:root { color-scheme: light dark; --bg: #f6f6f8; --card: #fff; --fg: #1d1d22; --muted: #5b5b66; --accent: #4a6cf7; --bad: #c0392b; --ok: #1e8e4f; }
@media (prefers-color-scheme: dark) { :root { --bg: #15161a; --card: #1f2026; --fg: #ececf1; --muted: #a3a3ad; --accent: #7d95ff; --bad: #ff7b6b; --ok: #5ed38f; } }
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; display: grid; place-items: center; background: var(--bg); color: var(--fg); font: 16px/1.5 system-ui, sans-serif; padding: 16px; }
main { width: 100%; max-width: 420px; background: var(--card); border-radius: 12px; padding: 24px; box-shadow: 0 2px 16px rgb(0 0 0 / .08); }
h1 { font-size: 1.3rem; margin: 0 0 12px; }
p { color: var(--muted); }
.avviso { color: var(--fg); border-left: 3px solid var(--bad); padding-left: 10px; }
label { display: block; margin: 12px 0; font-weight: 600; }
input { display: block; width: 100%; margin-top: 4px; padding: 10px; border-radius: 8px; border: 1px solid var(--muted); background: transparent; color: inherit; font: inherit; }
button { width: 100%; padding: 12px; border: 0; border-radius: 8px; background: var(--accent); color: #fff; font: inherit; font-weight: 600; cursor: pointer; }
button:disabled { opacity: .6; cursor: default; }
#esito.ok { color: var(--ok); }
#esito.bad { color: var(--bad); }
body.lungo { place-items: start center; }
body.lungo main { max-width: 760px; }
body.lungo p, body.lungo li { color: var(--fg); }
h2 { font-size: 1.05rem; margin: 24px 0 8px; }
ul { padding-left: 20px; }
a { color: var(--accent); }
.nota { color: var(--muted); font-size: .9rem; }
.check { display: flex; gap: 8px; align-items: flex-start; font-weight: 400; }
.check input { width: auto; margin-top: 5px; }
button.pericolo { background: var(--bad); }
section[hidden], form[hidden] { display: none; }
footer { margin-top: 24px; font-size: .9rem; color: var(--muted); }