/* =====================================================================
   URL comparison diagram
   Used by search-and-information-architecture. Two-column "before /
   after" comparison, plus optional impact/migration-principles/outcome
   sections below for diagrams whose data includes them. The source PNG
   uses hand-drawn curved connector lines and a brick-wall/lock
   illustration for the inherited-structure dead end, simplified to the
   same list+card vocabulary as the other diagrams and a generic
   "Category / Product" example instead of the literal one, both to
   avoid reproducing illustration tricks (same call as the
   need-to-options rebuild) and because a concrete retail example risks
   revealing sector/employer, which this site's case studies
   deliberately avoid (see case_study_voice memory). Functional colour
   (red/green) on the two URL examples, and on the impact/outcome
   sections where present — genuine before/after moments, not
   decorative.
   ===================================================================== */

.ucdiagram {
  --uc-bg: #1a1810;
  --uc-card: #221f16;
  --uc-text: #f4efe3;
  --uc-muted: #948d7c;
  --uc-border: #3a3527;
  --uc-radius: 16px;
  --uc-problem: #b8563f;
  --uc-solution: #7c9a5b;

  position: relative;
  background: var(--uc-bg);
  color: var(--uc-text);
  border: 1px solid var(--uc-border);
  border-radius: var(--uc-radius);
  padding: var(--space-6);
  margin: var(--space-4) 0;
  overflow-x: hidden;
}

@media (min-width: 48rem) {
  .ucdiagram { padding: var(--space-8); }
}

@media (min-width: 64rem) {
  .ucdiagram { padding: var(--space-12); }
}

.ucdiagram .diagram-icon {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  stroke-width: 1.5;
  fill: none;
  flex-shrink: 0;
}

.uc-section-head {
  margin-bottom: var(--space-6);
}

.uc-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--uc-muted);
  margin: 0 0 var(--space-2);
}

.ucdiagram h2 {
  font-family: var(--font-display);
  color: var(--uc-text);
  font-size: var(--fs-lg);
  line-height: var(--lh-snug);
  margin: 0 0 var(--space-2);
}

@media (min-width: 48rem) {
  .ucdiagram h2 { font-size: var(--fs-xl); }
}

@media (min-width: 64rem) {
  .ucdiagram h2 { font-size: var(--fs-2xl); }
}

.uc-subtitle {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--uc-muted);
  margin: 0;
}

/* Columns -------------------------------------------------------------- */

.uc-columns {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

@media (min-width: 64rem) {
  .uc-columns {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
  }
}

.uc-column {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  min-width: 0;
}

.uc-column-title {
  font-family: var(--font-body);
  font-size: var(--fs-md);
  font-weight: 600;
  margin: 0;
}

.uc-column-subtitle {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--uc-muted);
  margin: calc(-1 * var(--space-2)) 0 0;
}

/* Path chain (left column) ---------------------------------------------- */

.uc-path-chain {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.uc-path-segment {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  min-width: 0;
  background: var(--uc-card);
  border: 1px solid var(--uc-border);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--uc-muted);
  word-break: break-word;
}

.uc-path-segment-locked {
  color: var(--uc-text);
  border-color: var(--uc-problem);
}

.uc-path-segment-locked .diagram-icon {
  color: var(--uc-problem);
  width: 16px;
  height: 16px;
}

/* Entry routes + destination (right column) ------------------------------ */

.uc-entry-routes {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.uc-entry-routes li {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--uc-card);
  border: 1px solid var(--uc-border);
  border-radius: 999px;
  padding: var(--space-1) var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--uc-muted);
}

.uc-entry-routes .diagram-icon {
  width: 16px;
  height: 16px;
  color: var(--uc-text);
}

.uc-destination {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-1);
  background: var(--uc-card);
  border: 1px solid var(--uc-solution);
  border-radius: var(--uc-radius);
  padding: var(--space-4);
}

.uc-destination .diagram-icon {
  color: var(--uc-solution);
}

.uc-destination-url {
  font-family: var(--font-mono);
  font-weight: 500;
}

.uc-destination-caption {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--uc-muted);
}

/* Shared item lists (problems / benefits) --------------------------------- */

.uc-item-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.uc-item-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
}

.uc-item-list .diagram-icon {
  color: var(--uc-text);
  margin-top: 0.15rem;
}

.uc-item-list li > div {
  display: flex;
  flex-direction: column;
}

.uc-item-title {
  font-weight: 500;
  font-size: var(--fs-sm);
}

.uc-item-desc {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--uc-muted);
}

/* URL bars ---------------------------------------------------------------- */

.uc-url-bar {
  margin-top: auto;
  max-width: 100%;
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--uc-border);
}

.uc-url-example {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  word-break: break-word;
}

.uc-url-bar.uc-accent-problem {
  border-color: var(--uc-problem);
  color: var(--uc-problem);
}

.uc-url-bar.uc-accent-solution {
  border-color: var(--uc-solution);
  color: var(--uc-solution);
}

.uc-url-caption {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--uc-muted);
  margin: 0;
}

/* Lower sections — impact / migration principles ---------------------- */

.uc-lower {
  margin-top: var(--space-8);
  padding-top: var(--space-8);
  border-top: 1px solid var(--uc-border);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

@media (min-width: 64rem) {
  .uc-lower {
    grid-template-columns: 1fr 2fr;
  }
}

.uc-impact-icon {
  color: var(--uc-problem);
}

.uc-migration-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}

@media (min-width: 30rem) {
  .uc-migration-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 64rem) {
  .uc-migration-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.uc-migration-step {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  background: var(--uc-card);
  border: 1px solid var(--uc-border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}

.uc-migration-step .diagram-icon {
  color: var(--uc-text);
}

/* Outcome ---------------------------------------------------------------- */

.uc-outcome {
  margin-top: var(--space-8);
  padding-top: var(--space-8);
  border-top: 1px solid var(--uc-border);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.uc-outcome-panel {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  background: var(--uc-card);
  border: 1px solid var(--uc-border);
  border-radius: var(--uc-radius);
  padding: var(--space-4);
}

.uc-outcome-panel .diagram-icon {
  color: var(--uc-text);
}

.uc-outcome-panel h3 {
  font-family: var(--font-body);
  font-size: var(--fs-md);
  font-weight: 600;
  margin: 0;
}

.uc-outcome-panel p {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--uc-muted);
  margin: 0;
}

.uc-outcome-items {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.uc-outcome-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-sm);
  font-weight: 500;
}

.uc-outcome-item .diagram-icon {
  color: var(--uc-solution);
}

@media (min-width: 48rem) {
  .uc-outcome {
    flex-direction: row;
    align-items: stretch;
  }

  .uc-outcome-panel {
    flex: 1;
  }

  .uc-outcome-items {
    flex: 1;
    flex-direction: row;
    flex-wrap: wrap;
  }

  .uc-outcome-item {
    flex: 1 1 45%;
  }
}