/* ==========================================================================
   Dự Án Tiêu Biểu / Latest Featured Projects Component
   Scope: [du_an_tieu_bieu] / [du_an_moi_nhat]
   Layout: Style 1 - 3 columns grid on desktop, 2 columns tablet, mobile swipe/grid
   ========================================================================== */

.duan-tb-wrapper {
  position: relative;
  width: 100%;
  box-sizing: border-box;
  --duantb-primary: var(--primary-color, #0e5f8a);
  --duantb-primary-hover: #0a4c70;
  --duantb-dark: #0a2239;
  --duantb-border: #e2e8f0;
  --duantb-text: #1e293b;
  --duantb-muted: #64748b;
  --duantb-radius: 8px;
  --duantb-shadow: 0 4px 20px rgba(10, 34, 57, 0.06);
  --duantb-shadow-hover: 0 14px 32px rgba(10, 34, 57, 0.12);
}

/* --------------------------------------------------------------------------
   Desktop Layout (>= 992px): CSS Grid
   -------------------------------------------------------------------------- */
.duan-tb-track {
  display: grid;
  grid-template-columns: repeat(var(--duantb-cols, 3), 1fr);
  gap: 24px;
  width: 100%;
  margin: 0;
  padding: 0;
  list-style: none;
  position: relative;
}

/* Explicit column helpers for 100% reliable layout across all browsers & UX Builder */
.duan-tb-wrapper[style*="--duantb-cols: 1"] .duan-tb-track { grid-template-columns: 1fr !important; }
.duan-tb-wrapper[style*="--duantb-cols: 2"] .duan-tb-track { grid-template-columns: repeat(2, 1fr) !important; }
.duan-tb-wrapper[style*="--duantb-cols: 3"] .duan-tb-track { grid-template-columns: repeat(3, 1fr) !important; }
.duan-tb-wrapper[style*="--duantb-cols: 4"] .duan-tb-track { grid-template-columns: repeat(4, 1fr) !important; }

/* UX Builder Iframe Specific Rules */
.ux-builder-iframe .duan-tb-wrapper {
  margin-bottom: 25px;
}
.ux-builder-iframe .duan-tb-card {
  pointer-events: auto !important;
}

/* --------------------------------------------------------------------------
   Project Card Item
   -------------------------------------------------------------------------- */
.duan-tb-card {
  background: #ffffff;
  border: 1px solid var(--duantb-border);
  border-radius: var(--duantb-radius);
  overflow: hidden;
  box-shadow: var(--duantb-shadow);
  display: flex;
  flex-direction: column;
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1),
    box-shadow 0.35s cubic-bezier(0.16, 1, 0.3, 1),
    border-color 0.25s ease;
  position: relative;
  box-sizing: border-box;
}

.duan-tb-card:hover {
  border-color: #cbd5e1;
  transform: translateY(-6px);
  box-shadow: var(--duantb-shadow-hover);
}

.duan-tb-card-link {
  text-decoration: none !important;
  color: inherit;
  display: flex;
  flex-direction: column;
  height: 100%;
}

/* --------------------------------------------------------------------------
   Media Thumbnail (16:10 aspect ratio)
   -------------------------------------------------------------------------- */
.duan-tb-media {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background-color: #f1f5f9;
}

.duan-tb-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  -webkit-user-drag: none;
  user-drag: none;
}

.duan-tb-card:hover .duan-tb-media img {
  transform: scale(1.06);
}

.duan-tb-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: #94a3b8;
  gap: 8px;
  font-size: 13px;
  background: #f8fafc;
}

/* Floating Category Badge over Thumbnail */
.duan-tb-badge {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(10, 34, 57, 0.8);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: #ffffff;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.4px;
  text-transform: uppercase;
  padding: 4px 11px;
  border-radius: 4px;
  z-index: 2;
  transition: background 0.25s ease;
}

.duan-tb-card:hover .duan-tb-badge {
  background: var(--duantb-primary);
}

/* --------------------------------------------------------------------------
   Card Body Content
   -------------------------------------------------------------------------- */
.duan-tb-body {
  padding: 20px 22px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
  box-sizing: border-box;
}

.duan-tb-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  color: var(--duantb-muted);
  margin-bottom: 8px;
}

.duan-tb-cat-label {
  font-weight: 600;
  color: var(--duantb-primary);
}

.duan-tb-meta-sep {
  color: #cbd5e1;
}

.duan-tb-spec {
  color: #475569;
  font-weight: 500;
}

.duan-tb-title {
  font-size: 19px;
  font-weight: 600;
  color: var(--duantb-dark);
  line-height: 1.35;
  margin: 0 0 16px 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color 0.25s ease;
}

.duan-tb-card:hover .duan-tb-title {
  color: var(--duantb-primary);
}

/* Card Action Footer */
.duan-tb-action {
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid #f1f5f9;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--duantb-primary);
}

.duan-tb-action .action-arrow {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: #f0f7fb;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.25s ease;
  color: var(--duantb-primary);
}

.duan-tb-card:hover .duan-tb-action .action-arrow {
  background: var(--duantb-primary);
  color: #ffffff;
}



/* --------------------------------------------------------------------------
   Tablet Responsive (768px - 991px): 2 columns
   -------------------------------------------------------------------------- */
@media (max-width: 991px) {
  .duan-tb-track {
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 18px !important;
  }
}

/* --------------------------------------------------------------------------
   Mobile Responsive (< 768px):
   Option A: Slider Mode (Smooth horizontal touch swipe)
   Option B: Grid Mode (1 column vertical stack)
   -------------------------------------------------------------------------- */

/* When mobile_layout = 'slider' */
@media (max-width: 767px) {
  .duan-tb-wrapper.is-mobile-slider .duan-tb-track {
    display: flex !important;
    grid-template-columns: none !important;
    gap: 0 !important;
    overflow-x: auto !important;
    -webkit-overflow-scrolling: touch !important;
    scrollbar-width: none !important;
    padding: 6px 0 16px 0 !important;
    margin: 0 !important;
    touch-action: pan-y !important;
    position: relative !important;
    cursor: grab !important;
    user-select: none !important;
    -webkit-user-select: none !important;
  }

  .duan-tb-wrapper.is-mobile-slider .duan-tb-track::-webkit-scrollbar {
    display: none !important;
  }

  .duan-tb-wrapper.is-mobile-slider .duan-tb-track.is-dragging {
    cursor: grabbing !important;
    cursor: -webkit-grabbing !important;
  }

  .duan-tb-wrapper.is-mobile-slider .duan-tb-track img,
  .duan-tb-wrapper.is-mobile-slider .duan-tb-track a {
    -webkit-user-drag: none !important;
    user-drag: none !important;
  }

  .duan-tb-wrapper.is-mobile-slider .duan-tb-card {
    flex: 0 0 100% !important;
    width: 100% !important;
    min-width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
  }

  .duan-tb-wrapper.is-mobile-slider [class*="reveal-"] {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
    pointer-events: auto !important;
  }

  /* When mobile_layout = 'grid' */
  .duan-tb-wrapper:not(.is-mobile-slider) .duan-tb-track {
    grid-template-columns: 1fr !important;
    gap: 20px !important;
  }
}

/* Dots Indicator for Mobile Slider */
.duan-tb-dots {
  display: none !important;
}

@media (max-width: 767px) {
  .duan-tb-wrapper.is-mobile-slider .duan-tb-dots {
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 8px !important;
    margin-top: 14px !important;
    padding: 4px 0 !important;
  }

  .duan-tb-dot {
    all: unset !important;
    display: inline-block !important;
    width: 8px !important;
    height: 8px !important;
    min-width: 8px !important;
    min-height: 8px !important;
    max-width: 8px !important;
    max-height: 8px !important;
    border-radius: 50% !important;
    background: #cbd5e1 !important;
    cursor: pointer !important;
    transition: all 0.25s ease !important;
    box-sizing: border-box !important;
  }

  .duan-tb-dot.is-active {
    background: var(--duantb-primary, #0e5f8a) !important;
    transform: scale(1.3) !important;
  }
}