/*
 * Mneme HQ — Canonical Diagram Primitives
 *
 * Four self-contained HTML+CSS diagram primitives, all scoped under
 * .mneme-diagram. See docs/contributing/diagram-conventions.md for the visual
 * language spec and the no-invented-capabilities rule.
 *
 * Theme tokens (--accent, --teal, --surface, etc.) are defined in each
 * page's inline <style> block. This file relies on them but does not
 * redefine them.
 */

/* ============================================================
 * Base wrapper
 * ============================================================ */

.mneme-diagram {
  margin: 0;
  font-family: 'Inter', sans-serif;
  color: var(--text);
  position: relative;
}

.mneme-diagram__title {
  font-family: 'DM Mono', monospace;
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 400;
  margin: 0 0 1.1rem 0;
}

.mneme-diagram__sr-desc {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ============================================================
 * Primitive 1: Governance propagation
 * Three-row layout: pipeline → bus → consumers, with equivalence line
 * ============================================================ */

.mneme-diagram--propagation {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.5rem;
}

.mneme-diagram--propagation .pipeline {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 12px;
  align-items: stretch;
}

.mneme-diagram--propagation .node {
  background: var(--surface2);
  border: 1px solid var(--border2);
  border-radius: 6px;
  padding: 0.7rem 0.55rem;
  text-align: center;
}

.mneme-diagram--propagation .node--source {
  background: rgba(139, 224, 200, 0.05);
  border-color: var(--teal);
}

.mneme-diagram--propagation .node--active {
  background: rgba(200, 240, 96, 0.05);
  border-color: var(--accent);
  border-width: 1.5px;
}

.mneme-diagram--propagation .node--gate {
  background: var(--accent);
  border-color: var(--accent);
}

.mneme-diagram--propagation .node--gate .n-title,
.mneme-diagram--propagation .node--gate .n-sub {
  color: #0c0c0d;
}

.mneme-diagram--propagation .n-eyebrow {
  font-family: 'DM Mono', monospace;
  font-size: 0.66rem;
  letter-spacing: 0.06em;
  margin-bottom: 0.25rem;
}

.mneme-diagram--propagation .node--source .n-eyebrow { color: var(--teal); }
.mneme-diagram--propagation .node--active .n-eyebrow { color: var(--accent); }

.mneme-diagram--propagation .n-title {
  font-family: 'Inter', sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.2rem;
}

.mneme-diagram--propagation .n-sub {
  font-family: 'DM Mono', monospace;
  font-size: 0.66rem;
  color: var(--muted);
  line-height: 1.4;
}

.mneme-diagram--propagation .bus {
  position: relative;
  height: 36px;
}

.mneme-diagram--propagation .bus::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 1.5px;
  background: var(--accent);
  transform: translateX(-50%);
}

.mneme-diagram--propagation .consumers {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 6px;
  position: relative;
  padding-top: 10px;
}

.mneme-diagram--propagation .consumers::before {
  content: '';
  position: absolute;
  left: 10%;
  right: 10%;
  top: 0;
  height: 1.5px;
  background: var(--accent);
}

.mneme-diagram--propagation .consumer {
  position: relative;
  padding-top: 8px;
}

.mneme-diagram--propagation .consumer::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  width: 1.5px;
  height: 8px;
  background: var(--accent);
  transform: translateX(-50%);
}

.mneme-diagram--propagation .equiv {
  font-family: 'DM Mono', monospace;
  font-size: 0.72rem;
  color: var(--accent);
  text-align: center;
  margin-top: 1.1rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--border);
  line-height: 1.6;
}

.mneme-diagram--propagation .equiv small {
  display: block;
  font-size: 0.66rem;
  color: var(--muted);
  margin-top: 0.25rem;
}

@media (max-width: 640px) {
  /* Pipeline collapses to a single vertical stack. */
  .mneme-diagram--propagation .pipeline {
    grid-template-columns: 1fr;
  }
  /* Consumers also collapse to a single vertical stack. The 2-column
   * layout with a span-2 gate cell left empty grid slots and orphaned
   * connector stubs whose horizontal bar lived only above row 1. The
   * fan-out argument is communicated by the figcaption and structural
   * flow (3 pipeline cells -> bus -> 5 consumer cells stacked); the
   * horizontal bar and per-cell stubs are decorative and hidden. */
  .mneme-diagram--propagation .consumers {
    grid-template-columns: 1fr;
    gap: 8px;
    padding-top: 0;
  }
  .mneme-diagram--propagation .consumers::before,
  .mneme-diagram--propagation .consumer::before {
    display: none;
  }
  .mneme-diagram--propagation .consumer {
    padding-top: 0;
  }
}

/* ============================================================
 * Primitive 2: Enforcement checkpoints
 * Five lifecycle checkpoints, bracketed into pre- and post-generation,
 * with the strategic hard gate (CI check) visually marked.
 * ============================================================ */

.mneme-diagram--checkpoints {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.5rem;
}

.mneme-diagram--checkpoints .brackets {
  display: grid;
  grid-template-columns: 2fr 3fr;
  gap: 12px;
  margin-bottom: 0.5rem;
}

.mneme-diagram--checkpoints .bracket-label {
  font-family: 'DM Mono', monospace;
  font-size: 0.66rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-align: center;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--border2);
}

.mneme-diagram--checkpoints .bracket-label.pre {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.mneme-diagram--checkpoints .bracket-label.post {
  color: var(--muted);
}

.mneme-diagram--checkpoints .row {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 6px;
  align-items: stretch;
  position: relative;
}

.mneme-diagram--checkpoints .step {
  background: var(--surface2);
  border: 1px solid var(--border2);
  border-radius: 6px;
  padding: 0.7rem 0.55rem;
  text-align: center;
  position: relative;
}

.mneme-diagram--checkpoints .step--active {
  background: rgba(200, 240, 96, 0.05);
  border-color: var(--accent);
  border-width: 1.5px;
}

.mneme-diagram--checkpoints .step--gate {
  background: var(--accent);
  border-color: var(--accent);
}

.mneme-diagram--checkpoints .step--gate .s-title,
.mneme-diagram--checkpoints .step--gate .s-sub {
  color: #0c0c0d;
}

.mneme-diagram--checkpoints .step--muted {
  border-style: dashed;
  border-color: var(--border);
  background: var(--surface);
}

.mneme-diagram--checkpoints .s-title {
  font-family: 'Inter', sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.25rem;
}

.mneme-diagram--checkpoints .s-sub {
  font-family: 'DM Mono', monospace;
  font-size: 0.66rem;
  color: var(--muted);
  line-height: 1.4;
}

.mneme-diagram--checkpoints .step + .step::before {
  content: '\2192';
  position: absolute;
  left: -10px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--muted);
  font-family: 'DM Mono', monospace;
  font-size: 0.85rem;
  line-height: 1;
}

@media (max-width: 640px) {
  .mneme-diagram--checkpoints .brackets {
    grid-template-columns: 1fr;
    gap: 6px;
  }
  .mneme-diagram--checkpoints .row {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  .mneme-diagram--checkpoints .step + .step::before {
    content: '\2193';
    left: 50%;
    top: -10px;
    transform: translateX(-50%);
  }
}

/* ============================================================
 * Primitive 3: Provenance chain
 * Six numbered links from authoring ADR to enforcement event,
 * plus a citable-chain summary trailer.
 * ============================================================ */

.mneme-diagram--chain {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.5rem;
}

.mneme-diagram--chain .chain {
  display: grid;
  /* minmax(0, 1fr) so long content (l-id strings like
   * "predicate(decision, diff) -> block") wraps within its cell
   * rather than forcing its column wider than its siblings. */
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.mneme-diagram--chain .link {
  background: var(--surface2);
  border: 1px solid var(--border2);
  border-radius: 6px;
  padding: 0.7rem 0.55rem;
  position: relative;
}

.mneme-diagram--chain .link--source {
  background: rgba(139, 224, 200, 0.05);
  border-color: var(--teal);
}

.mneme-diagram--chain .link--active {
  background: rgba(200, 240, 96, 0.05);
  border-color: var(--accent);
  border-width: 1.5px;
}

.mneme-diagram--chain .link + .link::before {
  content: '\2192';
  position: absolute;
  left: -10px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--accent);
  font-family: 'DM Mono', monospace;
  font-size: 0.85rem;
  line-height: 1;
}

.mneme-diagram--chain .l-num {
  font-family: 'DM Mono', monospace;
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 0.2rem;
}

.mneme-diagram--chain .l-type {
  font-family: 'DM Mono', monospace;
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.3rem;
  line-height: 1.3;
}

.mneme-diagram--chain .link--source .l-type {
  color: var(--teal);
}

.mneme-diagram--chain .l-id {
  font-family: 'Inter', sans-serif;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.3rem;
  line-height: 1.35;
  /* Some l-id values contain long un-breakable tokens such as
   * "predicate(decision," that would otherwise force the cell wider
   * than its siblings. anywhere lets the browser break mid-token. */
  overflow-wrap: anywhere;
}

.mneme-diagram--chain .l-meta {
  font-family: 'DM Mono', monospace;
  font-size: 0.6rem;
  color: var(--muted);
  line-height: 1.45;
}

.mneme-diagram--chain .citation {
  margin-top: 1.1rem;
  padding: 0.85rem 1rem;
  background: rgba(139, 224, 200, 0.05);
  border: 1px solid var(--teal);
  border-radius: 6px;
}

.mneme-diagram--chain .citation-label {
  font-family: 'DM Mono', monospace;
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 0.5rem;
}

.mneme-diagram--chain .citation-line {
  font-family: 'DM Mono', monospace;
  font-size: 0.72rem;
  color: var(--text);
  line-height: 1.7;
  overflow-wrap: anywhere;
}

.mneme-diagram--chain .citation-summary {
  font-family: 'DM Mono', monospace;
  font-size: 0.62rem;
  color: var(--muted);
  margin-top: 0.5rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
  line-height: 1.55;
}

@media (max-width: 640px) {
  .mneme-diagram--chain .chain {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  .mneme-diagram--chain .link + .link::before {
    content: '\2193';
    left: 50%;
    top: -10px;
    transform: translateX(-50%);
  }
  .mneme-diagram--chain .citation-line {
    font-size: 0.66rem;
  }
}

/* ============================================================
 * Primitive 4: Architectural drift cascade
 * Five schematic tier rows showing compounding drift across
 * sessions. Bar widths are illustrative (20/40/60/80/100%); no
 * specific violation counts or benchmark figures appear in the
 * markup. See /benchmark/ for measured rates.
 *
 * Note on rgba values: the rgba(168, 168, 184, X) tier shades
 * derive from #a8a8b8, the --muted token. CSS does not natively
 * interpolate var() into rgba() without color-mix(), and we are
 * not pinning evergreen-only browser support yet. These rgba
 * literals are intentional theme-token derivatives, not stray hex.
 * ============================================================ */

.mneme-diagram--cascade {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.5rem;
}

.mneme-diagram--cascade .tier {
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 12px;
  align-items: center;
  margin-bottom: 8px;
}

.mneme-diagram--cascade .tier:last-child {
  margin-bottom: 0;
}

.mneme-diagram--cascade .t-session {
  font-family: 'DM Mono', monospace;
  font-size: 0.78rem;
  color: var(--muted);
  letter-spacing: 0.04em;
}

.mneme-diagram--cascade .t-body {
  position: relative;
  height: 44px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
}

.mneme-diagram--cascade .t-bar {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  background: rgba(168, 168, 184, 0.1);
  border-right: 1px solid var(--border2);
}

/* Schematic widths increase across tiers; no measured units. */
.mneme-diagram--cascade .t-bar--w1 { width: 20%; }
.mneme-diagram--cascade .t-bar--w2 { width: 40%; background: rgba(168, 168, 184, 0.15); }
.mneme-diagram--cascade .t-bar--w3 { width: 60%; background: rgba(168, 168, 184, 0.2); }
.mneme-diagram--cascade .t-bar--w4 { width: 80%; background: rgba(168, 168, 184, 0.25); border-right-style: dashed; }
.mneme-diagram--cascade .t-bar--w5 { width: 100%; background: rgba(168, 168, 184, 0.3); border-right-style: dashed; }

.mneme-diagram--cascade .t-label {
  position: absolute;
  left: 0.9rem;
  top: 50%;
  transform: translateY(-50%);
  font-family: 'Inter', sans-serif;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text);
  z-index: 1;
  white-space: nowrap;
}

@media (max-width: 640px) {
  .mneme-diagram--cascade .tier {
    grid-template-columns: 44px 1fr;
    gap: 8px;
  }
  .mneme-diagram--cascade .t-label {
    font-size: 0.74rem;
  }
}