:root {
  --bg: #f7f7f8;
  --fg: #16181d;
  --muted: #5d6270;
  --card: #ffffff;
  --line: #d9dbe1;
  --accent: #1d4ed8;
  --ok: #15803d;
  --bad: #b91c1c;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111317;
    --fg: #e8e9ec;
    --muted: #9aa0ad;
    --card: #1b1e24;
    --line: #2e323b;
    --accent: #7aa2ff;
    --ok: #4ade80;
    --bad: #f87171;
  }
}
* {
  box-sizing: border-box;
}
body {
  margin: 0 auto;
  max-width: 640px;
  padding: 16px 16px calc(24px + env(safe-area-inset-bottom));
  background: var(--bg);
  color: var(--fg);
  font:
    16px/1.5 system-ui,
    -apple-system,
    "Segoe UI",
    "Noto Sans KR",
    sans-serif;
}
body.busy {
  cursor: progress;
}
h1 {
  font-size: 1.4rem;
  margin: 0 0 4px;
}
h2 {
  font-size: 1.1rem;
  margin: 0 0 8px;
}
section,
article {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px;
  margin: 12px 0;
}
article {
  margin: 8px 0;
}
article.decided,
article.expired {
  opacity: 0.7;
}
label {
  display: block;
  margin: 8px 0;
  font-size: 0.9rem;
  color: var(--muted);
}
input {
  display: block;
  width: 100%;
  margin-top: 4px;
  padding: 10px;
  font-size: 1rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg);
  color: var(--fg);
}
button {
  min-height: 44px;
  padding: 8px 14px;
  margin: 6px 6px 0 0;
  font-size: 1rem;
  border-radius: 8px;
  border: 0;
  background: var(--accent);
  color: #fff;
}
button.secondary {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--line);
}
button.approve {
  background: var(--ok);
  color: #fff;
}
button.reject {
  background: var(--bad);
  color: #fff;
}
body.busy button {
  opacity: 0.6;
}
.row {
  display: flex;
  flex-wrap: wrap;
}
.muted {
  color: var(--muted);
  font-size: 0.9rem;
}
.code {
  font-size: 1.4rem;
  letter-spacing: 0.05em;
  font-variant-numeric: tabular-nums;
}
.mono,
pre {
  font-family: ui-monospace, Menlo, Consolas, monospace;
  font-size: 0.8rem;
  overflow-wrap: anywhere;
  white-space: pre-wrap;
}
#notice:empty {
  display: none;
}
#notice {
  padding: 10px;
  border-radius: 8px;
}
#notice.ok {
  background: color-mix(in srgb, var(--ok) 15%, transparent);
}
#notice.error {
  background: color-mix(in srgb, var(--bad) 15%, transparent);
}