/* ==========================================================================
   TaskFlow Pro - Kanban Board Styles
   ========================================================================== */

.kanban-container {
  display: grid;
  grid-template-columns: repeat(4, minmax(280px, 1fr));
  gap: 1.25rem;
  align-items: start;
  min-height: calc(100vh - 250px);
  overflow-x: auto;
  padding-bottom: 1.5rem;
}

/* Kanban Column */
.kanban-column {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  max-height: calc(100vh - 220px);
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.kanban-column:hover {
  border-color: rgba(255, 255, 255, 0.14);
}

/* Column Header */
.kanban-column-header {
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
  position: relative;
}

.column-title-group {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.column-indicator {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.column-indicator.todo { background: var(--status-todo); box-shadow: 0 0 8px var(--status-todo); }
.column-indicator.inprogress { background: var(--status-inprogress); box-shadow: 0 0 8px var(--status-inprogress); }
.column-indicator.inreview { background: var(--status-inreview); box-shadow: 0 0 8px var(--status-inreview); }
.column-indicator.done { background: var(--status-done); box-shadow: 0 0 8px var(--status-done); }

.column-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
}

.column-count-badge {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.column-add-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}
.column-add-btn:hover {
  color: var(--text-primary);
  background: var(--bg-glass);
}

/* Column Task List Container (Drop Target) */
.kanban-cards-wrapper {
  padding: 0.85rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  overflow-y: auto;
  min-height: 120px;
  flex: 1;
  transition: background-color var(--transition-fast);
}

.kanban-cards-wrapper.drag-over {
  background: rgba(99, 102, 241, 0.08);
  border: 2px dashed var(--primary);
  border-radius: var(--radius-md);
}

/* Kanban Card */
.kanban-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.9rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  cursor: grab;
  user-select: none;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
  position: relative;
}

.kanban-card:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow: var(--shadow-md);
}

.kanban-card:active {
  cursor: grabbing;
}

.kanban-card.dragging {
  opacity: 0.45;
  transform: scale(0.96) rotate(1deg);
  border: 2px dashed var(--primary-light);
}

/* Card Header */
.kanban-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.kanban-card-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.35;
}

.kanban-card-desc {
  font-size: 0.8rem;
  color: var(--text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.4;
}

/* Card Subtasks Progress Bar */
.card-subtasks-progress {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.progress-bar-bg {
  width: 100%;
  height: 5px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
}
.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%);
  border-radius: var(--radius-full);
  transition: width var(--transition-normal);
}
.progress-text {
  font-size: 0.72rem;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
}

/* Card Footer */
.kanban-card-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border-color);
  padding-top: 0.5rem;
  margin-top: 0.2rem;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.card-meta-left {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.card-actions {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  opacity: 0.85;
}
.card-action-icon {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 3px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.card-action-icon:hover {
  color: var(--text-primary);
  background: var(--bg-tertiary);
}

/* Responsive adjustments */
@media (max-width: 1200px) {
  .kanban-container {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 680px) {
  .kanban-container {
    grid-template-columns: 1fr;
  }
}