/* Sparse table / sqrt decomposition page */

.sparse-stage {
  padding: 24px 28px 32px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

/* The element row visually grouped into blocks */
.block-strip {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  flex-wrap: wrap;
}
.block-strip .block {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  border: 1.5px dashed var(--line-strong);
  border-radius: 10px;
  padding: 8px;
  background: var(--surface);
  position: relative;
  transition: background 0.18s, border-color 0.18s;
}
.block-strip .block.full-middle {
  background: var(--good-soft);
  border-color: var(--good);
  border-style: solid;
}
.block-strip .block.partial-left,
.block-strip .block.partial-right {
  background: var(--cool-soft);
  border-color: var(--cool);
}
.block-strip .block.current-update {
  background: var(--accent-soft);
  border-color: var(--accent);
  border-style: solid;
}
.block-strip .block .label {
  font-family: 'system-ui', monospace;
  font-size: 10.5px;
  color: var(--muted);
  margin-bottom: 4px;
  text-align: center;
}
.block-strip .summary {
  font-family: 'system-ui', monospace;
  font-size: 14px;
  font-weight: 600;
  background: var(--surface-2);
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  padding: 4px 8px;
  text-align: center;
  margin-bottom: 6px;
  transition: background 0.18s, border-color 0.18s;
}
.block-strip .block.current-update .summary,
.block-strip .block.full-middle .summary {
  background: var(--surface);
}

.block-strip .cells {
  display: flex;
  gap: 4px;
}
.block-strip .cells .cell {
  width: 44px;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.block-strip .cells .cell .idx {
  font-family: 'system-ui', monospace;
  font-size: 10px;
  color: var(--muted);
  margin-bottom: 2px;
}
.block-strip .cells .cell .box {
  width: 100%;
  height: 36px;
  border: 1.5px solid var(--line-strong);
  border-radius: 6px;
  background: var(--surface);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'system-ui', monospace;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  transition: background 0.18s, border-color 0.18s, transform 0.18s;
}
.block-strip .cells .cell.visited .box {
  background: var(--cool);
  border-color: var(--cool);
  color: white;
}
.block-strip .cells .cell.target .box {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
  transform: translateY(-2px);
}
.block-strip .cells .cell.in-query-range .box {
  background: oklch(0.96 0.02 50);
  border-color: var(--accent);
}

/* Query bracket above the elements */
.query-brackets {
  font-family: 'system-ui', monospace;
  font-size: 11px;
  color: var(--accent-deep);
}