* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, sans-serif;
  background: #0f172a;
  color: #e2e8f0;
}
#app { padding: 1rem; }
.board-toolbar { margin-bottom: 1rem; }
button.refresh {
  background: #38bdf8;
  color: #0f172a;
  border: 0;
  border-radius: 6px;
  padding: 0.5rem 0.9rem;
  font-weight: 600;
  cursor: pointer;
}
.board-columns {
  display: grid;
  grid-template-columns: repeat(5, minmax(160px, 1fr));
  gap: 0.75rem;
  align-items: start;
}
.column {
  background: #1e293b;
  border-radius: 8px;
  padding: 0.75rem;
  min-height: 12rem;
}
.column-title {
  margin: 0 0 0.75rem;
  font-size: 1rem;
}
.card {
  background: #334155;
  border-radius: 6px;
  padding: 0.6rem;
  margin-bottom: 0.5rem;
  font-size: 0.85rem;
  line-height: 1.35;
}
.card-title { font-weight: 700; margin-bottom: 0.25rem; }
.card-blocked { color: #fca5a5; margin-top: 0.25rem; }
.history {
  margin-top: 1.5rem;
  background: #1e293b;
  border-radius: 8px;
  padding: 0.75rem 1rem;
}
.history-list { list-style: none; padding: 0; margin: 0; }
.history-item {
  padding: 0.4rem 0;
  border-bottom: 1px solid #334155;
  font-size: 0.85rem;
}