:root {
  color-scheme: light dark;
  --bg: #f4f5f7;
  --card: #ffffff;
  --text: #1b1d22;
  --muted: #5d6370;
  --line: #d9dce2;
  --accent: #2d5bd7;
  --accent-text: #ffffff;
  --error: #b42318;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121418;
    --card: #1c1f25;
    --text: #e8eaee;
    --muted: #9aa1ad;
    --line: #333842;
    --accent: #7b9cff;
    --accent-text: #0d1220;
    --error: #ff8a80;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

.bar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  background: var(--card);
}
.brand { font-weight: 500; margin-right: auto; }
.who { color: var(--muted); font-size: 14px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

main { padding: 32px 16px; }
.card {
  max-width: 420px;
  margin: 0 auto;
  padding: 24px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
}
h1 { margin: 0 0 4px; font-size: 22px; }
.muted { color: var(--muted); }

form { display: grid; gap: 14px; margin-top: 16px; }
label { display: grid; gap: 4px; font-size: 14px; font-weight: 500; }
input {
  font: inherit;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
}
input[name="code"] { font-size: 22px; letter-spacing: 0.3em; font-variant-numeric: tabular-nums; }
input:focus-visible, button:focus-visible, summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

button {
  font: inherit;
  font-weight: 500;
  padding: 10px 16px;
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  color: var(--accent-text);
  cursor: pointer;
}
button:disabled { opacity: 0.6; cursor: progress; }
button.link { padding: 4px 0; background: none; color: var(--accent); }
button.secondary { background: none; color: var(--accent); border: 1px solid var(--accent); }

h2 { margin: 0 0 4px; font-size: 17px; }
.choice { display: grid; gap: 8px; margin-top: 16px; padding: 16px; border: 1px solid var(--line); border-radius: 10px; }
.choice p { margin: 0; }
#verify-passkey { display: grid; gap: 12px; margin-top: 16px; }
#verify-passkey p, form p.muted { margin: 0; }
.methods { margin: 0; padding-left: 20px; }
.or { margin: 16px 0 0; text-align: center; color: var(--muted); font-size: 14px; }
.notice { margin: 0 0 4px; color: var(--muted); font-size: 14px; }

.error { margin: 0; color: var(--error); font-size: 14px; }

.steps { padding-left: 20px; }
.steps li { margin-bottom: 12px; }
.qr { display: block; margin: 12px 0; padding: 8px; background: #ffffff; border-radius: 8px; }
summary { cursor: pointer; color: var(--accent); font-size: 14px; }
.secret {
  display: block;
  margin-top: 8px;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 15px;
  letter-spacing: 0.05em;
  word-break: break-all;
  user-select: all;
}

/* Where Cloudflare Turnstile shows its check, when it needs one */
.captcha { position: fixed; left: 50%; bottom: 16px; transform: translateX(-50%); z-index: 10; }