/* trace.css: Trace (component 17). Owner: group E (P2.T8). Tokens only (L-01), logical properties only (L-04), box-shadow only var(--shadow-overlay) on overlays (L-03).
   Anatomy and dimensions: 02 "17. Trace". The rail is an SVG drawn by scripts/components/trace.js; a node is 14 px, the rail 1.5 px. */
[data-component="trace"] {
  position: relative;
  display: block;
  inline-size: 100%;
  color: var(--text);
}

[data-component="trace"] .trace__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}

/* One step: node, text, optional value, optional disclosure toggle; the field list spans below. */
[data-component="trace"] .trace__step {
  position: relative;
  display: grid;
  grid-template-columns: var(--size-node) minmax(0, 1fr) auto;
  column-gap: var(--space-4);
  align-items: start;
  max-inline-size: none;
  padding-block: 0 calc(var(--space-4) + (var(--size-row) - var(--size-row-compact))); /* density step, CL-145 */
  padding-inline: var(--space-3);
  border-radius: var(--radius-control);
}
[data-component="trace"] .trace__step:hover,
[data-component="trace"] .trace__step[data-force="hover"] { background: var(--surface-hover); }
[data-component="trace"] .trace__step[data-expandable="true"] { cursor: pointer; }
[data-component="trace"] .trace__step:focus-within { background: var(--surface-hover); }

[data-component="trace"] .trace__node {
  position: relative;
  box-sizing: border-box;
  inline-size: var(--size-node);
  block-size: var(--size-node);
  margin-block-start: calc((var(--space-6) - var(--size-node)) / 2);
  border: var(--border-width-rail) solid var(--border-control);
  border-radius: var(--radius-round);
  background: var(--surface);
}
[data-component="trace"] .trace__node[data-tone="brand"] { background: var(--brand); border-color: var(--brand); }
[data-component="trace"] .trace__node[data-tone="good"] { background: var(--good); border-color: var(--good); }
[data-component="trace"] .trace__node[data-tone="warning"] { background: var(--warning); border-color: var(--warning); }
[data-component="trace"] .trace__node[data-tone="critical"] { background: var(--critical); border-color: var(--critical); }
[data-component="trace"] .trace__node[data-highlight="true"] { border-color: var(--critical); }

[data-component="trace"] .trace__main { min-inline-size: 0; }
[data-component="trace"] .trace__head { margin: 0; font: var(--type-body); font-weight: 600; min-block-size: var(--space-6); }
[data-component="trace"] .trace__name { color: var(--text); text-decoration: none; overflow-wrap: anywhere; }
[data-component="trace"] a.trace__name { color: var(--brand); }
[data-component="trace"] a.trace__name:hover { text-decoration: underline; }
[data-component="trace"] .trace__line { margin: 0; color: var(--text-secondary); font: var(--type-label); font-weight: 400; overflow-wrap: anywhere; }

[data-component="trace"] .trace__top { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; column-gap: var(--space-4); }
[data-component="trace"] .trace__top .trace__head { flex: 1 1 var(--size-skeleton-label-w); min-inline-size: 0; }
[data-component="trace"] .trace__value {
  margin-inline-start: auto;
  font: var(--type-table);
  font-variant-numeric: tabular-nums lining-nums;
  text-align: end;
  min-block-size: var(--space-6);
}
[data-component="trace"] .trace__step[data-highlight="true"] .trace__value { color: var(--critical); }

[data-component="trace"] .trace__toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  inline-size: var(--size-target-min);
  block-size: var(--size-target-min);
  margin-inline-start: var(--space-2);
  padding: 0;
  border: 0;
  border-radius: var(--radius-control);
  background: transparent;
  color: var(--text-secondary);
}
[data-component="trace"] .trace__toggle:hover { background: var(--surface-hover); color: var(--text); }
[data-component="trace"] .trace__toggle:active { background: var(--border); }
[data-component="trace"] .trace__toggle:focus-visible { outline-offset: calc(-1 * var(--border-width-thick)); }
[data-component="trace"] .trace__toggle .icon { transition: transform var(--duration-base) var(--ease-standard); }
[data-component="trace"] .trace__toggle[aria-expanded="true"] .icon { transform: scaleY(-1); }

[data-component="trace"] .trace__fields {
  grid-column: 2 / -1;
  padding-block-start: var(--space-3);
  animation: trace-open var(--duration-base) var(--ease-standard);
}
[data-component="trace"] .trace__fields[hidden] { display: none; }
[data-component="trace"] .trace__fields dl { margin: 0; display: grid; gap: var(--space-2); }
[data-component="trace"] .trace__field { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: var(--space-4); font: var(--type-caption); }
[data-component="trace"] .trace__field dt { color: var(--text-secondary); }
[data-component="trace"] .trace__field dd { margin: 0; color: var(--text); overflow-wrap: anywhere; }
@keyframes trace-open { from { opacity: 0; } to { opacity: 1; } }

/* The rail: one SVG layer behind the nodes; solid, or dashed below a step that inherits without change. */
[data-component="trace"] .trace__rails {
  position: absolute;
  inset: 0;
  inline-size: 100%;
  block-size: 100%;
  overflow: visible;
  pointer-events: none;
}
[data-component="trace"] .trace__rails line { stroke: var(--border-strong); stroke-width: var(--border-width-rail); }
[data-component="trace"] .trace__rails line[data-dashed="true"] { stroke-dasharray: 3 3; }
/* The reveal: clips in from the block-start over --duration-trace, once per page load per Trace; nodes are not part of it. */
[data-component="trace"] .trace__rails[data-reveal="pending"] { clip-path: inset(0 0 100% 0); }
[data-component="trace"] .trace__rails[data-reveal="running"],
[data-component="trace"] .trace__rails[data-reveal="done"] { clip-path: inset(0); }
[data-component="trace"] .trace__rails[data-reveal="running"] { transition: clip-path var(--duration-trace) var(--ease-standard); }
@media (prefers-reduced-motion: reduce) {
  [data-component="trace"] .trace__rails[data-reveal] { clip-path: inset(0); transition: none; }
  [data-component="trace"] .trace__fields { animation: none; }
}

/* The conclusion box: tinted with the answer, a 1 px border in the tone, radius-control. */
[data-component="trace"] .trace__conclusion {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  margin-block-start: var(--space-2);
  padding: var(--space-4) var(--space-5);
  border: var(--border-width) solid var(--brand);
  border-radius: var(--radius-control);
  background: var(--brand-subtle);
  color: var(--text);
}
[data-component="trace"] .trace__conclusion[data-tone="good"] { background: var(--good-subtle); border-color: var(--good); }
[data-component="trace"] .trace__conclusion[data-tone="warning"] { background: var(--warning-subtle); border-color: var(--warning); }
[data-component="trace"] .trace__conclusion[data-tone="critical"] { background: var(--critical-subtle); border-color: var(--critical); }
[data-component="trace"] .trace__conclusion[data-tone="neutral"] { background: var(--surface-sunken); border-color: var(--border-strong); }
[data-component="trace"] .trace__conclusion-text { display: grid; grid-template-columns: auto minmax(0, 1fr); column-gap: var(--space-3); align-items: start; min-inline-size: 0; flex: 1 1 var(--size-popover-sm); }
[data-component="trace"] .trace__conclusion-text .icon { color: var(--critical); margin-block-start: var(--space-1); grid-row: 1; }
[data-component="trace"] .trace__conclusion-title { grid-column: 2; margin: 0; font: var(--type-sub); overflow-wrap: anywhere; }
[data-component="trace"] .trace__conclusion-text:not(:has(.icon)) > * { grid-column: 1 / -1; }
[data-component="trace"] .trace__conclusion-source { grid-column: 2; margin: 0; color: var(--text-secondary); font: var(--type-caption); overflow-wrap: anywhere; }
[data-component="trace"] .trace__conclusion-text:not(:has(.icon)) .trace__conclusion-source { grid-column: 1 / -1; }

/* Compact form (info popover, quick view): 8 px step padding and a conclusion on one line. */
[data-component="trace"][data-compact="true"] .trace__step { padding-block-end: calc(var(--space-3) + (var(--size-row) - var(--size-row-compact))); }
[data-component="trace"][data-compact="true"] .trace__conclusion { flex-wrap: nowrap; padding-block: var(--space-3); }
[data-component="trace"][data-compact="true"] .trace__conclusion-text { display: flex; flex-wrap: wrap; align-items: baseline; gap: var(--space-2) var(--space-4); }
[data-component="trace"][data-compact="true"] .trace__conclusion-title { font: var(--type-button); }

/* Loading: three skeleton step rows. Error: an inline message with a retry. */
[data-component="trace"] .trace__skeleton { display: grid; gap: var(--space-5); padding-inline: var(--space-3); }
[data-component="trace"] .trace__skeleton-row { display: grid; grid-template-columns: var(--size-node) minmax(0, 1fr); gap: var(--space-4); align-items: start; }
[data-component="trace"] .trace__skeleton-node { inline-size: var(--size-node); block-size: var(--size-node); border-radius: var(--radius-round); background: var(--border); }
[data-component="trace"] .trace__skeleton-bars { display: grid; gap: var(--space-3); }
[data-component="trace"] .trace__skeleton-bar { display: block; block-size: var(--size-skeleton-line); border-radius: var(--radius-bar); background: var(--border); animation: trace-pulse var(--duration-pulse) var(--ease-standard) infinite alternate; }
[data-component="trace"] .trace__skeleton-bar--a { inline-size: var(--size-skeleton-trace-a-w); }
[data-component="trace"] .trace__skeleton-bar--b { inline-size: var(--size-skeleton-trace-b-w); max-inline-size: 100%; }
@keyframes trace-pulse { from { opacity: 1; } to { opacity: 0.5; } }
@media (prefers-reduced-motion: reduce) { [data-component="trace"] .trace__skeleton-bar { animation: none; } }

[data-component="trace"] .trace__error {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  border: var(--border-width) solid var(--border);
  border-inline-start: var(--border-width-accent) solid var(--critical);
  border-radius: var(--radius-control);
  background: var(--critical-subtle);
}
[data-component="trace"] .trace__error .icon { color: var(--critical); }
[data-component="trace"] .trace__error p { margin: 0; flex: 1 1 var(--size-popover-sm); font: var(--type-body); }

/* Kitchen sink sample widths (the demo only): a drawer-sized and a context-rail-sized column. */
.trace-demo { inline-size: 100%; max-inline-size: var(--size-popover-lg); min-inline-size: 0; }
.trace-demo[data-width="sm"] { max-inline-size: var(--size-context-rail); }