:root {
  --bg: #d9d9d7;
  --surface: #ffffff;
  --panel-grad: linear-gradient(180deg, #f8f8f6 0%, #f1f1ee 100%);
  --panel-border: #c9daf7;
  --text: #182033;
  --muted: #516079;
  --accent: #1a3767;
  --accent-soft: #e6edf9;
  --border: #ced8ea;
  --shadow: 0 8px 30px rgba(14, 32, 64, 0.08);
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: "Source Sans Pro", "Segoe UI", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
}

.container {
  width: min(1040px, 92%);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 0 rgba(26, 55, 103, 0.06);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 0;
}

.brand {
  font-family: "Georgia", "Times New Roman", serif;
  font-size: 1.14rem;
  font-weight: 700;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: 0.2px;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.15rem;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
  padding: 0.4rem 0.62rem;
  border-radius: 0.35rem;
  border: 1px solid transparent;
}

.nav a:hover,
.nav a.active {
  color: var(--accent);
  border-color: var(--border);
  background: var(--accent-soft);
}

.theme-btn {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--accent);
  border-radius: 0.35rem;
  padding: 0.35rem 0.6rem;
  cursor: pointer;
  font-weight: 600;
}

main {
  padding: 2rem 0 3rem;
}

.hero {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 1.7rem;
  align-items: start;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 0.6rem;
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.hero img {
  width: 220px;
  height: 220px;
  border-radius: 0.5rem;
  object-fit: cover;
  border: 3px solid #f2f5fb;
  box-shadow: 0 10px 20px rgba(16, 39, 76, 0.14);
}

.profile-col {
  display: flex;
  flex-direction: column;
  align-items: center;
}

h1, h2, h3 {
  font-family: "Georgia", "Times New Roman", serif;
  color: var(--accent);
  margin: 0 0 0.7rem;
}

h1 {
  font-size: clamp(1.45rem, 2.2vw, 1.95rem);
}

h2 {
  font-size: 1.26rem;
}

p {
  margin: 0 0 1rem;
}

.subtitle {
  color: var(--muted);
  font-size: 1.03rem;
}

.title-block {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 0.45rem;
  padding: 0.9rem 1rem;
  margin-bottom: 0.9rem;
}

.title-block h1 {
  margin-bottom: 0.55rem;
}

.title-block .subtitle {
  margin-bottom: 0;
}

.title-divider {
  margin: 0.7rem 0 0.65rem;
}

.scholar-inline {
  display: inline-flex;
  align-items: center;
  justify-content: flex-start;
  text-decoration: none;
}

.scholar-logo-inline {
  width: 150px;
  max-width: 100%;
  height: auto;
  display: block;
}

.short-bio {
  border: 1px solid var(--border);
  background: var(--panel-grad);
  border-radius: 0.45rem;
  padding: 0.9rem 1rem;
  margin-top: 1rem;
  text-align: justify;
}

.research-interest {
  border: 1px solid var(--border);
  background: var(--panel-grad);
  border-radius: 0.45rem;
  padding: 0.75rem 0.9rem;
  margin: 0;
  flex: 1;
}

.research-row {
  display: flex;
  align-items: center;
  gap: 0.7rem;
}

.quick-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 0.85rem;
}

.btn {
  display: inline-block;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 0.5rem 0.82rem;
  border-radius: 0.3rem;
  border: 1px solid var(--border);
}

.btn-primary {
  color: #ffffff;
  background: var(--accent);
  border-color: var(--accent);
}

.btn-primary:hover,
.btn-primary:focus {
  color: var(--accent);
  background: #ffffff;
  border-color: var(--accent);
}

.btn-secondary {
  color: var(--accent);
  background: var(--surface);
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.9rem;
  margin-top: 1rem;
}

.pub-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0.4rem 0 1rem;
}

.pub-tab {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--accent);
  border-radius: 0.35rem;
  padding: 0.45rem 0.8rem;
  font-weight: 600;
  cursor: pointer;
}

.pub-tab.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #ffffff;
}

.pub-tab-panel {
  display: none;
  border: 1px solid var(--panel-border);
  border-radius: 0.45rem;
  background: var(--panel-grad);
  padding: 0.9rem 1rem;
}

.pub-tab-panel.active {
  display: block;
}

.teach-tab-panel {
  display: none;
}

.teach-tab-panel.active {
  display: block;
}

.card {
  background: var(--panel-grad);
  border: 1px solid var(--panel-border);
  border-top: 3px solid var(--accent);
  border-radius: 0.55rem;
  padding: 1.15rem;
  box-shadow: var(--shadow);
}

.current-focus-card {
  background: var(--panel-grad);
  border-color: var(--panel-border);
}

.open-project-card {
  background: var(--panel-grad);
  border-color: var(--panel-border);
}

.flat-top-card {
  border-top: 1px solid var(--panel-border);
}

.profile-card {
  padding: 20px;
  background: #ffffff;
  border-color: var(--border);
}

.profile-section {
  border: 1px solid var(--panel-border);
  border-radius: 0.45rem;
  background: #ffffff;
  padding: 0.9rem 1rem;
  margin-bottom: 1rem;
}

.profile-section:last-child {
  margin-bottom: 0;
}

ul {
  margin: 0 0 1rem 1.1rem;
  padding: 0;
}

li {
  margin-bottom: 0.4rem;
}

.section-line {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 0 0 0.95rem;
}

.site-footer {
  margin-top: 0.9rem;
  border-top: 1px solid var(--panel-border);
  background: rgba(255, 255, 255, 0.65);
  padding: 0.95rem 0 1.15rem;
  color: var(--muted);
  font-size: 0.94rem;
}

.site-footer .container {
  text-align: center;
}

.site-footer p {
  margin: 0;
}

.site-footer hr {
  border: 0;
  border-top: 1px solid var(--panel-border);
  margin: 0 0 0.55rem;
}

.footer-line {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 0 0 0.75rem;
}

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

.google-scholar img {
  height: 80px;
  width: auto;
  padding-top: 0;
}

.dark {
  --bg: #111827;
  --surface: #1a2333;
  --text: #ecf0f9;
  --muted: #c5cfdf;
  --accent: #b8cdf7;
  --accent-soft: #27344c;
  --border: #33435f;
  --shadow: none;
}

.dark .site-header {
  background: rgba(17, 24, 39, 0.96);
}

.dark .research-interest {
  background: #1d2638;
}

.dark .short-bio {
  background: linear-gradient(180deg, #1c273c 0%, #1a2336 100%);
}

@media (max-width: 860px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .hero img {
    width: 170px;
    height: 170px;
  }

  .grid-2 {
    grid-template-columns: 1fr;
  }

  .research-row {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav-wrap {
    align-items: flex-start;
    flex-direction: column;
  }

}

.page-student-style .card {
  background: var(--panel-grad);
  border-color: var(--panel-border);
}

.page-student-style .short-bio,
.page-student-style .pub-tab-panel,
.page-student-style .profile-section {
  background: #ffffff;
  border: 1px solid var(--panel-border);
}