/* DigiBox LMS styles (Phase 4) */

.db-learn {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 1100px) {
  .db-learn {
    grid-template-columns: 280px 1fr;
    align-items: start;
  }
}

.db-curriculum {
  position: sticky;
  top: 1rem;
}

.db-curriculum__item {
  display: flex;
  gap: 0.65rem;
  align-items: flex-start;
  padding: 0.7rem 0.75rem;
  border-radius: var(--db-radius-sm);
  color: var(--db-ink-muted);
  border: 1px solid transparent;
}

.db-curriculum__item:hover {
  background: var(--db-bg-muted);
  color: var(--db-ink);
}

.db-curriculum__item.is-active {
  background: var(--db-accent-soft);
  color: var(--db-accent-hover);
  border-color: transparent;
}

.db-curriculum__item.is-done {
  color: var(--db-success);
}

.db-player {
  border-radius: var(--db-radius-lg);
  overflow: hidden;
  background: #0D2C6B;
  aspect-ratio: 16 / 9;
  display: grid;
  place-items: center;
  color: #F8FAFC;
  margin-bottom: 1.25rem;
  border: 1px solid var(--db-border);
}

.db-player iframe,
.db-player video {
  width: 100%;
  height: 100%;
  border: 0;
}

.db-lesson-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: space-between;
  margin-top: 1.5rem;
}

.db-quiz-option {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  padding: 0.9rem 1rem;
  border: 1px solid var(--db-border-strong);
  border-radius: var(--db-radius-md);
  margin-bottom: 0.65rem;
  cursor: pointer;
  background: var(--db-bg-elevated);
  transition: border-color var(--db-duration) var(--db-ease), background var(--db-duration) var(--db-ease);
}

.db-quiz-option:hover {
  border-color: var(--db-accent);
  background: var(--db-accent-soft);
}

.db-cert {
  max-width: 720px;
  margin: 0 auto;
  padding: clamp(1.75rem, 4vw, 2.75rem);
  border: 1px solid var(--db-border);
  border-radius: var(--db-radius-xl);
  background:
    radial-gradient(ellipse at 10% 10%, rgba(13, 148, 136, 0.12), transparent 45%),
    var(--db-bg-elevated);
  text-align: center;
}

.db-cert__code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  letter-spacing: 0.08em;
  color: var(--db-accent);
  font-weight: 700;
}

.db-price {
  font-family: var(--db-font-display);
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.db-price s {
  font-size: 1rem;
  color: var(--db-ink-faint);
  font-weight: 500;
  margin-left: 0.35rem;
}