/* Digit Strip */
.digit-strip-section {
  padding: 1rem 2rem;
  background: var(--bg-color);
  width: 100%;
  position: sticky;
  top: 0;
  z-index: 90;
}

.digit-strip-layout {
  display: flex;
  gap: 1rem;
  align-items: stretch;
  width: 100%;
  background: var(--surface-color);
  border-radius: 12px;
  padding: 1rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  border: 1px solid var(--border-color);
}

.digit-strip-main {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.digit-strip-totals {
  width: 120px; /* permanent space */
  display: flex;
  flex-direction: column;
  align-items: center;
  flex-shrink: 0;
}

.digit-stats-equals {
  height: 2rem;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: bold;
  color: var(--text-secondary);
  visibility: hidden;
}

.digit-totals-cell {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  flex: 1;
  width: 100%;
}

.digit-stats-total-box {
  display: flex;
  align-items: center;
  justify-content: center;
  visibility: hidden;
  flex: 1;
}

/* Reserved space above the digit strip — always present to prevent layout shift */
.digit-stats-bar {
  position: relative;
  height: 2rem;
  width: 100%;
  margin-bottom: 0.5rem;
  transition: height 0.2s;
}

.digit-strip-container {
  display: flex;
  flex-wrap: nowrap; /* Force single row */
  width: 100%;
  overflow-x: auto; /* Allow horizontal scroll */
  overflow-y: hidden;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  scrollbar-width: thin;
}

.digit-strip-container::-webkit-scrollbar {
  height: 6px;
}

.digit-strip-container::-webkit-scrollbar-track {
  background: var(--hover-bg);
}

.digit-strip-container::-webkit-scrollbar-thumb {
  background-color: var(--border-color);
  border-radius: 10px;
}

.digit-cell {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  flex: 1 0 auto; /* Allow growing, don't shrink below content */
  min-width: 24px; /* Minimum width for readability */
  border-right: 1px solid var(--border-color);
  cursor: pointer;
  transition: transform 0.1s, background-color 0.2s;
  overflow: hidden;
}

.digit-cell:last-child {
  border-right: none;
}

.digit-val {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 600;
  padding: 0.4rem 0;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
}

.digit-idx {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-secondary);
  padding: 0.2rem 0;
  border-top: 1px dashed var(--border-color);
  text-align: center;
  background: var(--hover-bg);
}

/* Digit Stats Display — absolutely positioned over each selection group */
.digit-stats-display {
  position: absolute;
  top: 0;
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  height: 2rem;
  padding: 0 0.75rem;
  font-size: 0.85rem;
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--primary-accent);
  background: var(--surface-color);
  border: 1px solid var(--primary-accent);
  border-radius: 6px;
  white-space: nowrap;
  overflow: hidden;
  box-sizing: border-box;
  transition: opacity 0.2s;
  min-width: max-content;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

/* '=' total pill: aggregate across all selections, pinned to right via wrapper */
.digit-stats-display--total {
  position: static;
  width: auto;
  background: var(--success-color);
  border-color: var(--success-color);
  color: #fff;
}

.digit-stats-display--total .digit-stats-count,
.digit-stats-display--total .digit-stats-sum {
  color: #fff;
}

.digit-stats-display--total .digit-stats-count::before,
.digit-stats-display--total .digit-stats-sum::before {
  color: rgba(255,255,255,0.8);
}

/* Separator elements ('+' between pills) */
.digit-stats-separator {
  position: absolute;
  top: 0;
  height: 2rem;
  width: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: bold;
  color: var(--text-secondary);
  pointer-events: none;
  white-space: nowrap;
}

.digit-stats-count,
.digit-stats-sum {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  color: inherit;
}

.digit-stats-count::before {
  content: 'n:';
  font-weight: normal;
  opacity: 0.7;
}

.digit-stats-sum::before {
  content: 'Σ:';
  font-weight: normal;
  opacity: 0.7;
}

/* Number hotspot styling for digit stats */
.digit-stats-display .num-hotspot {
  cursor: pointer;
  transition: color 0.2s;
}

.digit-stats-display .num-hotspot:hover {
  color: var(--secondary-accent);
}

.digit-stats-display--total .num-hotspot {
  color: inherit;
}

.digit-stats-display--total .num-hotspot:hover {
  opacity: 0.8;
}