/* Knowledge Store — acl-identity workzone diagrams.
   Page-bespoke pieces only: a resolution ladder (ks-chain) walking
   user → identity → principal → group → entity, and a three-role ownership
   strip (ks-roles: Harvester writes · KS stores · Query Engine applies).
   The shared DB-table matrix (dm-tbl · dm-fields · dm-c · dm-badge), the
   v1/v2 split (dm-split) and the band accent (stk-layer--ks) live in the
   module sheet ../knowledge-store.css.
   Static — no hover affordance (README §Hover).
   Loaded by _workzone/acl-identity.html on top of ../../module.css
   + ../knowledge-store.css + ../../layered-stack.css.
   Placement convention: docs/architecture/README.md §Styling. */

/* ════════════════ RESOLUTION LADDER ════════════════ from a platform user
   to the entities they may see — one hop per row, the join key on the edge. */
.ks-chain {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  margin: 1.25rem 0;
}

.ks-chain__hop {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.ks-chain__node {
  flex: 0 0 auto;
  font-family: var(--mono);
  font-size: 0.74rem;
  font-weight: 700;
  color: var(--text);
  padding: 0.3rem 0.7rem;
  background: var(--surface);
  border: 1px solid var(--tint-25);
  border-left: 3px solid var(--accent);
  border-radius: var(--tag-radius);
  white-space: nowrap;
}

/* Auth-owned node (the platform account entering the chain). */
.ks-chain__node--auth {
  border-left-color: var(--s2);
  color: var(--s2);
}

/* Terminal node — the entity the user is allowed to reach. */
.ks-chain__node--goal {
  background: var(--tint-6);
  border-left-color: var(--accent);
  color: var(--accent);
}

.ks-chain__edge {
  flex: 1 1 7rem;
  position: relative;
  text-align: center;
  min-height: 1.1rem;
}

.ks-chain__edge::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 0;
  right: 0.4rem;
  height: 1px;
  background: var(--accent-muted);
}

.ks-chain__edge::after {
  content: "▸";
  position: absolute;
  right: -0.15rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--accent);
  font-size: 0.7rem;
  line-height: 1;
}

.ks-chain__key {
  position: relative;
  background: var(--paper);
  padding: 0 0.4rem;
  font-family: var(--mono);
  font-size: 0.62rem;
  color: var(--text-muted);
  white-space: nowrap;
}

/* ════════════════ OWNERSHIP STRIP ════════════════ who writes / stores /
   applies — the data plane split across three modules. */
.ks-roles {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.35rem;
}

.ks-roles__col {
  flex: 1;
  padding: 0.85rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-top: 3px solid var(--dot);
  border-radius: var(--radius-md);
}

.ks-roles__col--src {
  border-top-color: var(--s2);
}
.ks-roles__col--here {
  border-top-color: var(--accent);
  background: var(--tint-6);
}
.ks-roles__col--dst {
  border-top-color: var(--s4);
}

.ks-roles__who {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text);
}

.ks-roles__act {
  font-family: var(--mono);
  font-size: 0.62rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin: 0.1rem 0 0.4rem;
}

.ks-roles__col--here .ks-roles__act {
  color: var(--accent);
}

.ks-roles__d {
  font-size: 0.76rem;
  color: var(--text-dim);
  line-height: 1.5;
}

@media (max-width: 640px) {
  .ks-roles {
    flex-direction: column;
  }
}