.plotcat {
  --plotcat-border: color-mix(in srgb, var(--bs-body-color, #212529) 20%, var(--bs-body-bg, #ffffff));
  --plotcat-accent: var(--bs-primary, #0d6efd);
  --plotcat-accent-rgb: var(--bs-primary-rgb, 13, 110, 253);
  --plotcat-bg: var(--bs-body-bg, #ffffff);
  --plotcat-nested-bg: color-mix(in srgb, var(--bs-body-color, #212529) 6%, var(--bs-body-bg, #ffffff));
  --plotcat-shadow-color: rgb(var(--bs-emphasis-color-rgb, 0, 0, 0));
  
  border: 1px solid var(--plotcat-border);
  border-radius: 0.75rem;
  margin-block: 2rem;
  padding: 1.25rem;
  color: var(--bs-body-color, #212529);
  background: var(--plotcat-bg);
  box-shadow: 0 4px 12px color-mix(in srgb, var(--plotcat-shadow-color) 3%, transparent);
  font-family: var(--bs-body-font-family, system-ui, -apple-system, sans-serif);
}

.plotcat__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 600;
  font-size: 1.1rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--plotcat-border);
  padding-bottom: 0.75rem;
}

.plotcat__score {
  font-size: 0.9rem;
  background: rgb(var(--plotcat-accent-rgb) / 10%);
  color: var(--plotcat-accent);
  padding: 0.25rem 0.75rem;
  border-radius: 2rem;
  font-weight: 700;
}

.plotcat__body {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-bottom: 1rem;
}

.plotcat__plot {
  min-height: 14rem;
  margin: 0;
  border: 1px solid var(--plotcat-border);
  border-radius: 0.5rem;
  overflow: hidden;
  background: var(--plotcat-bg);
  box-shadow: inset 0 2px 4px color-mix(in srgb, var(--plotcat-shadow-color) 2%, transparent);
  display: flex;
  align-items: center;
  justify-content: center;
}

.plotcat__plot > svg {
  display: block;
  width: 100%;
  height: auto;
  max-height: 100%;
}

.js-plotly-plot,
.js-plotly-plot .plot-container,
.js-plotly-plot .svg-container {
  width: 100% !important;
  height: 100% !important;
}

.plotcat-editor-container {
  position: relative;
  width: 100%;
  height: 12rem;
  margin-block: 0.5rem 1rem;
  border: 1px solid var(--plotcat-border);
  border-radius: 0.5rem;
  background: var(--plotcat-nested-bg);
  overflow: hidden;
  transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.plotcat-editor-container:focus-within {
  border-color: var(--plotcat-accent);
  box-shadow: 0 0 0 0.25rem rgb(var(--plotcat-accent-rgb) / 25%);
  outline: 0;
}

.plotcat__textarea,
.plotcat-highlight-overlay {
  margin: 0;
  padding: 0.75rem;
  width: 100%;
  height: 100%;
  font-family: var(--bs-font-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace);
  font-size: 0.9rem;
  line-height: 1.5;
  tab-size: 4;
  white-space: pre-wrap;
  word-wrap: break-word;
  box-sizing: border-box;
}

.plotcat__textarea {
  position: absolute;
  top: 0;
  left: 0;
  background: transparent !important;
  color: transparent !important;
  caret-color: var(--bs-body-color, #212529);
  resize: none;
  border: none;
  outline: none;
  z-index: 2;
  overflow-y: auto;
}

.plotcat-highlight-overlay {
  position: absolute;
  top: 0;
  left: 0;
  color: var(--bs-body-color, #212529);
  z-index: 1;
  pointer-events: none;
  overflow-y: auto;
  scrollbar-width: none;
}

.plotcat-highlight-overlay::-webkit-scrollbar {
  display: none;
}

/* Syntax Highlighting Colors */
.plotcat-hl-keyword {
  color: var(--plotcat-accent, #0d6efd);
  font-weight: 600;
}
.plotcat-hl-string {
  color: var(--bs-success-text-emphasis, var(--bs-success, #198754));
}
.plotcat-hl-number {
  color: var(--bs-info-text-emphasis, var(--bs-info, #0dcaf0));
}
.plotcat-hl-comment {
  color: var(--bs-secondary-color, #6c757d);
  font-style: italic;
}
.plotcat-hl-function {
  color: var(--bs-code-color, #d63384);
}

.plotcat__actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  border-top: 1px solid var(--plotcat-border);
  padding-top: 1rem;
  margin-top: 1rem;
}

.plotcat__button {
  padding: 0.45rem 1rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--bs-body-bg, #ffffff);
  background: var(--plotcat-accent);
  border: 1px solid var(--plotcat-accent);
  border-radius: 0.375rem;
  cursor: pointer;
  transition: all 0.15s ease-in-out;
}

.plotcat__button:hover {
  background: color-mix(in srgb, var(--plotcat-accent) 85%, var(--bs-emphasis-color, #000000));
  border-color: color-mix(in srgb, var(--plotcat-accent) 85%, var(--bs-emphasis-color, #000000));
}

.plotcat__button:disabled {
  opacity: 0.65;
  cursor: not-allowed;
}

.plotcat :focus-visible {
  outline: 3px solid rgb(var(--plotcat-accent-rgb) / 50%);
  outline-offset: 2px;
}

/* Premium Segmented Compare Control */
.plotcat__compare {
  display: flex;
  align-items: center;
  border: none;
  margin: 0;
  padding: 0;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.plotcat__compare-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--bs-secondary-color, color-mix(in srgb, var(--bs-body-color, #212529) 60%, transparent));
  font-weight: 700;
  margin: 0;
  padding: 0;
}

.plotcat__compare-options {
  display: inline-flex;
  background: var(--plotcat-nested-bg);
  padding: 0.2rem;
  border-radius: 0.375rem;
  border: 1px solid var(--plotcat-border);
  gap: 0.125rem;
}

.plotcat__compare label {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 0.35rem 0.75rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--bs-secondary-color, color-mix(in srgb, var(--bs-body-color, #212529) 65%, transparent));
  border-radius: 0.25rem;
  cursor: pointer;
  user-select: none;
  transition: all 0.15s ease-in-out;
}

.plotcat__compare label:hover {
  color: var(--bs-body-color, #212529);
  background: color-mix(in srgb, var(--bs-body-color, #000) 8%, transparent);
}

.plotcat__compare label:has(input:checked) {
  background: var(--plotcat-accent);
  color: var(--bs-body-bg, #ffffff);
  box-shadow: 0 1px 3px color-mix(in srgb, var(--plotcat-shadow-color) 15%, transparent);
}

.plotcat__compare label input[type="radio"] {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
  margin: 0;
  padding: 0;
}

.plotcat__compare label:has(input:disabled) {
  cursor: not-allowed;
  opacity: 0.5;
}

.plotcat__compare label:has(input:disabled) input[type="radio"] {
  cursor: not-allowed;
}

.plotcat__status {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--bs-secondary-color, #6c757d);
  margin-top: 0.75rem;
  display: none;
}

.plotcat__feedback {
  font-size: 0.85rem;
  color: var(--bs-secondary-color, #6c757d);
  margin-top: 0.5rem;
  line-height: 1.4;
  display: none;
}

.plotcat--error .plotcat__status {
  display: block !important;
  color: var(--bs-danger, #dc3545) !important;
  font-weight: 600;
}

.CodeMirror {
  height: 100% !important;
  font-family: var(--bs-font-monospace, monospace);
  font-size: 0.9rem;
}

textarea.plotcat__textarea {
  display: block !important;
  opacity: 0 !important;
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  border: 0 !important;
  pointer-events: none !important;
  overflow: hidden !important;
}

.plotcat--complete .plotcat__score {
  background: hsla(var(--plotcat-score-hue, 120), 85%, 50%, 0.1);
  color: hsl(var(--plotcat-score-hue, 120), 100%, 35%) !important;
  border: 1px solid hsla(var(--plotcat-score-hue, 120), 85%, 50%, 0.2);
}

/* Layout modes */
.plotcat--overlay .plotcat__body,
.plotcat--wipe .plotcat__body {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.plotcat--overlay .plotcat__plot,
.plotcat--wipe .plotcat__plot {
  grid-area: 1 / 1;
}

.plotcat--overlay .plotcat__student {
  opacity: 0.5;
}

.plotcat--wipe .plotcat__student {
  clip-path: inset(0 calc(100% - var(--plotcat-wipe, 50%)) 0 0);
}

.plotcat__wipe-handle {
  display: none;
  position: absolute;
  z-index: 3;
  top: 0;
  bottom: 0;
  left: var(--plotcat-wipe, 50%);
  width: 1.25rem;
  padding: 0;
  border: 0;
  transform: translateX(-50%);
  color: var(--plotcat-accent);
  background: transparent;
  cursor: ew-resize;
  touch-action: none;
}

.plotcat--wipe .plotcat__wipe-handle {
  display: block;
}

.plotcat__wipe-handle::before,
.plotcat__wipe-handle::after {
  position: absolute;
  left: 50%;
  content: "";
  transform: translate(-50%, -50%);
}

.plotcat__wipe-handle::before {
  top: 50%;
  width: 2px;
  height: 100%;
  background: color-mix(in srgb, var(--plotcat-accent) 80%, var(--bs-body-color, #212529));
}

.plotcat__wipe-handle::after {
  top: 50%;
  width: 0.7rem;
  height: 1.4rem;
  border: 2px solid var(--plotcat-accent);
  border-radius: var(--bs-border-radius-pill, 50rem);
  background: var(--plotcat-nested-bg);
  box-shadow: 0 1px 4px color-mix(in srgb, var(--plotcat-shadow-color) 20%, transparent);
}

.plotcat__wipe-handle:hover::after,
.plotcat__wipe-handle:focus-visible::after {
  background: color-mix(in srgb, var(--plotcat-accent) 12%, var(--plotcat-nested-bg));
  box-shadow: 0 0 0 0.2rem rgb(var(--plotcat-accent-rgb) / 25%);
}

.plotcat .plotcat__wipe-handle:focus-visible {
  outline: none;
}

@media (max-width: 48rem) {
  .plotcat__body {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .plotcat * {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}