:root {
  --bg: #000000;
  --ink: #f4f4f4;
  --muted: #c8c8c8;
  --line: #2c2c2c;
  --accent: #86d1be;
  --paper: #090909;
  --education: #f8e9b5;
  --serif: Georgia, "Times New Roman", serif;
  --sans: "Avenir Next", "Segoe UI", sans-serif;
}

:root[data-theme="light"] {
  --bg: #f7f5ef;
  --ink: #20242a;
  --muted: #626b76;
  --line: #ded8ca;
  --accent: #0b5c4a;
  --paper: #fffdf8;
  --education: #73777d;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: var(--sans);
  line-height: 1.65;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.site-shell {
  max-width: 860px;
  margin: 0 auto;
  padding: 48px 24px;
}

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 32px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.site-title {
  color: var(--ink);
  font-family: var(--serif);
  font-size: 26px;
  font-weight: 700;
}

.theme-toggle {
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink);
  border-radius: 999px;
  padding: 8px 14px;
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

.theme-toggle:hover {
  text-decoration: none;
  opacity: 0.92;
}

.theme-toggle .theme-toggle-light {
  display: none;
}

.theme-toggle[data-theme="light"] .theme-toggle-dark {
  display: none;
}

.theme-toggle[data-theme="light"] .theme-toggle-light {
  display: inline;
}

.page-content {
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 34px;
}

.profile {
  display: grid;
  grid-template-columns: 170px 1fr;
  gap: 28px;
  align-items: start;
  margin-bottom: 36px;
}

.profile-photo {
  width: 170px;
  height: 170px;
  object-fit: cover;
  border-radius: 6px;
  border: 1px solid var(--line);
}

h1,
h2 {
  font-family: var(--serif);
  line-height: 1.2;
}

h1 {
  margin: 0 0 6px;
  font-size: 36px;
}

h2 {
  margin: 34px 0 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--line);
  font-size: 22px;
}

.subtitle {
  margin: 0 0 14px;
  color: var(--muted);
}

.bio {
  margin: 0 0 14px;
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 0;
  font-weight: 600;
}

.paper-links {
  display: inline-flex;
  gap: 10px;
  margin-left: 8px;
  font-size: 14px;
  font-weight: 600;
}

.talk-links {
  display: inline-flex;
  gap: 10px;
  margin-left: 8px;
  font-size: 14px;
  font-weight: 600;
}

.paper-links span {
  color: var(--muted);
}

ul,
ol {
  margin: 0;
  padding-left: 22px;
}

li {
  margin: 8px 0;
}

.education-experience,
.education-experience strong {
  color: var(--education);
}

.education-experience a {
  color: inherit;
}

.paper-list li {
  margin-bottom: 16px;
}

em {
  color: var(--muted);
}

.site-footer {
  margin-top: 24px;
  color: var(--muted);
  font-size: 14px;
  text-align: center;
}

.visitor-panel {
  margin-bottom: 24px;
  padding-top: 8px;
  text-align: left;
}

.visitor-panel h2 {
  margin-top: 0;
}

.visitor-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 16px;
}

.visitor-card {
  border: 1px solid var(--line);
  background: var(--paper);
  padding: 16px;
}

.visitor-label {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
}

.visitor-metric {
  margin: 8px 0;
  color: var(--ink);
  font-size: 18px;
  font-weight: 700;
}

.visitor-map {
  min-height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.visitor-note {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

@media (max-width: 680px) {
  .site-shell {
    padding: 24px 14px;
  }

  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .page-content {
    padding: 22px;
  }

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

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

  .profile-photo {
    width: 150px;
    height: 150px;
  }
}