openfreebooks-bookgenerator/content/math/linear-equations-two-unknowns/chapter.scss

.book-prose .math-widget-mount:has(.sim-graph),
.book-prose .math-widget-mount:has(.sim-solver) {
  max-width: none;
}

.sim-graph {
  --math-line2: #2563eb;

  .math-widget__equation-box.sim-graph__eq2-box {
    background: color-mix(in srgb, #2563eb 8%, transparent);
  }
}

[data-theme="dark"] .sim-graph {
  --math-line2: #60a5fa;
}

.sim-graph__presets {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.sim-graph__preset-btn {
  padding: 0.4rem 0.75rem;
  font-size: 0.8125rem;
  font-weight: 600;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  color: var(--soft-ink);
  cursor: pointer;
}

.sim-graph__preset-btn:hover {
  border-color: var(--accent);
  color: var(--ink);
}

.sim-graph__preset-btn--active {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 12%, var(--paper));
  color: var(--accent);
}

.sim-graph__line-heading {
  margin: 0.75rem 0 0.25rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--muted);
}

.sim-graph__status--unique .math-widget__delta-nature {
  color: var(--success);
}

.sim-graph__status--parallel .math-widget__delta-nature {
  color: var(--muted);
}

.sim-graph__status--coincident .math-widget__delta-nature {
  color: var(--accent);
}

.math-graph-tooltip--intersection .math-graph-tooltip__label {
  color: var(--math-root);
}

.math-graph-tooltip--line1 .math-graph-tooltip__label {
  color: var(--math-curve);
}

.math-graph-tooltip--line2 .math-graph-tooltip__label {
  color: var(--math-line2);
}

.sim-solver {
  --sim-panel-bg: var(--card-bg);
  --sim-panel-border: var(--card-border);
  --sim-error: #dc2626;

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

[data-theme="dark"] .sim-solver {
  --sim-error: #f87171;
}

.sim-solver__shell {
  display: flex;
  flex-direction: column;
  min-height: 24rem;
  border: 1px solid var(--sim-panel-border);
  border-radius: 14px;
  overflow: hidden;
  background: var(--sim-panel-bg);
}

@media (min-width: 768px) {
  .sim-solver__shell {
    flex-direction: row;
    min-height: 28rem;
  }
}

.sim-solver__sidebar {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--line);
}

@media (min-width: 768px) {
  .sim-solver__sidebar {
    width: 17rem;
    border-bottom: none;
    border-right: 1px solid var(--line);
  }
}

.sim-solver__field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

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

.sim-solver__select {
  width: 100%;
  padding: 0.5rem 0.65rem;
  font-size: 0.875rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  color: var(--ink);
}

.sim-solver__method-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
}

.sim-solver__method-btn {
  padding: 0.5rem 0.65rem;
  font-size: 0.8125rem;
  font-weight: 600;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  color: var(--soft-ink);
  cursor: pointer;
}

.sim-solver__method-btn--active {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 12%, var(--paper));
  color: var(--accent);
}

.sim-solver__method-btn--disabled,
.sim-solver__method-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.sim-solver__transport {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.sim-solver__transport-btn,
.sim-solver__play {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 2.5rem;
  height: 2.5rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  color: var(--ink);
  font-size: 1.25rem;
  cursor: pointer;
}

.sim-solver__play {
  flex: 1;
  font-size: 0.875rem;
  font-weight: 600;
}

.sim-solver__transport-btn:disabled,
.sim-solver__play:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

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

.sim-solver__speed-slider {
  flex: 1;
}

.sim-solver__stage {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  min-width: 0;
}

.sim-solver__message-box {
  padding: 0.75rem 1rem;
  border-radius: 10px;
  background: color-mix(in srgb, var(--accent) 6%, var(--paper));
}

.sim-solver__message-box--error {
  background: color-mix(in srgb, var(--sim-error) 10%, var(--paper));
}

.sim-solver__message-box--error .sim-solver__message {
  color: var(--sim-error);
}

.sim-solver__message {
  margin: 0 0 0.5rem;
  font-size: 0.9rem;
}

.sim-solver__progress-track {
  height: 4px;
  border-radius: 2px;
  background: var(--line);
  overflow: hidden;
}

.sim-solver__progress-fill {
  height: 100%;
  background: var(--accent);
  transition: width 0.2s ease;
}

.sim-solver__equation-panel {
  padding: 1rem;
  text-align: center;
  border-radius: 10px;
  background: color-mix(in srgb, var(--accent) 6%, transparent);
}

.sim-solver__panel-label {
  margin: 0 0 0.5rem;
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

.sim-solver__step-panel {
  flex: 1;
  padding: 1rem 1.25rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--paper);
}

.sim-solver__step-title {
  margin: 0 0 0.75rem;
  font-size: 1rem;
  color: var(--ink);
}

.sim-solver__step-math {
  font-size: 1.05rem;
  overflow-x: auto;
}

@media (min-width: 900px) {
  .math-widget__layout {
    grid-template-columns: minmax(260px, 340px) 1fr;
    align-items: start;
  }
}