/* Proverb Industrial Technology Group — proverbindustrial.com
   Concepto: tablero de control nocturno. Azul marino profundo, circuitos que se encienden y los tres colores
   de los pilares (verde, azul, naranja) como señales; tipografía ancha e industrial como el wordmark. */
:root {
  --fondo: #06101f;
  --fondo-2: #0a1830;
  --panel: #0d1d38;
  --linea: #1c2f52;
  --texto: #e8eef8;
  --suave: #9aabc4;
  --metal: #c9d4e3;
  --verde: #2fb84f;
  --azul: #2f7dff;
  --naranja: #ff8a1f;
  --acento: var(--azul);
  --display: "Saira", "Bahnschrift", "Arial Narrow", sans-serif;
  --cuerpo: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
  --radio: 10px;
  --ancho: 1180px;
  --lado: max(20px, env(safe-area-inset-left, 0px));
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  margin: 0;
  background: var(--fondo);
  color: var(--texto);
  font: 400 17px/1.65 var(--cuerpo);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
h1, h2, h3 { font-family: var(--display); font-stretch: 112%; line-height: 1.1; text-wrap: balance; margin: 0; }
h2 { font-size: clamp(28px, 4vw, 42px); font-weight: 700; letter-spacing: .01em; margin-bottom: 28px; }
h2::after {
  content: ""; display: block; width: 56px; height: 3px; margin-top: 14px; border-radius: 2px;
  background: linear-gradient(90deg, var(--verde), var(--azul), var(--naranja));
}
:focus-visible { outline: 2px solid var(--azul); outline-offset: 3px; border-radius: 4px; }

.saltar { position: absolute; left: -999px; top: 8px; background: var(--azul); color: #fff; padding: 8px 14px; z-index: 50; }
.saltar:focus { left: 12px; }

/* ---------- Barra superior ---------- */
.barra {
  position: fixed; inset: 0 0 auto; z-index: 20;
  padding-top: env(safe-area-inset-top, 0px);
  background: rgba(6, 16, 31, .72);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(28, 47, 82, .7);
}
.barra__interior {
  max-width: var(--ancho); margin: 0 auto; height: 64px;
  padding-inline: var(--lado);
  display: flex; align-items: center; gap: 24px;
}
.marca { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.marca__texto { font: 700 20px/1 var(--display); font-stretch: 112%; letter-spacing: .08em; color: var(--metal); }
.menu { display: flex; gap: 26px; margin-left: auto; }
.menu a { text-decoration: none; color: var(--suave); font-size: 15px; font-weight: 500; transition: color .2s; }
.menu a:hover { color: var(--texto); }
.idioma {
  font: 600 13px/1 var(--cuerpo); letter-spacing: .06em; text-transform: uppercase;
  color: var(--texto); background: transparent; border: 1px solid var(--linea); border-radius: 999px;
  padding: 9px 14px; cursor: pointer; transition: border-color .2s, background .2s;
}
.idioma:hover { border-color: var(--azul); background: rgba(47, 125, 255, .1); }

/* ---------- Portada ---------- */
.portada {
  position: relative; overflow: hidden; min-height: 100svh;
  display: flex; align-items: center;
  /* Casi negro, como el fondo sobre el que se diseñó el logo oficial: así se lee su texto azul marino.
     El brillo azul va arriba a la izquierda, detrás del título, y no detrás del logo. */
  background: radial-gradient(ellipse at 18% 12%, rgba(30, 72, 140, .45) 0%, transparent 55%),
              linear-gradient(180deg, #050b17 0%, #03070f 100%);
  padding: calc(96px + env(safe-area-inset-top, 0px)) 0 64px;
}
.circuitos { position: absolute; inset: 0; width: 100%; height: 100%; }
.portada__interior {
  position: relative; max-width: var(--ancho); margin: 0 auto; padding-inline: var(--lado);
  display: grid; grid-template-columns: 1.3fr 1fr; gap: 48px; align-items: center; width: 100%;
}
.portada h1 { font-size: clamp(30px, 3.2vw, 46px); font-weight: 700; }
.portada__logo { position: relative; }
.portada__sub { color: var(--suave); font-size: clamp(17px, 1.6vw, 20px); max-width: 34em; margin: 22px 0 34px; }
.portada__botones { display: flex; flex-wrap: wrap; gap: 14px; }

.boton {
  display: inline-flex; align-items: center; justify-content: center; min-height: 48px;
  padding: 12px 24px; border-radius: 999px; text-decoration: none; cursor: pointer;
  font: 600 16px/1.2 var(--cuerpo); border: 1px solid transparent;
  transition: transform .2s, background .2s, border-color .2s, box-shadow .2s;
}
.boton--principal {
  color: #fff; background: linear-gradient(135deg, #3a87ff, #1f5fd6);
  animation: pulso 2.8s ease-out infinite;
}
.boton--principal:hover { transform: translateY(-2px); background: linear-gradient(135deg, #5a9bff, #2f6fe6); }
.boton--secundario { color: var(--texto); border-color: var(--linea); background: rgba(13, 29, 56, .6); }
.boton--secundario:hover { border-color: var(--metal); transform: translateY(-2px); }
@keyframes pulso {
  0% { box-shadow: 0 0 0 0 rgba(47, 125, 255, .55); }
  70% { box-shadow: 0 0 0 16px rgba(47, 125, 255, 0); }
  100% { box-shadow: 0 0 0 0 rgba(47, 125, 255, 0); }
}

/* Logo oficial con un brillo metálico que lo recorre (la máscara usa la forma del propio logo) */
.logo-metal { position: relative; filter: drop-shadow(0 0 28px rgba(47, 125, 255, .28)); }
.logo-metal__brillo {
  position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(105deg, transparent 38%, rgba(255, 255, 255, .55) 50%, transparent 62%);
  background-size: 300% 100%; background-repeat: no-repeat;
  -webkit-mask: url("../img/grupo.webp") center / contain no-repeat;
          mask: url("../img/grupo.webp") center / contain no-repeat;
  mix-blend-mode: screen;
  animation: brillo 6.5s ease-in-out infinite;
}
@keyframes brillo {
  0%, 55% { background-position: 130% 0; }
  85%, 100% { background-position: -30% 0; }
}

/* ---------- Cifras ---------- */
.cifras { background: var(--fondo-2); border-block: 1px solid var(--linea); }
.cifras__interior {
  max-width: var(--ancho); margin: 0 auto; padding: 36px var(--lado);
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.cifra { display: flex; flex-direction: column; gap: 4px; }
.cifra__numero {
  font: 700 clamp(40px, 5vw, 56px)/1 var(--display); font-stretch: 112%;
  background: linear-gradient(180deg, #ffffff, var(--metal) 60%, #7f90a8);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  font-variant-numeric: tabular-nums;
}
.cifra__etiqueta { color: var(--suave); font-size: 15px; }

/* ---------- Secciones ---------- */
.seccion { padding: 96px 0; }
.seccion__interior { max-width: var(--ancho); margin: 0 auto; padding-inline: var(--lado); }
.seccion__interior--estrecho { max-width: 860px; }
.nosotros__texto { font-size: clamp(18px, 1.8vw, 21px); color: #d6e0ee; margin: 0; }
.seccion--pilares { background: linear-gradient(180deg, var(--fondo) 0%, var(--fondo-2) 100%); }

/* Pilares: se elevan y se iluminan en su color */
.pilares { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.pilar {
  --color: var(--azul);
  position: relative; background: var(--panel); border: 1px solid var(--linea); border-radius: var(--radio);
  padding: 28px 26px 30px; display: flex; flex-direction: column; gap: 18px;
  transition: translate .35s cubic-bezier(.2, .8, .2, 1), border-color .35s, box-shadow .35s;
}
.pilar[data-pilar="engineering"] { --color: var(--verde); }
.pilar[data-pilar="training"] { --color: var(--naranja); }
.pilar::before {
  content: ""; position: absolute; inset: 0 0 auto; height: 3px; border-radius: var(--radio) var(--radio) 0 0;
  background: var(--color); opacity: .75;
}
.pilar:hover, .pilar:focus-within {
  translate: 0 -10px;
  border-color: color-mix(in srgb, var(--color) 70%, transparent);
  box-shadow: 0 18px 50px -12px color-mix(in srgb, var(--color) 55%, transparent),
              0 0 0 1px color-mix(in srgb, var(--color) 35%, transparent);
}
/* Placa casi negra, como el fondo del logo oficial: así se lee su texto azul marino */
.pilar__placa {
  background: radial-gradient(ellipse at 50% 40%, #0a1424 0%, #02050b 75%);
  border-radius: 8px; padding: 18px 14px; margin: -6px -8px 0;
}
.pilar img { width: 100%; max-width: 300px; margin: 0 auto; transition: filter .35s; }
.pilar:hover img { filter: drop-shadow(0 0 18px color-mix(in srgb, var(--color) 60%, transparent)); }
.pilar h3 { font-size: 13px; font-family: var(--cuerpo); font-weight: 600; letter-spacing: .14em; text-transform: uppercase; color: var(--suave); }
.pilar ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 10px; }
.pilar li { position: relative; padding-left: 18px; color: #d6e0ee; font-size: 16px; line-height: 1.5; }
.pilar li::before { content: ""; position: absolute; left: 0; top: .62em; width: 7px; height: 7px; border-radius: 50%; background: var(--color); }

/* Sectores: foto real de fondo, degradado azul marino, ícono metálico animado */
.sectores { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.sector {
  --acento: var(--azul);
  position: relative; isolation: isolate; overflow: hidden; min-height: 460px;
  background: var(--fondo-2); border: 1px solid var(--linea); border-radius: var(--radio);
  padding: 30px 28px; display: grid; gap: 12px; align-content: end;
  transition: translate .45s cubic-bezier(.2, .8, .2, 1), border-color .45s, box-shadow .45s;
}
.sector[data-sector="petrolero"] { --acento: var(--naranja); }
.sector[data-sector="industrial"] { --acento: var(--verde); }
.sector__foto { position: absolute; inset: 0; z-index: -3; }
.sector__foto img {
  width: 100%; height: 100%; max-width: none; object-fit: cover; transform: scale(1.03);
  transition: transform 7s cubic-bezier(.15, .6, .2, 1), filter .6s;
  filter: saturate(.85) brightness(.9);
}
/* Degradado azul marino: la foto se ve arriba y el texto se lee abajo */
.sector::before {
  content: ""; position: absolute; inset: 0; z-index: -2;
  background:
    linear-gradient(180deg, rgba(5, 13, 28, .30) 0%, rgba(5, 13, 28, .55) 34%, rgba(5, 13, 28, .90) 62%, #040b18 86%),
    linear-gradient(90deg, rgba(4, 11, 24, .35), transparent 60%);
}
/* Resplandor del color de acento, visible al pasar el cursor */
.sector::after {
  content: ""; position: absolute; inset: 0; z-index: -1; opacity: 0; transition: opacity .6s;
  background: radial-gradient(120% 70% at 50% 108%, color-mix(in srgb, var(--acento) 45%, transparent) 0%, transparent 62%);
}
.sector:hover, .sector:focus-within, .sector.resaltada {
  translate: 0 -8px;
  border-color: color-mix(in srgb, var(--acento) 70%, transparent);
  box-shadow: 0 22px 60px -18px color-mix(in srgb, var(--acento) 60%, transparent),
              0 0 0 1px color-mix(in srgb, var(--acento) 35%, transparent);
}
.sector:hover::after, .sector.resaltada::after { opacity: 1; }
.sector:hover .sector__foto img, .sector.resaltada .sector__foto img { transform: scale(1.14); filter: saturate(1) brightness(1); }
.sector__icono {
  width: 104px; height: 104px; display: grid; place-items: center; margin-bottom: 6px;
  border-radius: 50%; background: radial-gradient(circle at 35% 30%, rgba(30, 52, 92, .85), rgba(4, 10, 22, .92) 70%);
  border: 1px solid color-mix(in srgb, var(--acento) 45%, transparent);
  box-shadow: 0 0 24px -6px color-mix(in srgb, var(--acento) 70%, transparent), inset 0 1px 0 rgba(255, 255, 255, .12);
}
.sector svg { width: 80px; height: 80px; overflow: visible; filter: drop-shadow(0 2px 3px rgba(0, 0, 0, .6)); }
.sector h3 { font-size: 26px; font-weight: 700; text-shadow: 0 2px 12px rgba(0, 0, 0, .6); }
.sector h3::after { content: ""; display: block; width: 36px; height: 3px; margin-top: 10px; border-radius: 2px; background: var(--acento); }
.sector p { margin: 0; color: #cfd9e8; max-width: 34ch; }
.icono-metal { fill: none; stroke-width: 2.6; stroke-linecap: round; stroke-linejoin: round; }
.icono-metal--grueso { stroke-width: 4.2; }
.icono-relleno { stroke: none; }
.icono-cable { fill: none; stroke: #8796ab; stroke-width: 1.4; stroke-linecap: round; }
.icono-aislador { fill: none; stroke: var(--acento); stroke-width: 3; stroke-linecap: round; }
.icono-acento { fill: var(--acento); }
.icono-luz { fill: none; stroke: var(--acento); stroke-width: 2.4; stroke-linecap: round; stroke-dasharray: 6 10; animation: flujo 1.6s linear infinite; }
@keyframes flujo { to { stroke-dashoffset: -32; } }
@keyframes titila { 0%, 100% { opacity: .25; } 50% { opacity: 1; } }
@keyframes girar { to { transform: rotate(360deg); } }
/* Chispas en los aisladores de la línea */
.chispa { fill: #fff6cf; stroke: var(--acento); stroke-width: .8; transform-box: fill-box; transform-origin: center;
  opacity: 0; animation: chispazo 2.6s ease-out infinite; }
@keyframes chispazo {
  0%, 70% { opacity: 0; transform: scale(.3) rotate(0deg); }
  76% { opacity: 1; transform: scale(1.25) rotate(20deg); }
  82% { opacity: .2; transform: scale(.7) rotate(35deg); }
  86% { opacity: .9; transform: scale(1) rotate(45deg); }
  100% { opacity: 0; transform: scale(.4) rotate(60deg); }
}
/* Balancín: viga, vástago y manivela con el mismo ciclo */
.balancin { transform-origin: 51px 44px; animation: cabeceo 2.8s ease-in-out infinite; }
@keyframes cabeceo { 0%, 100% { transform: rotate(-8deg); } 50% { transform: rotate(8deg); } }
.vastago { animation: vaiven 2.8s ease-in-out infinite; }
@keyframes vaiven { 0%, 100% { transform: translateY(4.3px); } 50% { transform: translateY(-4.3px); } }
.manivela { transform-origin: 74px 72px; animation: girar 2.8s linear infinite; }
/* Humo leve de la chimenea */
.humo { fill: #e4eaf2; transform-box: fill-box; transform-origin: center; opacity: 0; animation: humo 4.2s ease-out infinite; }
@keyframes humo {
  0% { opacity: 0; transform: translate(0, 4px) scale(.5); }
  20% { opacity: .8; }
  100% { opacity: 0; transform: translate(-7px, -16px) scale(2.1); }
}
.ventana { fill: var(--acento); animation: titila 3.2s ease-in-out infinite; }

/* ---------- Contacto ---------- */
.seccion--contacto { background: var(--fondo-2); border-top: 1px solid var(--linea); }
.contacto { display: grid; grid-template-columns: .8fr 1.2fr; gap: 56px; align-items: start; }
.contacto__info p { color: var(--suave); margin: 0 0 18px; }
.contacto__correo a { color: var(--texto); font-weight: 600; word-break: break-all; }
.contacto__aviso { border-left: 3px solid var(--naranja); padding: 10px 14px; background: rgba(255, 138, 31, .08); border-radius: 0 6px 6px 0; color: #f3d7bd !important; }
.formulario { display: grid; grid-template-columns: 1fr 1fr; gap: 18px 20px; }
.campo { display: grid; gap: 6px; }
.campo--ancho { grid-column: 1 / -1; }
label { font-size: 14px; font-weight: 600; color: #cdd8e8; }
input, select, textarea {
  width: 100%; font: 400 16px/1.4 var(--cuerpo); color: var(--texto);
  background: var(--fondo); border: 1px solid var(--linea); border-radius: 8px; padding: 12px 14px;
  transition: border-color .2s, box-shadow .2s;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--azul); box-shadow: 0 0 0 3px rgba(47, 125, 255, .2); }
textarea { resize: vertical; }
.casilla { grid-template-columns: auto 1fr; align-items: start; gap: 10px; }
.casilla input { width: 20px; height: 20px; margin-top: 3px; accent-color: var(--azul); }
.casilla label { font-weight: 400; }
.trampa { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }
.formulario__pie { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; }
.formulario__estado { margin: 0; color: var(--suave); font-size: 15px; }
.formulario__estado.ok { color: #7fe0a0; }
.formulario__estado.error { color: #ffb37a; }

/* ---------- Pie ---------- */
.pie { border-top: 1px solid var(--linea); padding: 40px 0 calc(40px + env(safe-area-inset-bottom, 0px)); }
.pie__interior { max-width: var(--ancho); margin: 0 auto; padding-inline: var(--lado); display: grid; gap: 22px; }
.pie__eslogan img { width: 100%; max-width: 900px; margin: 0 auto; opacity: .85; }
.pie__datos { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px 26px; color: var(--suave); font-size: 14px; }
.pie__datos a { color: var(--suave); }

/* ---------- Aviso de privacidad ---------- */
.privacidad {
  max-width: 620px; width: calc(100% - 32px); border: 1px solid var(--linea); border-radius: var(--radio);
  background: var(--panel); color: var(--texto); padding: 28px;
}
.privacidad::backdrop { background: rgba(3, 8, 18, .7); }
.privacidad h2 { font-size: 26px; margin-bottom: 18px; }
.privacidad p { color: #d6e0ee; }

/* ---------- Aparición al desplazarse (solo si hay JavaScript) ---------- */
.js .aparecer { opacity: 0; transform: translateY(26px); transition: opacity .8s ease, transform .8s cubic-bezier(.2, .8, .2, 1); }
.js .aparecer.visible { opacity: 1; transform: none; }
.captura .aparecer, .captura .sector, .captura .sector *, .captura .sector::after { transition: none !important; }
@media (min-width: 901px) { .captura .portada { min-height: 0; height: 900px; } }

/* ---------- Celular ---------- */
@media (max-width: 900px) {
  .menu { display: none; }
  .idioma { margin-left: auto; }
  .portada { min-height: auto; padding-top: calc(92px + env(safe-area-inset-top, 0px)); }
  .portada__interior { grid-template-columns: 1fr; gap: 28px; }
  .portada__logo { order: -1; max-width: 420px; margin: 0 auto; width: 100%; }
  .cifras__interior { grid-template-columns: 1fr; gap: 18px; text-align: left; }
  .cifra { flex-direction: row; align-items: baseline; gap: 12px; }
  .pilares, .sectores { grid-template-columns: 1fr; }
  .sector { min-height: 400px; }
  .contacto { grid-template-columns: 1fr; gap: 28px; }
  .formulario { grid-template-columns: 1fr; }
  .seccion { padding: 72px 0; }
  .boton { width: 100%; }
}

/* ---------- Movimiento reducido ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .js .aparecer { opacity: 1; transform: none; }
}