/* Minerva Industrial - estilos. Mobile first. Sin bordes redondeados. */
:root {
  --petroleo: #0F1A20;
  --primario: #006879;
  --primario-claro: #04adc9;
  --fondo: #f9f9ff;
  --superficie: #eaedfa;
  --texto: #171c24;
  --texto-2: #3d494c;
  --borde: #bcc9cd;
  --error: #ba1a1a;

  --f-sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --f-serif: "IBM Plex Serif", Georgia, serif;
  --nav-h: 64px;
  --gutter: clamp(1rem, 4vw, 2rem);
  --espacio: clamp(4rem, 9vw, 8rem);
}

*, *::before, *::after { box-sizing: border-box; border-radius: 0; }
* { border-radius: 0; }

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 1rem); -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--f-sans);
  font-size: clamp(1rem, 0.96rem + 0.2vw, 1.125rem);
  line-height: 1.6;
  color: var(--texto);
  background: var(--fondo);
}
img, canvas { display: block; max-width: 100%; }
h1, h2, h3, p, ul, ol, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: var(--primario); }

:focus-visible { outline: 3px solid var(--primario); outline-offset: 3px; }
.oscuro :focus-visible { outline-color: var(--primario-claro); }

.skip {
  position: fixed; left: 1rem; top: 0; z-index: 200;
  padding: .75rem 1rem; background: var(--fondo); color: var(--texto);
  transform: translateY(-120%);
}
.skip:focus { transform: translateY(1rem); }

.contenedor { width: 100%; max-width: 1200px; margin-inline: auto; padding-inline: var(--gutter); }

.oscuro { background: var(--petroleo); color: var(--fondo); }
.oscuro a { color: var(--primario-claro); }

.label {
  font-family: var(--f-serif); font-weight: 500;
  font-size: clamp(.75rem, .72rem + .15vw, .875rem);
  letter-spacing: .14em; text-transform: uppercase;
  color: var(--primario);
}
.oscuro .label { color: var(--primario-claro); }

h1 { font-weight: 600; line-height: 1.1; letter-spacing: -.01em; font-size: clamp(2rem, 1.2rem + 3.6vw, 4.25rem); }
h2 { font-weight: 600; line-height: 1.2; letter-spacing: -.005em; font-size: clamp(1.5rem, 1.1rem + 1.8vw, 2.5rem); }
h3 { font-weight: 600; line-height: 1.3; font-size: clamp(1.2rem, 1.1rem + .5vw, 1.5rem); }
.lead { font-size: clamp(1.1rem, 1rem + .5vw, 1.35rem); color: var(--texto-2); max-width: 46ch; }
.oscuro .lead { color: var(--fondo); }

/* Logo tipográfico */
.logo {
  display: inline-block; font-family: var(--f-sans); font-weight: 600;
  font-size: clamp(.9rem, .8rem + .4vw, 1.1rem); letter-spacing: .16em;
  color: var(--fondo); text-decoration: none; white-space: nowrap;
}
.oscuro a.logo { color: var(--fondo); }

/* Botones */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 48px; padding: .7rem 1.5rem; border: 2px solid transparent;
  font: 500 1rem/1.2 var(--f-sans); text-decoration: none; cursor: pointer;
  transition: background-color .2s, color .2s, border-color .2s;
}
.btn-primario { background: var(--primario); color: var(--fondo); }
.btn-primario:hover { background: var(--petroleo); }
.btn-primario:disabled { background: var(--texto-2); cursor: wait; }
.oscuro a.btn-claro, .btn-claro { background: var(--primario-claro); color: var(--petroleo); }
.oscuro a.btn-claro:hover { background: var(--fondo); }
.oscuro a.btn-borde, .btn-borde { border-color: var(--borde); color: var(--fondo); }
.oscuro a.btn-borde:hover { border-color: var(--primario-claro); color: var(--primario-claro); }

/* Navegación */
.nav { position: fixed; inset: 0 0 auto 0; z-index: 50; border-bottom: 1px solid var(--texto-2); }
.nav-in { display: flex; align-items: center; justify-content: space-between; min-height: var(--nav-h); flex-wrap: wrap; }
.menu { display: flex; flex-direction: column; width: 100%; padding-bottom: 1rem; gap: .25rem; }
.menu a:not(.btn) { color: var(--fondo); text-decoration: none; padding: .75rem 0; }
.menu a:not(.btn):hover { color: var(--primario-claro); }
.menu .btn { margin-top: .5rem; }
.nav-toggle { display: none; width: 48px; height: 48px; margin-right: -12px; background: none; border: 0; color: var(--fondo); cursor: pointer; }
.barras, .barras::before { content: ""; display: block; width: 24px; height: 2px; background: currentColor; margin: auto; position: relative; transition: transform .25s; }
.barras::before { position: absolute; top: -7px; left: 0; }
.barras { box-shadow: 0 7px 0 currentColor; }
.js-ready .nav-toggle { display: block; }
.js-ready .menu { display: none; }
.js-ready .nav.abierto .menu { display: flex; }
.nav.abierto .barras { box-shadow: none; transform: rotate(45deg); }
.nav.abierto .barras::before { top: 0; transform: rotate(90deg); }
.intro-on .nav .logo { opacity: 0; }

/* Intro */
.intro { display: none; }
.intro-on .intro { display: block; position: fixed; inset: 0; z-index: 100; background: var(--petroleo); transition: opacity .5s ease-out; }
.intro.sale { opacity: 0; }
.intro-logo { position: fixed; margin: 0; transform-origin: center; will-change: transform, opacity; }

/* Hero */
.hero { position: relative; min-height: 100svh; display: flex; align-items: center; padding: calc(var(--nav-h) + 3rem) 0 4rem; overflow: hidden; }
.grilla { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-in { position: relative; z-index: 1; pointer-events: none; text-align: center; }
.hero-in a { pointer-events: auto; }
.hero h1 { max-width: 20ch; margin-inline: auto; }
.acciones { display: flex; justify-content: center; margin-top: 2.25rem; }

/* Secciones */
.seccion { padding-block: var(--espacio); }
.encabezado { max-width: 44rem; margin-inline: auto; text-align: center; margin-bottom: clamp(2rem, 5vw, 3.5rem); }

.grid-2 { display: grid; gap: 1.25rem; grid-template-columns: 1fr; }

/* Bloques con linea superior y brillo */
.bloque {
  position: relative; overflow: hidden; isolation: isolate;
  background: var(--superficie); padding: clamp(1.5rem, 3vw, 2.5rem);
  box-shadow: inset 0 3px 0 var(--borde);
  --mx: 50%; --my: 50%;
}
.bloque > * { position: relative; z-index: 1; }
.bloque { text-align: center; }
.bloque h3 { margin-bottom: .75rem; }
.bloque p { color: var(--texto-2); max-width: 40ch; margin-inline: auto; }
.bloque::before {
  content: ""; position: absolute; z-index: 2; top: 0; left: 0; right: 0; height: 3px;
  background: var(--primario); transform: scaleX(0); transform-origin: left;
  transition: transform 1s cubic-bezier(.2, .6, .2, 1) .2s;
}
.bloque.in::before { transform: scaleX(1); }
.bloque::after {
  content: ""; position: absolute; z-index: 0; top: 0; left: 0; width: 360px; height: 360px;
  background: radial-gradient(circle closest-side, color-mix(in srgb, var(--primario-claro) 28%, transparent), transparent);
  transform: translate(calc(var(--mx) - 180px), calc(var(--my) - 180px));
  opacity: 0; transition: opacity .3s; pointer-events: none;
}
.bloque:hover::after { opacity: 1; }

/* Como trabajamos */
.pasos { position: relative; display: grid; gap: 2.5rem; padding-left: 2rem; }
.pasos-linea { position: absolute; left: 0; top: 0; bottom: 0; width: 2px; background: var(--borde); }
.pasos-fill { position: absolute; inset: 0; background: var(--primario); transform: scaleY(var(--p, 0)); transform-origin: top; }
.pasos li { position: relative; }
.pasos li::before { content: ""; position: absolute; left: calc(-2rem - 4px); top: .45rem; width: 10px; height: 10px; background: var(--primario); }
.pasos h3 { margin-bottom: .5rem; }
.pasos p { color: var(--texto-2); max-width: 36ch; }

/* Contacto */
.contacto { background: var(--superficie); }
.contacto-in { display: grid; gap: 3rem; }
.contacto h2 { margin-block: .75rem 1rem; }
.vias { margin-top: 2rem; display: grid; gap: 1.25rem; }
.vias .label { display: block; margin-bottom: .25rem; }
.link { font-weight: 500; overflow-wrap: anywhere; }
.form { display: grid; gap: 1.25rem; }
.campo label { display: block; font-weight: 500; margin-bottom: .4rem; }
.campo input, .campo textarea {
  width: 100%; padding: .8rem .9rem; font: inherit; color: var(--texto);
  background: var(--fondo); border: 1px solid var(--texto-2);
}
.campo textarea { resize: vertical; min-height: 9rem; }
.campo input:focus-visible, .campo textarea:focus-visible { outline-offset: 0; border-color: var(--primario); }
.campo.invalido input, .campo.invalido textarea { border-color: var(--error); border-width: 2px; }
.err { color: var(--error); font-size: .95rem; margin-top: .35rem; }
.err:empty { display: none; }
.contador { margin-top: .35rem; font-size: .9rem; color: var(--texto-2); text-align: right; }
.contador.limite { color: var(--error); }
.campo.check { display: flex; align-items: center; gap: .75rem; }
.campo.check label { margin: 0; font-weight: 400; cursor: pointer; }
.campo.check input { width: 1.25rem; height: 1.25rem; margin: 0; accent-color: var(--primario); cursor: pointer; }
.trampa { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form .btn { justify-self: start; min-width: 12rem; }
.estado { padding: 0; font-weight: 500; }
.estado:empty { display: none; }
.estado.ok { padding: 1rem; border-left: 4px solid var(--primario); background: var(--fondo); color: var(--texto); }
.estado.error { padding: 1rem; border-left: 4px solid var(--error); background: var(--fondo); color: var(--error); }
.estado.error a { color: var(--error); }

/* Footer */
.pie { padding-block: 2rem; border-top: 1px solid var(--texto-2); }
.pie-in { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: .5rem 1.5rem; text-align: center; font-size: .95rem; }
.pie-copy { color: var(--borde); }

/* Fade al scroll (solo si JS corre) */
.js-ready .reveal { opacity: 0; transform: translateY(24px); transition: opacity .8s ease-out, transform .8s ease-out; }
.js-ready .reveal.in { opacity: 1; transform: none; }

@media (min-width: 768px) {
  .grid-2 { grid-template-columns: 1fr 1fr; gap: 1.5rem; }
  .pasos { grid-template-columns: repeat(3, 1fr); gap: 2.5rem; padding: 2.5rem 0 0; }
  .pasos-linea { right: 0; bottom: auto; width: auto; height: 2px; }
  .pasos-fill { transform: scaleX(var(--p, 0)); transform-origin: left; }
  .pasos li::before { left: 0; top: calc(-2.5rem - 4px); }
}
@media (min-width: 900px) {
  .nav-in { flex-wrap: nowrap; }
  .nav-toggle, .js-ready .nav-toggle { display: none; }
  .menu, .js-ready .menu, .js-ready .nav.abierto .menu { display: flex; flex-direction: row; align-items: center; width: auto; padding: 0; gap: 2rem; }
  .menu .btn { margin: 0; min-height: 44px; padding-block: .5rem; }
  .contacto-in { grid-template-columns: 1fr 1fr; gap: 5rem; align-items: start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation: none !important; }
  .intro, .intro-on .intro { display: none !important; }
  .intro-on .nav .logo { opacity: 1; }
  .js-ready .reveal { opacity: 1; transform: none; }
  .bloque::before { transform: scaleX(1); }
  .bloque::after { display: none; }
  .pasos-fill { transform: none !important; }
}

/* Banda oscura sobre el formulario de contacto */
.banda { padding-block: clamp(3rem, 8vw, 5rem); text-align: center; }
.banda h2 { margin: 0 0 1rem; }
.banda .lead { margin: 0 auto; max-width: 48ch; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }