.dxt-board{width:100%;min-width:0;color:var(--ink)}.dxt-board h3{margin:12px 0;font-size:18px;line-height:1.75}.dxt-board h4,.dxt-board p,.dxt-board label,.dxt-source-steps{font-size:var(--text-body);line-height:1.85}.dxt-grid{grid-template-columns:repeat(auto-fit,minmax(min(100%,260px),1fr));gap:12px;margin:16px 0;display:grid}.dxt-side,.dxt-domain,.dxt-claim{border:1px solid var(--line);border-radius:var(--radius-small);background:var(--surface);min-width:0;padding:12px}.dxt-domain{margin:16px 0}.dxt-claim{border-style:dashed;border-color:var(--accent)}.dxt-claim strong{font-size:var(--text-body);line-height:1.85}.dxt-claim s{color:var(--emphasis)}.dxt-side h4{margin:0 0 12px}.dxt-side p{margin:12px 0}.dxt-board .dxt-equation{overflow-wrap:anywhere;font-size:22px;font-weight:600;line-height:1.8}.dxt-source-steps{padding:0;list-style:none}.dxt-source-steps li{border:1px solid var(--line);border-radius:var(--radius-small);margin:12px 0;padding:8px}.dxt-lane{min-width:0;height:142px;position:relative}.dxt-before-row{white-space:nowrap;justify-content:center;align-items:flex-start;gap:8px;padding-top:8px;display:flex;position:relative}.dxt-before-row>strong,.dxt-old-constant{font-size:24px;line-height:36px}.dxt-token-position{flex-shrink:0;width:82px;height:100px;display:inline-block;position:relative}.dxt-target-outline,.dxt-origin-outline{border:1px dashed var(--line-strong);border-radius:5px;width:46px;height:36px;position:absolute;left:0}.dxt-target-outline{top:0}.dxt-origin-outline{top:56px}.dxt-moving-token{border:2px solid var(--diagram-first);background:var(--surface);text-align:center;z-index:1;border-radius:5px;width:46px;height:36px;font-size:24px;line-height:32px;transition:none;position:absolute;top:0;left:0}.dxt-direction{width:22px;height:100px;position:absolute;top:0;left:56px;overflow:visible}.dxt-direction line{stroke:var(--diagram-first);stroke-width:2px}.dxt-direction path{fill:var(--diagram-first)}.dxt-reduction{border-top:1px solid var(--line);padding-top:12px}.dxt-result,.dxt-variant{border:1px solid var(--line);border-radius:var(--radius-small);background:var(--surface-soft);padding:12px}.dxt-inputs{grid-template-columns:repeat(auto-fit,minmax(min(100%,200px),1fr));gap:12px;margin:16px 0;display:grid}.dxt-inputs label{gap:6px;display:grid}.dxt-inputs select{font:inherit;max-width:100%;min-height:44px;color:var(--ink);background:var(--surface);border:1px solid var(--line-strong);border-radius:var(--radius-small);padding:8px}.dxt-board button{min-height:44px}.lesson-content [data-dxt-self] p,.lesson-content [data-dxt-exam] p{font-size:var(--text-body);line-height:1.85}.lesson-content [data-dxt-source] p{font-size:var(--text-body);line-height:1.95}