/* SERNIS mockups — WIREFRAME (black & white, low-fidelity) */
:root{
  --ink:#1f1f1f; --muted:#777; --line:#cdcdcd; --line2:#bdbdbd;
  --bg:#f4f4f4; --white:#fff; --box:#e6e6e6; --box2:#dadada;
  --dark:#3a3a3a; --darker:#2a2a2a; --darkest:#1f1f1f;
  --radius:10px; --maxw:1240px;
  /* grayscale aliases so any inline var() references resolve to greys */
  --blue:#333; --blue-600:#222; --navy:#2a2a2a; --amber:#d2d2d2; --red:#444; --green:#555;
}
*{box-sizing:border-box}
html{filter:grayscale(1)} /* safety net: force any remaining color (icons) to grayscale */
body{font-family:"Segoe UI",Inter,system-ui,Arial,sans-serif;color:var(--ink);background:var(--white);line-height:1.55;margin:0}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px}
a{color:inherit;text-decoration:none}
img{max-width:100%}
h1,h2,h3,h4{margin:0;line-height:1.15}
.muted{color:var(--muted)}

/* image / media placeholder look: hatched grey box with an X = "image goes here" */
.ph{
  background:
    linear-gradient(to top right, transparent calc(50% - 1px), var(--line2) 50%, transparent calc(50% + 1px)),
    linear-gradient(to bottom right, transparent calc(50% - 1px), var(--line2) 50%, transparent calc(50% + 1px)),
    var(--box);
  border:1px dashed #9a9a9a;
  color:#555 !important;
}
.ph-rs,.ph-led,.ph-ed,.ph-of,.ph-amber,.ph-prod{ /* all variants collapse to the same wireframe box */
  background:
    linear-gradient(to top right, transparent calc(50% - 1px), var(--line2) 50%, transparent calc(50% + 1px)),
    linear-gradient(to bottom right, transparent calc(50% - 1px), var(--line2) 50%, transparent calc(50% + 1px)),
    var(--box) !important;
}

.pill{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;padding:6px 12px;border-radius:4px;background:#e2e2e2 !important;color:#333 !important;border:1px solid var(--line)}
.btn{display:inline-flex;align-items:center;gap:8px;font-weight:700;padding:13px 22px;border-radius:6px;border:1.5px solid #555;cursor:pointer;font-size:15px;background:#fff;color:#222}
.btn-primary,.btn-amber{background:#2f2f2f !important;color:#fff !important;border-color:#2f2f2f}
/* on dark banner sections, solid buttons flip to white so they stay visible */
.hero .btn-primary,.hero .btn-amber,.band-navy .btn-primary,.band-navy .btn-amber,.app-hero .btn-primary,.app-hero .btn-amber{background:#fff !important;color:#1f1f1f !important;border-color:#fff}
.btn-ghost{background:transparent !important;border-color:rgba(255,255,255,.7);color:#fff !important}
.btn-outline{background:#fff;border-color:#777;color:#222}
.section{padding:70px 0}
.section h2{font-size:30px}
.eyebrow{font-size:13px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:#666}
.grid{display:grid;gap:22px}

/* top bar */
.topbar{background:var(--darkest);color:#cfcfcf;font-size:13px}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;height:38px}
.topbar a{color:#cfcfcf;margin-left:18px}
.topbar .lang b{color:#fff}

/* header / nav */
.header{position:sticky;top:0;z-index:30;background:#fff;border-bottom:1px solid var(--line)}
.header .wrap{display:flex;align-items:center;gap:28px;height:74px}
.logo{font-weight:900;font-size:24px;color:#222;white-space:nowrap}
.logo span{color:#222}
.nav{display:flex;gap:26px;align-items:center;font-weight:600;font-size:15px;color:#444}
.nav .has-caret::after{content:" ▾";color:#999;font-size:11px}
.nav .active{color:#111;text-decoration:underline;text-underline-offset:6px;text-decoration-thickness:2px}
.nav-spacer{flex:1}
.search-mini{display:flex;align-items:center;gap:8px;border:1px solid var(--line);border-radius:6px;padding:8px 12px;color:#9a9a9a;font-size:14px;min-width:180px}
.badge-soft{background:#e2e2e2;color:#333;font-weight:700;font-size:11px;padding:3px 9px;border-radius:4px;margin-left:6px;border:1px solid var(--line)}

/* hero (placeholder banner area) */
.hero{position:relative;color:#fff;overflow:hidden;background:var(--dark);border-bottom:1px solid #2a2a2a}
.hero-bg{position:absolute;inset:0;background:var(--dark)}
.hero-bg::after{content:"";position:absolute;inset:0;background:repeating-linear-gradient(135deg,rgba(255,255,255,.05) 0 2px,transparent 2px 24px)}
.hero .wrap{position:relative;padding:92px 28px}
.hero h1{font-size:52px;max-width:15ch}
.hero p{font-size:19px;color:#dcdcdc;max-width:54ch;margin:20px 0 30px}
.hero .cta{display:flex;gap:14px;flex-wrap:wrap}
.hero .stats{display:flex;gap:40px;margin-top:46px}
.hero .stats b{display:block;font-size:30px}
.hero .stats span{color:#cccccc;font-size:13px}

/* cards */
.cards{display:grid;gap:22px}
.cols-4{grid-template-columns:repeat(4,1fr)}
.cols-3{grid-template-columns:repeat(3,1fr)}
.cols-2{grid-template-columns:repeat(2,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column}
.card .ph{height:160px;display:flex;align-items:flex-end;padding:14px;font-weight:700;font-size:14px}
.card .body{padding:18px}
.card h3{font-size:18px;margin-bottom:6px}
.card p{margin:0;color:var(--muted);font-size:14px}
.card .row{display:flex;justify-content:space-between;align-items:center;margin-top:14px;font-size:13px;font-weight:700;color:#333}
.tag{display:inline-block;background:#eee;color:#555;font-size:12px;font-weight:700;padding:4px 10px;border-radius:4px;margin:0 6px 6px 0;border:1px solid var(--line)}

/* bands */
.band{background:var(--bg)}
.band-navy{background:var(--darker);color:#fff}
.split{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}

/* secondary band */
.secondary-band{background:#ededed;border-top:1px solid var(--line)}
.sec-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.sec-card{background:#fff;border:1px solid var(--line);border-radius:8px;padding:18px;display:flex;gap:14px;align-items:center}
.sec-ico{width:46px;height:46px;border-radius:8px;flex:none;display:flex;align-items:center;justify-content:center;font-size:20px;border:1px dashed #9a9a9a;background:var(--box) !important}

/* footer */
.footer{background:var(--darkest);color:#bdbdbd;font-size:14px;padding:54px 0 30px}
.footer .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px}
.footer h4{color:#fff;font-size:14px;margin-bottom:14px}
.footer a{display:block;color:#bdbdbd;padding:4px 0}
.footer .copy{border-top:1px solid #444;margin-top:34px;padding-top:18px;display:flex;justify-content:space-between;color:#8d8d8d}

/* breadcrumb + catalog */
.crumb{font-size:13px;color:var(--muted);padding:18px 0}
.crumb b{color:var(--ink)}
.catalog{display:grid;grid-template-columns:260px 1fr;gap:34px;align-items:start}
.filters{border:1px solid var(--line);border-radius:8px;padding:18px;position:sticky;top:90px}
.filters h4{font-size:13px;text-transform:uppercase;letter-spacing:.08em;color:#555;margin:16px 0 10px}
.filters h4:first-child{margin-top:0}
.facet{display:flex;align-items:center;gap:9px;font-size:14px;color:#444;padding:5px 0}
.facet input{width:15px;height:15px;accent-color:#555;filter:grayscale(1)}
.facet .n{margin-left:auto;color:#9a9a9a;font-size:12px}
.reset{font-size:13px;color:#333;font-weight:700;margin-top:14px;display:inline-block;text-decoration:underline}
.toolbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px}
.toolbar .count{font-weight:700}
.select{border:1px solid var(--line);border-radius:6px;padding:9px 12px;font-size:14px;color:#444}

/* product detail */
.pdp{display:grid;grid-template-columns:1.05fr 1fr;gap:46px}
.gallery .main{height:380px;border-radius:8px}
.gallery .thumbs{display:flex;gap:12px;margin-top:14px}
.gallery .thumbs div{width:84px;height:64px;border-radius:6px}
.pdp h1{font-size:34px;margin:10px 0}
.spec-table{width:100%;border-collapse:collapse;margin-top:8px}
.spec-table td{padding:11px 4px;border-bottom:1px solid var(--line);font-size:14px}
.spec-table td:first-child{color:var(--muted);width:45%}
.spec-table td:last-child{font-weight:600}
.tabs{display:flex;gap:6px;border-bottom:1px solid var(--line);margin:30px 0 18px}
.tabs div{padding:12px 18px;font-weight:700;font-size:15px;color:#888;border-bottom:3px solid transparent}
.tabs .on{color:#111;border-color:#333}
.dl{display:flex;align-items:center;gap:12px;border:1px solid var(--line);border-radius:8px;padding:14px 16px;margin-top:12px}
.dl .ic{width:38px;height:38px;border-radius:6px;background:#e2e2e2;color:#444;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:12px;border:1px solid var(--line)}

/* applications */
.app-hero{background:var(--dark);color:#fff;padding:58px 0}
.app-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.app-card{border-radius:8px;overflow:hidden;border:1px solid var(--line);background:#fff}
.app-card .pic{height:170px;position:relative;display:flex;align-items:flex-end;padding:16px;font-size:18px;font-weight:800;color:#555}
.app-card .pic span{position:relative;z-index:1}
.app-card .meta{padding:16px;display:flex;justify-content:space-between;align-items:center;font-size:14px}
.app-card .meta b{color:#333 !important}

/* ---- enhanced filtering components (wireframe) ---- */
.filter-search{display:flex;align-items:center;gap:8px;border:1px solid var(--line);border-radius:6px;padding:9px 12px;color:#9a9a9a;font-size:13px;margin-bottom:16px}
.fgroup{border-top:1px solid #e4e4e4;padding:14px 0}
.fgroup:first-of-type{border-top:0;padding-top:0}
.fhead{display:flex;justify-content:space-between;align-items:center;font-size:13px;text-transform:uppercase;letter-spacing:.07em;color:#444;font-weight:800;cursor:pointer}
.fhead .pm{color:#999;font-weight:700}
.chipset{display:flex;flex-wrap:wrap;gap:7px;margin-top:11px}
.chip-sel{border:1px solid #bdbdbd;border-radius:999px;padding:5px 11px;font-size:12.5px;font-weight:700;color:#444;background:#fff}
.chip-sel.on{background:#2f2f2f;color:#fff;border-color:#2f2f2f}
.chip-sel.off{color:#b3b3b3;border-style:dashed} /* 0 results = greyed */
/* range slider mock */
.range{margin:14px 0 6px}
.range .track{position:relative;height:4px;background:#d2d2d2;border-radius:3px}
.range .fill{position:absolute;height:4px;background:#2f2f2f;border-radius:3px}
.range .h{position:absolute;top:-7px;width:18px;height:18px;border-radius:50%;background:#fff;border:2px solid #2f2f2f}
.range-vals{display:flex;justify-content:space-between;font-size:12px;color:#666;margin-top:12px}
/* toggle switch */
.switch{display:flex;align-items:center;justify-content:space-between;font-size:14px;color:#444;padding:6px 0}
.switch .tg{width:38px;height:22px;border-radius:999px;background:#cfcfcf;position:relative;flex:none}
.switch .tg::after{content:"";position:absolute;width:18px;height:18px;border-radius:50%;background:#fff;top:2px;left:2px;box-shadow:0 1px 2px rgba(0,0,0,.3)}
.switch.on .tg{background:#2f2f2f}
.switch.on .tg::after{left:18px}
/* active filter chips bar */
.activebar{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-bottom:16px}
.fchip{display:inline-flex;align-items:center;gap:7px;background:#ededed;border:1px solid var(--line);border-radius:999px;padding:6px 12px;font-size:13px;font-weight:700;color:#333}
.fchip .x{color:#888;font-weight:700}
.clearall{font-size:13px;font-weight:700;color:#333;text-decoration:underline;margin-left:4px}
/* view toggle + compare */
.viewtoggle{display:inline-flex;border:1px solid var(--line);border-radius:6px;overflow:hidden}
.viewtoggle div{padding:8px 12px;font-size:13px;font-weight:700;color:#777}
.viewtoggle .on{background:#2f2f2f;color:#fff}
.card{position:relative}
.cmp{position:absolute;top:10px;right:10px;z-index:2;background:#fff;border:1px solid #bdbdbd;border-radius:5px;font-size:11px;font-weight:700;color:#444;padding:5px 8px;display:flex;align-items:center;gap:6px}
.cmp .bx{width:13px;height:13px;border:1.5px solid #777;border-radius:3px;display:inline-block}
.cmp.on .bx{background:#2f2f2f;border-color:#2f2f2f}
.comparebar{position:sticky;bottom:0;background:#2f2f2f;color:#fff;border-radius:8px;display:flex;justify-content:space-between;align-items:center;padding:14px 20px;margin-top:26px}
.comparebar .btn{padding:9px 16px}
.hintbox{border:1px dashed #b0b0b0;background:#f6f6f6;border-radius:8px;padding:12px 14px;font-size:13px;color:#555;margin-bottom:16px}
.note{max-width:var(--maxw);margin:0 auto;padding:14px 28px;font-size:12px;color:#9a9a9a}
.mock-flag{position:fixed;top:10px;right:10px;z-index:99;background:#111;color:#fff;font-size:11px;font-weight:700;padding:6px 12px;border-radius:4px;letter-spacing:.04em}

/* ---- Proposal B: solutions / process components ---- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;counter-reset:s}
.step{border:1px solid var(--line);border-radius:12px;padding:22px;background:#fff;position:relative}
.step .num{width:44px;height:44px;border-radius:50%;border:2px solid #333;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:18px;margin-bottom:14px}
.step h3{font-size:18px;margin-bottom:6px}
.step p{margin:0;color:var(--muted);font-size:14px}
.bigq{font-size:30px;font-weight:800;line-height:1.25;max-width:20ch}
.proofbar{display:flex;gap:40px;flex-wrap:wrap;border:1px solid var(--line);border-radius:12px;padding:22px 26px}
.proofbar b{display:block;font-size:28px}
.proofbar span{color:var(--muted);font-size:13px}
.challenge{border:1px solid var(--line);border-radius:14px;overflow:hidden;background:#fff;display:flex;flex-direction:column}
.challenge .pic{height:150px}
.challenge .body{padding:18px}
.challenge .body h3{font-size:18px;margin-bottom:6px}
.challenge .body p{margin:0;color:var(--muted);font-size:14px}
.challenge .body .row{display:flex;justify-content:space-between;margin-top:14px;font-weight:700;font-size:13px;color:#333}
.usedchip{display:inline-block;border:1px solid var(--line);background:#f4f4f4;border-radius:6px;padding:5px 10px;font-size:12.5px;font-weight:700;color:#444;margin:0 6px 6px 0}
.tl{position:relative}
.tl::before{content:"";position:absolute;left:10px;top:8px;bottom:8px;width:2px;background:#cdcdcd}
.tl > div{position:relative;padding-left:34px}
.tl .dot{position:absolute;left:2px;top:3px;width:18px;height:18px;border-radius:50%;background:#fff;border:2px solid #333}

/* ======================= RESPONSIVE ======================= */
/* Tablet */
@media (max-width:992px){
  .wrap{padding:0 20px}
  .cols-4{grid-template-columns:repeat(2,1fr)}
  .hero h1{font-size:40px}
  .hero .wrap{padding:72px 20px}
  .catalog{grid-template-columns:1fr;gap:22px}
  .filters{position:static;top:auto}
  .pdp{grid-template-columns:1fr;gap:30px}
  .split{grid-template-columns:1fr;gap:30px}
  .footer .cols{grid-template-columns:repeat(2,1fr)}
  .app-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:1fr 1fr}
  .nav{gap:18px;font-size:14px}
  .section{padding:56px 0}
}
/* Mobile */
@media (max-width:600px){
  /* collapse main nav to a hamburger (drawn on the flex spacer) */
  .nav{display:none}
  .header .search-mini{display:none}
  .nav-spacer{display:flex;justify-content:flex-end;align-items:center}
  .nav-spacer::before{content:"\2261";font-size:30px;line-height:1;color:#333;margin-right:4px}
  .header .wrap{height:60px;gap:14px}
  .logo{font-size:20px}
  .btn{padding:11px 16px;font-size:14px}
  .topbar .wrap{height:auto;padding:7px 0;font-size:11px}
  .topbar .wrap>div:first-child{display:none}

  .cols-4,.cols-3,.cols-2{grid-template-columns:1fr}
  .section{padding:42px 0}
  .section h2{font-size:24px}

  .hero .wrap{padding:52px 20px}
  .hero h1{font-size:31px}
  .hero p{font-size:16px;margin:16px 0 24px}
  .hero .cta{flex-direction:column;align-items:stretch}
  .hero .cta .btn{justify-content:center}
  .hero .stats{flex-wrap:wrap;gap:18px 30px;margin-top:34px}
  .hero .stats b{font-size:24px}

  .split{gap:24px}
  .footer .cols{grid-template-columns:1fr;gap:24px}
  .app-grid{grid-template-columns:1fr}
  .sec-cards{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .proofbar{gap:18px}

  /* product detail */
  .gallery .main{height:240px}
  .pdp h1{font-size:27px}
  .tabs{overflow-x:auto;white-space:nowrap;-webkit-overflow-scrolling:touch}
  .tabs div{padding:11px 14px;font-size:14px}
  .spec-table td{font-size:13px}

  /* catalog / filters become a stacked panel (real build = off-canvas drawer) */
  .toolbar{flex-direction:column;align-items:flex-start;gap:12px}
  .activebar{gap:6px}
  .comparebar{flex-direction:column;align-items:stretch;gap:10px;text-align:center}
  .comparebar>div{justify-content:center}
  .crumb{font-size:12px;padding:14px 0}
  .mock-flag{font-size:10px;padding:5px 9px}
}