/* =========================================================
   VISUALINOX — Hoja de estilos compartida
   Sistema de diseño: "Ficha técnica de obra"
   ========================================================= */

:root {
  /* Color */
  --ink:        #12202B; /* acero oscuro — texto principal, headers */
  --graphite:   #4A535C; /* texto secundario */
  --paper:      #EAE8E2; /* fondo general, gris concreto (no cream) */
  --paper-dim:  #DEDCD4; /* franjas / bordes sobre paper */
  --white:      #FFFFFF;
  --oxide:      #B85C2E; /* acento corten — CTAs, hitos */
  --oxide-dark: #8A4620;
  --blue-line:  #5B7A99; /* azul de plano técnico — líneas, códigos */
  --dark-bg:    #0E1820; /* footer / secciones oscuras */
  --dark-line:  #24333F;

  /* Tipografía */
  --font-display: "Oswald", "Arial Narrow", sans-serif;
  --font-body:    "Source Sans 3", "Segoe UI", sans-serif;
  --font-mono:    "IBM Plex Mono", "Courier New", monospace;

  --radius: 2px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.01em;
  line-height: 1.08;
  margin: 0 0 0.5em;
  color: var(--ink);
}

p { margin: 0 0 1em; }
a { color: inherit; }
img { max-width: 100%; display: block; }

.mono {
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 28px;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--oxide);
  outline-offset: 3px;
}

/* ---------- Barra superior de datos (trust bar) ---------- */
.topbar {
  background: var(--dark-bg);
  color: #C9CFD4;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.03em;
}
.topbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 8px;
  padding-bottom: 8px;
  flex-wrap: wrap;
  gap: 6px;
}
.topbar a { text-decoration: none; }
.topbar a:hover { color: var(--oxide); }
.topbar .divider { color: var(--dark-line); margin: 0 10px; }

/* ---------- Header / navegación ---------- */
.site-header {
  background: var(--ink);
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 3px solid var(--oxide);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}
.logo {
  display: flex;
  align-items: baseline;
  gap: 8px;
  text-decoration: none;
  color: var(--white);
}
.logo-mark {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.logo-mark span { color: var(--oxide); }
.logo-tag {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: #93A2AC;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-left: 1px solid var(--dark-line);
  padding-left: 8px;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid #3B4750;
  color: var(--white);
  width: 42px;
  height: 42px;
  cursor: pointer;
}
.nav-toggle span,
.nav-toggle::before,
.nav-toggle::after {
  content: "";
  display: block;
  width: 20px;
  height: 2px;
  background: var(--white);
  margin: 4px auto;
}

.main-nav ul {
  list-style: none;
  display: flex;
  gap: 2px;
  margin: 0;
  padding: 0;
}
.main-nav a {
  display: block;
  padding: 10px 18px;
  text-decoration: none;
  color: #D7DCDF;
  font-family: var(--font-display);
  text-transform: uppercase;
  font-size: 15px;
  letter-spacing: 0.03em;
  border-bottom: 3px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}
.main-nav a:hover,
.main-nav a[aria-current="page"] {
  color: var(--white);
  border-color: var(--oxide);
}
.nav-cta {
  background: var(--oxide);
  color: var(--white) !important;
  margin-left: 8px;
  border-color: transparent !important;
}
.nav-cta:hover { background: var(--oxide-dark); }

/* ---------- Botones ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  font-size: 15px;
  padding: 14px 28px;
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.btn-primary { background: var(--oxide); color: var(--white); }
.btn-primary:hover { background: var(--oxide-dark); }
.btn-ghost {
  border-color: var(--ink);
  color: var(--ink);
  background: transparent;
}
.btn-ghost:hover { background: var(--ink); color: var(--white); }
.btn-ghost-light {
  border-color: rgba(255,255,255,0.5);
  color: var(--white);
  background: transparent;
}
.btn-ghost-light:hover { background: var(--white); color: var(--ink); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  background: var(--ink);
  color: var(--white);
  overflow: hidden;
  padding: 46px 0 96px;
}
.hero-grid {
  position: absolute;
  inset: 0;
  opacity: 0.16;
  background-image:
    linear-gradient(var(--blue-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--blue-line) 1px, transparent 1px);
  background-size: 42px 42px;
  pointer-events: none;
}
.hero .container {
  position: relative;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 56px;
  align-items: start;
}
.hero-eyebrow {
  font-family: var(--font-mono);
  color: var(--oxide);
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 18px;
  display: block;
}
.hero h1 {
  font-size: clamp(34px, 4.6vw, 56px);
  color: var(--white);
  max-width: 13ch;
}
.hero h1 em {
  font-style: normal;
  color: var(--oxide);
}
.hero-sub {
  color: #C6CDD1;
  font-size: 18px;
  max-width: 46ch;
  margin-bottom: 30px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 36px; }

.hero-stats {
  display: flex;
  gap: 0;
  border-top: 1px solid var(--dark-line);
  padding-top: 20px;
}
.hero-stats div { padding-right: 28px; }
.hero-stats strong {
  display: block;
  font-family: var(--font-display);
  font-size: 26px;
  color: var(--white);
}
.hero-stats span {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: #93A2AC;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

/* Diagrama técnico de portada (foto real, recortada a proporción equilibrada) */
.hero-diagram {
  border: 1px solid var(--dark-line);
  background: rgba(255,255,255,0.02);
  padding: 18px;
}
.hero-diagram-media {
  width: 100%;
  aspect-ratio: 1 / 1;
  overflow: hidden;
}
.hero-diagram svg { width: 100%; height: auto; display: block; }
.hero-diagram img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
  display: block;
}
.hero-diagram-caption {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: #93A2AC;
  letter-spacing: 0.04em;
  margin-top: 10px;
  text-transform: uppercase;
}

/* ---------- Franja de clientes / confianza ---------- */
.trust-strip {
  background: var(--white);
  border-bottom: 1px solid var(--paper-dim);
  padding: 26px 0;
}
.trust-strip .container {
  display: flex;
  align-items: center;
  gap: 28px;
  flex-wrap: wrap;
  justify-content: space-between;
}
.trust-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--graphite);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.trust-item .dot {
  width: 7px; height: 7px;
  background: var(--oxide);
  flex: none;
}

/* ---------- Secciones genéricas ---------- */
section { padding: 84px 0; }
.section-tight { padding: 64px 0; }
.section-head {
  max-width: 640px;
  margin-bottom: 48px;
}
.section-head .hero-eyebrow { color: var(--oxide-dark); }
.section-head h2 { font-size: clamp(26px, 3vw, 36px); }
.section-head p { color: var(--graphite); font-size: 17px; }

.bg-dark { background: var(--dark-bg); color: var(--white); }
.bg-dark h2, .bg-dark h3 { color: var(--white); }
.bg-dark p { color: #B7BFC4; }
.bg-white { background: var(--white); }

/* ---------- Componente firma: FICHA TÉCNICA ---------- */
.spec-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 22px;
}
.spec-card {
  background: var(--white);
  border: 1px solid var(--paper-dim);
  position: relative;
  padding: 22px 20px 20px;
  scroll-margin-top: 130px;
}
.spec-card::before,
.spec-card::after {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  border-top: 2px solid var(--blue-line);
  border-left: 2px solid var(--blue-line);
  top: 8px; left: 8px;
}
.spec-card::after {
  top: auto; left: auto;
  bottom: 8px; right: 8px;
  border-top: none; border-left: none;
  border-bottom: 2px solid var(--blue-line);
  border-right: 2px solid var(--blue-line);
}
.spec-titleblock {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  border-bottom: 1px solid var(--paper-dim);
  padding-bottom: 12px;
  margin-bottom: 16px;
  font-family: var(--font-mono);
}
.spec-code {
  font-size: 12px;
  color: var(--oxide-dark);
  font-weight: 600;
  letter-spacing: 0.05em;
}
.spec-rev {
  font-size: 10.5px;
  color: var(--graphite);
}
.spec-card h3 {
  font-size: 20px;
  margin-bottom: 10px;
}
.spec-card p {
  color: var(--graphite);
  font-size: 15.5px;
  margin-bottom: 14px;
}
.spec-list {
  list-style: none;
  margin: 0; padding: 0;
  font-size: 14px;
  color: var(--ink);
}
.spec-list li {
  padding: 6px 0;
  border-top: 1px dashed var(--paper-dim);
  display: flex;
  gap: 8px;
}
.spec-list li::before {
  content: "—";
  color: var(--oxide);
  flex: none;
}
.spec-link {
  display: inline-block;
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  text-decoration: none;
  color: var(--ink);
  border-bottom: 1px solid var(--ink);
}
.spec-link:hover { color: var(--oxide-dark); border-color: var(--oxide-dark); }

/* ---------- Proceso / etapas (secuencia real → numerado) ---------- */
.process-rail {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid var(--paper-dim);
  border-left: 1px solid var(--paper-dim);
}
.process-step {
  border-right: 1px solid var(--paper-dim);
  border-bottom: 1px solid var(--paper-dim);
  padding: 26px 22px;
}
.process-step .step-num {
  font-family: var(--font-mono);
  color: var(--oxide-dark);
  font-size: 13px;
  display: block;
  margin-bottom: 10px;
}
.process-step h4 {
  color: var(--ink);
  font-size: 17px;
  margin-bottom: 8px;
}
.process-step p { font-size: 14.5px; margin: 0; color: var(--graphite); }

/* ---------- Placeholder de imagen técnica ---------- */
.figure {
  border: 1px solid var(--paper-dim);
  background: var(--white);
}
.figure-frame {
  aspect-ratio: 4 / 3;
  background:
    repeating-linear-gradient(45deg, transparent 0 10px, rgba(91,122,153,0.08) 10px 11px),
    var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
}
.figure-frame svg { width: 46%; opacity: 0.55; }
.figure-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.figure-caption {
  display: flex;
  justify-content: space-between;
  padding: 10px 14px;
  border-top: 1px solid var(--paper-dim);
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--graphite);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

/* ---------- Ventaja diferenciadora (maestranza propia) ---------- */
.advantage {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 56px;
  align-items: center;
}
.advantage-mark {
  font-family: var(--font-mono);
  color: var(--oxide);
  font-size: 13px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 14px;
  display: block;
}

/* ---------- Two-column layout util ---------- */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
.cols-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 28px;
}

/* ---------- Valores / lista con marca ---------- */
.value-item {
  border-top: 1px solid var(--paper-dim);
  padding: 20px 0;
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 20px;
}
.value-item:last-child { border-bottom: 1px solid var(--paper-dim); }
.value-item .v-code {
  font-family: var(--font-mono);
  color: var(--oxide-dark);
  font-size: 13px;
}
.value-item h4 { font-size: 17px; margin-bottom: 6px; }
.value-item p { color: var(--graphite); font-size: 15px; margin: 0; }

/* ---------- CTA final ---------- */
.cta-band {
  background: var(--oxide);
  color: var(--white);
  padding: 64px 0;
}
.cta-band .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 32px;
  flex-wrap: wrap;
}
.cta-band h2 { color: var(--white); margin-bottom: 8px; font-size: clamp(24px,3vw,32px); }
.cta-band p { color: rgba(255,255,255,0.85); margin: 0; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--dark-bg);
  color: #9AA6AC;
  padding: 60px 0 26px;
  font-size: 14.5px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 36px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--dark-line);
}
.footer-grid h5 {
  font-family: var(--font-mono);
  color: #C9CFD4;
  text-transform: uppercase;
  font-size: 12.5px;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}
.footer-grid ul { list-style: none; margin: 0; padding: 0; }
.footer-grid li { margin-bottom: 9px; }
.footer-grid a { text-decoration: none; color: #9AA6AC; }
.footer-grid a:hover { color: var(--oxide); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  padding-top: 22px;
  font-size: 12.5px;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- Logo (imagen) ---------- */
.logo-img {
  height: 46px;
  width: auto;
  display: block;
}
.footer-logo-img {
  height: 40px;
  width: auto;
  display: block;
  margin-bottom: 14px;
}

/* ---------- Formulario de contacto ---------- */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
.form-grid .full { grid-column: 1 / -1; }
label {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--graphite);
  margin-bottom: 6px;
}
input, select, textarea {
  width: 100%;
  border: 1px solid var(--paper-dim);
  background: var(--white);
  padding: 12px 14px;
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--ink);
}
input:focus, select:focus, textarea:focus {
  outline: 2px solid var(--blue-line);
  border-color: var(--blue-line);
}
textarea { resize: vertical; min-height: 120px; }

/* ---------- Mapa / datos de contacto ---------- */
.contact-info-list { list-style: none; margin: 0; padding: 0; }
.contact-info-list li {
  padding: 16px 0;
  border-top: 1px solid var(--paper-dim);
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 16px;
}
.contact-info-list li:last-child { border-bottom: 1px solid var(--paper-dim); }
.contact-info-list .c-label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--oxide-dark);
  text-transform: uppercase;
  padding-top: 2px;
}

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .hero .container { grid-template-columns: 1fr; }
  .advantage { grid-template-columns: 1fr; gap: 32px; }
  .two-col { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .process-rail { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 760px) {
  .nav-toggle { display: block; }
  .main-nav {
    display: none;
    position: absolute;
    top: 76px; left: 0; right: 0;
    background: var(--ink);
    border-top: 1px solid var(--dark-line);
  }
  .main-nav.open { display: block; }
  .main-nav ul { flex-direction: column; gap: 0; }
  .main-nav a { padding: 16px 28px; border-bottom: 1px solid var(--dark-line); }
  .nav-cta { margin-left: 0; }
  .topbar .container { justify-content: flex-start; }
  .hero { padding: 56px 0 64px; }
  .hero-stats { flex-wrap: wrap; row-gap: 16px; }
  .footer-grid { grid-template-columns: 1fr; }
  .cta-band .container { flex-direction: column; align-items: flex-start; }
  .form-grid { grid-template-columns: 1fr; }
  .value-item { grid-template-columns: 60px 1fr; }
  .process-rail { grid-template-columns: 1fr; }
  section { padding: 56px 0; }
}