* { box-sizing: border-box; }
html { color-scheme: dark; }
body {
  margin: 0;
  background: var(--shell-bg);
  color: var(--shell-ink);
  font-family: var(--shell-font-body);
  line-height: 1.5;
}
a { color: inherit; }
.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--shell-space-sm) var(--shell-space-md);
  border-bottom: 1px solid var(--shell-border);
}
.brand {
  font-family: var(--shell-font-display);
  font-weight: 700;
  text-decoration: none;
  font-size: 1.1rem;
}
.brand span { color: var(--shell-accent); }
.brand-parent {
  font-size: .85rem;
  color: var(--shell-ink-dim);
  text-decoration: none;
}
.site-footer {
  padding: var(--shell-space-lg) var(--shell-space-md);
  text-align: center;
  color: var(--shell-ink-dim);
  font-size: .85rem;
  border-top: 1px solid var(--shell-border);
}