jack.css

*{
  margin: 0;
  padding: 0;
}
html body{
  height: 100%;
  width: 100%;
  overflow-y: hidden;
}
.mob{
  display: none;
}
nav{
  position: absolute;
  width: 100%;
  height: 7%;
  background-color: #0a424d;
  display: flex;
  flex-direction: column;
}
nav ul{
  display: flex;
  flex-direction:row;
  position: relative;
  margin: 0.71%;
  justify-content: center;
  align-items: center;
  text-align: center;
  vertical-align: middle;
}
nav ul li{
  display: flex;
  align-items: center;
  margin: 0 2% 0 2%;
  cursor: pointer;
  padding: 1px;
  border-radius: 14px;
  color: white;
}
nav ul li:hover{
  border: 1px solid grey;
  background-color: orange;
}
#foro{
  display: flex;
  flex-direction: column;
  width: 10%;
}
#mein{
  display: flex;
  position: absolute;
  width: 100%;
  height: 100vh;
  align-items: center;
  margin-top: 5%;
}
header{
  width: 100%;
  text-align: center;
  position: absolute;
  top: 30px;
  font-family: sans-serif;
}
#ondo1{
  position: relative;
}
.cuad{
  position: absolute;
  width: 27.1%;
  height: auto;
  padding: 3px;
  border: 1px solid black;
  box-shadow: 3px 2px 9px;
  text-align:center;
  border-radius: 15px;
  cursor: pointer;
  font-family: fantasy;
}
.cuad:hover{
  height: 37.7%;
  border: 1px solid gold;
}
.uno{
  top: 7%;
  left: 7%;
}
.dos{
  left: 7%;
  top: 47%;
}
.tres{
  left: 70%;
  top: 7%;
}
.cuatro{
  left: 70%;
  top: 47%;
}
#foti{
  width: 137px;
  position: absolute;
  bottom: 10px;
  left: 45%;
  border: 2px solid gold;
  border-radius: 50%;
  box-shadow: 1px 2px 9px;
}
div a{
  list-style: none;
  color: black;
}
@media only screen and (max-width: 730px) {
  html body {
    background-color: rgb(26, 18, 80);
    overflow: hidden;
    overflow-y: hidden;
    z-index: -1;
  }
  .des{
    display: none;
  }
  .mob{
    display: flex;
    height: 100%;
    z-index: 10;
  }
  #mein{
  display: flex;
  position: absolute;
  width: 100%;
  height: 70vh;
  top: 25%;
  align-items: center;
  margin-top: 5%;
  justify-content: center;
}
  .mob nav {
   display: none;
  }
  .cuad{
    background-color: aliceblue;
  }
  .cuad p{
    display: none;
  }
  #foti{
  width: 97px;
  margin: 7px;
  position: absolute;
  left: 0%;
  bottom: 83%;
  border: 2px solid gold;
  border-radius: 50%;
  box-shadow: 1px 2px 9px;
}
  .mob header h1{
    display: none;
  }
  .cuad h2{
    size: 0.8em;
    font-size: 1em
  }
  .cuad:hover{
  height: 7.7%;
  border: 1px solid gold;
}
  #ondo1{
    position: absolute;
    margin: auto;
    width: 70%;
    left: 25%;
    bottom: 90%;
    z-index: -1;
  }
}