/* Shared chrome for interactive lesson widgets — hairline border, no shadow,
   reuses the site's existing tokens (--md-default-fg-color--lightest for
   borders, 8px radius) plus the two accent colors already used across every
   lesson's inline SVG diagrams (#12A594 teal, #D05663 red/warning). */

.cf-widget {
  margin: 1.8rem auto;
  max-width: 600px;
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: 8px;
  padding: 1.1rem 1.3rem 1.3rem;
  font-size: 0.92em;
}

.cf-widget__hint {
  margin: 0 0 0.9rem;
  color: var(--md-default-fg-color--light);
  font-size: 0.95em;
}

.cf-widget__controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem 1.4rem;
  margin-bottom: 0.6rem;
}

.cf-widget__control {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  flex: 1 1 150px;
  font-size: 0.9em;
}

.cf-widget__control output {
  font-family: var(--md-code-font, monospace);
  font-feature-settings: "tnum" 1;
  color: var(--md-default-fg-color);
  opacity: 0.85;
}

.cf-widget input[type="range"] {
  width: 100%;
  accent-color: #12a594;
}

.cf-widget__svg {
  display: block;
  width: 100%;
  height: auto;
  margin: 0.4rem 0;
  font-family: var(--md-text-font, inherit);
  color: var(--md-default-fg-color);
}

.cf-widget__readout {
  margin: 0.6rem 0 0;
  font-size: 0.95em;
}

.cf-widget__readout strong {
  font-family: var(--md-code-font, monospace);
  font-feature-settings: "tnum" 1;
}

.cf-widget__readout--warn strong {
  color: #d05663;
}

.cf-widget__text--warn {
  color: #d05663;
}

.cf-widget__field {
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: 6px;
  padding: 0.4rem 0.6rem;
}

.cf-widget__field--invalid {
  border-color: #d05663;
}

.cf-widget__button {
  font: inherit;
  font-size: 0.88em;
  font-weight: 600;
  color: var(--md-default-fg-color);
  background: transparent;
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: 6px;
  padding: 0.4rem 0.9rem;
  cursor: pointer;
}

.cf-widget__button:hover:not(:disabled) {
  background: color-mix(in srgb, #12a594 12%, transparent);
  border-color: #12a594;
}

.cf-widget__button:focus-visible {
  outline: 2px solid #12a594;
  outline-offset: 1px;
}

.cf-widget__button:disabled {
  opacity: 0.45;
  cursor: default;
}

.cf-widget__row {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  flex-wrap: wrap;
  margin-bottom: 0.6rem;
}

/* Graceful degradation: an unmounted widget (JS disabled, or the script
   failed to load) collapses to nothing rather than showing an empty box.
   The static diagram directly above every widget already carries the lesson. */
.lesson-widget:empty {
  display: none;
}