:root {
  --bg: #ffffff; --fg: #1f1f1f; --muted: #5f6368; --line: #e3e3e3; --accent: #0063b1; --card: #f6f8fb;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #1b1b1b; --fg: #f0f0f0; --muted: #a8a8a8; --line: #3a3a3a; --accent: #4aa3ec; --card: #242a31; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.6 "Segoe UI", system-ui, -apple-system, sans-serif; }
main { max-width: 780px; margin: 0 auto; padding: 24px 20px 64px; }
a { color: var(--accent); }
h1 { font-size: 30px; line-height: 1.2; margin: 8px 0 12px; }
h2 { font-size: 20px; margin: 36px 0 8px; padding-top: 4px; border-top: 1px solid var(--line); }
h3 { font-size: 16px; margin: 20px 0 4px; }
p, li { max-width: 68ch; }
.lead { font-size: 18px; color: var(--muted); }
.hero { display: flex; gap: 16px; align-items: center; }
.hero img { width: 72px; height: 72px; flex: none; }
.bar { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding-bottom: 12px; border-bottom: 1px solid var(--line); font-size: 14px; }
.bar nav { display: flex; gap: 14px; flex-wrap: wrap; }
.bar button { background: none; border: 1px solid var(--line); color: var(--fg); border-radius: 4px; padding: 3px 10px; cursor: pointer; font: inherit; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 14px 18px; margin: 12px 0; }
.card h3 { margin-top: 0; }
.btn { display: inline-block; background: var(--accent); color: #fff; padding: 9px 18px; border-radius: 4px; text-decoration: none; font-weight: 600; }
.todo { background: #fff4ce; color: #5c4400; padding: 0 4px; border-radius: 3px; font-weight: 600; }
.small { color: var(--muted); font-size: 14px; }
.banner { padding: 10px 14px; border-radius: 6px; margin: 14px 0; }
.banner.ok { background: #dff6dd; color: #0e4a12; }
.banner.ko { background: #fde7e9; color: #6e0811; }
code { background: var(--card); padding: 1px 5px; border-radius: 3px; font-size: 14px; }
footer { margin-top: 48px; padding-top: 12px; border-top: 1px solid var(--line); font-size: 14px; color: var(--muted); }
[hidden] { display: none !important; }
html[data-lang="en"] [lang="it"], html[data-lang="it"] [lang="en"] { display: none; }