:root {
  --ground: #f6f2ea;
  --card: #fffdf8;
  --ink: #2b2620;
  --muted: #6f665b;
  --line: #ddd4c6;
  --accent: #8a4b2a;
  --accent-ink: #fffdf8;
  --error: #9b2c1f;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ground: #1c1a17;
    --card: #26231f;
    --ink: #eee7dc;
    --muted: #a99f91;
    --line: #3d3832;
    --accent: #d39a74;
    --accent-ink: #1c1a17;
    --error: #f08a7a;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  background: var(--ground);
  color: var(--ink);
  font: 16px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  display: grid;
  place-items: center;
  min-height: 100vh;
  padding: 24px 16px;
}
.card {
  width: 100%;
  max-width: 400px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 36px 32px 32px;
}
.mark {
  margin: 0 0 28px;
  font: 600 13px/1 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}
h1 {
  margin: 0 0 8px;
  font: 500 30px/1.15 "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
}
.lede { margin: 0 0 24px; color: var(--muted); }
label { display: block; margin: 0 0 16px; font-size: 14px; color: var(--muted); }
input {
  display: block;
  width: 100%;
  margin-top: 6px;
  padding: 11px 12px;
  font: inherit;
  color: var(--ink);
  background: var(--ground);
  border: 1px solid var(--line);
  border-radius: 8px;
}
input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
button {
  width: 100%;
  margin-top: 8px;
  padding: 12px;
  font: 600 15px/1 inherit;
  font-family: inherit;
  color: var(--accent-ink);
  background: var(--accent);
  border: 0;
  border-radius: 8px;
  cursor: pointer;
}
button:disabled { opacity: 0.6; cursor: default; }
button.quiet { color: var(--accent); background: transparent; border: 1px solid var(--line); }
.qr { display: block; margin: 0 auto 16px; padding: 8px; background: #fff; border-radius: 8px; }
.secret-label { margin: 0 0 4px; font-size: 14px; color: var(--muted); }
.secret { margin: 0 0 20px; font: 500 15px/1.4 ui-monospace, "SF Mono", Menlo, monospace; letter-spacing: 0.04em; word-break: break-all; }
.note { min-height: 1.5em; margin: 16px 0 0; font-size: 14px; color: var(--muted); }
.note.error { color: var(--error); }
[hidden] { display: none !important; }