/* =========================================================
   DESIGN 9 — Corporate, bleu marine et bleu acier
   Page de vente « Vos LIVRES, votre SALAIRE »
   Ambiance : document professionnel à présenter en entreprise.
   Structure nette, angles droits, filets fins, chiffres mis en
   avant comme dans un rapport, accent sarcelle pour les boutons.
   Polices : IBM Plex Sans (titres et texte), IBM Plex Mono (repères).
   ========================================================= */
@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@400;500;600;700&family=IBM+Plex+Mono:wght@500&display=swap');

:root{
  --ink:#1A2433;
  --ink-soft:#56627A;
  --navy:#0B2545;
  --navy-2:#13315C;
  --steel:#8DA9C4;
  --steel-light:#EEF4F9;
  --teal:#0E7C7B;
  --teal-dark:#095857;
  --paper:#FFFFFF;
  --paper-2:#F4F6F9;
  --rule:#D8DEE7;
  --wrap:42rem;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}

body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:"IBM Plex Sans",Helvetica,Arial,sans-serif;
  font-size:17.5px;
  line-height:1.68;
  -webkit-font-smoothing:antialiased;
}

.wrap{max-width:var(--wrap);margin:0 auto;padding:0 1.4rem}

h1,h2,h3{font-family:"IBM Plex Sans",Helvetica,Arial,sans-serif;font-weight:700;letter-spacing:-.01em;line-height:1.2}

p{margin:0 0 1.05rem}
b,strong{font-weight:600}
a{color:var(--teal)}

/* ---------- barre collante ---------- */
#bar{
  position:fixed;top:0;left:0;right:0;z-index:40;
  background:var(--navy);
  transform:translateY(-100%);
  transition:transform .25s ease;
  border-bottom:3px solid var(--teal);
}
#bar.on{transform:translateY(0)}
#bar .wrap{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding-top:.55rem;padding-bottom:.55rem}
#bar .t{font-weight:600;font-size:1rem;color:#fff;line-height:1.25}
#bar .t span{display:block;font-family:"IBM Plex Mono",monospace;font-size:.72rem;font-weight:500;color:var(--steel)}
@media(max-width:640px){#bar .t span{display:none}}

/* ---------- hero ---------- */
.hero{
  background:linear-gradient(160deg,var(--navy) 0%,var(--navy-2) 100%);
  color:#E3EAF3;
  padding:4.2rem 0 3.3rem;
  border-bottom:4px solid var(--teal);
}
.hero .kicker{
  font-family:"IBM Plex Mono",monospace;font-weight:500;
  font-size:.74rem;letter-spacing:.06em;text-transform:uppercase;
  color:var(--steel);margin:0 0 1.3rem;text-align:center;
  padding-bottom:1rem;border-bottom:1px solid rgba(141,169,196,.3);
}
.hero h1{
  font-size:clamp(1.8rem,5.2vw,2.45rem);
  margin:0 0 1.2rem;color:#fff;font-weight:600;
  text-align:center;
}
.hero .lede{font-size:1.05rem;color:#C3D0DF;max-width:36rem;margin-left:auto;margin-right:auto;margin-bottom:1.8rem}
.hero .lede b{color:#fff}
.hero img{box-shadow:0 20px 40px rgba(0,0,0,.35)}

.facts{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;
  background:rgba(141,169,196,.3);border:1px solid rgba(141,169,196,.3);
  padding:0;margin:0 0 2.2rem;
}
.facts div{
  background:var(--navy);text-align:left;
  font-size:2rem;font-weight:700;color:#fff;
  line-height:1.05;padding:1rem 1rem .9rem;
}
.facts div em{display:block;font-style:normal;font-size:.74rem;font-weight:500;color:var(--steel);margin-top:.4rem;text-transform:uppercase;letter-spacing:.05em}

.cover{display:block;max-width:250px;width:55%;height:auto;margin:0 auto 2rem;box-shadow:0 18px 40px rgba(0,0,0,.3)}

/* ---------- boutons ---------- */
.cta{
  display:inline-block;background:var(--teal);color:#fff;text-decoration:none;
  font-weight:600;
  font-size:1.05rem;letter-spacing:.01em;
  padding:.9rem 1.8rem;border-radius:4px;
  box-shadow:0 2px 0 var(--teal-dark);
  transition:background .15s ease,transform .15s ease;
}
.cta::after{content:"  →"}
.cta:hover{background:var(--teal-dark)}
.cta:active{transform:translateY(1px)}
.cta.sm{font-size:.88rem;padding:.45rem 1rem}
.cta.sm::after{content:""}
a:focus-visible{outline:3px solid var(--steel);outline-offset:3px}

.cta-note{font-size:.86rem;color:var(--ink-soft);margin:.8rem 0 0}
.hero .cta-note{color:var(--steel)}
.cta-block{text-align:center;margin:2.6rem 0}
.dark .cta-note{color:var(--steel)}

/* ---------- sections ---------- */
section{padding:3.4rem 0}
section.tight{padding-top:1.7rem}
h2{font-size:clamp(1.65rem,4.2vw,2.15rem);margin:0 0 1.4rem;color:var(--navy);padding-left:1rem;border-left:5px solid var(--teal)}
h2[style*="center"]{border-left:0;padding-left:0}
h2 .sub{display:block;font-weight:400;font-size:.5em;color:var(--ink-soft);margin-top:.55rem;line-height:1.5;letter-spacing:0}

.band{background:var(--paper-2);border-top:1px solid var(--rule);border-bottom:1px solid var(--rule)}
.dark{background:var(--navy);color:#D6E0EC}
.dark h2{color:#fff}
.dark h2 .sub{color:var(--steel)}
.dark a{color:#7FD1CF}

/* ---------- extrait du livre ---------- */
.extrait{
  background:#fff;border:1px solid var(--rule);border-top:4px solid var(--navy);
  padding:1.7rem 1.8rem;margin:1.8rem 0;
}
.extrait h3{font-size:1.25rem;color:var(--navy);margin:0 0 .9rem}
.extrait p:last-child{margin-bottom:0}
.extrait p.prat{
  background:var(--steel-light);border-top:1px solid var(--rule);
  margin:1.2rem -1.8rem -1.7rem;padding:1rem 1.8rem;font-weight:600;color:var(--navy);
}

/* ---------- promesses ---------- */
.part{margin:0 0 2.3rem;border:1px solid var(--rule)}
.part h3{
  font-size:1.15rem;color:#fff;background:var(--navy);margin:0;padding:.7rem 1rem;
}
.part ul{list-style:none;margin:0;padding:0}
.part li{
  display:flex;gap:1rem;align-items:baseline;
  padding:.75rem 1rem;border-bottom:1px solid var(--rule);
  font-size:.97rem;line-height:1.55;
}
.part li:nth-child(even){background:var(--paper-2)}
.part li:last-child{border-bottom:0}
.part li .pg{
  flex:0 0 auto;margin-left:auto;
  font-family:"IBM Plex Mono",monospace;font-weight:500;
  font-size:.8rem;color:var(--teal);white-space:nowrap;
}
.part li::before{
  content:"";flex:0 0 auto;width:6px;height:6px;background:var(--teal);transform:translateY(-2px);
}
.part.bonus li .pg{color:var(--navy-2)}
.part.bonus li::before{background:var(--steel)}
.part > ul + ul{border-top:1px solid var(--rule)}

/* ---------- listes ---------- */
.plain{list-style:none;margin:0 0 1.4rem;padding:0}
.plain li{padding:.55rem 0 .55rem 1.8rem;position:relative;border-bottom:1px solid var(--rule)}
.plain li:last-child{border-bottom:0}
.plain li::before{
  content:"✓";position:absolute;left:0;top:.55rem;
  font-weight:700;color:var(--teal);
}
.dark .plain li{border-bottom-color:rgba(141,169,196,.25)}
.dark .plain li::before{color:#7FD1CF}

.lecture{margin:0}
.lecture p[style]{color:var(--navy);margin-top:1.5rem;margin-bottom:.3rem;font-size:1.15rem!important}

/* ---------- offre ---------- */
.offre{
  background:#fff;border:1px solid var(--rule);border-top:6px solid var(--teal);
  padding:2rem 1.8rem;text-align:center;margin:1.8rem 0 0;
  box-shadow:0 10px 30px rgba(11,37,69,.08);
}
.offre p{margin-bottom:.4rem}
.prix{font-weight:700;line-height:1;margin:.5rem 0 .3rem}
.prix .old{font-size:1.8rem;color:var(--ink-soft);font-weight:500;text-decoration:line-through;margin-right:.6rem}
.prix .new{font-size:4.2rem;color:var(--navy)}
.deadline{font-family:"IBM Plex Mono",monospace;font-weight:500;font-size:.9rem;color:var(--teal);margin:.3rem 0 1.3rem}
#compte{display:block;font-family:"IBM Plex Sans",sans-serif;font-size:.86rem;color:var(--ink-soft);font-weight:400;margin-top:.3rem}

/* ---------- questions ---------- */
details{border:1px solid var(--rule);border-bottom:0;padding:0 1rem}
details:last-of-type{border-bottom:1px solid var(--rule)}
details[open]{background:var(--paper-2)}
summary{
  cursor:pointer;list-style:none;padding:.9rem 2rem .9rem 0;position:relative;
  font-weight:600;font-size:1.02rem;color:var(--navy);
}
summary::-webkit-details-marker{display:none}
summary::after{
  content:"";position:absolute;right:.25rem;top:1.2rem;
  width:8px;height:8px;border-right:2px solid var(--teal);border-bottom:2px solid var(--teal);
  transform:rotate(45deg);transition:transform .18s ease;
}
details[open] summary::after{transform:rotate(-135deg);top:1.4rem}
details .ans{padding:0 0 .9rem;color:var(--ink-soft)}
details .ans p:last-child{margin-bottom:0}

/* ---------- ps + pied ---------- */
.ps{padding-top:1.6rem}
.ps .num{font-family:"IBM Plex Mono",monospace;font-weight:500;color:#fff;background:var(--navy);padding:.05rem .45rem;font-size:.95rem}
footer{background:var(--navy);color:#9DB2C8;font-size:.82rem;padding:2.3rem 0;text-align:center;border-top:4px solid var(--teal)}
footer p{margin:0 auto;max-width:34rem}

/* ---------- calcul / leviers ---------- */
.calcul{
  background:var(--steel-light);border:1px solid #CFDCE8;border-left:5px solid var(--navy);
  padding:1.4rem 1.6rem;margin:1.8rem 0;
}
.calcul p:last-child{margin-bottom:0}
.calcul .res{font-weight:700;font-size:1.3rem;color:var(--navy);line-height:1.35}
.calcul .res b{color:var(--teal)}
.dark .calcul{background:rgba(255,255,255,.06);border-color:rgba(141,169,196,.3);border-left-color:#7FD1CF}
.dark .calcul .res{color:#fff}
.dark .calcul .res b{color:#7FD1CF}

.levier{margin:0 0 1rem;padding:1.1rem 1.3rem;border:1px solid rgba(141,169,196,.3);background:rgba(255,255,255,.04)}
.levier h3{font-size:1.1rem;color:var(--navy);margin:0 0 .45rem}
.levier p:last-child{margin-bottom:0}
.dark .levier h3{color:#7FD1CF}

@media(max-width:640px){
  body{font-size:16.5px}
  .facts{grid-template-columns:repeat(2,1fr)}
  .extrait{padding:1.4rem 1.2rem}
  .extrait p.prat{margin:1.1rem -1.2rem -1.4rem;padding:.9rem 1.2rem}
  .part li{padding:.7rem .8rem}
}

@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{transition:none!important}
}