/* Template One: course preview cards and modal */

/* =========================================================
   PRODUCT TEMPLATE ONE — COURSE PREVIEW (STATIC)
   ========================================================= */
.dd-preview-grid {
  padding: clamp(38px, 4.2vw, 54px) 0 clamp(54px, 7vw, 88px);
  background: var(--color-surface);
}

.dd-preview-grid__container {
  width: min(calc(100% - (var(--edge) * 2)), 1368px);
  margin: 0 auto;
}

.dd-preview-grid__header {
  max-width: 820px;
  margin: 0 auto clamp(34px, 4vw, 50px);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.dd-preview-grid__eyebrow {
  margin: 0;
  color: var(--color-cyan);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.dd-preview-grid__title {
  margin: 8px 0 0;
  color: var(--color-navy);
  font-size: clamp(2rem, 4vw, 3.25rem);
  line-height: 1.14;
  letter-spacing: -0.04em;
}

.dd-preview-grid__title strong {
  color: var(--color-blue);
}

.dd-preview-grid__underline {
  width: 76px;
  height: 4px;
  margin-top: 18px;
  border-radius: 999px;
  background: var(--color-red);
}

.dd-preview-grid__intro {
  max-width: 760px;
  margin: 20px 0 0;
  color: var(--color-slate);
  font-size: clamp(0.98rem, 1.35vw, 1.1rem);
  line-height: 1.75;
}

.dd-preview-grid__cards {
  --dd-preview-grid-gap: clamp(20px, 2.4vw, 30px);
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--dd-preview-grid-gap);
}

/* Keep two-card sets at the standard three-column card width and center the
   pair, leaving equal breathing room on both sides. */
.dd-preview-grid__cards--two {
  grid-template-columns: repeat(2, minmax(0, calc((100% - var(--dd-preview-grid-gap) - var(--dd-preview-grid-gap)) / 3)));
  justify-content: center;
}

.dd-preview-card {
  min-width: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: 20px;
  background: var(--color-white);
  box-shadow: 0 16px 42px rgba(10, 34, 86, 0.07);
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}

.dd-preview-card:hover {
  transform: translateY(-2px);
  border-color: rgba(8, 120, 237, 0.24);
  box-shadow: 0 22px 52px rgba(10, 34, 86, 0.1);
}

.dd-preview-card__media {
  position: relative;
  display: block;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: linear-gradient(135deg, #f4f8fd 0%, #e9f2fd 100%);
  text-decoration: none;
}

.dd-preview-card__image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.dd-preview-card__skeleton {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 72% 26%, rgba(8, 120, 237, 0.1) 0 12%, transparent 13%),
    linear-gradient(130deg, transparent 0 44%, rgba(255, 255, 255, 0.72) 50%, transparent 56%),
    linear-gradient(135deg, #f4f8fd 0%, #e9f2fd 100%);
  background-size: auto, 220% 100%, auto;
  animation: dd-preview-skeleton-shimmer 900ms ease-out 1;
}

.dd-preview-card__play {
  position: absolute;
  z-index: 2;
  inset: 50% auto auto 50%;
  width: 62px;
  height: 62px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  background: var(--color-red);
  box-shadow: 0 14px 28px rgba(223, 0, 31, 0.28);
  transform: translate(-50%, -50%);
}

.dd-preview-card__play i,
.dd-preview-card__play i::before {
  display: block;
  margin: 0;
  line-height: 1;
}

.dd-preview-card__play i {
  font-size: 1.1rem;
  transform: translateX(1px);
}

.dd-preview-card__tag {
  position: absolute;
  z-index: 2;
  left: 16px;
  bottom: 14px;
  padding: 7px 11px;
  border: 1px solid rgba(8, 120, 237, 0.1);
  border-radius: 999px;
  color: var(--color-navy);
  background: rgba(255, 255, 255, 0.94);
  font-size: 0.72rem;
  font-weight: 700;
}

.dd-preview-card__body {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: clamp(22px, 2.2vw, 30px);
  text-align: left;
}

.dd-preview-card__meta {
  display: inline-flex;
  align-items: center;
  justify-content: flex-start;
  gap: 7px;
  color: var(--color-blue);
  font-size: 0.8rem;
  font-weight: 600;
}

.dd-preview-card__meta i,
.dd-preview-card__meta i::before {
  display: block;
  margin: 0;
  line-height: 1;
}

.dd-preview-card h3 {
  margin: 12px 0 10px;
  color: var(--color-navy);
  font-size: clamp(1.1rem, 1.5vw, 1.34rem);
  line-height: 1.38;
}

.dd-preview-card p {
  margin: 0;
  color: var(--color-slate);
  font-size: 0.94rem;
  line-height: 1.7;
}

.dd-preview-card__description {
  color: var(--color-slate);
  font-size: 0.94rem;
  line-height: 1.7;
}

.dd-preview-card__description a,
.dd-preview-grid__intro a,
.dd-course-overview__description a,
.dd-coming-soon__description a {
  color: var(--color-blue);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.dd-preview-card__button {
  min-height: 48px;
  margin-top: 22px;
  padding: 11px 14px 11px 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  border: 1px solid rgba(8, 120, 237, 0.2);
  border-radius: 12px;
  color: var(--color-blue);
  background: var(--color-surface-blue);
  font-size: 0.92rem;
  font-weight: 700;
  text-decoration: none;
  transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.dd-preview-card__button:hover,
.dd-preview-card__button:focus-visible {
  color: var(--color-white);
  background: var(--color-blue);
  transform: translateY(-1px);
}

.dd-preview-card__button:focus-visible {
  outline: 3px solid rgba(8, 120, 237, 0.24);
  outline-offset: 4px;
}

.dd-preview-card__button-icon {
  width: 28px;
  height: 28px;
  flex: 0 0 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: var(--color-white);
  background: var(--color-blue);
}

.dd-preview-card__button:hover .dd-preview-card__button-icon,
.dd-preview-card__button:focus-visible .dd-preview-card__button-icon {
  color: var(--color-blue);
  background: var(--color-white);
}

.dd-preview-card__button-icon i,
.dd-preview-card__button-icon i::before {
  display: block;
  margin: 0;
  line-height: 1;
  font-size: 0.78rem;
}

@keyframes dd-preview-skeleton-shimmer {
  from { background-position: 0 0, 100% 0; }
  to { background-position: 0 0, -120% 0; }
}

@media (max-width: 1000px) {
  .dd-preview-grid__cards,
  .dd-preview-grid__cards--two {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 700px) {
  .dd-preview-grid {
    padding: 36px 0 48px;
  }

  .dd-preview-grid__cards,
  .dd-preview-grid__cards--two {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 420px) {
  .dd-preview-card {
    border-radius: 15px;
  }

  .dd-preview-card__body {
    padding: 20px;
  }

  .dd-preview-card__play {
    width: 54px;
    height: 54px;
  }
}