/* ============================================================
   Solden — Design System partagé (aligné sur la landing v2)
   Chargé APRÈS toute feuille inline. Une seule source de vérité
   pour nav, boutons, sections, atmosphère, animations et footer.
   ============================================================ */

:root{
  --white:#ffffff; --paper:#f5f3ff; --ink:#0d1117; --ink-soft:#4b5563; --ink-faint:#6b7280;
  --indigo:#4f46e5; --indigo-dark:#3730a3; --indigo-500:#6366f1; --indigo-300:#a5b4fc; --indigo-100:#e0e7ff; --indigo-050:#eef1ff;
  --rule:#e8e6f2; --rule-soft:#f0eefa;
  --shadow-sm:0 1px 2px rgba(13,17,23,.05), 0 2px 8px rgba(79,70,229,.05);
  --shadow-md:0 4px 12px rgba(13,17,23,.06), 0 14px 40px rgba(79,70,229,.09);
  --shadow-lg:0 8px 24px rgba(13,17,23,.08), 0 30px 80px rgba(79,70,229,.14);
  --serif:'Fraunces',Georgia,serif; --emph:'Instrument Serif',Georgia,serif;
  --sans:'Inter',system-ui,sans-serif; --mono:'JetBrains Mono',ui-monospace,monospace;
  --maxw:1320px; --gutter:clamp(24px,5vw,96px);
  --e-out:cubic-bezier(.16,1,.3,1);
}

/* ---------- reset léger ---------- */
.sds{}
body{background:var(--white);color:var(--ink);font-family:var(--sans);line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:hidden}
::selection{background:var(--indigo-100);color:var(--indigo-dark)}
:focus-visible{outline:2px solid var(--indigo);outline-offset:3px;border-radius:4px}
.sd-wrap{max-width:var(--maxw);margin:0 auto;padding-inline:var(--gutter)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.sd-skip{position:absolute;left:-9999px;top:0;z-index:100;background:var(--indigo);color:#fff;padding:12px 20px;border-radius:0 0 10px 0;font-weight:600;font-size:14px}
.sd-skip:focus{left:0}

/* ---------- atmosphère : grain + mesh ---------- */
.sd-grain{position:relative}
.sd-grain::before{content:"";position:absolute;inset:0;pointer-events:none;z-index:0;opacity:.5;mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.82' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.06'/%3E%3C/svg%3E")}
.sd-mesh{background:
  radial-gradient(60% 55% at 12% 8%, hsla(243,78%,66%,.16) 0, transparent 60%),
  radial-gradient(55% 50% at 88% 2%, hsla(258,72%,70%,.13) 0, transparent 60%),
  radial-gradient(50% 60% at 78% 80%, hsla(230,84%,64%,.10) 0, transparent 55%),
  radial-gradient(45% 50% at 20% 95%, hsla(270,70%,72%,.08) 0, transparent 55%),
  var(--white)}

/* ---------- nav ---------- */
.sd-header{position:sticky;top:0;z-index:60;transition:box-shadow .3s, background .3s}
.sd-header.scrolled{background:rgba(255,255,255,.82);backdrop-filter:saturate(160%) blur(14px);-webkit-backdrop-filter:saturate(160%) blur(14px);box-shadow:0 1px 0 var(--rule)}
.sd-nav{display:flex;align-items:center;justify-content:space-between;height:74px}
.sd-brand{display:inline-flex;align-items:center;gap:0;font-family:var(--serif);font-weight:600;font-size:23px;letter-spacing:-.01em;color:var(--ink);text-decoration:none}
.sd-brand b{color:var(--indigo)}
.sd-mark{width:30px;height:30px;border-radius:8px;background:var(--indigo);color:#fff;font-family:var(--serif);font-weight:700;font-size:19px;line-height:1;display:grid;place-items:center;flex:none;margin-right:11px}
.sd-links{display:flex;gap:34px;align-items:center}
.sd-links a{font-size:15px;font-weight:450;color:var(--ink-soft);transition:color .2s;text-decoration:none}
.sd-links a:hover,.sd-links a.active{color:var(--ink)}
.sd-actions{display:flex;gap:12px;align-items:center}
.sd-burger{display:none;background:none;border:0;cursor:pointer;flex-direction:column;gap:5px;padding:8px}
.sd-burger span{width:22px;height:2px;background:var(--ink);border-radius:2px}

/* ---------- boutons ---------- */
.sd-btn{display:inline-flex;align-items:center;gap:9px;font-family:var(--sans);font-weight:600;font-size:15px;padding:12px 22px;border-radius:11px;cursor:pointer;border:1px solid transparent;transition:transform .2s var(--e-out),box-shadow .2s,background .2s;text-decoration:none;white-space:nowrap}
.sd-btn-primary{background:var(--indigo);color:#fff;box-shadow:0 2px 10px rgba(79,70,229,.28)}
.sd-btn-primary:hover{background:var(--indigo-dark);transform:translateY(-1px);box-shadow:0 8px 22px rgba(79,70,229,.36)}
.sd-btn:active{transform:scale(.98)}
.sd-btn .arw{transition:transform .25s var(--e-out)}
.sd-btn-primary:hover .arw{transform:translateX(4px)}
.sd-btn-ghost{background:transparent;color:var(--ink);border-color:var(--rule)}
.sd-btn-ghost:hover{border-color:var(--indigo-300);background:var(--indigo-050)}
.sd-btn-text{color:var(--ink);font-weight:600;font-size:15px;display:inline-flex;align-items:center;gap:8px;border-bottom:1.5px solid var(--indigo-100);padding-bottom:2px;text-decoration:none}
.sd-btn-text:hover{border-color:var(--indigo)}

/* ---------- sections ---------- */
.sd-section{position:relative;padding:clamp(64px,7vw,108px) 0}
.sd-section.alt{background:var(--paper)}
.sd-kick{font-family:var(--mono);font-size:11.5px;letter-spacing:.15em;text-transform:uppercase;color:var(--indigo);font-weight:500;margin-bottom:18px;display:flex;align-items:center;gap:11px}
.sd-kick::before{content:"";width:26px;height:2px;background:var(--indigo);border-radius:2px}
.sd-h1{font-family:var(--serif);font-weight:500;font-size:clamp(40px,5.6vw,74px);line-height:1.03;letter-spacing:-.025em;color:var(--ink);max-width:15em}
.sd-h2{font-family:var(--serif);font-weight:500;font-size:clamp(30px,3.9vw,50px);line-height:1.06;letter-spacing:-.022em;color:var(--ink);max-width:16em}
.sd-h3{font-family:var(--serif);font-weight:500;font-size:21px;letter-spacing:-.01em;color:var(--ink)}
.sd-em{font-family:var(--emph);font-style:italic;color:var(--indigo);font-weight:400}
.sd-lead{font-size:clamp(16px,1.3vw,18.5px);color:var(--ink-soft);max-width:38em;line-height:1.62}
.sd-lead b{color:var(--ink);font-weight:600}
.sd-hl{color:var(--indigo);font-weight:600}
.sd-sec-head{margin-bottom:clamp(36px,4vw,58px)}

/* ---------- cartes à profondeur ---------- */
.sd-card{background:var(--white);border:1px solid var(--rule);border-radius:18px;padding:28px;box-shadow:var(--shadow-sm);transition:transform .3s var(--e-out),box-shadow .3s,border-color .3s}
.sd-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--indigo-100)}
.sd-card .ci{width:44px;height:44px;border-radius:12px;background:var(--indigo-050);color:var(--indigo);display:grid;place-items:center;margin-bottom:18px}
.sd-card .ci svg{width:22px;height:22px}

/* ---------- CTA final (bloc indigo) ---------- */
.sd-final{position:relative;overflow:hidden;border-radius:26px;padding:clamp(48px,7vw,84px);text-align:center;color:#fff;background:
  radial-gradient(50% 60% at 14% 8%, rgba(255,255,255,.16) 0, transparent 55%),
  radial-gradient(46% 56% at 86% 92%, rgba(199,210,254,.20) 0, transparent 55%),
  linear-gradient(150deg,var(--indigo-dark),var(--indigo) 55%,var(--indigo-500))}
.sd-final .sd-h2{color:#fff;margin:0 auto;max-width:14em}
.sd-final .sd-em{color:#c7d2fe}
.sd-final p{color:rgba(255,255,255,.92);max-width:34em;margin:22px auto 0;font-size:17px}
.sd-final .sd-cta{justify-content:center;margin-top:34px}
.sd-final .sd-btn-primary{background:#fff;color:var(--indigo-dark)}
.sd-final .sd-btn-primary:hover{background:var(--indigo-100)}
.sd-final .sd-btn-ghost{border-color:rgba(255,255,255,.35);color:#fff}
.sd-final .sd-btn-ghost:hover{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.6)}
.sd-cta{display:flex;gap:18px;align-items:center;flex-wrap:wrap}
.sd-tags{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-top:30px}
.sd-tags span{font-family:var(--mono);font-size:11.5px;color:var(--indigo);background:var(--white);border:1px solid var(--indigo-100);border-radius:9px;padding:9px 15px}
.sd-final .sd-tags span{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.34);color:#fff}

/* ---------- footer canonique (identique partout) ---------- */
.sd-footer{background:var(--white);border-top:1px solid var(--rule);padding:64px 0 40px}
.sd-foot-grid{display:flex;justify-content:space-between;flex-wrap:wrap;gap:40px}
.sd-foot-brand-col{max-width:300px}
.sd-foot-brand-col .sd-brand{margin-bottom:14px}
.sd-foot-tag{font-size:14px;color:var(--ink-soft);line-height:1.55;margin:0 0 16px}
.sd-linkedin{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:9px;border:1px solid var(--rule);color:var(--ink-soft);text-decoration:none;transition:color .2s,border-color .2s,background .2s}
.sd-linkedin:hover{color:var(--indigo);border-color:var(--indigo-300);background:var(--indigo-050)}
.sd-linkedin svg{width:18px;height:18px}
.sd-foot-links{display:flex;gap:48px;flex-wrap:wrap}
.sd-foot-col h4{font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-faint);margin-bottom:14px}
.sd-foot-col a{display:block;font-size:14px;color:var(--ink-soft);padding:5px 0;text-decoration:none;transition:color .2s}
.sd-foot-col a:hover{color:var(--indigo)}
.sd-foot-bottom{margin-top:44px;padding-top:24px;border-top:1px solid var(--rule);display:flex;justify-content:space-between;flex-wrap:wrap;gap:14px;font-size:13px;color:var(--ink-faint)}

/* ---------- composants de contenu (pages riches) ---------- */
.sd-breadcrumb{font-family:var(--mono);font-size:10px;text-transform:uppercase;letter-spacing:.08em;color:var(--ink-faint);padding:18px 0 0}
.sd-breadcrumb a{color:inherit;text-decoration:none}
.sd-breadcrumb a:hover{color:var(--indigo)}
.sd-breadcrumb span{margin:0 8px}
.sd-intro{font-size:clamp(17px,1.5vw,20px);line-height:1.6;color:var(--ink-soft);max-width:44em}
.sd-intro b{color:var(--ink);font-weight:600}
.sd-intro+.sd-intro{margin-top:20px}
.sd-prose p{font-size:16px;line-height:1.62;color:var(--ink-soft);max-width:44em;margin-bottom:18px}
.sd-prose p:last-child{margin-bottom:0}
.sd-prose b{color:var(--ink);font-weight:600}

/* stack de valeur (3 arguments cœur) */
.sd-value{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.sd-value .sd-card .vn{width:38px;height:38px;border-radius:10px;background:var(--indigo-050);color:var(--indigo);font-family:var(--mono);font-size:13px;font-weight:500;display:grid;place-items:center;margin-bottom:16px}
.sd-value .sd-card h3{font-family:var(--serif);font-weight:500;font-size:19px;letter-spacing:-.01em;margin-bottom:9px;color:var(--ink)}
.sd-value .sd-card p{font-size:14.5px;color:var(--ink-soft);line-height:1.55}
.sd-value .sd-card p b{color:var(--ink);font-weight:600}
@media(max-width:820px){.sd-value{grid-template-columns:1fr}}

/* grille critères numérotés */
.sd-crit{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin-top:8px}
.sd-crit .sd-card .rn{font-family:var(--mono);font-size:11px;color:var(--indigo);letter-spacing:.06em;display:block;margin-bottom:14px}
.sd-crit .sd-card h3{font-family:var(--serif);font-weight:500;font-size:21px;letter-spacing:-.01em;margin-bottom:9px;color:var(--ink)}
.sd-crit .sd-card p{font-size:14.5px;color:var(--ink-soft);line-height:1.55}

/* tableau comparatif */
.sd-tablewrap{position:relative;border:1px solid var(--rule);border-radius:18px;overflow:hidden;box-shadow:var(--shadow-md);background:var(--white);margin-top:8px}
.sd-table{width:100%;border-collapse:collapse}
.sd-table th,.sd-table td{padding:16px 22px;text-align:left;font-size:14.5px;border-bottom:1px solid var(--rule-soft)}
.sd-table thead th{font-family:var(--mono);font-size:11.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-soft);font-weight:500;background:var(--paper)}
.sd-table thead th.us{color:var(--indigo)}
.sd-table tbody th{color:var(--ink-soft);font-weight:500;font-family:var(--sans)}
.sd-table col.us,.sd-table td.us{background:var(--indigo-050)}
.sd-table td.us{color:var(--ink);font-weight:600}
.sd-table tr:last-child td,.sd-table tr:last-child th{border-bottom:0}
@media(max-width:720px){.sd-tablewrap{overflow-x:auto}.sd-table{min-width:560px}}

/* encart mis en avant */
.sd-note{border:1px solid var(--rule);border-left:3px solid var(--indigo);border-radius:14px;padding:28px 32px;background:var(--white);box-shadow:var(--shadow-sm);max-width:840px;margin-top:36px}
.sd-note .nt{font-family:var(--mono);font-size:10px;text-transform:uppercase;letter-spacing:.12em;color:var(--indigo);margin-bottom:12px}
.sd-note h4{font-family:var(--serif);font-weight:500;font-size:20px;color:var(--ink);margin-bottom:10px;line-height:1.3}
.sd-note p{font-size:15px;color:var(--ink-soft);line-height:1.6;margin:0}

/* stats */
.sd-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:8px}
.sd-stat{background:var(--white);border:1px solid var(--rule);border-radius:16px;padding:34px 30px;box-shadow:var(--shadow-sm)}
.sd-stat .sl{font-family:var(--mono);font-size:10px;text-transform:uppercase;letter-spacing:.1em;color:var(--indigo);margin-bottom:12px}
.sd-stat .sv{font-family:var(--serif);font-weight:500;font-size:clamp(38px,4.6vw,56px);line-height:1;color:var(--ink);letter-spacing:-.03em}
.sd-stat .sv .u{font-family:var(--emph);font-style:italic;color:var(--indigo);font-size:.5em}
@media(max-width:720px){.sd-stats{grid-template-columns:1fr}}

/* bandeau signature */
.sd-sig{text-align:center;padding:clamp(56px,7vw,88px) 0;background:var(--paper)}
.sd-sig p{font-family:var(--emph);font-style:italic;font-size:clamp(24px,3.2vw,40px);line-height:1.3;color:var(--indigo);max-width:24em;margin:0 auto}

/* faq accordéon (details natif) */
.sd-faq{max-width:840px;margin:0 auto}
.sd-faq-item{border-bottom:1px solid var(--rule)}
.sd-faq-item:first-child{border-top:1px solid var(--rule)}
.sd-faq-item summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:20px;padding:22px 4px;font-family:var(--serif);font-weight:500;font-size:clamp(16px,1.7vw,20px);color:var(--ink);letter-spacing:-.01em}
.sd-faq-item summary::-webkit-details-marker{display:none}
.sd-faq-item summary::after{content:"+";font-family:var(--sans);font-weight:400;font-size:26px;color:var(--indigo);transition:transform .3s var(--e-out);flex:none;line-height:1}
.sd-faq-item[open] summary::after{transform:rotate(45deg)}
.sd-faq-item p{font-size:15px;color:var(--ink-soft);line-height:1.6;padding:0 4px 24px;max-width:70ch}

/* section centrée (CTA texte, risque) */
.sd-center{max-width:44em;margin-inline:auto;text-align:center}
.sd-center .sd-kick{justify-content:center}
.sd-center .sd-h2{margin-inline:auto}
.sd-center .sd-lead{margin-inline:auto}

@media(max-width:720px){.sd-crit{grid-template-columns:1fr}}

/* ---------- reveal on scroll ---------- */
.sd-rv{opacity:0;transform:translateY(22px);transition:opacity .7s var(--e-out),transform .7s var(--e-out)}
.sd-rv.in{opacity:1;transform:none}
.sd-d1{transition-delay:.07s}.sd-d2{transition-delay:.14s}.sd-d3{transition-delay:.21s}.sd-d4{transition-delay:.28s}

/* ---------- responsive ---------- */
@media(max-width:960px){
  .sd-links{display:none;position:absolute;top:74px;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;background:rgba(255,255,255,.98);backdrop-filter:saturate(160%) blur(14px);box-shadow:0 12px 30px rgba(13,17,23,.1);border-top:1px solid var(--rule);padding:8px 0}
  .sd-links.open{display:flex}
  .sd-links a{padding:14px var(--gutter);font-size:16px}
  .sd-burger{display:flex}
  .sd-foot-grid{flex-direction:column;gap:32px}
}
@media(max-width:560px){
  .sd-header .sd-btn-primary{display:none}
  .sd-cta{flex-direction:column;align-items:stretch}
  .sd-cta .sd-btn{justify-content:center}
  .sd-foot-links{gap:32px}
}
@media(prefers-reduced-motion:reduce){
  .sd-rv{opacity:1;transform:none}
  *{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;scroll-behavior:auto!important}
}
@media(scripting:none){.sd-rv{opacity:1;transform:none}}