/**
 * Three-layer parallel reader: toolbar + rows of original / pinyin / English.
 *
 * Server-side markup per row:
 *   .csm-row > .csm-cell--zh (.csm-zh--t, .csm-zh--s) | .csm-cell--py | .csm-cell--en
 *
 * State lives as classes on .csm-reader, so switching is CSS-only for the
 * script toggle and needs no re-render — both character sets are in the HTML,
 * which also keeps the content visible to crawlers.
 */

.csm-reader {
	--csm-zh-size: 17px;
	background: #fff;
	border: 1px solid var(--csm-line);
	border-radius: 4px;
	overflow: hidden;
}

/* ---------- toolbar ---------- */
.csm-reader__bar {
	display: flex;
	align-items: center;
	gap: 10px;
	flex-wrap: wrap;
	padding: 9px 20px;
	background: var(--csm-paper-2);
	border-bottom: 1px solid var(--csm-line);
	position: sticky;
	top: 0;
	z-index: 20;
}
.csm-reader__bar .csm-label { margin: 0; }
.csm-seg { display: flex; border: 1px solid var(--csm-line); border-radius: 3px; overflow: hidden; background: #fff; }
.csm-seg button {
	border: 0;
	background: #fff;
	font: inherit;
	font-size: 12.5px;
	padding: 6px 12px;
	cursor: pointer;
	color: var(--csm-ink-2);
	border-right: 1px solid var(--csm-line);
}
.csm-seg button:last-child { border-right: 0; }
.csm-seg button:hover { background: var(--csm-paper-2); }
.csm-seg button[aria-pressed="true"] { background: var(--csm-ink); color: var(--csm-paper); }
.csm-seg button[aria-pressed="true"]:hover { background: var(--csm-ink); }
.csm-reader__right { margin-left: auto; display: flex; gap: 8px; align-items: center; }
.csm-reader__count { font-size: 12.5px; color: var(--csm-ink-3); }

/* ---------- rows ---------- */
.csm-row {
	display: grid;
	grid-template-columns: 1fr 1fr 1.15fr;
	border-bottom: 1px solid #F0EADD;
	transition: background .12s;
}
.csm-row:last-child { border-bottom: 0; }
.csm-row:hover { background: #FDFBF6; }
.csm-cell {
	padding: 16px 24px;
	border-right: 1px solid #F0EADD;
	position: relative;
}
.csm-cell:last-child { border-right: 0; }
.csm-cell--zh {
	font-family: var(--csm-han);
	font-size: var(--csm-zh-size);
	line-height: 1.95;
	letter-spacing: .05em;
	color: #231F1A;
}
.csm-cell--py { font-size: 13px; line-height: 1.95; color: var(--csm-ink-3); letter-spacing: .03em; }
.csm-cell--en { font-size: 14.5px; line-height: 1.8; color: var(--csm-ink-2); font-family: var(--csm-sans); }
.csm-para-no {
	position: absolute;
	top: 16px;
	left: 8px;
	width: 16px;
	text-align: center;
	font-size: 10.5px;
	color: var(--csm-line);
	font-family: var(--csm-sans);
}

/* ---------- script toggle (both sets are in the DOM) ---------- */
.csm-zh--s { display: none; }
.csm-reader.is-simp .csm-zh--t { display: none; }
.csm-reader.is-simp .csm-zh--s { display: inline; }

/* ---------- view modes ---------- */
.csm-reader.mode-en .csm-cell--zh,
.csm-reader.mode-en .csm-cell--py { display: none; }
.csm-reader.mode-en .csm-row { grid-template-columns: 1fr; }

.csm-reader.mode-zh .csm-cell--en { display: none; }
.csm-reader.mode-zh .csm-row { grid-template-columns: 1fr 1fr; }
.csm-reader.mode-zh.no-py .csm-cell--py { display: none; }
.csm-reader.mode-zh.no-py .csm-row { grid-template-columns: 1fr; }

.csm-reader.no-py .csm-cell--py { display: none; }
.csm-reader.no-py .csm-row { grid-template-columns: 1fr 1.15fr; }
.csm-reader.mode-zh.no-py .csm-row { grid-template-columns: 1fr; }

/* ---------- font sizes ---------- */
.csm-reader.fs-1 { --csm-zh-size: 15.5px; }
.csm-reader.fs-3 { --csm-zh-size: 19.5px; }

/* ---------- head-term highlight (glossary occurrences) ---------- */
.csm-hl {
	color: var(--csm-cinnabar, #9E2B25);
	font-weight: 600;
	background: rgba(158, 43, 37, .06);
	padding: 0 1px;
	border-radius: 2px;
}

/* ---------- progress ---------- */
.csm-progress {
	position: fixed;
	top: 0;
	left: 0;
	height: 2.5px;
	width: 0;
	background: var(--csm-cinnabar);
	z-index: 90;
	transition: width .1s linear;
}

@media (max-width: 820px) {
	.csm-row { grid-template-columns: 1fr; }
	.csm-cell {
		border-right: 0;
		border-bottom: 1px solid #F0EADD;
		padding: 12px 20px 12px 34px;
	}
	.csm-cell:last-child { border-bottom: 0; }
	.csm-cell--zh { font-size: 16px; }
	.csm-reader.mode-zh .csm-row { grid-template-columns: 1fr; }
	.csm-reader.no-py .csm-row { grid-template-columns: 1fr; }
}

@media print {
	.csm-reader__bar, .csm-progress { display: none; }
	.csm-reader { border: 0; }
	.csm-row { break-inside: avoid; }
}