:root {
  color-scheme: light dark;
  --bg: light-dark(#fff, #1a1a1a);
  --fg: light-dark(#1a1a1a, #e0e0e0);
  --muted: light-dark(#666, #999);
  --border: light-dark(#e0e0e0, #333);
  --code-bg: light-dark(#f5f5f5, #2d2d2d);
  --link: light-dark(#06c, #4da6ff);
}

@media (prefers-color-scheme: dark) {
  :root:has(#theme-toggle:checked) { color-scheme: light; }
}
@media (prefers-color-scheme: light) {
  :root:has(#theme-toggle:checked) { color-scheme: dark; }
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: system-ui, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--fg);
  background: var(--bg);
  max-width: 40rem;
  margin: 0 auto;
  padding: 1rem;
}

header nav { display: flex; justify-content: space-between; align-items: center; padding: 1rem 0; border-bottom: 1px solid var(--border); margin-bottom: 2rem; }
header nav a { font-weight: 600; color: var(--fg); text-decoration: none; }
#theme-toggle { display: none; }
label[for="theme-toggle"] { cursor: pointer; font-size: 1.25rem; }

main > ul { list-style: none; }
main > ul > li { padding: 0.5rem 0; }

article ul { margin: 1rem 0; padding-left: 1.5rem; }
article ol { margin: 1rem 0; padding-left: 1.5rem; }

h1 { font-size: 1.75rem; margin-bottom: 1rem; }
h2 { font-size: 1.5rem; margin: 2rem 0 1rem; }
h3 { font-size: 1.25rem; margin: 1.5rem 0 0.75rem; }
p { margin-bottom: 1rem; }

table { width: 100%; border-collapse: collapse; margin: 1.5rem 0; }
th, td { text-align: left; padding: 0.75rem 0; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-size: 0.85em; text-transform: uppercase; letter-spacing: 0.05em; }
tr:last-child td { border-bottom: none; }

a { color: var(--link); }
time { color: var(--muted); font-size: 0.875rem; white-space: nowrap; }

article header { margin-bottom: 2rem; }
article header h1 { margin-bottom: 0.5rem; }

img {
  display: block;
  max-width: 100%;
  max-height: 25rem;
  width: auto;
  height: auto;
  margin: 1.5rem auto;
  border-radius: 4px;
  background: var(--code-bg);
  border: 1px solid var(--border);
  padding: 0.5rem;
}

@media (prefers-color-scheme: dark) { img { opacity: 0.9; } }

/* Magic grid for list of images */
ul:has(> li > img:only-child) {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 1rem;
  padding: 0;
  list-style: none;
}
ul:has(> li > img:only-child) img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  margin: 0; /* Let grid gap handle spacing */
}

pre { background: var(--code-bg); border: 1px solid var(--border); padding: 1rem; overflow-x: auto; border-radius: 4px; margin: 1rem 0; }
code { background: var(--code-bg); padding: 0.125rem 0.25rem; border-radius: 2px; font-family: ui-monospace, monospace; font-size: 0.9em; }
pre code { background: none; padding: 0; }

footer { margin-top: 4rem; padding: 1rem 0; border-top: 1px solid var(--border); color: var(--muted); font-size: 0.875rem; }