/* =========================================================
   Assistance IA — Feuille de style
   Direction : éditorial / premium (inspiration Apple).
   Monochrome encre & blanc, immenses respirations,
   typographie large, un seul accent sobre.
   ========================================================= */

:root{
  --bg:        #FFFFFF;
  --bg-soft:   #F5F5F3;   /* gris papier très léger */
  --ink:       #0A0A0A;   /* encre quasi noire */
  --ink-2:     #1C1C1E;
  --muted:     #6E6E73;   /* gris texte secondaire (style SF) */
  --line:      #E5E5E2;
  --line-2:    #D6D6D2;
  --accent:    #0066FF;   /* bleu sobre, unique accent */
  --invert-bg: #0A0A0A;
  --invert-mut:#A1A1A6;
  --maxw:      1180px;
  --radius:    18px;
  --font-display:'Sora', system-ui, -apple-system, sans-serif;
  --font-body:'Sora', system-ui, -apple-system, sans-serif;
  --font-serif:'Newsreader', Georgia, serif;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;color-scheme:light}
body{
  background:var(--bg);color:var(--ink);
  font-family:var(--font-body);
  font-size:18px;line-height:1.6;font-weight:400;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  overflow-x:hidden;
  touch-action:manipulation;
  -webkit-tap-highlight-color:rgba(0,102,255,.12);
}
/* Le haut des sections n'est pas masqué par l'en-tête collant */
:where(section[id],[id]){scroll-margin-top:84px}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
::selection{background:var(--accent);color:#fff}

.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 clamp(22px,5vw,48px)}
.container-mid{max-width:820px}

/* ---- Accessibilité ---- */
.skip-link{position:absolute;left:-999px;top:0;z-index:200;background:var(--ink);color:#fff;padding:12px 18px}
.skip-link:focus{left:0}
a:focus-visible,button:focus-visible,summary:focus-visible,
input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--accent);outline-offset:3px;border-radius:4px;
}

/* ---- Boutons ---- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  font-family:var(--font-body);font-weight:500;font-size:1rem;
  padding:.95em 1.7em;border-radius:999px;border:1.5px solid transparent;
  cursor:pointer;line-height:1;white-space:nowrap;
  transition:transform .3s var(--ease), background .25s var(--ease), color .25s var(--ease), border-color .25s var(--ease), opacity .25s;
}
.btn-primary{background:var(--ink);color:#fff}
.btn-primary:hover{transform:scale(1.035);background:var(--accent)}
.btn-text{background:transparent;color:var(--ink);padding-left:.4em;padding-right:.4em}
.btn-text:hover{color:var(--accent)}
.btn-outline{background:transparent;color:var(--ink);border-color:var(--line-2)}
.btn-outline:hover{border-color:var(--ink);transform:scale(1.035)}
.btn-block{width:100%;padding:1.1em}
.btn-nav{background:var(--ink);color:#fff;padding:.7em 1.3em;font-size:.95rem}
.btn-nav:hover{background:var(--accent)}

/* ---- En-tête ---- */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.72);backdrop-filter:saturate(180%) blur(20px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:inline-flex;align-items:center;gap:.6em}
.logo-dot{width:11px;height:11px;border-radius:50%;background:var(--accent);display:inline-block;flex:none}
.logo-text{font-family:var(--font-display);font-weight:600;font-size:1.12rem;letter-spacing:-.01em}
.main-nav{display:flex;align-items:center}
#menu{display:flex;align-items:center;gap:clamp(16px,2.4vw,34px);list-style:none}
#menu a:not(.btn){font-weight:400;font-size:.97rem;color:var(--muted);transition:color .2s}
#menu a:not(.btn):hover{color:var(--ink)}
.nav-toggle{display:none;flex-direction:column;gap:6px;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{width:24px;height:1.5px;background:var(--ink);transition:.3s}

/* ---- Héros ---- */
.hero{padding:clamp(64px,11vw,140px) 0 clamp(48px,7vw,90px)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(32px,5vw,72px);align-items:center}
.hero-visual{position:relative}
.hero-visual img{width:100%;height:auto;max-width:560px;margin-inline:auto}
@media (prefers-reduced-motion:no-preference){
  .hero-visual img{animation:floaty 7s var(--ease) infinite}
}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-14px)}}
.kicker{
  font-size:.8rem;font-weight:500;letter-spacing:.04em;color:var(--muted);
  margin-bottom:1.6rem;text-transform:none;
}
.kicker-dark{color:var(--muted)}
h1{
  font-family:var(--font-display);font-weight:600;
  font-size:clamp(2.9rem,8.2vw,6.4rem);line-height:.98;letter-spacing:-.035em;
  margin-bottom:1.6rem;max-width:14ch;text-wrap:balance;
}
h1 em{font-family:var(--font-serif);font-style:italic;font-weight:400;letter-spacing:-.01em}
.hero-lede{font-size:clamp(1.15rem,2.2vw,1.45rem);color:var(--muted);max-width:600px;font-weight:400;margin-bottom:2.4rem;line-height:1.5}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:18px}
.hero-stats{display:flex;flex-wrap:wrap;gap:clamp(28px,6vw,90px);margin-top:clamp(56px,10vw,120px);padding-top:42px;border-top:1px solid var(--line)}
.stat{display:flex;flex-direction:column;gap:.35rem}
.stat-n{font-family:var(--font-display);font-weight:600;font-size:clamp(1.5rem,3vw,2.1rem);letter-spacing:-.02em}
.stat-l{font-size:.92rem;color:var(--muted);max-width:18ch}

/* ---- Sections ---- */
.section{padding:clamp(70px,12vw,150px) 0}
.section-soft{background:var(--bg-soft)}
.section-invert{background:var(--invert-bg);color:#fff}
.section-head{margin-bottom:clamp(44px,7vw,80px);max-width:760px}
.section-title{
  font-family:var(--font-display);font-weight:600;
  font-size:clamp(2rem,5.2vw,3.6rem);line-height:1.04;letter-spacing:-.03em;
  text-wrap:balance;
}
.kicker-light{color:var(--invert-mut)}

/* ---- Manifeste ---- */
.statement{padding:clamp(72px,12vw,150px) 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.lead-statement{
  font-family:var(--font-serif);font-weight:400;
  font-size:clamp(1.7rem,4.4vw,3rem);line-height:1.22;letter-spacing:-.01em;
}
.lead-statement span{color:var(--muted)}

/* ---- Lignes-bénéfices ---- */
.feature-rows{display:grid;gap:0}
.frow{display:grid;grid-template-columns:64px 72px 1fr;gap:clamp(18px,3vw,48px);padding:clamp(34px,5vw,52px) 0;border-top:1px solid var(--line);align-items:start}
.frow:last-child{border-bottom:1px solid var(--line)}
.frow-idx{font-family:var(--font-display);font-weight:500;font-size:1.05rem;color:var(--muted);padding-top:.5rem}
.frow-ico{display:flex;align-items:flex-start;padding-top:.2rem}
.frow-ico svg{width:44px;height:44px}
.frow-body h3{font-family:var(--font-display);font-weight:600;font-size:clamp(1.4rem,3vw,2rem);letter-spacing:-.02em;margin-bottom:.7rem;max-width:24ch}
.frow-body p{color:var(--muted);font-size:1.1rem;max-width:54ch}

/* ---- Étapes (sur fond sombre) ---- */
.steps{list-style:none;display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.step{padding:clamp(28px,3vw,40px) clamp(22px,2.4vw,34px) clamp(36px,4vw,56px);border-left:1px solid rgba(255,255,255,.14)}
.step:first-child{border-left:0;padding-left:0}
.step-num{font-family:var(--font-display);font-weight:600;font-size:.95rem;color:var(--invert-mut);display:block;margin-bottom:2.4rem}
.step h3{font-family:var(--font-display);font-weight:600;font-size:1.25rem;letter-spacing:-.01em;margin-bottom:.7rem;color:#fff}
.step p{color:var(--invert-mut);font-size:1rem}

/* ---- Offres ---- */
.offers{display:grid;grid-template-columns:1fr 1fr;gap:clamp(20px,3vw,32px)}
.offer{position:relative;background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:clamp(32px,4vw,48px);display:flex;flex-direction:column;transition:border-color .3s var(--ease), transform .3s var(--ease)}
.offer:hover{border-color:var(--line-2);transform:translateY(-3px)}
.offer-featured{background:var(--ink);color:#fff;border-color:var(--ink)}
.offer-featured .offer-tag{color:var(--invert-mut)}
.offer-featured .ticks li{color:#EDEDED}
.offer-badge{position:absolute;top:clamp(32px,4vw,48px);right:clamp(32px,4vw,48px);font-size:.74rem;font-weight:500;letter-spacing:.04em;color:#fff;background:var(--accent);padding:.4em .9em;border-radius:999px}
.offer h3{font-family:var(--font-display);font-weight:600;font-size:clamp(1.6rem,3vw,2.1rem);letter-spacing:-.02em;margin-bottom:.5rem}
.offer-tag{color:var(--muted);font-size:.92rem;margin-bottom:2rem}
.ticks{list-style:none;margin-bottom:2.2rem;display:grid;gap:1rem}
.ticks li{position:relative;padding-left:1.7em;color:var(--ink-2);font-size:1.02rem;line-height:1.45}
.offer-featured .ticks li{color:#EDEDED}
.ticks li::before{content:"";position:absolute;left:0;top:.55em;width:8px;height:8px;border-radius:50%;background:var(--accent)}
.offer .btn{margin-top:auto;align-self:flex-start}

/* ---- Emplacement photo ---- */
.photo-slot{margin:0 0 clamp(40px,6vw,72px);border-radius:var(--radius);overflow:hidden;background:var(--bg-soft)}
.photo-slot img{width:100%;height:auto;display:block}
.photo-slot figcaption{font-size:.92rem;color:var(--muted);padding:16px 4px 0;text-align:center}

/* ---- Citations ---- */
.quotes{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(20px,3vw,32px)}
.quote{background:var(--bg);border-radius:var(--radius);padding:clamp(28px,3vw,40px)}
.quote p{font-family:var(--font-serif);font-style:italic;font-size:1.3rem;line-height:1.4;margin-bottom:1.4rem;letter-spacing:-.01em}
.quote cite{font-style:normal;font-weight:500;color:var(--accent);font-size:.95rem}

/* ---- FAQ ---- */
.accordion{display:grid;gap:0;border-top:1px solid var(--line)}
.acc-item{border-bottom:1px solid var(--line)}
.acc-item summary{cursor:pointer;list-style:none;padding:28px 0;font-family:var(--font-display);font-weight:500;font-size:clamp(1.05rem,2vw,1.25rem);letter-spacing:-.01em;display:flex;justify-content:space-between;align-items:center;gap:1em}
.acc-item summary::-webkit-details-marker{display:none}
.acc-item summary::after{content:"";width:14px;height:14px;flex:none;background:no-repeat center/contain url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 14 14'%3E%3Cpath d='M7 1v12M1 7h12' stroke='%230A0A0A' stroke-width='1.5'/%3E%3C/svg%3E");transition:transform .3s var(--ease)}
.acc-item[open] summary::after{transform:rotate(135deg)}
.acc-body{padding:0 0 30px;color:var(--muted);max-width:64ch;font-size:1.05rem}

/* ---- CTA ---- */
.cta-inner{max-width:760px}
.cta .section-title{margin-bottom:1rem}
.cta-sub{color:var(--invert-mut);font-size:1.15rem;max-width:52ch;margin-bottom:2.6rem}
.contact-form{display:grid;gap:1.4rem}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:1.4rem}
.field{display:flex;flex-direction:column;gap:.5rem}
.field label{font-size:.9rem;color:var(--invert-mut)}
.field input,.field select,.field textarea{
  width:100%;font-family:var(--font-body);font-size:1rem;color:#fff;
  padding:.9em 1.1em;border:1px solid rgba(255,255,255,.18);border-radius:12px;background:#161618;
  transition:border-color .2s;
}
.field select{color-scheme:dark}
.field input::placeholder,.field textarea::placeholder{color:var(--invert-mut)}
.field input:focus,.field select:focus,.field textarea:focus{border-color:#fff;outline-offset:2px}
.field select option{color:var(--ink);background:#fff}
.field textarea{resize:vertical}
.form-note{margin-top:.4rem;font-weight:500;color:#fff;min-height:1.4em;font-size:.95rem}
.hp-field{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}

/* ---- Pied de page ---- */
.site-footer{background:var(--bg);padding:clamp(56px,8vw,90px) 0 34px;border-top:1px solid var(--line)}
.footer-inner{display:flex;flex-wrap:wrap;justify-content:space-between;gap:34px;padding-bottom:38px;border-bottom:1px solid var(--line)}
.footer-brand{max-width:340px}
.footer-brand .logo{margin-bottom:1rem}
.footer-brand p{color:var(--muted);font-size:.98rem}
.footer-nav{display:flex;flex-wrap:wrap;gap:26px;align-items:flex-start}
.footer-nav a{color:var(--muted);font-size:.97rem;transition:color .2s}
.footer-nav a:hover{color:var(--ink)}
.footer-bottom{padding-top:24px}
.footer-bottom p{color:var(--muted);font-size:.88rem}

/* ---- Apparitions ---- */
@media (prefers-reduced-motion:no-preference){
  .reveal{opacity:0;transform:translateY(22px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
  .reveal.is-visible{opacity:1;transform:none}
}

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width:900px){
  .hero-grid{grid-template-columns:1fr;gap:clamp(28px,6vw,48px)}
  .hero-visual{order:-1;max-width:420px}
  .steps{grid-template-columns:1fr 1fr}
  .step{border-left:0;border-top:1px solid rgba(255,255,255,.14);padding-left:0}
  .step:nth-child(2){padding-left:clamp(22px,2.4vw,34px);border-left:1px solid rgba(255,255,255,.14)}
  .quotes{grid-template-columns:1fr}
}
@media (max-width:760px){
  body{font-size:17px}
  .nav-toggle{display:flex;z-index:120}
  #menu{position:fixed;inset:64px 0 auto 0;background:var(--bg);flex-direction:column;align-items:stretch;gap:0;padding:8px 24px 24px;border-bottom:1px solid var(--line);transform:translateY(-130%);transition:transform .35s var(--ease)}
  #menu.open{transform:translateY(0)}
  #menu li{border-bottom:1px solid var(--line)}
  #menu li:last-child{border-bottom:0;padding-top:14px}
  #menu a:not(.btn){display:block;padding:16px 0;font-size:1.05rem}
  .btn-nav{width:100%}
  .offers,.steps{grid-template-columns:1fr}
  .step:nth-child(2){padding-left:0;border-left:0}
  .frow{grid-template-columns:auto 1fr;grid-template-areas:"idx ico" "body body";gap:14px 16px}
  .frow-idx{grid-area:idx;padding-top:.5rem}
  .frow-ico{grid-ar