.network-quiz {
  margin: 1rem 0;
  padding: .9rem;
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: .7rem;
  background: var(--md-code-bg-color);
  box-shadow: 0 .15rem .5rem rgb(0 0 0 / 6%);
}
.network-quiz fieldset { border: 0; margin: .6rem 0 .45rem; padding: 0; min-width: 0; }
.network-quiz legend { font-weight: 600; margin-bottom: .65rem; font-size: .92rem; line-height: 1.4; }
.network-quiz .quiz-option {
  display: flex;
  align-items: center;
  gap: .55rem;
  min-height: 2rem;
  padding: .32rem .6rem;
  margin: .2rem 0;
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: .4rem;
  font-size: .77rem;
  line-height: 1.35;
  cursor: pointer;
  background: var(--md-default-bg-color);
  transition: border-color .15s ease, background-color .15s ease;
}
.network-quiz .quiz-option:hover { border-color: var(--md-accent-fg-color); }
.network-quiz input {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  opacity: 0;
}
.network-quiz .quiz-option:focus-within { outline: 2px solid var(--md-accent-fg-color); }
.network-quiz .quiz-option__marker {
  display: grid;
  flex: 0 0 1.45rem;
  width: 1.45rem;
  height: 1.45rem;
  place-items: center;
  border: 1px solid var(--md-default-fg-color--light);
  border-radius: 50%;
  color: var(--md-default-fg-color--light);
  font-size: .7rem;
  font-weight: 700;
}
.network-quiz .quiz-option__text { font-weight: 400; }
.network-quiz .quiz-selected .quiz-option__text { font-weight: 500; }
.network-quiz .quiz-selected {
  border-color: var(--md-accent-fg-color);
  background: var(--md-accent-fg-color--transparent);
}
.network-quiz .quiz-selected .quiz-option__marker {
  border-color: var(--md-accent-fg-color);
  color: var(--md-accent-fg-color);
}
.network-quiz .quiz-correct { border-color: #388e3c; }
.network-quiz .quiz-correct .quiz-option__marker { border-color: #388e3c; color: #388e3c; }
.network-quiz .quiz-correct .quiz-option__marker { font-size: 0; }
.network-quiz .quiz-correct .quiz-option__marker::before { content: "✓"; font-size: .8rem; }
.network-quiz .quiz-incorrect { border-color: #d84315; }
.network-quiz .quiz-incorrect .quiz-option__marker { border-color: #d84315; color: #d84315; }
.network-quiz .quiz-incorrect .quiz-option__marker { font-size: 0; }
.network-quiz .quiz-incorrect .quiz-option__marker::before { content: "×"; font-size: .9rem; }
.network-quiz .md-button { margin: .4rem .5rem .4rem 0; white-space: normal; }
.network-quiz .md-button:disabled {
  opacity: 1;
  border-color: #3f3f46;
  color: #a1a1aa;
  background: #27272a;
  box-shadow: none;
  cursor: not-allowed;
}
.network-quiz .quiz-submit { margin: 0 0 0 auto; }
.network-quiz .quiz-question-actions > button:not(.quiz-exit) { margin: 0 0 0 auto; }
.network-quiz [hidden] { display: none; }
.network-quiz .quiz-feedback:empty { display: none; }
.network-quiz .quiz-feedback {
  margin: .5rem 0;
  overflow: hidden;
  border-left: .25rem solid var(--md-default-fg-color--light);
  border-radius: .35rem;
  background: var(--md-default-bg-color);
}
.network-quiz .quiz-feedback--correct { border-left-color: #388e3c; }
.network-quiz .quiz-feedback--incorrect { border-left-color: #d84315; }
.network-quiz .quiz-feedback__status {
  margin: 0;
  padding: .32rem .55rem;
  font-size: .82rem;
  font-weight: 600;
}
.network-quiz .quiz-feedback--correct .quiz-feedback__status { color: #2e7d32; }
.network-quiz .quiz-feedback--incorrect .quiz-feedback__status { color: #bf360c; }
.network-quiz .quiz-feedback__explanation {
  padding: .35rem .55rem;
  border-top: 1px solid var(--md-default-fg-color--lightest);
  font-size: .74rem;
  font-weight: 400;
  line-height: 1.45;
}
.network-quiz .quiz-feedback__label {
  display: block;
  margin-bottom: .15rem;
  color: var(--md-default-fg-color--light);
  font-size: .64rem;
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
}
.network-quiz .quiz-feedback__explanation p { margin: 0; }
.network-quiz .quiz-feedback__explanation p + p { margin-top: .2rem; }
.network-quiz .quiz-progress {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 0 0 .35rem;
  color: var(--md-default-fg-color--light);
  font-size: .75rem;
  font-weight: 700;
}
.network-quiz .quiz-progress__section { display: flex; gap: .35rem; align-items: center; }
.network-quiz .quiz-progress__icon { font-size: .9rem; }
.network-quiz .quiz-progress-bar {
  height: .18rem;
  overflow: hidden;
  border-radius: 1rem;
  background: var(--md-default-fg-color--lightest);
}
.network-quiz .quiz-progress-bar__value {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--md-accent-fg-color);
  transition: width .2s ease;
}
.network-quiz .quiz-result-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin: .75rem 0 .25rem;
}
.network-quiz .quiz-result-actions .md-button { margin: 0; }
.network-quiz .quiz-download {
  border-color: var(--md-accent-fg-color);
  color: var(--md-accent-fg-color);
}
.network-quiz .quiz-share-status {
  min-height: 1.2em;
  margin: .25rem 0;
  color: var(--md-default-fg-color--light);
  font-size: .72rem;
}
.network-quiz .quiz-selection {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(12rem, 100%), 1fr));
  gap: .75rem;
  margin-top: 1rem;
}
.network-quiz .quiz-card {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: .15rem .75rem;
  align-items: center;
  width: 100%;
  padding: .9rem 1rem;
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: .45rem;
  color: var(--md-default-fg-color);
  font: inherit;
  text-align: left;
  background: var(--md-default-bg-color);
  cursor: pointer;
}
.network-quiz .quiz-card:not(:disabled):hover {
  border-color: var(--md-accent-fg-color);
  box-shadow: 0 .15rem .4rem rgb(0 0 0 / 10%);
}
.network-quiz .quiz-card:focus-visible {
  outline: 2px solid var(--md-accent-fg-color);
  outline-offset: 2px;
}
.network-quiz .quiz-card__icon {
  grid-column: 1;
  grid-row: 1 / span 2;
  align-self: center;
  font-size: 1.3rem;
}
.network-quiz .quiz-card__title { grid-column: 2; font-weight: 700; }
.network-quiz .quiz-card__count {
  grid-column: 2;
  color: var(--md-default-fg-color--light);
  font-size: .8rem;
}
.network-quiz .quiz-card__arrow {
  grid-column: 3;
  grid-row: 1 / span 2;
  color: var(--md-accent-fg-color);
  font-size: 1.3rem;
}

.network-quiz .quiz-card:disabled { opacity: .58; cursor: not-allowed; box-shadow: none; }


/* Контраст и размеры интерактивных элементов в графитовой теме */
.network-quiz {
  padding: 0.9rem 1rem;
  border-color: #27272a;
  border-radius: 0.9rem;
  background: radial-gradient(ellipse at 8% 0%, #34d3990c, transparent 55%), #111113;
  box-shadow: none;
}

.challenge-lead {
  max-width: 44rem;
  margin: 0 0 1rem;
  color: #b8b8c0;
  font-size: 0.9rem;
  line-height: 1.5;
}

.network-quiz .challenge-noscript {
  color: var(--md-default-fg-color--light);
}

.network-quiz > h2 {
  margin: 0 0 0.6rem;
  padding: 0;
  color: #e4e4e7;
  border: 0;
  font-size: 1.05rem;
}

.network-quiz > p {
  margin: 0.4rem 0 0.75rem;
  color: #b8b8c0;
}

.network-quiz legend {
  color: #d4d4d8;
}

.network-quiz .quiz-option {
  min-height: 2.75rem;
  padding: 0.5rem 0.75rem;
  border-color: #3f3f46;
  border-radius: 0.55rem;
  font-size: 0.88rem;
  color: #c4c4ca;
  background: #18181b;
}

.network-quiz .quiz-option:hover:not(.quiz-selected) {
  border-color: #71717a;
}

.network-quiz .quiz-selected {
  border-color: #34d399;
}

.network-quiz .quiz-selected {
  background: #34d39918;
}

.network-quiz .quiz-selected .quiz-option__text {
  color: #d4d4d8;
}

.network-quiz .quiz-option__marker {
  color: #d4d4d8;
}

.network-quiz .quiz-correct,
.network-quiz .quiz-correct .quiz-option__marker {
  border-color: #34d399;
  color: #6ee7b7;
}

.network-quiz .quiz-incorrect,
.network-quiz .quiz-incorrect .quiz-option__marker {
  border-color: #fb7185;
  color: #fda4af;
}

.network-quiz .quiz-feedback {
  background: #18181b;
}

.network-quiz .quiz-feedback--correct { border-left-color: #34d399; }
.network-quiz .quiz-feedback--incorrect { border-left-color: #fb7185; }
.network-quiz .quiz-feedback--correct .quiz-feedback__status { color: #6ee7b7; }
.network-quiz .quiz-feedback--incorrect .quiz-feedback__status { color: #fda4af; }
.network-quiz .quiz-feedback__explanation {
  color: #c4c4ca;
  font-size: 0.82rem;
}
.network-quiz .quiz-progress { font-size: 0.82rem; }
.network-quiz .quiz-share-status { font-size: 0.78rem; }
.network-quiz .quiz-card__title { color: #c4c4ca; }
.network-quiz .quiz-card__count { font-size: 0.82rem; }
.network-quiz .quiz-card {
  min-height: 4.5rem;
  border-color: #27272a;
  border-radius: 0.9rem;
  background: #18181b;
}
.network-quiz .quiz-card__arrow { color: #a1a1aa; }
.network-quiz .quiz-card:not(:disabled):hover {
  border-color: #52525b;
  background: #1c1c1f;
}
.network-quiz .quiz-card:not(:disabled):hover .quiz-card__arrow { color: #34d399; }

.md-typeset .network-quiz .quiz-back {
  min-height: 2.5rem;
  padding: 0.55rem 0.9rem;
  border: 1px solid #3f3f46;
  border-radius: 0.55rem;
  color: #d4d4d8;
  font-weight: 600;
  background: #18181b;
  box-shadow: none;
}

.md-typeset .network-quiz .quiz-back:hover {
  border-color: #71717a;
  color: #f4f4f5;
  background: #27272a;
}

.md-typeset .network-quiz .quiz-back:focus-visible {
  outline: 2px solid #a7f3d0;
  outline-offset: 3px;
}

.network-quiz .quiz-question-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-top: 0.75rem;
}

.md-typeset .network-quiz .quiz-exit {
  flex: 0 0 auto;
  min-height: 2rem;
  margin: 0;
  padding: 0.35rem 0.65rem;
  border: 1px solid #3f3f46;
  border-radius: 0.5rem;
  color: #d4d4d8;
  font-size: 0.76rem;
  background: #18181b;
  box-shadow: none;
}

.md-typeset .network-quiz .quiz-exit:hover {
  border-color: #34d399;
  color: #6ee7b7;
  background: #18181b;
}

.md-typeset .network-quiz .quiz-exit:focus-visible {
  outline: 2px solid #a7f3d0;
  outline-offset: 3px;
}

@media screen and (max-width: 600px) {
  .network-quiz {
    padding: 0.75rem;
  }

  .network-quiz .quiz-option {
    align-items: flex-start;
  }

  .network-quiz .quiz-question-actions {
    flex-wrap: wrap;
  }

  .network-quiz .quiz-exit {
    min-height: 2.5rem;
  }

  .network-quiz .quiz-result-actions .md-button {
    flex: 1 1 100%;
    min-height: 2.75rem;
    margin: 0;
  }
}