/* Mobile-first. */
:root {
  --bg: #f4f5f7;
  --card: #fff;
  --text: #1c1f24;
  --muted: #5d6470;
  --accent: #1f4fd1;
  --accent-text: #fff;
  --border: #d7dbe2;
  --error: #b42318;
  --notice-bg: #eef3ff;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a; --card: #1d2026; --text: #e8eaee; --muted: #9aa2ae;
    --accent: #6b8cff; --accent-text: #0d1020; --border: #343943;
    --error: #ff8a80; --notice-bg: #1f2a44;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0; padding: 16px; background: var(--bg); color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
.card {
  max-width: 440px; margin: 24px auto; padding: 24px 20px;
  background: var(--card); border: 1px solid var(--border); border-radius: 12px;
}
h1 { font-size: 1.4rem; margin: 0 0 16px; word-break: break-word; }
h2 { font-size: 1.15rem; margin: 0 0 8px; }
h3 { font-size: 1rem; margin: 20px 0 4px; }
label { display: block; font-weight: 600; margin: 16px 0 6px; }
label.check { font-weight: 400; display: flex; gap: 8px; align-items: center; }
input[type=text], input[type=email] {
  width: 100%; padding: 12px; font-size: 1.05rem; color: var(--text); background: var(--card);
  border: 1px solid var(--border); border-radius: 8px;
}
input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
button {
  display: block; width: 100%; margin-top: 20px; padding: 13px; font-size: 1rem; font-weight: 600;
  background: var(--accent); color: var(--accent-text); border: 0; border-radius: 8px; cursor: pointer;
}
button:disabled { opacity: .6; cursor: wait; }
button.link {
  background: none; color: var(--accent); width: auto; margin: 12px auto 0; padding: 6px; font-weight: 500;
}
.muted { color: var(--muted); }
.small { font-size: .9rem; margin: 6px 0 0; }
.notice { background: var(--notice-bg); padding: 12px; border-radius: 8px; }
.error { color: var(--error); font-weight: 600; margin: 16px 0 0; }
#qr { display: block; margin: 12px auto; background: #fff; border-radius: 8px; max-width: 100%; height: auto; }
.secret { display: block; margin-top: 8px; font-size: .95rem; word-break: break-all; }
.recovery {
  columns: 2; padding-left: 1.6em; margin: 8px 0; font-family: ui-monospace, Consolas, monospace; font-size: .95rem;
}
.topbar {
  display: flex; justify-content: space-between; align-items: center;
  max-width: 440px; margin: 0 auto;
}
.topbar button.link { margin: 0; }
.facts dt { font-weight: 600; margin-top: 8px; }
.facts dd { margin: 0; color: var(--muted); }
@media (min-width: 768px) {
  .card { padding: 32px; margin-top: 64px; }
}