/* Diagram and illustration styles for Mari Kit docs.
   Blueprint illustration language from the mari.guru landing: white nodes with a
   1px ink stroke and no radius, mono uppercase kind labels, 1px orthogonal
   connectors that end in a 6px filled square instead of an arrowhead.
   Scoped to .diagram, .diagram-hero and their own classes only. */

/* ---------- tokens ---------- */

.diagram,
.diagram-hero {
  --dg-bg: #ffffff;
  --dg-node: #ffffff;
  --dg-ink: #10263b;
  --dg-edge: #10263b;
  --dg-line: #d4d5d8;
  --dg-muted: #5d6b79;
  --dg-accent: #1e6fa8;
  --dg-accent-text: #1e6fa8;
  --dg-down: #e8f1f9;
  --dg-hot: #1c3f60;
  --dg-hot-text: #ffffff;
  --dg-hot-muted: rgba(255, 255, 255, 0.72);
  --dg-stale: #b23a1e;
  --dg-dots: rgba(0, 0, 0, 0.08);
  --dg-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --dg-sans: Inter, "Helvetica Neue", Arial, sans-serif;
  --dg-gap: 28px;   /* connector length, square included */
  --dg-tab: 18px;   /* x position of the vertical connector when stacked */
}

html[data-theme="dark"] .diagram,
html[data-theme="dark"] .diagram-hero,
body[data-theme="dark"] .diagram,
body[data-theme="dark"] .diagram-hero {
  --dg-bg: #0a1926;
  --dg-node: #0e2032;
  --dg-ink: #eaf0f5;
  --dg-edge: #7a93a9;
  --dg-line: #2d4356;
  --dg-muted: #8497a6;
  --dg-accent: #1e6fa8;
  --dg-accent-text: #6fb1e6;
  --dg-down: #14324c;
  --dg-hot: #1c3f60;
  --dg-hot-text: #ffffff;
  --dg-hot-muted: rgba(255, 255, 255, 0.72);
  --dg-stale: #e8805e;
  --dg-dots: rgba(255, 255, 255, 0.05);
}

@media (prefers-color-scheme: dark) {
  html:not([data-theme="light"]) body:not([data-theme="light"]) .diagram,
  html:not([data-theme="light"]) body:not([data-theme="light"]) .diagram-hero {
    --dg-bg: #0a1926;
    --dg-node: #0e2032;
    --dg-ink: #eaf0f5;
    --dg-edge: #7a93a9;
    --dg-line: #2d4356;
    --dg-muted: #8497a6;
    --dg-accent: #1e6fa8;
    --dg-accent-text: #6fb1e6;
    --dg-down: #14324c;
    --dg-hot: #1c3f60;
    --dg-hot-text: #ffffff;
    --dg-hot-muted: rgba(255, 255, 255, 0.72);
    --dg-stale: #e8805e;
    --dg-dots: rgba(255, 255, 255, 0.05);
  }
}

/* ---------- frame ---------- */

.diagram {
  position: relative;
  box-sizing: border-box;
  display: flex;
  align-items: stretch;
  margin: 28px 0;
  padding: 22px 20px;
  border: 1px solid var(--dg-line);
  border-radius: 0;
  background-color: var(--dg-bg);
  background-image: radial-gradient(var(--dg-dots) 1px, transparent 1.4px);
  background-size: 14px 14px;
  color: var(--dg-ink);
  font-family: var(--dg-sans);
  line-height: 1.35;
  counter-reset: dg;
}

.diagram *,
.diagram *::before,
.diagram *::after {
  box-sizing: border-box;
}

.diagram p {
  margin: 0;
}

.diagram strong {
  font-weight: 600;
}

/* ---------- nodes ---------- */

.diagram > div:where(:not(.bridge)) {
  counter-increment: dg;
}

.diagram > div:where(:not(.bridge, .arms, .fields)) {
  position: relative;
  flex: 1 1 0;
  min-width: 0;
  padding: 9px 12px 10px;
  border: 1px solid var(--dg-edge);
  border-radius: 0;
  background: var(--dg-node);
  font: 400 10px/1.45 var(--dg-mono);
  color: var(--dg-muted);
}

/* kind label: mono uppercase, a running number unless a variant names it */
.diagram > div:where(:not(.bridge, .arms, .fields)) > p:first-child::before,
.diagram > .arms::before {
  content: counter(dg, decimal-leading-zero);
  display: block;
  margin-bottom: 4px;
  font: 500 10px/1.2 var(--dg-mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--dg-muted);
}

.diagram > div > p > strong {
  display: block;
  font: 600 12.5px/1.3 var(--dg-sans);
  letter-spacing: -0.005em;
  color: var(--dg-ink);
}

.diagram .small {
  display: block;
  margin-top: 3px;
  font: 400 10px/1.45 var(--dg-mono);
  color: var(--dg-muted);
}

.diagram code,
.diagram code.literal,
.diagram code .pre {
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  font: 400 10.5px/1.6 var(--dg-mono);
  color: var(--dg-ink);
}

/* node states */
.diagram .gate,
.diagram .retr {
  border-color: var(--dg-accent);
  background: var(--dg-down);
}

.diagram .changed {
  border-color: var(--dg-stale);
  color: var(--dg-stale);
}
.diagram .changed > p > strong,
.diagram .changed > p:first-child::before,
.diagram .changed .small {
  color: var(--dg-stale);
}

/* ---------- connectors ---------- */

/* a paragraph between nodes is a connector: 1px line, 6px square terminal,
   optional mono label above the line. The literal arrow glyph is hidden. */
.diagram > p,
.diagram > .bridge {
  position: relative;
  flex: 0 0 auto;
  min-width: var(--dg-gap);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 0 4px;
  text-align: center;
  font: 400 10px/1.3 var(--dg-mono);
  letter-spacing: 0.02em;
  color: var(--dg-muted);
}

.diagram > p::before,
.diagram > .bridge::before {
  content: "";
  position: absolute;
  left: 0;
  right: 6px;
  top: calc(50% - 0.5px);
  height: 0;
  border-top: 1px solid var(--dg-edge);
}

.diagram > p::after,
.diagram > .bridge::after {
  content: "";
  position: absolute;
  right: 0;
  top: 50%;
  width: 6px;
  height: 6px;
  margin-top: -3px;
  background: var(--dg-edge);
}

.diagram > p > strong {
  display: none;
}

.diagram > p > em,
.diagram > .bridge > p {
  position: absolute;
  left: 50%;
  bottom: calc(50% + 6px);
  transform: translateX(-50%);
  z-index: 1;
  display: block;
  width: max-content;
  max-width: calc(100% + 8px);
  margin: 0;
  font-style: normal;
  white-space: normal;
}

.diagram > p:where(:has(> em)),
.diagram > .bridge {
  min-width: 96px;
}

/* ---------- chips: stages, lifecycle, resolution-cascade ---------- */

.diagram.stages > p,
.diagram.lifecycle > p,
.diagram.resolution-cascade > p {
  flex: 1 1 auto;
  min-width: 0;
  flex-direction: row;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-start;
  row-gap: 14px;
  padding: 0;
  text-align: left;
}

.diagram.stages > p::before,
.diagram.stages > p::after,
.diagram.lifecycle > p::before,
.diagram.lifecycle > p::after,
.diagram.resolution-cascade > p::before,
.diagram.resolution-cascade > p::after {
  content: none;
}

.diagram .step {
  position: relative;
  display: block;
  flex: 0 1 auto;
  padding: 7px 11px;
  border: 1px solid var(--dg-edge);
  background: var(--dg-node);
  font: 600 10.5px/1.3 var(--dg-mono);
  color: var(--dg-ink);
  text-align: center;
  white-space: nowrap;
}

.diagram .step:not(:last-child) {
  margin-right: var(--dg-gap);
}

.diagram .step:not(:last-child)::before {
  content: "";
  position: absolute;
  right: calc(-1 * var(--dg-gap) + 5px);
  width: calc(var(--dg-gap) - 6px);
  top: calc(50% - 0.5px);
  height: 0;
  border-top: 1px solid var(--dg-edge);
}

.diagram .step:not(:last-child)::after {
  content: "";
  position: absolute;
  right: calc(-1 * var(--dg-gap) - 1px);
  top: 50%;
  width: 6px;
  height: 6px;
  margin-top: -3px;
  background: var(--dg-edge);
}

/* ---------- timeline: adjacent nodes, connector drawn on the node ---------- */

.diagram.timeline > div + div {
  margin-left: var(--dg-gap);
}

.diagram.timeline > div + div::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--dg-gap));
  width: calc(var(--dg-gap) - 6px);
  top: calc(50% - 0.5px);
  height: 0;
  border-top: 1px solid var(--dg-edge);
}

.diagram.timeline > div + div::after {
  content: "";
  position: absolute;
  left: -6px;
  top: 50%;
  width: 6px;
  height: 6px;
  margin-top: -3px;
  background: var(--dg-edge);
}

/* ---------- state ---------- */

.diagram.state > .gate > p:first-child::before {
  content: "gate";
  color: var(--dg-accent-text);
}

/* ---------- context: arms, fused stage, envelope ---------- */

.diagram.context > .arms {
  position: relative;
  flex: 0 1 auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  min-width: 0;
}

.diagram.context > .arms::before {
  margin-bottom: 2px;
}

.diagram.context > .arms > p {
  padding: 5px 9px;
  border: 1px solid var(--dg-edge);
  background: var(--dg-node);
  font: 500 10.5px/1.3 var(--dg-mono);
  color: var(--dg-ink);
  white-space: nowrap;
}

.diagram.context > .stage > p + p {
  margin-top: 6px;
  padding-top: 6px;
  border-top: 1px solid var(--dg-line);
}

/* ---------- thresholds: a ruler from 0.00 to 1.00 ---------- */

.diagram.thresholds {
  padding-top: 28px;
}

.diagram.thresholds > div {
  flex: 1 1 0;
  min-width: max-content;
  padding: 10px 12px 8px 10px;
  border-width: 1px 0 0 1px;
  background: transparent;
}

.diagram.thresholds > div::before {
  content: "";
  position: absolute;
  left: -3.5px;
  top: -3.5px;
  width: 6px;
  height: 6px;
  background: var(--dg-edge);
}

.diagram.thresholds > div:nth-child(1) { flex-grow: 72; }
.diagram.thresholds > div:nth-child(2) { flex-grow: 23; }
.diagram.thresholds > div:nth-child(3) { flex-grow: 5; }
.diagram.thresholds > div:nth-child(4) { flex-grow: 0; border-right-width: 1px; }

.diagram.thresholds > div > p > strong {
  font: 600 12.5px/1.3 var(--dg-mono);
}

.diagram.thresholds > div:nth-child(1) > p:first-child::before { content: "floor"; }
.diagram.thresholds > .retr > p:first-child::before { content: "speculation threshold"; color: var(--dg-accent-text); }
.diagram.thresholds > .reuse > p:first-child::before { content: "cache threshold"; }
.diagram.thresholds > div:nth-child(4) > p:first-child::before { content: "ceiling"; }

.diagram.thresholds > .retr {
  border-color: var(--dg-edge);
  border-left-color: var(--dg-accent);
}

.diagram.thresholds > .reuse {
  background: var(--dg-hot);
  color: var(--dg-hot-muted);
}
.diagram.thresholds > .reuse > p > strong { color: var(--dg-hot-text); }
.diagram.thresholds > .reuse > p:first-child::before,
.diagram.thresholds > .reuse .small { color: var(--dg-hot-muted); }

/* ---------- dependency ---------- */

.diagram.dependency > div:first-child > p:first-child::before { content: "artifact"; }
.diagram.dependency > .changed > p:first-child::before { content: "source · changed"; }
.diagram.dependency > div:last-child > p:first-child::before { content: "queue"; }

/* ---------- evidence: source excerpt, bridge, evidence record ---------- */

.diagram.evidence > .source {
  flex: 1.15 1 0;
}

.diagram.evidence > .bridge {
  min-width: 150px;
}

.diagram.evidence > .source > p:first-child::before { content: "source"; }
.diagram.evidence > .record > p:first-child::before { content: "record"; }

.diagram.evidence > .source > p + p {
  margin-top: 8px;
  font: 400 13px/1.5 var(--dg-sans);
  color: var(--dg-ink);
}

.diagram.evidence .mark {
  padding: 0 2px;
  border-bottom: 1px solid var(--dg-accent);
  background: var(--dg-down);
  color: var(--dg-ink);
}

.diagram.evidence > .record > p + p {
  margin-top: 2px;
}

.diagram.evidence > .record > p > strong {
  margin-bottom: 4px;
}

/* ---------- bitemporal: two axes with a drawn bar ---------- */

.diagram.bitemporal {
  gap: 16px;
}

.diagram.bitemporal > div > p {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
}

.diagram.bitemporal > div > p:first-child::before {
  content: "axis";
  flex: 0 0 100%;
}

.diagram.bitemporal > div > p > strong {
  flex: 0 0 100%;
}

.diagram.bitemporal .from,
.diagram.bitemporal .to {
  display: flex;
  align-items: center;
  margin-top: 10px;
  font: 400 10px/1.3 var(--dg-mono);
  color: var(--dg-muted);
  white-space: nowrap;
}

.diagram.bitemporal .from {
  flex: 1 1 auto;
  gap: 8px;
}

.diagram.bitemporal .from::after {
  content: "";
  flex: 1 1 24px;
  height: 0;
  border-top: 1px solid var(--dg-edge);
}

.diagram.bitemporal .to::before {
  content: "";
  width: 6px;
  height: 6px;
  margin-right: 8px;
  background: var(--dg-edge);
}

/* ---------- artifact: type node, connector, field list ---------- */

.diagram.artifact > div:first-child {
  flex: 0 0 auto;
  align-self: center;
  min-width: 190px;
  border-color: var(--dg-hot);
  background: var(--dg-hot);
  color: var(--dg-hot-muted);
}

.diagram.artifact > div:first-child > p:first-child::before {
  content: "type";
  color: var(--dg-hot-muted);
}

.diagram.artifact > div:first-child > p > strong {
  color: var(--dg-hot-text);
}

.diagram.artifact > .fields {
  position: relative;
  flex: 1 1 0;
  min-width: 0;
  display: flex;
  flex-direction: column;
  margin-left: var(--dg-gap);
  border: 1px solid var(--dg-edge);
  background: var(--dg-node);
}

.diagram.artifact > .fields > p {
  padding: 6px 12px;
  border-bottom: 1px solid var(--dg-line);
  font: 400 10.5px/1.5 var(--dg-mono);
  color: var(--dg-ink);
}

.diagram.artifact > .fields > p:last-child {
  border-bottom: 0;
}

.diagram.artifact > .fields::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--dg-gap) - 1px);
  width: calc(var(--dg-gap) - 5px);
  top: calc(50% - 0.5px);
  height: 0;
  border-top: 1px solid var(--dg-edge);
}

.diagram.artifact > .fields::after {
  content: "";
  position: absolute;
  left: -7px;
  top: 50%;
  width: 6px;
  height: 6px;
  margin-top: -3px;
  background: var(--dg-edge);
}

/* ---------- stacked layout for narrow columns ---------- */

@media (max-width: 760px) {
  .diagram {
    flex-direction: column;
    align-items: stretch;
  }

  .diagram > div:where(:not(.bridge, .arms, .fields)) {
    flex: 0 0 auto;
  }

  /* connector turns 90 degrees: vertical line at --dg-tab, label to its right */
  .diagram > p,
  .diagram > .bridge {
    min-width: 0;
    min-height: 34px;
    flex-direction: row;
    justify-content: flex-start;
    align-items: center;
    padding: 8px 0 8px calc(var(--dg-tab) + 14px);
    text-align: left;
  }

  .diagram > p::before,
  .diagram > .bridge::before {
    left: calc(var(--dg-tab) - 0.5px);
    right: auto;
    top: 0;
    bottom: 6px;
    width: 0;
    height: auto;
    border-top: 0;
    border-left: 1px solid var(--dg-edge);
  }

  .diagram > p::after,
  .diagram > .bridge::after {
    left: calc(var(--dg-tab) - 3px);
    right: auto;
    top: auto;
    bottom: 0;
    margin: 0;
  }

  .diagram > p > em,
  .diagram > .bridge > p {
    position: static;
    transform: none;
    width: auto;
    max-width: none;
    margin: 0;
  }

  /* chips */
  .diagram.stages > p,
  .diagram.lifecycle > p,
  .diagram.resolution-cascade > p {
    flex-direction: column;
    align-items: stretch;
    row-gap: 0;
  }

  .diagram .step {
    text-align: left;
    white-space: normal;
  }

  .diagram .step:not(:last-child) {
    margin: 0 0 var(--dg-gap);
  }

  .diagram .step:not(:last-child)::before {
    right: auto;
    left: calc(var(--dg-tab) - 0.5px);
    top: 100%;
    width: 0;
    height: calc(var(--dg-gap) - 5px);
    border-top: 0;
    border-left: 1px solid var(--dg-edge);
  }

  .diagram .step:not(:last-child)::after {
    right: auto;
    left: calc(var(--dg-tab) - 3px);
    top: auto;
    bottom: calc(-1 * var(--dg-gap) - 1px);
    margin: 0;
  }

  /* timeline */
  .diagram.timeline > div + div {
    margin: var(--dg-gap) 0 0;
  }

  .diagram.timeline > div + div::before {
    left: calc(var(--dg-tab) - 0.5px);
    top: calc(-1 * var(--dg-gap));
    width: 0;
    height: calc(var(--dg-gap) - 6px);
    border-top: 0;
    border-left: 1px solid var(--dg-edge);
  }

  .diagram.timeline > div + div::after {
    left: calc(var(--dg-tab) - 3px);
    top: -6px;
    margin: 0;
  }

  /* context arms become a wrapping row */
  .diagram.context > .arms {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    justify-content: flex-start;
  }

  .diagram.context > .arms::before {
    flex: 0 0 100%;
  }

  /* thresholds stay a ruler, it fits */
  .diagram.thresholds {
    flex-direction: row;
  }

  /* artifact */
  .diagram.artifact > div:first-child {
    align-self: stretch;
  }

  .diagram.artifact > .fields {
    margin: var(--dg-gap) 0 0;
  }

  .diagram.artifact > .fields::before {
    left: calc(var(--dg-tab) - 0.5px);
    top: calc(-1 * var(--dg-gap) - 1px);
    width: 0;
    height: calc(var(--dg-gap) - 5px);
    border-top: 0;
    border-left: 1px solid var(--dg-edge);
  }

  .diagram.artifact > .fields::after {
    left: calc(var(--dg-tab) - 3px);
    top: -7px;
    margin: 0;
  }
}

/* ---------- hero illustration (index page) ---------- */

.diagram-hero {
  margin: 26px 0 34px;
  padding: 0;
  color: var(--dg-ink);
}

.diagram-hero svg {
  display: block;
  width: 100%;
  height: auto;
  max-height: 220px;
  overflow: visible;
  color: var(--dg-ink);
}

.diagram-hero .hn {
  fill: var(--dg-node);
  stroke: var(--dg-edge);
  stroke-width: 1;
}

.diagram-hero .hn-down {
  fill: var(--dg-down);
  stroke: var(--dg-accent);
}

.diagram-hero .he {
  fill: none;
  stroke: var(--dg-edge);
  stroke-width: 1;
}

.diagram-hero .ht {
  fill: var(--dg-edge);
}

.diagram-hero .ht-down {
  fill: var(--dg-accent);
}

.diagram-hero .hk {
  font: 500 10px var(--dg-mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  fill: var(--dg-muted);
}

.diagram-hero .hk-down {
  fill: var(--dg-accent-text);
}

.diagram-hero .hm {
  font: 600 12.5px var(--dg-sans);
  letter-spacing: -0.005em;
  fill: var(--dg-ink);
}

.diagram-hero figcaption {
  margin-top: 8px;
  font: 400 10.5px/1.5 var(--dg-mono);
  color: var(--dg-muted);
}

/* ---------- furo override ----------
   furo-extensions.css ships `[role=main] .container { padding-left: 0; padding-right: 0 }`.
   Docutils marks the diagram frame and colon-fence `card` nodes as .container, and that
   two-part selector outranks the single-class rules above, so restate their side padding. */

[role="main"] .diagram.container {
  padding-left: 20px;
  padding-right: 20px;
}

[role="main"] .diagram > .card.container:where(:not(.bridge, .arms, .fields)) {
  padding-left: 12px;
  padding-right: 12px;
}