#app-menubar
{
    height:28px;
    background:#0c0c0c;
    border-bottom:1px solid #00ffff55;

    display:flex;
    align-items:stretch;

    font-size:13px;
    font-family:monospace;

    z-index:20000;
    position:relative;
}

.menu-item
{
    position:relative;
    padding:4px 12px;
    color:#00ffff;
    cursor:pointer;
    display:flex;
    align-items:center;
    box-sizing:border-box;
}

.menu-item:hover,
.menu-item.open
{
    background:#00ffff22;
}

.menu-dropdown
{
    display:none;

    position:absolute;
    top:100%;
    left:0;

    background:#101010;
    border:1px solid #00ffff55;

    min-width:160px;
    z-index:20001;
    pointer-events:auto;
}

.menu-item.open .menu-dropdown
{
    display:block;
}

.menu-entry
{
    padding:6px 12px;
    cursor:pointer;
}

.menu-entry:hover
{
    background:#00ffff22;
}

.menu-separator
{
    height:1px;
    background:#00ffff44;
    margin:4px 0;
}

.submenu
{
    position:relative;
}

.submenu > .menu-entry::after
{
    content: ">";
    float: right;
    opacity: 0.72;
}

.submenu-panel
{
    display:none;

    position:absolute;
    left:100%;
    top:0;

    background:#101010;
    border:1px solid #00ffff55;
    min-width:150px;
    z-index:5001;
}

.submenu.open .submenu-panel
{
    display:block;
}


.gui-button
{
    background:#0c0c0c;
    border:1px solid #00ffff;
    color:#00ffff;

    padding:6px 14px;
    margin:2px;

    cursor:pointer;

    font-family:monospace;
}

.gui-button:hover
{
    background:#00ffff22;
}

#main-layout
{
    display: flex;
    width: 100%;
}

#editor-area
{
    flex: 1;
    min-width: 0;   /* IMPORTANT */
    display: flex;
    flex-direction: column;
    justify-content: flex-end;   /* preview anchored bottom */
}

#asset-panel
{
    width: 320px;
    flex-shrink: 0;
    border-left:1px solid #00ffff55;
}


#asset-tabs
{
    display:flex;
    border-bottom:1px solid #00ffff55;
}

.asset-tab
{
    flex:1;
    padding:6px;
    text-align:center;

    cursor:pointer;

    color:#00ffff;
}

.asset-tab.active
{
    background:#00ffff22;
}

#asset-list
{
    flex:1;
    overflow-y:auto;
}



.asset-item
{
    display:flex;
    gap:10px;

    padding:8px;

    border-bottom:1px solid #00ffff22;
    cursor:pointer;
}

.asset-item:hover
{
    background:#00ffff11;
}

.asset-thumb
{
    width:80px;
    height:45px;
    background:#222;
}

.asset-title
{
    color:#00ffff;
    font-size:12px;
}

#asset-content
{
    position: relative;
    flex: 1;
}

.asset-panel-content
{
    display: none;
    flex-direction: column;
    gap: 6px;
    padding: 6px;
}

.asset-panel-content.active
{
    display: flex;
}