body {
  font-family:Arial, sans-serif;
  margin:0 auto;
  /* padding:1em; */
  background-color:#f9f9f9;
  max-width:1024px;
}
h1  {
    font-size:1.4em;
    margin:3px;
}
h2 {
    text-align:center;
    font-size: 1.3em;
    margin:0;
}
h3 {
  padding-left: 4%;
}
p {
    line-height:1.3em;
    text-align:justify;
}
a {
  text-decoration: none;
  /* margin-bottom: 1em; */
}
header {
  background-color: #f7ffb1;
  color: #ff0000;
  padding:4px;
  border-top: 2px inset;
  max-width: 1024px;
  text-align:center;
}

nav {
  background-color: #ffefdb;
  border-bottom: 2px inset #aec105;
  border-top: 2px inset;
}
li {
  margin-bottom: 7px;
}
nav ul {
  list-style-type:none;
  margin:2px;
  padding:0;
  overflow:hidden;
  
}
ul  {
  list-style-type: none;
}
nav ul li {
  float:left;
  /* margin:0; */
  /* padding:0; */
}

nav ul li a {
  display:block;
  /* color:white; */
  text-align:center;
  margin:4px;
  border-radius:4px;
  padding:2px 10px;
  /* background-color:#0e8113; */
  text-decoration:none;
}

nav ul li a:hover {
  background-color:#f80606;
  color: yellow;
}
main {
  /* padding: 20px; */
  position: relative;
  /* top: 100px; */
}

pre {
  color: white;
  font-size: 1.1em;
  line-height: 1.6em;
  padding: 10px;
  /* font-weight: bold; */
  border: 1px inset;
  background-color: #0039ff;
  /* padding-left: 10%; */
}
table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 20px;
}
table, th, td {
  border: 1px solid black;
}
th, td {
  padding: 8px;
  text-align: left;
}
th {
  background-color: #f2f2f2;
}
footer {
    background-color: #ebebed;
    color: #696a6d;
    text-align:center;
    padding:5px;
    border-top: 1px inset;
}
section {
  border: 1px inset;
  background-color: #e3e3dc;
  padding: 10px;
  position: relative;
  border-radius: 4px;
  /* top: 100px; */
  margin: 1em 0;
}

.botonHome {
  border: 1px outset;
  background-color: yellow;
  padding: 2px;
  color: red;
  float: right;
  text-decoration: none;
  margin-top: -2em;
}