:root {
    --blue: #0076d7; /* azul tipo folleto */
    --dark: #111827;
    --gray-bg: #F4F5F7;
    --gray-soft: #E5E7EB;
    --gray-text: #4B5563;
    --light: #FFFFFF;
    --border-radius-lg: 18px;
    --border-radius-md: 12px;
    --shadow-soft: 0 12px 30px rgba(0,0,0,0.08);
  }

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

  body {
    font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    color: #111827;
    background: #ffffff;
    line-height: 1.5;
  }

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

  a { color: inherit; text-decoration: none; }

  .page {
    max-width: 1080px;
    margin: 0 auto;
    padding: 32px 20px 60px;
  }

  .section-title {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 6px;
  }

  .section-lead {
    font-size: 0.95rem;
    color: var(--gray-text);
    max-width: 640px;
  }

  /* HEADER – ESPACIO PARA LOGO GENERAL */
  .header-logo {
    height: 64px;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
  }

  .header-logo-placeholder {
    width: 150px;
    height: 42px;      
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    color: #94A3B8;
  }

  /* HERO / BANNER PRINCIPAL */
  .hero {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.2fr);
    gap: 28px;
    align-items: center;
    margin-bottom: 24px;
  }

  .hero-left {
    display: flex;
    flex-direction: column;
    gap: 14px;
  }

  .hero-product-logo {
    height: 40px;
    display: flex;
    align-items: center;
    margin-bottom: 4px;
  }

  .hero-product-logo-placeholder {
    width: 160px;
    height: 32px;
    /* display: flex; */
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    color: #94A3B8;
  }

  .hero-badge-text {
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: #111827;
  }

  .hero-pill {
    display: inline-flex;
    align-items: center;
    padding: 6px 14px;
    border-radius: 999px;
    border: 1px solid #D1D5DB;
    background: #F9FAFB;
    font-size: 0.8rem;
    color: var(--gray-text);
    margin-top: 6px;
    width: max-content;
  }

  .hero-heading {
    margin-top: 10px;
    font-size: 2rem;
    font-weight: 800;
    line-height: 1.15;
    max-width: 480px;
  }

  .hero-heading .accent-blue {
    color: var(--blue);
  }

  .hero-visual {
    position: relative;
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--gray-soft);
    background: #FFFFFF;
    box-shadow: var(--shadow-soft);
    min-height: 260px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 18px;
  }

  .hero-notebook-placeholder {
    width: 100%;
    max-width: 520px;
    min-height: 220px;
    border-radius: 16px;
    background: #F9FAFB;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    font-size: 0.8rem;
    color: #94A3B8;
    padding: 16px;
  }

  /* Zona para íconos de Windows / Android */
  .hero-os-icons {
    position: absolute;
    top: 14px;
    right: 16px;
    display: flex;
    gap: 10px;
    font-size: 1.3rem;
    color: #111827;
  }

  /* LINK / BOTÓN PARA DESCARGAR PDF */
  .download-pdf {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 28px;
  }

  .download-pdf a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    border-radius: 999px;
    background: var(--blue);
    color: #ffffff;
    font-size: 0.85rem;
    font-weight: 500;
    box-shadow: 0 8px 18px rgba(37,99,235,0.35);
    transition: transform 0.18s ease, box-shadow 0.18s ease, background-color 0.18s ease;
  }

  .download-pdf a:hover {
    transform: translateY(-1px);
    box-shadow: 0 10px 24px rgba(37,99,235,0.45);
    background-color: #0063b5;
  }

  /* TARJETA DE VIDEO (discreta) */
  .video-card {
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--gray-soft);
    background: #F9FAFB;
    padding: 10px 12px;
    display: grid;
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    gap: 10px;
    align-items: center;
    font-size: 0.8rem;
    cursor: pointer;
    transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease, background-color 0.22s ease;
    margin-top: 14px;
  }

  .video-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 26px rgba(15,23,42,0.12);
    border-color: #C7D2FE;
    background-color: #FFFFFF;
  }

  .video-thumb {
    position: relative;
    border-radius: 10px;
    overflow: hidden;
    background: radial-gradient(circle at 0% 0%, #E5F0FF 0%, #CBD5F5 45%, #E5E7EB 100%);
    aspect-ratio: 16 / 9;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.25s ease, filter 0.25s ease;
    filter: grayscale(0.25);
  }

  .video-card:hover .video-thumb {
    transform: scale(1.01);
    filter: grayscale(0);
  }

  .video-thumb::before {
    content: "";
    position: absolute;
    width: 40px;
    height: 40px;
    border-radius: 999px;
    border: 2px solid rgba(15,23,42,0.2);
    background: rgba(255,255,255,0.94);
    box-shadow: 0 8px 18px rgba(15,23,42,0.18);
  }

  .video-thumb::after {
    content: "";
    position: absolute;
    margin-left: 2px;
    width: 0;
    height: 0;
    border-top: 8px solid transparent;
    border-bottom: 8px solid transparent;
    border-left: 12px solid #111827;
  }

  .video-inner { display: none; }
  .video-card.is-playing .video-thumb { display: none; }
  .video-card.is-playing .video-inner { display: block; }

  .video-inner video {
    width: 100%;
    border-radius: 10px;
    display: block;
  }

  .video-meta-title { font-weight: 600; margin-bottom: 2px; }

  .video-meta-text {
    color: var(--gray-text);
    font-size: 0.78rem;
    margin-bottom: 4px;
  }

  .video-meta-tag {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 999px;
    background: #E5F0FF;
    font-size: 0.7rem;
    color: #1D4ED8;
    font-weight: 500;
  }

  /* BANDA OSCURA RESUMEN */
  .band {
    background: #111827;
    border-radius: var(--border-radius-lg);
    padding: 20px 22px;
    color: #F9FAFB;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
    margin-bottom: 32px;
  }

  .band-item-title {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 4px;
  }

  .band-item-text {
    font-size: 0.85rem;
    color: #D1D5DB;
  }

  .band-icon {
    width: 26px;
    height: 26px;
    border-radius: 999px;
    border: 1px solid rgba(255,255,255,0.35);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    margin-bottom: 8px;
  }

  .band-icon i {
    line-height: 1;
  }

  /* DIAGRAMA OPERATIVO – BANDA AZUL CON RADIO */
  .diagram-wrapper {
    margin-bottom: 30px;
    border-radius: var(--border-radius-lg);
    background: var(--blue);
    color: #ffffff;
    padding: 22px 26px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
  }

  .diagram-title-block {
    max-width: 260px;
    font-weight: 700;
    font-size: 1.25rem;
    line-height: 1.2;
  }

  .diagram-flow {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 26px;
    font-size: 0.85rem;
  }

  .diagram-element {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    min-width: 90px;
  }

  .diagram-icon-box {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    border: 2px solid #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255,255,255,0.08);
    font-size: 1.6rem;
  }

  .diagram-icon-box i {
    line-height: 1;
  }

  .diagram-label { font-size: 0.8rem; }

  .diagram-arrows {
    font-size: 1.1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
  }

  /* ESTRUCTURA FUNCIONAL – TEXTO + ILUSTRACIÓN */
  .structure {
    margin-bottom: 32px;
  }

  .structure-layout {
    margin-top: 18px;
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: 32px;
    align-items: center;
  }

  .structure-text-columns {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
    font-size: 0.92rem;
  }

  .structure-text-columns h3 {
    font-size: 1.02rem;
    font-weight: 700;
    margin-bottom: 6px;
  }

  .structure-text-columns p {
    color: var(--gray-text);
  }

  .structure-illustration-wrapper {
    position: relative;
    min-height: 260px;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .structure-illustration-placeholder {
    width: 100%;
    max-width: 360px;
    min-height: 220px;
    border-radius: 22px;
    border: 1px dashed #CBD5E1;
    background: #F9FAFB;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    font-size: 0.8rem;
    color: #94A3B8;
    padding: 16px;
  }

  .structure-client-card {
    position: absolute;
    left: 0;
    bottom: -10px;
    background: var(--blue);
    color: #ffffff;
    border-radius: 12px;
    padding: 10px 14px;
    max-width: 270px;
    box-shadow: 0 14px 30px rgba(15,23,42,0.32);
    font-size: 0.8rem;
  }

  .structure-client-card-title {
    font-weight: 700;
    margin-bottom: 4px;
    font-size: 0.85rem;
  }

  /* FUNCIONALIDADES ESENCIALES – ESTILO IGUAL AL SCREENSHOT */
  .features-basic {
    margin-bottom: 30px;
  }

  .features-basic-inner {
    background: #F5F5F5;
    border-radius: 18px;
    padding: 20px 24px 22px;
    border: 1px solid #E5E7EB;
  }

  .features-basic-grid {
    margin-top: 14px;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 10px 28px;
    font-size: 0.88rem;
  }

  .feature-basic-item {
    background: transparent;
    border: none;
    padding: 0;
  }

  .feature-basic-title {
    font-weight: 700;
    margin-bottom: 4px;
    font-size: 0.9rem;
    color: var(--blue);
  }

  .feature-basic-text {
    color: var(--gray-text);
    margin-bottom: 10px;
  }

  .feature-basic-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: #E5E7EB;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
  }

  .feature-basic-icon i {
    line-height: 1;
  }

  /* FUNCIONES OPERATIVAS – ESTILO OSCURO 2x2 */
  .operations {
    margin-bottom: 32px;
  }

  .operations-inner {
    background: #050505;
    color: #F9FAFB;
    border-radius: 18px;
    padding: 24px 28px 24px;
  }

  .operations-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 18px;
  }

  .operations-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px 20px;
  }

  .operation-item {
    background: #18181b;
    border-radius: 12px;
    border: 1px solid #27272f;
    padding: 12px 14px;
    display: flex;
    align-items: center;
    gap: 12px;
  }

  .operation-icon {
    width: 40px;
    height: 40px;
    border-radius: 999px;
    background: #0b0b0d;
    border: 1px solid #3f3f46;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.95rem;
    flex-shrink: 0;
  }

  .operation-icon i {
    line-height: 1;
  }

  .operation-text-title {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 2px;
  }

  .operation-text-body {
    font-size: 0.82rem;
    color: #d4d4d8;
  }

  /* CARACTERÍSTICAS AVANZADAS */
  .advanced { margin-bottom: 28px; }

  .advanced-grid {
    margin-top: 16px;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
    font-size: 0.9rem;
  }

  .advanced-card {
    background: #F5F5F5;
    border-radius: 18px;
    padding: 18px 30px 18px 22px;
    border: 1px solid #E5E7EB;
  }

  .advanced-card-title {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 6px;
  }

  .advanced-list {
    list-style: none;
    padding: 0;
  }

  .advanced-list li {
    position: relative;
    padding-left: 16px;
    margin-bottom: 4px;
    color: var(--gray-text);
  }

  .advanced-list li::before {
    content: "•";
    position: absolute;
    left: 0;
    top: 0;
    color: var(--blue);
    font-weight: 700;
  }

  /* FOOTER LEGAL */
  .footer {
    font-size: 0.75rem;
    color: var(--gray-text);
    border-top: 1px solid var(--gray-soft);
    padding-top: 12px;
    margin-top: 24px;
    display: grid;
    grid-template-columns: minmax(0, 2.2fr) minmax(0, 1fr);
    gap: 12px;
    align-items: center;
  }

  .footer-right {
    text-align: right;
    font-size: 0.8rem;
  }

  .footer-mail { font-weight: 600; }

  /* FADE IN */
  .fade-in {
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.6s ease, transform 0.6s ease;
  }

  .fade-in.is-visible {
    opacity: 1;
    transform: translateY(0);
  }

  @media (max-width: 900px) {
    .hero { grid-template-columns: minmax(0, 1fr); }
    .band { grid-template-columns: minmax(0, 1fr); }
    .features-basic-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .advanced-grid { grid-template-columns: minmax(0, 1fr); }
    .footer { grid-template-columns: minmax(0, 1fr); text-align: left; }
    .footer-right { text-align: left; }
    .video-card { grid-template-columns: minmax(0, 1fr); }
    .diagram-wrapper {
      flex-direction: column;
      align-items: flex-start;
    }
    .diagram-flow {
      justify-content: flex-start;
      flex-wrap: wrap;
    }
    .structure-layout {
      grid-template-columns: minmax(0, 1fr);
    }
    .structure-illustration-wrapper {
      margin-top: 12px;
    }
    .operations-grid {
      grid-template-columns: minmax(0, 1fr);
    }
  }

  @media (max-width: 600px) {
    .page { padding: 20px 16px 40px; }
    .hero-heading { font-size: 1.6rem; }
    .band { padding: 16px 16px 18px; }
    .operations-inner { padding: 20px 18px; }
  }