html, body {
    color-scheme: dark;
    background-color: rgb(70, 70, 70);
    color: lavender;
    font-family:'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

div.spacer {
    border-top: 1px solid rgb(119, 119, 119);
    border-bottom: 1px solid rgb(119, 119, 119);
    max-width: 50%;
    height: 3px;
    margin-bottom: 20px;
}

button {
    padding: 5px;
}

div.content {
    margin:auto;
    width: 50%;
    max-width: 1000px;
    min-width: 500px;
    
    border: 1px solid rgb(177,177,177);
    border-radius: 8px;
    
    padding-left: 20px;
    padding-right: 20px;
    padding-bottom: 10px;
    padding-top: 10px;
    
    box-shadow: 0px 0px 10px lavender, inset 0px 0px 20px black;
}