);
  background-repeat:no-repeat;
}
img,svg{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-weight:800;line-height:1.12;letter-spacing:-.02em}
p{color:var(--ink-soft)}
ul{list-style:none}
::selection{background:var(--mint);color:#04140f}
::-webkit-scrollbar{width:11px}
::-webkit-scrollbar-track{background:var(--bg-alt)}
::-webkit-scrollbar-thumb{background:#2c3757;border-radius:99px;border:3px solid var(--bg-alt)}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}

/* ---------- boutons ---------- */
.btn{
  position:relative;
  display:inline-flex;align-items:center;justify-content:center;gap:.55rem;
  background:var(--grad-brand);
  color:#04140f;
  padding:1rem 1.8rem;
  border-radius:999px;
  font-weight:700;font-size:.98rem;
  border:none;cursor:pointer;
  transition:.3s var(--ease);
  will-change:transform;
  white-space:nowrap;
}
.btn:hover{transform:translateY(-3px);box-shadow:0 20px 40px -16px rgba(94,234,212,.45)}
.btn.ghost{
  background:transparent;color:var(--ink);border:1.5px solid var(--border);
}
.btn.ghost:hover{border-color:var(--mint);color:var(--mint);box-shadow:none;transform:translateY(-3px)}
.btn.big{padding:1.15rem 2.2rem;font-size:1.05rem}
.btn.block{width:100%}

.eyebrow{
  display:inline-block;
  font-size:.72rem;letter-spacing:.22em;text-transform:uppercase;
  color:var(--mint);font-weight:700;
  margin-bottom:.9rem;
}

/* ---------- icones SVG ---------- */
.icon{
  width:26px;height:26px;stroke:currentColor;fill:none;stroke-width:1.8;
  stroke-linecap:round;stroke-linejoin:round;
}
.icon-box{
  width:56px;height:56px;border-radius:16px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(150deg,rgba(94,234,212,.14),rgba(139,124,255,.12));
  border:1px solid var(--border-soft);
  color:var(--mint);
  margin-bottom:1.1rem;
}

/* ---------- header ---------- */
header.nav{
  position:sticky;top:0;z-index:100;
  background:rgba(8,11,19,.78);
  backdrop-filter:blur(14px) saturate(1.3);
  border-bottom:1px solid var(--border-soft);
}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:72px;gap:20px}
.logo{font-size:1.32rem;font-weight:800;letter-spacing:-.02em}
.logo b{
  background:var(--grad-brand);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
nav.links{display:flex;gap:30px;font-size:.92rem;font-weight:600}
nav.links a{color:var(--ink-soft);transition:.2s;position:relative;padding:4px 0}
nav.links a:hover{color:var(--ink)}
nav.links a::after{content:"";position:absolute;left:0;bottom:-3px;width:0;height:2px;background:var(--grad-brand);transition:.3s var(--ease)}
nav.links a:hover::after{width:100%}
.nav-cta{display:flex;align-items:center;gap:16px}
.lang-mini{font-size:.8rem;color:var(--ink-dim);font-weight:600;border:1px solid var(--border-soft);padding:6px 12px;border-radius:999px;transition:.2s}
.lang-mini:hover{color:var(--mint);border-color:var(--mint)}
.burger{display:none;background:none;border:none;color:var(--ink);font-size:1.6rem;cursor:pointer}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;padding:100px 0 90px}
.hero-bg{
  position:absolute;inset:0;z-index:0;
  background:
    radial-gradient(55% 55% at 80% 10%,rgba(139,124,255,.24),transparent 60%),
    radial-gradient(45% 55% at 10% 90%,rgba(94,234,212,.18),transparent 60%);
}
.hero-in{position:relative;z-index:2;max-width:790px}
.hero h1{font-size:clamp(2.5rem,5.4vw,4.1rem);margin:.3rem 0 1.2rem}
.hero h1 span{
  background:var(--grad-brand);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero p.lead{font-size:1.18rem;color:var(--ink-soft);max-width:56ch;margin-bottom:2.1rem}
.hero .row{display:flex;gap:14px;flex-wrap:wrap}
.trust-row{display:flex;gap:26px;margin-top:2.4rem;flex-wrap:wrap}
.trust-row span{display:flex;align-items:center;gap:.5rem;font-size:.86rem;color:var(--ink-soft)}
.trust-row .dot{width:7px;height:7px;border-radius:50%;background:var(--mint);flex:none}

/* ---------- sections generales ---------- */
section{padding:88px 0;position:relative}
.sec-head{max-width:660px;margin:0 auto 52px;text-align:center}
.sec-head h2{font-size:clamp(2rem,3.6vw,2.7rem);margin:.3rem 0 .9rem}
.sec-head p{font-size:1.05rem}
.sec-alt{background:var(--bg-alt);border-top:1px solid var(--border-soft);border-bottom:1px solid var(--border-soft)}

/* ---------- grille outils (hub) ---------- */
.tool-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.tool-card{
  background:var(--grad-surface);
  border:1px solid var(--border);
  border-radius:var(--r);
  padding:30px 26px;
  display:flex;flex-direction:column;
  transition:.4s var(--ease);
  position:relative;overflow:hidden;
}
.tool-card::before{
  content:"";position:absolute;inset:0;opacity:0;transition:.4s;
  background:radial-gradient(70% 60% at 30% 0%,rgba(94,234,212,.10),transparent 70%);
}
.tool-card:hover{transform:translateY(-8px);border-color:var(--mint);box-shadow:var(--shadow-soft)}
.tool-card:hover::before{opacity:1}
.tool-card h3{font-size:1.24rem;margin-bottom:.5rem}
.tool-card .tagline{font-size:.9rem;color:var(--ink-soft);margin-bottom:1.4rem;flex:1}
.tool-card .go{
  display:inline-flex;align-items:center;gap:.4rem;
  font-size:.86rem;font-weight:700;color:var(--mint);
  transition:.25s;
}
.tool-card:hover .go{gap:.6rem}
.tool-card .kicker{font-size:.68rem;letter-spacing:.14em;text-transform:uppercase;color:var(--violet);font-weight:700;margin-bottom:.5rem}

/* ---------- parcours / steps ---------- */
.steps-line{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;counter-reset:step}
.step{
  background:var(--surface);border:1px solid var(--border-soft);border-radius:var(--r);
  padding:26px 22px;position:relative;
}
.step .num{
  width:38px;height:38px;border-radius:12px;
  background:var(--grad-brand);color:#04140f;font-weight:800;
  display:flex;align-items:center;justify-content:center;margin-bottom:1rem;font-size:1.05rem;
}
.step h3{font-size:1.08rem;margin-bottom:.45rem}
.step p{font-size:.87rem}
.step a{display:inline-block;margin-top:.7rem;font-size:.82rem;font-weight:700;color:var(--mint)}
.step-arrow{display:none}

/* ---------- benefices / grille icones (pages outils) ---------- */
.benefit-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.benefit{
  background:var(--surface);border:1px solid var(--border-soft);border-radius:var(--r);
  padding:28px 24px;transition:.35s var(--ease);
}
.benefit:hover{transform:translateY(-6px);border-color:var(--violet)}
.benefit h3{font-size:1.05rem;margin-bottom:.5rem}
.benefit p{font-size:.88rem}

/* ---------- "comment ca marche" ---------- */
.how-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;position:relative}
.how-step{
  background:var(--grad-surface);border:1px solid var(--border);border-radius:var(--r);
  padding:30px 26px;text-align:left;
}
.how-step .num{
  font-size:.76rem;font-weight:800;letter-spacing:.1em;color:var(--gold);
  margin-bottom:.7rem;
}
.how-step h3{font-size:1.1rem;margin-bottom:.5rem}
.how-step p{font-size:.9rem}

/* ---------- pour qui ---------- */
.who-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.who-card{
  border:1px solid var(--border-soft);border-radius:var(--r-sm);
  padding:22px 20px;background:var(--surface);
  display:flex;gap:14px;align-items:flex-start;
}
.who-card .icon{color:var(--violet);flex:none;margin-top:2px}
.who-card p{font-size:.9rem;color:var(--ink-soft)}

/* ---------- FAQ ---------- */
.faq-list{max-width:760px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{
  background:var(--surface);border:1px solid var(--border-soft);border-radius:var(--r-sm);
  overflow:hidden;
}
.faq-item summary{
  list-style:none;cursor:pointer;padding:20px 24px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-weight:700;font-size:.98rem;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";font-size:1.4rem;color:var(--mint);font-weight:400;transition:.3s var(--ease);flex:none;
}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item .a{padding:0 24px 22px;font-size:.9rem;color:var(--ink-soft)}

/* ---------- CTA blocks ---------- */
.cta-block{
  position:relative;overflow:hidden;
  background:var(--grad-surface);
  border:1px solid var(--border);
  border-radius:28px;padding:64px 50px;text-align:center;
}
.cta-block::before{
  content:"";position:absolute;width:340px;height:340px;border-radius:50%;
  background:radial-gradient(circle,rgba(94,234,212,.16),transparent 70%);
  top:-140px;right:-80px;
}
.cta-block>*{position:relative;z-index:2}
.cta-block h2{font-size:clamp(1.8rem,3vw,2.4rem);margin-bottom:.8rem}
.cta-block p{max-width:52ch;margin:0 auto 1.8rem}

/* ---------- tool hero (page outil) ---------- */
.tool-hero{padding:70px 0 60px}
.back-link{
  display:inline-flex;align-items:center;gap:.4rem;
  font-size:.86rem;font-weight:600;color:var(--ink-soft);
  margin-bottom:26px;transition:.2s;
}
.back-link:hover{color:var(--mint)}
.tool-hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:50px;align-items:center}
.tool-hero h1{font-size:clamp(2.2rem,4.6vw,3.3rem);margin-bottom:1.1rem}
.tool-hero p.lead{font-size:1.12rem;margin-bottom:1.8rem}
.tool-mock{
  aspect-ratio:1/1;border-radius:26px;
  background:var(--grad-surface);border:1px solid var(--border);
  position:relative;overflow:hidden;box-shadow:var(--shadow);
  display:flex;align-items:center;justify-content:center;
}
.tool-mock .glow{
  position:absolute;width:70%;height:70%;border-radius:50%;
  background:radial-gradient(circle,rgba(139,124,255,.32),transparent 70%);
  filter:blur(10px);
}
.tool-mock .icon-big{width:120px;height:120px;stroke-width:1.2;color:var(--mint);position:relative;z-index:2}

/* ---------- email capture ---------- */
.email-block{
  position:relative;overflow:hidden;
  background:var(--grad-surface);
  border:1px solid var(--border);
  border-radius:28px;padding:60px 50px;text-align:center;
}
.email-block::before{
  content:"";position:absolute;width:300px;height:300px;border-radius:50%;
  background:radial-gradient(circle,rgba(139,124,255,.2),transparent 70%);
  bottom:-140px;left:-70px;
}
.email-block>*{position:relative;z-index:2}
.email-block h2{font-size:clamp(1.8rem,3vw,2.4rem);margin-bottom:.7rem}
.email-block p{max-width:50ch;margin:0 auto 1.9rem}
.email-form{display:flex;gap:10px;max-width:470px;margin:0 auto;flex-wrap:wrap}
.email-form input{
  flex:1;min-width:200px;padding:1rem 1.3rem;border-radius:999px;
  border:1.5px solid var(--border);font-size:.95rem;
  background:var(--surface-2);color:var(--ink);
}
.email-form input::placeholder{color:var(--ink-dim)}
.email-form input:focus{outline:none;border-color:var(--mint)}
.form-note{font-size:.76rem;color:var(--ink-dim);margin-top:1rem}
.form-ok{
  display:none;margin-top:16px;font-size:.9rem;color:var(--mint);font-weight:600;
}
.form-ok.show{display:block}

/* ---------- footer ---------- */
footer{background:var(--bg-alt);border-top:1px solid var(--border-soft);padding:64px 0 30px;font-size:.88rem}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:36px;margin-bottom:40px}
.foot-grid h4{color:var(--ink);font-size:1rem;margin-bottom:.8rem}
.foot-grid .logo{margin-bottom:.7rem}
.foot-grid p{max-width:38ch;font-size:.88rem}
.foot-grid a{display:block;color:var(--ink-soft);padding:4px 0;transition:.2s;font-size:.88rem}
.foot-grid a:hover{color:var(--mint)}
.disclosure-box{
  background:var(--surface);border:1px solid var(--border-soft);border-radius:var(--r-sm);
  padding:18px 20px;font-size:.82rem;color:var(--ink-soft);margin-bottom:30px;
  display:flex;gap:12px;align-items:flex-start;
}
.disclosure-box .icon{color:var(--gold);flex:none;margin-top:1px}
.foot-bot{
  border-top:1px solid var(--border-soft);padding-top:22px;
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;
  color:var(--ink-dim);font-size:.8rem;
}
.foot-bot a{color:var(--ink-dim)}
.foot-bot a:hover{color:var(--mint)}

/* ---------- reveal on scroll ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:.7s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media(max-width:980px){
  .tool-hero-grid{grid-template-columns:1fr;gap:36px}
  .tool-mock{max-width:400px;margin:0 auto;width:100%}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:900px){
  nav.links{
    position:fixed;inset:72px 0 auto 0;flex-direction:column;
    background:var(--bg-alt);padding:18px 22px;gap:4px;
    border-bottom:1px solid var(--border-soft);display:none;
  }
  nav.links.show{display:flex}
  nav.links a{padding:12px 0;border-bottom:1px solid var(--border-soft)}
  .burger{display:block}
  .tool-grid,.steps-line,.benefit-grid,.how-grid,.who-grid{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr}
}
@media(max-width:560px){
  .tool-grid,.steps-line,.benefit-grid,.how-grid,.who-grid{grid-template-columns:1fr}
  .cta-block,.email-block{padding:40px 22px}
  .hero{padding:70px 0 60px}
  section{padding:64px 0}
}

/* ---------- selecteur de langue (FR / EN / DE) ---------- */
.langswitch{
  display:flex;align-items:center;gap:2px;
  border:1px solid var(--border-soft);border-radius:999px;
  padding:3px;
}
.langswitch a,.langswitch span{
  font-size:.74rem;font-weight:700;letter-spacing:.03em;
  padding:5px 10px;border-radius:999px;
  color:var(--ink-dim);
  transition:.2s;
}
.langswitch a:hover{color:var(--mint)}
.langswitch span.is-active{
  background:var(--grad-brand);
  color:#04140f;
  cursor:default;
}
.langswitch .sep{display:none}
@media(max-width:560px){
  .langswitch a,.langswitch span{padding:5px 8px;font-size:.7rem}
}