/* ==========================================================================
   УмКид — Courses Page v2
   ========================================================================== */

/* --- Hero ----------------------------------------------------------------- */
.courses-hero {
  padding-top: calc(var(--nav-height) + var(--space-16));
  padding-bottom: var(--space-10);
}

.courses-hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
}

/* --- Filters bar ---------------------------------------------------------- */
.courses-filter-bar {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  padding: var(--space-5) var(--space-6);
  margin-bottom: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.filter-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.filter-row-label {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 800;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  min-width: 70px;
  flex-shrink: 0;
}

.filter-row-divider {
  width: 1px;
  height: 20px;
  background: var(--color-border);
  flex-shrink: 0;
}

.filter-chip {
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  color: var(--color-text-muted);
  background: transparent;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 5px;
}

.filter-chip:hover {
  color: var(--color-primary);
  background: rgba(55, 138, 221, 0.06);
  border-color: rgba(55, 138, 221, 0.15);
}

.filter-chip.active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
  box-shadow: var(--shadow-primary);
}

.filter-chip[data-subject="math"].active    { background: var(--color-primary); }
.filter-chip[data-subject="russian"].active { background: var(--color-secondary); }
.filter-chip[data-subject="literature"].active { background: var(--color-purple); }
.filter-chip[data-subject="physics"].active { background: var(--color-accent); color: var(--color-text); }
.filter-chip[data-subject="english"].active { background: var(--color-coral); }

.courses-count-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
}

.courses-count-label {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  color: var(--color-text-muted);
}

.courses-count-num {
  color: var(--color-primary);
  font-weight: 900;
}

/* --- Courses grid --------------------------------------------------------- */
.courses-grid-v2 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.course-card-v2 {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: transform 0.3s var(--ease-out-soft), box-shadow 0.3s ease;
  cursor: pointer;
}

.course-card-v2:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.course-card-v2.hidden {
  display: none;
}

.course-cover {
  height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  position: relative;
  overflow: hidden;
}

.course-cover-emoji {
  position: relative;
  z-index: 1;
  filter: drop-shadow(0 4px 8px rgba(0,0,0,0.1));
}

.course-body {
  padding: var(--space-5) var(--space-6);
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.course-tags {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.course-title {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 800;
  color: var(--color-text);
  line-height: 1.3;
}

.course-meta-row {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-size: 13px;
  color: var(--color-text-muted);
}

.course-meta-item {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* Stars */
.course-stars {
  display: flex;
  gap: 2px;
}

.course-star {
  width: 14px;
  height: 14px;
  color: var(--color-accent);
}

.course-star.empty {
  color: var(--color-border);
}

.course-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--color-border-subtle);
  background: rgba(55, 138, 221, 0.02);
}

.course-price {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 900;
  color: var(--color-text);
}

.course-price-period {
  font-size: 12px;
  color: var(--color-text-muted);
  font-weight: 500;
}

/* Empty state */
.courses-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: var(--space-16) 0;
  display: none;
}

.courses-empty.show {
  display: block;
}

.courses-empty-icon {
  font-size: 52px;
  margin-bottom: var(--space-4);
}

.courses-empty-title {
  font-size: 20px;
  font-weight: 800;
  margin-bottom: var(--space-3);
}

.courses-empty-sub {
  color: var(--color-text-muted);
}

/* --- Responsive ----------------------------------------------------------- */
@media (max-width: 1024px) {
  .courses-grid-v2 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .courses-hero-inner { grid-template-columns: 1fr; }
  .courses-grid-v2 { grid-template-columns: repeat(2, 1fr); }
  .filter-row { gap: var(--space-2); }
  .filter-row-label { min-width: 60px; font-size: 11px; }
}

@media (max-width: 480px) {
  .courses-grid-v2 { grid-template-columns: 1fr; }
  .filter-row-label { display: none; }
  .filter-row-divider { display: none; }
}