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/* Navigation back to Thomas’s benchmark index. */
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/* A single scrollable line keeps derivations compact on narrow screens. */
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.proof-citations{display:inline-flex;gap:5px;font-size:10px;color:var(--teal)}
.pair-score-row{display:flex;align-items:baseline;justify-content:space-between;gap:10px;margin-top:7px}
.pair-score-row strong{font-weight:600;color:var(--ink);font-variant-numeric:tabular-nums;text-align:right}

.pair-operator sup{font-size:.55em;line-height:0;vertical-align:super;margin-left:1px}

/* Preview the consequences of one resolution. */
.pair-score-row .score-preview{border:0;border-radius:2px;background:transparent;padding:0 2px;margin:0 -2px;font-size:inherit;line-height:inherit;font-weight:600;color:var(--ink);font-variant-numeric:tabular-nums;text-align:right;white-space:nowrap}
.pair-score-row .score-preview:hover,.pair-score-row .score-preview:focus-visible{text-decoration:underline;text-underline-offset:3px;color:var(--consequence-text)}
.pair-score-row .score-preview[aria-pressed="true"]{color:var(--consequence-text);background:var(--consequence-tint);text-decoration:underline;text-underline-offset:3px}
.matrix-cell.consequence-preview{background:var(--consequence)!important;box-shadow:inset 0 0 0 1px var(--consequence-edge)!important}
.matrix-scroll{scroll-padding-block-start:96px;scroll-padding-inline-start:96px}

/* Inclusion diagram and the alternate matrix share one selected pair. */
.relationship-visual{min-width:0}
.relationship-layout{grid-template-columns:minmax(0,1fr) 280px}
.relationship-layout>.pair-panel{position:sticky;top:24px}
.view-switch{display:flex;border:1px solid var(--line);border-radius:6px;padding:3px;gap:3px;flex-shrink:0}
.view-switch button{border:0;background:transparent;padding:7px 14px;font-size:12px;color:var(--muted)}
.view-switch button[aria-selected="true"]{background:var(--paper);color:var(--ink);box-shadow:0 1px 3px #00000015}
.diagram-card{border:1px solid var(--line);border-radius:7px;background:var(--paper);overflow:hidden}
.diagram-toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 16px 8px}
.selection-target,.diagram-zoom{display:flex;gap:4px;align-items:center}
.diagram-toolbar button{font-size:11px;padding:5px 9px;min-height:32px}
.selection-target button{color:var(--muted);border-color:transparent;background:transparent}
.selection-target button[aria-pressed="true"]{color:var(--ink);background:var(--cream);border-color:var(--line)}
.diagram-zoom button{border-color:transparent;background:transparent;min-width:30px}
.diagram-instruction{font-size:10px;color:var(--muted);padding:0 16px 10px;margin:0;border-bottom:1px solid var(--line)}
.diagram-scroll{height:690px;max-height:80vh;min-height:440px;overflow:auto;overscroll-behavior:contain;scrollbar-width:thin;position:relative;cursor:grab;background:var(--cream)}
.diagram-scroll.dragging{cursor:grabbing;user-select:none}
.diagram-surface{position:relative;margin:auto}
.diagram-canvas{position:absolute;top:0;left:0;transform-origin:0 0}
.diagram-lines{position:absolute;inset:0;width:100%;height:100%;overflow:visible}
.diagram-edge{fill:none;stroke:var(--muted);stroke-opacity:.32;stroke-width:1.35;stroke-linejoin:round}
.diagram-edge.on-path{stroke:var(--teal);stroke-opacity:1;stroke-width:3}
.diagram-node{position:absolute;display:flex;align-items:center;justify-content:center;padding:0 4px;border:1px solid var(--line);border-radius:5px;background:var(--paper);color:var(--ink);font-family:var(--mono);font-size:13px;font-weight:500;line-height:1;white-space:nowrap;cursor:pointer;box-shadow:0 1px 2px #00000008}
.diagram-node:hover{border-color:var(--teal);box-shadow:0 0 0 2px var(--line);z-index:3}
.diagram-node.on-path{border-color:var(--teal)}
.diagram-node.affected{background:var(--consequence-tint);border-color:var(--consequence-edge);box-shadow:0 0 0 2px var(--consequence-tint)}
.diagram-node.selected-a,.diagram-node.selected-b{border-color:var(--teal);box-shadow:0 0 0 2px var(--teal);z-index:2;font-weight:700}
.node-selection{position:absolute;top:-11px;right:-5px;padding:2px 4px;border-radius:3px;background:var(--teal);color:var(--paper);font:600 9px/1.1 var(--sans);min-width:14px;text-align:center}
.node-selection:empty{display:none}
.diagram-node:focus-visible{outline:3px solid var(--gold);outline-offset:5px;z-index:4}
.diagram-footer{display:flex;align-items:center;justify-content:space-between;gap:12px;border-top:1px solid var(--line);padding:12px 16px;min-height:54px;font-size:10px;line-height:1.5;color:var(--muted)}
.diagram-footer button{font-size:10px;flex-shrink:0;padding:0}
@media(max-width:1000px){.relationship-layout{grid-template-columns:minmax(0,1fr) 245px}.diagram-toolbar{padding:10px 12px 8px;gap:5px}.diagram-toolbar button{padding:5px 7px}}
@media(max-width:820px){.relationship-layout{grid-template-columns:minmax(0,1fr)}.relationship-layout>.pair-panel{position:static}.diagram-scroll{height:620px}.view-switch button{padding:6px 11px}}
@media(max-width:520px){#frontier>.section-heading{align-items:flex-start;flex-direction:column;gap:16px}.diagram-toolbar{flex-wrap:wrap}.diagram-scroll{height:520px;min-height:400px;max-height:70vh}.diagram-footer{align-items:flex-start;flex-direction:column;gap:6px}.diagram-node{font-size:13px}.diagram-toolbar button{min-height:36px}.view-switch button{min-height:36px}}