.main_article {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: #fff;
}

article {
    max-width: 800px;
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 35px 20px;
}

h1, h2, h3 {
    margin: 15px 0;
    color: #3e4c5e;

}

.container_blog {
  margin: 0 auto;
}

.header_blog {
  text-align: center;
  color: #1f1f1f;
  padding: 20px;
  max-width: 1000px;
}

h1 {
  color: #406087;
  font-size: 36px;
  margin-bottom: 20px;
}

p {
  font-size: 18px;
  font-family: system-ui;
}
p > b {
  color: #3F51B5;
}

.nav_blog {
  background-color: #3e4c5e;
  display: flex;
  justify-content: center;
  width: 100%;
}

h2 > a {
  color: #3F51B5;
  font-weight: 600;
}

.nav_blog ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav_blog li {
  display: inline-block;
  margin: 15px 10px;
}

.nav_blog a {
  color: #fff;
  text-decoration: none;
  padding: 8px 16px;
  transition: background-color 0.1s, color 0.1s;
}

/* Estilo para el enlace activo */
.nav_blog a.activo {
  background-color: #FF9800;
}

/* Estilo para el hover */
.nav_blog a:hover {
  background-color: #1f1f1f;
  color: #fff;
}