:root {
    --navy: #0F2340;
    --navy-deep: #081428;
    --navy-light: #1A3459;
    --turf: #2E8B4E;
    --turf-hover: #23703E;
    --turf-light: #44AF69;
    --turf-glow: rgba(46, 139, 78, 0.35);
    --steel: #7C8797;
    --steel-light: #E2E8F0;
    --paper: #F6F8F5;
    --white: #FFFFFF;
    --ink: #0F172A;
    --gold: #F59E0B;
    --radius: 8px;
    --shadow-sm: 0 2px 8px rgba(15, 35, 64, 0.08);
    --shadow-md: 0 12px 28px -6px rgba(15, 35, 64, 0.16);
    --shadow-lg: 0 20px 40px -10px rgba(15, 35, 64, 0.28);
  }

  * { 
    margin: 0; 
    padding: 0; 
    box-sizing: border-box; 
    -webkit-tap-highlight-color: transparent;
  }
  
  html { 
    scroll-behavior: smooth;
    scroll-padding-top: 96px;
    text-size-adjust: 100%;
    -webkit-text-size-adjust: 100%;
  }

  body {
    background: var(--paper);
    color: var(--ink);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
    width: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  }

  h1, h2, h3, .display {
    font-family: 'Big Shoulders Display', sans-serif;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 0.02em;
    line-height: 1.0;
  }

  .mono {
    font-family: 'IBM Plex Mono', monospace;
    letter-spacing: 0.02em;
  }

  a { color: inherit; text-decoration: none; }
  img { display: block; max-width: 100%; height: auto; border: none; }
  .wrap { max-width: 1200px; margin: 0 auto; padding: 0 20px; width: 100%; }

  /* Ribbon Badges */
  .ribbon {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--navy);
    color: var(--white);
    padding: 6px 16px;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.05em;
    border-radius: 4px;
  }
  .ribbon.turf { background: var(--turf); }
  .ribbon.gold { background: var(--gold); color: var(--navy-deep); }
  .ribbon.ghost { background: rgba(255, 255, 255, 0.15); color: var(--white); }

  /* Header & Navigation */
  header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: #081428;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  }

  nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    min-height: 72px;
  }

  .brand {
    display: flex;
    align-items: center;
    gap: 16px;
    text-decoration: none;
    flex-shrink: 0;
  }
  .brand-logo-plate {
    background: var(--white);
    border-radius: 10px;
    padding: 6px 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: 0 2px 6px rgba(0,0,0,0.25);
  }
  
  .brand-logo {
    height: 65px;
    width: auto;
    max-width: 220px;
    object-fit: contain;
    border-radius: 4px;
    display: block;
  }

  .brand-text-wrap {
    display: flex;
    flex-direction: column;
    gap: 6px;
  }
  .brand-name {
    font-family: 'Big Shoulders Display', sans-serif;
    font-weight: 900;
    font-size: 2.0rem;
    color: var(--white);
    letter-spacing: 0.04em;
    line-height: 0.9;
  }
  .brand-name span { color: var(--turf-light); }
  .brand-sub {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 10px;
    color: var(--steel-light);
    letter-spacing: 0.1em;
    opacity: 0.85;
  }

  .social-links {
    display: flex;
    align-items: center;
    gap: 10px;
  }
  .social-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.12);
    color: var(--white);
    transition: background 0.2s ease;
    border: 1px solid rgba(255, 255, 255, 0.2);
  }
  .social-icon:hover {
    background: var(--turf-light);
    color: var(--navy-deep);
  }
  .social-icon svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
  }

  .nav-menu {
    display: flex;
    gap: 24px;
    align-items: center;
    list-style: none;
  }
  .nav-menu a {
    color: var(--steel-light);
    font-size: 14px;
    font-weight: 500;
    padding: 6px 0;
  }
  .nav-menu a:hover { color: var(--white); }

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: var(--turf);
    color: var(--white);
    padding: 12px 22px;
    border-radius: var(--radius);
    font-weight: 700;
    font-size: 14px;
    border: none;
    cursor: pointer;
    text-align: center;
    box-shadow: 0 4px 12px var(--turf-glow);
  }
  .btn:hover {
    background: var(--turf-hover);
  }
  .btn.outline {
    background: transparent;
    border: 1.5px solid rgba(255, 255, 255, 0.3);
    box-shadow: none;
  }
  .btn.btn-lg {
    padding: 15px 30px;
    font-size: 16px;
  }

  .nav-toggle {
    display: none;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--white);
    font-size: 22px;
    cursor: pointer;
    padding: 8px 14px;
    border-radius: 6px;
  }

  /* Hero Section */
  .hero {
    position: relative;
    background: linear-gradient(165deg, #081428 0%, #0F2340 60%, #1A3459 100%);
    color: var(--white);
    padding: 60px 0 50px;
  }
  .hero-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 40px;
    align-items: center;
  }
  .hero-content h1 {
    font-size: clamp(1.8rem, 3.75vw, 3.15rem);
    margin: 16px 0 16px;
    line-height: 0.98;
  }
  .hero-content h1 span { color: var(--turf-light); }
  .hero-content p {
    color: var(--steel-light);
    font-size: 1.05rem;
    max-width: 520px;
    margin-bottom: 28px;
  }
  .hero-ctas {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    align-items: center;
  }

  /* Stat Counter Strip */
  .hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-top: 36px;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.12);
  }
  .stat-card {
    display: flex;
    flex-direction: column;
  }
  .stat-num {
    font-family: 'Big Shoulders Display', sans-serif;
    font-size: 2.0rem;
    font-weight: 900;
    color: var(--turf-light);
    line-height: 1;
  }
  .stat-label {
    font-size: 12px;
    color: var(--steel-light);
    margin-top: 2px;
  }

  .hero-media {
    position: relative;
  }
  .hero-card-preview {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--radius);
    padding: 16px;
    box-shadow: var(--shadow-lg);
  }
  .hero-image-placeholder {
    position: relative;
    width: 100%;
    height: 320px;
    background: #081428;
    border-radius: calc(var(--radius) - 2px);
    overflow: hidden;
  }
  .hero-hero-img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    border-radius: calc(var(--radius) - 2px);
    display: block;
  }

  /* Catalog & Products Section */
  section.block {
    padding: 64px 0;
  }
  .section-head {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 32px;
    gap: 16px;
    flex-wrap: wrap;
  }
  .section-head h2 {
    font-size: clamp(2.0rem, 3.8vw, 3.0rem);
    color: var(--navy);
  }
  .section-head p {
    color: #64748B;
    max-width: 460px;
    font-size: 14.5px;
  }

  /* Filter Tabs */
  .filter-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 28px;
    flex-wrap: wrap;
  }
  .tab-btn {
    padding: 8px 16px;
    border-radius: 20px;
    background: var(--white);
    border: 1px solid #CBD5E1;
    font-size: 13.5px;
    font-weight: 600;
    color: #475569;
    cursor: pointer;
  }
  .tab-btn.active {
    background: var(--navy);
    color: var(--white);
    border-color: var(--navy);
  }

  .catalog-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }
  .product-card {
    background: var(--white);
    border-radius: var(--radius);
    border: 1px solid #E2E8F0;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-sm);
  }
  .product-thumb {
    position: relative;
    aspect-ratio: 4/3;
    background: #081428;
    overflow: hidden;
  }
  .product-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
  }
  .product-thumb .ribbon {
    position: absolute;
    top: 12px;
    left: 12px;
    z-index: 2;
  }

  .product-body {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    flex: 1;
  }
  .product-body h3 {
    font-size: 1.4rem;
    color: var(--navy);
  }
  .product-desc {
    font-size: 13.5px;
    color: #475569;
    line-height: 1.5;
  }
  .specs-table {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px 10px;
    font-size: 12.5px;
    padding-top: 12px;
    border-top: 1px dashed #CBD5E1;
  }
  .specs-item span { color: #64748B; }
  .specs-item strong { color: var(--ink); font-weight: 600; display: block; }
  .product-body .btn {
    margin-top: auto;
    width: 100%;
  }

  /* Cotizador Express (Interactive WhatsApp Quote Builder) */
  .calculator-section {
    background: linear-gradient(135deg, #0F2340 0%, #081428 100%);
    color: var(--white);
    border-radius: var(--radius);
    padding: 36px 24px;
    margin: 40px 0;
    box-shadow: var(--shadow-lg);
  }
  .calc-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 28px;
  }
  .calc-header h2 {
    font-size: 2.2rem;
    color: var(--white);
    margin-bottom: 8px;
  }
  .calc-header p {
    color: var(--steel-light);
    font-size: 14px;
  }

  .calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    align-items: center;
  }
  .calc-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
  }
  .form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
  }
  .form-group label {
    font-size: 13.5px;
    font-weight: 600;
    color: var(--steel-light);
  }
  .form-control {
    padding: 12px 16px;
    border-radius: var(--radius);
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    font-size: 14.5px;
    outline: none;
    width: 100%;
  }
  .form-control option {
    background: var(--navy-deep);
    color: var(--white);
  }

  .calc-preview {
    background: rgba(255, 255, 255, 0.06);
    border: 1px dashed rgba(255, 255, 255, 0.2);
    border-radius: var(--radius);
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
  }
  .calc-summary-title {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 12px;
    color: var(--turf-light);
    text-transform: uppercase;
    letter-spacing: 0.08em;
  }
  .calc-summary-detail {
    font-size: 15px;
    color: var(--white);
    min-height: 70px;
    line-height: 1.5;
  }

  /* Why Us (Por Qué ArkyRedes) */
  .why-us {
    background: var(--white);
  }
  .why-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }
  .why-card {
    padding: 24px;
    border-radius: var(--radius);
    background: var(--paper);
    border: 1px solid #E2E8F0;
  }
  .why-num {
    font-family: 'Big Shoulders Display', sans-serif;
    font-size: 2.6rem;
    font-weight: 900;
    color: var(--turf);
    line-height: 1;
    margin-bottom: 8px;
  }
  .why-card h3 {
    font-size: 1.3rem;
    color: var(--navy);
    margin-bottom: 8px;
  }
  .why-card p {
    font-size: 13.5px;
    color: #475569;
  }

  /* Accordion FAQ */
  .faq-section {
    background: var(--paper);
  }
  .accordion {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
  }
  .faq-item {
    background: var(--white);
    border: 1px solid #E2E8F0;
    border-radius: var(--radius);
    overflow: hidden;
  }
  .faq-question {
    padding: 16px 20px;
    font-weight: 700;
    font-size: 15px;
    color: var(--navy);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  .faq-answer {
    padding: 0 20px 16px;
    font-size: 14px;
    color: #475569;
    display: none;
    line-height: 1.5;
  }
  .faq-item.active .faq-answer { display: block; }
  .faq-item.active .faq-icon { transform: rotate(180deg); }
  .faq-icon { transition: transform 0.2s ease; }

  /* Contact CTA Banner */
  .contact-banner {
    background: linear-gradient(135deg, var(--turf) 0%, var(--turf-hover) 100%);
    color: var(--white);
    padding: 56px 0;
    text-align: center;
  }
  /* Que cada sección (menos el catálogo, que es extenso) ocupe una pantalla completa */
  .hero,
  #cotizador,
  #por-que-nosotros,
  #faq {
    min-height: calc(100vh - 96px);
    display: flex;
    flex-direction: column;
    justify-content: center;
  }
  #contacto {
    min-height: calc(100vh - 96px - 112px);
    display: flex;
    flex-direction: column;
    justify-content: center;
  }
  @media (max-width: 768px) {
    .hero,
    #cotizador,
    #por-que-nosotros,
    #faq {
      min-height: calc(100vh - 80px);
    }
    #contacto {
      min-height: calc(100vh - 80px - 196px);
    }
  }
  .contact-banner h2 {
    font-size: clamp(2.0rem, 3.8vw, 3.0rem);
    margin-bottom: 12px;
  }
  .contact-banner p {
    font-size: 1.05rem;
    max-width: 560px;
    margin: 0 auto 24px;
    color: #E2F4E9;
  }
  .contact-ctas {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
  }
  .contact-ctas .btn {
    flex: 1 1 320px;
    max-width: 380px;
    flex-direction: column;
    line-height: 1.4;
    text-align: center;
    justify-content: center;
    background: #3A3F47;
    color: var(--white);
    border: none;
  }
  .contact-ctas .btn:hover {
    background: var(--turf-light);
    color: var(--navy-deep);
  }

  /* Footer */
  footer {
    background: var(--navy-deep);
    color: var(--steel-light);
    padding: 32px 0;
    font-size: 13.5px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
  }
  .foot-flex {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: 16px;
  }
  .foot-flex .brand { justify-self: start; }
  .foot-flex .social-links { justify-self: center; }
  .foot-flex .foot-copyright { justify-self: end; text-align: right; }

  /* Adaptación Responsiva para Celulares y Tablets */
  @media (max-width: 992px) {
    .hero-grid { grid-template-columns: 1fr; gap: 32px; }
    .catalog-grid { grid-template-columns: repeat(2, 1fr); }
    .why-grid { grid-template-columns: 1fr; }
    .calc-grid { grid-template-columns: 1fr; }
  }

  @media (max-width: 768px) {
    html { scroll-padding-top: 80px; }
    nav { min-height: 60px; padding: 10px 16px; }
    .brand-logo { height: 48px; max-width: 140px; }
    .brand-name { font-size: 1.5rem; }
    .brand-sub { font-size: 8.5px; }

    .nav-menu {
      display: none;
      position: absolute;
      top: 100%;
      left: 0;
      right: 0;
      background: #081428;
      flex-direction: column;
      padding: 20px;
      gap: 16px;
      border-bottom: 2px solid var(--turf);
      box-shadow: 0 10px 20px rgba(0,0,0,0.5);
    }
    .nav-menu.active { display: flex; }
    .nav-toggle { display: block; }

    .social-links { margin-top: 8px; justify-content: center; }

    .catalog-grid { grid-template-columns: 1fr; }
    .hero-stats { grid-template-columns: repeat(3, 1fr); text-align: center; }

    .calculator-section { padding: 24px 16px; }

    .foot-flex {
      grid-template-columns: 1fr;
      justify-items: center;
      text-align: center;
      gap: 14px;
    }
    .foot-flex .brand,
    .foot-flex .social-links,
    .foot-flex .foot-copyright {
      justify-self: center;
      text-align: center;
    }
  }

  /* Catalogo interactivo de Redes para Arco */
  .redes-cat-card {
    padding: 0;
    border: none;
    border-radius: 14px;
    background:
      linear-gradient(var(--white), var(--white)) padding-box,
      linear-gradient(135deg, var(--navy) 0%, var(--turf) 100%) border-box;
    border: 2px solid transparent;
    box-shadow: var(--shadow-md);
    overflow: hidden;
  }
  .redes-cat-header {
    padding: 26px 26px 20px;
    background: linear-gradient(120deg, var(--navy) 0%, var(--navy-light) 100%);
    position: relative;
  }
  .redes-cat-header::after {
    content: "";
    position: absolute;
    left: 0; right: 0; bottom: -2px;
    height: 3px;
    background: linear-gradient(90deg, var(--turf) 0%, var(--gold) 100%);
  }
  .redes-cat-header h3 {
    font-size: clamp(1.5rem, 2.6vw, 1.9rem);
    color: var(--white);
    margin: 12px 0 8px;
  }
  .redes-cat-header .product-desc { max-width: 640px; color: rgba(255,255,255,0.78); }
  .redes-cat-filtros { display: flex; gap: 10px; flex-wrap: wrap; padding: 20px 26px 6px; }
  .redes-input {
    flex: 1 1 180px;
    padding: 10px 14px;
    border-radius: var(--radius);
    border: 1.5px solid #DCE7DF;
    font-size: 13.5px;
    font-family: 'Inter', sans-serif;
    color: var(--ink);
    background: var(--paper);
    transition: border-color .15s ease, box-shadow .15s ease;
  }
  .redes-input:focus {
    outline: none;
    border-color: var(--turf);
    box-shadow: 0 0 0 3px var(--turf-glow);
    background: var(--white);
  }
  .redes-cat-tablewrap { padding: 18px 26px 26px; overflow-x: auto; }
  .redes-cat-table { width: 100%; border-collapse: separate; border-spacing: 0; min-width: 560px; }
  .redes-cat-table th {
    text-align: left;
    padding: 11px 12px;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: .05em;
    color: var(--navy);
    background: var(--paper);
    border-bottom: 2px solid var(--turf);
    white-space: nowrap;
  }
  .redes-cat-table th:first-child { border-top-left-radius: 8px; }
  .redes-cat-table th:last-child { border-top-right-radius: 8px; }
  .redes-cat-table td {
    padding: 14px 12px;
    border-bottom: 1px solid #E7EEE9;
    font-size: 13.5px;
    color: var(--ink);
    vertical-align: middle;
  }
  .redes-cat-table tbody tr { transition: background .15s ease; }
  .redes-cat-table tbody tr:hover { background: rgba(46, 139, 78, 0.06); }
  .redes-cat-table tbody tr:last-child td { border-bottom: none; }
  .rc-medida { font-weight: 700; color: var(--navy); white-space: nowrap; }
  .rc-btn {
    padding: 8px 18px;
    font-size: 12.5px;
    font-weight: 700;
    white-space: nowrap;
    width: auto;
    margin-top: 0;
    background: var(--turf);
    border-radius: 999px;
    box-shadow: 0 2px 6px rgba(46, 139, 78, 0.35);
  }
  .rc-btn:hover { background: var(--turf-hover); transform: translateY(-1px); }
  .redes-cat-sin { display: none; text-align: center; padding: 20px; color: #64748B; font-size: 13.5px; }

  @media (max-width: 480px) {
    .redes-cat-filtros { flex-direction: column; }
  }