*{box-sizing: border-box;}

body{
    background-color: #000;
    color: #fff;
    font-family: Arial, Helvetica, sans-serif;
}

#frame{
    width: 1100px;
    margin: auto;
    padding: 5px;
}

#gallery{
    text-align: center;
}

#gallery>img{
    margin: 5px 2px;
    height: 260px;
    vertical-align: middle;
    border: 1px solid #000;
    outline: 1px solid #fff;
}

hr{
    border: transparent;
    border-top: 2px dotted #fff;
}

p{
    margin: 0 2px;
}

a{
    background-color: #fff;
    color: #000;
}

summary{
    list-style: none;
}

summary>span{
    background-color: #fff;
    color: #000;
    text-decoration: underline;
    pointer-events: none;
}

li{
    list-style-type: square;
    line-height: 1.3;
}

nav > ul{
    margin: 6px 0 3px 0;
    padding: 0;
}

nav > ul > li{
    margin: 2px 0;
    padding: 0;
    list-style-type: none;
}