*{
    box-sizing: border-box;
}

*:hover{
    border-radius:200px;
}

html, body {
    margin: 0;
    height: 100%;
}

body{
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    color: white;
    background-color: black;
}

body:hover{
    color: red;
    background-color: blue;
}

.close{
    border: red 2px solid;
    position: absolute;
    right: 20px;
    top: 20px;
    width: 30px;
    height: 30px;
    text-align: center;
    line-height: 22px;
    font-weight: bold;  
    cursor: pointer;
    border-radius: 50%;
}

.close:hover{
    position:relative;
    top:-200;
    right:-200;
}

main{
    border: 1px solid #7bff00;
    padding: 20px;
    margin: 10px auto;
    max-width: 800px;
    box-shadow: 0 5px 10px #7bff00;
    z-index: -1;

}

section{
    border: 1px solid #7bff00;
    padding: 10px;
    margin: 10px;
    border-radius: 5px;
    z-index: 2;
}

section:hover{
    background-color:red;
    color:rgb(149, 0, 255);
}

.col{
    display: inline-block;
    width: calc(33.33% - 20px);
    vertical-align:top;
    min-height: 250px;
}

footer{
    padding: 0 10px;
}

.test{
    position: fixed;
    top: -50px;
    right: -50px; 
    z-index: 0;
}

.test:hover{
    position: relative;
    top:-300px;
    right:-200px;
    width: 100%;
    z-index: 3;
}

pre{
    color:black;
    font-size:xx-small;
}

pre:hover{
    color: white;
    z-index: 4;
    position:relative;
    top:-400px;
    right: -150px;
    font-size:larger;}