/* Workbook choice controls and threshold-neuron editor share the site tokens. */
.choice-interaction { border: 1px solid var(--color-border-soft); border-radius: var(--radius-sm); padding: var(--space-lg); }
.choice-interaction legend { font-weight: 600; padding-inline: var(--space-sm); }
.choice-interaction label { display: flex; align-items: start; gap: var(--space-sm); margin-block: var(--space-sm); cursor: pointer; }
.choice-interaction input { flex: 0 0 auto; accent-color: var(--color-accent-active); }
.choice-feedback, .neuron-preview { color: var(--color-text-secondary); }
.neuron-editor { display: flex; flex-direction: column; gap: var(--space-md); min-width: 0; padding: var(--space-lg); overflow: auto; }
.neuron-editor h2, .neuron-editor p { margin: 0; }
.neuron-controls { display: flex; flex-wrap: wrap; gap: var(--space-md); align-items: end; }
.neuron-controls label { display: flex; flex-direction: column; gap: var(--space-sm); flex: 1 1 var(--neuron-control-min-width); }
/* Keep control geometry above the shared :root input hover/focus defaults. */
.neuron-editor .neuron-controls input { width: 100%; box-sizing: border-box; font: inherit; padding: var(--space-sm); border: 1px solid var(--color-border-soft); border-radius: var(--radius-sm); background: var(--color-surface-base); color: var(--color-text-primary); }
.neuron-editor .neuron-controls input:focus-visible { outline: 2px solid var(--color-accent-active); outline-offset: 2px; }
.neuron-results { overflow-x: auto; }
.neuron-results table { width: 100%; border-collapse: collapse; }
.neuron-results caption { text-align: start; font-weight: 600; margin-block: var(--space-sm); }
.neuron-results th, .neuron-results td { padding: var(--space-sm); border: 1px solid var(--color-border-soft); text-align: start; }
.neuron-results thead { background: var(--color-surface-muted); }
.neuron-error { color: var(--color-accent-strong); }

/* Answer tables stay inline; wide exercises scroll within the workbook line. */
.answer-table { min-width: 0; max-width: 100%; }
.answer-table__scroll { overflow-x: auto; }
.answer-table table { width: 100%; border-collapse: collapse; }
.answer-table caption { text-align: start; font-weight: 600; margin-block: var(--space-md); }
.answer-table th, .answer-table td { padding: var(--space-sm); border: 1px solid var(--color-border-soft); text-align: start; }
.answer-table thead, .answer-table tbody th { background: var(--color-surface-muted); }
.answer-table .answer-table__scroll input, .answer-table .answer-table__scroll select { box-sizing: border-box; width: 100%; min-width: var(--answer-table-control-min-width); font: inherit; padding: var(--space-sm); border: 1px solid var(--color-border-soft); border-radius: var(--radius-sm); background: var(--color-surface-base); color: var(--color-text-primary); }
.answer-table .answer-table__scroll input:focus-visible, .answer-table .answer-table__scroll select:focus-visible { outline: 2px solid var(--color-accent-active); outline-offset: 2px; }
.answer-table__feedback { color: var(--color-text-secondary); }

.pixel-interaction { min-width: 0; border: 1px solid var(--color-border-soft); border-radius: var(--radius-sm); padding: var(--space-lg); }
.pixel-interaction legend { font-weight: 600; padding-inline: var(--space-sm); }
.pixel-canvases { display: flex; flex-wrap: wrap; gap: var(--space-xl); }
.pixel-grid-scroll { max-width: 100%; overflow-x: auto; }
.pixel-grid { border-collapse: collapse; }
.pixel-grid caption { text-align: start; font-weight: 600; padding-block: var(--space-sm); }
.pixel-grid th { padding: var(--space-sm); }
.pixel-grid td { padding: 0; border: 1px solid var(--color-border-soft); }
/* Keep pixel colors and geometry above shared button hover/focus defaults. */
.pixel-interaction .pixel-grid .pixel-cell { display: flex; align-items: center; justify-content: center; box-sizing: border-box; width: var(--pixel-cell-size); height: var(--pixel-cell-size); border: 0; border-radius: 0; margin: 0; padding: 0; background: var(--color-pixel-off); color: var(--color-text-primary); font: inherit; }
button.pixel-cell { cursor: pointer; }
.pixel-interaction .pixel-grid .pixel-cell--on { background: var(--color-pixel-on); color: var(--color-pixel-on-text); }
.pixel-interaction button.pixel-cell:focus-visible { outline: 2px solid var(--color-accent-active); outline-offset: -2px; }
.pixel-actions { display: flex; flex-wrap: wrap; gap: var(--space-sm); margin-block: var(--space-md); }
.pixel-feedback, .pixel-probe { color: var(--color-text-secondary); }

.square-middle-hash, .sha256-interaction { min-width: 0; border: 1px solid var(--color-border-soft); border-radius: var(--radius-sm); padding: var(--space-lg); }
.square-middle-hash legend, .sha256-interaction legend { font-weight: 600; padding-inline: var(--space-sm); }
.hash-controls { display: flex; flex-wrap: wrap; gap: var(--space-md); align-items: end; }
.hash-controls label { display: flex; flex-direction: column; gap: var(--space-sm); min-width: 0; flex: 1 1 var(--neuron-control-min-width); }
.square-middle-hash .hash-controls input, .sha256-interaction .hash-controls textarea { box-sizing: border-box; width: 100%; min-width: 0; font: inherit; padding: var(--space-sm); border: 1px solid var(--color-border-soft); border-radius: var(--radius-sm); background: var(--color-surface-base); color: var(--color-text-primary); }
.square-middle-hash .hash-controls input:focus-visible, .sha256-interaction .hash-controls textarea:focus-visible { outline: 2px solid var(--color-accent-active); outline-offset: 2px; }
.sha256-interaction .hash-controls textarea { resize: vertical; min-height: 5em; }
.sha256-results table { table-layout: fixed; }
.sha256-results code { display: block; overflow-wrap: anywhere; }
.sha256-difference { color: var(--color-text-secondary); }
.hash-results { overflow-x: auto; }
.hash-results table { width: 100%; border-collapse: collapse; }
.hash-results caption { text-align: start; font-weight: 600; margin-block: var(--space-sm); }
.hash-results th, .hash-results td { padding: var(--space-sm); border: 1px solid var(--color-border-soft); text-align: start; }
.hash-results mark { background: var(--color-background-colored); color: var(--color-text-primary); font-weight: 600; }
.hash-feedback { color: var(--color-text-secondary); }

/* Linked-block editor: statuses have text as well as configurable color accents. */
.blockchain-editor { display: flex; flex-direction: column; gap: var(--space-md); padding: var(--space-lg); min-width: 0; overflow: auto; }
.blockchain-editor h2, .blockchain-editor p { margin: 0; }
.blockchain-actions { display: flex; flex-wrap: wrap; gap: var(--space-sm); }
.blockchain-blocks { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, var(--blockchain-card-min-width)), 1fr)); gap: var(--space-lg); }
.blockchain-block { min-width: 0; padding: var(--space-md); border: 2px solid var(--color-blockchain-invalid); border-radius: var(--radius-sm); }
.blockchain-block--valid { border-color: var(--color-blockchain-valid); }
.blockchain-block label { display: flex; flex-direction: column; gap: var(--space-sm); margin-block: var(--space-md); }
.blockchain-editor .blockchain-block input, .blockchain-editor .blockchain-block textarea { box-sizing: border-box; width: 100%; min-width: 0; padding: var(--space-sm); border: 1px solid var(--color-border-soft); border-radius: var(--radius-sm); font: inherit; background: var(--color-surface-base); color: var(--color-text-primary); }
.blockchain-editor .blockchain-block textarea { min-height: 7em; resize: vertical; }
.blockchain-editor .blockchain-block :is(input, textarea):focus-visible { outline: 2px solid var(--color-accent-active); outline-offset: 2px; }
.blockchain-block dl { margin-block: var(--space-md); }
.blockchain-block dt { font-weight: 600; }
.blockchain-block dd { margin: 0 0 var(--space-md); }
.blockchain-block code { display: block; overflow-wrap: anywhere; }
.blockchain-preview, .blockchain-mining-status { color: var(--color-text-secondary); }
.blockchain-error { color: var(--color-accent-strong); }

/* Local text inspection: no links are rendered or followed. */
.unicode-comparison { min-width: 0; margin-block: var(--space-md); padding: var(--space-md); border: 1px solid var(--color-border-soft); border-radius: var(--radius-sm); }
.unicode-controls { display: flex; flex-wrap: wrap; gap: var(--space-md); align-items: end; }
.unicode-controls label { display: flex; flex: 1 1 var(--unicode-table-min-width); min-width: 0; flex-direction: column; gap: var(--space-sm); }
.unicode-comparison .unicode-controls textarea { box-sizing: border-box; width: 100%; min-width: 0; padding: var(--space-sm); border: 1px solid var(--color-border-soft); border-radius: var(--radius-sm); font: inherit; background: var(--color-surface-base); color: var(--color-text-primary); }
.unicode-comparison .unicode-controls textarea:focus-visible { outline: 2px solid var(--color-accent-active); outline-offset: 2px; }
.unicode-tables { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, var(--unicode-table-min-width)), 1fr)); gap: var(--space-md); }
.unicode-tables table { width: 100%; table-layout: fixed; border-collapse: collapse; }
.unicode-tables th, .unicode-tables td { padding: var(--space-sm); border: 1px solid var(--color-border-soft); text-align: start; overflow-wrap: anywhere; }
.unicode-tables code { unicode-bidi: isolate; }
.unicode-invalid { color: var(--color-accent-strong); }
.unicode-status { color: var(--color-text-secondary); }

/* Learner-authored graphs use SVG coordinates for data and CSS for presentation. */
.coordinate-plot { min-width: 0; margin-block: var(--space-lg); padding: var(--space-md); border: 1px solid var(--color-border-soft); border-radius: var(--radius-sm); }
.coordinate-plot legend { font-weight: 600; }
.coordinate-plot__graph { display: block; width: 100%; max-width: var(--plot-width); height: auto; background: var(--color-surface-base); }
.coordinate-plot__graph text { fill: var(--color-text-primary); font: inherit; font-size: var(--plot-font-size); }
.coordinate-plot__grid { stroke: var(--color-border-soft); stroke-width: 1px; vector-effect: non-scaling-stroke; }
.coordinate-plot__axes { fill: none; stroke: var(--color-text-primary); stroke-width: var(--plot-stroke-width); vector-effect: non-scaling-stroke; }
.coordinate-plot__curve { fill: none; stroke: var(--color-plot-data); stroke-width: var(--plot-stroke-width); vector-effect: non-scaling-stroke; }
.coordinate-plot__point { fill: var(--color-plot-data); r: var(--plot-point-radius); }
.coordinate-plot__tick-x, .coordinate-plot__label-x { text-anchor: middle; }
.coordinate-plot__tick-y { text-anchor: end; }
.coordinate-plot__axis-label { font-weight: 600; }
.coordinate-plot__controls { display: flex; flex-wrap: wrap; gap: var(--space-md); align-items: end; }
.coordinate-plot__controls label { display: flex; flex-direction: column; gap: var(--space-sm); }
.coordinate-plot .coordinate-plot__controls input[type="text"] { width: var(--answer-table-control-min-width); max-width: 100%; box-sizing: border-box; padding: var(--space-sm); border: 1px solid var(--color-border-soft); border-radius: var(--radius-sm); font: inherit; color: var(--color-text-primary); background: var(--color-surface-base); }
.coordinate-plot .coordinate-plot__connect { flex-direction: row; align-items: center; }
.coordinate-plot__connect input { accent-color: var(--color-plot-data); }
.coordinate-plot__table { overflow-x: auto; }
.coordinate-plot table { width: 100%; border-collapse: collapse; }
.coordinate-plot th, .coordinate-plot td { text-align: start; padding: var(--space-sm); border: 1px solid var(--color-border-soft); }
.coordinate-plot thead { background: var(--color-surface-muted); }