  <style>
    /* ================================================= */
    /* ============== APPLE DESIGN SYSTEM ============== */
    /* ================================================= */
    
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    
    :root {
      --apple-bg: #ffffff;
      --apple-text: #1d1d1f;
      --apple-muted: #6e6e73;
      --apple-border: rgba(0,0,0,0.06);
      --apple-blue: #0066cc;
      --apple-green: #34c759;
      --apple-gray-soft: #f5f5f7;
      --apple-gray-medium: #e8e8ed;
      --apple-radius-xl: 32px;
      --apple-radius-lg: 24px;
      --apple-radius-md: 18px;
      --transition-apple: all 0.5s cubic-bezier(0.22, 0.61, 0.36, 1);
      --shadow-sm: 0 4px 12px rgba(0,0,0,0.02);
      --shadow-md: 0 8px 24px rgba(0,0,0,0.04);
      --shadow-lg: 0 24px 48px rgba(0,0,0,0.06);
    }
    
    body {
      background: var(--apple-bg);
      color: var(--apple-text);
      font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Helvetica Neue', sans-serif;
      line-height: 1.5;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
    }
    
    /* ================================================= */
    /* ============== FONDO INTERACTIVO ================ */
    /* ================================================= */
    
    .background-interactive {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-image: url('/assets/img/fondo-matriz.jpg');
      background-size: cover;
      background-position: center;
      background-repeat: no-repeat;
      transition: opacity 0.8s cubic-bezier(0.22, 0.61, 0.36, 1);
      opacity: 0.5;
      z-index: -2;
    }
    
    .background-overlay {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: white;
      transition: opacity 0.8s cubic-bezier(0.22, 0.61, 0.36, 1);
      opacity: 0.3;
      z-index: -1;
    }
    
    body:hover .background-interactive {
      opacity: 0.3;
    }
    
    body:hover .background-overlay {
      opacity: 0.7;
    }

    
    /* ================================================= */
    /* ============== SELECTOR DE EMPRESAS ============= */
    /* ================================================= */
    
    .selector-wrapper {
      flex: 1;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 40px 24px;
      min-height: calc(100vh - 140px);
    }
    
    .selector-container {
      max-width: 1100px;
      width: 100%;
      margin: 0 auto;
      text-align: center;
    }
    
    .matriz-logo {
      margin-bottom: 40px;
    }
    
    .matriz-logo img {
      height: 60px;
      width: auto;
      opacity: 0.9;
      transition: var(--transition-apple);
    }
    
    .matriz-logo img:hover {
      opacity: 1;
      transform: scale(1.02);
    }
    
    .selector-badge {
      display: inline-block;
      padding: 8px 20px;
      background: rgba(255,255,255,0.8);
      backdrop-filter: blur(8px);
      border: 1px solid rgba(255,255,255,0.3);
      color: var(--apple-text);
      border-radius: 100px;
      font-size: 13px;
      font-weight: 600;
      letter-spacing: 1px;
      margin-bottom: 24px;
      box-shadow: var(--shadow-sm);
    }
    
    .selector-title {
      font-size: 40px;
      font-weight: 600;
      letter-spacing: -1px;
      margin-bottom: 16px;
      color: var(--apple-text);
      text-shadow: 0 2px 4px rgba(255,255,255,0.5);
    }
    
    .selector-subtitle {
      font-size: 18px;
      color: var(--apple-muted);
      max-width: 600px;
      margin: 0 auto 48px;
      line-height: 1.6;
      text-shadow: 0 1px 2px rgba(255,255,255,0.5);
    }
    
    .empresas-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
      margin-top: 20px;
    }
    
    .empresa-card {
      background: rgba(255,255,255,0.85);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border: 1px solid rgba(255,255,255,0.5);
      border-radius: var(--apple-radius-xl);
      padding: 40px 32px;
      text-decoration: none;
      color: inherit;
      transition: var(--transition-apple);
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      box-shadow: var(--shadow-md);
    }
    
    .empresa-card:hover {
      transform: translateY(-6px);
      border-color: var(--apple-blue);
      background: rgba(255,255,255,0.95);
      box-shadow: var(--shadow-lg);
    }
    
    .empresa-logo {
      height: 80px;
      margin-bottom: 24px;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    
    .empresa-logo img {
      height: 80px;
      width: auto;
      max-width: 240px;
      object-fit: contain;
      transition: var(--transition-apple);
    }
    
    .empresa-card:hover .empresa-logo img {
      transform: scale(1.02);
    }
    
    .empresa-card h2 {
      font-size: 28px;
      font-weight: 600;
      letter-spacing: -0.5px;
      margin-bottom: 12px;
    }
    
    .empresa-descripcion {
      font-size: 15px;
      color: var(--apple-muted);
      margin-bottom: 24px;
      line-height: 1.6;
      max-width: 280px;
    }
    
    .empresa-link {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: var(--apple-blue);
      font-weight: 500;
      font-size: 15px;
      margin-top: 8px;
      padding: 8px 20px;
      background: rgba(0,102,204,0.08);
      border-radius: 100px;
      transition: var(--transition-apple);
    }
    
    .empresa-card:hover .empresa-link {
      background: var(--apple-blue);
      color: white;
    }
    
    .empresa-link i {
      transition: transform 0.2s ease;
    }
    
    .empresa-card:hover .empresa-link i {
      transform: translateX(4px);
    }
    
    /* ================================================= */
    /* ============== FOOTER SIMPLIFICADO ============== */
    /* ================================================= */
    
    .footer-simple {
      background: rgba(255,255,255,0.85);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-top: 1px solid var(--apple-border);
      padding: 20px 24px;
      text-align: center;
      color: var(--apple-muted);
      font-size: 13px;
      margin-top: auto;
    }
    
    .footer-simple a {
      color: var(--apple-text);
      text-decoration: none;
      transition: color 0.2s ease;
    }
    
    .footer-simple a:hover {
      color: var(--apple-blue);
    }
    
    .footer-simple i {
      margin: 0 4px;
      color: var(--apple-blue);
    }
    
    /* ================================================= */
    /* ============== WHATSAPP FLOATING ================ */
    /* ================================================= */
    
    .whatsapp-float {
      position: fixed;
      bottom: 30px;
      right: 30px;
      background: #25D366;
      color: white;
      width: 56px;
      height: 56px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 28px;
      box-shadow: 0 8px 20px rgba(37,211,102,0.25);
      transition: var(--transition-apple);
      z-index: 999;
      text-decoration: none;
    }
    
    .whatsapp-float:hover {
      transform: scale(1.1);
      box-shadow: 0 12px 28px rgba(37,211,102,0.35);
    }
    
    /* ================================================= */
    /* ============== RESPONSIVE ======================= */
    /* ================================================= */
    
    @media (max-width: 850px) {
      .empresas-grid {
        grid-template-columns: 1fr;
        max-width: 450px;
        margin-left: auto;
        margin-right: auto;
      }
      
      .selector-title {
        font-size: 36px;
      }
      
      .mac-links {
        display: none;
      }
      
      .selector-wrapper {
        min-height: calc(100vh - 120px);
        padding: 30px 20px;
      }
    }
    
    @media (max-width: 480px) {
      .empresa-card {
        padding: 32px 24px;
      }
      
      .empresa-logo img {
        height: 60px;
      }
      
      .empresa-card h2 {
        font-size: 24px;
      }
      
      .selector-title {
        font-size: 32px;
      }
      
      .matriz-logo img {
        height: 48px;
      }
    }
    
    html {
      scroll-behavior: smooth;
    }
  </style>