/* KapitalSys — feuille unique du site (accueil et pages légales). Clair par défaut, sombre selon le système. */
:root{
  --bg:#FFFFFF;
  --bg-2:#F7F8F8;
  --ink:#0D1414;
  --body:#3D4A48;
  --mute:#6B7775;
  --line:#E7EAE9;
  --teal:#0C8577;
  --teal-soft:rgba(12,133,119,.07);
  --nav-bg:rgba(255,255,255,.86);
  --deep:#0D1414;
  --fill-bg:rgba(217,119,6,.10);
  --fill-ink:#B45309;
  --shadow:0 12px 32px rgba(13,20,20,.10);
  --brand-teal:#14B8A6;
  --brand-orange:#F97316;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){
  :root{
    --bg:#0B1211;
    --bg-2:#111B1A;
    --ink:#EEF2F1;
    --body:#B7C3C1;
    --mute:#8A9795;
    --line:#1F2C2A;
    --teal:#2BB5A3;
    --teal-soft:rgba(43,181,163,.12);
    --nav-bg:rgba(11,18,17,.86);
    --deep:#111B1A;
    --fill-bg:rgba(245,158,11,.12);
    --fill-ink:#F59E0B;
    --shadow:0 12px 32px rgba(0,0,0,.45);
    color-scheme:dark;
  }
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg);color:var(--body);
  font-family:'Inter',system-ui,sans-serif;font-weight:450;font-size:16px;
  line-height:1.65;-webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;overflow-x:hidden;
}
.wrap{max-width:1080px;margin:0 auto;padding:0 32px}
.wrap.narrow{max-width:760px}
h1,h2,h3{font-family:'Space Grotesk',system-ui,sans-serif;color:var(--ink)}
a{color:inherit}
:focus-visible{outline:2px solid var(--teal);outline-offset:3px;border-radius:2px}
::selection{background:var(--teal);color:#fff}

.label{
  font-family:'Inter';font-size:11.5px;font-weight:600;letter-spacing:.14em;
  text-transform:uppercase;color:var(--mute);
}

/* apparition progressive : sans JS, tout reste visible */
.js .rv{opacity:0;transform:translateY(14px);transition:opacity .7s ease,transform .7s ease}
.js .rv.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .rv{opacity:1;transform:none;transition:none}
  *{transition:none!important;animation:none!important;scroll-behavior:auto}
}

/* ---------- navigation ---------- */
nav{
  position:sticky;top:0;z-index:50;
  background:var(--nav-bg);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none}
/* logo officiel (assets/brand) : cadre teal, K à l'encre, point et « Sys » orange */
.brand-name{font-family:'Helvetica Neue',Arial,sans-serif;font-weight:900;font-size:21px;letter-spacing:-.03em;color:var(--ink);line-height:1}
.brand-name .sys{color:var(--brand-orange)}
.logo-mark{flex:none}
.logo-frame{stroke:var(--brand-teal)}
.logo-k{stroke:var(--ink)}
.logo-dot{fill:var(--brand-orange)}
.nav-links{display:flex;align-items:center;gap:32px}
.nav-links a{text-decoration:none;font-size:13.5px;font-weight:500;color:var(--body);transition:color .2s}
.nav-links a:hover{color:var(--ink)}
.nav-right{display:flex;align-items:center;gap:20px}
.nav-cta{
  font-size:13.5px;font-weight:500;text-decoration:none;
  background:var(--ink);color:var(--bg);padding:9px 18px;border-radius:6px;transition:background .2s;
}
.nav-cta:hover{background:var(--teal);color:#fff}
.lang{display:flex;gap:2px}
.lang button{
  background:none;border:0;color:var(--mute);cursor:pointer;
  font-family:'Inter';font-size:12px;font-weight:600;padding:5px 8px;
  letter-spacing:.04em;transition:.2s;border-radius:4px;
}
.lang button.on{color:var(--ink);background:var(--bg-2)}

/* menu mobile (CSS seul, fonctionne sans JS) */
.mnav{display:none;position:relative}
.mnav summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:8px;color:var(--ink)}
.mnav summary::-webkit-details-marker{display:none}
.mnav[open] summary{background:var(--bg-2)}
.mnav-panel{
  position:absolute;right:0;top:calc(100% + 10px);z-index:60;
  background:var(--bg);border:1px solid var(--line);border-radius:12px;
  box-shadow:var(--shadow);padding:8px;min-width:230px;display:grid;
}
.mnav-panel a{padding:13px 16px;text-decoration:none;font-size:15px;font-weight:500;color:var(--ink);border-radius:8px}
.mnav-panel a:hover{background:var(--bg-2)}
.mnav-panel .sep{height:1px;background:var(--line);margin:6px 8px}
.mnav-panel .accent{color:var(--teal)}

/* ---------- accueil ---------- */
header.hero{padding:128px 0 96px;position:relative}
.hero-label{margin-bottom:28px;display:flex;align-items:center;gap:12px}
.hero-label .dot{width:6px;height:6px;border-radius:50%;background:var(--teal)}
.hero h1{
  font-size:clamp(40px,5.4vw,68px);font-weight:500;line-height:1.05;
  letter-spacing:-.035em;max-width:820px;margin-bottom:32px;
}
h1 .accent{color:var(--teal)}
.lede{font-size:19px;line-height:1.7;max-width:620px;margin-bottom:44px;color:var(--body)}
.cta-row{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.btn{
  display:inline-flex;align-items:center;gap:8px;text-decoration:none;
  font-size:14.5px;font-weight:500;padding:13px 24px;border-radius:8px;transition:.2s;
}
.btn-primary{background:var(--ink);color:var(--bg)}
.btn-primary:hover{background:var(--teal);color:#fff;transform:translateY(-1px)}
.btn-ghost{color:var(--ink);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--ink)}
.btn .arr{transition:transform .2s}
.btn:hover .arr{transform:translateX(3px)}

.proof{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--bg-2)}
.proof-in{display:grid;grid-template-columns:repeat(3,1fr);gap:48px;padding:44px 0}
.proof-item .label{margin-bottom:10px;color:var(--teal)}
.proof-item p{font-size:14.5px;line-height:1.6;color:var(--body)}

section{padding:120px 0}
.sec-head{max-width:680px;margin-bottom:72px}
.sec-head .label{margin-bottom:20px;display:block}
h2{font-size:clamp(28px,3.4vw,42px);font-weight:500;letter-spacing:-.03em;line-height:1.12;margin-bottom:18px}
.sub{font-size:17px;color:var(--body)}

.products{display:grid;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:12px;overflow:hidden}
.card{background:var(--bg);padding:52px;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.8fr);gap:56px;transition:background .25s}
.card:hover{background:var(--bg-2)}
.p-top{display:flex;align-items:center;gap:14px;margin-bottom:16px;flex-wrap:wrap}
.p-name{font-family:'Space Grotesk';font-size:24px;font-weight:700;letter-spacing:-.02em;color:var(--ink)}
.badge{font-size:11px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;padding:4px 10px;border-radius:99px}
.b-live{background:var(--teal-soft);color:var(--teal)}
.b-dev{background:var(--bg-2);color:var(--mute);border:1px solid var(--line)}
.p-market{font-size:13px;color:var(--mute);font-weight:500}
.p-body>p{font-size:16.5px;margin-bottom:26px;color:var(--body)}
.p-feats{list-style:none;display:grid;gap:12px}
.p-feats li{font-size:14.5px;color:var(--body);display:flex;gap:12px;align-items:flex-start;line-height:1.55}
.p-feats li svg{flex:none;margin-top:4px}
.p-feats path{stroke:var(--teal)}
.p-link{display:inline-block;margin-top:22px;color:var(--teal);font-weight:500;font-size:14.5px;text-decoration:none}
.p-link:hover{text-decoration:underline}

.dark{background:var(--deep)}
.dark h2,.dark h3{color:#fff}
.dark .label{color:rgba(255,255,255,.5)}
.dark .sub{color:rgba(255,255,255,.68)}
.pillars{display:grid;grid-template-columns:repeat(3,1fr);gap:56px}
.pillar h3{font-size:18px;font-weight:500;letter-spacing:-.01em;margin-bottom:12px}
.pillar p{font-size:15px;color:rgba(255,255,255,.64);line-height:1.65}
.pillar .tick{width:36px;height:2px;background:#14B8A6;margin-bottom:24px}

.about{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);gap:88px;align-items:start}
.about-text .label{display:block;margin-bottom:20px}
.about-text h2{margin-bottom:24px}
.about-text p{font-size:17px;margin-bottom:20px;color:var(--body)}
.mb0{margin-bottom:0!important}
.about-text p strong{color:var(--ink);font-weight:600}

.contact{background:var(--bg-2);border-top:1px solid var(--line)}
.contact-in{text-align:center;max-width:620px;margin:0 auto}
.contact .label{display:block;margin-bottom:20px}
.mail{
  display:inline-block;margin-top:32px;
  font-family:'Space Grotesk';font-size:clamp(20px,2.8vw,28px);font-weight:500;
  letter-spacing:-.01em;color:var(--ink);text-decoration:none;
  border-bottom:2px solid var(--teal);padding-bottom:6px;transition:color .2s;
}
.mail:hover{color:var(--teal)}

/* ---------- fiches (accueil et pages légales) ---------- */
.facts{display:grid;border-top:1px solid var(--line)}
.fact{display:flex;justify-content:space-between;gap:20px;padding:15px 0;border-bottom:1px solid var(--line);font-size:14.5px}
.fk{color:var(--mute);font-weight:500}
.fv{text-align:right;color:var(--ink);font-weight:500}
.box{border:1px solid var(--line);border-radius:12px;background:var(--bg-2);padding:8px 28px;margin:24px 0 8px}
.box .fact:last-child{border-bottom:0}
.box .fk{font-size:12px;letter-spacing:.06em;text-transform:uppercase}

/* ---------- pages légales ---------- */
header.doc{padding:88px 0 44px;border-bottom:1px solid var(--line)}
.eyebrow{margin-bottom:18px;display:flex;align-items:center;gap:12px;color:var(--teal)}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--teal)}
header.doc h1{font-size:clamp(32px,4.4vw,48px);font-weight:500;letter-spacing:-.03em;line-height:1.08;margin-bottom:16px}
.updated{font-size:13.5px;color:var(--mute)}
main.doc{padding:56px 0 104px}
main.doc h2{font-size:22px;font-weight:600;letter-spacing:-.015em;margin:52px 0 14px}
main.doc h2:first-child{margin-top:0}
main.doc h3{font-size:17px;font-weight:600;margin:28px 0 8px}
main.doc p,main.doc li{color:var(--body);font-size:16px}
main.doc p{margin-bottom:16px}
main.doc li{margin-bottom:8px}
main.doc ul{padding-left:22px;margin-bottom:16px}
main.doc a{color:var(--teal)}
.fill{background:var(--fill-bg);color:var(--fill-ink);border:1px dashed currentColor;border-radius:6px;padding:1px 7px;font-size:13px;font-weight:500;white-space:nowrap}

/* ---------- pied de page ---------- */
footer{padding:48px 0;border-top:1px solid var(--line)}
.foot{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;align-items:center}
.foot p{font-size:13px;color:var(--mute)}
.foot-links{display:flex;gap:24px;flex-wrap:wrap}
.foot-links a{font-size:13px;color:var(--mute);text-decoration:none;transition:color .2s}
.foot-links a:hover,.foot-links a[aria-current]{color:var(--ink)}

@media(max-width:900px){
  header.hero{padding:80px 0 64px}
  section{padding:80px 0}
  .proof-in{grid-template-columns:1fr;gap:28px;padding:36px 0}
  .card{grid-template-columns:1fr;gap:24px;padding:32px 24px}
  .pillars{grid-template-columns:1fr;gap:40px}
  .about{grid-template-columns:1fr;gap:44px}
  .nav-links{display:none}
  .mnav{display:block}
  .lang button{padding:12px;font-size:13px}   /* cibles tactiles de 44 px */
  .mail{overflow-wrap:anywhere}
}
@media(max-width:600px){
  .wrap{padding:0 20px}
  .nav-cta{display:none}                      /* présent dans le menu mobile */
  .nav-right{gap:8px}
  .cta-row{width:100%}
  .cta-row .btn{flex:1;justify-content:center;padding:16px 20px}
  .fact{flex-direction:column;gap:4px;padding:14px 0}
  .fv{text-align:left}
  .box{padding:4px 18px}
  header.doc{padding:56px 0 32px}
}