/* ==========================================================================
   PRACTICE.CSS — In-lesson practice & project validation panels
   ========================================================================== */

.practice-panel {
  margin: var(--space-lg) 0;
  padding: var(--space-lg);
  background-color: #fff;
  border: 2px solid var(--bg-dark);
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 24px rgba(13, 13, 13, 0.06);
}

.practice-panel--project {
  border-color: var(--text-primary);
  background: linear-gradient(180deg, #fff 0%, rgba(13, 13, 13, 0.02) 100%);
}

.practice-panel__header {
  margin-bottom: var(--space-md);
}

.practice-panel__eyebrow {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--bg-light);
  background-color: var(--bg-dark);
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  margin-bottom: var(--space-xs);
}

.practice-panel__title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 0.35rem;
}

.practice-panel__hint {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-bottom: var(--space-md);
}

.practice-progress {
  height: 6px;
  background-color: rgba(13, 13, 13, 0.08);
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 0.35rem;
}

.practice-progress__bar {
  height: 100%;
  width: 0%;
  background-color: var(--bg-dark);
  border-radius: 999px;
  transition: width 0.35s ease;
}

.practice-progress__label {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.practice-workspace {
  margin-bottom: var(--space-md);
}

.practice-workspace label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
  color: var(--text-primary);
}

.practice-code,
.practice-output-input {
  width: 100%;
  padding: var(--space-md);
  font-family: ui-monospace, "Cascadia Code", "Consolas", monospace;
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--text-primary);
  background-color: #fafafa;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  resize: vertical;
  min-height: 8rem;
}

.practice-code:focus,
.practice-output-input:focus {
  outline: none;
  border-color: var(--text-primary);
  box-shadow: 0 0 0 3px rgba(17, 17, 17, 0.08);
}

.practice-expected {
  margin-bottom: var(--space-md);
  padding: var(--space-md);
  background-color: rgba(13, 13, 13, 0.04);
  border-radius: var(--radius-md);
}

.practice-expected__title {
  font-size: 0.8125rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
  color: var(--text-primary);
}

.practice-expected pre {
  margin: 0;
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--text-secondary);
  white-space: pre-wrap;
}

.practice-checklist {
  border: none;
  margin: 0 0 var(--space-md);
  padding: 0;
}

.practice-checklist legend {
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
}

.practice-check {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  padding: 0.6rem 0;
  font-size: 0.9375rem;
  color: var(--text-secondary);
  cursor: pointer;
  border-bottom: 1px solid rgba(217, 217, 217, 0.6);
}

.practice-check:last-child {
  border-bottom: none;
}

.practice-check input {
  width: 1.125rem;
  height: 1.125rem;
  margin-top: 0.15rem;
  flex-shrink: 0;
  accent-color: var(--bg-dark);
  cursor: pointer;
}

.practice-check:has(input:checked) {
  color: var(--text-primary);
}

.practice-check:has(input:checked) span {
  text-decoration: line-through;
  opacity: 0.75;
}

.practice-output-check {
  margin-bottom: var(--space-md);
}

.practice-output-check label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.practice-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: var(--space-sm);
  padding: 0.55rem 1.1rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--bg-light);
  background-color: var(--bg-dark);
  border: none;
  border-radius: 999px;
  cursor: pointer;
  transition: opacity var(--transition);
}

.practice-btn:hover {
  opacity: 0.88;
}

.practice-feedback {
  margin-top: var(--space-sm);
  font-size: 0.875rem;
  line-height: 1.5;
}

.practice-feedback--ok {
  color: #0d5c2e;
}

.practice-feedback--warn {
  color: #8a5a00;
}

.practice-feedback[hidden] {
  display: none;
}

.practice-success {
  padding: var(--space-lg);
  text-align: center;
  background-color: var(--bg-dark);
  color: var(--bg-light);
  border-radius: var(--radius-md);
  animation: practice-success-in 0.45s ease;
}

.practice-success[hidden] {
  display: none;
}

.practice-success__icon {
  display: block;
  font-size: 2rem;
  margin-bottom: var(--space-xs);
}

.practice-success__title {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
}

.practice-success__text {
  font-size: 0.9375rem;
  color: #c8c8c8;
  line-height: 1.55;
}

@media (max-width: 640px) {
  .practice-panel {
    padding: var(--space-md);
  }
}

/* ==========================================================================
   QUIZ.CSS — Interactive quizzes in lessons
   ========================================================================== */
.quiz-panel {
  margin: var(--space-lg) 0;
  padding: var(--space-lg);
  background-color: #fff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 24px rgba(13, 13, 13, 0.04);
}

.quiz-panel__header {
  margin-bottom: var(--space-md);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: var(--space-xs);
}

.quiz-panel__eyebrow {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
  margin-bottom: var(--space-xs);
}

.quiz-panel__title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 0.35rem;
}

.quiz-question {
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-md);
  border-bottom: 1px dashed var(--border-color);
}

.quiz-question:last-of-type {
  border-bottom: none;
  margin-bottom: var(--space-sm);
  padding-bottom: 0;
}

.quiz-question__text {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.quiz-option {
  display: flex;
  align-items: center;
  position: relative;
  padding: 0.75rem var(--space-sm);
  background-color: #fafafa;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.quiz-option:hover {
  background-color: rgba(13, 13, 13, 0.02);
  border-color: var(--text-primary);
}

.quiz-option input[type="radio"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.quiz-option__indicator {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.125rem;
  height: 1.125rem;
  border: 1px solid var(--border-color);
  border-radius: 50%;
  margin-right: var(--space-sm);
  background-color: #fff;
  flex-shrink: 0;
  transition: all var(--transition);
}

.quiz-option__indicator::after {
  content: "";
  width: 0.5rem;
  height: 0.5rem;
  background-color: var(--bg-dark);
  border-radius: 50%;
  transform: scale(0);
  transition: transform var(--transition);
}

.quiz-option input[type="radio"]:checked ~ .quiz-option__indicator {
  border-color: var(--bg-dark);
}

.quiz-option input[type="radio"]:checked ~ .quiz-option__indicator::after {
  transform: scale(1);
}

.quiz-option input[type="radio"]:checked ~ .quiz-option__text {
  color: var(--text-primary);
  font-weight: 500;
}

.quiz-option.is-selected {
  border-color: var(--text-primary);
  background-color: rgba(13, 13, 13, 0.02);
  color: var(--text-primary);
}

/* Feedback states */
.quiz-option.is-correct {
  border-color: #0d5c2e;
  background-color: rgba(13, 92, 46, 0.04);
  color: #0d5c2e;
}

.quiz-option.is-correct .quiz-option__indicator {
  border-color: #0d5c2e;
  background-color: #0d5c2e;
}

.quiz-option.is-correct .quiz-option__indicator::after {
  background-color: #fff;
  transform: scale(1);
}

.quiz-option.is-incorrect {
  border-color: #a30000;
  background-color: rgba(163, 0, 0, 0.04);
  color: #a30000;
}

.quiz-option.is-incorrect .quiz-option__indicator {
  border-color: #a30000;
  background-color: #a30000;
}

.quiz-option.is-incorrect .quiz-option__indicator::after {
  background-color: #fff;
  transform: scale(1);
}

.quiz-feedback {
  margin-top: var(--space-sm);
  padding: var(--space-sm);
  font-size: 0.875rem;
  border-radius: var(--radius-sm);
  line-height: 1.5;
  display: none;
}

.quiz-feedback.is-visible {
  display: block;
}

.quiz-feedback--correct {
  background-color: rgba(13, 92, 46, 0.05);
  border-left: 3px solid #0d5c2e;
  color: #0d5c2e;
}

.quiz-feedback--incorrect {
  background-color: rgba(163, 0, 0, 0.05);
  border-left: 3px solid #a30000;
  color: #a30000;
}

.quiz-btn-submit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: var(--space-sm);
  padding: 0.6rem 1.2rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--bg-light);
  background-color: var(--bg-dark);
  border: none;
  border-radius: 999px;
  cursor: pointer;
  transition: opacity var(--transition);
}

.quiz-btn-submit:hover {
  opacity: 0.88;
}

.quiz-btn-submit:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Custom styles for roadmap layout */
.roadmap-timeline {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
  margin: var(--space-lg) 0;
  position: relative;
}

.roadmap-card {
  background: #fff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  transition: all var(--transition);
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.roadmap-card:hover {
  border-color: var(--text-primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(13,13,13,0.04);
}

.roadmap-card__tag {
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
}

.roadmap-card__title {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--text-primary);
}

.roadmap-card__desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.roadmap-card__lessons {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin-top: var(--space-xs);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.roadmap-card__lesson-link {
  text-decoration: underline;
  font-weight: 500;
  color: var(--text-primary);
}

.roadmap-card__lesson-link:hover {
  opacity: 0.8;
}

.study-planner {
  margin: var(--space-lg) 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-md);
}

.study-week {
  background-color: rgba(13, 13, 13, 0.02);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-md);
}

.study-week__title {
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
  color: var(--text-primary);
}

.study-week__desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: var(--space-sm);
}

.study-week__items {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding-left: 1rem;
  list-style-type: disc;
}