body {
    background-color: black;
    color: white;
    font-family: 'Consolas', sans-serif;
}

input {
    border: 1px solid green;
    transition: 0.2s;
}
input:hover {
    border: 1px solid white;
}

.defBtn {
    width:100%;
    font-size: medium;
    border: 1px solid rgb(0,255,0);
    margin: 2px;
    padding: 2px;
    font-family: 'Consolas', sans-serif;
    background-color: black;
    color: white;
}

#mainbox {
    position: fixed;
    top: 50%;
    left: 50%;
    border: 4px solid rgb(0,255,0);
    background-color: rgba(0,0,0,0.5);
    padding: 5px;
    transform: translate(-50%, -50%);
}