/* =====================================================================
   Courses discovery — Chessable Author x Cameo hybrid
   Sections (top → bottom):
     1. Header: title + tagline + search
     2. Learning paths: 3 race-themed PathCards
     3. Filter bar: race chip rail + sort dropdown
     4. Catalog grid of CoursePreviewCards
   ==================================================================== */

.courses-discovery {
  max-width: var(--container-2xl);
  margin: 0 auto;
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

/* ---- Header ------------------------------------------------------- */

.courses-discovery__header {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-6);
  align-items: end;
}

.courses-discovery__head-left {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.courses-discovery__eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wider);
  color: var(--color-text-subtle);
  text-transform: uppercase;
}

.courses-discovery__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 600;
  letter-spacing: var(--tracking-display);
  color: var(--color-text);
  line-height: var(--leading-tight);
}

.courses-discovery__tagline {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.courses-discovery__search {
  width: 380px;
  max-width: 100%;
}

/* ---- Section heads ------------------------------------------------ */

.courses-discovery__section {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.courses-discovery__section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.courses-discovery__section-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-display);
  color: var(--color-text);
}

.courses-discovery__section-hint,
.courses-discovery__count {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-subtle);
  letter-spacing: var(--tracking-wide);
}

/* ---- Learning paths row ------------------------------------------- */

.course-paths {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.course-paths__skeleton {
  border-radius: var(--radius-lg);
}

.path-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition:
    transform var(--duration-medium) var(--ease-out),
    border-color var(--duration-medium) var(--ease-out),
    box-shadow var(--duration-medium) var(--ease-out);
  text-decoration: none;
  color: inherit;
  min-height: 280px;
}

.path-card:hover {
  transform: translateY(-2px);
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-md);
}

.path-card__bar {
  height: 4px;
  width: 100%;
  flex-shrink: 0;
}

.path-card--terran .path-card__bar {
  background: linear-gradient(90deg, var(--color-race-terran), transparent);
}
.path-card--protoss .path-card__bar {
  background: linear-gradient(90deg, var(--color-race-protoss), transparent);
}
.path-card--zerg .path-card__bar {
  background: linear-gradient(90deg, var(--color-race-zerg), transparent);
}

/* Race-tinted background overlay */
.path-card--terran {
  background:
    linear-gradient(135deg, rgba(86, 194, 255, 0.06), transparent 60%),
    var(--color-bg-raised);
}
.path-card--protoss {
  background:
    linear-gradient(135deg, rgba(247, 201, 72, 0.06), transparent 60%),
    var(--color-bg-raised);
}
.path-card--zerg {
  background:
    linear-gradient(135deg, rgba(167, 139, 250, 0.06), transparent 60%),
    var(--color-bg-raised);
}
.path-card--terran:hover  { border-color: rgba(86, 194, 255, 0.4); }
.path-card--protoss:hover { border-color: rgba(247, 201, 72, 0.4); }
.path-card--zerg:hover    { border-color: rgba(167, 139, 250, 0.4); }

.path-card.is-highlight {
  background:
    linear-gradient(135deg, rgba(196, 107, 255, 0.06), transparent 60%),
    rgba(15, 19, 28, 0.7);
  border-color: rgba(196, 107, 255, 0.3);
}

.path-card__body {
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  flex: 1;
}

.path-card__eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-text-subtle);
}

.path-card--terran  .path-card__eyebrow { color: var(--color-race-terran); }
.path-card--protoss .path-card__eyebrow { color: var(--color-race-protoss); }
.path-card--zerg    .path-card__eyebrow { color: var(--color-race-zerg); }

.path-card__title {
  margin: var(--space-1) 0 0;
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: var(--weight-semibold);
  line-height: var(--leading-tight);
  color: var(--color-text);
}

.path-card__tagline {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: var(--leading-snug);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.path-card__lessons {
  margin: var(--space-2) 0 0;
  padding: 0 0 0 var(--space-4);
  list-style: disc;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.path-card__lessons li {
  line-height: var(--leading-snug);
}

.path-card__meta {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-subtle);
  margin-top: var(--space-2);
}

.path-card__progress {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.path-card__progress-bar {
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-pill);
  overflow: hidden;
}

.path-card__progress-fill {
  height: 100%;
  background: var(--color-accent);
}

.path-card--terran  .path-card__progress-fill { background: var(--color-race-terran); }
.path-card--protoss .path-card__progress-fill { background: var(--color-race-protoss); }
.path-card--zerg    .path-card__progress-fill { background: var(--color-race-zerg); }

.path-card__progress-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-subtle);
}

.path-card__cta {
  margin-top: var(--space-3);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-wide);
  color: var(--color-accent);
}

.path-card--terran  .path-card__cta { color: var(--color-race-terran); }
.path-card--protoss .path-card__cta { color: var(--color-race-protoss); }
.path-card--zerg    .path-card__cta { color: var(--color-race-zerg); }

/* ---- Filter bar --------------------------------------------------- */

.courses-discovery__filterbar {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  flex-wrap: wrap;
}

.courses-discovery__filter-group {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.courses-discovery__filter-grouplabel {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wider);
  color: var(--color-text-subtle);
}

.courses-discovery__filter-sep {
  width: 1px;
  height: 20px;
  background: var(--color-border);
}

.courses-discovery__fchip {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border-strong);
  background: rgba(0, 0, 0, 0.2);
  color: var(--color-text-muted);
  cursor: pointer;
  transition:
    color var(--duration-fast) var(--ease-out),
    background var(--duration-fast) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out);
}

.courses-discovery__fchip:hover {
  color: var(--color-text);
  border-color: var(--color-text-muted);
}

.courses-discovery__fchip.is-active {
  background: var(--color-accent-soft);
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.courses-discovery__fchip--terran.is-active {
  background: rgba(86, 194, 255, 0.14);
  color: var(--color-race-terran);
  border-color: var(--color-race-terran);
}
.courses-discovery__fchip--protoss.is-active {
  background: rgba(247, 201, 72, 0.14);
  color: var(--color-race-protoss);
  border-color: var(--color-race-protoss);
}
.courses-discovery__fchip--zerg.is-active {
  background: rgba(167, 139, 250, 0.14);
  color: var(--color-race-zerg);
  border-color: var(--color-race-zerg);
}

.courses-discovery__sort {
  margin-left: auto;
}

/* ---- Catalog grid + course preview cards -------------------------- */

.courses-discovery__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-4);
}

.coach-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-3);
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: inherit;
  position: relative;
  transition:
    transform var(--duration-medium) var(--ease-out),
    border-color var(--duration-medium) var(--ease-out),
    box-shadow var(--duration-medium) var(--ease-out);
}

.coach-card::before {
  content: '';
  position: absolute;
  left: 0;
  top: var(--space-3);
  bottom: var(--space-3);
  width: 2px;
  border-radius: 2px;
  opacity: 0.5;
}

.coach-card--terran::before  { background: var(--color-race-terran); }
.coach-card--protoss::before { background: var(--color-race-protoss); }
.coach-card--zerg::before    { background: var(--color-race-zerg); }

.coach-card:hover {
  transform: translateY(-2px);
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-md);
}

.coach-card--terran:hover  { border-color: rgba(86, 194, 255, 0.4); }
.coach-card--protoss:hover { border-color: rgba(247, 201, 72, 0.4); }
.coach-card--zerg:hover    { border-color: rgba(167, 139, 250, 0.4); }

.course-card__cover {
  position: relative;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: var(--space-2);
  background-color: var(--color-bg-elevated);
}

.course-card__cover--terran {
  background:
    linear-gradient(135deg, rgba(86, 194, 255, 0.18), rgba(31, 95, 168, 0.10)),
    var(--color-bg-elevated);
}

.course-card__cover--protoss {
  background:
    linear-gradient(135deg, rgba(247, 201, 72, 0.18), rgba(180, 130, 30, 0.10)),
    var(--color-bg-elevated);
}

.course-card__cover--zerg {
  background:
    linear-gradient(135deg, rgba(167, 139, 250, 0.18), rgba(111, 45, 176, 0.12)),
    var(--color-bg-elevated);
}

.course-card__cover--placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
}

.course-card__cover-letter {
  font-family: var(--font-display);
  font-size: 56px;
  font-weight: var(--weight-bold);
  color: var(--color-text-subtle);
}

.course-card__cover-shade {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(0, 0, 0, 0.45));
  pointer-events: none;
}

.course-card__cover-pill {
  position: absolute;
  top: var(--space-2);
  right: var(--space-2);
  z-index: 1;
}

.course-card__cover-pill--owned {
  background: var(--color-success-soft);
  color: var(--color-success);
  border: 1px solid var(--color-success);
  border-radius: var(--radius-pill);
  padding: 2px 8px;
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
}

.course-card__body {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.course-card__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
  line-height: var(--leading-snug);
  color: var(--color-text);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.course-card__instructor {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.course-card__instructor-avatar {
  width: 22px;
  height: 22px;
  border-radius: var(--radius-circle);
  flex-shrink: 0;
  object-fit: cover;
}

.course-card__instructor-avatar--placeholder {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--color-text-muted);
  font-weight: var(--weight-semibold);
}

.course-card__instructor-name {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.course-card__stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-subtle);
}

.course-card__stat--rating {
  color: var(--color-star-on);
}

.course-card__foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: var(--space-2);
  padding-top: var(--space-2);
  border-top: 1px solid var(--color-border);
  gap: var(--space-2);
}

.course-card__price {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
  color: var(--color-text);
}

.course-card__cta {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-wide);
  color: var(--color-accent);
}

/* ---- Pagination --------------------------------------------------- */

.courses-discovery__pagination {
  display: flex;
  justify-content: center;
  margin-top: var(--space-4);
}

/* ---- Responsive --------------------------------------------------- */

@media (max-width: 900px) {
  .course-paths {
    grid-template-columns: 1fr;
  }
  .courses-discovery__header {
    grid-template-columns: 1fr;
  }
  .courses-discovery__search {
    width: 100%;
  }
}

@media (max-width: 600px) {
  .courses-discovery {
    padding: var(--space-3);
    gap: var(--space-5);
  }
  .courses-discovery__grid {
    grid-template-columns: 1fr;
  }
  .courses-discovery__filterbar {
    padding: var(--space-3);
  }
  .courses-discovery__sort {
    margin-left: 0;
    width: 100%;
  }
}