*{
    margin: 0px;
    padding: 0px;
    box-sizing: border-box;
}

html, body{
    height: 100%;
    overflow: hidden;
}

.n-button{
    width: 6em;
    text-align: center;
    padding: .5em;
    margin: .5em;
    background-image: linear-gradient(#a9a9a9, #aaaaaa, #a9a9a9);
    color: #323232;
    border-radius: .25em;
    transition:  background-image .3s;
}

.n-button:hover{
    background-image: linear-gradient(#323232, #424242, #323232);
    color: beige;
}

.n-button:active{
    background-color: aliceblue;
    color: "black";
}