#graph {
  width: 100%;
  height: 100vh;
}

#popup {
  display: none;
  position: fixed;
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 16px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  z-index: 100;
  min-width: 200px;
  max-width: 400px;
}

.popup-title {
  font-weight: 600;
  margin-bottom: 12px;
  word-wrap: break-word;
  color: var(--text-color);
}

.popup-error {
  display: none;
  color: var(--node-error);
  font-size: 14px;
  padding: 8px 0;
  border-top: 1px solid var(--border-color);
  margin-bottom: 8px;
}

.popup-buttons {
  display: flex;
  gap: 8px;
}

.popup-buttons button {
  flex: 1;
  padding: 8px 16px;
  border: none;
  border-radius: 6px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.2s;
}

.popup-buttons button:hover {
  opacity: 0.9;
}

#open-btn {
  background-color: var(--node-default);
  color: white;
}

#expand-btn {
  background-color: var(--node-expanded);
  color: white;
}

/* Disabled state for buttons */
.popup-buttons button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Controls container */
#controls {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: row;
  align-items: flex-end;
  gap: 8px;
  z-index: 100;
}

/* Reset button */
#reset-graph {
  width: 40px;
  height: 40px;
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  color: var(--text-color);
  font-size: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
  transition: background-color 0.15s;
}

#reset-graph:hover {
  background: var(--border-color);
}

#reset-graph:active {
  background: var(--border-color);
  opacity: 0.8;
}

/* Zoom controls */
#zoom-controls {
  display: flex;
  flex-direction: column;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
  border-radius: 4px;
}

#zoom-controls button {
  width: 40px;
  height: 40px;
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  color: var(--text-color);
  font-size: 20px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.15s;
}

#zoom-controls button:hover {
  background: var(--border-color);
}

#zoom-controls button:active {
  background: var(--border-color);
  opacity: 0.8;
}

#zoom-in {
  border-radius: 4px 4px 0 0;
  border-bottom: none;
}

#zoom-out {
  border-radius: 0 0 4px 4px;
}