/* =========================================================
   VBM Barrenas México — shared stylesheet for NEW pages
   Replicates the homepage technical-blueprint aesthetic:
   graph-paper bg, IBM Plex Mono labels, green accent.
   (Homepage index.html keeps its own inline CSS untouched.)
   ========================================================= */

:root{
  --ink:#11201c;
  --paper:#f4f3ec;
  --paper-2:#eceae0;
  --line:#c7c5b6;
  --green:#0f7a4f;
  --green-d:#0a5d3b;
  --red:#c2362a;
  --dark:#0f1923;
  --teal:#439a86;
  --gold:#d4a853;
  --mono:'IBM Plex Mono', ui-monospace, monospace;
  --head:'Montserrat', system-ui, sans-serif;
  --body:'Source Sans 3', system-ui, sans-serif;
  --maxw:1180px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--body);
  color:var(--ink);
  background:var(--paper);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

/* blueprint graph-paper background */
.blueprint{
  background-image:
    linear-gradient(rgba(17,32,28,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(17,32,28,.05) 1px, transparent 1px),
    linear-gradient(rgba(17,32,28,.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(17,32,28,.09) 1px, transparent 1px);
  background-size:24px 24px,24px 24px,120px 120px,120px 120px;
}

a{color:var(--green-d);text-decoration:none}
img,svg{display:block;max-width:100%}
h1,h2,h3,h4{font-family:var(--head);line-height:1.14;letter-spacing:-.01em}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}
.mono{font-family:var(--mono)}

/* focus visibility */
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,.btn:focus-visible{
  outline:3px solid var(--green);
  outline-offset:2px;
}
.skip{position:absolute;left:-999px;top:0;background:var(--green);color:#fff;padding:10px 16px;z-index:200}
.skip:focus{left:8px;top:8px}

/* spec label / dimension motif */
.speclabel{
  font-family:var(--mono);
  font-size:.7rem;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--green-d);
  display:inline-flex;
  align-items:center;
  gap:9px;
}
.speclabel::before{
  content:"";width:26px;height:1px;background:var(--green);position:relative;
}
.speclabel::after{
  content:"+";color:var(--red);font-weight:700;
}

/* ===== HEADER ===== */
header.site{
  position:sticky;top:0;z-index:100;
  background:rgba(244,243,236,.94);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.navbar{display:flex;align-items:center;justify-content:space-between;height:66px}
.brand{display:flex;align-items:center;gap:12px}
.brand svg{height:34px;width:auto}
.brand .tag{
  font-family:var(--mono);font-size:.62rem;letter-spacing:.14em;
  text-transform:uppercase;color:#5a6660;border-left:1px solid var(--line);
  padding-left:11px;line-height:1.2;
}
.brand .tag b{color:var(--ink);font-weight:600;display:block}
nav.main ul{display:flex;gap:4px;list-style:none;align-items:center}
nav.main a{
  font-family:var(--mono);font-size:.76rem;letter-spacing:.02em;
  color:var(--ink);padding:8px 11px;border-radius:3px;
  text-transform:uppercase;transition:background .15s,color .15s;
}
nav.main a:hover{background:var(--green);color:#fff}
nav.main a[aria-current="page"]{color:var(--green-d);font-weight:600}
nav.main a.cta{
  border:1px solid var(--green);color:var(--green-d);
}
nav.main a.cta:hover{background:var(--green);color:#fff}

/* dropdown for Productos */
nav.main li.has-sub{position:relative}
nav.main .sub{
  position:absolute;top:100%;left:0;min-width:248px;
  background:var(--paper);border:1px solid var(--line);border-radius:4px;
  box-shadow:0 12px 24px rgba(17,32,28,.14);
  padding:6px;display:none;flex-direction:column;gap:2px;z-index:120;
}
nav.main li.has-sub:hover .sub,
nav.main li.has-sub:focus-within .sub{display:flex}
nav.main .sub a{
  text-transform:none;letter-spacing:0;font-size:.78rem;border-radius:3px;
  white-space:nowrap;
}

.burger{display:none;background:none;border:1px solid var(--line);border-radius:4px;
  width:42px;height:38px;cursor:pointer;align-items:center;justify-content:center}
.burger span,.burger span::before,.burger span::after{
  content:"";display:block;width:20px;height:2px;background:var(--ink);position:relative;transition:.2s}
.burger span::before{position:absolute;top:-6px}
.burger span::after{position:absolute;top:6px}

/* ===== BUTTONS ===== */
.btn{
  display:inline-flex;align-items:center;gap:9px;
  font-family:var(--mono);font-size:.82rem;font-weight:600;
  letter-spacing:.04em;text-transform:uppercase;
  padding:14px 22px;border-radius:4px;cursor:pointer;border:1px solid transparent;
  transition:transform .12s, box-shadow .12s, background .15s;
}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--green);color:#fff;box-shadow:4px 4px 0 var(--ink)}
.btn-primary:hover{background:var(--green-d);box-shadow:6px 6px 0 var(--ink);color:#fff}
.btn-ghost{background:transparent;color:var(--ink);border:1px solid var(--ink)}
.btn-ghost:hover{background:var(--ink);color:var(--paper)}
.btn svg{width:15px;height:15px}

/* ===== BREADCRUMBS ===== */
.breadcrumbs{border-bottom:1px solid var(--line);background:var(--paper-2)}
.breadcrumbs ol{
  display:flex;flex-wrap:wrap;gap:8px;list-style:none;
  font-family:var(--mono);font-size:.72rem;letter-spacing:.04em;
  padding:11px 0;color:#5a6660;text-transform:uppercase;
}
.breadcrumbs li{display:flex;align-items:center;gap:8px}
.breadcrumbs li::after{content:"/";color:var(--line)}
.breadcrumbs li:last-child::after{content:""}
.breadcrumbs a{color:var(--green-d)}
.breadcrumbs li[aria-current="page"]{color:var(--ink)}

/* ===== PAGE HEADER ===== */
.page-head{padding:48px 0 40px;border-bottom:1px solid var(--line)}
.page-head h1{
  font-size:clamp(1.9rem,4.6vw,3rem);font-weight:800;color:var(--ink);
  margin:14px 0 14px;
}
.page-head h1 .accent{color:var(--green)}
.page-head .lead{font-size:clamp(1rem,2vw,1.14rem);max-width:64ch;color:#39443f}
.page-head .kvs{
  display:flex;gap:0;margin-top:26px;flex-wrap:wrap;
  border:1px solid var(--line);background:var(--paper-2);border-radius:5px;overflow:hidden;max-width:760px;
}
.page-head .kvs div{padding:12px 16px;flex:1;min-width:120px;border-right:1px dashed var(--line)}
.page-head .kvs div:last-child{border-right:none}
.page-head .kvs b{font-family:var(--mono);font-size:1.05rem;display:block;color:var(--green-d)}
.page-head .kvs span{font-size:.72rem;color:#5a6660;font-family:var(--mono);letter-spacing:.04em}

/* ===== SECTIONS ===== */
section.block{padding:60px 0}
.sec-head{margin-bottom:34px;max-width:66ch}
.sec-head h2{font-size:clamp(1.5rem,3.6vw,2.2rem);font-weight:800;margin:12px 0 10px;color:var(--ink)}
.sec-head p{color:#46514c;font-size:1.02rem}
.alt{background:var(--paper-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.dark-sec{background:var(--dark);color:#cdd6d2;border-top:1px solid #0a1218;border-bottom:1px solid #0a1218}
.dark-sec .sec-head h2{color:#fff}
.dark-sec .sec-head p{color:#9fb0ab}
.dark-sec .speclabel{color:var(--teal)}
.dark-sec .speclabel::before{background:var(--teal)}

/* ===== CATALOG LANDING CARDS ===== */
.cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.cat-card{
  background:#fbfbf6;border:1px solid var(--line);border-radius:6px;padding:24px 22px;
  position:relative;display:flex;flex-direction:column;
  transition:transform .15s,box-shadow .15s,border-color .15s;
}
.cat-card:hover{transform:translateY(-4px);box-shadow:6px 8px 0 rgba(17,32,28,.1);border-color:var(--green)}
.cat-card .idx{
  position:absolute;top:14px;right:16px;font-family:var(--mono);font-size:.7rem;
  color:var(--line);letter-spacing:.1em;
}
.cat-card .ic{
  width:54px;height:54px;border:1px solid var(--ink);border-radius:5px;
  display:flex;align-items:center;justify-content:center;margin-bottom:16px;background:var(--paper);
}
.cat-card .ic svg{width:34px;height:34px;stroke:var(--green-d);fill:none;stroke-width:1.6}
.cat-card h2,.cat-card h3{font-size:1.16rem;font-weight:700;margin-bottom:8px}
.cat-card p{font-size:.93rem;color:#46514c;flex:1}
.cat-card .series{margin-top:12px;display:flex;flex-wrap:wrap;gap:6px}
.cat-card .series span{
  font-family:var(--mono);font-size:.66rem;background:var(--paper-2);
  border:1px solid var(--line);padding:3px 8px;border-radius:3px;color:#39443f;
}
.cat-card .more{
  margin-top:16px;font-family:var(--mono);font-size:.74rem;font-weight:600;
  letter-spacing:.04em;text-transform:uppercase;color:var(--green-d);
  display:inline-flex;align-items:center;gap:7px;
}
.cat-card:hover .more{color:var(--green)}

/* ===== SERIES / PRODUCT CARDS (category pages) ===== */
.series-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.series-grid.two{grid-template-columns:repeat(2,1fr)}
.series-card{
  background:#fbfbf6;border:1px solid var(--line);border-radius:6px;padding:22px 20px;
  position:relative;transition:transform .15s,box-shadow .15s,border-color .15s;
}
.series-card:hover{transform:translateY(-3px);box-shadow:6px 8px 0 rgba(17,32,28,.1);border-color:var(--green)}
.series-card .badge{
  font-family:var(--mono);font-size:.7rem;font-weight:600;letter-spacing:.06em;
  background:var(--ink);color:var(--paper);border-radius:3px;padding:4px 9px;
  display:inline-block;margin-bottom:12px;
}
.series-card h3{font-size:1.12rem;font-weight:700;margin-bottom:8px}
.series-card>p{font-size:.92rem;color:#46514c;margin-bottom:14px}
.series-card .specs{list-style:none;border-top:1px dashed var(--line);padding-top:12px}
.series-card .specs li{
  font-size:.86rem;color:#3a463f;padding:5px 0;display:flex;gap:8px;
  border-bottom:1px dashed var(--line);
}
.series-card .specs li:last-child{border-bottom:none}
.series-card .specs li b{
  font-family:var(--mono);font-size:.68rem;letter-spacing:.04em;text-transform:uppercase;
  color:var(--green-d);min-width:118px;flex-shrink:0;
}

/* ===== SPEC TABLE ===== */
.table-frame{border:1px solid var(--ink);border-radius:6px;background:#fbfbf6;overflow:hidden}
.table-scroll{overflow-x:auto}
table.spec{width:100%;border-collapse:collapse;min-width:640px;font-size:.92rem}
table.spec caption{
  font-family:var(--mono);font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;
  text-align:left;padding:14px 18px;color:var(--green-d);border-bottom:1px solid var(--line);
  background:var(--paper-2);
}
table.spec th,table.spec td{padding:12px 18px;text-align:left;border-bottom:1px solid var(--line)}
table.spec thead th{
  font-family:var(--mono);font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;
  color:#39443f;background:var(--paper-2);border-bottom:1px solid var(--ink);
}
table.spec tbody tr:hover{background:rgba(15,122,79,.06)}
table.spec td.size{font-family:var(--mono);font-weight:600;color:var(--green-d);white-space:nowrap}
table.spec td .iadc,table.spec td.mono{font-family:var(--mono);font-size:.84rem}
.table-note{font-family:var(--mono);font-size:.72rem;color:#5a6660;padding:11px 18px;background:var(--paper-2);border-top:1px solid var(--line)}

/* ===== APPLICATION / INFO CARDS ===== */
.app-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.app-card{
  background:#fbfbf6;border:1px solid var(--line);border-radius:6px;padding:22px 20px;
}
.app-card h3{font-size:1.06rem;font-weight:700;margin-bottom:8px}
.app-card p{font-size:.93rem;color:#46514c}
.dark-sec .app-card{background:#15212b;border-color:#243441}
.dark-sec .app-card h3{color:#fff}
.dark-sec .app-card p{color:#9fb0ab}
.dark-sec .app-card .ref{font-family:var(--mono);font-size:.66rem;color:var(--gold);margin-top:10px;letter-spacing:.06em}

/* ===== PROSE / ARTICLE ===== */
.prose{max-width:74ch}
.prose p{margin-bottom:16px;color:#3a463f;font-size:1.04rem}
.prose h2{font-size:clamp(1.4rem,3.2vw,1.9rem);font-weight:800;margin:34px 0 12px;color:var(--ink)}
.prose h3{font-size:1.2rem;font-weight:700;margin:24px 0 10px;color:var(--ink)}
.prose ul,.prose ol{margin:0 0 18px 22px}
.prose li{margin-bottom:8px;color:#3a463f}
.prose strong{color:var(--ink)}
.prose a{text-decoration:underline}
.prose .lead-p{font-size:1.14rem;color:var(--ink)}
.prose figure{margin:22px 0}
.prose blockquote{
  border-left:3px solid var(--green);background:var(--paper-2);
  padding:14px 18px;margin:20px 0;font-style:italic;color:#39443f;border-radius:0 4px 4px 0;
}
.article-meta{
  font-family:var(--mono);font-size:.72rem;letter-spacing:.06em;color:#5a6660;
  text-transform:uppercase;margin-top:10px;display:flex;flex-wrap:wrap;gap:14px;
}
.article-layout{display:grid;grid-template-columns:1fr 280px;gap:42px;align-items:start}
.toc{
  position:sticky;top:84px;border:1px solid var(--line);background:#fbfbf6;border-radius:6px;
  padding:18px 18px 14px;
}
.toc h2{font-family:var(--mono);font-size:.68rem;letter-spacing:.12em;text-transform:uppercase;
  color:var(--green-d);margin-bottom:12px}
.toc ul{list-style:none}
.toc li{margin-bottom:8px}
.toc a{font-size:.86rem;color:#3a463f;display:block;padding-left:10px;border-left:2px solid var(--line)}
.toc a:hover{border-color:var(--green);color:var(--green-d)}

/* key-takeaway / callout box */
.callout{
  border:1px solid var(--ink);background:#fbfbf6;border-radius:6px;
  box-shadow:6px 6px 0 rgba(17,32,28,.08);padding:0;overflow:hidden;margin:24px 0;
}
.callout .ch{
  font-family:var(--mono);font-size:.68rem;letter-spacing:.12em;text-transform:uppercase;
  padding:11px 18px;background:var(--ink);color:var(--paper);display:flex;justify-content:space-between;
}
.callout .cb{padding:16px 18px}
.callout .cb ul{margin:0 0 0 18px}
.callout .cb li{margin-bottom:7px;color:#3a463f}

/* related links */
.related{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.related a{
  background:#fbfbf6;border:1px solid var(--line);border-radius:6px;padding:18px;
  display:block;transition:border-color .15s,transform .15s;
}
.related a:hover{border-color:var(--green);transform:translateY(-3px)}
.related .k{font-family:var(--mono);font-size:.66rem;letter-spacing:.08em;text-transform:uppercase;color:var(--green-d)}
.related .t{font-weight:700;font-size:1rem;margin-top:6px;color:var(--ink)}

/* ===== CONTACT / FORM ===== */
.contact-grid{display:grid;grid-template-columns:.95fr 1.05fr;gap:42px;align-items:start}
.contact-copy .speclabel{margin-bottom:14px}
.contact-copy h2{font-size:clamp(1.5rem,3.6vw,2.1rem);font-weight:800;margin-bottom:14px}
.contact-copy p{color:#3a463f;margin-bottom:16px;max-width:42ch}
.contact-copy .email-line{
  font-family:var(--mono);font-size:1rem;display:inline-flex;align-items:center;gap:10px;
  border:1px solid var(--ink);border-radius:5px;padding:11px 16px;background:#fbfbf6;
}
form.quote{
  background:#fbfbf6;border:1px solid var(--ink);border-radius:6px;padding:26px;
  box-shadow:8px 8px 0 rgba(17,32,28,.08);
}
.field{margin-bottom:16px}
.field.row{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:0}
.field.row .field{margin-bottom:16px}
label{display:block;font-family:var(--mono);font-size:.72rem;letter-spacing:.08em;
  text-transform:uppercase;color:#39443f;margin-bottom:6px}
label .req{color:var(--red)}
input,textarea{
  width:100%;font-family:var(--body);font-size:.98rem;color:var(--ink);
  background:var(--paper);border:1px solid var(--line);border-radius:4px;padding:11px 13px;
  transition:border-color .15s,box-shadow .15s;
}
input:focus,textarea:focus{border-color:var(--green);box-shadow:0 0 0 3px rgba(15,122,79,.15);outline:none}
textarea{resize:vertical;min-height:108px}
form.quote .btn-primary{width:100%;justify-content:center;margin-top:4px}
.form-note{font-family:var(--mono);font-size:.7rem;color:#5a6660;margin-top:12px;text-align:center}
.form-ok{display:none;font-family:var(--mono);font-size:.84rem;color:var(--green-d);
  border:1px solid var(--green);background:rgba(15,122,79,.08);border-radius:4px;
  padding:11px 14px;margin-top:14px}
.form-ok.show{display:block}

/* ===== CTA BAND ===== */
.cta-band{background:var(--green);color:#fff;border:none;text-align:center}
.cta-band h2{font-size:clamp(1.5rem,3.6vw,2.1rem);font-weight:800;margin-bottom:12px;color:#fff}
.cta-band p{max-width:54ch;margin:0 auto 22px;color:#eaf5ef}
.cta-band .btn-primary{background:var(--ink);box-shadow:4px 4px 0 rgba(0,0,0,.35)}
.cta-band .btn-primary:hover{background:#0a1218;box-shadow:6px 6px 0 rgba(0,0,0,.35)}

/* ===== FOOTER ===== */
footer.site{background:var(--dark);color:#9fb0ab;padding:46px 0 28px;border-top:3px solid var(--green)}
.foot-top{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap;
  padding-bottom:26px;border-bottom:1px solid #243441;margin-bottom:22px}
.foot-brand svg{height:30px;margin-bottom:12px}
.foot-brand p{font-size:.9rem;max-width:38ch}
.foot-brand a{color:var(--teal)}
.foot-links{display:flex;gap:46px;flex-wrap:wrap}
.foot-links h4{font-family:var(--mono);font-size:.68rem;letter-spacing:.1em;text-transform:uppercase;
  color:#fff;margin-bottom:12px}
.foot-links ul{list-style:none}
.foot-links li{margin-bottom:8px}
.foot-links a{color:#9fb0ab;font-size:.9rem}
.foot-links a:hover{color:var(--teal)}
.foot-bottom{display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-family:var(--mono);font-size:.74rem;color:#6f807a}
.foot-bottom a{color:#9fb0ab}

/* schematic frame (reused decorative drawing) */
.schematic{
  position:relative;border:1px solid var(--ink);background:#fbfbf6;border-radius:6px;
  padding:18px 16px 14px;box-shadow:8px 8px 0 rgba(17,32,28,.08);
}
.schematic .titlebar{
  display:flex;justify-content:space-between;align-items:center;
  font-family:var(--mono);font-size:.66rem;letter-spacing:.1em;text-transform:uppercase;
  color:#5a6660;border-bottom:1px solid var(--line);padding-bottom:8px;margin-bottom:6px;
}
.schematic .titlebar .rev{color:var(--red)}
.schematic figcaption{
  font-family:var(--mono);font-size:.66rem;color:#5a6660;text-align:center;
  margin-top:4px;letter-spacing:.06em;
}

/* ===== RESPONSIVE ===== */
@media(max-width:980px){
  .cat-grid,.series-grid,.series-grid.two{grid-template-columns:repeat(2,1fr)}
  .contact-grid{grid-template-columns:1fr;gap:34px}
  .article-layout{grid-template-columns:1fr;gap:24px}
  .toc{position:static;top:auto}
  .related{grid-template-columns:1fr}
}
@media(max-width:720px){
  nav.main{position:fixed;inset:66px 0 auto 0;background:var(--paper);
    border-bottom:1px solid var(--line);transform:translateY(-130%);
    transition:transform .25s;box-shadow:0 12px 24px rgba(0,0,0,.12);max-height:calc(100vh - 66px);overflow-y:auto}
  nav.main.open{transform:translateY(0)}
  nav.main ul{flex-direction:column;align-items:stretch;gap:0;padding:10px 16px}
  nav.main a{padding:14px 8px;border-bottom:1px dashed var(--line);border-radius:0}
  nav.main a.cta{margin-top:8px;border-radius:4px;text-align:center;justify-content:center}
  nav.main li.has-sub .sub{position:static;display:flex;box-shadow:none;border:none;
    padding:0 0 0 14px;min-width:0}
  nav.main li.has-sub .sub a{font-size:.72rem;color:#5a6660}
  .burger{display:flex}
  .field.row{grid-template-columns:1fr;gap:0}
}
@media(max-width:560px){
  .cat-grid,.series-grid,.series-grid.two,.app-grid{grid-template-columns:1fr}
  .page-head .kvs div{min-width:100%;border-right:none;border-bottom:1px dashed var(--line)}
  .page-head .kvs div:last-child{border-bottom:none}
}
@media(prefers-reduced-motion:reduce){
  *{scroll-behavior:auto!important;transition:none!important}
}