:root{
  --blue:#1327e6;
  --blue-dark:#0a1a99;
  --ink:#0b0b12;
  --ink-soft:#4a4a58;
  --paper:#ffffff;
  --mist:#f4f5fb;
  --line:#e3e4ef;
  --accent:#ff5a36;
  --radius:14px;
  --maxw:1180px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink);
  background:var(--paper);
  line-height:1.6;
}
a{color:inherit;}
img{max-width:100%;height:auto;display:block;}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px;}
h1,h2,h3{font-weight:800;line-height:1.15;margin:0 0 .5em;}
h1{font-size:clamp(1.9rem,3.6vw,2.7rem);}
h2{font-size:clamp(1.5rem,2.8vw,2.05rem);}
h3{font-size:1.1rem;}
p{margin:0 0 1em;color:var(--ink-soft);}
.eyebrow{
  display:inline-block;font-size:.75rem;font-weight:700;letter-spacing:.08em;
  text-transform:uppercase;color:var(--blue);background:rgba(19,39,230,.08);
  padding:6px 12px;border-radius:999px;margin-bottom:14px;
}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:14px 26px;border-radius:999px;font-weight:700;font-size:.95rem;
  text-decoration:none;border:2px solid transparent;cursor:pointer;transition:transform .15s ease, box-shadow .15s ease;
}
.btn:hover{transform:translateY(-1px);}
.btn-primary{background:var(--blue);color:#fff;box-shadow:0 10px 24px -8px rgba(19,39,230,.55);}
.btn-primary:hover{box-shadow:0 14px 28px -8px rgba(19,39,230,.65);}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line);}
.btn-ghost:hover{border-color:var(--blue);color:var(--blue);}
.btn-sm{padding:9px 18px;font-size:.82rem;}

/* header */
header{
  position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;justify-content:space-between;padding:16px 0;gap:16px;}
.logo{display:flex;flex-direction:column;line-height:1;text-decoration:none;}
.logo .dvx{font-size:1.6rem;font-weight:900;color:var(--blue);letter-spacing:-.02em;}
.logo .by{font-size:.62rem;color:var(--ink-soft);letter-spacing:.12em;text-transform:uppercase;}
.breadcrumb{display:flex;gap:8px;align-items:center;font-size:.85rem;color:var(--ink-soft);flex-wrap:wrap;}
.breadcrumb a{text-decoration:none;color:var(--ink-soft);}
.breadcrumb a:hover{color:var(--blue);}
.breadcrumb .sep{color:var(--line);}

/* lang toggle */
.lang-toggle{display:inline-flex;border:1px solid var(--line);border-radius:999px;padding:3px;background:var(--mist);flex:none;}
.lang-toggle button{
  border:none;background:transparent;padding:7px 16px;border-radius:999px;font-size:.8rem;font-weight:800;
  letter-spacing:.03em;color:var(--ink-soft);cursor:pointer;
}
.lang-toggle button.active{background:var(--blue);color:#fff;}
.lang-toggle a{
  border:none;background:transparent;padding:7px 16px;border-radius:999px;font-size:.8rem;font-weight:800;
  letter-spacing:.03em;color:var(--ink-soft);cursor:pointer;text-decoration:none;display:inline-block;
}
.lang-toggle a.active{background:var(--blue);color:#fff;}

/* language content blocks */
[data-lang]{display:none;}
[data-lang].lang-active{display:block;}
span[data-lang].lang-active{display:inline;}

section.block{padding:64px 0;}
section.block.tight{padding:44px 0;}
.mist{background:var(--mist);}
.section-head{max-width:680px;margin:0 auto 40px;text-align:center;}
.section-head p{max-width:60ch;margin-inline:auto;}

/* product hero */
.p-hero{padding:44px 0 20px;}
.p-hero-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:44px;align-items:center;}
@media (max-width:900px){ .p-hero-grid{grid-template-columns:1fr;} }
.p-hero-media{background:var(--mist);border:1px solid var(--line);border-radius:20px;overflow:hidden;padding:20px;}
.p-hero-media img{border-radius:8px;}
.p-hero-tag{font-size:.72rem;font-weight:800;text-transform:uppercase;letter-spacing:.08em;color:var(--accent);margin-bottom:6px;display:block;}
.p-hero h1{margin-bottom:.2em;}
.p-hero .subtitle{font-size:1.05rem;color:var(--ink-soft);margin-bottom:18px;}
.badge-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:20px;}
.badge{font-size:.76rem;font-weight:700;color:var(--blue-dark);background:rgba(19,39,230,.08);border-radius:999px;padding:6px 13px;}
.badge.additive{color:#b3241a;background:rgba(255,90,54,.1);}
.p-hero-cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:8px;}

/* gallery */
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;}
@media (max-width:760px){ .gallery{grid-template-columns:repeat(2,1fr);} }
.gallery figure{margin:0;background:var(--mist);border:1px solid var(--line);border-radius:16px;overflow:hidden;}
.gallery figure img{width:100%;}
.gallery figure figcaption{padding:10px 14px;font-size:.78rem;color:var(--ink-soft);font-weight:600;}

/* features */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;}
@media (max-width:760px){ .feat-grid{grid-template-columns:1fr 1fr;} }
.feat-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px;display:flex;gap:12px;align-items:flex-start;box-shadow:0 16px 32px -26px rgba(11,11,18,.3);}
.feat-card .dot{width:8px;height:8px;border-radius:50%;background:var(--blue);margin-top:7px;flex:none;}
.feat-card p{margin:0;font-size:.92rem;font-weight:600;color:var(--ink);}

/* how to use steps */
.steps-list{display:grid;gap:14px;min-width:0;}
.step-row{display:grid;grid-template-columns:auto 1fr;gap:16px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px 18px;min-width:0;}
.step-row .num{width:34px;height:34px;border-radius:50%;background:var(--blue);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;flex:none;}
.step-row h3{margin:0 0 4px;font-size:.98rem;}
.step-row p{margin:0;font-size:.9rem;}
.step-row > div{min-width:0;}

/* how-to layout (image + steps) */
.howto-layout{display:grid;grid-template-columns:.9fr 1.6fr;gap:32px;align-items:start;}
.howto-layout > div{min-width:0;}
@media (max-width:760px){ .howto-layout{grid-template-columns:1fr;} .howto-layout > img{max-width:260px;margin:0 auto;} }

/* warning box */
.warn-box{background:#fff4f2;border:1px solid #ffd7cc;border-radius:14px;padding:18px 20px;}
.warn-box .wtitle{display:flex;gap:8px;align-items:center;font-weight:800;color:#b3241a;margin-bottom:8px;font-size:.9rem;}
.warn-box ul{margin:0;padding-left:18px;color:#7a2a20;font-size:.88rem;}
.warn-box li{margin-bottom:4px;}

/* video */
.video-wrap{position:relative;width:100%;padding-top:56.25%;border-radius:16px;overflow:hidden;background:#000;border:1px solid var(--line);}
.video-wrap iframe{position:absolute;inset:0;width:100%;height:100%;border:0;}

/* category grid */
.cat-prod-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:22px;}
@media (max-width:600px){ .cat-prod-grid{grid-template-columns:1fr;} }
.pcard{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;display:flex;flex-direction:column;box-shadow:0 20px 40px -30px rgba(11,11,18,.25);text-decoration:none;color:inherit;transition:transform .15s ease;}
.pcard:hover{transform:translateY(-3px);}
.pcard .pcard-media{background:var(--mist);padding:22px;}
.pcard .pcard-media img{margin:0 auto;max-height:220px;width:auto;}
.pcard .pcard-body{padding:18px 20px 22px;display:flex;flex-direction:column;gap:8px;flex:1;}
.pcard .tag{font-size:.7rem;font-weight:800;text-transform:uppercase;letter-spacing:.07em;color:var(--accent);}
.pcard h3{font-size:1.02rem;margin:0;}
.pcard p{font-size:.86rem;margin:0;flex:1;}
.pcard .cta{font-size:.85rem;font-weight:700;color:var(--blue);}

/* sub navigation bar (page links, shown under header on every produits page) */
.subnav{background:var(--mist);border-bottom:1px solid var(--line);}
.subnav-inner{display:flex;gap:22px;padding:12px 0;flex-wrap:wrap;align-items:center;font-size:.86rem;}
.subnav a{text-decoration:none;color:var(--ink-soft);font-weight:700;padding:4px 2px;border-bottom:2px solid transparent;}
.subnav a:hover,.subnav a.active{color:var(--blue);border-bottom-color:var(--blue);}
.subnav .sep{color:var(--line);}

/* hub (produits/index.html) category picker */
.hub-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
@media (max-width:760px){ .hub-grid{grid-template-columns:1fr;} }
.hub-card{background:#fff;border:1px solid var(--line);border-radius:20px;overflow:hidden;text-decoration:none;color:inherit;display:flex;flex-direction:column;box-shadow:0 20px 40px -30px rgba(11,11,18,.25);transition:transform .15s ease;}
.hub-card:hover{transform:translateY(-3px);}
.hub-card .hub-media{background:var(--mist);padding:36px;display:flex;align-items:center;justify-content:center;min-height:180px;}
.hub-card .hub-media img{max-height:160px;width:auto;}
.hub-card .hub-body{padding:24px 26px 28px;}
.hub-card h3{margin-bottom:8px;}
.hub-card .cta{font-size:.9rem;font-weight:700;color:var(--blue);margin-top:10px;display:inline-block;}

/* category hero */
.cat-hero{background:radial-gradient(120% 140% at 15% 0%, #1a1440 0%, #0b0b1f 55%, #050509 100%);color:#fff;padding:64px 0;}
.cat-hero .eyebrow{background:rgba(255,255,255,.12);color:#dfe3ff;}
.cat-hero h1{color:#fff;}
.cat-hero p{color:#c7c9de;max-width:60ch;}
.cat-switch{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px;}
.cat-switch a{text-decoration:none;padding:10px 18px;border-radius:999px;font-size:.85rem;font-weight:700;border:1px solid rgba(255,255,255,.3);color:#fff;}
.cat-switch a.active{background:#fff;color:var(--ink);}

.notice-card{background:#fff;border:1px dashed var(--line);border-radius:16px;padding:24px 26px;text-align:center;color:var(--ink-soft);font-size:.92rem;}

/* footer */
footer{background:#0b0b12;color:#c6c8de;padding:52px 0 26px;margin-top:20px;}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:36px;margin-bottom:32px;}
@media (max-width:760px){ .footer-grid{grid-template-columns:1fr;} }
footer h4{color:#fff;font-size:.85rem;text-transform:uppercase;letter-spacing:.06em;margin-bottom:14px;}
footer ul{list-style:none;margin:0;padding:0;display:grid;gap:9px;font-size:.88rem;}
footer a{text-decoration:none;color:#c6c8de;}
footer a:hover{color:#fff;}
.footer-certs{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;}
.footer-certs span{font-size:.72rem;background:rgba(255,255,255,.08);padding:5px 11px;border-radius:999px;}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding-top:20px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:.82rem;color:#8b8ea8;}