:root {
  --accent: #05b0ee;
  --accent-soft: #e3f6fd;
  --bg: #ffffff;
  --surface: #f8fafc;
  --border: #e2e8f0;
  --text: #1a1d23;
  --muted: #64748b;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}
.page-shell { max-width: 720px; margin: 0 auto; padding: 2rem 1.25rem 4rem; }
.top-bar { margin-bottom: 1.5rem; }
.page-title { font-size: 1.5rem; font-weight: 600; margin: 0; }
.card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
}
.muted { color: var(--muted); }
.notice {
  padding: 0.75rem 1rem;
  border-radius: 8px;
  margin: 1rem 0;
  border: 1px solid;
}
.notice--warn { background: #fef9e7; border-color: #f0d77b; color: #7a5b00; }
.hierarchy-form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1rem;
}
.field { display: flex; flex-direction: column; gap: 0.3rem; }
.field span { font-size: 0.75rem; color: var(--muted); }
.field input {
  background: var(--bg);
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  padding: 0.55rem 0.65rem;
  color: var(--text);
  font-size: 0.85rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}
.field input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.load-btn {
  background: var(--accent);
  color: #fff;
}
.load-btn:hover { background: #039fd4; }
.cards { display: flex; flex-direction: column; gap: 0.75rem; margin-top: 1rem; }
.card-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.9rem 1rem;
}
.card-row .masked { font-variant-numeric: tabular-nums; letter-spacing: 0.05em; }
.card-row .actions { display: flex; gap: 0.5rem; flex-wrap: wrap; }
button {
  cursor: pointer;
  border: none;
  border-radius: 8px;
  padding: 0.55rem 0.9rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: #fff;
}
button:disabled { opacity: 0.5; cursor: not-allowed; }
.apple { background: #000; border: 1px solid #3a3a3a; }
.google { background: #1a73e8; }
.result {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
  margin-top: 1rem;
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 0.8rem;
}
.hidden { display: none; }
code { background: var(--accent-soft); color: #06597a; padding: 0.1rem 0.35rem; border-radius: 4px; }