/* DSA Learn – step-by-step layout, breadcrumb, cards, detail */

.dsa-learn-hero {
  margin-bottom: 0.5rem;
}

.dsa-learn-hero .dsa-hero__jump-link {
  margin-top: 0.5rem;
}

.dsa-learn-breadcrumb {
  margin-bottom: 1rem;
  font-size: 0.9rem;
  color: var(--color-text-muted, #64748b);
}

.dsa-learn-breadcrumb__item {
  color: var(--color-accent, #2563eb);
  text-decoration: none;
}

.dsa-learn-breadcrumb__item:hover {
  text-decoration: underline;
}

.dsa-learn-breadcrumb__sep {
  color: var(--color-text-muted, #64748b);
  pointer-events: none;
}

.dsa-learn-loading,
.dsa-learn-error {
  padding: 1.5rem;
  text-align: center;
}

.dsa-learn-error__message {
  margin: 0 0 0.75rem;
}

.dsa-learn-error__retry {
  padding: 0.5rem 1rem;
  font-weight: 500;
  color: #fff;
  background: var(--color-accent, #2563eb);
  border: none;
  border-radius: var(--radius-sm, 6px);
  cursor: pointer;
}

.dsa-learn-error__retry:hover {
  opacity: 0.9;
}

.dsa-learn-step__header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.dsa-learn-step__title {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 600;
}

.dsa-learn-back {
  padding: 0.35rem 0.5rem;
  font-size: 0.9rem;
  color: var(--color-accent, #2563eb);
  background: none;
  border: none;
  cursor: pointer;
}

.dsa-learn-back:hover {
  text-decoration: underline;
}

.dsa-learn-topics {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 0.75rem;
}

.dsa-learn-topic-card {
  display: block;
  padding: 1rem;
  color: inherit;
  text-decoration: none;
  background: var(--dsa-surface-gray, #f1f5f9);
  border-radius: var(--radius-sm, 6px);
  box-shadow: var(--dsa-shadow-card, 0 4px 6px -1px rgb(0 0 0 / 0.1));
  transition: box-shadow 0.2s;
}

.dsa-learn-topic-card:hover {
  box-shadow: var(--dsa-shadow-card-hover, 0 8px 16px -4px rgba(0, 0, 0, 0.12));
}

.dsa-learn-topic-card__name {
  font-weight: 600;
  font-size: 1rem;
}

.dsa-learn-patterns {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 0.75rem;
}

.dsa-learn-pattern-card {
  display: block;
  width: 100%;
  padding: 1rem;
  text-align: left;
  font-size: 1rem;
  color: inherit;
  background: var(--dsa-surface-gray, #f1f5f9);
  border: none;
  border-radius: var(--radius-sm, 6px);
  box-shadow: var(--dsa-shadow-card, 0 4px 6px -1px rgb(0 0 0 / 0.1));
  cursor: pointer;
  transition: box-shadow 0.2s;
}

.dsa-learn-pattern-card:hover {
  box-shadow: var(--dsa-shadow-card-hover, 0 8px 16px -4px rgba(0, 0, 0, 0.12));
}

.dsa-learn-pattern-card__name {
  font-weight: 500;
}

.dsa-learn-empty {
  margin: 0;
  color: var(--color-text-muted, #64748b);
}

.dsa-learn-detail {
  max-width: 52rem;
}

.dsa-learn-detail__section {
  margin-bottom: 1.5rem;
}

.dsa-learn-detail__heading {
  margin: 0 0 0.35rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text-muted, #64748b);
}

.dsa-learn-detail__text {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.55;
}

.dsa-learn-questions {
  margin: 0;
  padding-left: 1.25rem;
  list-style: disc;
}

.dsa-learn-questions li {
  margin-bottom: 0.35rem;
}

.dsa-learn-question-item {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.dsa-learn-question-link {
  color: var(--color-accent, #2563eb);
  text-decoration: none;
}

.dsa-learn-question-link:hover {
  text-decoration: underline;
}

.dsa-learn-question-link:focus {
  outline: 2px solid var(--color-accent, #2563eb);
  outline-offset: 2px;
}

.dsa-learn-question-status {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.5rem;
  font-size: 0.85rem;
  color: var(--color-text-muted, #64748b);
  background: var(--dsa-surface-gray, #f1f5f9);
  border: 1px solid var(--color-border, #e2e8f0);
  border-radius: var(--radius-sm, 6px);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.dsa-learn-question-status:hover {
  background: var(--color-bg, #fff);
  border-color: var(--color-accent, #2563eb);
}

.dsa-learn-question-status:focus-visible {
  outline: 2px solid var(--color-accent, #2563eb);
  outline-offset: 2px;
}

.dsa-learn-question-status__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.1em;
  height: 1.1em;
  font-size: 0.95em;
  border: 1px solid currentColor;
  border-radius: 50%;
}

.dsa-learn-question-status__label {
  font-weight: 500;
}

.dsa-learn-question-status--done .dsa-learn-question-status__icon {
  background: #059669;
  border-color: #059669;
  color: #fff;
}

.dsa-learn-question-status--done {
  color: #047857;
}

.dsa-learn-question-status--to-revise .dsa-learn-question-status__icon {
  background: var(--color-revision-muted, #ede9fe);
  border-color: var(--color-revision, #7c3aed);
  color: var(--color-revision, #7c3aed);
}

.dsa-learn-question-status--to-revise {
  color: var(--color-revision, #7c3aed);
}

.dsa-learn-question-status--loading,
.dsa-learn-question-status:disabled {
  opacity: 0.7;
  pointer-events: none;
  cursor: not-allowed;
}