/* =========================================================
   Power Impulse — Sistema de diseño
   Paleta y tipografía en variables: para cambiar el look
   completo del sitio, edita solo el bloque :root de abajo.
   ========================================================= */

:root {
  /* Colores */
  --color-bg: #0A1628;          /* fondo general (navy oscuro) */
  --color-surface: #131F33;     /* tarjetas, header, footer (navy medio) */
  --color-surface-2: #1B2A45;   /* superficie elevada / hover */
  --color-border: #26374F;      /* líneas divisorias sutiles */
  --color-brand: #3E7CB8;       /* azul de marca */
  --color-brand-light: #6FA3D6; /* azul de marca, versión clara (links/hover) */
  --color-accent: #F2A93B;      /* ámbar — CTA y señal */
  --color-accent-dark: #C6841D; /* ámbar oscuro — hover de CTA */
  --color-text: #F4F6F9;        /* texto principal / títulos */
  --color-text-muted: #C9D2DE;  /* texto secundario sobre fondo oscuro */
  --color-text-dim: #8C9AB3;    /* texto terciario / notas */
  --color-error: #E5484D;       /* rojo — errores de validación de formularios */

  /* Tipografía */
  --font-sans: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

  /* Layout */
  --max-width: 1160px;
  --radius: 10px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

/* ---------- Reset básico ---------- */
* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text-muted);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: var(--color-brand-light);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

h1, h2, h3, h4 {
  color: var(--color-text);
  line-height: 1.25;
  margin: 0 0 0.5em;
}

h1 { font-size: clamp(2rem, 4vw, 2.75rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
h3 { font-size: 1.25rem; }

p { margin: 0 0 1em; }

ul { padding-left: 1.2em; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Cifras destacadas (kVA, años, premios) en monoespaciada */
.stat,
.figure {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--color-accent);
  margin-left: -0.08em;
  word-spacing: -0.15em;
}

/* ---------- Botones ---------- */
.btn {
  display: inline-block;
  padding: 0.75em 1.5em;
  border-radius: var(--radius);
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none !important;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.btn-primary {
  background: var(--color-accent);
  color: #1A1200;
}

.btn-primary:hover {
  background: var(--color-accent-dark);
}

.btn-secondary {
  background: transparent;
  border-color: var(--color-brand-light);
  color: var(--color-text);
}

.btn-secondary:hover {
  background: var(--color-surface-2);
}

.btn-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* ---------- Header / Navegación ---------- */
.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav-logo img {
  display: block;
}

.logo-appcore {
  height: 64px;
  width: auto;
}

.logo-powerimpulse {
  height: 64px;
  width: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links > li {
  position: relative;
}

.nav-links a {
  color: var(--color-text-muted);
  font-weight: 500;
  font-size: 0.95rem;
}

.nav-links a:hover {
  color: var(--color-text);
  text-decoration: none;
}

/* Resalta en el menú superior la sección donde está parado el usuario. */
.nav-links > li > a.active {
  color: var(--color-accent);
  font-weight: 700;
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 20px;
}

/* Submenú desplegable (solo CSS, sin JS).
   Sin espacio entre el link y el menú: un hueco ahí rompe el :hover
   en cuanto el mouse lo cruza y el menú se cierra solo. */
.has-dropdown .dropdown {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  margin: 0;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 10px;
  min-width: 240px;
  box-shadow: var(--shadow);
  list-style: none;
}

.has-dropdown:hover .dropdown,
.has-dropdown:focus-within .dropdown {
  display: block;
}

.dropdown li a {
  display: block;
  padding: 8px 10px;
  border-radius: 6px;
  font-size: 0.9rem;
}

.dropdown li a:hover {
  background: var(--color-surface);
  text-decoration: none;
}

/* Submenú de segundo nivel (ej. Sistemas UPS dentro de Productos).
   Mismo truco de "sin espacio" que el primer nivel, pero abriendo
   hacia el lado (left: 100%) en vez de hacia abajo. */
.has-dropdown-sub {
  position: relative;
}

.submenu {
  display: none;
  position: absolute;
  top: 0;
  left: 100%;
  margin: 0;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 10px;
  min-width: 220px;
  box-shadow: var(--shadow);
  list-style: none;
}

.has-dropdown-sub:hover .submenu,
.has-dropdown-sub:focus-within .submenu {
  display: block;
}

/* Menú móvil (checkbox hack, sin JavaScript) */
.nav-toggle {
  display: none;
}

.nav-toggle-label {
  display: none;
  cursor: pointer;
  font-size: 1.6rem;
  color: var(--color-text);
}

@media (max-width: 860px) {
  .nav-toggle-label {
    display: block;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 16px 24px;
    gap: 4px;
  }

  .nav-toggle:checked ~ .nav-links {
    display: flex;
  }

  .has-dropdown .dropdown {
    position: static;
    box-shadow: none;
    display: block;
    border: none;
    background: transparent;
    padding-left: 12px;
  }

  .submenu {
    position: static;
    box-shadow: none;
    display: block;
    border: none;
    background: transparent;
    padding-left: 12px;
    min-width: 0;
  }

}

/* ---------- Hero ---------- */
.hero {
  padding: 80px 0 64px;
  background:
    radial-gradient(circle at 80% 0%, rgba(62, 124, 184, 0.18), transparent 55%),
    var(--color-bg);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-accent);
  background: rgba(242, 169, 59, 0.1);
  border: 1px solid rgba(242, 169, 59, 0.3);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 20px;
}

.hero p.lead {
  font-size: 1.15rem;
  max-width: 640px;
}

/* ---------- Secciones y tarjetas ---------- */
.section {
  padding: 64px 0;
}

.section-alt {
  background: var(--color-surface);
}

.section-head {
  max-width: 680px;
  margin-bottom: 40px;
}

.grid {
  display: grid;
  gap: 24px;
}

.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

@media (max-width: 860px) {
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
}

.card-icon {
  font-size: 1.8rem;
  margin-bottom: 12px;
  display: block;
}

.card a.card-link {
  display: inline-block;
  margin-top: 12px;
  font-weight: 600;
}

/* ---------- Chips (industrias) ---------- */
.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.chip {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 0.9rem;
}

/* ---------- Clientes (texto plano) ---------- */
.clients-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  color: var(--color-text-dim);
  font-size: 0.95rem;
}

/* ---------- Breadcrumb ---------- */
.breadcrumb {
  font-size: 0.85rem;
  color: var(--color-text-dim);
  padding: 16px 0 0;
}

.breadcrumb a {
  color: var(--color-text-dim);
}

/* ---------- Badge de categoría ---------- */
.badge {
  display: inline-block;
  background: rgba(62, 124, 184, 0.15);
  border: 1px solid rgba(62, 124, 184, 0.4);
  color: var(--color-brand-light);
  font-size: 0.8rem;
  padding: 5px 12px;
  border-radius: 999px;
  margin-bottom: 16px;
}

/* ---------- Problemas (ícono + título + detalle) ---------- */
.problem-card h3 {
  margin-bottom: 8px;
}

/* ---------- Formulario de contacto ---------- */
.form-field {
  margin-bottom: 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-field label {
  font-size: 0.9rem;
  color: var(--color-text);
  font-weight: 600;
}

.form-field input,
.form-field select,
.form-field textarea {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 10px 12px;
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  resize: none;
}

.form-field textarea::placeholder {
  color: var(--color-text-dim);
}

.checkbox-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.checkbox-option {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 400;
  color: var(--color-text);
  cursor: pointer;
}

.checkbox-option input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--color-accent);
  cursor: pointer;
}

.form-commitment {
  background: rgba(242, 169, 59, 0.12);
  border: 1px solid rgba(242, 169, 59, 0.45);
  border-left: 4px solid var(--color-accent);
  border-radius: 8px;
  padding: 14px 16px;
  margin-bottom: 18px;
}

.form-commitment-title {
  color: var(--color-accent);
  font-weight: 700;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin-bottom: 4px;
}

.form-commitment p:last-child {
  color: var(--color-text);
  font-size: 0.95rem;
  margin: 0;
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: 2px solid var(--color-brand);
  outline-offset: 1px;
}

.form-field input[type="number"]::-webkit-inner-spin-button,
.form-field input[type="number"]::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.form-field input[type="number"] {
  -moz-appearance: textfield;
}

.form-hint {
  color: var(--color-text-dim);
  font-size: 0.82rem;
  margin: 0;
}

.toggle-group {
  display: flex;
  gap: 8px;
}

.toggle-option {
  flex: 1;
  padding: 10px 12px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  color: var(--color-text-dim);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.toggle-option:hover {
  border-color: var(--color-brand-light);
}

.toggle-option.active {
  background: var(--color-brand);
  border-color: var(--color-brand);
  color: var(--color-text);
  font-weight: 600;
}

.field-error {
  color: var(--color-error);
  font-size: 0.82rem;
  margin: 0;
  min-height: 0;
}

.form-alert {
  background: rgba(229, 72, 77, 0.12);
  border: 1px solid rgba(229, 72, 77, 0.45);
  border-left: 4px solid var(--color-error);
  border-radius: 8px;
  padding: 14px 16px;
  margin-bottom: 16px;
}

.form-alert p {
  color: var(--color-text);
  font-size: 0.95rem;
  margin: 0;
}

.field-error:empty {
  display: none;
}

.form-field input.field-invalid,
.form-field select.field-invalid {
  border-color: var(--color-error);
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 48px 0 24px;
  margin-top: 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 32px;
}

@media (max-width: 860px) {
  .footer-grid { grid-template-columns: 1fr; }
}

.footer-grid h4 {
  color: var(--color-text);
  font-size: 0.95rem;
  margin-bottom: 14px;
}

.footer-grid ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-grid li {
  margin-bottom: 8px;
}

.footer-grid a {
  color: var(--color-text-dim);
  font-size: 0.9rem;
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.85rem;
  color: var(--color-text-dim);
}

.footer-appcore {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.footer-appcore-logo {
  height: 56px;
  width: auto;
}

/* ---------- CTA de cierre ---------- */
.cta-band {
  background: linear-gradient(135deg, var(--color-surface-2), var(--color-surface));
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: 56px 0;
  text-align: center;
}

.cta-band h2 {
  margin-bottom: 12px;
}

.cta-band p {
  max-width: 560px;
  margin: 0 auto 28px;
}

.cta-band .btn-row {
  justify-content: center;
}

/* ---------- Modelos disponibles (tarjetas por serie/línea) ---------- */
.scroll-hint {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-text-dim);
  margin-bottom: 18px;
}

.scroll-hint .arrow {
  color: var(--color-accent);
  animation: nudge 1.6s ease-in-out infinite;
}

@keyframes nudge {
  0%, 100% { transform: translateX(0); }
  50% { transform: translateX(5px); }
}

.rail {
  display: flex;
  align-items: stretch;
  gap: 20px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding-bottom: 14px;
  margin: 0 -4px;
  padding-left: 4px;
  padding-right: 4px;
}

.rail-centered {
  justify-content: center;
}

.rail::-webkit-scrollbar { height: 8px; }
.rail::-webkit-scrollbar-track { background: var(--color-surface); border-radius: 999px; }
.rail::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 999px; }
.rail::-webkit-scrollbar-thumb:hover { background: var(--color-brand); }

.category-card {
  flex: 0 0 auto;
  scroll-snap-align: start;
  width: calc(33.333% - 14px);
  min-width: 260px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

@media (max-width: 720px) {
  .category-card { width: 85%; }
}

.category-card-head {
  display: flex;
  gap: 16px;
  align-items: center;
}

.category-image-real {
  flex: 0 0 auto;
  width: 96px;
  height: 72px;
  object-fit: contain;
  border-radius: 8px;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  padding: 4px;
}

.category-card h3 {
  color: var(--color-text);
  font-size: 1.4rem;
  margin: 0 0 4px;
}

.category-tagline {
  font-size: 0.85rem;
  color: var(--color-text-dim);
  margin: 0;
}

.spec-block {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.ficha-hint {
  font-size: 0.72rem;
  font-style: italic;
  color: var(--color-text-dim);
  margin: 0 0 4px;
}

.spec-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin: 0 0 2px;
}

.spec-block ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.spec-block li {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  padding: 5px 12px;
  border-radius: 999px;
}

.spec-block.lineas li {
  color: var(--color-text);
  font-weight: 600;
  border-color: rgba(62, 124, 184, 0.4);
}

.spec-block.lineas li a {
  color: inherit;
  text-decoration: none;
}

.spec-block.lineas li:has(a) {
  border-color: var(--color-brand-light);
}

.spec-block.lineas li a:hover {
  color: var(--color-brand-light);
  text-decoration: underline;
}

.spec-block.voltajes li {
  color: var(--color-brand-light);
  border-color: rgba(111, 163, 214, 0.4);
}