/* =========================================================================
   ENERGY ALLIANCE — HOJA DE ESTILOS PRINCIPAL
   Identidad: sobriedad corporativa ALLIANCE + colores oficiales Energy Alliance
   Tipografías: Poppins (títulos) / Manrope (cuerpo)
   ========================================================================= */

:root {
  /* Paleta base — derivada del logo oficial Energy Alliance y azul marino ALLIANCE */
  --ea-navy: #0A1F44;         /* Azul marino corporativo ALLIANCE */
  --ea-navy-dark: #071530;
  --ea-blue: #2E3A8C;         /* Azul "Alliance" del logotipo Energy Alliance */
  --ea-blue-light: #4C56C6;   /* Azul-violeta "Energy" del logotipo */
  --ea-teal: #1FA6A6;         /* Acento turquesa (identidad ALLIANCE) */
  --ea-teal-dark: #167E7E;

  --ea-bg: #FFFFFF;
  --ea-bg-soft: #F6F8FB;
  --ea-bg-gray: #EEF1F6;
  --ea-border: #E1E6ED;

  --ea-text: #14213D;
  --ea-text-body: #46516B;
  --ea-text-muted: #6B7690;
  --ea-white: #FFFFFF;

  --font-heading: 'Poppins', 'Segoe UI', sans-serif;
  --font-body: 'Manrope', 'Segoe UI', sans-serif;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --shadow-sm: 0 2px 8px rgba(10, 31, 68, 0.06);
  --shadow-md: 0 8px 24px rgba(10, 31, 68, 0.10);
  --shadow-lg: 0 16px 48px rgba(10, 31, 68, 0.14);

  --max-width: 1200px;
  --transition: 0.25s ease;
}

/* ---------- Reset y base ---------- */
*, *::before, *::after { box-sizing: border-box; }
/* Corrección de causa raíz del defecto de overflow horizontal en Safari iOS:
   los elementos con `position: fixed` (ej. el panel de navegación móvil,
   oculto con `transform: translateX(100%)` cuando está cerrado) siguen
   contribuyendo al "scrollable overflow" del documento salvo que el elemento
   raíz (`html`) los recorte explícitamente. Sin esta regla en `html`, Safari
   detecta un documento más ancho que el viewport y aplica su propio
   "shrink-to-fit" (reduce el zoom de toda la página), generando la franja
   blanca lateral y el encabezado comprimido reportados en iPhone. Recortar
   solo en `body` no es suficiente porque los elementos `fixed` se posicionan
   respecto al viewport/`html`, no respecto a `body`. */
html {
  scroll-behavior: smooth;
  overflow-x: hidden;
  /* overflow-x:hidden detiene el scroll/zoom visual, pero en algunos motores
     de renderizado un elemento `position:fixed` desplazado fuera de pantalla
     con `transform` (como el panel del menú cerrado) sigue sumando a
     scrollWidth. `overflow-x: clip` es la propiedad diseñada exactamente
     para excluir ese contenido del cálculo de "scrollable overflow" del
     documento. Los navegadores que no la soportan simplemente la ignoran y
     conservan el `hidden` anterior como respaldo. */
  overflow-x: clip;
  max-width: 100%;
  width: 100%;
}
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ea-text-body);
  background: var(--ea-bg);
  line-height: 1.65;
  overflow-x: hidden;
  overflow-x: clip;
  max-width: 100%;
  width: 100%;
  -webkit-font-smoothing: antialiased;
  position: relative;
}
img { max-width: 100%; height: auto; display: block; }
.responsive-picture { display: block; width: 100%; }
.responsive-picture img { display: block; width: 100%; height: auto; }
a { color: var(--ea-blue); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--ea-teal-dark); }
ul { padding: 0; margin: 0; list-style: none; }
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--ea-navy);
  line-height: 1.25;
  margin: 0 0 16px;
  font-weight: 600;
}
h1 { font-size: clamp(2rem, 4.2vw, 3.1rem); font-weight: 700; }
h2 { font-size: clamp(1.6rem, 3vw, 2.3rem); }
h3 { font-size: 1.25rem; }
p { margin: 0 0 16px; }
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  padding-left: max(24px, env(safe-area-inset-left));
  padding-right: max(24px, env(safe-area-inset-right));
  box-sizing: border-box;
}
section { padding: 88px 0; }
.section-tight { padding: 56px 0; }
.section-alt { background: var(--ea-bg-soft); }
.section-navy { background: var(--ea-navy); color: rgba(255,255,255,0.88); }
.section-navy h2, .section-navy h3 { color: #fff; }
.section-navy a { color: #9FD8D8; }

/* Foco visible accesible */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible {
  outline: 3px solid var(--ea-teal);
  outline-offset: 2px;
  border-radius: 4px;
}
.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 2000;
  background: var(--ea-navy); color: #fff; padding: 10px 18px; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

/* ---------- Utilidades ---------- */
.eyebrow {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ea-teal-dark);
  font-weight: 600;
  margin-bottom: 14px;
}
.section-head { max-width: 760px; margin: 0 0 48px; }
.section-head.center { margin-inline: auto; text-align: center; }
.text-muted { color: var(--ea-text-muted); }
.lead { font-size: 1.15rem; color: var(--ea-text-body); }
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--ea-bg-gray); color: var(--ea-navy);
  font-size: 0.78rem; font-weight: 600; padding: 5px 12px;
  border-radius: 999px; font-family: var(--font-heading);
}
.grid { display: grid; gap: 28px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ---------- Botones ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}
.btn-primary { background: var(--ea-teal); color: #fff; }
.btn-primary:hover { background: var(--ea-teal-dark); color: #fff; }
.btn-outline { background: transparent; color: #fff; border-color: rgba(255,255,255,0.55); }
.btn-outline:hover { background: rgba(255,255,255,0.12); border-color: #fff; color: #fff; }
.btn-navy { background: var(--ea-navy); color: #fff; }
.btn-navy:hover { background: var(--ea-navy-dark); color: #fff; }
.btn-ghost { background: transparent; color: var(--ea-navy); border-color: var(--ea-border); }
.btn-ghost:hover { border-color: var(--ea-navy); color: var(--ea-navy); }
.btn-block { width: 100%; }
.cta-row { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 28px; }

/* =========================================================================
   HEADER / NAVEGACIÓN
   ========================================================================= */
.site-header {
  position: sticky; top: 0; z-index: 900;
  width: 100%;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--ea-border);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 14px; padding-bottom: 14px; gap: 20px;
  flex-wrap: nowrap;
  min-width: 0; /* permite que los hijos flex se encojan en vez de desbordar */
}
.logo-link { flex-shrink: 1; min-width: 0; overflow: hidden; }
.logo-img { height: 34px; width: auto; max-width: 100%; }
/* En escritorio, .main-nav es una fila que contiene el <ul> de enlaces y
   (tras la reubicación por JS en js/main.js) el selector de idioma
   ES/EN/中文, para que el resultado visual sea idéntico al diseño
   aprobado. En móvil/tablet, css/responsive.css convierte este mismo
   elemento en el panel deslizante (drawer) y anula este display:flex
   en fila para apilar verticalmente enlaces + selector de idioma. */
.main-nav {
  display: flex; align-items: center; gap: 22px;
}
.main-nav ul {
  display: flex; align-items: center; gap: 18px; flex-wrap: nowrap;
  min-width: 0;
}
.main-nav a {
  font-family: var(--font-heading);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--ea-text);
  padding: 8px 2px;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}
.main-nav a:hover, .main-nav a[aria-current="page"] {
  color: var(--ea-navy);
  border-bottom-color: var(--ea-teal);
}
.main-nav a.nav-cta {
  background: var(--ea-navy); color: #fff !important; padding: 9px 18px;
  border-radius: var(--radius-sm); border-bottom: none;
}
.main-nav a.nav-cta:hover { background: var(--ea-teal-dark); }

/* Dropdown 'Solutions / Soluciones' */
.nav-item-dropdown { position: relative; }
.nav-dropdown-trigger {
  display: inline-flex; align-items: center; gap: 5px;
  font-family: var(--font-heading); font-size: 0.88rem; font-weight: 500;
  color: var(--ea-text); background: none; border: none; cursor: pointer;
  padding: 8px 2px; border-bottom: 2px solid transparent;
}
.nav-dropdown-trigger:hover, .nav-item-dropdown.open .nav-dropdown-trigger {
  color: var(--ea-navy); border-bottom-color: var(--ea-teal);
}
.nav-dropdown-trigger .caret { font-size: 0.65rem; transition: transform var(--transition); }
.nav-item-dropdown.open .nav-dropdown-trigger .caret { transform: rotate(180deg); }
.nav-dropdown-panel {
  display: none; position: absolute; top: calc(100% + 10px); left: 0;
  background: #fff; border: 1px solid var(--ea-border); border-radius: var(--radius-md);
  box-shadow: var(--shadow-md); min-width: 260px; padding: 10px; z-index: 950;
}
.nav-item-dropdown.open .nav-dropdown-panel { display: block; }
.nav-dropdown-panel a {
  display: block; padding: 10px 14px; border-radius: var(--radius-sm);
  font-size: 0.86rem; font-weight: 500; color: var(--ea-text); border-bottom: none;
}
.nav-dropdown-panel a:hover { background: var(--ea-bg-gray); color: var(--ea-navy); }

.header-actions { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.lang-switch-group { display: flex; align-items: center; gap: 4px; }
.lang-switch {
  font-family: var(--font-heading); font-weight: 700; font-size: 0.78rem;
  border: 1.5px solid var(--ea-border); border-radius: 999px; padding: 5px 10px;
  color: var(--ea-navy);
}
.lang-switch.current { background: var(--ea-navy); color: #fff; border-color: var(--ea-navy); }
.lang-switch:hover { border-color: var(--ea-teal); color: var(--ea-teal-dark); }
.lang-switch.current:hover { color: #fff; }
.lang-sep { color: var(--ea-border); font-size: 0.78rem; }
.menu-toggle {
  display: none; background: none; border: none; cursor: pointer;
  width: 40px; height: 40px; flex-direction: column; justify-content: center;
  align-items: center; gap: 5px; padding: 0;
}
.menu-toggle span { width: 24px; height: 2.5px; background: var(--ea-navy); border-radius: 2px; transition: var(--transition); }

/* Breadcrumbs */
.breadcrumbs {
  background: var(--ea-bg-soft);
  border-bottom: 1px solid var(--ea-border);
  padding: 12px 0;
  font-size: 0.85rem;
}
.breadcrumbs ol { display: flex; gap: 8px; flex-wrap: wrap; }
.breadcrumbs li { display: flex; align-items: center; gap: 8px; color: var(--ea-text-muted); }
.breadcrumbs a { color: var(--ea-text-muted); }
.breadcrumbs a:hover { color: var(--ea-teal-dark); }
.breadcrumbs li[aria-current] { color: var(--ea-navy); font-weight: 600; }

/* =========================================================================
   HERO
   ========================================================================= */
.hero {
  position: relative;
  width: 100%;
  background: linear-gradient(120deg, var(--ea-navy) 45%, var(--ea-navy-dark) 100%);
  color: #fff;
  overflow: hidden;
  padding: 0;
}
.hero-inner {
  display: grid; grid-template-columns: 1.05fr 0.95fr; align-items: center;
  gap: 48px; padding: 72px 24px 72px;
  padding-left: max(24px, env(safe-area-inset-left));
  padding-right: max(24px, env(safe-area-inset-right));
  max-width: var(--max-width); margin: 0 auto;
  width: 100%;
  box-sizing: border-box;
}
.hero-copy .eyebrow { color: #7FD8D8; }
.hero h1 { color: #fff; margin-bottom: 20px; font-size: clamp(1.9rem, 3.4vw, 2.65rem); max-width: 640px; }
.hero-lead { color: rgba(255,255,255,0.86); font-size: 1.1rem; max-width: 560px; }
.hero-media { position: relative; border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg); }
.hero-media img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 4/3; }
.hero-media::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(200deg, rgba(10,31,68,0.05), rgba(10,31,68,0.35));
}
.page-hero {
  background: linear-gradient(120deg, var(--ea-navy) 40%, var(--ea-blue) 130%);
  color: #fff; padding: 72px 0 64px;
}
.page-hero h1 { color: #fff; }
.page-hero .lead { color: rgba(255,255,255,0.85); max-width: 720px; }
.page-hero .eyebrow { color: #7FD8D8; }

/* =========================================================================
   TARJETAS
   ========================================================================= */
.card {
  background: #fff;
  border: 1px solid var(--ea-border);
  border-radius: var(--radius-md);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
  height: 100%;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.card-icon {
  width: 52px; height: 52px; border-radius: var(--radius-sm);
  background: var(--ea-bg-gray); display: flex; align-items: center; justify-content: center;
  color: var(--ea-teal-dark); font-size: 1.4rem; margin-bottom: 18px;
}
.card h3 { margin-bottom: 10px; }
.card p:last-child { margin-bottom: 0; }
.card-link { display: inline-flex; align-items: center; gap: 6px; font-family: var(--font-heading); font-weight: 600; font-size: 0.9rem; margin-top: 12px; }

.audience-card { border-top: 4px solid var(--ea-teal); }
.audience-card.gov { border-top-color: var(--ea-blue); }
.audience-card.intl { border-top-color: var(--ea-navy); }

/* Método — pasos numerados */
.steps-list { display: grid; gap: 20px; }
.step-item {
  display: grid; grid-template-columns: 60px 1fr; gap: 20px;
  padding: 22px 0; border-bottom: 1px solid var(--ea-border);
}
.step-item:last-child { border-bottom: none; }
.step-num {
  font-family: var(--font-heading); font-weight: 700; font-size: 1.4rem;
  color: var(--ea-teal); display: flex; align-items: flex-start;
}
.step-item h3 { margin-bottom: 6px; }

/* Caso ENGIE */
.case-block {
  display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center;
}
.case-media { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-md); }
.case-media img { width: 100%; }
.case-list { margin: 20px 0; display: grid; gap: 10px; }
.case-list li { display: flex; gap: 10px; align-items: flex-start; }
.case-list li::before { content: "✓"; color: var(--ea-teal-dark); font-weight: 700; flex-shrink: 0; }
.disclaimer-box {
  background: var(--ea-bg-gray); border-left: 4px solid var(--ea-navy);
  border-radius: var(--radius-sm); padding: 18px 22px; font-size: 0.9rem; color: var(--ea-text-body);
  margin-top: 20px;
}
.sources-note { font-size: 0.82rem; color: var(--ea-text-muted); margin-top: 14px; }
.sources-note a { color: var(--ea-text-muted); text-decoration: underline; }

/* Métricas */
.metrics-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; text-align: center; }
.metric-box .metric-value {
  font-family: var(--font-heading); font-weight: 700; font-size: 2.4rem; color: var(--ea-teal);
  display: block;
}
.metric-box .metric-label { font-size: 0.86rem; color: rgba(255,255,255,0.75); margin-top: 6px; }

/* Ecosistema */
.eco-card { display: flex; flex-direction: column; gap: 10px; }
.eco-card .eco-logo { height: 30px; width: auto; object-fit: contain; margin-bottom: 8px; }
.eco-card .eco-role { font-family: var(--font-heading); font-weight: 600; font-size: 0.82rem; color: var(--ea-teal-dark); text-transform: uppercase; letter-spacing: 0.04em; }

/* Insignia de logo con fondo (ej. Oil & Gas Alliance) — el padding va en el
   contenedor, nunca en el <img>, para no alterar su relación de aspecto natural. */
.brand-logo-badge {
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--ea-navy); padding: 6px 10px; border-radius: 6px;
  margin-bottom: 16px; box-sizing: content-box;
}
.brand-logo-badge img {
  height: 34px; width: auto; max-width: 100%; object-fit: contain; display: block;
}

/* Cierre / CTA final */
.cta-final { text-align: center; padding: 96px 0; background: var(--ea-navy); color: #fff; }
.cta-final h2 { color: #fff; max-width: 720px; margin: 0 auto 28px; }
.cta-final .cta-row { justify-content: center; }

/* =========================================================================
   FORMULARIOS
   ========================================================================= */
.contact-form { display: grid; gap: 18px; max-width: 640px; }
.form-row { display: grid; gap: 8px; }
.form-row label { font-family: var(--font-heading); font-size: 0.88rem; font-weight: 600; color: var(--ea-navy); }
.form-row input, .form-row select, .form-row textarea {
  padding: 13px 16px; border: 1.5px solid var(--ea-border); border-radius: var(--radius-sm);
  font-family: var(--font-body); font-size: 0.95rem; color: var(--ea-text);
  background: #fff;
}
.form-row textarea { resize: vertical; min-height: 120px; }
.form-note {
  background: var(--ea-bg-gray); border-radius: var(--radius-sm); padding: 16px 20px;
  font-size: 0.88rem; color: var(--ea-text-body); margin-bottom: 24px;
}
.contact-alt {
  margin-top: 32px; padding-top: 28px; border-top: 1px solid var(--ea-border);
  display: grid; gap: 10px;
}
.contact-alt a { font-weight: 600; }

/* =========================================================================
   FOOTER
   ========================================================================= */
.site-footer { background: var(--ea-navy-dark); color: rgba(255,255,255,0.75); padding: 72px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 48px; border-bottom: 1px solid rgba(255,255,255,0.12); }
.footer-brand .footer-logo { height: 30px; margin-bottom: 16px; filter: brightness(0) invert(1); }
.footer-brand p { font-size: 0.86rem; color: rgba(255,255,255,0.6); }
.site-footer h3 { color: #fff; font-size: 0.9rem; text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 18px; }
.site-footer nav ul { display: grid; gap: 10px; }
.site-footer nav a { color: rgba(255,255,255,0.68); font-size: 0.9rem; }
.site-footer nav a:hover { color: #fff; }
.footer-bottom { padding: 22px 24px; font-size: 0.8rem; color: rgba(255,255,255,0.5); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }

/* =========================================================================
   PÁGINA 404
   ========================================================================= */
.error-page { min-height: 60vh; display: flex; align-items: center; justify-content: center; text-align: center; padding: 100px 24px; }
.error-code { font-family: var(--font-heading); font-size: 5rem; font-weight: 700; color: var(--ea-teal); margin-bottom: 10px; }

/* Two-column content blocks reused across inner pages */
.split-block { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.split-block img { border-radius: var(--radius-lg); box-shadow: var(--shadow-md); width: 100%; }
.checklist { display: grid; gap: 12px; margin: 20px 0; }
.checklist li { display: flex; gap: 10px; align-items: flex-start; }
.checklist li::before { content: "→"; color: var(--ea-teal-dark); font-weight: 700; flex-shrink: 0; }

.pill-list { display: flex; flex-wrap: wrap; gap: 10px; }
.pill-list li {
  background: var(--ea-bg-gray); border-radius: 999px; padding: 8px 16px;
  font-size: 0.85rem; font-weight: 600; color: var(--ea-navy); font-family: var(--font-heading);
}

.quote-block {
  border-left: 4px solid var(--ea-teal); padding: 4px 0 4px 28px; margin: 32px 0;
  font-family: var(--font-heading); font-size: 1.25rem; color: var(--ea-navy); font-weight: 500;
}

.table-responsive { overflow-x: auto; }
table.matrix { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
table.matrix th, table.matrix td { border: 1px solid var(--ea-border); padding: 10px 14px; text-align: left; }
table.matrix th { background: var(--ea-bg-gray); font-family: var(--font-heading); }