:root {
  --bg: #f2f5fb;
  --panel: #ffffff;
  --panel-soft: #f8faff;
  --text: #1b2538;
  --muted: #5c6a82;
  --accent: #1f5fbf;
  --accent-soft: #e8f0ff;
  --border: #d8e0ef;
  --shadow: 0 10px 28px rgba(15, 42, 87, 0.08);
}

[data-theme="dark"] {
  --bg: #0f1624;
  --panel: #141f33;
  --panel-soft: #18263f;
  --text: #e9eefb;
  --muted: #a7b5d0;
  --accent: #73a8ff;
  --accent-soft: #1d2b47;
  --border: #2a3c5d;
  --shadow: 0 12px 28px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

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

body {
  font-family: "Inter", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  background: linear-gradient(180deg, var(--bg) 0%, var(--panel-soft) 100%);
  color: var(--text);
  line-height: 1.65;
}

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

a:hover {
  text-decoration: underline;
}

.site-nav {
  position: fixed;
  left: 0;
  right: 0;
  top: 0;
  z-index: 10;
  transition: all 0.25s ease;
  background: transparent;
}

.site-nav.scrolled {
  background: color-mix(in srgb, var(--panel) 88%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.nav-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.brand {
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 0.01em;
  color: var(--text);
}

.nav-links {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

.nav-links a,
.theme-toggle {
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 7px 12px;
  font-size: 0.92rem;
  color: var(--muted);
  background: transparent;
  cursor: pointer;
  transition: all 0.2s ease;
}

.nav-links a.active,
.nav-links a:hover,
.theme-toggle:hover {
  color: var(--text);
  background: var(--accent-soft);
  border-color: var(--border);
  text-decoration: none;
}

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 94px 20px 32px;
}

.grid {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 24px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.sidebar {
  padding: 20px;
  position: sticky;
  top: 96px;
  height: fit-content;
}

.avatar {
  width: 200px;
  height: 200px;
  display: block;
  margin: 0 auto 14px;
  border-radius: 18px;
  object-fit: cover;
  object-position: center;
  border: 1px solid var(--border);
}

.name {
  margin: 0;
  text-align: center;
  font-size: 1.8rem;
}

.role,
.affiliation {
  margin: 2px 0;
  text-align: center;
  color: var(--muted);
}

.link-list {
  margin-top: 16px;
  display: grid;
  gap: 8px;
}

.link-item {
  display: block;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--panel-soft);
  color: var(--text);
}

.content {
  padding: 22px;
}

.section {
  margin-bottom: 24px;
}

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

.section h2 {
  margin: 0 0 10px;
  font-size: 1.35rem;
}

.section p {
  margin: 0 0 10px;
  color: var(--muted);
}

.pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.pill {
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--panel-soft);
  color: var(--text);
  padding: 5px 10px;
  font-size: 0.88rem;
}

.paper {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px;
  background: var(--panel-soft);
}

.paper h3 {
  margin: 0 0 6px;
  font-size: 1.06rem;
}

.paper p {
  margin: 0 0 8px;
}

.footer {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px 24px;
  color: var(--muted);
  font-size: 0.88rem;
}

@media (max-width: 940px) {
  .grid {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
  }
}