/* ... el resto del CSS igual ... */
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      font-family: 'Poppins', sans-serif;
    }
    body {
      background-color: #c2c2c2;
      color: #333;
      line-height: 1.6;
      padding-bottom: 60px;
    }
    header, section, footer {
      max-width: 900px;
      margin: 40px auto;
      background: #fff;
      padding: 30px 40px;
      border-radius: 12px;
      box-shadow: 0 6px 18px rgba(0, 0, 0, 0.08);
    }
    h1, h2, h3, h4 {
      color: #2c3e50;
      margin-bottom: 15px;
    }
    p {
      margin-bottom: 18px;
    }
    .logos img {
      max-width: 30%;
      margin: 0 10px;
    }
    .section-block {
      margin-top: 40px;
    }
    .services-grid, .features-grid {
      #display: flex; /*hace columnas, ahora esta comentado*/
      flex-wrap: wrap;
      gap: 20px;
    }
    .service, .feature {
      background: #f8f9fa;
      border-radius: 10px;
      padding: 20px;
      flex: 1 1 250px;
      box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    }
    footer {
      text-align: center;
      font-size: 0.9rem;
      color: #777;
    }
    .contact-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 20px;
    }
    .contact-grid img {
      max-width: 100px;
      display: block;
      margin: 10px auto;
    }
    a {
      color: #16a085;
      text-decoration: none;
    }
    a:hover {
      text-decoration: underline;
    }
    /* Botones estilo */
    .btn {
      display: inline-block;
      padding: 12px 24px;
      border-radius: 8px;
      font-weight: 700;
      font-size: 1rem;
      cursor: pointer;
      text-align: center;
      text-decoration: none;
      transition: background-color 0.3s ease, color 0.3s ease;
      user-select: none;
      border: none;
      margin: 5px 10px 5px 0;
    }
    .btn--primary {
      background-color: #16a085;
      color: white;
      box-shadow: 0 4px 12px rgba(22, 160, 133, 0.4);
    }
    .btn--primary:hover {
      background-color: #13856d;
      box-shadow: 0 6px 20px rgba(19, 133, 109, 0.6);
      color: white;
    }
    .btn--stroke {
      background-color: transparent;
      border: 2px solid #16a085;
      color: #16a085;
      box-shadow: none;
    }
    .btn--stroke:hover {
      background-color: #16a085;
      color: white;
      box-shadow: 0 6px 20px rgba(22, 160, 133, 0.6);
    }
    /* Para que el botón ocupe todo el ancho del contenedor feature */
    .btn-block {
      display: block;
      width: 100%;
      margin-top: 15px;
    }
    /* Ajustes en los contenedores para separar mejor los botones */
    .feature-content {
      display: flex;
      flex-direction: column;
    }
    /* Responsive (opcional, ya que usas flex-wrap) */
    @media (max-width: 600px) {
      .services-grid, .features-grid, .hiper-list {
        flex-direction: column;
      }
    }
    /* Menú superior */
    .main-nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: #16a085;
      color: white;
      box-shadow: 0 2px 5px rgba(0,0,0,0.1);
      z-index: 9999;
      font-family: 'Poppins', sans-serif;
    }
    .nav-container {
      max-width: 900px;
      margin: 0 auto;
      padding: 10px 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .logo {
      font-weight: 700;
      font-size: 1.5rem;
      color: white;
      text-decoration: none;
    }
    .nav-menu {
      list-style: none;
      display: flex;
      gap: 25px;
      margin: 0;
      flex-wrap: wrap; /* Permite que los botones bajen si hay poco espacio */
    }
    .nav-menu li a {
      color: white;
      text-decoration: none;
      font-weight: 600;
      padding: 6px 8px;
      transition: background-color 0.3s ease;
      border-radius: 6px;
      white-space: nowrap;
    }
    .nav-menu li a:hover,
    .nav-menu li a:focus {
      background-color: #13856d;
      outline: none;
    }
    /* Botón hamburguesa para móvil */
    .nav-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
      position: relative;
      width: 30px;
      height: 25px;
    }
    .hamburger,
    .hamburger::before,
    .hamburger::after {
      display: block;
      background-color: white;
      height: 3px;
      border-radius: 2px;
      position: absolute;
      width: 100%;
      transition: transform 0.3s ease, top 0.3s ease, bottom 0.3s ease;
    }
    .hamburger {
      top: 50%;
      transform: translateY(-50%);
    }
    .hamburger::before {
      content: "";
      top: -10px;
    }
    .hamburger::after {
      content: "";
      bottom: -10px;
    }
    /* Responsive - móvil */
    @media (max-width: 768px) {
      .nav-menu {
        position: fixed;
        top: 60px;
        right: 0;
        background: #16a085;
        height: calc(100% - 60px);
        width: 220px;
        flex-direction: column;
        padding-top: 20px;
        transform: translateX(100%);
        transition: transform 0.3s ease;
        box-shadow: -2px 0 5px rgba(0,0,0,0.2);
        border-radius: 0 0 0 12px;
        overflow-y: auto;
      }
      .nav-menu.show {
        transform: translateX(0);
      }
      .nav-menu li {
        margin: 10px 0;
      }
      .nav-toggle {
        display: block;
      }
      /* Ocultamos los botones secundarios en header en móvil */
      header .header-buttons {
        display: none;
      }
    }
    html {
      scroll-behavior: smooth;
    }
    /* Nuevo contenedor botones header */
    header .header-buttons {
      max-width: 900px;
      margin: 0 auto 0 auto;
      padding: 0 40px 10px 40px;
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: flex-start;
    }
.btn-volver-arriba {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background-color: #222;
  color: #fff;
  font-size: 24px;
  padding: 10px 14px;
  border-radius: 50%;
  text-decoration: none;
  z-index: 999;
  box-shadow: 0 4px 6px rgba(0,0,0,0.2);
  transition: opacity 0.3s ease;
  opacity: 0.6;
}

.btn-volver-arriba:hover {
  opacity: 1;
  background-color: #444;
}