/* ============================================
   iHuB Courses Page Styles
   Phase 5: Courses Page
   ============================================ */

/* ------------------------------------------
   Filter Tabs
   ------------------------------------------ */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-8);
  justify-content: center;
}

.filter-btn {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-4);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--colour-text-secondary);
  background-color: var(--colour-background);
  border: 1px solid var(--colour-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  min-height: 40px;
}

.filter-btn:hover,
.filter-btn:focus-visible {
  border-color: var(--colour-secondary);
  color: var(--colour-primary);
  outline: none;
}

.filter-btn[aria-pressed="true"] {
  background-color: var(--colour-primary);
  color: var(--colour-text-inverse);
  border-color: var(--colour-primary);
}

.filter-btn[aria-pressed="true"]:hover {
  background-color: var(--colour-primary-light);
  border-color: var(--colour-primary-light);
}

/* ------------------------------------------
   Course Cards
   ------------------------------------------ */
.course-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  text-align: left;
}

.course-image {
  aspect-ratio: 16 / 9;
  background-color: var(--colour-background-alt);
  border: 1px solid var(--colour-border);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-5);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--colour-text-muted);
  font-size: var(--text-sm);
}

.course-category {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  color: var(--colour-accent-dark);
  margin-bottom: var(--space-2);
}

.course-title {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  margin-bottom: var(--space-3);
  color: var(--colour-primary);
}

.course-description {
  color: var(--colour-text-secondary);
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-4);
  flex-grow: 1;
}

.course-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
  padding-top: var(--space-4);
  border-top: 1px solid var(--colour-border);
}

.course-meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--colour-text-muted);
}

.course-meta-item svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
}

/* ------------------------------------------
   Why Learn With Us
   ------------------------------------------ */
.feature-card {
  text-align: center;
  padding: var(--space-6);
}

.feature-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto var(--space-5);
  background-color: var(--colour-background-alt);
  border: 1px solid var(--colour-primary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--colour-primary);
}

.feature-icon svg {
  width: 24px;
  height: 24px;
  stroke: currentColor;
  stroke-width: 1.5;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.feature-title {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  color: var(--colour-primary);
  margin-bottom: var(--space-3);
}

.feature-description {
  color: var(--colour-text-secondary);
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
}

/* ------------------------------------------
   Empty State
   ------------------------------------------ */
.courses-empty {
  text-align: center;
  padding: var(--space-10) var(--space-5);
  grid-column: 1 / -1;
}

.courses-empty-title {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  color: var(--colour-primary);
  margin-bottom: var(--space-3);
}

.courses-empty-text {
  color: var(--colour-text-secondary);
  max-width: 400px;
  margin: 0 auto;
}