:root{--bg:#fff;--fg:#0a0a0a;--muted:#555;--line:#e4e4e4;--soft:#f5f5f5;--radius:14px;--max:1120px}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:80px}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,Helvetica,Arial,sans-serif;color:var(--fg);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}
img,svg{max-width:100%}
a{color:inherit}
.container{width:min(100% - 2.5rem,var(--max));margin-inline:auto}
.narrow{max-width:780px}
.skip{position:absolute;left:-999px;top:0;background:#000;color:#fff;padding:.6rem 1rem;z-index:100}
.skip:focus{left:0}
:focus-visible{outline:3px solid #0a0a0a;outline-offset:3px}
.section-dark :focus-visible,.site-footer :focus-visible{outline-color:#fff}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;min-height:68px;gap:1rem}
.brand{display:inline-flex;align-items:center;gap:.7rem;text-decoration:none}
.brand-logo{height:30px;width:auto;flex:none;display:block}
.brand-light{color:#fff}
.nav{display:flex;align-items:center;gap:1.6rem}
.nav a{text-decoration:none;font-size:.95rem;font-weight:500}
.nav a:not(.btn):hover{text-decoration:underline;text-underline-offset:6px}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:10px;width:44px;height:44px;cursor:pointer;position:relative}
.nav-toggle span{position:absolute;left:12px;right:12px;height:2px;background:var(--fg);transition:.2s}
.nav-toggle span:first-child{top:16px}.nav-toggle span:last-child{top:25px}
.nav-toggle[aria-expanded=true] span:first-child{top:21px;transform:rotate(45deg)}
.nav-toggle[aria-expanded=true] span:last-child{top:21px;transform:rotate(-45deg)}

/* Buttons */
.btn{display:inline-block;background:var(--fg);color:#fff;border:2px solid var(--fg);padding:.85rem 1.5rem;border-radius:999px;font:inherit;font-weight:600;text-decoration:none;cursor:pointer;transition:.15s}
.btn:hover{background:#fff;color:var(--fg)}
.btn-ghost{background:transparent;color:var(--fg)}
.btn-ghost:hover{background:var(--fg);color:#fff}
.btn-small{padding:.5rem 1.1rem;font-size:.9rem}
.nav .btn:hover{color:var(--fg)}

/* Hero */
.hero{padding:clamp(3rem,8vw,7rem) 0;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.3fr .7fr;gap:2rem;align-items:center}
.eyebrow{text-transform:uppercase;letter-spacing:.18em;font-size:.78rem;font-weight:600;color:var(--muted);margin:0 0 1rem}
h1{font-size:clamp(2.3rem,5.5vw,4.2rem);line-height:1.08;margin:0 0 1.2rem;font-weight:700;letter-spacing:-.02em}
h1 em{font-style:normal;text-decoration:underline;text-decoration-thickness:.06em;text-underline-offset:.15em}
h2{font-size:clamp(1.7rem,3.6vw,2.5rem);line-height:1.15;margin:0 0 1rem;letter-spacing:-.01em}
h3{margin:0 0 .5rem;font-size:1.2rem}
.lead{font-size:1.2rem;color:var(--muted);max-width:56ch;margin:0 0 2rem}
.cta-row{display:flex;gap:.9rem;flex-wrap:wrap}
.hero-art{color:var(--fg);justify-self:center;width:min(100%,220px)}
.hero-art svg{width:100%;height:auto}

/* Sections */
.section{padding:clamp(3.5rem,8vw,6.5rem) 0}
.section-soft{background:var(--soft)}
.section-dark{background:#0a0a0a;color:#fff}
.section-dark .eyebrow,.section-dark .section-head p{color:#bdbdbd}
.section-head{max-width:700px;margin-bottom:2.8rem}
.section-head p:last-child{color:var(--muted);margin:0}
.section-dark .section-head p:last-child{color:#bdbdbd}

/* Cards */
.cards{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:1.25rem}
.card{border:1px solid var(--line);border-radius:var(--radius);padding:1.8rem;background:#fff;transition:.2s}
.card:hover{border-color:var(--fg);transform:translateY(-3px)}
.card-num{display:block;font-size:.85rem;letter-spacing:.2em;color:var(--muted);margin-bottom:1.2rem}
.card p{margin:0;color:var(--muted)}

/* Steps */
.steps{list-style:none;margin:0 0 3rem;padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:1.25rem}
.steps li{border:1px solid #333;border-radius:var(--radius);padding:1.8rem}
.steps p{margin:0;color:#c8c8c8}
.step-num{display:grid;place-items:center;width:40px;height:40px;border-radius:50%;background:#fff;color:#000;font-weight:700;margin-bottom:1rem}
.values{list-style:none;margin:0;padding:2rem 0 0;border-top:1px solid #333;display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem;color:#c8c8c8}
.values strong{display:block;color:#fff;font-size:1.05rem;margin-bottom:.3rem}

/* FAQ */
.faq details{border-bottom:1px solid var(--line);padding:1.1rem 0}
.faq summary{cursor:pointer;font-weight:600;font-size:1.08rem;list-style:none;display:flex;justify-content:space-between;gap:1rem;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:1.6rem;line-height:1;flex:none;transition:transform .2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq p{margin:.8rem 0 0;color:var(--muted);max-width:65ch}

/* Contact */
.contact-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:3rem;align-items:start}
.contact-list{list-style:none;padding:0;margin:2rem 0 0}
.contact-list li{padding:.7rem 0;border-top:1px solid var(--line)}
.contact-list span{display:inline-block;min-width:6rem;font-weight:600}
.form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:clamp(1.3rem,3vw,2.2rem)}
.field{margin-bottom:1.1rem}
.row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
label{display:block;font-weight:600;font-size:.95rem;margin-bottom:.35rem}
label small{font-weight:400;color:var(--muted)}
.req{color:#b00020}
input[type=text],input[type=email],input[type=tel],select,textarea{width:100%;font:inherit;padding:.75rem .9rem;border:1.5px solid #bbb;border-radius:10px;background:#fff;color:var(--fg)}
textarea{resize:vertical}
input:focus,select:focus,textarea:focus{outline:3px solid #0a0a0a;outline-offset:1px;border-color:#0a0a0a}
.field.invalid input,.field.invalid select,.field.invalid textarea{border-color:#b00020}
.error{color:#b00020;font-size:.88rem;margin:.35rem 0 0;font-weight:500}
.check{display:grid;grid-template-columns:auto 1fr;gap:.2rem .7rem;align-items:start}
.check input{width:20px;height:20px;margin-top:.2rem;accent-color:#0a0a0a}
.check label{font-weight:400;font-size:.9rem;margin:0;color:#333}
.check .error{grid-column:2}
.hp{position:absolute;left:-9999px;height:0;overflow:hidden}
.note{font-size:.85rem;color:var(--muted);margin:1rem 0 0}
.success{margin-top:1.2rem;border:2px solid #0a0a0a;border-radius:10px;padding:1rem 1.2rem;background:var(--soft)}
.success p{margin:.2rem 0 0}

/* Footer */
.site-footer{background:#0a0a0a;color:#fff;padding:3.5rem 0 2rem}
.footer-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:3rem}
.footer-title{font-size:1.05rem;margin:0 0 .8rem}
.muted{color:#bdbdbd;font-size:.92rem}
.disclaimer{margin-top:2.5rem;padding-top:1.5rem;border-top:1px solid #333;font-size:.82rem;color:#a8a8a8}
.copy{margin-top:1rem}

/* Responsive */
@media (max-width:900px){
  .hero-grid{grid-template-columns:1fr}
  .hero-art{display:none}
  .cards,.steps,.values{grid-template-columns:1fr 1fr}
  .contact-grid,.footer-grid{grid-template-columns:1fr;gap:2rem}
}
@media (max-width:720px){
  .nav-toggle{display:block}
  .nav{position:absolute;top:100%;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;padding:1rem 1.25rem 1.4rem;gap:1rem;display:none}
  .nav.open{display:flex}
  .nav .btn{text-align:center}
}
@media (max-width:600px){
  .cards,.steps,.values,.row{grid-template-columns:1fr}
  .cta-row .btn{width:100%;text-align:center}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

/* erreur d envoi */
.form-error{border-color:#b00020}

/* Formules */
.badge{display:inline-block;background:var(--fg);color:#fff;font-size:.7rem;letter-spacing:.08em;text-transform:uppercase;font-weight:600;padding:.25rem .65rem;border-radius:999px;vertical-align:middle}
.eyebrow .badge{margin-left:.6rem}
.plans{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);gap:1.25rem;align-items:stretch}
.plan{position:relative;display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1.8rem 1.5rem}
.plan-featured{border:2px solid var(--fg)}
.plan-featured>.badge{position:absolute;top:-.8rem;left:1.5rem}
.plan h3{font-size:1.3rem}
.price{margin:.4rem 0 1.2rem;line-height:1.3}
.price strong{font-size:2rem;letter-spacing:-.02em}
.price small{color:var(--muted);font-size:.9rem}
.plan-list{list-style:none;margin:0 0 1.6rem;padding:0;color:var(--muted);font-size:.95rem;flex:1}
.plan-list li{position:relative;padding:.35rem 0 .35rem 1.3rem}
.plan-list li::before{content:"";position:absolute;left:0;top:.95rem;width:7px;height:7px;background:var(--fg);border-radius:50%}
.plan-list strong{color:var(--fg)}
.plan .btn{text-align:center}
.plans-note{margin:1.6rem 0 0;font-size:.85rem;color:var(--muted)}
@media (max-width:1100px){.plans{grid-template-columns:1fr 1fr}}
@media (max-width:600px){.plans{grid-template-columns:1fr}.plan-featured{margin-top:.6rem}}
.nw{white-space:nowrap}
.price .pre{display:block;min-height:1.3em}
.price .unit{white-space:nowrap}
.price strong{font-size:1.85rem}

/* Blog */
.nav a[aria-current=page]{text-decoration:underline;text-underline-offset:6px}
.section-line{border-top:1px solid var(--line)}
.page-hero{padding-bottom:2rem}
.breadcrumb{font-size:.85rem;color:var(--muted);margin-bottom:1.4rem}
.breadcrumb a{color:var(--muted)}
.posts{grid-template-columns:repeat(3,1fr)}
.post-card{display:flex;flex-direction:column}
.post-card h3{font-size:1.15rem;line-height:1.3}
.post-card h3 a{text-decoration:none}
.post-card h3 a:hover{text-decoration:underline;text-underline-offset:4px}
.post-card p:not(.post-meta){flex:1}
.post-meta{font-size:.85rem;color:var(--muted);margin:0 0 .8rem}
.more{margin-top:1.2rem;font-weight:600;text-decoration:none}
.more:hover{text-decoration:underline;text-underline-offset:4px}
.more-link{margin:2rem 0 0;font-weight:600}
.article{padding-top:2.5rem}
.article-head{margin-bottom:2rem}
.article h1{font-size:clamp(1.9rem,4.2vw,2.8rem);margin-bottom:1rem}
.prose{font-size:1.07rem;line-height:1.75}
.prose h2{font-size:1.5rem;margin:2.4rem 0 .8rem}
.prose h3{font-size:1.2rem;margin:1.6rem 0 .5rem}
.prose p,.prose li{max-width:68ch}
.prose ul,.prose ol{padding-left:1.3rem}
.prose li{margin:.4rem 0}
.prose .lead{font-size:1.2rem;color:#333;max-width:none}
.prose sup{font-size:.7em;line-height:0}
.prose sup a{text-decoration:none;font-weight:600;padding:0 .1em}
.prose a{text-underline-offset:3px}
.checklist{list-style:none;padding:0!important;border:1px solid var(--line);border-radius:var(--radius);padding:1rem 1.2rem!important;background:var(--soft)}
.checklist li{position:relative;padding-left:1.8rem;margin:.5rem 0}
.checklist li::before{content:"";position:absolute;left:0;top:.4em;width:1rem;height:1rem;border:2px solid var(--fg);border-radius:4px}
.callout{border:2px solid var(--fg);border-radius:var(--radius);padding:1rem 1.2rem;margin:0 0 1.6rem;background:#fff;font-size:.98rem}
.sources{margin-top:3rem;padding-top:1.5rem;border-top:1px solid var(--line)}
.sources h2{font-size:1.15rem}
.sources ol{padding-left:1.3rem;font-size:.92rem;color:var(--muted)}
.sources li{margin:.4rem 0;scroll-margin-top:90px}
.sources li:target{background:#f0f0f0}
.sources a{word-break:break-word}
.article-note{font-size:.85rem;color:var(--muted);margin:1.2rem 0 2rem}
.cta-box{display:flex;gap:1.5rem;align-items:center;justify-content:space-between;flex-wrap:wrap;background:#0a0a0a;color:#fff;border-radius:var(--radius);padding:clamp(1.4rem,3vw,2.2rem);margin:2rem 0}
.cta-box h2{font-size:1.4rem;margin:0 0 .4rem;color:#fff}
.cta-box p{margin:0;color:#cfcfcf;max-width:52ch}
.cta-actions{display:flex;gap:.8rem;flex-wrap:wrap}
.btn-invert{background:#fff;color:#0a0a0a;border-color:#fff}
.btn-invert:hover{background:transparent;color:#fff}
.btn-invert-ghost{background:transparent;color:#fff;border-color:#fff}
.btn-invert-ghost:hover{background:#fff;color:#0a0a0a}
.more-posts{margin-top:3rem}
.more-posts h2{font-size:1.3rem}
.more-posts .posts{grid-template-columns:1fr 1fr}
.site-footer .muted a{color:#fff}
@media (max-width:900px){.posts{grid-template-columns:1fr 1fr}}
@media (max-width:600px){.posts,.more-posts .posts{grid-template-columns:1fr}.cta-actions .btn{width:100%;text-align:center}}