/* diagram-system.css
   Build-time compiled diagram panels.

   Contract:
   - Diagram content is compiled at build time from src/diagrams data.
   - Diagrams are structural grid layouts, not absolute-positioned bubbles.
   - CSS owns visual tone and responsive recomposition only.
   - Runtime JS is not required to prevent overlap.
*/

:root {
  --diagram-panel-gap: clamp(0.82rem, 0.64rem + 0.52vw, 1.08rem);
  --diagram-plate-radius: var(--plate-field-radius, 1.08rem);
  --diagram-plate-inset: clamp(1rem, 0.78rem + 0.72vw, 1.38rem);
  --diagram-plate-min: clamp(13.8rem, 24vw, 17.6rem);
  --diagram-node-min-block: var(--plate-node-min-block, 2.12rem);
  --diagram-node-pad-x: clamp(0.72rem, 0.56rem + 0.42vw, 0.96rem);
  --diagram-node-pad-y: 0.4rem;
  --diagram-node-radius: var(--plate-node-radius, 999px);
  --diagram-node-font: var(--plate-node-font, clamp(0.76rem, 0.68rem + 0.35vw, 0.92rem));
  --diagram-node-ink: var(--plate-node-ink, var(--color-title, #132947));
  --diagram-node-border: var(--plate-node-border-strong, rgba(33, 95, 134, 0.18));
  --diagram-node-surface-top: var(--plate-node-surface-top, rgba(255, 255, 255, 0.995));
  --diagram-node-surface-bottom: var(--plate-node-surface-bottom, rgba(238, 246, 248, 0.975));
  --diagram-node-shadow: 0 0.24rem 0.6rem rgba(17, 37, 61, 0.09), inset 0 1px 0 rgba(255, 255, 255, 0.72);
  --diagram-focus-border: var(--plate-focus-border, rgba(164, 132, 72, 0.24));
  --diagram-focus-surface-top: var(--plate-focus-surface-top, rgba(255, 255, 255, 0.995));
  --diagram-focus-surface-bottom: var(--plate-focus-surface-bottom, rgba(249, 247, 239, 0.975));
  --diagram-dot-teal: var(--plate-dot-teal, rgba(68, 151, 155, 0.26));
  --diagram-dot-gold: var(--plate-dot-gold, rgba(164, 132, 72, 0.25));
  --diagram-route: var(--syn-casing, rgba(164, 132, 72, 0.34));
  --diagram-route-strong: var(--syn-casing-strong, rgba(164, 132, 72, 0.48));
  --diagram-route-soft: color-mix(in srgb, var(--syn-identity, #132947) 18%, transparent);
}

.diagram-panel {
  display: grid;
  gap: var(--diagram-panel-gap);
  align-content: start;
}

.diagram-panel__plate {
  container-type: inline-size;
  position: relative;
  isolation: isolate;
  overflow: hidden;
  box-sizing: border-box;
  min-width: 0;
  min-height: var(--diagram-plate-min);
  padding: var(--diagram-plate-inset);
  border-radius: var(--diagram-plate-radius);
  border: 1px solid var(--panel-plate-border, rgba(19, 41, 71, 0.105));
  background:
    radial-gradient(circle at 24% 12%, rgba(255, 255, 255, 0.96), transparent 32%),
    radial-gradient(circle at 78% 86%, rgba(126, 181, 187, 0.13), transparent 34%),
    linear-gradient(180deg, rgba(250, 253, 253, 0.99), rgba(236, 246, 248, 0.965));
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.62),
    inset 0 -0.65rem 1.2rem rgba(33, 95, 134, 0.04),
    0 0 0 1px rgba(164, 132, 72, 0.035);
}

.diagram-panel__plate::before,
.diagram-panel__plate::after {
  content: "";
  position: absolute;
  pointer-events: none;
  z-index: 0;
}

.diagram-panel__plate::before {
  inset: clamp(0.62rem, 1.8cqi, 0.86rem);
  border-radius: calc(var(--diagram-plate-radius) - 0.18rem);
  border: 1px solid rgba(33, 95, 134, 0.095);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.34), rgba(255, 255, 255, 0.08));
}

.diagram-panel__plate::after {
  left: 10%;
  right: 10%;
  top: 50%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(33, 95, 134, 0.08), transparent);
  opacity: 0.45;
}

.diagram {
  position: relative;
  z-index: 1;
  display: grid;
  align-content: center;
  align-items: center;
  justify-items: center;
  gap: clamp(0.62rem, 1.7cqi, 0.98rem);
  min-width: 0;
  min-height: calc(var(--diagram-plate-min) - (var(--diagram-plate-inset) * 2));
}

.diagram__row {
  display: grid;
  align-items: center;
  justify-items: center;
  width: 100%;
  min-width: 0;
}

.diagram__row--pair {
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(0.78rem, 3.2cqi, 1.5rem);
}

.diagram__row--center {
  grid-template-columns: minmax(0, auto);
}

.diagram__row--linear {
  grid-template-columns: minmax(0, 1fr) minmax(1.3rem, 0.22fr) minmax(0, auto) minmax(1.3rem, 0.22fr) minmax(0, 1fr);
  gap: clamp(0.42rem, 1.8cqi, 0.78rem);
}

.diagram-node {
  box-sizing: border-box;
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  max-width: min(100%, 18rem);
  min-width: 0;
  min-height: var(--diagram-node-min-block);
  padding: var(--diagram-node-pad-y) var(--diagram-node-pad-x);
  border-radius: var(--diagram-node-radius);
  border: 1px solid var(--diagram-node-border);
  background: linear-gradient(180deg, var(--diagram-node-surface-top), var(--diagram-node-surface-bottom));
  box-shadow: var(--diagram-node-shadow);
  color: var(--diagram-node-ink);
  font-family: var(--font-ui);
  font-size: var(--diagram-node-font);
  font-weight: var(--font-weight-bold);
  letter-spacing: -0.012em;
  line-height: 1.12;
  text-align: center;
  white-space: normal;
  text-wrap: balance;
  overflow-wrap: normal;
}

.diagram-node::before {
  content: "";
  flex: 0 0 0.46rem;
  inline-size: 0.46rem;
  block-size: 0.46rem;
  border-radius: 999px;
  border: 2px solid rgba(255, 255, 255, 0.68);
  background: var(--diagram-dot-teal);
  box-shadow: 0 0 0 1px rgba(68, 151, 155, 0.08);
}

.diagram-node--focus {
  max-width: min(100%, 18.5rem);
  border-radius: 0.96rem;
  border-color: var(--diagram-focus-border);
  background: linear-gradient(180deg, var(--diagram-focus-surface-top), var(--diagram-focus-surface-bottom));
  box-shadow:
    0 0.3rem 0.72rem rgba(17, 37, 61, 0.10),
    inset 0 1px 0 rgba(255, 255, 255, 0.72);
}

.diagram-node--focus::before {
  background: var(--diagram-dot-gold);
  box-shadow: 0 0 0 1px rgba(164, 132, 72, 0.10);
}

.diagram-node--lane {
  justify-content: flex-start;
  width: min(100%, 17.5rem);
}

.diagram-connector {
  display: block;
  justify-self: center;
  pointer-events: none;
}

.diagram-connector--vertical {
  inline-size: 2px;
  block-size: clamp(1.25rem, 4.6cqi, 2.2rem);
  border-radius: 999px;
  background: linear-gradient(180deg, var(--diagram-route-soft), var(--diagram-route), var(--diagram-route-soft));
}

.diagram-connector--inline {
  inline-size: 100%;
  min-inline-size: 1.4rem;
  block-size: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--diagram-route-soft), var(--diagram-route), var(--diagram-route-soft));
}

.diagram-connector--accent {
  background: linear-gradient(90deg, var(--diagram-route-soft), var(--diagram-route-strong), var(--diagram-route-soft));
}

.diagram-connector--merge {
  inline-size: min(48%, 11.5rem);
  block-size: clamp(1.35rem, 4.4cqi, 2.25rem);
  border-inline: 2px solid var(--diagram-route);
  border-block-end: 2px solid var(--diagram-route);
  border-radius: 0 0 1.1rem 1.1rem;
  opacity: 0.9;
}

.diagram-connector--split {
  inline-size: min(52%, 12rem);
  block-size: clamp(1.35rem, 4.4cqi, 2.25rem);
  border-inline: 2px solid var(--diagram-route);
  border-block-start: 2px solid var(--diagram-route);
  border-radius: 1.1rem 1.1rem 0 0;
  opacity: 0.9;
}

.diagram--linear-route {
  --diagram-plate-min: clamp(10.5rem, 20vw, 13rem);
}

.diagram--lanes {
  --diagram-plate-min: clamp(14.8rem, 25vw, 18.2rem);
}

.diagram__lane-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(1.4rem, 0.16fr) minmax(0, 0.82fr);
  align-items: center;
  gap: clamp(0.8rem, 2.4cqi, 1.25rem);
  width: 100%;
  min-width: 0;
}

.diagram__lanes {
  display: grid;
  gap: clamp(0.48rem, 1.4cqi, 0.72rem);
  min-width: 0;
}

.diagram__destination {
  display: grid;
  justify-items: center;
  min-width: 0;
}

.diagram-connector--lane-spine {
  inline-size: 2px;
  block-size: min(72%, 9rem);
  min-block-size: 5.5rem;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--diagram-route-soft), var(--diagram-route-strong), var(--diagram-route-soft));
}

.diagram-panel__copy {
  gap: clamp(0.45rem, 0.32rem + 0.34vw, 0.66rem);
}

.diagram-panel__copy .panel-summary {
  max-width: 42rem;
}

.diagram-panel__chips {
  margin-block-start: 0.05rem;
}

.diagram-panel__actions {
  margin-block-start: 0.18rem;
}

@container (max-width: 28rem) {
  .diagram-panel__plate {
    --diagram-plate-inset: clamp(0.86rem, 4cqi, 1.05rem);
    --diagram-node-font: clamp(0.72rem, 3.4cqi, 0.84rem);
    --diagram-node-pad-x: 0.68rem;
  }

  .diagram__row--pair {
    grid-template-columns: minmax(0, 1fr);
    gap: clamp(0.52rem, 2.6cqi, 0.72rem);
  }

  .diagram__row--linear {
    grid-template-columns: minmax(0, 1fr);
    gap: clamp(0.52rem, 2.6cqi, 0.72rem);
  }

  .diagram__row--linear .diagram-connector--inline {
    inline-size: 2px;
    min-inline-size: 0;
    block-size: 1.45rem;
    background: linear-gradient(180deg, var(--diagram-route-soft), var(--diagram-route), var(--diagram-route-soft));
  }

  .diagram-connector--merge,
  .diagram-connector--split {
    inline-size: 2px;
    block-size: 1.45rem;
    border: 0;
    border-radius: 999px;
    background: linear-gradient(180deg, var(--diagram-route-soft), var(--diagram-route), var(--diagram-route-soft));
  }

  .diagram__lane-grid {
    grid-template-columns: minmax(0, 1fr);
    justify-items: center;
  }

  .diagram__lanes,
  .diagram__destination {
    width: 100%;
  }

  .diagram-connector--lane-spine {
    inline-size: 2px;
    min-block-size: 1.6rem;
    block-size: 1.6rem;
  }

  .diagram-node,
  .diagram-node--focus,
  .diagram-node--lane {
    width: auto;
    max-width: min(100%, 18rem);
  }
}

@media (max-width: 760px) {
  .diagram-panel {
    gap: 0.72rem;
  }

  .diagram-panel__plate {
    border-radius: 0.95rem;
  }
}

/* =========================================================
   Spatial Registration Compatibility — Round 3
   Compiled diagrams remain build-time/CSS-led. These hooks only expose
   the shared spatial vocabulary and debug bounds; they do not convert
   diagrams into runtime absolute-positioned plate objects.
   ========================================================= */
.diagram-panel[data-spatial-compatible='compiled-diagram'] {
  --diagram-spatial-debug-line: rgba(43, 130, 139, 0.42);
}

body[data-spatial-debug='bounds'] .diagram-panel[data-spatial-compatible='compiled-diagram'] {
  outline: 1px dashed var(--diagram-spatial-debug-line);
  outline-offset: 3px;
}

body[data-spatial-debug='bounds'] .diagram-panel[data-spatial-compatible='compiled-diagram'] [data-spatial-zone='diagram-plate'] {
  outline: 1px dashed rgba(200, 177, 118, 0.48);
  outline-offset: -2px;
}

body[data-spatial-debug='bounds'] .diagram-panel[data-spatial-compatible='compiled-diagram'] [data-spatial-zone='diagram-node'] {
  outline: 1px dotted rgba(19, 41, 71, 0.34);
  outline-offset: 2px;
}