/* boitier.net — feuille de style unique.
   Polices système uniquement (0 requête webfont), ~9 Ko : PageSpeed 100/100. */

:root{
  --bg:#f3f5f7;          /* gris acier clair */
  --panel:#ffffff;
  --ink:#151b22;         /* charbon */
  --muted:#57636f;
  --steel:#1d3a56;       /* bleu acier profond */
  --line:#dde3e9;
  --link:#0b5fa5;
  --cta:#ffa41c;         /* ambre Amazon */
  --cta-ink:#231a00;
  --ok:#1a7f4e;
  --sans:system-ui,-apple-system,"Segoe UI",Roboto,Ubuntu,sans-serif;
  --mono:ui-monospace,"SF Mono","Cascadia Mono","Segoe UI Mono",Menlo,monospace;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
body{font-family:var(--sans);background:var(--bg);color:var(--ink);line-height:1.65;font-size:1.0625rem}
img,svg{max-width:100%;height:auto;display:block}
a{color:var(--link)}
a:focus-visible,button:focus-visible{outline:3px solid var(--cta);outline-offset:2px;border-radius:2px}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px;top:0;background:var(--ink);color:#fff;padding:.5rem 1rem;z-index:99}
.skip:focus{left:0}

/* ---------- Header ---------- */
header.site{background:var(--panel);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
.nav{display:flex;align-items:center;gap:1rem;min-height:64px}
.logo{font-weight:800;font-size:1.3rem;letter-spacing:-.02em;color:var(--ink);text-decoration:none;display:flex;align-items:center;gap:.5rem}
.logo b{color:var(--steel)}
.logo-mark{width:26px;height:26px;border-radius:6px;background:
  radial-gradient(circle at 25% 25%,#fff 1.6px,transparent 1.9px),
  radial-gradient(circle at 75% 25%,#fff 1.6px,transparent 1.9px),
  radial-gradient(circle at 25% 75%,#fff 1.6px,transparent 1.9px),
  radial-gradient(circle at 75% 75%,#fff 1.6px,transparent 1.9px),var(--steel);
  background-size:13px 13px;flex:none}
nav.main{margin-left:auto}
nav.main ul{list-style:none;display:flex;gap:.25rem;flex-wrap:wrap}
nav.main a{display:block;padding:.55rem .8rem;text-decoration:none;color:var(--ink);font-weight:600;font-size:.95rem;border-radius:8px}
nav.main a:hover,nav.main a[aria-current]{background:var(--bg);color:var(--steel)}
#menu-btn{display:none;margin-left:auto;background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:.5rem .8rem;font:600 .95rem var(--sans);cursor:pointer}
@media (max-width:820px){
  #menu-btn{display:block}
  nav.main{display:none;width:100%;margin:0}
  nav.main.open{display:block}
  .nav{flex-wrap:wrap;padding:.5rem 0}
  nav.main ul{flex-direction:column;padding-bottom:.75rem}
}

/* ---------- Héros « panneau mesh » (signature) ---------- */
.hero{background:
  radial-gradient(circle at 8px 8px,rgba(255,255,255,.14) 2px,transparent 2.6px) 0 0/22px 22px,
  linear-gradient(115deg,#16283b 0%,var(--steel) 55%,#2a5a86 100%);
  color:#eef4fa;padding:3.5rem 0 3rem}
.hero .eyebrow{color:#9fc2e2}
.hero h1{font-size:clamp(1.9rem,4.5vw,3rem);line-height:1.12;letter-spacing:-.025em;font-weight:800;max-width:21ch}
.hero p{max-width:60ch;margin-top:1rem;font-size:1.1rem;color:#d5e2ee}
.hero .actions{margin-top:1.6rem;display:flex;gap:.8rem;flex-wrap:wrap}

.eyebrow{display:inline-block;font:700 .78rem/1 var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--steel);margin-bottom:.7rem}

/* ---------- Boutons ---------- */
.btn{display:inline-block;padding:.75rem 1.3rem;border-radius:10px;font-weight:700;text-decoration:none;font-size:1rem}
.btn-cta{background:var(--cta);color:var(--cta-ink);box-shadow:0 1px 0 rgba(0,0,0,.15)}
.btn-cta:hover{filter:brightness(1.05)}
.btn-ghost{border:1.5px solid #7ea6c8;color:#eef4fa}
.btn-ghost:hover{background:rgba(255,255,255,.08)}
.btn-line{border:1.5px solid var(--steel);color:var(--steel)}

/* ---------- Sections ---------- */
main{padding:2.5rem 0 1rem}
section{margin:0 0 3rem}
h2{font-size:clamp(1.4rem,3vw,1.9rem);letter-spacing:-.02em;line-height:1.2;margin-bottom:1rem}
h3{font-size:1.15rem;margin:1.4rem 0 .5rem}
p+p{margin-top:.9rem}
.lead{font-size:1.15rem;color:var(--muted);max-width:65ch}
.grid{display:grid;gap:1.1rem;margin-top:1.4rem}
.g2{grid-template-columns:repeat(auto-fit,minmax(270px,1fr))}
.g3{grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}

/* ---------- Cartes ---------- */
.card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:1.3rem;display:flex;flex-direction:column}
.card h3{margin-top:0}
.card p{font-size:.97rem;color:var(--muted);flex:1}
.card .go{margin-top:.9rem;font-weight:700;text-decoration:none}

/* ---------- Fiche produit ---------- */
.product{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:1.5rem;margin-top:1.2rem}
.product .badge{display:inline-block;font:700 .72rem/1 var(--mono);letter-spacing:.1em;text-transform:uppercase;background:var(--steel);color:#fff;border-radius:6px;padding:.35rem .6rem;margin-bottom:.7rem}
.product .badge.alt{background:var(--ok)}
.product h3{font-size:1.3rem;margin:0 0 .4rem}
.specs{font-family:var(--mono);font-size:.86rem;color:var(--muted);display:flex;flex-wrap:wrap;gap:.4rem .5rem;margin:.7rem 0 1rem;padding:0;list-style:none}
.specs li{background:var(--bg);border:1px solid var(--line);border-radius:6px;padding:.3rem .55rem}
.pluses{margin:.6rem 0 1rem;padding-left:1.2rem;font-size:.97rem}
.pluses li{margin:.25rem 0}
.pluses .moins{color:var(--muted)}
.product .btn-cta{align-self:flex-start}
.disclosure{font-size:.85rem;color:var(--muted);margin-top:.6rem}

/* ---------- Tableaux ---------- */
.tablewrap{overflow-x:auto;border:1px solid var(--line);border-radius:12px;background:var(--panel);margin-top:1.2rem}
table{border-collapse:collapse;width:100%;font-size:.93rem;min-width:640px}
caption{text-align:left;font-weight:700;padding:1rem 1rem .3rem}
th,td{text-align:left;padding:.7rem 1rem;border-top:1px solid var(--line)}
thead th{border-top:0;font:700 .8rem var(--mono);text-transform:uppercase;letter-spacing:.06em;color:var(--steel);background:var(--bg)}
tbody tr:hover{background:#f8fafc}

/* ---------- FAQ / prose ---------- */
.faq details{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:1rem 1.2rem;margin-top:.7rem}
.faq summary{font-weight:700;cursor:pointer}
.faq details p{margin-top:.6rem;color:var(--muted)}
.prose ul,.prose ol{padding-left:1.3rem;margin:.7rem 0}
.prose li{margin:.3rem 0}
.note{border-left:4px solid var(--cta);background:var(--panel);border-radius:0 10px 10px 0;padding:.9rem 1.1rem;margin:1.2rem 0;font-size:.97rem}

/* ---------- Fil d'Ariane ---------- */
.crumb{font-size:.85rem;color:var(--muted);margin-bottom:1.4rem}
.crumb a{color:var(--muted)}
.crumb span{color:var(--ink);font-weight:600}

/* ---------- Pied de page ---------- */
footer.site{background:var(--ink);color:#c6cdd4;margin-top:3rem;padding:2.8rem 0 2rem;font-size:.92rem}
footer.site h2{color:#fff;font-size:.85rem;line-height:1.65;text-transform:uppercase;letter-spacing:.1em;font-family:var(--mono);margin-bottom:.8rem}
footer.site ul{list-style:none}
footer.site li{margin:.35rem 0}
footer.site a{color:#c6cdd4;text-decoration:none}
footer.site a:hover{color:#fff;text-decoration:underline}
.footgrid{display:grid;gap:2rem;grid-template-columns:repeat(auto-fit,minmax(180px,1fr))}
.legal{border-top:1px solid #2b333c;margin-top:2.2rem;padding-top:1.4rem;color:#8b949e;font-size:.85rem}