/* =========================================================
   dd-theme — Course detail page styles
   Layout rules for woocommerce/single-product.php override.
   Uses dd-theme CSS variables. Responsive breakpoints at 820px
   and 540px. Purchase card is sticky on desktop, static on
   mobile. Video lightbox is a fixed overlay.
   ========================================================= */

/* ---------- Hero layout ---------- */
.dd-course-hero-layout {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 48px;
  align-items: start;
}

.dd-course-hero-text {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.dd-course-hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.dd-course-hero-title {
  font: 700 1em/1.05 var(--serif);
  font-size: clamp(32px, 4vw, 48px);
  letter-spacing: -0.02em;
  color: var(--ink);
}

.dd-course-hero-subtitle {
  font: 400 17px/1.6 var(--sans);
  color: var(--muted);
  max-width: 600px;
}

.dd-course-hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  align-items: center;
}

.dd-course-stat {
  display: flex;
  align-items: center;
  gap: 6px;
  font: 500 14px/1 var(--sans);
  color: var(--ink-soft);
}

.dd-course-stat svg {
  color: var(--ink-1);
}

.dd-course-instructor {
  display: flex;
  align-items: center;
  gap: 10px;
  font: 500 14.5px/1.3 var(--sans);
  color: var(--ink-soft);
}

.dd-course-instructor-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--paper);
  display: flex;
  align-items: center;
  justify-content: center;
  font: 700 14px/1 var(--sans);
  color: var(--ink-1);
}

/* ---------- Purchase card (sticky sidebar) ---------- */
.dd-purchase-card {
  position: sticky;
  top: 160px;
  background: var(--off-white);
  border: 1px solid var(--hair);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.dd-purchase-video {
  position: relative;
  aspect-ratio: 16 / 9;
  background: var(--ink-3);
  cursor: pointer;
  overflow: hidden;
}

.dd-purchase-video img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.dd-purchase-video-play {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(20, 20, 43, 0.3);
  transition: background 0.15s ease;
}

.dd-purchase-video:hover .dd-purchase-video-play {
  background: rgba(20, 20, 43, 0.45);
}

.dd-purchase-video-play svg {
  width: 56px;
  height: 56px;
  color: var(--cream);
  filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.3));
}

.dd-purchase-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.dd-purchase-price {
  font: 800 32px/1 var(--sans);
  color: var(--ink-1);
  letter-spacing: -0.02em;
}

.dd-purchase-price s {
  font-weight: 500;
  font-size: 18px;
  color: var(--muted-2);
  margin-left: 8px;
}

.dd-purchase-cta {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.dd-purchase-meta {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-top: 14px;
  border-top: 1px solid var(--hair);
}

.dd-purchase-meta-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font: 500 13.5px/1.3 var(--sans);
  color: var(--ink-soft);
}

.dd-purchase-meta-item svg {
  flex-shrink: 0;
  color: var(--ink-1);
}

/* ---------- Tabs layout ---------- */
.dd-course-tabs-layout {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 48px;
  align-items: start;
}

.dd-course-tabs-main {
  min-width: 0;
}

/* ---------- Temario accordion ---------- */
.dd-temario-item {
  border-bottom: 1px solid var(--hair);
}

.dd-temario-item > button {
  width: 100%;
  text-align: left;
  background: none;
  border: 0;
  padding: 18px 0;
  display: flex;
  align-items: center;
  gap: 14px;
  cursor: pointer;
  transition: color 0.15s ease;
}

.dd-temario-item > button:hover {
  color: var(--ink-1);
}

.dd-temario-num {
  font: 600 24px/1 var(--serif);
  font-style: italic;
  color: var(--ink-1);
  min-width: 36px;
}

.dd-temario-title {
  font: 600 16px/1.3 var(--sans);
  color: var(--ink);
  flex: 1;
}

.dd-temario-chevron {
  transition: transform 0.2s ease;
  color: var(--ink-1);
  flex-shrink: 0;
}

.dd-temario-item.open .dd-temario-chevron {
  transform: rotate(45deg);
}

.dd-temario-body {
  display: none;
  padding: 0 0 18px 50px;
  color: var(--ink-soft);
  font: 400 15px/1.6 var(--sans);
}

.dd-temario-item.open .dd-temario-body {
  display: block;
}

.dd-temario-lessons {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.dd-temario-lesson {
  display: flex;
  align-items: center;
  gap: 8px;
  font: 400 14px/1.4 var(--sans);
  color: var(--ink-soft);
}

.dd-temario-lesson svg {
  flex-shrink: 0;
  color: var(--ink-1);
}

/* ---------- Certification sidebar ---------- */
.dd-cert-card {
  background: var(--off-white);
  border: 1px solid var(--hair);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.dd-cert-card-title {
  font: 700 16px/1.2 var(--sans);
  color: var(--ink);
}

.dd-cert-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font: 500 14px/1.4 var(--sans);
  color: var(--ink-soft);
}

.dd-cert-item svg {
  flex-shrink: 0;
  color: var(--success);
  margin-top: 2px;
}

.dd-compare-card {
  background: var(--paper);
  border: 1px dashed var(--hair-2);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.dd-compare-card-title {
  font: 700 15px/1.2 var(--sans);
  color: var(--ink);
}

.dd-compare-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid var(--hair);
  font: 500 13.5px/1.3 var(--sans);
  color: var(--ink-soft);
}

.dd-compare-row:last-child {
  border-bottom: 0;
}

/* ---------- Video lightbox ---------- */
.dd-lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 10000;
  align-items: center;
  justify-content: center;
}

.dd-lightbox.open {
  display: flex;
}

.dd-lightbox__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(20, 20, 43, 0.85);
  cursor: pointer;
}

.dd-lightbox__content {
  position: relative;
  width: 90vw;
  max-width: 960px;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius);
  overflow: hidden;
  z-index: 1;
}

.dd-lightbox__content iframe {
  width: 100%;
  height: 100%;
  border: 0;
}

.dd-lightbox__close {
  position: absolute;
  top: 16px;
  right: 16px;
  z-index: 2;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 0;
  background: rgba(251, 247, 238, 0.15);
  color: var(--cream);
  font-size: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s ease;
}

.dd-lightbox__close:hover {
  background: rgba(251, 247, 238, 0.3);
}

/* ---------- Related courses ---------- */
.dd-related-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

/* =========================================================
   RESPONSIVE
   ========================================================= */

@media (max-width: 820px) {
  .dd-course-hero-layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .dd-purchase-card {
    position: static;
  }

  .dd-course-tabs-layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .dd-related-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .dd-lightbox__content {
    width: 95vw;
  }

  .dd-temario-body {
    padding-left: 36px;
  }
}

@media (max-width: 540px) {
  .dd-related-grid {
    grid-template-columns: 1fr;
  }

  .dd-purchase-video-play svg {
    width: 42px;
    height: 42px;
  }

  .dd-purchase-price {
    font-size: 26px;
  }

  .dd-temario-num {
    font-size: 20px;
    min-width: 28px;
  }

  .dd-temario-body {
    padding-left: 0;
  }
}