/* =================================================== */
/* Working Tree View                                    */
/* =================================================== */
:root {
  --wt-line: #cbd5e1;
  --wt-line-done: #86efac;
  --wt-line-current: #3b82f6;
  --wt-trunk-x: 26px;
  --wt-leaf-w: 230px;
}

.wt-stats {
  display: flex;
  gap: 0.75rem;
}
.wt-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 84px;
  padding: 0.5rem 0.75rem;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 10px;
}
.wt-stat b {
  font-size: 1.25rem;
  color: #0f172a;
}
.wt-stat span {
  font-size: 0.72rem;
  color: #64748b;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.wt-position-callout {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  padding: 0.85rem 1rem;
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  border-radius: 10px;
}
.wt-position-pin {
  font-size: 1.3rem;
  line-height: 1;
}
.wt-position-title {
  font-weight: 700;
  color: #1e3a8a;
  font-size: 0.95rem;
}
.wt-position-detail {
  color: #334155;
  font-size: 0.83rem;
  margin-top: 0.2rem;
}

.wt-agent-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.wt-agent-chip {
  font-size: 0.78rem;
  padding: 0.2rem 0.6rem;
  border-radius: 9999px;
  background: #f1f5f9;
  border: 1px solid #e2e8f0;
  color: #334155;
}
.wt-agent-chip b {
  margin-left: 0.25rem;
  color: #0f172a;
}

/* ---- Diagram ---- */
.wt-diagram-card,
.wt-activity-card {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}
.wt-diagram-card {
  overflow-x: auto;
}
/* Top-to-bottom flow: Project -> Phase 1 -> Phase 2 -> ... down one trunk on the left;
   each phase's documents branch off the trunk to the right */
.wt-flow {
  display: flex;
  flex-direction: column;
  align-items: stretch;
}
.wt-stage-root {
  align-self: flex-start;
}

.wt-root-node {
  position: relative;
  white-space: nowrap;
  padding: 0.6rem 1.2rem;
  border-radius: 9999px;
  font-weight: 800;
  font-size: 0.95rem;
  background: #f1f5f9;
  border: 2px solid #cbd5e1;
  color: #0f172a;
}
.wt-root-node.greenfield {
  background: #dcfce7;
  border-color: #86efac;
  color: #166534;
}
.wt-root-node.brownfield {
  background: #fef3c7;
  border-color: #d97706;
  color: #78350f;
}
/* Down-arrow on the trunk between two steps */
.wt-arrow {
  --wt-arrow-color: var(--wt-line);
  position: relative;
  height: 38px;
}
.wt-arrow::before {
  content: '';
  position: absolute;
  left: var(--wt-trunk-x);
  top: 0;
  bottom: 6px;
  border-left: 2px solid var(--wt-arrow-color);
}
.wt-arrow::after {
  content: '';
  position: absolute;
  left: calc(var(--wt-trunk-x) - 4px);
  bottom: 4px;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--wt-arrow-color);
  border-bottom: 2px solid var(--wt-arrow-color);
  transform: rotate(45deg);
}
.wt-arrow.done {
  --wt-arrow-color: var(--wt-line-done);
}
.wt-arrow.current {
  --wt-arrow-color: var(--wt-line-current);
}
.wt-flow-divider {
  margin: 1.5rem 0 1.25rem;
  border-top: 2px dashed #e2e8f0;
}
.wt-flow-or {
  padding: 0.6rem 0 0.6rem calc(var(--wt-trunk-x) - 6px);
  font-size: 0.78rem;
  font-weight: 700;
  color: #94a3b8;
}

.wt-branch {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.wt-phase-node {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  min-width: 280px;
  padding: 0.6rem 0.75rem;
  border-radius: 10px;
  background: #ffffff;
  border: 2px solid #e2e8f0;
}
.wt-branch.done .wt-phase-node {
  border-color: var(--wt-line-done);
  background: #f0fdf4;
}
.wt-branch.current .wt-phase-node {
  border-color: var(--wt-line-current);
  background: #eff6ff;
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.12);
}
.wt-branch.future .wt-phase-node {
  border-style: dashed;
  opacity: 0.75;
}
.wt-phase-icon {
  font-size: 1.15rem;
}
.wt-phase-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.wt-phase-title {
  font-weight: 700;
  font-size: 0.83rem;
  color: #0f172a;
}
.wt-phase-meta {
  font-size: 0.72rem;
  color: #64748b;
}
.wt-tier-tag {
  font-size: 0.65rem;
  font-weight: 700;
  padding: 0 0.35rem;
  border-radius: 4px;
  background: #fef3c7;
  color: #78350f;
}

/* Documents branch off the trunk to the right, wrapping into rows */
.wt-leaves {
  position: relative;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(var(--wt-leaf-w), 1fr));
  gap: 0.6rem;
  align-self: stretch;
  margin-left: var(--wt-trunk-x);
  padding: 0.75rem 0 0 22px;
  border-left: 2px solid var(--wt-line);
}
/* Branch stub from the trunk into the first row */
.wt-leaves::before {
  content: '';
  position: absolute;
  left: 0;
  top: 1.85rem;
  width: 18px;
  border-top: 2px solid var(--wt-line);
}
.wt-leaf {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  width: 100%;
  text-align: left;
  font: inherit;
  padding: 0.6rem 0.7rem;
  border-radius: 8px;
  border: 1px solid #e2e8f0;
  border-left: 4px solid #eab308;
  background: #ffffff;
  cursor: pointer;
  transition:
    transform 0.12s ease,
    box-shadow 0.12s ease;
}
button.wt-leaf:hover {
  transform: translateY(-1px);
  box-shadow: 0 3px 8px rgba(15, 23, 42, 0.08);
}
.wt-leaf.approved {
  border-left-color: #22c55e;
}
.wt-leaf.rejected {
  border-left-color: #ef4444;
}
.wt-leaf.placeholder {
  cursor: default;
  border-style: dashed;
  border-left-width: 1px;
  background: #f8fafc;
  opacity: 0.85;
}
.wt-leaf.current {
  border-color: var(--wt-line-current);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.18);
  opacity: 1;
  animation: wt-pulse 2.2s ease-in-out infinite;
}
@keyframes wt-pulse {
  0%,
  100% {
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.18);
  }
  50% {
    box-shadow: 0 0 0 6px rgba(59, 130, 246, 0.08);
  }
}
@media (prefers-reduced-motion: reduce) {
  .wt-leaf.current {
    animation: none;
  }
}
.wt-here-flag {
  align-self: flex-start;
  font-size: 0.68rem;
  font-weight: 700;
  color: #1d4ed8;
  background: #dbeafe;
  padding: 0.05rem 0.45rem;
  border-radius: 9999px;
}
.wt-leaf-file {
  font-weight: 700;
  font-size: 0.82rem;
  color: #0f172a;
  word-break: break-all;
}
.wt-leaf-agent {
  font-size: 0.76rem;
  color: #334155;
}
.wt-leaf-skill {
  font-size: 0.72rem;
  color: #64748b;
}
.wt-leaf-skill code,
.wt-activity-card code,
.wt-position-detail code {
  font-family: 'Fira Code', monospace;
  font-size: 0.7rem;
  background: #f1f5f9;
  padding: 0 0.3rem;
  border-radius: 4px;
}
.wt-inferred {
  font-size: 0.64rem;
  font-style: italic;
  color: #94a3b8;
}
.wt-leaf-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.4rem;
  flex-wrap: wrap;
  margin-top: 0.15rem;
}
.wt-leaf-time {
  font-size: 0.68rem;
  color: #94a3b8;
}
.wt-empty-leaf {
  font-size: 0.75rem;
  color: #94a3b8;
  font-style: italic;
  padding: 0.4rem 0;
}

/* ---- Activity timeline ---- */
.wt-activity-card h3 {
  font-size: 1rem;
  font-weight: 800;
  color: #0f172a;
  margin-bottom: 1rem;
}
.wt-activity-empty {
  font-size: 0.85rem;
  color: #64748b;
  line-height: 1.6;
}
.wt-timeline {
  list-style: none;
  position: relative;
  max-height: 420px;
  overflow-y: auto;
  padding-left: 0.25rem;
}
.wt-event {
  position: relative;
  display: flex;
  gap: 0.75rem;
  padding-bottom: 0.9rem;
}
.wt-event::before {
  content: '';
  position: absolute;
  left: 5px;
  top: 14px;
  bottom: 0;
  border-left: 2px solid #e2e8f0;
}
.wt-event:last-child::before {
  display: none;
}
.wt-event-dot {
  flex: none;
  width: 12px;
  height: 12px;
  margin-top: 3px;
  border-radius: 50%;
  background: #94a3b8;
}
.wt-event.ev-created .wt-event-dot {
  background: #3b82f6;
}
.wt-event.ev-updated .wt-event-dot {
  background: #8b5cf6;
}
.wt-event.ev-status .wt-event-dot {
  background: #22c55e;
}
.wt-event.ev-classified .wt-event-dot {
  background: #d97706;
}
.wt-event-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem;
  font-size: 0.82rem;
}
.wt-event-type {
  font-weight: 700;
  text-transform: capitalize;
  color: #0f172a;
}
.wt-event-agent {
  color: #334155;
}
.wt-event-skill {
  font-family: 'Fira Code', monospace;
  font-size: 0.72rem;
  color: #64748b;
}
.wt-event-time {
  margin-left: auto;
  font-size: 0.72rem;
  color: #94a3b8;
}
.wt-event-detail {
  font-size: 0.78rem;
  color: #64748b;
  margin-top: 0.15rem;
  word-break: break-word;
}

/* ---- Narrow screens: tighter trunk, documents drop to one column ---- */
@media (max-width: 900px) {
  :root {
    --wt-trunk-x: 18px;
    --wt-leaf-w: 190px;
  }
  .wt-phase-node {
    min-width: 0;
  }
  .wt-diagram-card {
    padding: 1rem;
  }
  .wt-stats {
    width: 100%;
    flex-wrap: wrap;
  }
  .wt-stat {
    flex: 1;
    min-width: 0;
  }
}