/* Post-specific styles: prefix-tree-packing */

.byline {
  font-family: var(--sans);
  color: var(--text-muted);
  font-size: 0.85rem;
  margin: -0.5rem 0 2.5rem;
}

.aside {
  font-size: 0.98rem;
  color: var(--text-secondary);
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: 8px;
  padding: 1rem 1.2rem;
  margin: 1.75rem 0;
}

.aside p:last-child { margin-bottom: 0; }

.result-inline {
  font-family: var(--mono);
  font-size: 0.92em;
  background: var(--surface-code);
  padding: 0.1em 0.4em;
  border-radius: 4px;
}

/* --- segment color slots (identity, fixed order) --- */
.seg-1 { background: var(--series-1); }
.seg-2 { background: var(--series-2); }
.seg-3 { background: var(--series-3); }
.seg-4 { background: var(--series-4); }
.seg-5 { background: var(--series-5); }
.seg-6 { background: var(--series-6); }
.seg-7 { background: var(--series-7); }
.seg-8 { background: var(--series-8); }

/* --- generic bar-track components, shared by static figures + the diagram --- */
.bin-track {
  position: relative;
  flex: 1;
  height: 1.7rem;
  background: var(--surface-code);
  border: 1px solid var(--hairline);
  border-radius: 4px;
  overflow: hidden;
  display: flex;
}

.bin-seg {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: 0.65rem;
  color: #fff;
  text-shadow: 0 1px 1px rgba(0, 0, 0, 0.35);
  white-space: nowrap;
  overflow: hidden;
  transition: width 0.35s ease;
  flex-shrink: 0;
}

.bin-seg.dim { opacity: 0.3; }

.bin-fill-empty {
  height: 100%;
  flex-shrink: 0;
  background: repeating-linear-gradient(
    45deg, transparent, transparent 4px,
    var(--hairline) 4px, var(--hairline) 5px
  );
}

/* --- static figure: tree anatomy --- */
.tree-figure {
  display: flex;
  flex-direction: column;
  gap: 1.6rem;
  padding: 1.5rem 1.5rem 0.75rem;
}

.tree-figure .seq-group { display: flex; flex-direction: column; gap: 0.5rem; }

/* widths are set inline per-row, proportional to a shared token scale, so the
   same segment (e.g. R) lines up at the same pixel width across rows */
.tree-figure .bin-track { flex: 0 0 auto; }

.seq-row { display: flex; align-items: center; gap: 0.6rem; }

.seq-row-label {
  width: 3.2rem;
  flex-shrink: 0;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-muted);
}

.tree-arrow {
  align-self: center;
  font-family: var(--sans);
  font-size: 0.78rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.tree-diagram {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
}

.tree-node-row {
  display: flex;
  justify-content: center;
}

.tree-node {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.7rem;
  border-radius: 6px;
  color: #fff;
  font-family: var(--mono);
  font-size: 0.72rem;
  white-space: nowrap;
}

/* a lone vertical drop, e.g. from a node down to its own children row */
.tree-connector {
  width: 0;
  height: 1.1rem;
  border-left: 1.5px solid var(--hairline);
}

.tree-children {
  display: flex;
  justify-content: center;
  gap: 0;
}

/* Each child draws its own edge: a vertical drop centered on itself, plus a
   horizontal half-segment reaching toward its neighbor. Adjacent children's
   half-segments meet exactly at the midpoint of the gutter between them, so
   the combined line is correct regardless of how wide either child's own
   subtree is — no fixed/guessed widths needed. */
.tree-child-branch {
  position: relative;
  padding-top: 1.1rem;
  margin: 0 0.9rem;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.tree-child-branch::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  height: 1.1rem;
  border-left: 1.5px solid var(--hairline);
}

.tree-child-branch::after {
  content: "";
  position: absolute;
  top: 0;
  left: -0.9rem;
  right: -0.9rem;
  border-top: 1.5px solid var(--hairline);
}

.tree-child-branch:first-child::after { left: 50%; }
.tree-child-branch:last-child::after { right: 50%; }
.tree-child-branch:only-child::after { display: none; }

.tree-child-branch .tree-connector { height: 0.9rem; }

/* --- static figure: ancestor-visibility grid --- */
.attn-figure { padding: 1.5rem; }

.attn-grid-wrap { display: flex; gap: 1.5rem; align-items: flex-start; flex-wrap: wrap; }

.attn-grid {
  display: grid;
  grid-template-columns: repeat(9, 1.7rem);
  grid-auto-rows: 1.7rem;
  gap: 2px;
}

.attn-cell {
  border-radius: 2px;
}

.attn-cell.masked { background: transparent; border: 1px dashed var(--hairline); }
.attn-cell.query-row { outline: 2px solid var(--text-primary); outline-offset: -2px; }

.attn-axis-label {
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
}

.attn-legend {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-family: var(--sans);
  font-size: 0.82rem;
  color: var(--text-secondary);
  min-width: 14rem;
}

.attn-legend-item { display: flex; align-items: center; gap: 0.5rem; }

.attn-swatch {
  width: 0.9rem;
  height: 0.9rem;
  border-radius: 2px;
  flex-shrink: 0;
}

/* --- static figure: metadata-space flow --- */
.flow-figure {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  padding: 1.5rem;
  flex-wrap: wrap;
}

.flow-box {
  flex: 1;
  min-width: 13rem;
  border: 1px solid var(--hairline);
  border-radius: 8px;
  padding: 1rem 1.1rem;
  background: var(--surface-code);
}

.flow-box h4 {
  margin: 0 0 0.4rem;
  font-family: var(--sans);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.flow-box p { margin: 0; font-size: 0.92rem; color: var(--text-secondary); }

.flow-arrow {
  font-family: var(--sans);
  font-size: 1.4rem;
  color: var(--text-muted);
  flex-shrink: 0;
}

/* --- interactive bin-packing walkthrough --- */
.bin-demo { padding: 1.5rem 1.5rem 1.75rem; }

.bin-demo-controls {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1.1rem;
  font-family: var(--sans);
}

.bin-demo-controls button {
  font-family: var(--sans);
  font-size: 0.8rem;
  padding: 0.35rem 0.8rem;
  border: 1px solid var(--hairline);
  background: var(--surface-page);
  color: var(--text-primary);
  border-radius: 6px;
  cursor: pointer;
}

.bin-demo-controls button:hover:not(:disabled) { border-color: var(--accent); }
.bin-demo-controls button:disabled { opacity: 0.35; cursor: default; }

.bin-demo-step-label {
  font-family: var(--sans);
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-left: auto;
}

.bin-demo h5 {
  font-family: var(--sans);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin: 0 0 0.5rem;
}

.bin-demo-queue, .bin-demo-bins {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  margin-bottom: 1.3rem;
}

.bin-row { display: flex; align-items: center; gap: 0.6rem; }

.bin-row.placed { opacity: 0.45; }

.bin-row-label {
  width: 2.6rem;
  flex-shrink: 0;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-secondary);
}

.bin-row-cost {
  width: 4.5rem;
  flex-shrink: 0;
  text-align: right;
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--text-muted);
}

.bin-demo-empty {
  font-family: var(--sans);
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 0;
}

.bin-demo-readout {
  font-family: var(--sans);
  font-size: 0.92rem;
  line-height: 1.55;
  color: var(--text-secondary);
  background: var(--surface-code);
  border-radius: 8px;
  padding: 0.9rem 1.1rem;
  min-height: 3.5em;
}

.bin-demo-readout .fit { color: var(--status-good); font-weight: 600; }
.bin-demo-readout .nofit { color: var(--status-critical); font-weight: 600; }

.bin-demo-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1rem;
  margin-top: 1rem;
  font-family: var(--sans);
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.legend-item { display: flex; align-items: center; gap: 0.35rem; }

.legend-swatch {
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 2px;
  flex-shrink: 0;
}

/* --- benchmark bars + table --- */
.bench-figure { padding: 1.5rem; }

.bench-bars { display: flex; flex-direction: column; gap: 0.7rem; margin-bottom: 1rem; }

.bench-bar-row { display: flex; align-items: center; gap: 0.8rem; }

.bench-bar-label {
  width: 11rem;
  flex-shrink: 0;
  font-family: var(--sans);
  font-size: 0.82rem;
  color: var(--text-secondary);
  text-align: right;
}

.bench-bar-track {
  flex: 1;
  background: var(--surface-code);
  border-radius: 4px;
  overflow: hidden;
  height: 1.5rem;
}

.bench-bar-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 4px 0 0 4px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-right: 0.5rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: #fff;
  white-space: nowrap;
}

table.data-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--sans);
  font-size: 0.85rem;
  margin: 1rem 0;
}

table.data-table th, table.data-table td {
  text-align: right;
  padding: 0.45rem 0.7rem;
  border-bottom: 1px solid var(--hairline);
  font-variant-numeric: tabular-nums;
}

table.data-table th:first-child, table.data-table td:first-child { text-align: left; }

table.data-table thead th {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.note {
  font-family: var(--sans);
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.75rem;
}