/* Feature-flow kit (flow-*) — the metro-storyboard primitives for
   multi-screen feature flows. The happy path as a transit line: stations
   (.flow-stop) are screen nodes, joined by segments (.flow-seg) labelled
   with the transition that fires them. The station NAME is the screen
   link (feature-local sibling, or a shared screen in _wireframes via
   --shared, shown with a doubled ring). An edge case forks DOWN from the
   segment where the branch happens (.flow-branch — off the happy path);
   when a flow has a branch, add .flow--branch to reserve the room it
   hangs into. Conventions: docs/architecture/README.md §Features.
   Loaded by _features/<feature>/index.html on top of module.css
   (parallel to wireframe.css's wf-* kit for screen mockups).
   Placement convention: docs/architecture/README.md §Styling. */

.flow {
  display: flex;
  align-items: center;
  background: var(--paper);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  /* Generous padding frames the line and keeps the floating station
     names/roles (absolutely positioned, they overflow the line band)
     inside the border. */
  padding: 2.8rem 4rem 2.4rem;
  margin: 0.5rem 0 0;
}

/* Reserve vertical room INSIDE the frame for a downward .flow-branch
   (absolutely positioned) so it hangs within the border, not past it. */
.flow--branch {
  padding-bottom: 6rem;
}

/* A station — the dot rides the line; name (above) & role (below) float
   around it so the dots stay co-linear. The name is the screen link. */
.flow-stop {
  position: relative;
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--surface);
  border: 4px solid var(--accent);
  z-index: 1;
}

/* Station on a SHARED screen (lives in _wireframes) — doubled ring, the
   "lives elsewhere" cue echoing the dashed shared step it replaces. */
.flow-stop--shared {
  border-style: double;
  border-width: 5px;
}

.flow-stop__name {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  white-space: nowrap;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}

a.flow-stop__name:hover {
  color: var(--accent);
}

.flow-stop__role {
  position: absolute;
  top: 24px;
  left: 50%;
  transform: translateX(-50%);
  white-space: nowrap;
  font-size: 0.62rem;
  color: var(--text-muted);
}

/* The line between two stations + the trigger/condition that drives it */
.flow-seg {
  position: relative;
  flex: 1 1 auto;
  height: 4px;
  background: var(--accent);
}

.flow-seg__label {
  position: absolute;
  top: -1.4rem;
  left: 50%;
  transform: translateX(-50%);
  white-space: nowrap;
  font-size: 0.56rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--accent);
}

/* Direction cue — the transition flows along the line, left → right */
.flow-seg__label::before {
  content: "→";
  margin-right: 0.3em;
}

/* Edge-case fork — an L-elbow off the happy path: drops DOWN from the
   segment's centre, turns RIGHT, ends at the screen. Solid, grey, and
   thinner (2px) than the metro line (4px) so it reads as secondary. The
   .flow-branch box is the fork point; everything below hangs off it. */
.flow-branch {
  position: absolute;
  top: 2px; /* centre of the 4px line */
  left: 50%;
}

.flow-branch__label {
  position: absolute;
  top: 4px;
  left: 10px; /* in the crook of the elbow, right of the vertical drop */
  max-width: 7rem;
  white-space: normal;
  font-size: 0.56rem;
  font-weight: 700;
  line-height: 1.25;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--accent);
}

/* The L-elbow: left + bottom borders draw the down-then-right path */
.flow-branch__elbow {
  position: absolute;
  top: 0;
  left: -1px; /* centre the 2px stroke on the fork x */
  width: 70px; /* horizontal run */
  height: 46px; /* vertical drop */
  border-left: 2px solid var(--text-muted);
  border-bottom: 2px solid var(--text-muted);
}

/* Station at the elbow's far end (bottom-right corner) */
.flow-branch__stop {
  position: absolute;
  top: 46px;
  left: 70px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--text-muted);
  transform: translate(-50%, -50%);
}

.flow-branch__name {
  position: absolute;
  top: 58px;
  left: 70px;
  transform: translateX(-50%);
  white-space: nowrap;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}

a.flow-branch__name:hover {
  color: var(--accent);
}

.flow-branch__role {
  position: absolute;
  top: 76px;
  left: 70px;
  transform: translateX(-50%);
  white-space: nowrap;
  font-size: 0.6rem;
  color: var(--text-muted);
}