:root {
  --site-max-width: 1180px;
  --site-border: #e5e7eb;
  --site-muted: #4b5563;
  --site-muted-2: #6b7280;
  --site-surface: #ffffff;
  --site-surface-alt: #f8fafc;
  --site-accent: #0366d6;
  --site-accent-dark: #024ea3;
  --site-shadow: 0 12px 36px rgba(15, 23, 42, 0.08);
  --site-radius: 18px;
  --topbar-height: 72px;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  background: #f6f8fb;
}

a {
  text-decoration: underline;
}

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

[id] {
  scroll-margin-top: calc(var(--topbar-height) + 20px);
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  z-index: 1000;
  padding: 0.65rem 0.9rem;
  background: #111827;
  color: #fff;
  border-radius: 10px;
  text-decoration: none;
}

.skip-link:focus {
  top: 1rem;
}

header.site-topbar {
  display: block;
  width: 100%;
  float: none;
  position: sticky;
  top: 0;
  left: auto;
  right: auto;
  bottom: auto;
  margin: 0;
  padding: 0;
  z-index: 30;
  backdrop-filter: blur(16px);
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid rgba(229, 231, 235, 0.95);
}

.topbar-inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  justify-content: space-between;
  width: min(var(--site-max-width), calc(100% - 2rem));
  min-height: var(--topbar-height);
  margin: 0 auto;
}

.brand {
  display: inline-flex;
  align-items: center;
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.01em;
  text-decoration: none;
  color: #111827;
}

.brand:hover {
  color: #111827;
}

.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0.55rem 0.95rem;
  border: 1px solid var(--site-border);
  border-radius: 999px;
  background: #fff;
  color: #111827;
  font-weight: 600;
  cursor: pointer;
}

.site-nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  color: #111827;
}

.nav-link:hover {
  color: var(--site-accent);
}

.site-shell {
  display: grid;
  grid-template-areas: "sidebar content";
  grid-template-columns: minmax(280px, 340px) minmax(0, 1fr);
  gap: 2rem;
  width: min(var(--site-max-width), calc(100% - 2rem));
  margin: 1.75rem auto 3rem;
  align-items: start;
}

.site-sidebar {
  grid-area: sidebar;
}

.page-subpage .site-sidebar {
  position: sticky;
  top: calc(var(--topbar-height) + 1.25rem);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-height: calc(100vh - var(--topbar-height) - 2.5rem);
}

.site-content {
  grid-area: content;
  min-width: 0;
  padding: 2rem 2.25rem;
  background: var(--site-surface);
  border: 1px solid var(--site-border);
  border-radius: var(--site-radius);
  box-shadow: var(--site-shadow);
}

.page-home .site-content {
  display: grid;
  gap: 1.2rem;
  padding: 0;
  background: transparent;
  border: 0;
  box-shadow: none;
}

.page-home .site-sidebar {
  display: grid;
  gap: 1rem;
  align-content: start;
}

.page-home .profile-card {
  position: static;
}

.page-subpage .profile-card {
  position: static;
  top: auto;
}

.mobile-home-profile {
  display: none;
}

.profile-card {
  position: sticky;
  top: calc(var(--topbar-height) + 1.25rem);
  padding: 1.5rem;
  background: var(--site-surface);
  border: 1px solid var(--site-border);
  border-radius: var(--site-radius);
  box-shadow: var(--site-shadow);
}

.profile-image-wrap {
  margin-bottom: 1rem;
  overflow: hidden;
  border-radius: 24px;
  border: 1px solid var(--site-border);
}

.profile-image-wrap.is-hidden {
  display: none;
}

.profile-image {
  display: block;
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.profile-name {
  margin: 0;
  font-size: 1.65rem;
  line-height: 1.15;
  font-weight: 700;
}

.profile-name a {
  text-decoration: none;
  color: #111827;
}

.profile-name a:hover {
  color: #111827;
}

.profile-description {
  margin: 0.8rem 0 0;
  color: var(--site-muted);
}

.sidebar-links {
  display: grid;
  gap: 0.7rem;
  list-style: none;
  padding: 0;
  margin: 1.25rem 0 0;
}

.sidebar-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: #111827;
  text-decoration: none;
}

.sidebar-links a:hover {
  color: var(--site-accent);
}

.sidebar-links i {
  width: 1rem;
  text-align: center;
  color: var(--site-muted);
}

.sidebar-box {
  padding: 1.3rem 1.35rem;
  background: var(--site-surface);
  border: 1px solid var(--site-border);
  border-radius: var(--site-radius);
  box-shadow: var(--site-shadow);
}

.sidebar-box h2 {
  margin: 0 0 0.9rem;
  font-size: 1rem;
}

.keyword-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.keyword-list li {
  padding: 0.45rem 0.75rem;
  border: 1px solid var(--site-border);
  border-radius: 999px;
  background: var(--site-surface-alt);
  color: #111827;
  font-size: 0.88rem;
  line-height: 1.35;
}

.skills-list {
  display: grid;
  gap: 0.9rem;
  margin: 0;
}

.skills-list div {
  display: grid;
  gap: 0.25rem;
}

.skills-list dt {
  font-weight: 700;
  color: #111827;
}

.skills-list dd {
  margin: 0;
  color: var(--site-muted);
  font-size: 0.94rem;
  line-height: 1.55;
}

footer.site-footer {
  display: block;
  width: auto;
  float: none;
  position: static;
  bottom: auto;
  margin-top: 1rem;
  padding: 0 0.5rem;
  color: var(--site-muted-2);
  font-size: 0.88rem;
}

.page-subpage footer.site-footer {
  margin-top: auto;
}

footer.site-footer p {
  margin: 0.25rem 0;
}

.site-content > :first-child {
  margin-top: 0;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 1.25rem;
  font-weight: 600;
  text-decoration: none;
}

.hero {
  margin-bottom: 2.5rem;
}

.home-card {
  padding: 1.6rem 1.75rem;
  background: var(--site-surface);
  border: 1px solid var(--site-border);
  border-radius: var(--site-radius);
  box-shadow: var(--site-shadow);
}

.page-home .site-content > section.home-card {
  width: auto;
  float: none;
}

.home-card h2 {
  margin-top: 0;
  margin-bottom: 0.85rem;
  color: #111827;
}

.home-card p:last-child,
.home-card ul:last-child {
  margin-bottom: 0;
}

.hero-card {
  padding: 2rem 2.1rem;
}

.hero-card .hero {
  margin-bottom: 0;
}

.hero-kicker {
  display: inline-block;
  margin: 0 0 0.8rem;
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--site-accent);
}

.hero h1 {
  margin: 0;
  font-size: clamp(2rem, 4.2vw, 3.4rem);
  line-height: 1.06;
  color: #111827;
}

.hero-lead {
  max-width: 54rem;
  margin: 1rem 0 0;
  font-size: 1.08rem;
  line-height: 1.75;
  color: var(--site-muted);
}

.interest-list,
.publication-list,
.membership-list,
.conference-list,
.award-list {
  margin: 0;
  padding-left: 1.2rem;
}

.interest-list li,
.publication-list li,
.membership-list li,
.conference-list li,
.award-list li {
  margin-bottom: 0.8rem;
  color: var(--site-muted);
  line-height: 1.65;
}

.interest-list li:last-child,
.publication-list li:last-child,
.membership-list li:last-child,
.conference-list li:last-child,
.award-list li:last-child {
  margin-bottom: 0;
}

.entry-list {
  display: grid;
  gap: 1rem;
}

.entry {
  padding-top: 1rem;
  border-top: 1px solid var(--site-border);
}

.entry:first-child {
  padding-top: 0;
  border-top: 0;
}

.entry h3 {
  margin: 0;
  font-size: 1.06rem;
  line-height: 1.35;
}

.entry-meta {
  margin: 0.35rem 0 0.5rem;
  color: var(--site-muted-2);
  font-size: 0.92rem;
  font-weight: 600;
}

.entry p {
  margin: 0;
  color: var(--site-muted);
  line-height: 1.65;
}

.entry-note {
  margin-top: 0.55rem;
  font-size: 0.95rem;
  color: var(--site-muted);
}

.publication-list strong,
.award-list strong,
.conference-list strong {
  color: #111827;
}

.section-eyebrow {
  display: inline-block;
  margin-bottom: 0.7rem;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--site-accent);
}

.section-eyebrow i,
.hero-kicker i {
  margin-right: 0.35em;
  font-size: 0.9em;
  opacity: 0.85;
}

.hero-actions,
.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.35rem;
}

.button {
  display: inline-flex;
  box-sizing: border-box;
  align-items: center;
  justify-content: center;
  max-width: 100%;
  min-width: 0;
  padding: 0.8rem 1.15rem;
  border: 1px solid transparent;
  border-radius: 999px;
  background: var(--site-accent);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
  text-align: center;
}

.button:hover {
  color: #fff;
  background: var(--site-accent-dark);
}

.button-secondary {
  border-color: var(--site-border);
  background: #fff;
  color: #111827;
}

.button-secondary:hover {
  color: var(--site-accent-dark);
  background: var(--site-surface-alt);
}

.section-intro {
  color: var(--site-muted);
}

.contact-card {
  margin-top: 1rem;
  padding: 1.2rem 1.25rem;
  border: 1px solid var(--site-border);
  border-radius: 14px;
  background: var(--site-surface-alt);
}

.contact-card p:last-child {
  margin-bottom: 0;
}

@media print, screen and (max-width: 960px) {
  .topbar-inner {
    position: relative;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: calc(100% - 1px);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.9rem;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.98);
    border: 1px solid var(--site-border);
    border-top: 0;
    border-radius: 0 0 16px 16px;
    box-shadow: var(--site-shadow);
  }

  body.nav-open .site-nav {
    display: flex;
  }

  .site-shell {
    grid-template-areas:
      "content"
      "sidebar";
    grid-template-columns: minmax(0, 1fr);
    gap: 1.25rem;
    width: min(760px, calc(100% - 1.5rem));
    margin: 1rem auto 2rem;
  }

  .site-content {
    padding: 1.5rem;
  }

  .profile-card {
    position: static;
  }

  .page-subpage .site-sidebar {
    position: static;
    max-height: none;
  }

  .page-home .site-content {
    padding: 0;
  }

  .page-home .mobile-home-profile {
    display: block;
  }

  .page-home .site-sidebar > .profile-card {
    display: none;
  }
}

@media print, screen and (max-width: 640px) {
  .topbar-inner {
    width: min(var(--site-max-width), calc(100% - 1rem));
  }

  .site-content {
    padding: 1.15rem;
    border-radius: 14px;
  }

  .profile-card {
    padding: 1.15rem;
    border-radius: 14px;
  }

  .sidebar-box,
  .home-card,
  .hero-card {
    padding: 1.15rem;
    border-radius: 14px;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero-lead {
    font-size: 1rem;
    line-height: 1.65;
  }

  .button,
  .button-secondary {
    width: 100%;
    overflow-wrap: anywhere;
    white-space: normal;
  }

  .hero-actions,
  .contact-links {
    flex-direction: column;
    align-items: stretch;
  }
}