.button-ui {
    font-family: monospace;
}
*[hidden] {
    display: none !important;
}



#myApp {
    position: absolute;
    left: 0; right: 0; top: 0; bottom: 0; /* inset: 0; */
    z-index: 10;

    display: flex;
    flex-direction: column;

    background: var(--color-theme--background, #ffffff);
    color: var(--color-theme--color, #000000);
}

#app_NavigationBar, #app_FooterBar {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    --border-style: 1px solid #aaaaaa;
    user-select: none;
}
#app_NavigationBar {
    padding: 1em;
    border-bottom: var(--border-style);
}
#app_FooterBar {
    border-top: var(--border-style);
}

#app_ContentArea {
    flex: 1;
    overflow: auto;
}


.STextBox {
    border: 1px solid var(--border-color, black);
    border-radius: 10px;
    padding: 5px;
    box-sizing: border-box;
    min-height: max-content;
    line-height: 1em;
    overflow-x: /*auto*/hidden;
    overflow-y: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    transition: .1s;
    height: calc(1em + 16px);
    /*display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;*/
}
/* .STextBox:empty::after {
    content: "⁠";
} */

#nav_ArtTitleBox {
    width: 20em;
    max-width: 50%;
    text-align: center;
    cursor: pointer;
    --border-color: #cccccc;
}
#nav_ArtTitleBox:hover {
    background-color: var(--color-theme--btn-hover-color);
}
#nav_ArtTitleBox:active {
    background-color: var(--color-theme--btn-active-color);
}
#nav_ArtTitleBox:focus-visible {
    outline: 2px solid #a0cfff;
    outline-offset: 1px;
}

#app_FooterBar button {
    all: initial;
    font-family: inherit;
    cursor: pointer;
    outline: revert;
    padding: 0.5em;
    font-size: large;
    user-select: none;
    transition: .1s;
}
#app_FooterBar button:hover {
    background-color: var(--color-theme--btn-hover-color);
}
#app_FooterBar button:active {
    background-color: var(--color-theme--btn-active-color);
}
#app_FooterBar .uiText {
    font-family: monospace;
}
#app_FooterBar .describeText {
    font-family: inherit;
}