/* Intro text */
.courses-intro {
  max-width: 680px;
  margin: 0 0 2rem;
  font-size: 1.05rem;
  line-height: 1.8;
  opacity: 0.85;
}

/* Responsive project grid */
.course-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem;
  margin: 1.5rem 0 3rem;
  align-items: stretch;
}

/* Individual project card */
.course-card {
  display: flex;
  flex-direction: column;
  min-width: 0;
  overflow: hidden;

  border: 1px solid var(--main-border-color);
  border-radius: 14px;
  background: var(--card-bg);

  transition:
    border-color 180ms ease,
    transform 180ms ease,
    box-shadow 180ms ease;
}

.course-card:hover {
  transform: translateY(-3px);
  border-color: var(--link-color);
  box-shadow: 0 8px 24px rgb(0 0 0 / 12%);
}

/* Clickable image area */
.course-card__image {
  display: block;
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;

  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  line-height: 0;
  background: var(--main-bg);
}

/* Image fills the entire preview frame */
.course-card__image img {
  display: block;
  position: absolute;
  inset: 0;

  width: 100%;
  height: 100%;
  max-width: none;
  max-height: none;

  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 0;

  object-fit: cover;
  object-position: center;

  transition: transform 250ms ease;
}

.course-card:hover .course-card__image img {
  transform: scale(1.03);
}

/* Card content */
.course-card__body {
  display: flex;
  flex: 1;
  flex-direction: column;
  align-items: flex-start;

  padding: 1.25rem;
}

/* Category label */
.course-card__category {
  display: inline-block;
  margin-bottom: 0.2rem;

  color: var(--link-color);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  line-height: 1.5;
}

/* Project title */
.course-card h2 {
  margin: 0.55rem 0 0.45rem;
  font-size: 1.35rem;
  line-height: 1.35;
}

/* Title link */
.course-card__title {
  color: var(--heading-color);
  text-decoration: none !important;
}

.course-card__title:hover {
  color: var(--link-color);
}

/* Description */
.course-card p {
  margin: 0 0 1.25rem;
  font-size: 0.96rem;
  line-height: 1.75;
  opacity: 0.85;
}

/* Explore project button */
.course-card__link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;

  margin-top: auto;
  padding: 0.65rem 0.9rem;

  border: 1px solid var(--main-border-color);
  border-radius: 8px;

  color: var(--link-color);
  font-weight: 600;
  text-decoration: none !important;

  transition:
    background-color 180ms ease,
    color 180ms ease,
    border-color 180ms ease;
}

.course-card__link:hover {
  border-color: var(--link-color);
  background: var(--link-color);
  color: #fff !important;
}

/* Keyboard accessibility */
.course-card__image:focus-visible,
.course-card__title:focus-visible,
.course-card__link:focus-visible {
  outline: 2px solid var(--link-color);
  outline-offset: 3px;
}

/* Tablet and mobile */
@media (max-width: 700px) {
  .course-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 1.25rem;
  }

  .course-card__body {
    padding: 1rem;
  }
}

/* Respect reduced-motion preferences */
@media (prefers-reduced-motion: reduce) {
  .course-card,
  .course-card__image img,
  .course-card__link {
    transition: none;
  }

  .course-card:hover {
    transform: none;
    box-shadow: none;
  }

  .course-card:hover .course-card__image img {
    transform: none;
  }
}

/* Text-only course card */
.course-card--text-only {
  max-width: 520px;
}

.course-card--text-only .course-card__body {
  padding: 1.5rem;
}

.course-card--text-only .course-card__category {
  margin-bottom: 0.5rem;
}

.course-card--text-only h2 {
  margin-top: 0.25rem;
}