*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  font-size: 16px;
}
body {
  font-family: sans-serif;
  background: #fcfcd4;
  overflow: hidden;
}
h1 {
  position: relative;
  text-align: center;
  align-items: center;
  box-sizing: 10px 20px;
  margin: 20px 20px 40px 20px;
  padding: 15px;
  height: 75px;
  border: 2px solid #8d8651;
  background: #f2e28b;
}
.caja {
  background-color: #f2e28b;;
  border: 3px solid #8d8651;
  height: 550px;
  margin: 10px 20px 0 20px;
  padding: 10px;
  position: relative;
}
.menu {
  display: flex;
  list-style: none inside;
  padding: 0;
  margin: 0 0 0 20px;
}
a {
  border: 2px solid #8d8651;
  background: #f2e28b;
  color: black;
  text-decoration: none;
  font-weight: bold;
  text-align: center;
  border-radius: 0 15px 0 0;
  padding: 15px;  
}
a:active{
  color: white;
  text-decoration: none;
}
ul.pestanas li{
  opacity: 0;
  transition: opacity .5s;
  position: absolute;
  list-style: none inside;
}
ul.pestanas li:target {
  opacity: 1;
}
h2 {
  margin-bottom: 10px;
}
p {
  margin-bottom: 10px;
}
