/* body margin */
body {
	margin: 0;
	width: 100vw;
	height: 100vh;
}

/* vertical center card in body */
body {
	display: flex;
	flex-direction: column;
	justify-content: center;
}

/* default font sizes (mobile) */
.mobile #card .foreign { font-size: 1.75rem; }
.mobile #card .native { font-size: 1.25rem; }

/* default font sizes (desktop) */
#card .foreign { font-size: 1.5rem; }
#card .native { font-size: 1.0rem; }

/* default text alignment and layout */
#card { text-align: center; }
#card > * > span { display: block; }

/* separator defaults */
#separator {
	border: none;
	opacity: 20%;
	margin: 0;
}

/* separator color */
#separator { background-color: black; }
.nightMode #separator,
.night_mode #separator { background-color: white; }

/* separator size */
#card.horizontal-layout #separator { height: 10px; }
#card.vertical-layout #separator { width: 10px; }

/* hide answer and separator on card front */
#card.front #back,
#card.front hr,
#card.front ruby rt.hidden {
	display: none !important;
}

/* extra space above complete translated sentence */
#card #back #sentence-translation { margin-top: 2em; }

/* blur spoiler */
.spoiler {
	transition: filter 300ms;
	cursor: pointer;
}
.spoiler.hidden { filter: blur(0.3rem); }
.spoiler.visible { filter: blur(0rem); }

/* fill display horizontally or vertically */
#card.horizontal-layout { width: 100vw; }
#card.vertical-layout { height: 100vh; }

/* grid column layout for vertical card layout */
#card.vertical-layout > * { grid-row: 1; }
#card.vertical-layout {
	display: grid;
	grid-auto-columns: 1fr auto auto;
}
#card.vertical-layout #back { flex-direction: column; }
#card.vertical-layout #back,
#card.vertical-layout #front {
	display: flex;
	justify-content: center;
}

/* grid column settings */
#card.vertical-layout #back { grid-column: 1; }
#card.vertical-layout #separator { grid-column: 2; }
#card.vertical-layout #front { grid-column: 3; }

/* default text element spacing */
#card.horizontal-layout > * > span,
#card.vertical-layout > #back > span {
	padding: 0 1em;
	margin: 0.5em auto;
}
#card.vertical-layout #sentence {
	padding: 1em 0;
	margin: auto 0.5em;
}
/* mobile spacing */
.mobile #card.horizontal-layout > * > span,
.mobile #card.vertical-layout > #back > span { padding: 0 0.5em; }

/* vertical japanese text only in sentence */
#card.vertical-layout #sentence { writing-mode: vertical-rl; }

/* max text column width (~30 characters in japanese, ~50 in latin) */
#card.vertical-layout #sentence { max-height: 30em; }
#card.horizontal-layout span,
#card.vertical-layout #back span {
	max-width: 30em;
	margin-left: auto;
	margin-right: auto;
}

/* display kana reading below kanji in vertical layout */
#card.vertical-layout #target-word-reading .reading { display: block; }

/* tag container */
#card #back #tags {
	display: flex;
	justify-content: center;
	align-items: center;
	flex-wrap: wrap;
	gap: 4px;
	margin: 2em 0.5em 0.5em 0.5em;
	max-width: unset;
	padding: 10px;
	opacity: 60%;
	transition: opacity 0.3s;
}

/* tag style */
#card #back #tags .tag { background-color: hsl(calc(1deg * var(--tag-hue)), 60%, 20%); }
.nightMode #card #back #tags .tag,
.night_mode #card #back #tags .tag { background-color: hsl(calc(1deg * var(--tag-hue)), 65%, 80%); }
#card #back #tags .tag .inner { color: white; }
.nightMode #card #back #tags .tag .inner,
.night_mode #card #back #tags .tag .inner { color: black; }
#card #back #tags .tag {
	--tag-hue: 0;
	padding: 4px;
	border-radius: 999px;
	margin: 0;
	transition-property: padding, grid-template-rows, grid-template-columns;
	transition-duration: 0.3s;
	overflow: hidden;
	position: relative;
	display: grid;
	grid-template-rows: 0fr;
	grid-template-columns: 0fr;
}
#card #back #tags .tag .inner {
	position: relative;
	opacity: 0;
	transform: translate(-50%, -50%);
	transition-duration: 0.3s;
	transition-property: opacity, transform;
	white-space: nowrap;
	min-height: 0;
	min-width: 0;
	user-select: none;
	cursor: default;
}

/* tag hover/hold expand */
#card #back #tags:active,
#card #back #tags:hover {
	opacity: 1;
}
#card #back #tags:active .tag .inner,
#card #back #tags:hover .tag .inner {
	transform: translate(0%, 0%);
	opacity: 1;
}
#card #back #tags:active .tag,
#card #back #tags:hover .tag {
	grid-template-rows: 1fr;
	grid-template-columns: 1fr;
	padding: 4px 12px;
}

/* display tags vertically on mobile */
.mobile #card.vertical-layout #back #tags { flex-direction: column; }
.mobile #card.vertical-layout #back #tags .tag { max-width: max-content; }

/* make sure to hide empty fields */
.parse.empty { display: none !important; }

/* don't break syllables in the reading field on vertical mobile */
.mobile #card.vertical-layout #back #target-word-reading .reading .syllable { white-space: nowrap; }

/* word note style */
#card #target-word-reading {
	display: inline-block;
	position: relative;
}
.mobile #card #target-word-reading .note { left: 0.5em; }
#card #target-word-reading .note {
	position: absolute;
	left: 1em;
	top: 50%;
	transform: translate(-100%, -50%);
	font-style: italic;
	opacity: 50%;
	font-size: 0.75em;
}