/* ==========================================================================
   SISTELNET (sistelnet.es) - HOJA DE ESTILOS CORPORATIVA DE ALTA INGENIERÍA
   Sistemas Telemáticos, Telecomunicaciones, Redes y Posicionamiento SEO B2B
   Identidad del Reino de León / País Leonés (León, Zamora y Salamanca)
   ========================================================================== */

:root {
  /* Paleta Institucional: Púrpura Real Leonés, Oro Heráldico y Azul Ingeniería */
  --color-leon-purple: #7D1038;
  --color-leon-purple-dark: #580926;
  --color-leon-purple-light: #FDF2F6;
  --color-leon-gold: #D97706;
  --color-leon-gold-hover: #B45309;
  --color-leon-gold-light: #FEF3C7;
  
  --color-primary-dark: #0B1120;
  --color-secondary-dark: #1E293B;
  --color-accent: #1D4ED8;
  --color-accent-hover: #1E40AF;
  
  --color-bg-light: #F8FAFC;
  --color-bg-white: #FFFFFF;
  --color-text-main: #0F172A;
  --color-text-muted: #475569;
  --color-border: #E2E8F0;
  --color-success: #059669;
  
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-heading: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
  
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 22px;
  
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 12px -1px rgba(15, 23, 42, 0.08), 0 2px 6px -1px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 12px 28px -4px rgba(15, 23, 42, 0.12), 0 4px 12px -2px rgba(15, 23, 42, 0.06);
  --shadow-xl: 0 20px 36px -6px rgba(15, 23, 42, 0.18);
  
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text-main);
  background-color: var(--color-bg-light);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Contenedor con márgenes laterales generosos (Regla obligatoria) */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding-left: 32px;
  padding-right: 32px;
}

@media (max-width: 992px) {
  .container {
    padding-left: 24px;
    padding-right: 24px;
  }
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-primary-dark);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

p {
  margin-bottom: 1rem;
  color: var(--color-text-muted);
}

p:last-child {
  margin-bottom: 0;
}

/* ==========================================================================
   CABECERA Y MENÚ EN UNA SOLA LÍNEA (GARANTIZADO)
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  width: 100%;
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
  flex-wrap: nowrap;
  gap: 16px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex-shrink: 0;
}

.logo-heraldic {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.brand-logo:hover .logo-heraldic {
  transform: scale(1.04);
}

.logo-heraldic img, .logo-heraldic svg {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.logo-text {
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.brand-name {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-primary-dark);
  letter-spacing: -0.02em;
  line-height: 1.05;
}

.brand-tagline {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-leon-purple);
  margin-top: 2px;
}

.main-nav {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.main-nav .nav-list {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 16px;
  flex-wrap: nowrap;
  white-space: nowrap;
  margin: 0;
  padding: 0;
}

.nav-link {
  text-decoration: none;
  color: var(--color-text-main);
  font-size: 0.87rem;
  font-weight: 600;
  padding: 8px 4px;
  position: relative;
  white-space: nowrap;
  transition: color var(--transition-fast);
}

.nav-link:hover, .nav-link.active {
  color: var(--color-leon-purple);
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2.5px;
  background-color: var(--color-leon-purple);
  border-radius: 2px;
}

.header-action {
  flex-shrink: 0;
}

/* Botones */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 11px 22px;
  font-size: 0.92rem;
  font-weight: 700;
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  cursor: pointer;
  border: 1px solid transparent;
  line-height: 1.3;
  text-align: center;
  white-space: normal;
  max-width: 100%;
}

.header-action .btn { white-space: nowrap; }

.btn-purple {
  background-color: var(--color-leon-purple);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(125, 16, 56, 0.25);
}

.btn-purple:hover {
  background-color: var(--color-leon-purple-dark);
  transform: translateY(-1px);
}

.btn-gold {
  background-color: var(--color-leon-gold);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(217, 119, 6, 0.3);
}

.btn-gold:hover {
  background-color: var(--color-leon-gold-hover);
  transform: translateY(-1px);
}

.btn-outline {
  background-color: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.28);
  color: #ffffff;
}

.btn-outline:hover {
  background-color: rgba(255, 255, 255, 0.14);
  border-color: #ffffff;
}

.btn-lg {
  padding: 14px 28px;
  font-size: 1rem;
}

.btn-sm {
  padding: 9px 16px;
  font-size: 0.84rem;
}

.btn-block {
  display: flex;
  width: 100%;
}

.mobile-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-around;
  width: 36px;
  height: 36px;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 7px;
  flex-shrink: 0;
}

.mobile-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background-color: var(--color-primary-dark);
  border-radius: 2px;
}

/* ==========================================================================
   HERO DE INGENIERÍA (CERO IMÁGENES IA CUTRES - ARQUITECTURA VECTORIAL PURA)
   ========================================================================== */
.hero-section {
  position: relative;
  color: #ffffff;
  padding: 76px 0 68px 0;
  background-color: #070C18;
  background-image: 
    radial-gradient(circle at 15% 20%, rgba(125, 16, 56, 0.32) 0%, transparent 45%),
    radial-gradient(circle at 85% 75%, rgba(217, 119, 6, 0.18) 0%, transparent 45%),
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 40px 40px, 40px 40px;
  border-bottom: 3px solid var(--color-leon-purple);
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 44px;
  align-items: center;
}

.hero-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  max-width: 920px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(125, 16, 56, 0.45);
  border: 1px solid rgba(251, 191, 36, 0.45);
  border-radius: 999px;
  color: #FDE68A;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  margin-bottom: 20px;
}

.hero-title {
  color: #ffffff;
  font-size: clamp(2.1rem, 3.8vw, 3.15rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
}

.highlight-gold {
  color: #FBBF24;
}

.hero-subtitle {
  color: #CBD5E1;
  font-size: 1.1rem;
  line-height: 1.7;
  margin-bottom: 28px;
  max-width: 780px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 28px;
}

.hero-container .hero-actions {
  justify-content: center;
}

/* Panel Técnico de Telemetría en el Hero */
.telemetry-panel {
  background: rgba(15, 23, 42, 0.88);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-xl);
}

.telemetry-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 14px;
  margin-bottom: 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: #94A3B8;
}

.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #10B981;
  margin-right: 6px;
  box-shadow: 0 0 8px #10B981;
}

.telemetry-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
  font-size: 0.86rem;
}

.telemetry-row:last-child {
  margin-bottom: 0;
}

.telemetry-label {
  color: #E2E8F0;
  font-weight: 600;
}

.telemetry-val {
  font-family: var(--font-mono);
  color: #FBBF24;
  font-weight: 700;
}

/* ==========================================================================
   FRANJA DE DATOS Y AUTORIDAD HISTÓRICA
   ========================================================================== */
.metrics-band {
  background: #ffffff;
  border-bottom: 1px solid var(--color-border);
  padding: 32px 0;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.metric-item {
  text-align: center;
  padding: 12px;
  border-right: 1px solid var(--color-border);
}

.metric-item:last-child {
  border-right: none;
}

.metric-number {
  font-size: 2.1rem;
  font-weight: 800;
  color: var(--color-leon-purple);
  font-family: var(--font-heading);
  line-height: 1.1;
  margin-bottom: 6px;
}

.metric-label {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  font-weight: 600;
}

/* ==========================================================================
   SECCIONES Y TARJETAS TÉCNICAS
   ========================================================================== */
.section {
  padding: 76px 0;
}

.section-alt {
  background-color: #ffffff;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.section-dark {
  background-color: var(--color-primary-dark);
  color: #ffffff;
}

.section-header {
  max-width: 820px;
  margin: 0 auto 48px auto;
}

.text-center {
  text-align: center;
}

.section-tag {
  display: inline-block;
  font-size: 0.76rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 5px 14px;
  border-radius: 999px;
  margin-bottom: 12px;
}

.section-tag-purple {
  background-color: var(--color-leon-purple-light);
  color: var(--color-leon-purple);
  border: 1px solid rgba(125, 16, 56, 0.2);
}

.section-tag-gold {
  background-color: rgba(251, 191, 36, 0.16);
  color: #FBBF24;
  border: 1px solid rgba(251, 191, 36, 0.35);
}

.section-title {
  font-size: clamp(1.75rem, 3vw, 2.4rem);
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.06rem;
  color: var(--color-text-muted);
}

/* Grid de Servicios / Características */
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.feature-card, .service-box {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.feature-card:hover, .service-box:hover {
  box-shadow: var(--shadow-md);
  border-color: #CBD5E1;
}

.feature-title {
  font-size: 1.3rem;
  margin-bottom: 12px;
  color: var(--color-primary-dark);
}

.feature-text {
  font-size: 0.96rem;
  margin-bottom: 16px;
}

.feature-list {
  list-style: none;
  margin-top: 14px;
}

.feature-list li {
  position: relative;
  padding-left: 22px;
  margin-bottom: 8px;
  font-size: 0.92rem;
  color: var(--color-text-main);
  font-weight: 500;
}

.feature-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--color-leon-purple);
  font-weight: 800;
}

/* ==========================================================================
   TABLAS DE DATOS Y OBJETIVOS SMART (PARA AUDITORÍA Y HOJA DE RUTA)
   ========================================================================== */
.data-table-wrap {
  width: 100%;
  overflow-x: auto;
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.92rem;
}

.data-table th {
  background-color: #0F172A;
  color: #ffffff;
  font-weight: 700;
  padding: 14px 18px;
  white-space: nowrap;
}

.data-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-main);
  vertical-align: top;
}

.data-table tr:last-child td {
  border-bottom: none;
}

.data-table tr:nth-child(even) {
  background-color: #F8FAFC;
}

.badge-kw {
  display: inline-block;
  padding: 3px 9px;
  background: var(--color-leon-purple-light);
  color: var(--color-leon-purple);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  margin: 2px;
}

.badge-ok {
  display: inline-block;
  padding: 3px 9px;
  background: #ECFDF5;
  color: #047857;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 700;
}

/* ==========================================================================
   BLOQUE TERRITORIAL DEL PAÍS LEONÉS (LEÓN, ZAMORA Y SALAMANCA)
   ========================================================================== */
.pais-leones-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 36px;
  align-items: center;
}

.province-card {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-left: 5px solid var(--color-leon-purple);
  border-radius: var(--radius-md);
  padding: 22px;
  margin-bottom: 16px;
}

.province-card h3 {
  font-size: 1.18rem;
  color: var(--color-leon-purple);
  margin-bottom: 8px;
}

/* ==========================================================================
   FORMULARIOS Y CONTACTO
   ========================================================================== */
.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 44px;
  align-items: start;
}

.contact-form-card {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-lg);
  color: var(--color-text-main);
}

.form-group {
  margin-bottom: 18px;
}

.form-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  padding: 12px 14px;
  font-size: 0.95rem;
  font-family: var(--font-sans);
  border: 1px solid #CBD5E1;
  border-radius: var(--radius-sm);
  background-color: #F8FAFC;
  color: var(--color-text-main);
  transition: border-color var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-leon-purple);
  background-color: #ffffff;
}

/* ==========================================================================
   ACORDEÓN DE PREGUNTAS FRECUENTES
   ========================================================================== */
.accordion {
  max-width: 880px;
  margin: 0 auto;
}

.accordion-item {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
}

.accordion-header {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  background: none;
  border: none;
  text-align: left;
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  cursor: pointer;
}

.accordion-icon {
  font-size: 1.3rem;
  color: var(--color-leon-purple);
  font-weight: 800;
  margin-left: 16px;
}

.accordion-body {
  display: none;
  padding: 0 24px 20px 24px;
  color: var(--color-text-muted);
  font-size: 0.96rem;
  border-top: 1px solid #F1F5F9;
  padding-top: 16px;
}

.accordion-item.active .accordion-body {
  display: block;
}

/* ==========================================================================
   PIE DE PÁGINA (FOOTER)
   ========================================================================== */
.site-footer {
  background-color: #070C18;
  color: #CBD5E1;
  padding: 64px 0 0 0;
  border-top: 4px solid var(--color-leon-purple);
}

.footer-container {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.1fr;
  gap: 36px;
  padding-bottom: 48px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.footer-logo .brand-name {
  color: #ffffff;
}

.footer-desc {
  color: #94A3B8;
  font-size: 0.92rem;
  margin-bottom: 14px;
}

.footer-location {
  color: #FDE68A;
  font-size: 0.88rem;
  font-weight: 600;
}

.footer-heading {
  color: #ffffff;
  font-size: 1rem;
  margin-bottom: 16px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: #94A3B8;
  text-decoration: none;
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: #FBBF24;
}

.footer-contact-text {
  color: #94A3B8;
  font-size: 0.9rem;
  margin-bottom: 16px;
}

.footer-bottom {
  background-color: #040710;
  padding: 20px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.85rem;
  color: #64748B;
}

.bottom-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

/* ==========================================================================
   RESPONSIVE DESIGN (TABLET Y MÓVIL)
   ========================================================================== */
@media (max-width: 992px) {
  .site-header {
    height: 70px;
  }
  .header-container {
    height: 70px;
  }
  .main-nav {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    width: 100%;
    background-color: #ffffff;
    border-bottom: 3px solid var(--color-leon-purple);
    padding: 20px 24px;
    box-shadow: var(--shadow-xl);
    z-index: 999;
  }
  .main-nav.nav-open {
    display: block;
  }
  .main-nav .nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  .header-action {
    display: none;
  }
  .mobile-toggle {
    display: flex;
  }
  .hero-grid,
  .pais-leones-grid,
  .contact-wrapper,
  .features-grid,
  .grid-3 {
    grid-template-columns: 1fr;
  }
  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .metric-item {
    border-right: none;
    border-bottom: 1px solid var(--color-border);
  }
  .footer-container {
    grid-template-columns: 1fr;
  }
}

/* Franja de cifras: evita desbordamiento horizontal en móvil */
@media (max-width: 992px) {
  .metrics-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .metric-item { min-width: 0; }
  .metric-number { font-size: 1.5rem; overflow-wrap: anywhere; }
}
@media (max-width: 480px) {
  .metrics-grid { grid-template-columns: minmax(0, 1fr); }
}