body {
  font-family: var(--bs-body-font-family, 'Segoe UI', Arial, sans-serif);
  background-color: var(--bs-dark);
  color: var(--bs-light);
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bs-dark-bg-subtle);
  padding: 0.5em 2em;
  border-bottom: 2px solid var(--bs-secondary-bg);
}

header h1 {
  font-size: 1.5em;
  margin: 0;
  color: var(--bs-light);
}

main {
  display: flex;
  flex-direction: row;
  min-height: 80vh;
}

.sidebar {
  width: 200px;
  background: var(--bs-dark-bg-subtle);
  padding: 1em;
  border-right: 2px solid var(--bs-secondary-bg);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.help-text {
  margin-top: 1em;
  font-size: 0.95em;
  color: var(--bs-secondary);
}

.previews {
  flex: 1 1 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding: 1.5em 1em 1em 1em;
  min-width: 320px;
}

.preview-panel {
  background: var(--bs-dark-bg-subtle);
  border: 1px solid var(--bs-secondary-bg);
  border-radius: 8px;
  margin-bottom: 1.5em;
  padding: 1em;
  width: 320px;
  box-shadow: 0 2px 8px #0002;
  text-align: center;
}

.preview-panel h2 {
  margin-top: 0;
  font-size: 1.1em;
  color: var(--bs-secondary);
}

#flat-preview {
  width: 192px;
  height: 192px;
  image-rendering: pixelated;
  border: 1px solid var(--bs-secondary-bg);
  background: var(--bs-dark);
  margin: 0.5em 0;
}

#skinview3d-container {
  width: 192px;
  height: 256px;
  background: var(--bs-dark);
  border: 1px solid var(--bs-secondary-bg);
  border-radius: 4px;
  margin: 0.5em auto;
}

.layers-panel {
  max-width: 333px;
  min-width: 260px;
  background: var(--bs-dark-bg-subtle);
  border-left: 2px solid var(--bs-secondary-bg);
  padding: 1em 1em 1em 1em;
  display: flex;
  flex-direction: column;
  align-items: stretch;
}

.layers-panel h2 {
  margin-top: 0;
  font-size: 1.1em;
  color: var(--bs-secondary);
}

#layers-list {
  list-style: none;
  padding: 0;
  margin: 0 0 1em 0;
  min-height: 120px;
}

.layer-item {
  display: flex;
  align-items: center;
  background: var(--bs-dark);
  border: 1px solid var(--bs-secondary-bg);
  border-radius: 4px;
  margin-bottom: 0.5em;
  padding: 0.3em 0.5em;
  cursor: grab;
  transition: background 0.2s;
}

.layer-item.selected {
  border: 2px solid var(--bs-primary);
  background: var(--bs-primary-bg-subtle);
}

.layer-thumb {
  width: 32px;
  height: 32px;
  margin-right: 0.7em;
  border-radius: 2px;
  border: 1px solid var(--bs-secondary-bg);
  background: var(--bs-dark-bg-subtle);
  image-rendering: pixelated;
}

.layer-name {
  flex: 1 1 0;
  font-size: 1em;
  color: var(--bs-light);
  margin-right: 0.5em;
}

.layer-actions {
  display: flex;
  align-items: center;
  gap: 0.3em;
}

.layer-action-btn {
  background: none;
  border: none;
  color: var(--bs-secondary);
  font-size: 1.1em;
  cursor: pointer;
  padding: 0.2em 0.3em;
  border-radius: 2px;
  transition: background 0.2s;
}

.layer-action-btn:hover {
  background: var(--bs-secondary-bg);
  color: var(--bs-light);
}

.layer-props {
  background: var(--bs-dark);
  border: 1px solid var(--bs-secondary-bg);
  border-radius: 4px;
  margin-top: 1em;
  padding: 0.7em;
  text-align: center;
}

.layer-props img {
  width: 48px;
  height: 48px;
  image-rendering: pixelated;
  border: 1px solid var(--bs-secondary-bg);
  background: var(--bs-dark-bg-subtle);
  margin-bottom: 0.5em;
}

.library-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(20,22,30,0.92);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.library-content {
  background: var(--bs-dark-bg-subtle);
  border-radius: 8px;
  padding: 2em 2em 1.5em 2em;
  min-width: 340px;
  box-shadow: 0 4px 32px #0008;
  position: relative;
}

#library-close {
  position: absolute;
  top: 1em; right: 1em;
  background: none;
  border: none;
  color: var(--bs-light);
  font-size: 2em;
  cursor: pointer;
  line-height: 1;
}

.library-controls {
  margin-bottom: 1em;
}

.library-list {
  display: grid;
  grid-template-columns: repeat(5, 1fr); /* 5 columns */
  gap: 1em;
  margin-top: 1em;
  justify-items: center;
  align-items: start;
}

.library-list-scrollbox {
  max-height: 340px;
  overflow-y: auto;
  border: 1px solid var(--bs-secondary-bg);
  border-radius: 6px;
  background: var(--bs-dark-bg-subtle);
  padding: 0.5em;
}

.library-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  cursor: pointer;
  background: var(--bs-dark);
  border-radius: 4px;
  padding: 0.5em 1em;
  border: 1px solid var(--bs-secondary-bg);
  transition: background 0.2s, border 0.2s;
}

.library-item:hover {
  background: var(--bs-primary-bg-subtle);
  border: 1.5px solid var(--bs-primary);
}

.library-item img {
  width: 48px;
  height: 48px;
  image-rendering: pixelated;
  margin-bottom: 0.5em;
  border: 1px solid var(--bs-secondary-bg);
  background: var(--bs-dark-bg-subtle);
  border-radius: 2px;
}

#library-category-select, #library-search {
  font-size: 1em;
  margin-bottom: 0;
}

.message {
  position: fixed;
  left: 50%;
  bottom: 2em;
  transform: translateX(-50%);
  background: var(--bs-primary);
  color: var(--bs-light);
  padding: 0.7em 1.5em;
  border-radius: 4px;
  font-size: 1em;
  z-index: 2000;
  box-shadow: 0 2px 8px #0004;
  min-width: 180px;
  text-align: center;
}

footer {
  background: var(--bs-dark-bg-subtle);
  color: var(--bs-secondary);
  text-align: center;
  padding: 1em 0 0.5em 0;
  font-size: 0.95em;
  border-top: 2px solid var(--bs-secondary-bg);
}

/* Fix message overflow in export/import modal */
.library-content .message {
  position: static !important;
  left: auto !important;
  bottom: auto !important;
  transform: none !important;
  min-width: 0 !important;
  margin-top: 1em;
  box-shadow: none;
}

@media (max-width: 900px) {
  main {
    flex-direction: column;
  }
  .sidebar, .layers-panel {
    width: 100%;
    border: none;
    border-bottom: 2px solid var(--bs-secondary-bg);
    border-top: 2px solid var(--bs-secondary-bg);
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    padding: 0.7em 1em;
  }
  .previews {
    min-width: 0;
    width: 100%;
    flex-direction: row;
    justify-content: center;
    align-items: flex-start;
    gap: 2em;
  }
  .preview-panel {
    width: 160px;
    margin-bottom: 0;
  }
  #skinview3d-container {
    width: 128px;
    height: 170px;
  }
  .library-list-scrollbox {
    max-height: 200px;
  }
  .library-list {
    grid-template-columns: repeat(3, 1fr); /* 3 columns on medium screens */
  }
}

@media (max-width: 600px) {
  header, footer {
    padding-left: 0.5em;
    padding-right: 0.5em;
  }
  .sidebar, .layers-panel {
    padding: 0.5em 0.5em;
    font-size: 0.95em;
  }
  .previews {
    flex-direction: column;
    align-items: center;
    gap: 1em;
  }
  .preview-panel {
    width: 98vw;
    max-width: 320px;
  }
  .library-list {
    grid-template-columns: repeat(2, 1fr); /* 2 columns on small screens */
  }
}