* { box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  margin: 0;
  background: #f4f6fa;
  color: #1f2937;
}
header {
  background: #0b3d91;
  color: #fff;
  padding: 1rem 2rem;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}
header h1 { margin: 0 0 0.5rem 0; font-size: 1.4rem; }
nav button {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.5);
  color: #fff;
  padding: 0.4rem 1rem;
  margin-right: 0.5rem;
  border-radius: 4px;
  cursor: pointer;
}
nav button.active, nav button:hover { background: rgba(255,255,255,0.2); }

main { max-width: 1100px; margin: 1.5rem auto; padding: 0 1.5rem; }
.tab { display: none; background: #fff; padding: 1.5rem; border-radius: 8px; box-shadow: 0 2px 8px rgba(0,0,0,0.05); }
.tab.active { display: block; }
h2 { margin-top: 0; color: #0b3d91; }
.hint { color: #6b7280; font-size: 0.9rem; }

form fieldset {
  border: 1px solid #e5e7eb;
  border-radius: 6px;
  padding: 1rem;
  margin-bottom: 1rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.75rem;
}
form legend { font-weight: 600; padding: 0 0.5rem; color: #0b3d91; }
form label { display: flex; flex-direction: column; font-size: 0.85rem; color: #374151; }
form input, form select {
  margin-top: 0.25rem;
  padding: 0.5rem;
  border: 1px solid #d1d5db;
  border-radius: 4px;
  font-size: 0.9rem;
}
form button[type=submit] {
  background: #0b3d91;
  color: #fff;
  border: 0;
  padding: 0.6rem 1.5rem;
  border-radius: 4px;
  cursor: pointer;
  font-size: 1rem;
}
form button[type=submit]:hover { background: #082b66; }

#lookupForm, #listForm { display: flex; gap: 0.5rem; margin-bottom: 1rem; }
#lookupForm input, #listForm input { flex: 1; padding: 0.5rem; border: 1px solid #d1d5db; border-radius: 4px; }

.result { margin-top: 1rem; }
.card {
  border: 1px solid #e5e7eb;
  border-radius: 6px;
  padding: 1rem;
  margin-bottom: 0.75rem;
  background: #fafbfd;
}
.card h3 { margin: 0 0 0.5rem 0; color: #0b3d91; font-size: 1rem; }
.card .meta { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 0.4rem; font-size: 0.85rem; }
.card .meta div { color: #4b5563; }
.card .meta strong { color: #111827; }
.error { color: #b91c1c; padding: 0.5rem; background: #fee2e2; border-radius: 4px; }
.success { color: #047857; padding: 0.5rem; background: #d1fae5; border-radius: 4px; }