style.css

:root {
    margin: 0px;
    font-family:  'Space Mono', monospace;
    font: monospace;
}
body {
    margin: 4px auto;
    padding: 0 1px;
    max-width: 100ch;
    margin-top: 30px;
}
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background-color: white; 
}
::-webkit-scrollbar-thumb {
    background: rgb(0, 255, 127); 
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: rgb(0, 255, 127, 0.5);
}
* {
    border-radius: 5px;
    transition-duration: .2s;
    outline: none;
}
a {
    color: rgb(0, 255, 127);
}
header {
    text-align: center;
    background-position: center;
    background-size: 140%;
}
#features {
    box-shadow: 5px 5px 10px rgba(0, 255, 127, 0.3);
    padding: 20px;
    width: 75%;
    margin: 10px auto;
    background-color: 	rgba(0, 255, 127, 0.1);
    border: springgreen 1px solid;
}
#features:hover{
    box-shadow: 5px 5px 15px rgba(0, 255, 127, 0.3);
    padding: 25px;
    width: 80%;
}
#open {
    padding: 30px;
    margin: 10px auto;
    background-color: 	springgreen;
    border: springgreen 1px solid;
    box-shadow: 5px 5px 10px rgba(0, 255, 127, 0.3);
    font-size: x-large;
    border-radius: 200px;
    color: black;
}
#open:hover{
    box-shadow: 5px 5px 15px rgba(0, 255, 127, 0.3);
    padding: 35px;
}