/* === autozyx.com — Shared CSS === */
/* Warm academic style, Anthropic-inspired palette */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Playfair+Display:wght@400;600;700&display=swap');

/* --- Variables --- */
:root {
  --bg: #faf9f5;
  --text: #1a1a18;
  --accent: #c85a3a;
  --accent-light: #e8a08c;
  --border: #e0ded6;
  --card-bg: #ffffff;
  --card-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  --muted: #6b6960;
  --badge-bg: #f0eeea;
  --radius: 10px;
  --max-width: 960px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 1.15rem;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: 'Playfair Display', Georgia, serif;
  font-weight: 600;
  line-height: 1.3;
}

h1 { font-size: 2.2rem; }
h2 { font-size: 1.6rem; margin-bottom: 0.8rem; }
h3 { font-size: 1.3rem; margin-bottom: 0.5rem; }

a {
  color: var(--accent);
  text-decoration: none;
  transition: opacity 0.2s;
}

a:hover {
  opacity: 0.75;
}

img {
  max-width: 100%;
  height: auto;
}

ul {
  list-style: none;
}

/* --- Bilingual Toggle --- */
/* Default: Chinese visible, English hidden */
.en { display: none; }
.cn { display: inline; }

/* When body has class E: flip */
body.E .cn { display: none; }
body.E .en { display: inline; }

/* Block-level bilingual elements */
.en-block { display: none; }
.cn-block { display: block; }

body.E .cn-block { display: none; }
body.E .en-block { display: block; }

/* Flex bilingual */
.en-flex { display: none; }
.cn-flex { display: flex; }

body.E .cn-flex { display: none; }
body.E .en-flex { display: flex; }

/* Grid bilingual */
.en-grid { display: none; }
.cn-grid { display: grid; }

body.E .cn-grid { display: none; }
body.E .en-grid { display: grid; }

/* --- Language Toggle Button --- */
.lang-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 100;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 6px 16px;
  font-size: 0.85rem;
  font-family: 'Inter', sans-serif;
  font-weight: 500;
  color: var(--text);
  cursor: pointer;
  box-shadow: var(--card-shadow);
  transition: background 0.2s, box-shadow 0.2s;
}

.lang-toggle:hover {
  background: var(--badge-bg);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.1);
}

/* --- Layout --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 48px 0;
  border-bottom: 1px solid var(--border);
}

section:last-of-type {
  border-bottom: none;
}

/* --- Hero / Header --- */
.hero {
  text-align: center;
  padding: 72px 0 48px;
}

.avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  border: none;
  margin-bottom: 20px;
}

.hero h1 {
  margin-bottom: 8px;
}

.tagline {
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.6;
  max-width: 640px;
  margin: 0 auto;
}

/* --- Card Grid --- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--card-shadow);
  transition: box-shadow 0.2s, transform 0.2s;
}

.card:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.09);
  transform: translateY(-2px);
}

.card .emoji {
  font-size: 1.6rem;
  margin-bottom: 8px;
  display: block;
}

.card h3 {
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: 1.05rem;
  margin-bottom: 6px;
}

.card p {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.5;
}

.card a.card-link {
  display: inline-block;
  margin-top: 10px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--accent);
}

/* --- Badge --- */
.badge {
  display: inline-block;
  background: var(--badge-bg);
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 12px;
  margin-left: 8px;
  vertical-align: middle;
  letter-spacing: 0.02em;
}

.badge.accent {
  background: var(--accent);
  color: #fff;
}

/* --- Research Interests --- */
.research-list {
  padding-left: 0;
}

.research-list li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 10px;
  font-size: 1.05rem;
}

.research-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

/* --- Projects --- */
.project-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.project-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--card-shadow);
}

.project-card h3 {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 1.15rem;
  margin-bottom: 8px;
}

.project-card p {
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 10px;
}

/* --- Links Row --- */
.links-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
  padding: 32px 0;
}

.link-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 8px 18px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text);
  transition: background 0.2s;
}

.link-item:hover {
  background: var(--badge-bg);
}

.link-item svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* --- Lab Intro Section --- */
.lab-intro {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  text-align: center;
  box-shadow: var(--card-shadow);
}

.lab-intro p {
  color: var(--muted);
  margin-bottom: 16px;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  padding: 10px 28px;
  border-radius: 6px;
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: opacity 0.2s;
}

.btn:hover {
  opacity: 0.85;
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 1.5px solid var(--accent);
}

.btn-outline:hover {
  background: var(--accent);
  color: #fff;
}

/* --- Footer --- */
footer {
  padding: 32px 0;
  text-align: center;
  color: var(--muted);
  font-size: 0.88rem;
  border-top: 1px solid var(--border);
}

/* --- Lab Page Specifics --- */
.lab-header {
  text-align: center;
  padding: 48px 0 40px;
  border-bottom: 1px solid var(--border);
}

.lab-logo {
  max-width: 420px;
  width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
}

.lab-header h1 {
  margin-bottom: 8px;
}

.lab-header .subtitle {
  color: var(--muted);
  font-size: 1.05rem;
}

@media (max-width: 640px) {
  .lab-logo { max-width: 80%; }
}

.nav-back {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-bottom: 24px;
  font-size: 0.95rem;
  color: var(--accent);
}

/* --- Research Pillars Grid --- */
.pillar-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.pillar {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.pillar .number {
  display: inline-block;
  width: 32px;
  height: 32px;
  line-height: 32px;
  text-align: center;
  background: var(--accent);
  color: #fff;
  border-radius: 50%;
  font-weight: 700;
  font-size: 0.85rem;
  margin-bottom: 12px;
}

/* --- Publications --- */
.pub-list {
  list-style: none;
  padding: 0;
}

.pub-list li {
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
  font-size: 1rem;
}

.pub-list li:last-child {
  border-bottom: none;
}

.pub-year {
  display: inline-block;
  background: var(--badge-bg);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--muted);
  margin-right: 8px;
}

/* --- Collaborations --- */
.collab-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.collab-tag {
  background: var(--badge-bg);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 6px 16px;
  font-size: 0.9rem;
  color: var(--text);
}

.collab-category {
  margin-bottom: 20px;
}

.collab-category-label {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 8px;
  text-transform: none;
}

.collab-tag-sm {
  display: inline-block;
  background: var(--badge-bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 3px 12px;
  font-size: 0.82rem;
  color: var(--text);
  margin: 3px 4px 3px 0;
}

/* --- Publication Number --- */
.pub-num {
  display: inline-block;
  min-width: 22px;
  text-align: right;
  color: var(--muted);
  font-weight: 600;
  font-size: 0.9rem;
  margin-right: 8px;
}

.pub-list li .pub-journal {
  font-style: italic;
}

/* --- Teaching List --- */
.teaching-list {
  list-style: none;
  padding: 0;
}

.teaching-list li {
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  font-size: 1rem;
}

.teaching-list li:last-child {
  border-bottom: none;
}

/* --- Patent Line --- */
.patent-line {
  margin-top: 16px;
  padding: 12px 16px;
  background: var(--badge-bg);
  border-radius: var(--radius);
  font-size: 0.95rem;
}

/* --- Section Title --- */
.section-title {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}

.section-title::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* --- About Paragraphs --- */
.about-text p {
  margin-bottom: 16px;
  line-height: 1.8;
}

/* --- People --- */
.people-section .pi {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  margin-bottom: 24px;
}

.people-section .pi img {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border);
  flex-shrink: 0;
}

.placeholder-note {
  background: var(--badge-bg);
  border-radius: var(--radius);
  padding: 20px 24px;
  color: var(--muted);
  font-style: italic;
  text-align: center;
}

/* --- People Tables & Lists --- */
.people-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
  margin-bottom: 8px;
}

.people-table th,
.people-table td {
  text-align: left;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
}

.people-table th {
  font-weight: 600;
  color: var(--muted);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  background: var(--badge-bg);
}

.people-table tbody tr:last-child td {
  border-bottom: none;
}

.people-table tbody tr:hover {
  background: var(--badge-bg);
}

.student-group {
  margin-bottom: 20px;
}

.student-group-label {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 600;
  color: #fff;
  background: var(--accent);
  padding: 2px 10px;
  border-radius: 4px;
  margin-bottom: 8px;
}

.student-group-label.green {
  background: #3a8a5c;
}

.student-list {
  list-style: none;
  padding: 0;
}

.student-list li {
  padding: 8px 0 8px 16px;
  border-left: 3px solid #3a8a5c;
  margin-bottom: 6px;
  font-size: 0.95rem;
  background: var(--card-bg);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding-left: 14px;
}

.student-list li .student-name {
  font-weight: 600;
}

.student-list li .student-year {
  display: inline-block;
  background: var(--badge-bg);
  padding: 1px 6px;
  border-radius: 3px;
  font-size: 0.78rem;
  color: var(--muted);
  margin-left: 6px;
}

.student-list li .student-topic {
  display: block;
  color: var(--muted);
  font-size: 0.88rem;
  margin-top: 2px;
}

.undergrad-line {
  padding: 8px 0;
  font-size: 0.92rem;
  color: var(--text);
  border-bottom: 1px solid var(--border);
}

.undergrad-line:last-child {
  border-bottom: none;
}

.undergrad-line .undergrad-year {
  display: inline-block;
  font-weight: 600;
  color: var(--muted);
  min-width: 70px;
}

.people-subsection-title {
  margin-top: 32px;
  margin-bottom: 16px;
  font-size: 1rem;
  color: var(--muted);
  font-family: 'Inter', sans-serif;
  font-weight: 600;
}

/* --- Avatar Circles (Lab People) --- */
.avatar-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  margin-bottom: 16px;
}

.avatar-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  width: 80px;
}

.avatar-circle {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--badge-bg);
  border: 2px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--muted);
  flex-shrink: 0;
}

.avatar-item .avatar-name {
  font-size: 0.85rem;
  font-weight: 500;
  text-align: center;
  line-height: 1.3;
  color: var(--text);
}

.avatar-item a.avatar-name {
  color: var(--accent);
}

/* --- Alumni Simple List --- */
.alumni-list {
  list-style: none;
  padding: 0;
}

.alumni-list li {
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.95rem;
}

.alumni-list li:last-child {
  border-bottom: none;
}

/* --- Coming Soon Card --- */
.project-card.coming-soon {
  opacity: 0.6;
  text-align: center;
}

.project-card.coming-soon h3 {
  color: var(--muted);
}

/* --- Pub Links Row --- */
.pub-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 16px;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  h1 { font-size: 1.7rem; }
  h2 { font-size: 1.35rem; }

  .hero { padding: 56px 0 36px; }

  .card-grid,
  .pillar-grid {
    grid-template-columns: 1fr;
  }

  .project-grid {
    grid-template-columns: 1fr;
  }

  .links-row {
    gap: 10px;
  }

  .people-section .pi {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .lang-toggle {
    top: 12px;
    right: 12px;
    padding: 5px 12px;
    font-size: 0.8rem;
  }

  .container {
    padding: 0 16px;
  }

  section {
    padding: 36px 0;
  }
}

@media (max-width: 480px) {
  html { font-size: 15px; }
  h1 { font-size: 1.5rem; }

  .avatar {
    width: 96px;
    height: 96px;
  }

  .card { padding: 18px; }
  .project-card { padding: 18px; }
}

/* === Lab Page v3 Redesign === */
.people-section {
  margin-bottom: 48px;
}
.people-section-header {
  font-family: 'Playfair Display', serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 20px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--accent);
  display: inline-block;
}
.pi-card {
  display: flex;
  gap: 24px;
  align-items: center;
  background: var(--card-bg);
  padding: 24px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  margin-bottom: 32px;
}
.pi-card .avatar-large {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  flex-shrink: 0;
  object-fit: cover;
}
.pi-card .pi-info h4 {
  font-family: 'Playfair Display', serif;
  font-size: 1.3rem;
  margin-bottom: 6px;
}
.pi-card .pi-info .pi-title {
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 8px;
}
.pi-card .pi-info a {
  font-size: 0.9rem;
  font-weight: 500;
}
.people-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  margin-bottom: 32px;
}
.person-card {
  text-align: center;
  text-decoration: none;
  color: inherit;
  display: block;
  transition: transform 0.2s;
}
a.person-card:hover {
  text-decoration: none;
  transform: translateY(-2px);
}
a.person-card:hover .person-name {
  color: var(--accent);
}
.person-avatar-img {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  object-fit: cover;
  border: none;
  background: transparent;
  margin: 0 auto 12px;
  display: block;
}
.person-avatar {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: var(--badge-bg);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--muted);
  margin: 0 auto 12px;
  font-family: 'Playfair Display', serif;
}
.person-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
}
.person-role {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 4px;
  line-height: 1.4;
}
.student-row {
  margin-bottom: 28px;
}
.student-row-label {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 12px;
}
.student-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
}
.student-grid .person-avatar {
  width: 80px;
  height: 80px;
  font-size: 1.6rem;
}
.student-grid .person-name {
  font-size: 0.9rem;
}
.student-grid .person-role {
  font-size: 0.78rem;
}
.alumni-group {
  margin-bottom: 24px;
}
.alumni-group-label {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 12px;
}
.alumni-item {
  font-size: 0.92rem;
  padding: 6px 0;
  border-bottom: 1px dashed var(--border);
  color: var(--text);
}
.alumni-item .year {
  color: var(--muted);
  margin-left: 8px;
}
.alumni-item .topic {
  color: var(--muted);
  margin-left: 8px;
  font-size: 0.88rem;
}
.partner-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.partner-card {
  display: block;
  padding: 20px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: center;
  text-decoration: none;
  color: var(--text);
  transition: all 0.2s;
}
.partner-card:hover {
  border-color: var(--accent);
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  transform: translateY(-2px);
  text-decoration: none;
  opacity: 1;
}
.partner-card-short {
  font-family: 'Playfair Display', serif;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
}
.partner-card-full {
  font-size: 0.85rem;
  color: var(--muted);
}
@media (max-width: 900px) {
  .people-grid { grid-template-columns: repeat(3, 1fr); }
  .student-grid { grid-template-columns: repeat(4, 1fr); }
  .partner-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .people-grid { grid-template-columns: repeat(2, 1fr); }
  .student-grid { grid-template-columns: repeat(3, 1fr); }
  .partner-grid { grid-template-columns: 1fr; }
  .pi-card { flex-direction: column; text-align: center; }
}