:root {
  --text: #111827;
  --muted: #6b7280;
  --line: #e5e7eb;
  --link: #1f4f78;
  --bg: #ffffff;
  --max-width: 1120px;

  --accent: #1f4f78;
  --accent-soft: #5f8ea8;
  --accent-light: #eef5fb;
  --highlight: #d9bf3b;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.7 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

a:hover {
  text-decoration: underline;
}

/* Layout */

.site {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 300px 1fr;
  min-height: 100vh;
}

/* Sidebar */

.sidebar {
  padding: 42px 28px;
  border-right: 1px solid var(--line);
  background: transparent;
}

.avatar {
  width: 110px;
  height: 110px;
  border-radius: 50%;
  object-fit: cover;
  display: block;
  margin-bottom: 24px;
}

.sidebar h1 {
  font-size: 1.85rem;
  line-height: 1.15;
  margin: 0 0 12px 0;
  letter-spacing: -0.02em;
}

.role {
  font-weight: 650;
  margin: 0 0 10px 0;
}

.meta {
  color: var(--muted);
  margin: 0 0 6px 0;
}

.bio {
  margin-top: 28px;
  margin-bottom: 28px;
  line-height: 1.65;
  max-width: 100%;
}

.bio {
  color: #374151;
}

/* Contact */

.contact {
  list-style: none;
  padding: 0;
  margin: 28px 0 0 0;
}

.contact li {
  margin: 10px 0;
}

.contact a {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--accent);
  font-weight: 400;
}

.contact a:hover {
  color: var(--accent-soft);
  text-decoration: none;
}

.contact i {
  width: 18px;
  text-align: center;
  font-size: 0.95rem;
  color: var(--accent-soft);
}

/* Main content */

.content {
  padding: 36px 56px 64px 56px;
  max-width: 860px;
}

/* Navigation */

.nav {
  display: flex;
  gap: 26px;
  flex-wrap: wrap;
  padding-bottom: 16px;
  margin-bottom: 36px;
  border-bottom: 1px solid var(--line);
}

.nav a {
  color: var(--text);
  font-weight: 500;
}

/* Page content */

.page h1 {
  font-size: 1.8rem;
  margin-top: 0;
  letter-spacing: -0.02em;
}

.page h2 {
  margin-top: 2.2rem;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
}

.page p,
.page li {
  max-width: 720px;
}

.page ul {
  padding-left: 1.4rem;
}

/* Archive pages */

.archive-list {
  margin-top: 24px;
}

.archive-entry {
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

.archive-entry:first-child {
  border-top: none;
}

.archive-entry h2 {
  font-size: 1.1rem;
  margin: 0 0 4px 0;
}

.archive-meta {
  color: var(--muted);
  font-size: 0.95rem;
  margin: 0 0 8px 0;
}

/* Responsive */

@media (max-width: 900px) {
  .site {
    grid-template-columns: 1fr;
  }

  .sidebar {
    border-right: none;
    border-bottom: 1px solid var(--line);
    padding: 32px 22px 28px 22px;
  }

  .bio {
    max-width: none;
  }

  .content {
    padding: 28px 22px 40px 22px;
    max-width: none;
  }
}

.section-icon {
  color: var(--accent-soft);
  margin-right: 0.45rem;
  font-size: 0.95em;
}

.news-card {
  max-width: 760px;
  background: #f8fbfd;
  border: 1px solid #dbe8f2;
  border-radius: 14px;
  padding: 20px 24px;
  margin-top: 14px;
}

.news-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px solid #dbe8f2;
}

.news-item:last-child {
  border-bottom: none;
}

.news-date {
  font-weight: 700;
  color: var(--accent);
}

.research-grid {
  max-width: 760px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 14px;
}

.research-card {
  border: 1px solid #dbe8f2;
  border-radius: 14px;
  padding: 20px 22px;
  background: #ffffff;
  box-shadow: 0 8px 24px rgba(31, 79, 120, 0.06);
}

.research-card h3 {
  margin: 0 0 10px 0;
  color: var(--accent);
  font-size: 1rem;
}

.research-card p {
  margin: 0;
  color: var(--muted);
}

.research-card::before {
  content: "";
  display: block;
  width: 34px;
  height: 4px;
  border-radius: 999px;
  background: var(--highlight);
  margin-bottom: 16px;
}

@media (max-width: 700px) {
  .news-item {
    grid-template-columns: 1fr;
    gap: 4px;
  }

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

/* Homepage cards */

.research-grid {
  max-width: 760px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 14px;
}

.research-card {
  border: 1px solid #b9d7dd;
  border-radius: 14px;
  padding: 20px 22px;
  background: #ffffff;
  box-shadow: 0 8px 24px rgba(15, 61, 92, 0.08);
}

.research-card h3 {
  margin: 0 0 10px 0;
  color: #1f4f78;
  font-size: 1rem;
}

.research-card p {
  margin: 0;
  color: var(--muted);
}

.research-card::before {
  content: "";
  display: block;
  width: 34px;
  height: 4px;
  border-radius: 999px;
  background: #d9bf3b;
  margin-bottom: 16px;
}

@media (max-width: 700px) {
  .research-grid {
    grid-template-columns: 1fr;
  }
}

/* Final sidebar color override */

.contact a {
  color: var(--accent) !important;
}

.contact a:hover {
  color: var(--accent-soft) !important;
  text-decoration: none;
}

.contact i {
  color: var(--accent-soft) !important;
}

/* Hover animation */

.research-card {
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.research-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(15, 61, 92, 0.12);
}

.research-card {
  transition: transform 0.18s ease, box-shadow 0.18s ease;
  will-change: transform;
}

/* Talks */

.talk-entry {
  margin: 22px 0 30px 0;
  padding-left: 18px;
  border-left: 3px solid var(--accent-light);
}

.talk-title {
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}

.talk-meta {
  color: var(--muted);
  font-size: 0.95rem;
}