:root {
  color-scheme: light dark;
  --bg: #f6f6f4;
  --panel: #ffffff;
  --text: #1d1d1f;
  --muted: #66666b;
  --line: #e2e2de;
  --field: #ffffff;
  --accent: #2563d6;
  --accent-text: #ffffff;
  --soft: #eef3fd;
  --good: #2f7d4f;
  --bad: #b3261e;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1b1b1d;
    --panel: #242427;
    --text: #f1f1f2;
    --muted: #a3a3a9;
    --line: #3a3a3e;
    --field: #1e1e21;
    --accent: #5a8ff0;
    --accent-text: #0d1117;
    --soft: #26324a;
    --good: #6cc592;
    --bad: #f28b82;
  }
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", "Ubuntu", system-ui, sans-serif;
}
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
}
.brand { font-size: 17px; font-weight: 650; color: inherit; text-decoration: none; }
main { max-width: 640px; margin: 0 auto; padding: 32px 16px 48px; }
h1 { font-size: 22px; font-weight: 650; margin: 0 0 6px; }
h2 { font-size: 17px; font-weight: 650; margin: 0 0 4px; }
p { margin: 0 0 12px; }
.lead { color: var(--muted); margin: 0 0 20px; }
.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px 20px;
  margin-bottom: 16px;
}
label { display: block; font-size: 14px; color: var(--muted); margin: 16px 0 6px; }
input[type=email], input[type=text] {
  width: 100%;
  font: inherit;
  color: var(--text);
  background: var(--field);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 9px 11px;
}
.actions { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-top: 18px; }
button.primary, button.plain {
  font: inherit;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: 8px;
  cursor: pointer;
}
button.primary { background: var(--accent); color: var(--accent-text); border: 1px solid var(--accent); }
button.plain { background: transparent; color: var(--text); border: 1px solid var(--line); }
button.link { font: inherit; padding: 0; border: 0; background: none; color: var(--accent); cursor: pointer; }
button:disabled { opacity: 0.5; cursor: default; }
input[type=checkbox] { accent-color: var(--accent); width: 18px; height: 18px; }
.switch { display: flex; gap: 10px; align-items: center; margin: 16px 0 0; color: var(--text); font-size: 15px; }
.status { margin-top: 14px; }
.status:empty { margin-top: 0; }
.status.good { color: var(--good); }
.status.bad { color: var(--bad); }
.muted { color: var(--muted); }
.qr { display: block; width: 184px; height: 184px; margin: 8px 0 12px; background: #ffffff; border-radius: 8px; padding: 8px; }
.mono { font: 16px/1.5 ui-monospace, "SF Mono", Menlo, Consolas, "Ubuntu Mono", monospace; }
.code { font: 600 28px/1.3 ui-monospace, "SF Mono", Menlo, Consolas, "Ubuntu Mono", monospace; margin: 4px 0 10px; }
.codes {
  display: grid;
  grid-template-columns: repeat(2, max-content);
  gap: 6px 28px;
  margin: 12px 0;
  font: 16px/1.5 ui-monospace, "SF Mono", Menlo, Consolas, "Ubuntu Mono", monospace;
}
.panel { margin-top: 14px; padding: 14px 16px; border-radius: 10px; background: var(--soft); }
.row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  width: 100%;
  font: inherit;
  text-align: left;
  color: inherit;
  padding: 12px 0;
  border: 0;
  border-top: 1px solid var(--line);
  background: none;
  cursor: pointer;
}
.row:first-of-type { border-top: 0; }
.row .muted { font-size: 14px; }