body {
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  display: flex;
  height: 100vh;
}

#sidebar {
  width: 300px;
  background: #f8f9fa;
  border-right: 1px solid #dee2e6;
  overflow-y: auto;
  flex-shrink: 0;
  transition: margin-left 0.3s ease;
}

#sidebar.collapsed {
  margin-left: -300px;
}

#sidebar-header {
  padding: 15px;
  background: #343a40;
  color: white;
  font-weight: bold;
  position: sticky;
  top: 0;
  z-index: 100;
}

#component-list {
  padding: 10px;
}

.component-category {
  margin-bottom: 15px;
}

.category-title {
  font-weight: bold;
  color: #495057;
  margin-bottom: 8px;
  padding: 8px 12px;
  background: #e9ecef;
  border-radius: 4px;
  cursor: pointer;
  user-select: none;
}

.category-title:hover {
  background: #dee2e6;
}

.component-item {
  padding: 6px 12px;
  margin: 2px 0;
  cursor: pointer;
  border-radius: 3px;
  font-size: 13px;
  color: #495057;
  border-left: 3px solid transparent;
  transition: all 0.2s ease;
}

.component-item:hover {
  background: #e3f2fd;
  border-left-color: #2196f3;
  color: #1976d2;
}

.category-items {
  padding-left: 15px;
}

.category-items.collapsed {
  display: none;
}

.component-details {
  margin-top: 8px;
  padding: 8px;
  background: #f8f9fa;
  border-radius: 3px;
  font-size: 12px;
  border-left: 2px solid #dee2e6;
  display: none;
}

.component-details.expanded {
  display: block;
}

.detail-section {
  margin-bottom: 10px;
}

.detail-title {
  font-weight: bold;
  color: #495057;
  margin-bottom: 4px;
  display: flex;
  align-items: center;
}

.detail-content {
  padding-left: 16px;
  color: #6c757d;
  line-height: 1.4;
}

.status-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: 6px;
}

.status-operational { background: #28a745; }
.status-maintenance { background: #ffc107; }
.status-critical { background: #dc3545; }

.price-range {
  font-weight: bold;
  color: #28a745;
}

.brand-preferred {
  color: #007bff;
  font-weight: bold;
}

.brand-alternative {
  color: #6c757d;
}

.maintenance-freq {
  background: #e3f2fd;
  padding: 2px 6px;
  border-radius: 2px;
  font-size: 11px;
  margin: 2px 0;
  display: inline-block;
}

.operating-cost {
  background: #e8f5e8;
  padding: 2px 6px;
  border-radius: 2px;
  font-size: 11px;
  margin: 2px 0;
  display: inline-block;
  color: #2e7d32;
  font-weight: bold;
}

.component-item-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.expand-arrow {
  font-size: 10px;
  color: #6c757d;
  transition: transform 0.2s ease;
  cursor: pointer;
}

.expand-arrow.expanded {
  transform: rotate(180deg);
}

#main-container {
  flex: 1;
  position: relative;
  display: flex;
  flex-direction: column;
}

#toggle-sidebar {
  position: absolute;
  top: 10px;
  left: 10px;
  z-index: 1000;
  background: #343a40;
  color: white;
  border: none;
  padding: 10px 12px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 14px;
}

#toggle-sidebar:hover {
  background: #495057;
}

#graphDiv {
  flex: 1;
  position: relative;
}

#mySvgId {
  height: 100%;
  width: 100%;
}

/* Tooltip Styles */
.component-tooltip {
  position: fixed;
  background: rgba(0, 0, 0, 0.95);
  color: white;
  padding: 12px;
  border-radius: 8px;
  font-size: 12px;
  line-height: 1.3;
  max-width: 320px;
  min-width: 200px;
  max-height: 400px;
  overflow-y: auto;
  z-index: 10000;
  pointer-events: none;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
  border: 1px solid #555;
  opacity: 0;
  transition: opacity 0.15s ease-in-out;
  word-wrap: break-word;
  backdrop-filter: blur(2px);
}

.component-tooltip.visible {
  opacity: 1;
}

.tooltip-title {
  font-weight: bold;
  color: #4fc3f7;
  margin-bottom: 6px;
  font-size: 13px;
}

.tooltip-desc {
  color: #e0e0e0;
  margin-bottom: 8px;
}

.tooltip-cost {
  background: #1b5e20;
  padding: 4px 8px;
  border-radius: 3px;
  margin-bottom: 6px;
  color: #a5d6a7;
  font-size: 11px;
}

.tooltip-status {
  display: inline-block;
  padding: 2px 6px;
  border-radius: 2px;
  font-size: 10px;
  font-weight: bold;
  text-transform: uppercase;
}

.tooltip-status.operational {
  background: #2e7d32;
  color: #c8e6c9;
}

.tooltip-status.maintenance {
  background: #f57c00;
  color: #fff3e0;
}

.tooltip-status.critical {
  background: #c62828;
  color: #ffcdd2;
}

/* ── Mobile / Touch Responsive Styles ── */

/* Touch-positioned tooltip: bottom sheet on small screens */
.component-tooltip.touch-positioned {
  left: 10px !important;
  right: 10px !important;
  bottom: 10px !important;
  top: auto !important;
  width: auto !important;
  max-width: none !important;
  transform: none !important;
  pointer-events: auto;
  max-height: 50vh;
}

/* Overlay that dims the graph when the sidebar is open on mobile */
#sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 450;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

#sidebar-overlay.visible {
  display: block;
}

@media (max-width: 768px) {
  /* Sidebar becomes a full-height slide-in drawer */
  #sidebar {
    position: fixed;
    left: 0;
    top: 0;
    height: 100%;
    z-index: 500;
    width: min(85vw, 300px);
    transform: translateX(0);
    margin-left: 0 !important;
    transition: transform 0.3s ease;
    box-shadow: 4px 0 16px rgba(0, 0, 0, 0.3);
  }

  #sidebar.collapsed {
    transform: translateX(-100%);
    margin-left: 0 !important;
  }

  /* Toggle button always floats above everything */
  #toggle-sidebar {
    position: fixed;
    top: 10px;
    left: 10px;
    z-index: 600;
    min-height: 44px;
    min-width: 44px;
    padding: 10px 14px;
    font-size: 15px;
    touch-action: manipulation;
  }

  /* Main container fills the whole viewport */
  #main-container {
    width: 100vw;
  }

  /* Sidebar header bigger padding */
  #sidebar-header {
    padding: 16px;
    font-size: 15px;
  }

  /* Category titles: bigger touch targets */
  .category-title {
    padding: 12px;
    font-size: 14px;
    min-height: 44px;
    display: flex;
    align-items: center;
  }

  /* Component items: bigger touch targets */
  .component-item {
    padding: 10px 12px;
    font-size: 14px;
    min-height: 44px;
    display: flex;
    align-items: center;
  }

  .component-item-header {
    width: 100%;
  }

  /* Expand arrow bigger tap area */
  .expand-arrow {
    font-size: 13px;
    padding: 8px;
    margin: -8px;
  }

  /* Tooltip on mobile: slightly larger text */
  .component-tooltip {
    font-size: 13px;
  }

  .tooltip-title {
    font-size: 14px;
  }
}

@media (max-width: 480px) {
  /* Phone-sized: even larger font for readability */
  .category-title,
  .component-item {
    font-size: 15px;
  }

  #sidebar-header {
    font-size: 16px;
  }
}