:root {
  color-scheme: light;
  --bg: #ffffff;
  --fg: #0a0a0a;
  --fg-90: rgba(10, 10, 10, 0.9);
  --muted: #6b7280;
  --muted-bg: rgba(107, 114, 128, 0.08);
  --accent: #2563eb;
  --border: #e5e7eb;
  --code-bg: #f3f4f6;
}
html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family:
    -apple-system,
    BlinkMacSystemFont,
    'Segoe UI',
    Roboto,
    Oxygen,
    Ubuntu,
    Cantarell,
    'Helvetica Neue',
    sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 3rem 1.25rem 5rem;
}
.container.narrow {
  max-width: 780px;
}
header.page-header {
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}
h1 {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 0.5rem;
}
@media (min-width: 640px) {
  h1 { font-size: 2.5rem; }
}
h2 {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 0.75rem;
}
@media (min-width: 640px) {
  h2 { font-size: 1.5rem; }
}
h3 {
  font-size: 1rem;
  font-weight: 700;
  margin: 0 0 0.5rem;
}
@media (min-width: 640px) {
  h3 { font-size: 1.125rem; }
}
p, li {
  color: var(--fg-90);
  font-size: 1rem;
}
.subtle {
  color: var(--muted);
  font-size: 0.9rem;
}
.stack {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}
section {
  padding-top: 0.25rem;
}
ul, ol {
  padding-left: 1.5rem;
  margin: 0.5rem 0;
}
ul li, ol li {
  margin-bottom: 0.35rem;
}
a {
  color: var(--accent);
  text-decoration: underline;
}
a:hover {
  text-decoration: none;
}
code {
  background: var(--code-bg);
  padding: 0.1rem 0.35rem;
  border-radius: 0.25rem;
  font-size: 0.9em;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}
.table-wrap {
  overflow-x: auto;
  margin: 0.75rem 0 0;
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
table thead th {
  text-align: left;
  padding: 0.55rem;
  font-weight: 600;
  border-bottom: 1px solid var(--border);
  background: var(--muted-bg);
}
table tbody td {
  padding: 0.55rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.callout {
  border: 1px solid var(--border);
  background: var(--muted-bg);
  border-radius: 0.5rem;
  padding: 1rem;
}
.callout p {
  margin: 0 0 0.4rem;
}
.callout p:last-child {
  margin-bottom: 0;
}
nav.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
  max-width: 900px;
  margin: 0 auto;
}
nav.topbar .brand {
  font-weight: 800;
  color: var(--accent);
  font-size: 1.25rem;
  text-decoration: none;
}
nav.topbar .links {
  display: flex;
  gap: 1rem;
}
nav.topbar .links a {
  color: var(--fg);
  text-decoration: none;
  font-size: 0.9rem;
}
nav.topbar .links a:hover {
  color: var(--accent);
}
footer.site-footer {
  border-top: 1px solid var(--border);
  padding: 2rem 1.25rem;
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
  max-width: 900px;
  margin: 3rem auto 0;
}