body {
  font-family: Arial, sans-serif;
  margin: 0;
  background: #f3f5fb;
  color: #1d2742;
}
header {
  padding: 1rem 1.5rem;
  background: #1f3a8a;
  color: #fff;
}
main {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  padding: 1rem;
}
.panel {
  background: #fff;
  border-radius: 8px;
  padding: 1rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
}
#editor-panel {
  grid-column: 1 / -1;
}
.hidden { display: none; }
#slide-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.slide-item {
  cursor: pointer;
  padding: 0.5rem;
  margin-bottom: 0.4rem;
  border: 1px solid #d8def3;
  border-radius: 6px;
}
.slide-item.active { border-color: #1f3a8a; background: #eef2ff; }
.block {
  border: 1px solid #d8def3;
  padding: 0.75rem;
  border-radius: 6px;
  margin-bottom: 0.6rem;
}
.block-row {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  flex-wrap: wrap;
}
button {
  border: none;
  background: #1f3a8a;
  color: white;
  border-radius: 4px;
  padding: 0.35rem 0.7rem;
  cursor: pointer;
}
button:disabled { opacity: 0.45; cursor: not-allowed; }
.locked-badge {
  background: #fee2e2;
  color: #991b1b;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
}
.editor-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}