:root {
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #6b7280;
  --accent: #2563eb;
  --border: #e5e7eb;
  --maxw: 46rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --fg: #e6e6e6;
    --muted: #9aa3b2;
    --accent: #6ea8fe;
    --border: #232733;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

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

h1 { font-size: 2rem; line-height: 1.2; margin: 0 0 .5rem; }
h2 { font-size: 1.25rem; margin: 2.25rem 0 .5rem; }

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: .9em;
  background: var(--border);
  padding: .1em .35em;
  border-radius: 4px;
}

/* Header */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .5rem 1rem;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 1.25rem;
  border-bottom: 1px solid var(--border);
}
.brand { font-weight: 600; color: var(--fg); }
.site-header nav { display: flex; flex-wrap: wrap; gap: .35rem 1.1rem; }
.site-header nav a { color: var(--muted); white-space: nowrap; }
.site-header nav a:hover { color: var(--fg); text-decoration: none; }

/* Intro */
.intro {
  display: flex;
  gap: 1.5rem;
  align-items: center;
  margin-bottom: 1rem;
}
.avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  border: 1px solid var(--border);
}
.intro-text h1 { margin-bottom: .25rem; }
.tagline { color: var(--muted); margin: 0 0 .75rem; }
.links a { margin-right: 1rem; }

@media (max-width: 480px) {
  .intro { flex-direction: column; text-align: center; align-items: center; }
  .links a { display: inline-block; }
}

/* Lists */
.research-list, .post-list { list-style: none; padding: 0; }
.research-list li, .post-list li {
  padding: .9rem 0;
  border-bottom: 1px solid var(--border);
}
.research-list li:last-child, .post-list li:last-child { border-bottom: none; }
.research-list a, .post-list a { font-weight: 600; }
.research-list p, .post-list p { margin: .25rem 0 0; color: var(--muted); }
.meta { color: var(--muted); font-size: .9rem; margin-left: .5rem; }

/* Post */
.post .meta { display: block; margin: 0 0 1.5rem .0; }
.post p { margin: 1rem 0; }

/* Footer */
.site-footer {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 1.5rem 1.25rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: .9rem;
}