header{
  background-image: url("https://imagenesbonitas.co/wp-content/uploads/2018/01/fotos-de-portadas-para-Twitter-2.jpg");
  background-position:center;
  background-size: contain;
  text-align: center;
  margin-top: 10px;
  color: black;
  font-family: 'Carter One', cursive;
}
nav{
  font-family: monospace;
  text-align:center;
  color:#EFEDDC;
  font-size: 20px;
}

body {
  background-image: url(https://p4.wallpaperbetter.com/wallpaper/154/166/515/background-black-blackboard-board-wallpaper-preview.jpg);
  background-repeat: no-repeat;
  background-position: center;
  background-size:cover;
}

.acertijos {
  display: flex;
  float:left;
  flex-wrap: wrap;
  flex-direction: column;
  align-items: center;
  flex: 1 1 auto;
  justify-content:space-around;
  background-color: #211F30;
  color:#E29930;
  border:2px;
  font-family: monospace;
  border-color: blue;
  border-style: hidden;
  border-radius: 12px;
  padding: 5px;
  width:900px;
  height:700px;
  margin:inherit;

}
.textuno{
  border-radius: 8px;
  font-size: 16px;
}
.inputuno{
  width: 70px;
  border-radius: 8px;
  font-size: 16px;
}
.botonUno{
  background-color: #009C8C;
  border-radius: 12px;
  color: white;
  padding: 15px 32px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
}
.textdos{
  border-radius: 8px;
  font-size: 16px;
}
.inputdos{
  width: 70px;
  border-radius: 8px;
  font-size: 16px;
}
.botonDos{
  background-color: #009C8C;
  border-radius: 12px;
  color: white;
  padding: 15px 32px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
}
.resultado{
  color:crimson;
}
.resultadosegundo{
  color:crimson;
}

aside {
  font-family: monospace;
  color:#EFEDDC;
  float: none;
  margin-left:950px;
  margin-right: 30px;
  margin-top: 100px;
  font-size: 14px;
  text-align:justify;
}
.final{
  color:#009C8C;
  display: flex;
  text-align: center;
  margin-top: 50px;
}
footer{
  font-family: monospace;
  color: #E29930;
  font-size: 16px;
  margin-top: 40px;
}