.page-container {
    width: 100%;
    /*fill vertical space*/
    /*DO NOT USE HEIGHT: 100%*/
    height: 100%;
    flex: 1;
    /*scroll setting*/
    overflow-x: hidden;
    overflow-y: hidden;
    scrollbar-width: thin;
    scrollbar-color: var(--text-green) var(--bg-primary);
    background-image: url(../images/background.svg);
    background-position: center;
    background-repeat: no-repeat;
    background-size: max(100vh, 768px);
    /*
    pending animation
    transform: translateY();
    this can create film strip illusion
    background-size: contain;
    */
    /* transform: translateY(0px); */
    padding: auto calc(var(--header-height) / 4) var(--header-height);
    transition: all 0.08s ease-in;
}

.page {
    width: calc(100% - var(--sub-navi-height));
    height: 100%;
    font-weight: bold;
    display: none;
    /*such that pull and push btns that outside of page can be triggered*/
    pointer-events: none;
}

/*such that pull and push btns that outside of page can be triggered*/
.page * {
    pointer-events: auto;
}

.page.active {
    display: flex;
}

/* MultiStepButton: armed (awaiting confirmation) */
.btn-armed {
    color: var(--text-orange) !important;
    border-color: var(--text-orange) !important;
    text-shadow: var(--text-shadow-orange);
}

@media (hover: hover) {
    .btn-armed:hover {
        background: var(--text-orange) !important;
        color: var(--bg-primary) !important;
        box-shadow: 0 0 10px var(--text-orange) !important;
    }
}

button[aria-busy="true"] {
    opacity: 0.6;
    pointer-events: none;
}

.page-flex-direction-row {
    flex-direction: row;
    justify-content: center;
}

.page-flex-direction-row>div {
    flex: 1;
}