keeweb/app/styles/areas/_app.scss

.app {
    @include size(100%);
    display: flex;
    align-items: stretch;
    flex-direction: column;
    justify-content: flex-start;

    .titlebar-hidden-inset & {
        -webkit-app-region: drag;
    }

    &__body {
        flex: 1;
        display: flex;
        align-items: stretch;
        flex-direction: row;
        justify-content: flex-start;
        overflow: hidden;
    }

    &__titlebar-drag {
        position: absolute;
        width: 100%;
        height: 30px;
        top: 0;
        right: 0;
        -webkit-app-region: drag;
        pointer-events: none;
    }

    &__menu {
        flex: 0 0 auto;
        display: flex;
        width: 15em;
        background-color: var(--secondary-background-color);
        @include mobile {
            &:not(.menu-visible) {
                display: none;
            }
        }
        transition: padding-top 150ms;
        .titlebar-hidden & {
            padding-top: $titlebar-padding-small;
        }
        .titlebar-hidden-inset & {
            padding-top: $titlebar-padding-large;
        }
        .titlebar-custom.titlebar-hidden &,
        .titlebar-custom.titlebar-hidden-inset & {
            padding-top: $titlebar-custom-height;
        }
        .fullscreen .app & {
            padding-top: 0;
        }
    }

    &__list-wrap {
        flex: 1;
        display: flex;
        align-items: stretch;
        flex-direction: row;
        justify-content: flex-start;
        overflow: hidden;
        &.app__list-wrap--table {
            flex-direction: column;
        }
    }

    &__menu-drag,
    &__list-drag {
        @include drag-handle;
        flex: 0 0 auto;
        width: 1px;
        cursor: col-resize;
        @include mobile {
            display: none;
        }
    }

    &__list-drag {
        .app__list-wrap--table & {
            width: auto;
            height: 1px;
            cursor: row-resize;

            .drag-handle__inner {
                top: -2px;
                left: 0;
                width: 100%;
                height: 5px;
            }
        }
    }

    .menu-visible + &__menu-drag {
        display: block;
    }

    &__list {
        flex: 0 0 25em;
        display: flex;
        align-items: stretch;
        flex-direction: column;
        overflow-y: auto;
        .titlebar-hidden & {
            padding-top: $titlebar-padding-tiny;
        }
        @include mobile {
            flex: 1 1;
            .app--details-visible & {
                display: none;
            }
        }
    }

    &__details {
        flex: 1;
        display: flex;
        overflow: hidden;
        padding: $base-spacing;
        position: relative;
        @include mobile {
            width: 100vw;
            padding: $base-padding;
            display: none;
            .app--details-visible & {
                display: flex;
            }
        }
        @include padding-if-titlebar;
    }

    &__panel {
        flex: 1;
        display: flex;
        overflow: hidden;
        position: relative;
        @include mobile {
            padding: $base-padding;
        }
    }

    &__footer {
        flex: 0 0 auto;
        border-top: light-border();
        background-color: var(--secondary-background-color);
    }

    &__beta {
        padding: $base-padding;
        text-align: center;
        background-color: var(--error-color);
        color: var(--text-contrast-error-color);
        > .fa {
            vertical-align: bottom;
        }
    }
}