body { 
  font-family: Arial, sans-serif; 
  margin: 0; 
  padding: 20px; 
  background: #f9f9f9; 
}

h1 { 
  color: #333; 
}

.container { 
  display: flex; 
  flex-direction: row; 
}

.block-list { 
  width: 250px; 
  margin-right: 20px; 
}

.block-item { 
  padding: 10px; 
  margin: 5px 0; 
  background: #f5f5f5; 
  border-radius: 4px; 
  cursor: pointer;
  border-left: 4px solid #2196F3;
  transition: all 0.3s ease;
}

.block-item:hover { 
  background: #e0e0e0; 
}

.block-item.active { 
  background: #e3f2fd; 
}

.block-item.recently-updated {
  animation: pulse 1.5s;
  border-left-color: #e91e63;
}

@keyframes pulse {
  0% { background-color: #f5f5f5; }
  50% { background-color: #ffcdd2; }
  100% { background-color: #f5f5f5; }
}

.timeline-view { 
  flex: 1; 
}

.timeline-item {
  border-left: 2px solid #2196F3;
  padding: 10px;
  margin: 10px 0 10px 20px;
  position: relative;
}

.timeline-item:before {
  content: '';
  position: absolute;
  width: 12px;
  height: 12px;
  background: #2196F3;
  border-radius: 50%;
  left: -7px;
  top: 10px;
}

.timeline-item.attribute-edit {
  border-left-color: #e91e63;
}

.timeline-item.attribute-edit:before {
  background: #e91e63;
}

.timeline-item.moved {
  border-left-color: #4caf50;
}

.timeline-item.moved:before {
  background: #4caf50;
}

.timeline-item.scaled {
  border-left-color: #ff9800;
}

.timeline-item.scaled:before {
  background: #ff9800;
}

.timeline-item.stretched {
  border-left-color: #9c27b0;
}

.timeline-item.stretched:before {
  background: #9c27b0;
}

.timeline-item.rotated {
  border-left-color: #795548;
}

.timeline-item.rotated:before {
  background: #795548;
}

.timeline-time {
  color: #666;
  font-size: 0.8em;
}

.action-type {
  font-weight: bold;
  margin-right: 10px;
}

.block-action-details {
  margin-top: 5px;
  padding: 8px;
  background: #f5f5f5;
  border-radius: 4px;
}

.timeline-container {
  max-height: 600px;
  overflow-y: auto;
  padding-right: 10px;
}

.block-info {
  margin-bottom: 15px;
  padding: 10px;
  background: #f5f5f5;
  border-radius: 4px;
}

.changes { 
  color: #e91e63; 
  font-weight: bold; 
}

.current { 
  color: #4caf50; 
  font-weight: bold; 
}

.initial { 
  color: #2196F3; 
  font-weight: bold; 
}

.attribute { 
  color: #333; 
}

.attribute-section {
  border-top: 1px solid #ddd;
  margin-top: 8px;
  padding-top: 8px;
}

.attribute-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 4px;
}

@media (min-width: 768px) {
  .attribute-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.collapsible {
  cursor: pointer;
  padding: 5px 0;
  width: 100%;
  border: none;
  text-align: left;
  outline: none;
  background-color: transparent;
  font-weight: bold;
  position: relative;
}

.collapsible:after {
  content: '+';
  font-weight: bold;
  float: right;
  margin-left: 5px;
}

.active-collapse:after {
  content: "-";
}

.collapse-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.2s ease-out;
}

.notification {
  position: fixed;
  bottom: 20px;
  right: 20px;
  padding: 10px 20px;
  background-color: #4caf50;
  color: white;
  border-radius: 4px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
  opacity: 0;
  transition: opacity 0.3s;
  z-index: 1000;
}

.notification.show {
  opacity: 1;
}