body {
    margin: 0;
}

table.layout {
    width: 100%;
    table-layout: fixed;
    border-collapse: separate;
    border-spacing: 1em 0;
    box-sizing: border-box;
}

td {
    vertical-align: top;
    overflow: hidden;
}

.sidebar-col,
.pad-col {
    width: 33.33%;
}

.pad-col {
    display: none;
}

.content-col {
    display: block;
    max-width: 45em;
    margin: 0 auto;
    padding: 0 1em;
    box-sizing: border-box;
}

#toggle {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 20;
    background: #eee;
    border: 1px solid #999;
    cursor: pointer;
}

body.has-sidebar.sidebar-closed .sidebar-col {
    display: none;
}

body.has-sidebar.sidebar-closed .pad-col {
    display: none;
}

body.has-sidebar:not(.sidebar-closed) .sidebar-col {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: min(33.33%, 28em);
    background: #fff;
    z-index: 10;
    overflow: auto;
    padding: 1em;
    box-sizing: border-box;
    border: 1px solid #ddd;
}

body.has-sidebar:not(.sidebar-closed) .content-col {
    visibility: hidden;
}

@media (max-width: 768px) {

    .sidebar-col,
    .pad-col,
    #toggle {
        display: none !important;
    }

    .content-col {
        width: 100%;
        max-width: 100%;
        padding: 0.5em;
    }
}