/* Diagram kit (dg-*): labeled HTML/CSS diagrams that reflow on phones and follow the dark/light theme.
   Colors come only from theme tokens (plus #070708, the dark --bg, as text on solid orange).
   Loaded only on pages that carry a diagram. Authoring guide: tools/diagrams/GUIDE.md */

.dg{--dg-line:var(--text-3);--dg-node:var(--bg);--dg-on-key:#070708;margin:28px 0;max-width:720px;font-family:var(--font-body);color:var(--text);font-size:14px;line-height:1.45}
.dg *,.dg *::before,.dg *::after{box-sizing:border-box}
.dg :where(ol,ul){list-style:none;margin:0;padding:0;max-width:none}
.dg :where(li){margin:0;padding:0;max-width:none;font-size:inherit;line-height:inherit}
.dg-frame{background:var(--bg-2);border:1px solid var(--border);border-radius:10px;padding:16px 18px 18px}
.dg-title{font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--orange-fg);line-height:1.4;margin:0 0 14px;text-wrap:balance}
figure.dg>figcaption.dg-cap{font-size:13px;font-style:normal;text-align:left;line-height:1.6;color:var(--text-3);margin:8px 0 0;text-wrap:pretty}
.dg-sub{font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--text-2);margin:16px 0 8px}
.dg-sub:first-child{margin-top:0}
.dg-note{font-size:12.5px;line-height:1.5;color:var(--text-3);margin-top:12px}

/* Text roles inside any box */
.dg-k{display:block;font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--text-3);line-height:1.35;margin-bottom:3px}
.dg-h{display:block;font-weight:700;font-size:14px;line-height:1.3;color:var(--text);text-wrap:balance}
.dg-t{display:block;font-size:13px;line-height:1.45;color:var(--text-2);margin-top:3px}
.dg-v{display:block;font-family:var(--font-display);font-weight:800;font-size:20px;line-height:1.15;color:var(--text);margin-top:2px;font-variant-numeric:tabular-nums}

/* Node: the basic box */
.dg-node{background:var(--dg-node);border:1px solid var(--border-hi);border-radius:8px;padding:10px 12px;min-width:0;position:relative;overflow-wrap:break-word}
.dg .is-key.dg-node,.dg .is-key.dg-layer{border-color:var(--orange);background:var(--orange-dim)}
.dg .is-key>.dg-k,.dg .is-key>.dg-v{color:var(--orange-fg)}
.dg .is-good.dg-node,.dg .is-good.dg-layer{border-left:4px solid var(--green)}
.dg .is-bad.dg-node,.dg .is-bad.dg-layer{border-left:4px solid var(--red)}
.dg .is-muted.dg-node,.dg .is-muted.dg-layer{border-style:dashed;background:transparent}
.dg .is-muted>.dg-h{color:var(--text-2)}

/* Tags and chips */
.dg-tag{display:inline-block;font-family:var(--font-mono);font-size:11px;letter-spacing:.04em;line-height:1.3;padding:2px 7px;border:1px solid var(--border-hi);border-radius:999px;color:var(--text-2);margin-top:6px;white-space:nowrap}
.dg .is-key.dg-tag{color:var(--orange-fg);border-color:var(--orange)}
.dg .is-good.dg-tag{color:var(--green);border-color:currentColor}
.dg .is-bad.dg-tag{color:var(--red);border-color:currentColor}
.dg-chips{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}
.dg-group{display:flex;flex-direction:column;gap:6px;margin-top:8px}
.dg-chip{display:inline-flex;align-items:center;justify-content:center;min-height:26px;padding:3px 9px;font-size:12px;line-height:1.3;border:1px solid var(--border-hi);border-radius:6px;background:var(--bg-2);color:var(--text);width:var(--w,auto);max-width:100%;text-align:center}
.dg .is-key.dg-chip{border-color:var(--orange);background:var(--orange-dim);color:var(--text)}
.dg .is-muted.dg-chip{border-style:dashed;color:var(--text-3)}

/* Arrows (decorative: always aria-hidden="true"). Horizontal by default. */
.dg-arrow{flex:0 0 28px;align-self:center;position:relative;width:28px;height:18px;color:var(--dg-line)}
.dg-arrow::before{content:"";position:absolute;left:1px;right:7px;top:50%;border-top:2px solid currentColor;transform:translateY(-50%)}
.dg-arrow::after{content:"";position:absolute;right:0;top:50%;transform:translateY(-50%);border-left:8px solid currentColor;border-top:5px solid transparent;border-bottom:5px solid transparent}
.dg .is-key.dg-arrow{color:var(--orange)}
.dg-arrow.has-label{flex-basis:84px;width:84px;height:40px}
.dg-arrow.has-label::before,.dg-arrow.has-label::after{top:auto;bottom:4px;transform:none}
.dg-arrow.has-label::after{bottom:0}
.dg-arrow-l{position:absolute;left:0;right:0;top:0;font-family:var(--font-mono);font-size:11px;line-height:1.25;color:var(--text-2);text-align:center}
.dg-flow--v>.dg-arrow,.dg-col>.dg-arrow,.dg-arrow--down{flex:0 0 26px;width:18px;height:26px;align-self:center}
.dg-flow--v>.dg-arrow::before,.dg-col>.dg-arrow::before,.dg-arrow--down::before{left:50%;right:auto;top:1px;bottom:7px;border-top:0;border-left:2px solid currentColor;transform:translateX(-50%)}
.dg-flow--v>.dg-arrow::after,.dg-col>.dg-arrow::after,.dg-arrow--down::after{left:50%;right:auto;top:auto;bottom:0;transform:translateX(-50%);border-top:8px solid currentColor;border-left:5px solid transparent;border-right:5px solid transparent;border-bottom:0}
.dg-flow--v>.dg-arrow.has-label,.dg-col>.dg-arrow.has-label,.dg-arrow--down.has-label{height:30px;width:18px;flex-basis:30px}
.dg-flow--v>.dg-arrow .dg-arrow-l,.dg-col>.dg-arrow .dg-arrow-l,.dg-arrow--down .dg-arrow-l{left:22px;right:auto;top:50%;transform:translateY(-50%);width:max-content;max-width:260px;text-align:left}

/* Flow: steps left to right (top to bottom on phones, or always with .dg-flow--v) */
.dg-flow{display:flex;align-items:stretch;gap:6px}
.dg-flow>.dg-node,.dg-flow>.dg-group-box{flex:1 1 0}
.dg-flow--v{flex-direction:column}
.dg-flow--v>.dg-node{flex:0 0 auto}

/* Cycle: a flow whose last step feeds back into the first */
.dg-cycle{display:grid;grid-template-columns:minmax(0,1fr);grid-template-rows:auto 30px;--n:4}
.dg-return{position:relative;margin:4px calc(50% / var(--n)) 0;border:2px solid var(--dg-line);border-top:0;border-radius:0 0 12px 12px;height:22px}
.dg-return::after{content:"";position:absolute;left:-7px;top:-8px;border-bottom:8px solid var(--dg-line);border-left:6px solid transparent;border-right:6px solid transparent}
.dg-return-l{position:absolute;left:50%;bottom:-9px;transform:translateX(-50%);background:var(--bg-2);padding:0 8px;font-family:var(--font-mono);font-size:11px;line-height:16px;color:var(--text-2);white-space:nowrap}

/* Stair: ordered steps that climb left to right */
.dg-stair{display:grid;grid-auto-flow:column;grid-auto-columns:minmax(0,1fr);gap:5px;align-items:end;border-bottom:2px solid var(--dg-line);counter-reset:dgstep}
.dg-stair>li{counter-increment:dgstep;background:var(--dg-node);border:1px solid var(--border-hi);border-bottom:0;border-radius:7px 7px 0 0;padding:8px 7px 10px;min-height:calc(64px + var(--i,0) * 20px);min-width:0;overflow-wrap:break-word}
.dg-stair>li::before{content:counter(dgstep);display:block;font-family:var(--font-mono);font-size:11px;color:var(--text-3);margin-bottom:2px}
.dg-stair>li.is-key{border-color:var(--orange);background:var(--orange-dim)}
.dg-stair>li.is-key::before{color:var(--orange-fg)}
.dg-stair .dg-h{font-size:12.5px}
.dg-stair .dg-t{font-size:12px}
.dg-stair>li:nth-child(2){--i:1}.dg-stair>li:nth-child(3){--i:2}.dg-stair>li:nth-child(4){--i:3}.dg-stair>li:nth-child(5){--i:4}.dg-stair>li:nth-child(6){--i:5}.dg-stair>li:nth-child(7){--i:6}.dg-stair>li:nth-child(8){--i:7}.dg-stair>li:nth-child(9){--i:8}.dg-stair>li:nth-child(10){--i:9}.dg-stair>li:nth-child(11){--i:10}.dg-stair>li:nth-child(12){--i:11}

/* Stair as a list: the phone layout at every width (use for 8+ steps) */
.dg-stair.dg-stair--list{grid-auto-flow:row;grid-auto-columns:auto;border-bottom:0;border-left:2px solid var(--dg-line);padding-left:8px;gap:6px}
.dg-stair--list>li{min-height:0;border:1px solid var(--border-hi);border-radius:7px;margin-left:calc(var(--i,0) * 7px);display:grid;grid-template-columns:22px minmax(0,1fr);column-gap:6px}
.dg-stair--list>li>*{grid-column:2}
.dg-stair--list>li::before{grid-column:1;grid-row:1/span 3;margin:0}
.dg-stair--list .dg-h{font-size:13.5px}
.dg-stair--list .dg-t{font-size:12.5px}

/* Bars: proportional horizontal bars with segments and threshold ticks */
.dg-bars{display:grid;gap:14px}
.dg-row{display:grid;grid-template-columns:minmax(92px,24%) minmax(0,1fr);gap:10px;align-items:center}
.dg-row-l{font-size:13px;line-height:1.3;color:var(--text-2)}
.dg-row-l>strong{display:block;color:var(--text);font-weight:700}
.dg-track{position:relative;display:flex;height:28px;background:var(--bg-3);border-radius:4px}
.dg-row.has-ticks .dg-track{margin-top:24px}
.dg-seg{flex:0 0 var(--w);min-width:0;height:100%;background:var(--gray-500);color:var(--text);display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:600;line-height:1;white-space:nowrap;overflow:hidden;box-shadow:inset -2px 0 0 var(--bg-2);font-variant-numeric:tabular-nums}
.dg-seg:first-child{border-radius:4px 0 0 4px}
.dg .is-key.dg-seg{background:var(--orange);color:var(--dg-on-key)}
.dg .is-alt.dg-seg{background:var(--text-3);color:var(--bg)}
.dg .is-good.dg-seg{background:var(--green);color:var(--bg)}
.dg .is-bad.dg-seg{background:var(--red);color:var(--bg)}
.dg .is-muted.dg-seg{background:transparent;box-shadow:none;border:1px dashed var(--text-3);color:var(--text-2)}
.dg-tick{position:absolute;left:var(--at);top:-5px;bottom:-5px;width:0;border-left:2px dashed var(--text)}
.dg-tick-l{position:absolute;bottom:calc(100% + 2px);left:0;transform:translateX(-50%);font-family:var(--font-mono);font-size:11px;line-height:1.2;color:var(--text);white-space:nowrap}
.dg-tick--end .dg-tick-l{transform:translateX(-100%)}
.dg-tick--start .dg-tick-l{transform:none}
.dg .is-key.dg-tick{border-left-color:var(--orange)}
.dg .is-key>.dg-tick-l{color:var(--orange-fg)}
.dg-scale{display:flex;justify-content:space-between;font-family:var(--font-mono);font-size:11px;color:var(--text-3);margin-top:4px}
.dg-row .dg-scale{grid-column:2}

/* Legend */
.dg-legend{display:flex;flex-wrap:wrap;gap:6px 16px;margin-top:12px;font-size:12.5px;line-height:1.4;color:var(--text-2)}
.dg-legend>span{display:inline-flex;align-items:center;gap:6px}
.dg-sw{display:inline-block;flex:0 0 12px;width:12px;height:12px;border-radius:3px;background:var(--gray-500)}
.dg .is-key.dg-sw{background:var(--orange)}
.dg .is-alt.dg-sw{background:var(--text-3)}
.dg .is-good.dg-sw{background:var(--green)}
.dg .is-bad.dg-sw{background:var(--red)}
.dg .is-muted.dg-sw{background:transparent;border:1px dashed var(--text-3)}

/* Compare: side-by-side columns (stack on phones) */
.dg-compare{display:grid;grid-template-columns:repeat(var(--cols,2),minmax(0,1fr));gap:16px}
.dg-col{display:flex;flex-direction:column;gap:6px;min-width:0}
.dg-col-h{font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;line-height:1.35;color:var(--text-2);padding-bottom:6px;border-bottom:2px solid var(--border-hi);margin-bottom:4px}
.dg-col.is-key>.dg-col-h{color:var(--orange-fg);border-bottom-color:var(--orange)}

/* Stack: layers top to bottom (priority, seniority, protocol layers); optional side axis */
.dg-stackwrap{display:grid;grid-template-columns:auto minmax(0,1fr);gap:12px}
.dg-axis{display:flex;flex-direction:column;align-items:center;width:52px;font-family:var(--font-mono);font-size:11px;line-height:1.25;color:var(--text-2);text-align:center}
.dg-axis-line{flex:1 1 auto;position:relative;width:2px;min-height:24px;margin:6px 0 10px;background:var(--dg-line)}
.dg-axis-line::after{content:"";position:absolute;left:50%;bottom:-8px;transform:translateX(-50%);border-top:8px solid var(--dg-line);border-left:5px solid transparent;border-right:5px solid transparent}
.dg-stack{display:flex;flex-direction:column;gap:5px;min-width:0}
.dg-layer{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:2px 12px;align-items:center;padding:9px 12px;background:var(--dg-node);border:1px solid var(--border-hi);border-radius:6px;width:var(--w,100%);margin-inline:auto;min-width:0}
.dg-layer>.dg-t{grid-column:1/-1;margin-top:0}
.dg-layer-v{font-family:var(--font-mono);font-size:12px;color:var(--text-2);text-align:right;white-space:nowrap}
.dg .is-key>.dg-layer-v{color:var(--orange-fg)}

/* Tree: one question or source branching into outcomes (nested <ul>) */
.dg-tree ul{display:flex;justify-content:center;position:relative;padding-top:18px}
.dg-tree>ul{padding-top:0}
.dg-tree li{flex:1 1 0;min-width:0;display:flex;flex-direction:column;align-items:center;position:relative;padding:18px 4px 0}
.dg-tree>ul>li{padding-top:0}
.dg-tree li::before,.dg-tree li::after{content:"";position:absolute;top:0;right:50%;width:50%;height:18px;border-top:2px solid var(--dg-line)}
.dg-tree li::after{right:auto;left:50%;border-left:2px solid var(--dg-line)}
.dg-tree li:only-child::before,.dg-tree li:only-child::after,.dg-tree>ul>li::before,.dg-tree>ul>li::after{display:none}
.dg-tree li:only-child{padding-top:18px}
.dg-tree li:only-child::after{display:block;left:50%;width:0;border-top:0}
.dg-tree>ul>li:only-child{padding-top:0}
.dg-tree>ul>li:only-child::after{display:none}
.dg-tree li:first-child::before,.dg-tree li:last-child::after{border:0 none}
.dg-tree li:last-child::before{border-right:2px solid var(--dg-line);border-radius:0 8px 0 0}
.dg-tree li:first-child::after{border-radius:8px 0 0 0}
.dg-tree ul ul::before{content:"";position:absolute;top:0;left:50%;height:18px;border-left:2px solid var(--dg-line)}
.dg-tree .dg-node{width:100%;max-width:240px;text-align:center}
.dg-branch{display:block;font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--text-2);margin:0 0 4px;text-align:center}

/* Matrix: a labeled grid (2x2 and similar) */
.dg-matrix{display:grid;grid-template-columns:minmax(64px,auto) repeat(var(--cols,2),minmax(0,1fr));gap:6px}
.dg-mh{display:flex;align-items:center;justify-content:center;text-align:center;font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase;line-height:1.3;color:var(--text-2);padding:4px}
.dg-mh:empty{padding:0}

/* Equation: boxes joined by operators (+ − × ÷ =) */
.dg-eq{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:8px}
.dg-eq>.dg-node{flex:0 1 auto;text-align:center;min-width:92px}
.dg-op{font-family:var(--font-display);font-size:24px;font-weight:700;line-height:1;color:var(--text-3);padding:0 2px}

/* Timeline: evenly spaced events (vertical on phones) */
.dg-timeline{display:grid;grid-auto-flow:column;grid-auto-columns:minmax(0,1fr);position:relative}
.dg-timeline::before{content:"";position:absolute;left:0;right:0;top:27px;border-top:2px solid var(--dg-line)}
.dg-ev{position:relative;padding:44px 6px 0;text-align:center;min-width:0;overflow-wrap:break-word}
.dg-ev::before{content:"";position:absolute;top:21px;left:50%;width:14px;height:14px;border-radius:50%;transform:translateX(-50%);background:var(--bg-2);border:2px solid var(--dg-line)}
.dg-ev.is-key::before{background:var(--orange);border-color:var(--orange)}
.dg-ev--gap::before{border-style:dashed}
.dg-ev--gap .dg-t{font-style:italic}
.dg-ev-d{position:absolute;top:0;left:0;right:0;font-family:var(--font-mono);font-size:11px;line-height:16px;color:var(--text-2);white-space:nowrap}
.dg-ev.is-key>.dg-ev-d{color:var(--orange-fg)}

/* Columns: a schematic column chart for rules and shapes (not data series; those go through viz.js) */
.dg-colchart{display:flex;align-items:flex-end;gap:var(--gap,3px);height:var(--ch,150px);border-bottom:2px solid var(--dg-line);padding-top:20px}
.dg-bar{flex:1 1 0;min-width:1px;height:var(--h);background:var(--border-hi);border-radius:2px 2px 0 0;position:relative}
.dg .is-key.dg-bar{background:var(--orange)}
.dg .is-alt.dg-bar{background:var(--text-3)}
.dg .is-muted.dg-bar{background:transparent;box-shadow:inset 0 0 0 1px var(--border-hi)}
.dg-bar-l{position:absolute;z-index:1;bottom:calc(100% + 3px);left:50%;transform:translateX(-50%);font-family:var(--font-mono);font-size:11px;line-height:1.2;color:var(--text);white-space:nowrap;background:var(--bg-2);padding:0 3px;border-radius:3px}
.dg-bar--start .dg-bar-l{left:0;transform:none}
.dg-bar--end .dg-bar-l{left:auto;right:0;transform:none}
.dg-xaxis{display:flex;justify-content:space-between;gap:8px;font-family:var(--font-mono);font-size:11px;line-height:1.3;color:var(--text-3);margin-top:5px}
.dg-yl{font-family:var(--font-mono);font-size:11px;color:var(--text-3);margin-bottom:4px}

/* Phones */
@media (max-width:600px){
 .dg-frame{padding:14px 12px 16px}
 .dg-flow{flex-direction:column}
 .dg-flow>.dg-node,.dg-flow>.dg-group-box{flex:0 0 auto}
 .dg-flow>.dg-arrow{flex:0 0 26px;width:18px;height:26px;align-self:center}
 .dg-flow>.dg-arrow::before{left:50%;right:auto;top:1px;bottom:7px;border-top:0;border-left:2px solid currentColor;transform:translateX(-50%)}
 .dg-flow>.dg-arrow::after{left:50%;right:auto;top:auto;bottom:0;transform:translateX(-50%);border-top:8px solid currentColor;border-left:5px solid transparent;border-right:5px solid transparent;border-bottom:0}
 .dg-flow>.dg-arrow.has-label{height:30px;width:18px;flex-basis:30px}
 .dg-flow>.dg-arrow .dg-arrow-l{left:22px;right:auto;top:50%;transform:translateY(-50%);width:max-content;max-width:260px;text-align:left}
 .dg-cycle{grid-template-columns:minmax(0,1fr) 30px;grid-template-rows:auto}
 .dg-return{margin:28px 0 28px 4px;height:auto;border:2px solid var(--dg-line);border-left:0;border-radius:0 12px 12px 0}
 .dg-return::after{left:-8px;top:-7px;border-bottom:6px solid transparent;border-top:6px solid transparent;border-right:8px solid var(--dg-line);border-left:0}
 .dg-return-l{left:auto;right:-9px;bottom:auto;top:50%;transform:translateY(-50%) rotate(180deg);writing-mode:vertical-rl;padding:8px 0}
 .dg-stair{grid-auto-flow:row;grid-auto-columns:auto;border-bottom:0;border-left:2px solid var(--dg-line);padding-left:8px;gap:6px}
 .dg-stair>li{min-height:0;border:1px solid var(--border-hi);border-radius:7px;margin-left:calc(var(--i,0) * 7px);display:grid;grid-template-columns:22px minmax(0,1fr);column-gap:6px}
 .dg-stair>li>*{grid-column:2}
 .dg-stair>li::before{grid-column:1;grid-row:1/span 3;margin:0}
 .dg-stair .dg-h{font-size:13.5px}
 .dg-stair .dg-t{font-size:12.5px}
 .dg-row{grid-template-columns:minmax(0,1fr);gap:6px}
 .dg-row .dg-scale{grid-column:1}
 .dg-compare{grid-template-columns:minmax(0,1fr)}
 .dg-stackwrap{gap:8px}
 .dg-axis{width:44px}
 .dg-layer{width:100%}
 .dg-tree ul{display:block;padding:0 0 0 16px}
 .dg-tree>ul{padding-left:0}
 .dg-tree li{display:block;padding:10px 0 0 18px}
 .dg-tree>ul>li{padding:0}
 .dg-tree li::before{top:0;left:0;right:auto;width:14px;height:30px;border:0;border-left:2px solid var(--dg-line);border-bottom:2px solid var(--dg-line);border-radius:0 0 0 8px}
 .dg-tree li::after{top:0;bottom:0;left:0;right:auto;width:0;height:auto;border:0;border-left:2px solid var(--dg-line);border-radius:0}
 .dg-tree li:last-child::after{display:none}
 .dg-tree li:first-child::before,.dg-tree li:last-child::before{border:0;border-left:2px solid var(--dg-line);border-bottom:2px solid var(--dg-line);border-radius:0 0 0 8px}
 .dg-tree li:first-child::after{border:0;border-left:2px solid var(--dg-line);border-radius:0}
 .dg-tree li:only-child::before{display:block}
 .dg-tree ul ul::before{display:none}
 .dg-tree>ul>li::before,.dg-tree>ul>li::after{display:none}
 .dg-tree .dg-node{max-width:none;text-align:left}
 .dg-branch{text-align:left}
 .dg-timeline{grid-auto-flow:row;grid-auto-columns:auto}
 .dg-timeline::before{left:7px;right:auto;top:6px;bottom:6px;border-top:0;border-left:2px solid var(--dg-line)}
 .dg-ev{padding:0 0 14px 30px;text-align:left}
 .dg-ev::before{top:2px;left:1px;transform:none}
 .dg-ev-d{position:static;display:block}
 .dg-matrix{grid-template-columns:minmax(52px,auto) repeat(var(--cols,2),minmax(0,1fr))}
}