.headerstyle {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: #333333;
    width: max-content;
}
.headerstyle li {
    float:left;
}
.headerstyle li a {
    display: block;
    color: white;
    text-align: center;
    padding: 18px;
    text-decoration: none;
}
.headerstyle li a:hover {
    background-color: #111111;

}

div.headerstyle{
    border: 3px solid;
}

div.pclist{
    border: 3px double;
    border-radius: 10px;
    padding: 10px;
    width: max-content;
    flex: auto;
}