/*
  Academic Website Starter
  Clean, responsive, dependency-light styling for academic personal sites.
*/

:root {
  color-scheme: light;
  --bg: #ffffff;
  --sidebar: #f6f7f9;
  --surface: #ffffff;
  --surface-soft: #f3f5f7;
  --surface-strong: #eceff2;
  --text: #17191c;
  --muted: #68727d;
  --border: #e1e5e9;
  --border-strong: #c9d0d7;
  --accent: #1d5f8a;
  --accent-hover: #154866;
  --accent-soft: #edf5fa;
  --focus: #2d6e9b;
  --shadow: 0 14px 36px rgba(20, 24, 30, 0.08);
  --sidebar-width: 196px;
  --content-width: 1040px;
  --page-width: 900px;
}

html.dark {
  color-scheme: dark;
  --bg: #1b1e22;
  --sidebar: #20242a;
  --surface: #24282e;
  --surface-soft: #2b3037;
  --surface-strong: #323840;
  --text: #f3f5f7;
  --muted: #aeb7c1;
  --border: #39414a;
  --border-strong: #515b66;
  --accent: #8cc7ef;
  --accent-hover: #b7ddf8;
  --accent-soft: #263847;
  --focus: #9bcff2;
  --shadow: 0 18px 44px rgba(0, 0, 0, 0.24);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background: var(--bg);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
body.search-open { overflow: hidden; }
a { color: inherit; }
button, input, textarea, select { font: inherit; }
button { cursor: pointer; }
img { max-width: 100%; }
svg {
  display: block;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

::selection { background: var(--accent-soft); }
:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  left: 1rem;
  top: 1rem;
  z-index: 300;
  padding: 0.65rem 0.9rem;
  border-radius: 0.5rem;
  background: var(--text);
  color: var(--bg);
  font-weight: 700;
  text-decoration: none;
  transform: translateY(-180%);
  transition: transform 140ms ease;
}
.skip-link:focus { transform: translateY(0); }

/* Layout ------------------------------------------------------- */
.site-layout {
  min-height: 100vh;
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
}
.site-sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  border-right: 1px solid var(--border);
  background: var(--sidebar);
}
.sidebar-inner {
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 2rem 0.78rem 1rem;
}
.site-brand {
  display: block;
  margin: 0 0.72rem 2rem;
  overflow-wrap: anywhere;
  color: var(--text);
  font-size: 1.02rem;
  font-weight: 760;
  line-height: 1.35;
  letter-spacing: -0.015em;
  text-decoration: none;
}
.site-brand:hover { color: var(--accent-hover); }

.desktop-nav {
  display: grid;
  gap: 0.18rem;
}
.nav-link {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 2.58rem;
  padding: 0.53rem 0.72rem;
  color: var(--muted);
  border-radius: 0.48rem;
  font-size: 0.93rem;
  font-weight: 630;
  text-decoration: none;
  transition: color 140ms ease, background 140ms ease;
}
.nav-link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.63rem;
  bottom: 0.63rem;
  width: 2px;
  border-radius: 99px;
  background: var(--accent);
  opacity: 0;
  transform: scaleY(0.5);
  transition: opacity 140ms ease, transform 140ms ease;
}
.nav-link:hover {
  color: var(--text);
  background: var(--surface-soft);
}
.nav-link.active {
  color: var(--accent);
  background: var(--surface);
}
.nav-link.active::before {
  opacity: 1;
  transform: scaleY(1);
}
html.dark .nav-link.active {
  color: var(--accent-hover);
  background: var(--surface-soft);
}
.external-mark {
  color: var(--muted);
  font-size: 0.77rem;
  font-weight: 500;
}

.sidebar-utilities {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding-left: 0.62rem;
}
.utility-button,
.icon-button {
  width: 2.35rem;
  height: 2.35rem;
  display: inline-grid;
  place-items: center;
  padding: 0;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 0.55rem;
  background: transparent;
  transition: color 140ms ease, border-color 140ms ease, background 140ms ease, transform 140ms ease;
}
.utility-button:hover,
.icon-button:hover {
  color: var(--text);
  border-color: var(--border-strong);
  background: var(--surface-soft);
}
.utility-button:active,
.icon-button:active { transform: translateY(1px); }
.utility-button svg,
.icon-button svg,
.theme-icon,
.menu-icon,
.close-icon {
  width: 1.08rem;
  height: 1.08rem;
}
.theme-icon.sun-icon { display: none; }
html.dark .theme-icon.moon-icon { display: none; }
html.dark .theme-icon.sun-icon { display: block; }

.site-content-column {
  min-width: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
.mobile-header,
.mobile-nav { display: none; }
.site-main {
  flex: 1;
  width: 100%;
}
.content-shell,
.footer-inner {
  width: min(calc(100% - 4rem), var(--content-width));
  margin-inline: auto;
}
.content-shell { padding: 4.25rem 0; }
.home-shell { padding-top: 4.8rem; }
.page-shell { max-width: var(--page-width); }

/* Homepage ----------------------------------------------------- */
.profile-hero {
  display: grid;
  grid-template-columns: 188px minmax(0, 1fr);
  align-items: center;
  gap: 3.7rem;
  padding: 0 0 3.55rem;
  border-bottom: 1px solid var(--border);
}
.portrait-column {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.profile-avatar {
  width: 168px;
  height: 168px;
  object-fit: cover;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  box-shadow: var(--shadow);
}
.profile-avatar--circle { border-radius: 50%; }
.profile-avatar--square { border-radius: 0.78rem; }
.social-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.45rem;
  margin-top: 1rem;
}
.social-link {
  width: 2.22rem;
  height: 2.22rem;
  display: inline-grid;
  place-items: center;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 0.48rem;
  background: transparent;
  text-decoration: none;
  transition: transform 140ms ease, color 140ms ease, border-color 140ms ease, background 140ms ease;
}
.social-link svg {
  width: 1.02rem;
  height: 1.02rem;
  fill: currentColor;
  stroke: none;
}
.social-link.social-stroke-link svg {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
}
.social-text-link {
  font-size: 0.8rem;
  font-weight: 800;
}
.social-link:hover {
  transform: translateY(-1px);
  color: var(--accent-hover);
  border-color: var(--border-strong);
  background: var(--surface-soft);
}

.profile-copy h1,
.page-heading-wrap h1 {
  margin: 0;
  color: var(--text);
  font-size: clamp(2.45rem, 5vw, 3.62rem);
  line-height: 1.04;
  font-weight: 790;
  letter-spacing: -0.045em;
}
.profile-role {
  margin: 1rem 0 0;
  color: var(--text);
  font-size: 1.14rem;
  font-weight: 660;
}
.profile-institution,
.profile-department {
  margin: 0.12rem 0 0;
  color: var(--muted);
  font-size: 1rem;
}
.profile-department { font-size: 0.94rem; }
.profile-meta {
  display: grid;
  gap: 0.38rem;
  margin-top: 1.35rem;
  color: var(--muted);
  font-size: 0.95rem;
}
.profile-meta p {
  display: flex;
  align-items: center;
  gap: 0.58rem;
  margin: 0;
}
.profile-meta svg {
  flex: 0 0 auto;
  width: 0.98rem;
  height: 0.98rem;
}
.profile-meta a {
  color: var(--accent);
  font-weight: 600;
  text-decoration: none;
}
.profile-meta a:hover {
  color: var(--accent-hover);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.site-footer {
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.82rem;
}

.footer-inner {
  width: 100%;
  padding: 1.15rem 1rem;
  text-align: center;
}

.footer-link {
  color: var(--accent);
  font-weight: 500;
  text-decoration: none;
  text-underline-offset: 0.16em;
  transition:
    color 140ms ease,
    text-decoration-color 140ms ease;
}

.footer-link:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

.home-section {
  padding: 2.65rem 0;
  border-bottom: 1px solid var(--border);
}
.home-section:last-child {
  padding-bottom: 0.6rem;
  border-bottom: 0;
}
.section-heading {
  margin: 0 0 1.15rem;
  color: var(--text);
  font-size: 1.37rem;
  line-height: 1.3;
  font-weight: 750;
  letter-spacing: -0.02em;
}
.education-list { margin-top: 1.15rem !important; }
.interest-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.interest-list li {
  margin: 0;
  padding: 0.4rem 0.7rem;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface-soft);
  font-size: 0.89rem;
  font-weight: 590;
}
.section-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 1rem;
  color: var(--accent);
  font-size: 0.92rem;
  font-weight: 680;
  text-decoration: none;
}
.section-link:hover { color: var(--accent-hover); }

/* Content pages ------------------------------------------------ */
.page-heading-wrap {
  margin-bottom: 2rem;
  padding-bottom: 1.45rem;
  border-bottom: 1px solid var(--border);
}
.page-heading-wrap h1 { font-size: clamp(2.25rem, 5vw, 3.2rem); }
.page-kicker {
  margin: 0 0 0.45rem;
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}
.page-description {
  max-width: 46rem;
  margin: 0.65rem 0 0;
  color: var(--muted);
  font-size: 1.02rem;
}

.page-layout.has-toc {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 210px;
  gap: 3rem;
  width: min(calc(100% - 4rem), var(--content-width));
  margin-inline: auto;
  padding: 4.25rem 0;
}
.page-layout.has-toc .page-shell {
  width: 100%;
  max-width: var(--page-width);
  margin: 0;
  padding: 0;
}
.page-toc {
  position: sticky;
  top: 2rem;
  align-self: start;
  padding-left: 1rem;
  border-left: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.83rem;
}
.page-toc-title {
  margin: 0 0 0.55rem;
  color: var(--text);
  font-size: 0.78rem;
  font-weight: 760;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.page-toc nav > ul { margin: 0; padding: 0; list-style: none; }
.page-toc ul ul { margin: 0.25rem 0 0.25rem 0.8rem; padding: 0; list-style: none; }
.page-toc li { margin: 0.22rem 0; }
.page-toc a { color: var(--muted); text-decoration: none; }
.page-toc a:hover { color: var(--accent-hover); }

.academic-content {
  color: var(--text);
  font-size: 1.01rem;
}
.academic-content > :first-child { margin-top: 0; }
.academic-content > :last-child { margin-bottom: 0; }
.academic-content p { margin: 0 0 1.05rem; }
.academic-content h2,
.academic-content h3,
.academic-content h4 {
  color: var(--text);
  line-height: 1.3;
  font-weight: 740;
  letter-spacing: -0.015em;
  scroll-margin-top: 1.5rem;
}
.academic-content h2 {
  margin: 2.2rem 0 0.85rem;
  font-size: 1.43rem;
}
.academic-content h3 {
  margin: 1.7rem 0 0.72rem;
  font-size: 1.16rem;
}
.academic-content ul,
.academic-content ol {
  margin: 0.75rem 0 1.25rem 1.35rem;
  padding: 0;
}
.academic-content li {
  margin: 0.34rem 0;
  padding-left: 0.15rem;
}
.academic-content a,
.read-more,
.back-link {
  color: var(--accent);
  font-weight: 580;
  text-decoration-color: currentColor;
  text-decoration-thickness: 1.35px;
  text-underline-offset: 0.19em;
}
.academic-content a:hover,
.read-more:hover,
.back-link:hover { color: var(--accent-hover); }
.academic-content blockquote {
  margin: 1.5rem 0;
  padding: 0.15rem 0 0.15rem 1rem;
  color: var(--muted);
  border-left: 2px solid var(--border-strong);
}
.academic-content code {
  padding: 0.12rem 0.32rem;
  border-radius: 0.28rem;
  background: var(--surface-soft);
  font-size: 0.92em;
}
.academic-content pre {
  overflow-x: auto;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 0.65rem;
  background: var(--surface-soft);
}
.academic-content pre code { padding: 0; background: transparent; }
.academic-content table {
  width: 100%;
  margin: 1.3rem 0;
  border-collapse: collapse;
}
.academic-content th,
.academic-content td {
  padding: 0.65rem 0.7rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}
.academic-content hr {
  margin: 2rem 0;
  border: 0;
  border-top: 1px solid var(--border);
}
.academic-content figure {
  margin: 1.8rem 0;
}
.academic-content figure img {
  display: block;
  height: auto;
  margin-inline: auto;
  border-radius: 0.55rem;
}
.academic-content figcaption {
  margin-top: 0.6rem;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.5;
  text-align: center;
}
.footnotes {
  margin-top: 2.4rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.88rem;
}
.footnotes hr { display: none; }

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-bottom: 1.5rem;
  font-weight: 650;
  text-decoration: none;
}

/* List pages --------------------------------------------------- */
.entry-list {
  display: grid;
  gap: 0.9rem;
  margin-top: 2rem;
}
.entry-card {
  padding: 1.3rem 1.4rem;
  border: 1px solid var(--border);
  border-radius: 0.7rem;
  background: var(--surface);
  transition: border-color 140ms ease, box-shadow 140ms ease, transform 140ms ease;
}
.entry-card:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow);
  transform: translateY(-1px);
}
.entry-card h2 {
  margin: 0 0 0.55rem;
  font-size: 1.24rem;
  font-weight: 730;
}
.entry-card h2 a { text-decoration: none; }
.entry-summary { color: var(--muted); }
.read-more {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-weight: 650;
}

/* Publications ------------------------------------------------ */
.publication-list {
  display: grid;
  gap: 0;
  margin: 0;
}
.publication-item {
  display: grid;
  grid-template-columns: 4.4rem minmax(0, 1fr);
  gap: 1.15rem;
  padding: 1.35rem 0;
  border-bottom: 1px solid var(--border);
}
.publication-item:first-child { padding-top: 0.2rem; }
.publication-item:last-child { border-bottom: 0; }
.publication-year {
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 720;
  font-variant-numeric: tabular-nums;
}
.publication-title {
  margin: 0;
  color: var(--text);
  font-size: 1.02rem;
  font-weight: 730;
  line-height: 1.4;
}
.publication-authors,
.publication-venue,
.publication-abstract {
  margin: 0.2rem 0 0;
  color: var(--muted);
  font-size: 0.91rem;
  line-height: 1.55;
}
.publication-venue { font-style: italic; }
.publication-abstract { margin-top: 0.5rem; }
.publication-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 0.58rem;
}
.publication-links a,
.pub-bibtex summary {
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 700;
  text-decoration: none;
}
.publication-links a:hover,
.pub-bibtex summary:hover { color: var(--accent-hover); }
.pub-bibtex { display: inline-block; }
.pub-bibtex summary { cursor: pointer; list-style: none; }
.pub-bibtex summary::-webkit-details-marker { display: none; }
.pub-bibtex[open] { display: block; width: 100%; margin-top: 0.45rem; }
.pub-bibtex pre {
  overflow-x: auto;
  margin: 0.55rem 0 0;
  padding: 0.8rem;
  border: 1px solid var(--border);
  border-radius: 0.55rem;
  background: var(--surface-soft);
  color: var(--text);
  font-size: 0.78rem;
  line-height: 1.5;
}
.selected-mark {
  display: inline-block;
  margin-left: 0.45rem;
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 780;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

/* Search ------------------------------------------------------- */
.search-dialog {
  position: fixed;
  inset: 0;
  z-index: 250;
}
.search-dialog[hidden] { display: none; }
.search-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 18, 22, 0.44);
  backdrop-filter: blur(4px);
}
.search-panel {
  position: relative;
  width: min(calc(100% - 2rem), 650px);
  max-height: min(78vh, 720px);
  overflow: auto;
  margin: 9vh auto 0;
  padding: 1.2rem;
  border: 1px solid var(--border);
  border-radius: 0.9rem;
  background: var(--surface);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.22);
}
.search-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.9rem;
}
.eyebrow {
  margin: 0 0 0.12rem;
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}
.search-heading h2 {
  margin: 0;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
}
.search-input-wrap {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.65rem;
  padding: 0.7rem 0.78rem;
  border: 1px solid var(--border-strong);
  border-radius: 0.62rem;
  background: var(--bg);
}
.search-input-wrap svg {
  width: 1.05rem;
  height: 1.05rem;
  color: var(--muted);
}
.search-input-wrap input {
  width: 100%;
  min-width: 0;
  padding: 0;
  color: var(--text);
  border: 0;
  outline: 0;
  background: transparent;
}
.search-input-wrap input::placeholder { color: var(--muted); }
kbd {
  padding: 0.12rem 0.38rem;
  color: var(--muted);
  border: 1px solid var(--border);
  border-bottom-color: var(--border-strong);
  border-radius: 0.3rem;
  background: var(--surface-soft);
  font-size: 0.7rem;
}
.search-results {
  display: grid;
  gap: 0.45rem;
  margin-top: 0.9rem;
}
.search-result {
  display: block;
  padding: 0.78rem 0.85rem;
  border: 1px solid transparent;
  border-radius: 0.58rem;
  text-decoration: none;
}
.search-result:hover {
  border-color: var(--border);
  background: var(--surface-soft);
}
.search-result strong {
  display: block;
  color: var(--text);
  font-size: 0.95rem;
}
.search-result p {
  margin: 0.18rem 0 0;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.45;
}
.search-empty {
  margin: 0;
  padding: 1rem 0.25rem;
  color: var(--muted);
  font-size: 0.9rem;
}

/* Attribution, footer, back-to-top ---------------------------- */
.home-attribution {
  width: 100%;
  margin: 0;
  padding: 0;
  color: var(--muted);
  font-size: 0.74rem;
  line-height: 1.35;
  text-align: right;
}
.home-attribution a {
  color: var(--accent);
  font-weight: 650;
  text-decoration: none;
}
.home-attribution a:hover {
  color: var(--accent-hover);
  text-decoration: underline;
  text-underline-offset: 0.16em;
}
.site-footer {
  color: var(--muted);
  border-top: 1px solid var(--border);
  font-size: 0.84rem;
}
.footer-inner {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}
.back-to-top {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: 90;
  width: 2.45rem;
  height: 2.45rem;
  display: grid;
  place-items: center;
  margin: 0;
  padding: 0;
  color: var(--muted);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 0.58rem;
  box-shadow: 0 6px 20px rgba(20, 25, 30, 0.10);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(0.35rem);
  transition: opacity 160ms ease, visibility 160ms ease, transform 160ms ease, color 140ms ease, border-color 140ms ease, background 140ms ease;
}
html.dark .back-to-top { box-shadow: 0 8px 24px rgba(0, 0, 0, 0.22); }
.back-to-top:hover {
  color: var(--accent);
  border-color: var(--border-strong);
  background: var(--surface-soft);
}
.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
}
.back-to-top svg { width: 1rem; height: 1rem; stroke-width: 2; }

.menu-toggle .close-icon { display: none; }
.menu-toggle.open .menu-icon { display: none; }
.menu-toggle.open .close-icon { display: block; }

/* Responsive --------------------------------------------------- */
@media (max-width: 1120px) {
  .page-layout.has-toc {
    display: block;
    width: min(calc(100% - 4rem), var(--content-width));
  }
  .page-layout.has-toc .page-shell { margin-inline: auto; }
  .page-toc {
    position: static;
    max-width: var(--page-width);
    margin: 0 auto 2rem;
    padding: 0.9rem 1rem;
    border: 1px solid var(--border);
    border-radius: 0.6rem;
    background: var(--surface-soft);
  }
}

@media (max-width: 900px) {
  .site-layout { display: block; }
  .site-sidebar { display: none; }
  .mobile-header {
    position: sticky;
    top: 0;
    z-index: 80;
    min-height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0 1.2rem;
    border-bottom: 1px solid var(--border);
    background: color-mix(in srgb, var(--bg) 94%, transparent);
    backdrop-filter: blur(12px);
  }
  .mobile-brand {
    max-width: calc(100vw - 10rem);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: var(--text);
    font-size: 0.98rem;
    font-weight: 760;
    letter-spacing: -0.01em;
    text-decoration: none;
  }
  .mobile-actions {
    display: flex;
    align-items: center;
    gap: 0.42rem;
  }
  .mobile-nav {
    position: sticky;
    top: 64px;
    z-index: 70;
    display: block;
    border-bottom: 1px solid var(--border);
    background: var(--bg);
    box-shadow: var(--shadow);
  }
  .mobile-nav[hidden] { display: none; }
  .mobile-nav-inner {
    width: min(calc(100% - 2.5rem), var(--content-width));
    margin-inline: auto;
    padding: 0.5rem 0 0.75rem;
  }
  .mobile-nav-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.72rem 0.2rem;
    color: var(--muted);
    border-bottom: 1px solid var(--border);
    font-size: 0.94rem;
    font-weight: 630;
    text-decoration: none;
  }
  .mobile-nav-link:last-child { border-bottom: 0; }
  .mobile-nav-link:hover,
  .mobile-nav-link.active { color: var(--accent-hover); }

  .content-shell,
  .footer-inner,
  .page-layout.has-toc {
    width: min(calc(100% - 2.5rem), var(--content-width));
  }
  .content-shell { padding: 3.5rem 0; }
  .home-shell { padding-top: 3.9rem; }
  .page-layout.has-toc { padding: 3.5rem 0; }
  .back-to-top { right: 1rem; bottom: 1rem; }
}

@media (max-width: 680px) {
  .content-shell,
  .footer-inner,
  .mobile-nav-inner,
  .page-layout.has-toc {
    width: min(calc(100% - 2rem), var(--content-width));
  }
  .mobile-header { padding-inline: 1rem; }
  .content-shell,
  .page-layout.has-toc { padding: 2.8rem 0; }
  .home-shell { padding-top: 3rem; }

  .profile-hero {
    grid-template-columns: 1fr;
    gap: 2rem;
    padding-bottom: 2.8rem;
    text-align: center;
  }
  .profile-avatar { width: 148px; height: 148px; }
  .profile-copy h1 { font-size: clamp(2.35rem, 12vw, 3.25rem); }
  .profile-meta p { justify-content: center; }
  .home-section { padding: 2.2rem 0; }
  .interest-list { justify-content: center; }

  .publication-item {
    grid-template-columns: 1fr;
    gap: 0.22rem;
  }
  .publication-year { font-size: 0.8rem; }

  .home-attribution { font-size: 0.71rem; }
  .footer-inner { min-height: 62px; }
  .back-to-top { right: 0.85rem; bottom: 0.85rem; width: 2.3rem; height: 2.3rem; }

  .search-panel {
    width: calc(100% - 1rem);
    margin-top: 1rem;
    max-height: calc(100vh - 2rem);
  }
}

@media print {
  .site-sidebar,
  .mobile-header,
  .mobile-nav,
  .sidebar-utilities,
  .back-to-top,
  .home-attribution,
  .site-footer,
  .page-toc,
  .social-links { display: none !important; }
  .site-layout { display: block; }
  .content-shell,
  .page-layout.has-toc,
  .page-layout.has-toc .page-shell {
    width: 100%;
    max-width: none;
    padding: 0;
    margin: 0;
  }
  body { color: #000; background: #fff; }
  a { color: #000 !important; text-decoration: underline; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}