/*
 * custom.css — Complete standalone styles
 * Scholarly renaissance notebook: black/white/grey + muted burgundy
 * No theme dependency. Only requires font-awesome.min.css for icons.
 */

/* ── Fonts ─────────────────────────────────────────────────── */
@import url("https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,400;0,500;0,600;0,700;1,400;1,500&family=Inter:wght@400;450;500&family=Noto+Serif+SC:wght@400;500;600&display=swap");

/* ── Tokens ────────────────────────────────────────────────── */
:root {
	--ink: #1a1a1a;
	--charcoal: #333;
	--text: #3a3a3a;
	--text-light: #666;
	--text-muted: #999;
	--border: #e0e0e0;
	--border-light: #eee;
	--bg: #fff;
	--bg-warm: #f9f8f6;
	--accent: #8b2635;
	--accent-light: #a63d4b;
	--accent-faint: rgba(139, 38, 53, 0.05);
	--serif: "Cormorant Garamond", Georgia, "Times New Roman", serif;
	--sans: "Inter", -apple-system, "Helvetica Neue", Arial, sans-serif;
}

/* ── Reset & base ──────────────────────────────────────────── */
*, *::before, *::after {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}

html {
	scroll-behavior: smooth;
	scroll-padding-top: 5em;
}

body {
	font-family: var(--sans);
	font-size: 15px;
	line-height: 1.7;
	color: var(--text);
	background: var(--bg);
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
}

/* ── Container ─────────────────────────────────────────────── */
.container {
	width: 92%;
	max-width: 60em;
	margin: 0 auto;
}

/* ── Typography ────────────────────────────────────────────── */
h2 {
	font-family: var(--serif);
	font-size: 1.9em;
	font-weight: 600;
	color: var(--ink);
	letter-spacing: -0.02em;
	margin-bottom: 0.15em;
	padding-bottom: 0.35em;
	border-bottom: 1px solid var(--border);
}

h3 {
	font-family: var(--serif);
	font-size: 1.25em;
	font-weight: 600;
	color: var(--charcoal);
	margin: 1.4em 0 0.4em;
}

p {
	margin-bottom: 0.85em;
}

strong, b {
	color: var(--charcoal);
	font-weight: 500;
}

a {
	color: var(--accent);
	text-decoration: none;
	transition: color 0.15s ease;
}

a:hover {
	color: var(--accent-light);
}

/* Body text links — subtle underline for discoverability */
.about-text a,
.note a,
.service-list a,
.section-note a {
	border-bottom: 1px solid rgba(139, 38, 53, 0.2);
}

.about-text a:hover,
.note a:hover,
.service-list a:hover,
.section-note a:hover {
	border-bottom-color: var(--accent);
}

/* ── Sticky header ─────────────────────────────────────────── */
.site-header {
	position: sticky;
	top: 0;
	z-index: 100;
	background: rgba(249, 248, 246, 0.95);
	backdrop-filter: blur(16px);
	-webkit-backdrop-filter: blur(16px);
	box-shadow: 0 1px 8px rgba(0, 0, 0, 0.05);
}

.header-inner {
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding: 1em 0;
}

.header-left {
	flex-shrink: 0;
}

.header-name {
	font-family: var(--serif);
	font-size: 1.5em;
	font-weight: 700;
	color: var(--ink);
	letter-spacing: -0.02em;
	text-decoration: none;
}

.header-name:hover {
	color: var(--ink);
}

.name-cn {
	font-family: "Noto Serif SC", "Songti SC", "SimSun", serif;
	font-weight: 600;
	font-size: 0.82em;
}

.header-email {
	font-size: 0.78em;
	color: var(--text-muted);
	margin-top: 0.15em;
	letter-spacing: 0.01em;
}

.header-right {
	display: flex;
	align-items: center;
	gap: 1.5em;
}

.header-nav {
	display: flex;
	gap: 1.4em;
}

.header-nav a {
	font-size: 0.78em;
	font-weight: 450;
	color: var(--text-light);
	letter-spacing: 0.04em;
	text-transform: uppercase;
}

.header-nav a:hover {
	color: var(--accent);
}

/* Separator between nav and icons */
.header-icons {
	display: flex;
	gap: 0.75em;
	padding-left: 1.5em;
	border-left: 1px solid var(--border);
}

.header-icons a {
	color: var(--text-muted);
	font-size: 0.95em;
	transition: color 0.15s ease;
}

.header-icons a:hover {
	color: var(--accent);
}

/* ── About section ─────────────────────────────────────────── */
.about {
	display: flex;
	gap: 2.5em;
	align-items: center;
	padding: 3em 0 2.5em;
}

.about-photo {
	flex-shrink: 0;
	width: 220px;
	padding: 6px;
	background: var(--bg-warm);
	border: 1px solid var(--border);
	border-radius: 4px;
}

.about-photo img {
	width: 100%;
	height: auto;
	display: block;
	border-radius: 2px;
	filter: saturate(0.85);
	transition: filter 0.3s ease;
}

.about-photo:hover img {
	filter: saturate(1);
}

.about-text {
	flex: 1;
	min-width: 0;
	font-size: 0.95em;
	line-height: 1.85;
}

.about-text p:last-child {
	margin-bottom: 0;
}

/* ── Sections ──────────────────────────────────────────────── */
section {
	padding: 2.5em 0;
}

/* Divider — short centered rule, not full width */
.divider {
	border: none;
	width: 4em;
	border-top: 1px solid var(--border);
	margin: 0 auto;
}

.section-note {
	color: var(--text-light);
	font-size: 0.9em;
	margin-bottom: 1.2em;
}

/* ── Publication list ──────────────────────────────────────── */
.pub-list {
	list-style: none;
}

.pub-list > li {
	padding: 1em 1.2em;
	margin-bottom: 0.4em;
	border-radius: 4px;
	background: var(--bg-warm);
	border-left: 2px solid var(--border);
	transition: border-color 0.2s ease;
}

.pub-list > li:hover {
	border-left-color: var(--accent);
}

.pub-title {
	display: block;
	font-family: var(--serif);
	font-size: 1.1em;
	font-weight: 600;
	color: var(--ink);
	line-height: 1.4;
	margin-bottom: 0.2em;
}

.pub-authors {
	display: block;
	font-size: 0.86em;
	color: var(--text-light);
	line-height: 1.5;
	margin-bottom: 0.25em;
}

.pub-authors strong {
	color: var(--charcoal);
	font-weight: 500;
}

/* et al. toggle */
.etal-toggle { display: none; }

.etal-label {
	color: var(--text-light);
	font-style: italic;
	cursor: pointer;
	border-bottom: 1px dashed var(--border);
}

.etal-label:hover {
	color: var(--charcoal);
	border-bottom-color: var(--charcoal);
}

.etal-full { display: none; }
.etal-toggle:checked ~ .etal-label { display: none; }
.etal-toggle:checked ~ .etal-full { display: inline; }

/* Venue + links */
.pub-meta {
	display: flex;
	align-items: center;
	gap: 0.5em;
	flex-wrap: wrap;
}

.pub-venue {
	font-size: 0.75em;
	font-weight: 500;
	letter-spacing: 0.05em;
	text-transform: uppercase;
	color: var(--text-muted);
}

.pub-links {
	display: inline-flex;
	gap: 0.3em;
}

.pub-links a {
	font-size: 0.78em;
	font-weight: 450;
	color: var(--text-light);
	padding: 0.1em 0.5em;
	border: 1px solid var(--border);
	border-radius: 3px;
	background: var(--bg);
	transition: all 0.15s ease;
}

.pub-links a:hover {
	background: var(--accent-faint);
	border-color: var(--accent);
	color: var(--accent);
}

.pub-award {
	font-family: var(--serif);
	font-weight: 600;
	font-size: 0.82em;
	font-style: italic;
	color: var(--accent);
}

/* ── Service section ──────────────────────────────────────── */
#service {
	font-size: 0.95em;
}

.note {
	font-family: var(--serif);
	font-style: italic;
	font-size: 1.05em;
	color: var(--text-light);
	font-weight: 500;
	line-height: 1.7;
	padding: 0.8em 1.2em;
	background: var(--bg-warm);
	border-left: 2px solid var(--accent);
	border-radius: 4px;
	margin-bottom: 1em;
}

.note-highlight {
	color: var(--accent);
	font-weight: 600;
}

.service-list {
	list-style: none;
	margin-top: 0.2em;
}

.service-list li {
	padding: 0.3em 0;
	line-height: 1.65;
}

.service-cat {
	display: inline-block;
	font-size: 0.75em;
	font-weight: 500;
	text-transform: uppercase;
	letter-spacing: 0.05em;
	color: var(--text-muted);
	margin-right: 0.4em;
	min-width: 7em;
}

/* ── Footer ───────────────────────────────────────────────── */
.site-footer {
	background: var(--bg-warm);
	padding: 1.8em 0;
	text-align: center;
}

.site-footer p {
	font-family: var(--serif);
	color: var(--text-muted);
	font-size: 0.82em;
	font-style: italic;
	letter-spacing: 0.01em;
}

/* ── Selection ─────────────────────────────────────────────── */
::selection {
	background: rgba(139, 38, 53, 0.1);
	color: var(--ink);
}

/* ── Scrollbar (webkit) ────────────────────────────────────── */
::-webkit-scrollbar { width: 7px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: #ccc; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #aaa; }

/* ── Responsive ────────────────────────────────────────────── */
@media screen and (max-width: 680px) {
	body { font-size: 14px; }

	.header-inner {
		flex-direction: column;
		align-items: flex-start;
		gap: 0.4em;
	}

	.header-right { gap: 1em; }
	.header-nav { gap: 0.8em; }

	.header-icons {
		border-left: none;
		padding-left: 0;
	}

	.about {
		flex-direction: column;
		gap: 1.5em;
		align-items: center;
		text-align: center;
	}

	.about-photo { width: 180px; }

	.service-cat {
		display: block;
		margin-bottom: 0.15em;
	}
}

/* ── Print ─────────────────────────────────────────────────── */
@media print {
	.site-header { position: static; backdrop-filter: none; box-shadow: none; }
	.header-nav, .header-icons { display: none; }
	body { font-size: 10pt; }
}