/* Shared article layouts and instruments use the existing site tokens. */
.knowledge-intro h1 { max-width: 1100px; font-size: clamp(2.4rem, 6.5vw, 5.25rem); }
.knowledge-intro-bottom { display: flex; gap: 30px; align-items: end; justify-content: space-between; }
.knowledge-intro-bottom .lead { margin-bottom: 0; }
.knowledge-intro-bottom .btn { flex-shrink: 0; }
.knowledge-tool-section { margin-top: 36px; padding-bottom: 40px; scroll-margin-top: 100px; }
.knowledge-workbench { border: 1px solid var(--stroke); border-radius: var(--radius); padding: 30px; background: var(--card); overflow: hidden; }
.tool-head { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; justify-content: space-between; margin-bottom: 26px; font-size: .8rem; }
.tool-split { display: grid; grid-template-columns: minmax(0, 1.65fr) minmax(0, 1fr); gap: 36px; align-items: start; }
.tool-split > div { min-width: 0; }
.tool-field { display: grid; align-content: start; gap: 8px; font-size: .85rem; margin: 18px 0; }
.tool-field input, .tool-field select, .tool-field textarea { width: 100%; min-width: 0; font: inherit; font-size: 1rem; color: var(--ink); background: var(--card); border: 1px solid var(--stroke); border-radius: var(--radius-sm); padding: 12px; }
.tool-field small { color: var(--muted); font-size: .75rem; }
.tool-note { margin: 22px 0 0 !important; font-size: .78rem; color: var(--muted); line-height: 1.6; }
.tool-error { color: var(--accent); font-size: .85rem; margin: 12px 0 0; }
.tool-error:empty { display: none; }
.knowledge-choices { display: flex; flex-wrap: wrap; gap: 8px; margin: 20px 0; }
.knowledge-choices button, .tool-text-button { font: inherit; cursor: pointer; min-height: 44px; touch-action: manipulation; }
.knowledge-choices button { background: transparent; border: 1px solid var(--stroke); color: inherit; border-radius: var(--radius-sm); padding: 9px 16px; font-size: .85rem; }
.knowledge-choices button[aria-pressed="true"] { background: var(--ink); color: var(--card); }
.tool-text-button { background: transparent; color: inherit; border: 0; text-decoration: underline; text-underline-offset: 4px; padding: 8px 0; }
.knowledge-workbench svg[data-chart] { width: 100%; height: auto; display: block; }
.knowledge-legend { display: flex; flex-wrap: wrap; gap: 12px 20px; font-size: .8rem; margin-bottom: 16px; }
.knowledge-legend span { display: inline-flex; align-items: center; gap: 8px; }
.knowledge-legend .line-a::before, .knowledge-legend .line-b::before, .knowledge-legend .line-c::before { content: ''; width: 20px; border-top: 3px solid; }
.knowledge-legend .line-a::before { color: var(--accent); }
.knowledge-legend .line-b::before { color: var(--accent-2); }
.knowledge-legend .line-c::before { color: var(--accent-3); border-top-style: dashed; }
.knowledge-grid { stroke: currentColor; opacity: .12; }
.knowledge-axis { fill: currentColor; font-size: 13px; opacity: .75; }
.knowledge-curve { fill: none; stroke-linejoin: round; stroke-linecap: round; stroke-width: 2.5; }
.knowledge-cursor { stroke: currentColor; stroke-dasharray: 3 4; opacity: .5; }
.furnace-map { position: relative; aspect-ratio: 1.1; border: 18px solid var(--bg-alt); border-radius: var(--radius); background: var(--ink); min-width: 0; }
.heat-tiles { display: grid; grid-template-columns: repeat(3, 1fr); height: 100%; gap: 3px; border-radius: var(--radius-sm); overflow: hidden; }
.heat-tiles i { background: var(--bg-alt); }
.heater-stripe { position: absolute; z-index: 1; left: 4%; top: 8%; bottom: 8%; width: 8px; border: 2px dashed var(--accent-3); }
.map-load { position: absolute; inset: 34% 24% 30%; display: flex; gap: 10px; align-items: center; justify-content: center; }
.map-load span { width: 28%; height: 85%; background: color-mix(in srgb, var(--ink) 55%, transparent); border: 1px solid var(--card); border-radius: var(--radius-sm); }
.map-load[data-load="empty"] { opacity: 0; }
.map-load[data-load="dense"] { inset: 20% 16% 20%; gap: 3px; }
.map-load[data-load="dense"] span { width: 33%; height: 95%; }
.map-label { position: absolute; left: 50%; top: 48%; transform: translate(-50%, -50%); color: var(--card); font-size: .8rem; pointer-events: none; }
.door-label { position: absolute; bottom: -16px; left: 50%; transform: translateX(-50%); background: var(--bg-alt); color: var(--ink); font-size: .72rem; padding: 0 12px; }
.probe-point { position: absolute; display: flex; align-items: center; gap: 6px; border: 0; color: var(--card); background: transparent; cursor: pointer; font: inherit; min-height: 44px; padding: 4px; touch-action: manipulation; }
.probe-point b { display: flex; flex-shrink: 0; align-items: center; justify-content: center; width: 36px; height: 36px; border: 1px solid var(--card); border-radius: 50%; background: var(--ink); }
.probe-point span { font-size: .7rem; background: var(--ink); border-radius: 4px; padding: 3px 5px; }
.probe-point[aria-pressed="true"] b { background: var(--accent-3); color: var(--ink); box-shadow: 0 0 0 6px color-mix(in srgb, var(--accent-3) 30%, transparent); }
.probe-heater { top: 10%; left: 3%; }
.probe-center { top: 20%; left: 40%; }
.probe-door { bottom: 5%; left: 28%; }
.probe-shadow { bottom: 22%; right: 1%; }
.probe-readout h2 { font-size: clamp(1.6rem, 3vw, 2.5rem); margin: 12px 0 22px; }
.probe-readout > span { color: var(--muted); font-size: .8rem; }
.probe-status { border-left: 3px solid var(--accent-2); padding-left: 16px; font-size: .85rem; }
.glass-bench, .trace-bench { background: var(--ink); color: var(--card); border-color: var(--ink); }
.glass-bench .eyebrow, .glass-bench .tool-note, .trace-bench .eyebrow, .trace-bench .tool-note { color: var(--card); opacity: .7; }
.glass-slabs { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; margin-bottom: 30px; }
.glass-slabs button { display: grid; align-content: end; gap: 12px; padding: 18px; min-height: 160px; border-radius: var(--radius-sm); background: transparent; border: 1px solid color-mix(in srgb, var(--card) 25%, transparent); color: inherit; cursor: pointer; font: inherit; text-align: left; touch-action: manipulation; }
.glass-slabs button[aria-pressed="true"] { border-color: var(--accent-3); background: color-mix(in srgb, var(--card) 8%, transparent); }
.glass-slabs .slab { display: block; width: 100%; border-top: 2px solid var(--card); background: color-mix(in srgb, var(--accent-2) 40%, transparent); border-radius: 2px; }
.glass-slabs strong { font-size: 1.5rem; }
.glass-slabs small { font-size: .78rem; opacity: .7; }
.glass-readout > span, .glass-readout > small { display: block; opacity: .7; font-size: .8rem; }
.glass-readout > strong { display: block; color: var(--accent-3); font-size: clamp(3rem, 6vw, 5rem); line-height: 1.1; font-variant-numeric: tabular-nums; margin-top: 14px; }
.glass-readout p { font-size: .86rem; margin-top: 22px; }
.tool-scrubber { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; font-size: .8rem; margin-top: 22px; }
.tool-scrubber input { flex: 1; min-width: 120px; accent-color: var(--accent-3) !important; }
.tool-scrubber output { min-width: 50px; font-variant-numeric: tabular-nums; }
.trace-bench .btn.ghost { color: var(--card); border-color: var(--card); }
.trace-inputs { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.trace-slot { min-width: 0; margin: 0; padding: 20px; border-radius: var(--radius-sm); border: 1px solid color-mix(in srgb, var(--card) 25%, transparent); }
.trace-slot legend { padding: 0 8px; font-weight: 600; }
.file-label { display: grid; gap: 10px; font-size: .85rem; }
.file-label > span { display: block; padding: 12px; border: 1px solid var(--card); border-radius: var(--radius-sm); cursor: pointer; min-height: 44px; }
.file-label:focus-within { outline: 3px solid var(--accent-2); outline-offset: 5px; }
.trace-slot details > summary { cursor: pointer; min-height: 44px; padding-top: 14px; font-size: .85rem; }
.file-label input { width: 100%; min-width: 0; font: inherit; font-size: .82rem; }
.file-label input::file-selector-button { background: var(--card); color: var(--ink); border: 0; border-radius: var(--radius-sm); padding: 12px; margin-right: 8px; cursor: pointer; font: inherit; }
.header-choice { display: flex; gap: 10px; align-items: center; font-size: .8rem; margin-top: 16px; min-height: 44px; }
.header-choice input { width: 18px; height: 18px; accent-color: var(--accent-2); }
.mapping-fields { display: grid; grid-template-columns: 1fr 1fr; gap: 0 12px; }
.trace-empty { padding: 36px 0 10px; text-align: center; }
.trace-empty > span { display: block; font-size: 4rem; color: var(--accent-3); letter-spacing: -.05em; }
.trace-empty p { max-width: 520px; margin: 18px auto; }
.trace-empty a { text-decoration: underline; text-underline-offset: 4px; font-size: .85rem; }
.paste-details { margin: 20px 0; font-size: .85rem; }
.paste-details summary { cursor: pointer; padding: 10px 0; }
.trace-data-label { color: var(--accent-3); margin-top: 24px; font-size: .85rem; }
.band-field { max-width: 220px; }
.trace-table-wrap, .reference-table-wrap { overflow-x: auto; }
.trace-metrics, .reference-table { width: 100%; border-collapse: collapse; font-size: .85rem; font-variant-numeric: tabular-nums; }
.trace-metrics caption, .reference-table caption { text-align: left; font-size: .78rem; margin-bottom: 14px; }
.trace-metrics th, .trace-metrics td, .reference-table th, .reference-table td { text-align: left; padding: 12px 10px 12px 0; border-bottom: 1px solid var(--stroke); }
.trace-metrics th, .trace-metrics td { border-color: color-mix(in srgb, var(--card) 20%, transparent); }
.method-list div { border-bottom: 1px solid var(--stroke); padding: 16px 0; }
.method-list dt { font-weight: 600; }
.method-list dd { margin: 8px 0 0; }
.diagnostic-bench { padding: 36px; }
.diagnostic-route { display: flex; justify-content: space-between; align-items: center; gap: 16px; color: var(--muted); font-size: .8rem; padding-bottom: 26px; border-bottom: 1px solid var(--stroke); }
.diagnostic-route i { color: var(--accent); font-size: 1.6rem; font-style: normal; }
.diagnostic-current { padding-top: 30px; }
.diagnostic-current h2 { font-size: clamp(1.5rem, 3.4vw, 2.8rem); max-width: 850px; margin: 16px 0 26px; }
.diagnostic-options { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.diagnostic-options button { border: 1px solid var(--stroke); border-radius: var(--radius-sm); background: var(--bg); color: var(--ink); font: inherit; font-size: 1rem; text-align: left; padding: 24px; cursor: pointer; min-height: 95px; touch-action: manipulation; }
.diagnostic-options button:hover { border-color: var(--accent); }
.diagnostic-navigation { display: flex; gap: 26px; margin-top: 22px; font-size: .85rem; }
.diagnostic-current ol { padding-left: 24px; }
.diagnostic-current li { margin-bottom: 14px; }
.cost-common { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.cost-stage { margin: 18px 0; display: grid; grid-template-columns: 1fr 1fr; gap: 0 18px; border: 0; border-top: 1px solid var(--stroke); padding: 0; }
.cost-stage legend { color: var(--muted); padding: 0 14px 0 0; font-size: .85rem; }
.cost-stage > span { grid-column: 1 / -1; color: var(--muted); font-size: .8rem; }
.energy-receipt { border-top: 3px solid var(--ink); border-bottom: 3px solid var(--ink); padding: 26px 0; }
.energy-receipt > span { color: var(--muted); font-size: .8rem; }
.energy-receipt > strong { display: block; font-size: clamp(2.8rem, 5vw, 4.5rem); line-height: 1.1; margin: 18px 0; letter-spacing: -.04em; font-variant-numeric: tabular-nums; }
.energy-receipt > strong small { font-size: 1rem; font-weight: 500; letter-spacing: 0; }
.energy-receipt dl { margin: 24px 0; }
.energy-receipt dl div { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; border-bottom: 1px dashed var(--stroke); padding: 14px 0; }
.energy-receipt dt { font-size: .85rem; }
.energy-receipt dd { margin: 0; font-size: 1.4rem; font-variant-numeric: tabular-nums; font-weight: 600; }
.energy-receipt dd { overflow-wrap: anywhere; min-width: 0; text-align: right; }
.energy-receipt p { color: var(--muted); font-size: .85rem; }
.energy-stack { display: flex; height: 26px; overflow: hidden; border-radius: 4px; background: var(--bg-alt); }
.energy-stack span { height: 100%; background: var(--accent); }
.energy-stack span:nth-child(2) { background: var(--accent-2); }
.energy-stack span:nth-child(3) { background: var(--accent-3); }
.cost-layout { grid-template-columns: 1.2fr 1fr; }
.knowledge-article .control-footer nav { flex-wrap: wrap; }
.knowledge-card-number { color: var(--accent); font-size: 2.4rem; line-height: 1; }
@media (max-width: 900px) {
  .tool-split { gap: 24px; grid-template-columns: 1fr; }
  .probe-readout { display: grid; grid-template-columns: 1fr 1fr; gap: 0 24px; }
  .probe-readout > span, .probe-readout h2, .probe-readout > p { grid-column: 1 / -1; }
  .furnace-map { max-width: 650px; width: 100%; margin: 0 auto; }
  .glass-readout { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 20px; }
  .glass-readout > strong { grid-row: 2 / 4; margin-top: 0; }
  .glass-readout > p { margin: 0; }
  .glass-readout > span { grid-column: 1 / -1; }
  .energy-receipt { position: static; }
}
@media (max-width: 620px) {
  .knowledge-intro-bottom { display: block; }
  .knowledge-intro-bottom .btn { margin-top: 24px; }
  .knowledge-workbench { padding: 22px 16px; }
  .tool-head { margin-bottom: 20px; }
  .glass-slabs { gap: 8px; }
  .glass-slabs button { padding: 10px; min-height: 140px; }
  .glass-slabs strong { font-size: 1.15rem; }
  .glass-slabs small { font-size: .7rem; }
  .glass-readout { display: block; }
  .glass-readout > strong { margin-top: 14px; }
  .glass-readout > p { margin-top: 16px; }
  .furnace-map { border-width: 10px; }
  .probe-point b { width: 28px; height: 28px; }
  .probe-point span { font-size: .62rem; }
  .probe-center { left: 30%; top: 30%; }
  .probe-door { left: 15%; }
  .probe-shadow { bottom: 22%; right: 0; }
  .map-load { gap: 4px; }
  .map-label { display: none; }
  .probe-readout { display: block; }
  .trace-inputs, .diagnostic-options { grid-template-columns: 1fr; }
  .trace-slot { padding: 16px 12px; }
  .mapping-fields { grid-template-columns: 1fr; }
  .trace-metrics { font-size: .75rem; }
  .trace-metrics th, .trace-metrics td { padding-right: 6px; }
  .reference-table { min-width: 500px; }
  .diagnostic-route { gap: 8px; font-size: .65rem; }
  .diagnostic-route i { font-size: 1rem; }
  .diagnostic-options button { min-height: 70px; padding: 18px; }
  .cost-common, .cost-stage { gap: 0 12px; }
  .cost-common .tool-field, .cost-stage .tool-field { font-size: .8rem; }
  .knowledge-legend { font-size: .7rem; gap: 8px 14px; }
}
@media (prefers-reduced-motion: no-preference) {
  .knowledge-choices button, .diagnostic-options button, .glass-slabs button { transition: background .18s var(--ease), border-color .18s var(--ease); }
  .probe-point[aria-pressed="true"] b { animation: probe-appear .3s var(--ease); }
  @keyframes probe-appear { from { transform: scale(.8); opacity: .5; } to { transform: scale(1); opacity: 1; } }
}
@media print {
  .knowledge-workbench { box-shadow: none; }
  .trace-inputs, .paste-details, .diagnostic-navigation, .knowledge-choices, .tool-scrubber, .cost-bench form > .btn { display: none; }
  .tool-split { display: block; }
}