body {
  font-family: Arial, sans-serif;
  margin: 0;
  background-color: #f5f8fb;
  color: #333;
  padding: 0 10px;
  margin: 0;
}
.contenido{
  margin: 0;
}
.encabezado {
  background-color: #e0eaf6;
  display: flex;
  justify-content: space-between;
  padding: 10px 20px;
  font-size: 0.9em;
  color: #666;
  flex-wrap: wrap;
}

.titulo-principal {
  text-align: center;
  font-size: 2.5em;
  margin: 20px 0 10px;
  color: #223e66;
}

.subtitulo {
  text-align: center;
  font-size: 1.2em;
  color: #6a92b5;
  margin-bottom: 20px;
}

.contenido-img {
  width: 100%;
  display: flex;
  justify-content: center;
  margin-bottom: 20px;
}

.img-main {
  width: auto;
  max-height: 300px; 
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
}


.columnas {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-around;
  padding: 20px;
  background-color: #fff;
  gap: 20px;
}

.columnas article {
  flex: 1 1 250px;
  max-width: 30%;
  min-width: 250px;
  background: #f0f4f9;
  padding: 15px;
  box-shadow: 0 0 5px rgba(0,0,0,0.1);
  border-left: 3px solid #4b79a1;
  box-sizing: border-box;
}

.columnas h3 {
  font-size: 1em;
  color: #205072;
  margin-bottom: 10px;
}

.columnas p {
  font-size: 0.9em;
  color: #444;
}

.bloque-azul {
  display: flex;
  flex-wrap: wrap;
  background-color: #2a4d80;
  color: white;
  padding: 20px;
  gap: 20px;
}

.imagen-secundaria {
  flex: 1 1 250px;
  min-width: 250px;
  object-fit: cover;
  border-radius: 5px;
  width: 100%;
  max-height: 200px;
}

.texto-azul {
  flex: 2 1 300px;
  min-width: 250px;
}

.texto-azul h2 {
  margin-top: 0;
}

.texto-azul p {
  font-size: 0.95em;
}

.pie {
  background-color: #dfe9f1;
  padding: 10px 20px;
  text-align: center;
  font-size: 0.85em;
}

.pie ul {
  list-style: none;
  padding: 0;
  margin: 10px 0 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 15px;
}

.pie a {
  color: #223e66;
  text-decoration: none;
}


@media (max-width: 768px) {
  .encabezado {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .titulo-principal {
    font-size: 2em;
  }

  .subtitulo {
    font-size: 1em;
  }
  .img-main{
    width: 100vw;
    max-width: 100%;
  }

  .columnas {
    flex-direction: column;
    align-items: center;
  }

  .columnas article {
    max-width: 90%;
  }

  .bloque-azul {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .imagen-secundaria {
    max-height: none;
  }
}