* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background: #111827;
  color: #f3f4f6;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  min-height: 100vh;
}

.mod-tree-container {
  max-width: 95vw;
  margin: 0 auto;
  padding: 20px;
  position: relative;
}

/* --- Header & Breadcrumbs --- */

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  gap: 12px;
  flex-wrap: wrap;
}

.site-title {
  font-size: 1.5rem;
  font-weight: bold;
  color: #f3f4f6;
  text-decoration: none;
  transition: color 0.3s ease;
}

.site-title:hover {
  color: #fbbf24;
}

.header-buttons {
  display: flex;
  gap: 0.5rem;
}

.header-btn {
  background-color: #374151;
  color: white;
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.375rem 0.75rem;
  border-radius: 0.25rem;
  border: none;
  cursor: pointer;
  transition: background-color 0.2s;
}

.header-btn:hover {
  background-color: #4b5563;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  margin-bottom: 24px;
}

.breadcrumb a {
  color: #60a5fa;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 4px;
  transition: color 0.2s ease;
}

.breadcrumb a:hover {
  color: #93c5fd;
}

.breadcrumb-separator {
  color: #9ca3af;
}

.page-title {
  font-size: 2rem;
  font-weight: bold;
  text-align: center;
  margin-bottom: 12px;
  color: #fbbf24;
}

.page-subtitle {
  text-align: center;
  color: #f3f4f6;
  margin-bottom: 4px;
  font-size: 1rem;
}

.page-description {
  text-align: center;
  color: #9ca3af;
  margin-bottom: 24px;
  font-size: 0.875rem;
}

/* --- Tree Container & Background --- */

.flowchart-wrapper {
  overflow: hidden;
  padding: 40px 0;
  cursor: grab;
  position: relative;
  background: radial-gradient(circle at center, #1f2937 0%, #111827 70%);
  border-radius: 8px;
  border: 1px solid #374151;
  box-shadow: inset 0 0 20px rgba(0,0,0,0.5);
}

.flowchart-wrapper:active {
  cursor: grabbing;
}

.flowchart-wrapper::-webkit-scrollbar {
  display: none;
}

.flowchart-wrapper {
  -ms-overflow-style: none;
  scrollbar-width: none;
}

.flowchart-container {
  display: grid;
  grid-template-columns: repeat(3, 320px);
  gap: 60px;
  justify-content: center;
  /* UPDATED: Slower transition for fluid panning and correct origin for zoom */
  transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  transform-origin: center top; 
  user-select: none;
  padding: 20px;
}

.base-column {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
}

.flow-branch {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  position: relative;
  flex: 0 0 auto;
  width: 100%;
}

/* --- Connectors --- */
.branch-connector {
  width: 2px;
  height: 25px;
  background: #6b7280;
  margin: 4px 0;
  align-self: center;
}

.branch-connector.left-aligned {
  align-self: flex-start;
  margin-left: 20px;
  height: 20px;
  margin-top: 5px;
  margin-bottom: 0;
}

.children-row {
  display: flex;
  flex-direction: column;
  gap: 15px;
  margin-top: 5px;
  width: 100%;
  align-items: center;
}

.hierarchical-children {
  display: flex;
  flex-direction: column;
  gap: 15px;
  margin-top: 0;
  width: 100%;
  position: relative;
  padding-left: 40px;
  align-items: stretch;
}

.hierarchical-item {
  position: relative;
  display: flex;
  flex-direction: column;
  width: 100%;
}

/* Tree Lines - REWRITTEN FOR CONSISTENCY AND OVERSHOOT FIX */

/* Remove the old parent-based vertical line */
.hierarchical-children::before {
  content: none;
}

/* New Item-based Vertical Line */
.hierarchical-item::after {
  content: '';
  position: absolute;
  left: -20px; /* Aligns with padding-left of container (40px) - 20px = 20px global offset */
  width: 2px;
  background: #6b7280;
  /* Start -15px up to bridge the flex-gap (15px) from the previous sibling/connector */
  top: -15px; 
  /* Height covers the gap above (15px) + the full body of this item */
  height: calc(100% + 15px);
}

/* Horizontal Line (The "Elbow" connector) */
.hierarchical-item::before {
  content: '';
  position: absolute;
  left: -20px;
  top: 24px; /* Approx middle of card header */
  width: 20px;
  height: 2px;
  background: #6b7280;
}

/* Special handling for the last child to create the perfect "L" shape */
.hierarchical-item:last-child::after {
  /* Stop the vertical line exactly at the horizontal connector level */
  /* Calculation: 15px (gap above) + 24px (distance to elbow) + small overlap (2px) = 41px */
  height: 41px;
}

.flow-branch:has(.hierarchical-children) {
  align-items: flex-start;
}

.flow-branch:has(.hierarchical-children) > .mod-card {
  margin-left: 0;
}

/* --- Mod Cards --- */
.mod-card {
  background: #1f2937;
  border: 1px solid #4b5563;
  border-left: 4px solid #4b5563;
  border-radius: 6px;
  padding: 12px 14px;
  width: 100%;
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
  box-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.mod-card:hover {
  border-color: #6b7280;
  border-left-color: #fbbf24;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0,0,0,0.4);
}

.mod-card.search-match {
  border: 2px solid #fbbf24;
  box-shadow: 0 0 15px rgba(251, 191, 36, 0.4);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(251, 191, 36, 0.4); }
  70% { box-shadow: 0 0 0 10px rgba(251, 191, 36, 0); }
  100% { box-shadow: 0 0 0 0 rgba(251, 191, 36, 0); }
}

.mod-card.expanded {
  background: #2d3748;
  border-color: #6b7280;
  border-left-color: #fbbf24;
}

/* Types */
.mod-card.base-game {
  border-left-color: #10b981;
  background: #064e3b;
}
.mod-card.base-game.expanded { background: #065f46; }

.mod-card.engine-family {
  border-left-color: #8b5cf6;
  background: #4c1d95;
}
.mod-card.engine-family.expanded { background: #5b21b6; }

.mod-card.platform-family {
  border-left-color: #0ea5e9;
  background: #1e3a8a;
}
.mod-card.platform-family.expanded { background: #1e40af; }


.mod-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}

.mod-title {
  font-size: 15px;
  font-weight: 700;
  color: #f9fafb;
  flex: 1;
  letter-spacing: 0.01em;
}

.mod-badges {
  display: flex;
  gap: 4px;
  align-items: center;
}

.expand-icon {
  width: 18px;
  height: 18px;
  color: #fbbf24;
  transition: transform 0.3s ease;
  order: -1;
  flex-shrink: 0;
}

.expand-icon.rotated {
  transform: rotate(180deg);
}

.mod-badge {
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 4px;
  white-space: nowrap;
  font-weight: 600;
  text-transform: uppercase;
}

/* Badge Colors */
.badge-freeplay { background: #172554; color: #93c5fd; border: 1px solid #1e40af; }
.badge-overhaul { background: #451a03; color: #fdba74; border: 1px solid #9a3412; }
.badge-story { background: #064e3b; color: #6ee7b7; border: 1px solid #059669; }
.badge-soup { background: #422006; color: #fde047; border: 1px solid #ca8a04; }
.badge-modpack { background: #831843; color: #f9a8d4; border: 1px solid #db2777; }
.badge-engine { background: #4c1d95; color: #d8b4fe; border: 1px solid #7c3aed; }
.badge-bugfixes { background: #881337; color: #fda4af; border: 1px solid #be123c; }
.badge-vanillaplus { background: #713f12; color: #fef08a; border: 1px solid #ca8a04; }

.mod-details {
  height: 0;
  overflow: hidden;
  opacity: 0;
  transition: all 0.3s ease;
}

.mod-details.expanded {
  opacity: 1;
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid #4b5563;
}

.mod-description {
  font-size: 12.5px;
  color: #d1d5db;
  line-height: 1.5;
  margin-bottom: 8px;
}

.mod-links {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

.mod-link {
  display: inline-block;
  font-size: 11px;
  color: #fbbf24;
  text-decoration: none;
  font-weight: 600;
  margin-top: 4px;
}
.mod-link:hover { text-decoration: underline; color: #fcd34d; }

/* --- Controls Bar --- */
.controls-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 15px;
  background: #1f2937;
  border: 1px solid #374151;
  border-radius: 8px;
  padding: 10px 15px;
  margin-bottom: 20px;
  flex-wrap: wrap;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.search-container {
  position: relative;
  display: flex;
  align-items: center;
}

#modSearchInput {
  background: #111827;
  border: 1px solid #4b5563;
  color: #f3f4f6;
  padding: 8px 12px;
  padding-right: 70px;
  border-radius: 4px;
  font-size: 13px;
  width: 220px;
  height: 34px;
  outline: none;
  transition: border-color 0.2s;
}

#modSearchInput:focus {
  border-color: #fbbf24;
}

.search-enter-btn {
  position: absolute;
  right: 34px;
  top: 50%;
  transform: translateY(-50%);
  background: #fbbf24;
  border: none;
  color: #111827;
  cursor: pointer;
  font-size: 12px;
  padding: 5px 8px;
  height: 24px;
  border-radius: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.2s;
  font-weight: 600;
}

.search-enter-btn:hover {
  background: #fcd34d;
}

.search-enter-btn svg {
  display: block;
}

.clear-search {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: #9ca3af;
  cursor: pointer;
  font-size: 14px;
  padding: 4px 6px;
  height: 24px;
  width: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.clear-search:hover {
  color: #f3f4f6;
}

.zoom-controls {
  display: flex;
  align-items: center;
  gap: 5px;
  background: #111827;
  border-radius: 4px;
  padding: 2px;
  border: 1px solid #4b5563;
}

.zoom-button {
  background: #374151;
  border: none;
  width: 24px;
  height: 24px;
  border-radius: 3px;
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
}
.zoom-button:hover:not(:disabled) { background: #4b5563; }
.zoom-button:disabled { opacity: 0.5; cursor: not-allowed; }

.zoom-indicator {
  font-size: 11px;
  min-width: 40px;
  text-align: center;
  font-variant-numeric: tabular-nums;
}

.view-controls {
  display: flex;
  gap: 8px;
}

.control-button {
  background: #374151;
  border: 1px solid #4b5563;
  border-radius: 4px;
  padding: 6px 12px;
  font-size: 11px;
  color: #e5e7eb;
  cursor: pointer;
  font-weight: 600;
  text-transform: uppercase;
  transition: all 0.2s;
}

.control-button:hover {
  background: #4b5563;
  border-color: #6b7280;
  color: #fff;
}

.control-button.active {
  background: #059669;
  border-color: #10b981;
  color: white;
}

/* Subtle yellow highlight for Full View button - always visible */
#toggleAllBtn {
  box-shadow: 0 0 8px rgba(251, 191, 36, 0.3);
  border-color: rgba(251, 191, 36, 0.4);
}

#toggleAllBtn:hover {
  box-shadow: 0 0 12px rgba(251, 191, 36, 0.5);
  border-color: rgba(251, 191, 36, 0.6);
}

/* Remove highlight when active (feature already used) */
#toggleAllBtn.active {
  box-shadow: none;
  border-color: #10b981;
}

.hidden { display: none !important; }

/* Responsive */
@media (max-width: 968px) {
  .flowchart-container {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .controls-bar {
    flex-direction: column;
    align-items: stretch;
  }
  #modSearchInput { width: 100%; }
  .view-controls { justify-content: center; }
  .zoom-controls { justify-content: center; margin: 5px 0; }
  .page-header {
    flex-direction: column;
    align-items: flex-start;
  }
}