openfreebooks-bookgenerator/content/math/counting-and-numbers/chapter.scss

// counting-dots and shared dot rules: content/math/subject.scss

.counting-compare {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  justify-content: center;
  margin: 20px 0;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--card-bg);
}

.counting-compare__group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.counting-compare__digit {
  font-family: var(--mono);
  font-size: 1.25rem;
  font-weight: 700;
}

.counting-compare__word {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--soft-ink);
}

.counting-pattern-board {
  margin: 20px 0;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--card-bg);
}

.counting-pattern-ladder {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.counting-pattern-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  min-width: 56px;
  padding: 10px 8px;
  border-radius: 8px;
  background: rgba(20, 184, 166, 0.06);
}

.counting-pattern-step__digit {
  font-family: var(--mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--ink);
}

.counting-pattern-board__caption {
  margin: 14px 0 0;
  font-size: 0.9rem;
  color: var(--soft-ink);
  text-align: center;
}

.counting-shape-pattern {
  margin: 20px 0;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--card-bg);
}

.counting-shape-pattern__strip {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.counting-shape-pattern__strip > li {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.counting-shape {
  display: block;
  width: 36px;
  height: 36px;
}

.counting-shape--circle {
  border-radius: 50%;
  background: rgba(59, 130, 246, 0.45);
  border: 2px solid rgba(37, 99, 235, 0.5);
}

.counting-shape--square {
  border-radius: 4px;
  background: rgba(234, 179, 8, 0.45);
  border: 2px solid rgba(180, 83, 9, 0.45);
}

.counting-shape--question {
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  border: 2px dashed var(--line);
  font-family: var(--mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--muted);
  background: transparent;
}

.counting-shape-pattern__label {
  font-size: 0.72rem;
  color: var(--soft-ink);
  text-transform: lowercase;
}

.counting-shape-pattern__next .counting-shape-pattern__label {
  font-weight: 600;
  color: var(--accent);
}

.counting-demo__objects {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  min-height: 88px;
  padding: 16px;
  border: 1px dashed var(--line);
  border-radius: 10px;
  background: var(--card-bg);
}

.counting-demo__object {
  width: 40px;
  height: 40px;
  border: none;
  border-radius: 50%;
  background: rgba(20, 184, 166, 0.35);
  cursor: pointer;
  transition: transform 0.12s ease, background 0.12s ease;
}

.counting-demo__object:hover {
  transform: scale(1.06);
  background: rgba(20, 184, 166, 0.55);
}

.counting-demo__object--active {
  background: rgba(15, 118, 110, 0.75);
}

.counting-demo__count {
  font-family: var(--mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--ink);
}

.addition-groups__piles {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: center;
  gap: 20px;
}

.addition-groups__pile {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.addition-groups__dots {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
  width: 140px;
  min-height: 100px;
  padding: 10px;
  border-radius: 8px;
  background: rgba(59, 130, 246, 0.08);
}

.addition-groups__pile--b .addition-groups__dots {
  background: rgba(154, 107, 46, 0.12);
}

.addition-groups__dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--ink);
}

.addition-groups__plus,
.addition-groups__equals {
  font-family: var(--mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--soft-ink);
}

.addition-groups__total-dots {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  justify-content: center;
  max-width: 320px;
  min-height: 48px;
  margin-top: 12px;
}

.multiplication-array__grid {
  display: grid;
  gap: 6px;
  width: fit-content;
  margin: 0 auto;
  padding: 12px;
  border-radius: 10px;
  background: var(--card-bg);
  border: 1px solid var(--line);
}

.multiplication-array__cell {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(20, 184, 166, 0.45);
}

// Place value ladder (prose)
.counting-place-ladder {
  margin: 20px 0;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--card-bg);
}

.counting-place-ladder__steps {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 12px 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.counting-place-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.counting-place-step--arrow {
  font-family: var(--mono);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--soft-ink);
}

.counting-place-step__label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--soft-ink);
}

.counting-place-blocks__rod {
  display: block;
  width: 14px;
  height: 72px;
  border-radius: 4px;
  background: linear-gradient(180deg, #14b8a6 0%, #0f766e 100%);
}

.counting-place-blocks__grid {
  display: block;
  width: 72px;
  height: 72px;
  border-radius: 6px;
  background:
    repeating-linear-gradient(
      90deg,
      rgba(15, 118, 110, 0.35) 0,
      rgba(15, 118, 110, 0.35) 6px,
      transparent 6px,
      transparent 12px
    ),
    repeating-linear-gradient(
      rgba(15, 118, 110, 0.35) 0,
      rgba(15, 118, 110, 0.35) 6px,
      transparent 6px,
      transparent 12px
    );
  border: 2px solid rgba(15, 118, 110, 0.5);
}

.counting-big-table td:first-child {
  font-weight: 600;
}

// Division sharing widget
.division-sharing__equation {
  margin: 12px 0;
  font-family: var(--mono);
  font-size: 1.05rem;
  text-align: center;
}

.division-sharing__piles {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
}

.division-sharing__pile {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.division-sharing__pile-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--soft-ink);
}

.division-sharing__dots {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  justify-content: center;
  width: 88px;
  min-height: 72px;
  padding: 8px;
  border-radius: 8px;
  background: rgba(59, 130, 246, 0.08);
}

.division-sharing__dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--ink);
}

.division-sharing__dot--extra {
  background: #c2410c;
}

.division-sharing__dots--remainder {
  background: rgba(234, 88, 12, 0.1);
  border: 1px dashed rgba(180, 83, 9, 0.45);
}

.division-sharing__uneven {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: center;
  gap: 16px;
}

.division-sharing__remainder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

// Big numbers scale widget (canvas + audio)
.book-prose .math-widget-mount:has(.big-numbers-scale) {
  max-width: none;
}

.big-numbers-scale {
  --big-scale-canvas-bg: var(--paper);
  --big-scale-grid: color-mix(in srgb, var(--line) 70%, transparent);
  --big-scale-star: color-mix(in srgb, var(--soft-ink) 48%, transparent);

  width: min(1320px, 96vw);
  max-width: none;
}

[data-theme="dark"] .big-numbers-scale,
:root:not([data-theme="light"]) .big-numbers-scale {
  --big-scale-canvas-bg: color-mix(in srgb, var(--card-bg) 90%, black);
  --big-scale-grid: color-mix(in srgb, var(--line) 78%, rgba(148, 163, 184, 0.2));
  --big-scale-star: color-mix(in srgb, var(--soft-ink) 62%, rgba(255, 255, 255, 0.18));
}

.big-numbers-scale__layout {
  display: grid;
  gap: 14px;
}

.big-numbers-scale__canvas-panel,
.big-numbers-scale__controls,
.big-numbers-scale__section {
  min-width: 0;
}

.big-numbers-scale__canvas-panel {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--paper);
  overflow: hidden;
}

.big-numbers-scale__toolbar,
.big-numbers-scale__slider-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
}

.big-numbers-scale__slider-wrap {
  border-top: 1px solid var(--line);
  border-bottom: 0;
  flex-direction: column;
  align-items: stretch;
}

.big-numbers-scale__slider-meta {
  display: flex;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--soft-ink);
}

.big-numbers-scale__slider {
  width: 100%;
}

.big-numbers-scale__tool-btn,
.big-numbers-scale__autoplay-btn,
.speed-btn,
.preset-step-btn {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--card-bg);
  color: var(--ink);
  font-family: var(--mono);
  cursor: pointer;
}

.big-numbers-scale__tool-btn,
.big-numbers-scale__autoplay-btn {
  padding: 7px 10px;
  font-size: 0.76rem;
}

.big-numbers-scale__autoplay-btn {
  border-color: rgba(20, 184, 166, 0.45);
  background: rgba(20, 184, 166, 0.15);
  font-weight: 700;
}

.big-numbers-scale__autoplay-btn--pause {
  border-color: rgba(234, 88, 12, 0.45);
  background: rgba(234, 88, 12, 0.16);
}

.big-numbers-scale__badge {
  padding: 3px 7px;
  border-radius: 999px;
  border: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--soft-ink);
}

.big-numbers-scale__hud {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding: 10px 12px;
}

.big-numbers-scale__hud-card {
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: color-mix(in srgb, var(--card-bg) 84%, #0b1220);
}

.big-numbers-scale__hud-card--right {
  text-align: right;
}

.big-numbers-scale__hud-label {
  display: block;
  font-size: 0.7rem;
  color: var(--soft-ink);
}

.big-numbers-scale__hud-value {
  display: block;
  margin-top: 2px;
  font-family: var(--mono);
  font-size: 1.35rem;
  font-weight: 700;
}

.big-numbers-scale__hud-value--small {
  font-size: 1.05rem;
}

.big-numbers-scale__hud-sub {
  display: block;
  margin-top: 2px;
  font-size: 0.72rem;
  color: var(--soft-ink);
}

.big-numbers-scale__tier-badge {
  display: inline-block;
  margin-top: 4px;
  padding: 2px 6px;
  border-radius: 6px;
  font-size: 0.66rem;
  font-family: var(--mono);
  font-weight: 700;
  color: #08111f;
  background: #14b8a6;
}

.big-numbers-scale__tier-badge--green {
  background: #14b8a6;
}
.big-numbers-scale__tier-badge--purple {
  background: #8b5cf6;
}
.big-numbers-scale__tier-badge--orange {
  background: #f97316;
}
.big-numbers-scale__tier-badge--yellow {
  background: #f59e0b;
}
.big-numbers-scale__tier-badge--cyan {
  background: #06b6d4;
}

.big-numbers-scale__canvas-wrap {
  position: relative;
  height: 400px;
  background: var(--big-scale-canvas-bg);
}

.big-numbers-scale__canvas {
  width: 100%;
  height: 100%;
  display: block;
  cursor: grab;
}

.big-numbers-scale__canvas:active {
  cursor: grabbing;
}

.big-numbers-scale__status {
  position: absolute;
  left: 12px;
  bottom: 12px;
  padding: 6px 10px;
  border-radius: 8px;
  background: rgba(2, 6, 23, 0.85);
  border: 1px solid var(--line);
  color: var(--soft-ink);
  font-size: 0.74rem;
  opacity: 0;
  transform: translateY(5px);
  transition: opacity 160ms ease, transform 160ms ease;
}

.big-numbers-scale__status--visible {
  opacity: 1;
  transform: translateY(0);
}

.big-numbers-scale__controls {
  display: grid;
  gap: 10px;
}

.big-numbers-scale__section {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--card-bg);
  padding: 10px;
}

.big-numbers-scale__section-title {
  margin: 0 0 8px;
  font-size: 0.82rem;
  color: var(--soft-ink);
}

.big-numbers-scale__preset-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px;
}

.preset-step-btn {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
  padding: 7px;
  min-height: 58px;
}

.preset-step-btn__power {
  font-size: 0.65rem;
  color: var(--soft-ink);
  font-family: var(--mono);
}

.preset-step-btn__label {
  font-size: 0.78rem;
  font-weight: 700;
}

.preset-step-btn--active {
  border-color: rgba(20, 184, 166, 0.55);
  background: rgba(20, 184, 166, 0.15);
}

.big-numbers-scale__speed-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 6px;
}

.speed-btn {
  padding: 6px 8px;
  font-size: 0.75rem;
}

.speed-btn--active {
  border-color: rgba(20, 184, 166, 0.55);
  background: rgba(20, 184, 166, 0.18);
  font-weight: 700;
}

.big-numbers-scale__nav-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 6px;
  margin-top: 8px;
}

.big-numbers-scale__stat-text,
.big-numbers-scale__analogy {
  margin: 0;
  font-size: 0.78rem;
  color: var(--soft-ink);
}

.big-numbers-scale__stat-value {
  margin: 8px 0;
  padding: 8px;
  border-radius: 8px;
  border: 1px solid var(--line);
  font-family: var(--mono);
  font-weight: 700;
}

@media (min-width: 960px) {
  .big-numbers-scale__layout {
    grid-template-columns: minmax(0, 3fr) minmax(280px, 2fr);
  }
  .big-numbers-scale__hud {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}