:root {
  color-scheme: light dark;
  font-family: system-ui, sans-serif;
  --muted: color-mix(in srgb, CanvasText 50%, Canvas);
  --line: color-mix(in srgb, CanvasText 15%, Canvas);
}
body { margin: 0; background: Canvas; color: CanvasText; }
main { max-width: 32rem; margin: 0 auto; padding: 2rem 1rem; }
h1 { font-weight: 600; }
form { display: inline; margin: 0; }
button { font: inherit; cursor: pointer; }

.add { display: flex; gap: 0.5rem; margin-bottom: 1rem; }
.add input { flex: 1; font: inherit; padding: 0.5rem 0.75rem; border: 1px solid var(--line); border-radius: 0.5rem; }
.add button { padding: 0.5rem 1rem; border: 0; border-radius: 0.5rem; background: CanvasText; color: Canvas; }

.filters { display: flex; gap: 0.75rem; margin-bottom: 1rem; font-size: 0.9rem; }
.filters a { color: var(--muted); text-decoration: none; }
.filters a.is-active { color: CanvasText; font-weight: 600; }

.todos { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.todos li { display: flex; align-items: center; gap: 0.5rem; padding: 0.5rem 0; border-bottom: 1px solid var(--line); }
.todos .title { flex: 1; }
.todos li.is-done .title { color: var(--muted); text-decoration: line-through; }
.check, .delete { background: none; border: 0; font-size: 1.1rem; padding: 0.25rem 0.5rem; }
.delete { color: var(--muted); }
.delete:hover { color: crimson; }
.empty { color: var(--muted); }

footer { display: flex; justify-content: space-between; margin-top: 1rem; font-size: 0.9rem; color: var(--muted); }
.link { background: none; border: 0; color: var(--muted); text-decoration: underline; padding: 0; }
.meta { margin-top: 2rem; font-size: 0.8rem; color: var(--muted); }