/* ============================================================
   sensordecorriente.com.ar — sistema de diseño
   Distinto de eltoroide.com.ar (Poppins / negro-rojo-blanco):
   acá usamos Space Grotesk + Inter + IBM Plex Mono, sobre un
   fondo grafito/acero con rojo señal como acento de marca y
   una onda senoidal como elemento de firma (corriente alterna).
   ============================================================ */

:root{
  /* color */
  --grafito:      #10151b;   /* fondo principal oscuro */
  --acero:        #1c2732;   /* paneles / secciones sobre grafito */
  --acero-borde:  #2c3a48;   /* bordes sutiles sobre acero */
  --blanco:       #f7f8f9;   /* texto sobre oscuro / fondo claro */
  --gris-panel:   #eef1f3;   /* fondo claro alterno */
  --texto:        #161a1d;   /* texto principal sobre claro */
  --texto-mute:   #5b6672;   /* texto secundario */
  --rojo-senal:   #e11d2e;   /* acento de marca — pedido por Pablo */
  --rojo-senal-dark: #b5121f;
  --ambar:        #f2a413;   /* acento secundario — "corriente" */
  --verde-wsp:      #25d366;   /* botones de contacto por WhatsApp */
  --verde-wsp-dark: #1ea952;

  /* tipografia */
  --f-display: "Space Grotesk", "Arial Narrow", sans-serif;
  --f-body:    "Inter", -apple-system, "Segoe UI", sans-serif;
  --f-mono:    "IBM Plex Mono", "Courier New", monospace;

  --radius: 4px;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  font-family: var(--f-body);
  color: var(--texto);
  background: var(--blanco);
  line-height:1.55;
}
img{ max-width:100%; height:auto; display:block; }
a{ color:inherit; text-decoration:none; }
h1,h2,h3,h4{
  font-family: var(--f-display);
  letter-spacing: -0.01em;
  margin: 0 0 .5em 0;
  line-height:1.1;
}
.mono{ font-family: var(--f-mono); }

.container{
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- encabezado (compartido en todas las paginas) ---------- */
header.site-header{
  position: sticky;
  top:0;
  z-index: 50;
  background: var(--grafito);
  border-bottom: 1px solid var(--acero-borde);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:18px;
  padding: 12px 24px;
  max-width: 1180px;
  margin: 0 auto;
}
.brand{
  display:flex;
  align-items:center;
  gap:14px;
  margin-right: auto;
}
.brand-toroide-logo{
  height: 34px;
  width:auto;
  opacity:.92;
  border-radius: 3px;
  flex-shrink:0;
}
.brand-divider{
  width:1px;
  height:26px;
  background: var(--acero-borde);
}
.brand-wordmark{
  font-family: var(--f-display);
  font-weight: 700;
  font-size: clamp(1.15rem, 2vw, 1.55rem);
  color: var(--rojo-senal);
  white-space: nowrap;
  letter-spacing: -0.02em;
}
.brand-wordmark span{
  color: var(--blanco);
  font-weight: 500;
  opacity:.55;
  font-size: .58em;
  display:block;
  letter-spacing: .12em;
  text-transform: uppercase;
  margin-top: 2px;
}
nav.main-nav{
  display:flex;
  gap: 6px;
  align-items:center;
}
nav.main-nav a{
  color: var(--blanco);
  opacity:.8;
  font-size: .92rem;
  padding: 8px 12px;
  border-radius: var(--radius);
  transition: opacity .15s, background .15s;
}
nav.main-nav a:hover{ opacity:1; background: rgba(255,255,255,.06); }
nav.main-nav a.active{ opacity:1; color: var(--rojo-senal); }

.header-contact{
  display:flex;
  align-items:center;
  gap:14px;
}
.header-phone{
  font-family: var(--f-mono);
  font-size: .8rem;
  color: rgba(247,248,249,.65);
  white-space: nowrap;
}
.header-phone strong{ color: var(--blanco); font-weight:500; }
.btn-whatsapp{
  background: var(--verde-wsp);
  color: var(--grafito);
  padding: 9px 16px;
  border-radius: var(--radius);
  font-size:.88rem;
  font-weight:700;
  white-space:nowrap;
  transition: background .15s;
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.btn-whatsapp:hover{ background: var(--verde-wsp-dark); color: var(--blanco); }
.btn-whatsapp-lg{ padding: 13px 22px; font-size:.95rem; }

@media (max-width: 860px){
  .header-inner{ flex-wrap: wrap; }
  nav.main-nav{ order:3; width:100%; justify-content:flex-start; overflow-x:auto; }
  .header-contact .btn-whatsapp{ display:none; }
  .header-contact .header-phone{ display:none; }
}

/* ---------- onda senoidal — elemento de firma ---------- */
.sine-divider{
  width:100%;
  height: 40px;
  display:block;
  color: var(--rojo-senal);
}
.sine-divider path{
  fill:none;
  stroke: currentColor;
  stroke-width: 2;
  opacity:.55;
}

/* ---------- hero ---------- */
.hero{
  background: var(--grafito);
  color: var(--blanco);
  padding: 64px 0 0 0;
  position:relative;
  overflow:hidden;
}
.hero-inner{
  display:grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 40px;
  align-items:center;
  padding-bottom: 48px;
}
.eyebrow{
  font-family: var(--f-mono);
  color: var(--ambar);
  font-size: .82rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  margin-bottom: 14px;
}
.hero h1{
  font-size: clamp(2rem, 4vw, 3.1rem);
  font-weight: 700;
}
.hero h1 em{
  font-style: normal;
  color: var(--rojo-senal);
}
.hero p.lead{
  color: rgba(247,248,249,.72);
  font-size: 1.08rem;
  max-width: 46ch;
  margin: 18px 0 28px 0;
}
.hero-actions{ display:flex; gap:14px; flex-wrap:wrap; }
.btn-primary{
  background: var(--rojo-senal);
  color: var(--blanco);
  padding: 13px 22px;
  border-radius: var(--radius);
  font-weight:600;
  font-size:.95rem;
}
.btn-primary:hover{ background: var(--rojo-senal-dark); }
.btn-ghost{
  border: 1px solid var(--acero-borde);
  color: var(--blanco);
  padding: 13px 22px;
  border-radius: var(--radius);
  font-weight:600;
  font-size:.95rem;
}
.btn-ghost:hover{ border-color: rgba(255,255,255,.4); }
.btn-ghost-wsp{ border-color: var(--verde-wsp); color: var(--verde-wsp); }
.btn-ghost-wsp:hover{ background: var(--verde-wsp); color: var(--grafito); }

.hero-figure{
  background: var(--acero);
  border: 1px solid var(--acero-borde);
  border-radius: 8px;
  padding: 28px;
  position:relative;
}
.hero-figure img{ border-radius: 4px; }
.hero-spec{
  display:flex;
  justify-content:space-between;
  margin-top:16px;
  font-family: var(--f-mono);
  font-size:.8rem;
  color: rgba(247,248,249,.6);
  border-top: 1px solid var(--acero-borde);
  padding-top: 12px;
}

/* ---------- secciones ---------- */
section{ padding: 56px 0; }
section.alt{ background: var(--gris-panel); }
.section-head{
  display:flex;
  justify-content:space-between;
  align-items:flex-end;
  gap: 24px;
  margin-bottom: 32px;
  flex-wrap:wrap;
}
.section-head h2{ font-size: clamp(1.4rem, 2.4vw, 1.9rem); }
.section-head p{ color: var(--texto-mute); max-width: 52ch; margin:0; }

/* ---------- grilla de productos ---------- */
.product-grid{
  display:grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 22px;
}
.product-card{
  background: var(--blanco);
  border: 1px solid #e2e6ea;
  border-radius: 8px;
  overflow:hidden;
  display:flex;
  flex-direction:column;
  transition: border-color .15s, transform .15s;
}
.product-card:hover{ border-color: var(--rojo-senal); transform: translateY(-2px); }
.product-card .thumb{
  aspect-ratio: 4/3;
  background: var(--gris-panel);
  display:flex;
  align-items:center;
  justify-content:center;
  overflow:hidden;
}
.product-card .thumb img{ width:100%; height:100%; object-fit: contain; padding: 14px; }
.product-card .body{ padding: 16px 18px 18px; display:flex; flex-direction:column; gap:8px; flex:1; }
.tag{
  align-self:flex-start;
  font-family: var(--f-mono);
  font-size:.68rem;
  letter-spacing:.06em;
  text-transform:uppercase;
  color: var(--rojo-senal);
  background: rgba(225,29,46,.08);
  padding: 3px 8px;
  border-radius: 3px;
}
.product-card h3{ font-size: 1rem; margin:0; }
.product-card .model{
  font-family: var(--f-mono);
  font-size:.78rem;
  color: var(--texto-mute);
}
.product-card .specs{
  font-size:.85rem;
  color: var(--texto-mute);
  margin: 0;
  padding: 0;
  list-style:none;
  display:flex;
  flex-direction:column;
  gap:2px;
}
.product-card .specs li:before{ content: "· "; color: var(--rojo-senal); }
.product-card .more{
  margin-top:auto;
  padding-top:10px;
  font-size:.85rem;
  font-weight:600;
  color: var(--grafito);
  display:flex;
  align-items:center;
  gap:6px;
}
.product-card:hover .more{ color: var(--rojo-senal); }

/* ---------- pie de pagina (compartido en todas las paginas) ---------- */
footer.site-footer{
  background: var(--grafito);
  color: rgba(247,248,249,.75);
  padding: 48px 0 24px;
  margin-top: 40px;
}
.footer-grid{
  display:grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  gap: 32px;
}
.footer-brand .brand-wordmark{ font-size: 1.2rem; }
.footer-brand p{ font-size:.9rem; color: rgba(247,248,249,.55); max-width: 40ch; margin-top:12px; }
footer h4{
  font-family: var(--f-mono);
  font-size:.78rem;
  letter-spacing:.1em;
  text-transform: uppercase;
  color: var(--ambar);
  margin-bottom: 14px;
}
footer ul{ list-style:none; padding:0; margin:0; display:flex; flex-direction:column; gap:9px; }
footer a{ color: rgba(247,248,249,.75); font-size:.9rem; }
footer a:hover{ color: var(--blanco); }
.footer-bottom{
  border-top: 1px solid var(--acero-borde);
  margin-top: 36px;
  padding-top: 20px;
  font-size:.8rem;
  color: rgba(247,248,249,.4);
  display:flex;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:10px;
}
@media (max-width: 760px){
  .footer-grid{ grid-template-columns: 1fr; }
  .hero-inner{ grid-template-columns: 1fr; }
}

/* ---------- ficha de producto ---------- */
.product-hero{ padding: 8px 0 8px; }
.product-hero-grid{
  display:grid;
  grid-template-columns: 1fr 1.05fr;
  gap: 44px;
  align-items:start;
}
.product-gallery-main{
  aspect-ratio: 1/1;
  background: var(--gris-panel);
  border: 1px solid #e2e6ea;
  border-radius: 8px;
  overflow:hidden;
  display:flex;
  align-items:center;
  justify-content:center;
}
.product-gallery-main img{ width:100%; height:100%; object-fit:contain; padding: 18px; }

.product-info .eyebrow{ margin-bottom: 8px; }
.product-info h1{ font-size: clamp(1.6rem, 3vw, 2.3rem); margin-bottom: 18px; }

dl.spec-list{ border-top: 1px solid #e2e6ea; margin-bottom: 22px; }
dl.spec-list div, .spec-block div{
  display:flex;
  justify-content:space-between;
  gap:16px;
  padding: 11px 0;
  border-bottom: 1px solid #e2e6ea;
  font-size:.95rem;
}
dl.spec-list dt, .spec-block dt{ color: var(--texto-mute); }
dl.spec-list dd, .spec-block dd{ font-weight:600; text-align:right; font-family: var(--f-mono); font-size:.88rem; }

.btn-outline{
  display:inline-flex;
  align-items:center;
  gap:8px;
  border: 1px solid var(--acero-borde);
  color: var(--texto);
  padding: 11px 20px;
  border-radius: var(--radius);
  font-size:.9rem;
  font-weight:600;
}
.btn-outline:hover{ border-color: var(--rojo-senal); color: var(--rojo-senal); }

.tech-section h2{ font-size: clamp(1.25rem, 2.2vw, 1.7rem); margin-bottom: 16px; }
.tech-section p{ color: var(--texto-mute); font-size: 1rem; line-height:1.7; max-width: 780px; margin-bottom: 12px; }
.tech-section p strong{ color: var(--texto); }

.spec-block{
  background:#fff;
  border: 1px solid #e2e6ea;
  border-left: 3px solid var(--rojo-senal);
  border-radius: 6px;
  padding: 8px 22px;
  max-width: 560px;
  margin: 10px 0;
}
.spec-block div:last-child{ border-bottom:none; }

.data-table{
  width:100%;
  max-width: 560px;
  border-collapse: collapse;
  margin: 10px 0 22px;
  font-size:.9rem;
  border-radius: 6px;
  overflow:hidden;
  border: 1px solid #e2e6ea;
}
.data-table caption{ text-align:left; font-weight:600; padding-bottom:8px; }
.data-table th{
  background: var(--grafito);
  color: var(--blanco);
  text-align:left;
  padding: 10px 14px;
  font-family: var(--f-mono);
  font-weight:500;
  font-size:.8rem;
}
.data-table td{ padding: 9px 14px; border-bottom:1px solid #e2e6ea; color: var(--texto-mute); font-family: var(--f-mono); }
.data-table tr:last-child td{ border-bottom:none; }
.data-table tr:nth-child(even) td{ background: var(--gris-panel); }

.din-grid{ display:grid; grid-template-columns: repeat(2,1fr); gap: 18px; margin-top: 8px; max-width: 560px; }
.din-card{ border: 1px solid #e2e6ea; border-radius: 6px; overflow:hidden; }
.din-card img{ width:100%; display:block; }

.measure-flex{ display:grid; grid-template-columns: 1fr 1fr; gap: 36px; align-items:center; }
.measure-flex img{ width:100%; border-radius:6px; border:1px solid #e2e6ea; }

.dims-flex{ display:flex; justify-content:center; }
.dims-flex img{ max-width: 560px; width:100%; border-radius:6px; border:1px solid #e2e6ea; background:#fff; padding:12px; }

.diagram-single img{
  max-width: 640px; width:100%;
  border-radius:6px; border:1px solid #e2e6ea; background:#fff;
  display:block; margin: 8px 0; padding: 12px;
}

.help-card{
  max-width: 560px;
  margin: 0 auto;
  border-radius: 8px;
  overflow:hidden;
  border: 1px solid var(--acero-borde);
}
.help-card-head{ background: var(--grafito); padding: 20px 24px; text-align:center; }
.help-card-head h2{ color: var(--blanco); font-size: 1.4rem; }
.help-card-body{ background:#fff; padding: 30px 26px; text-align:center; }
.help-card-body .help-lead{ color: var(--texto-mute); margin-bottom: 16px; }
.help-card-body .help-line{ font-size:.95rem; margin-bottom:6px; }
.help-card-body .help-hours{ color: var(--texto-mute); font-size:.85rem; margin-top: 16px; }

@media (max-width: 860px){
  .product-hero-grid{ grid-template-columns: 1fr; gap: 28px; }
  .din-grid{ grid-template-columns: 1fr; }
  .measure-flex{ grid-template-columns: 1fr; }
}

.breadcrumb{
  font-size:.82rem;
  color: var(--texto-mute);
  padding: 16px 0 0;
}
.breadcrumb a:hover{ color: var(--rojo-senal); }