/* ======================================================
   COURSE FILTER SHORTCODE  –  course-filter.css
   Đồng bộ thiết kế giao diện thanh bộ lọc từ Project Masonry
   ====================================================== */
.cf-root {
  --font-primary: var(--e-global-typography-primary-font-family);
  --font-secondary: var(--e-global-typography-secondary-font-family);
  --cl-accent: var(--e-global-color-primary);
  --white: #ffffff;
  --bg-sage-dark: #aacf4e;
  --bg-base: #dee5c5;
  --border: 16px;
  --inverted-height: 60px;
}
.cf-root {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0;
}

/* ── Thanh Công Cụ Lọc (Filter Bar) ── */
.cf-filter-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  padding: 24px 0;
  margin-bottom: 40px;
}

/* Khối Software Pills */
.cf-software-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.cf-software-filters button.cf-sw-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: 999px;
  border: 1.5px solid #e5e7eb;
  background: #ffffff;
  color: #6b7280;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.25s ease;
  user-select: none;
  font-family: inherit;
  line-height: 1;
}

.cf-software-filters button.cf-sw-pill:hover {
  border-color: #0061fe;
  color: #0061fe;
  background: #f0f6ff;
  transform: translateY(-1px);
  border-width: 1px;
}

.cf-software-filters button.cf-sw-pill.is-active {
  background: #0061fe;
  border-color: #0061fe;
  color: #ffffff;
  font-weight: 600;
}

.cf-sw-logo {
  width: 18px;
  height: 18px;
  object-fit: contain;
  transition: filter 0.25s ease;
}

/* Khối Căn Chỉnh Cấp Độ (Level Filter) */
.cf-level-filter {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  background: #f8fafc;
  padding: 8px 20px;
  border-radius: 12px;
  border: 1px solid #e2e8f0;
}

.cf-lvl-text {
  font-size: 14px;
  font-weight: 600;
  color: #334155;
  min-width: 65px;
  text-align: left;
}

.cf-lvl-icons {
  display: flex;
  align-items: flex-end;
  gap: 6px;
}

.cf-lvl-icon {
  cursor: pointer;
  transition: all 0.2s ease;
  transform-origin: bottom center;
}

.cf-lvl-icon:hover {
  transform: scale(1.1);
}

.cf-lvl-icon.off {
  opacity: 0.25;
  filter: grayscale(100%);
}

.cf-lvl-icon.on {
  opacity: 1;
  filter: none;
}

/* ======================================================
   LƯỚI HIỂN THỊ KHÓA HỌC (Tái sử dụng card từ course-grid.css)
   ====================================================== */
.cf-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

/* ── Trạng thái rỗng không có kết quả ── */
.cf-no-posts {
  text-align: center;
  padding: 64px 1rem;
  color: #6b7280;
  font-size: 15px;
  border: 1px dashed #e5e7eb;
  border-radius: 12px;
  background: #fafafa;
}

/* ======================================================
   CẤU HÌNH ĐÁP ỨNG THIẾT BỊ (RESPONSIVE)
   ====================================================== */
@media (max-width: 991px) {
  .cf-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .cf-filter-bar {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 576px) {
  .cf-grid {
    grid-template-columns: 1fr;
  }
}