* {
  list-style: none;
  text-decoration: none;
  margin: 0;
  box-sizing: border-box; 
  font-family: 'Poppins', sans-serif
}

/* Header */

header {
  height: 100px;
  background-color: #2b3d5b;
  text-align: left;
  padding: 40px;
  color: #c3c3c3;
}

/* Nav */

nav {
  float: left;
  width: 15%;
  height: 900px;
  background-color: #15253f;
}

nav ul {
  text-align: center;
  text-decoration: none;
  list-style-type: none;
  padding: 10px;
  margin-left: 50%;
  transform: translateX(-50%);
  width: 145px;
}

nav ul li.menu a {
  display: block;
  padding: 8px;
  text-decoration: none;
  text-align: center;
  background-color:#c3c3c3;
  color: black;
}

/* Article */

article {
  background-color: #7c8594;
  float: left;
  width: 85%;
  height: 900px;
}

article h2 {
  text-align: center;
  background-color:#c3c3c3;
  width: auto;
  padding: 13px;
}

article b.description {
  text-align: left;
  padding: 15px;
  color:black;
  margin-left: 15px;
  font-size: 16px;
}

article p.net {
  padding: 15px; 
  display: block;
  margin-left: 15px;
  text-align: left;
  width: 98.5%;  
}  

article table {
  margin-left: 30px;
  width: 1250px;
}

article table td.tabletitle{
  text-align: center;
}

article table td.image {
  text-align: center;
  padding: 35px;
}

@media (max-width:600px) { /* used to apply different styles for different media types */
  nav, article {
    width: 100%;
    height: auto;
  }
}

/* Footer */

footer {
  background-color: #2b3d5b;
  text-align: center;
  padding: 15px;
}

footer a.footer {
  text-align: center;
  color: #c3c3c3;
}

footer a img.imagenfooter {
  margin-top: 20px;
}