/* Task 1 — Complexity Ladder Quiz (scoped; inherits site CSS variables from body) */

.task1-quiz {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-color);
}

.task1-quiz__intro {
  margin-bottom: 2rem;
  padding: 1.25rem 1.5rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  border-left: 4px solid var(--secondary-color);
}

.task1-quiz__intro h3 {
  margin-top: 0;
  margin-bottom: 0.75rem;
  color: var(--primary-color);
  font-size: 1.25rem;
}

.task1-quiz__intro p {
  margin-bottom: 0.75rem;
  text-align: left;
}

.task1-quiz__intro ul {
  margin: 0;
  padding-left: 1.25rem;
}

.task1-quiz__intro li {
  margin-bottom: 0.5rem;
}

.task1-quiz__intro ol.task1-quiz__properties {
  margin: 0.5rem 0 0;
  padding-left: 1.5rem;
}

.task1-quiz__intro ol.task1-quiz__properties > li {
  margin-bottom: 1rem;
  padding-left: 0.35rem;
}

.task1-quiz__intro ol.task1-quiz__properties > li:last-child {
  margin-bottom: 0;
}

.task1-quiz__intro ol.task1-quiz__properties > li > strong {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--secondary-color);
}

.task1-quiz__intro .task1-quiz__property-detail {
  margin: 0 0 0.25rem;
  font-size: 0.95rem;
  text-align: left;
}

.task1-quiz__set {
  margin-bottom: 2.5rem;
  scroll-margin-top: 5rem;
}

.task1-quiz__set-title {
  font-size: 1.35rem;
  color: var(--primary-color);
  margin-bottom: 1.25rem;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--border-color);
}

.task1-quiz__cards {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.task1-quiz__card {
  background: var(--bg-secondary);
  border: 2px solid var(--border-color);
  border-radius: 8px;
  padding: 1.25rem 1.35rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.task1-quiz__card--correct {
  border-color: #27ae60;
  box-shadow: 0 0 0 1px rgba(39, 174, 96, 0.25);
}

.task1-quiz__card--incorrect {
  border-color: #c0392b;
  box-shadow: 0 0 0 1px rgba(192, 57, 43, 0.2);
}

.task1-quiz__question-text {
  margin: 0 0 1rem;
  text-align: left;
  font-weight: 500;
}

/* Segmented radios */
.task1-quiz__fieldset {
  border: none;
  margin: 0 0 1rem;
  padding: 0;
}

.task1-quiz__legend {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--primary-color);
}

.task1-quiz__visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.task1-quiz__segment-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.task1-quiz__segment-label {
  display: inline-flex;
  align-items: center;
  cursor: pointer;
  font-size: 0.8rem;
  line-height: 1.25;
  padding: 0.45rem 0.55rem;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background: var(--bg-color);
  color: var(--text-color);
  transition: background 0.15s ease, border-color 0.15s ease;
  max-width: 100%;
}

.task1-quiz__segment-label:hover {
  border-color: var(--secondary-color);
}

.task1-quiz__segment {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

.task1-quiz__segment:focus-visible + .task1-quiz__segment-label {
  outline: 2px solid var(--secondary-color);
  outline-offset: 2px;
}

.task1-quiz__segment:checked + .task1-quiz__segment-label {
  background: var(--secondary-color);
  color: #fff;
  border-color: var(--secondary-color);
}

.task1-quiz__segment:disabled + .task1-quiz__segment-label {
  opacity: 0.55;
  cursor: not-allowed;
}

.task1-quiz__textarea {
  width: 100%;
  min-height: 5.5rem;
  padding: 0.65rem 0.75rem;
  font: inherit;
  line-height: 1.5;
  color: var(--text-color);
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  resize: vertical;
  margin-bottom: 0.75rem;
  box-sizing: border-box;
}

.task1-quiz__textarea:focus {
  outline: none;
}

.task1-quiz__textarea:focus-visible {
  outline: 2px solid var(--secondary-color);
  outline-offset: 2px;
}

.task1-quiz__textarea:disabled {
  opacity: 0.75;
  cursor: not-allowed;
}

.task1-quiz__field-error {
  font-size: 0.85rem;
  color: var(--accent-color);
  margin: -0.35rem 0 0.75rem;
}

.task1-quiz__feedback {
  margin-top: 0.5rem;
  padding: 0.85rem 1rem;
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-size: 0.9rem;
}

.task1-quiz__feedback[hidden] {
  display: none !important;
}

.task1-quiz__verdict {
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.task1-quiz__verdict--ok {
  color: #27ae60;
}

.task1-quiz__verdict--bad {
  color: #c0392b;
}

.task1-quiz__feedback-row {
  margin-bottom: 0.35rem;
}

.task1-quiz__feedback-row:last-child {
  margin-bottom: 0;
}

.task1-quiz__set-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1rem;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

.task1-quiz__btn {
  font: inherit;
  cursor: pointer;
  padding: 0.55rem 1.1rem;
  border-radius: 6px;
  border: 1px solid var(--border-color);
  background: var(--bg-color);
  color: var(--text-color);
  transition: background 0.15s ease, border-color 0.15s ease;
}

.task1-quiz__btn:hover:not(:disabled) {
  background: var(--bg-secondary);
  border-color: var(--secondary-color);
}

.task1-quiz__btn:focus {
  outline: none;
}

.task1-quiz__btn:focus-visible {
  outline: 2px solid var(--secondary-color);
  outline-offset: 2px;
}

.task1-quiz__btn--primary {
  background: var(--secondary-color);
  color: #fff;
  border-color: var(--secondary-color);
}

.task1-quiz__btn--primary:hover:not(:disabled) {
  filter: brightness(1.05);
  background: var(--secondary-color);
}

.task1-quiz__btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.task1-quiz__score {
  font-weight: 600;
  color: var(--primary-color);
}

.task1-quiz__set-error {
  flex-basis: 100%;
  font-size: 0.9rem;
  color: var(--accent-color);
  margin: 0;
}

@media (max-width: 640px) {
  .task1-quiz__segment-wrap {
    flex-direction: column;
  }

  .task1-quiz__segment-label {
    width: 100%;
    box-sizing: border-box;
  }
}