:root {
  --bg-color: #f8fafc;
  --card-bg: #ffffff;
  --border-color: #e2e8f0;
  --text-main: #1e293b;
  --text-muted: #64748b;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --success: #10b981;
  --success-hover: #059669;
  --danger: #ef4444;
  --tree-hover: #f1f5f9;
}

* {
  box-sizing: border-box;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
  margin: 0;
  padding: 20px;
  background-color: var(--bg-color);
  color: var(--text-main);
  display: flex;
  flex-direction: column;
  height: 100vh;
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 15px;
  flex-wrap: wrap;
  gap: 10px;
}

h1 {
  font-size: 1.25rem;
  margin: 0;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 8px;
}

.top-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.panel {
  flex: 1;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 15px;
  display: flex;
  flex-direction: column;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
  min-height: 0;
}

.toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  gap: 10px;
}

.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  background: #ffffff;
  border: 1px solid var(--border-color);
  padding: 6px 12px;
  border-radius: 6px;
  width: 300px;
}

.search-box input {
  border: none;
  outline: none;
  width: 100%;
  font-size: 0.85rem;
  background: transparent;
}

button {
  padding: 8px 12px;
  background-color: var(--primary);
  color: white;
  border: none;
  border-radius: 6px;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 0.8rem;
}

button:hover { background-color: var(--primary-hover); }
button.btn-export { background-color: var(--success); }
button.btn-export:hover { background-color: var(--success-hover); }
button.btn-secondary { background-color: #64748b; }
button.btn-secondary:hover { background-color: #475569; }

/* Árbol */
.tree-viewer {
  flex: 1;
  overflow-y: auto;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 15px;
  background: #ffffff;
}

.tree-node { user-select: none; }

.tree-content {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  border-radius: 4px;
  color: var(--text-main);
  font-size: 0.9rem;
}

.tree-content:hover { background-color: var(--tree-hover); }

.delete-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 2px 4px;
  border-radius: 4px;
  transition: color 0.2s, background-color 0.2s;
}

.tree-content:hover .delete-btn { display: inline-flex; }
.delete-btn:hover { color: var(--danger); background-color: #fee2e2; }

.tree-children {
  margin-left: 20px;
  border-left: 1px dashed var(--border-color);
  padding-left: 5px;
}

.tree-children.collapsed { display: none; }

.icon-node { width: 18px; height: 18px; stroke-width: 2; }
.icon-area { color: #8b5cf6; }
.icon-machine { color: #0284c7; }

.toggle-btn {
  width: 16px;
  height: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  color: var(--text-muted);
  cursor: pointer;
}

.badge {
  font-size: 0.7rem;
  padding: 2px 6px;
  border-radius: 4px;
  background-color: #f1f5f9;
  color: var(--text-muted);
}

.badge-id, .badge-id-machine {
  font-weight: 600;
  font-family: monospace;
  cursor: pointer;
  transition: transform 0.1s, filter 0.2s;
}

.badge-id { background-color: #f3e8ff; color: #6b21a8; }
.badge-id-machine { background-color: #e0f2fe; color: #0369a1; }

.badge-id:hover, .badge-id-machine:hover {
  filter: brightness(0.92);
  transform: scale(1.02);
}

.node-title { flex: 1; font-weight: 500; }
.highlight { background-color: #fef08a; border-radius: 2px; padding: 0 2px; }

.toast {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: #1e293b;
  color: #fff;
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 0.85rem;
  display: none;
  z-index: 2000;
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

/* Selector de Área para Exportar Imagen */
.area-picker-list {
  max-height: 250px;
  overflow-y: auto;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.area-picker-item {
  padding: 8px 10px;
  border-radius: 4px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  background: #fafafa;
  border: 1px solid transparent;
}

.area-picker-item:hover {
  background: #f1f5f9;
  border-color: var(--border-color);
}

.area-picker-item.active {
  background: #eff6ff;
  border-color: var(--primary);
  color: var(--primary);
  font-weight: 600;
}

/* Modales */
.modal {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.5);
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal-content {
  background: #fff;
  padding: 20px;
  border-radius: 8px;
  width: 650px;
  max-width: 90%;
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.option-group { display: flex; gap: 10px; margin-bottom: 5px; }

.option-btn {
  flex: 1;
  padding: 10px;
  border: 1px solid var(--border-color);
  background: #fafafa;
  color: var(--text-main);
  border-radius: 6px;
  cursor: pointer;
  font-weight: 500;
  text-align: center;
}

.option-btn.active {
  border-color: var(--primary);
  background: #eff6ff;
  color: var(--primary);
  font-weight: 600;
}

textarea {
  width: 100%;
  height: 230px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 10px;
  font-family: monospace;
  font-size: 0.85rem;
  resize: vertical;
  outline: none;
  background-color: #fafafa;
}

textarea:focus {
  border-color: var(--primary);
  background-color: #fff;
}

.modal-actions { display: flex; justify-content: flex-end; gap: 10px; }