openfreebooks-bookgenerator/content/math/written-calculation/chapter.scss

// Break out of prose max-width (68ch) to the same width as .container
.book-prose .math-widget-mount:has(.va-workbench) {
  max-width: none;
}

.va-workbench {
  --va-text: var(--ink);
  --va-operator: var(--muted);
  --va-carry: #dc2626;
  --va-borrow: var(--accent);
  --va-result: var(--success);
  --va-line: var(--line);
  --va-highlight: color-mix(in srgb, var(--accent) 14%, transparent);
  --va-highlight-border: color-mix(in srgb, var(--accent) 38%, transparent);
  --va-error: #dc2626;
  --va-canvas-dot: color-mix(in srgb, var(--line) 90%, transparent);
  --va-panel-bg: var(--card-bg);
  --va-panel-border: var(--card-border);
  --va-stage-bg: var(--paper);

  width: min(1100px, 92vw);
  max-width: none;
  margin-top: 1.25rem;
}

[data-theme="dark"] .va-workbench,
:root:not([data-theme="light"]) .va-workbench {
  --va-carry: #f87171;
  --va-error: #f87171;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .va-workbench {
    --va-carry: #f87171;
    --va-error: #f87171;
  }
}

.va-workbench__shell {
  display: flex;
  flex-direction: column;
  min-height: 24rem;
  border: 1px solid var(--va-panel-border);
  border-radius: 14px;
  overflow: hidden;
  background: var(--va-panel-bg);
  box-shadow: 0 10px 32px var(--shadow-soft);
}

@media (min-width: 768px) {
  .va-workbench__shell {
    flex-direction: row;
    min-height: 32rem;
  }
}

.va-workbench__mobile-toggle {
  display: none;
  width: 100%;
  font: inherit;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 0.75rem 1rem;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--paper) 50%, var(--card-bg));
  color: var(--ink);
  cursor: pointer;
}

.va-workbench__sidebar {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--line);
  background: var(--va-panel-bg);
  overflow-y: auto;
}

@media (min-width: 768px) {
  .va-workbench__sidebar {
    width: 18rem;
    border-bottom: none;
    border-right: 1px solid var(--line);
  }
}

.va-workbench__brand {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 0.25rem;
}

.va-workbench__brand-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0.75rem;
  background: var(--accent);
  color: var(--paper);
  font-size: 1.25rem;
  font-weight: 700;
  box-shadow: 0 4px 12px var(--shadow-soft);
}

.va-workbench__brand-text {
  font-size: 1rem;
  line-height: 1.3;
  color: var(--ink);
}

.va-workbench__brand-text strong {
  color: var(--accent);
  font-weight: 600;
}

.va-workbench__sound-btn {
  margin-left: auto;
  font: inherit;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.35rem 0.55rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: color-mix(in srgb, var(--paper) 55%, var(--card-bg));
  color: var(--soft-ink);
  cursor: pointer;
}

.va-workbench__sound-btn:hover {
  border-color: var(--accent);
  color: var(--ink);
}

.va-workbench__field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.va-workbench__label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--soft-ink);
}

.va-workbench__op-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
}

.va-workbench__op-btn {
  font: inherit;
  font-size: 1.25rem;
  font-weight: 700;
  padding: 0.5rem;
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  background: color-mix(in srgb, var(--paper) 60%, var(--card-bg));
  color: var(--soft-ink);
  cursor: pointer;
  transition:
    background 0.12s ease,
    border-color 0.12s ease,
    color 0.12s ease;
}

.va-workbench__op-btn:hover {
  border-color: var(--accent);
  color: var(--ink);
}

.va-workbench__op-btn--active {
  border-color: color-mix(in srgb, var(--accent) 45%, var(--line));
  background: color-mix(in srgb, var(--accent) 12%, var(--card-bg));
  color: var(--accent);
}

.va-workbench__textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--mono);
  font-size: 1.0625rem;
  line-height: 1.4;
  color: var(--ink);
  background: color-mix(in srgb, var(--paper) 50%, var(--card-bg));
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  resize: vertical;
  min-height: 5rem;
}

.va-workbench__textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.va-workbench__hint,
.va-workbench__footer-note {
  font-size: 0.75rem;
  line-height: 1.45;
  color: var(--muted);
  margin: 0;
}

.va-workbench__generate {
  font: inherit;
  font-weight: 600;
  width: 100%;
  padding: 0.75rem 1rem;
  border: none;
  border-radius: 0.5rem;
  background: var(--accent);
  color: var(--paper);
  cursor: pointer;
  box-shadow: 0 4px 14px var(--shadow-soft);
  transition:
    filter 0.12s ease,
    transform 0.08s ease;
}

.va-workbench__generate:hover {
  filter: brightness(1.06);
}

.va-workbench__generate:active {
  transform: scale(0.98);
}

.va-workbench__anim {
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.va-workbench__transport {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.35rem;
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  background: color-mix(in srgb, var(--paper) 40%, var(--card-bg));
}

.va-workbench__transport-btn {
  font: inherit;
  font-size: 1.5rem;
  line-height: 1;
  padding: 0.35rem 0.65rem;
  border: none;
  border-radius: 0.35rem;
  background: transparent;
  color: var(--soft-ink);
  cursor: pointer;
}

.va-workbench__transport-btn:hover {
  color: var(--accent);
  background: var(--card-bg);
}

.va-workbench__play {
  font: inherit;
  font-weight: 600;
  flex: 1;
  padding: 0.45rem 1rem;
  border: none;
  border-radius: 0.35rem;
  background: var(--accent);
  color: var(--paper);
  cursor: pointer;
}

.va-workbench__play:hover {
  filter: brightness(1.06);
}

.va-workbench__speed {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  color: var(--muted);
}

.va-workbench__speed-slider {
  flex: 1;
  accent-color: var(--accent);
}

.va-workbench__footer-note {
  margin-top: auto;
  text-align: center;
}

.va-workbench__stage {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 18rem;
  background: var(--va-stage-bg);
  position: relative;
}

.va-workbench__message-box {
  position: relative;
  z-index: 1;
  width: 100%;
  padding: 0.75rem 0.9rem;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--paper) 80%, var(--card-bg));
}

.va-workbench__message-box--error .va-workbench__message {
  color: var(--va-error);
}

.va-workbench__message-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
}

.va-workbench__message {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ink);
  margin: 0;
  line-height: 1.4;
  text-align: left;
}

.va-workbench__progress-track {
  width: 100%;
  height: 0.35rem;
  border-radius: 999px;
  background: var(--line);
  overflow: hidden;
}

.va-workbench__progress-fill {
  height: 100%;
  background: var(--accent);
  transition: width 0.25s ease;
}

.va-workbench__step-counter {
  font-size: 0.72rem;
  color: var(--muted);
  margin: 0;
  white-space: nowrap;
}

.va-workbench__canvas-wrap {
  flex: 1;
  position: relative;
  min-height: 14rem;
  background-color: var(--va-stage-bg);
  background-image: radial-gradient(var(--va-canvas-dot) 1px, transparent 1px);
  background-size: 20px 20px;
}

@media (max-width: 767px) {
  .va-workbench {
    width: 100%;
    margin-top: 1rem;
  }

  .va-workbench__mobile-toggle {
    display: block;
  }

  .va-workbench__sidebar {
    gap: 0;
    max-height: 0;
    padding: 0 1rem;
    border-bottom: 0;
    overflow: hidden;
    transition: max-height 0.24s ease;
  }

  .va-workbench__sidebar--open {
    gap: 0.85rem;
    max-height: 42rem;
    padding: 1rem;
    border-bottom: 1px solid var(--line);
    overflow-y: auto;
  }

  .va-workbench__stage {
    min-height: 14rem;
  }

  .va-workbench__message-head {
    flex-wrap: wrap;
    row-gap: 0.2rem;
  }

  .va-workbench__message {
    font-size: 0.88rem;
  }

  .va-workbench__canvas-wrap {
    min-height: 12rem;
  }
}

.va-workbench__canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

.va-static {
  font-family: var(--mono);
  font-size: 1.25rem;
  line-height: 1.35;
  letter-spacing: 0.08em;
  margin: 1rem 0;
  padding: 1rem 1.25rem;
  color: var(--ink);
  background: color-mix(in srgb, var(--paper) 50%, var(--card-bg));
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  overflow-x: auto;
}

.va-static__carry,
.va-static__borrow {
  font-size: 0.85em;
  vertical-align: super;
}

.book-prose .written-terms-table td:first-child {
  font-weight: 600;
  white-space: nowrap;
}