.kanban-board {
  display: grid;
  grid-template-columns: repeat(var(--kanban-cols, 4), 1fr);
  gap: 1rem;
  padding-bottom: 1rem;
}

.kanban-column {
  min-width: 0;
  display: flex;
  flex-direction: column;
  background-color: #f0f2f5;
  border-radius: 8px;
  max-height: 80vh;
  overflow: hidden;
}

.kanban-column-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  background-color: #e2e5ea;
  border-radius: 8px 8px 0 0;
  font-weight: bold;
  font-size: 0.95rem;
  position: sticky;
  top: 0;
}

.kanban-column-title {
  flex: 1;
  word-break: break-word;
}

.kanban-column-count {
  background-color: #fff;
  color: #555;
  border-radius: 12px;
  padding: 0.1em 0.55em;
  font-size: 0.8rem;
  margin-left: 0.5rem;
  min-width: 1.5em;
  text-align: center;
}

.kanban-column-body {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 0.75rem;
  overflow-y: auto;
  flex: 1;
  min-height: 60px;
  transition: background-color 0.15s ease;
}

.kanban-card {
  background-color: #fff;
  border-radius: 6px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
  padding: 0.75rem;
  transition: box-shadow 0.15s ease;
}

.kanban-card:hover {
  box-shadow: 0 3px 8px rgba(0, 0, 0, 0.18);
}

.kanban-card-title {
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 0.4rem;
  word-break: break-word;
}

.kanban-card-title a {
  color: inherit;
  text-decoration: none;
}

.kanban-card-title a:hover {
  text-decoration: underline;
  color: var(--primary-color, #337ab7);
}

.kanban-card-image {
  margin: 0.4rem 0;
  border-radius: 4px;
  overflow: hidden;
}

.kanban-card-image img {
  width: 100%;
  height: 120px;
  object-fit: cover;
  display: block;
}

.kanban-card--overdue {
  border-left: 3px solid #d9534f;
  background-color: #fff8f8;
}

.kanban-card--overdue:hover {
  box-shadow: 0 3px 8px rgba(217, 83, 79, 0.25);
}

.kanban-card-date {
  font-size: 0.78rem;
  color: #777;
  margin-top: 0.35rem;
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.kanban-card-date--overdue {
  color: #d9534f;
  font-weight: 600;
}

.kanban-overdue-badge {
  display: inline-block;
  background-color: #d9534f;
  color: #fff;
  font-size: 0.68rem;
  font-weight: 700;
  padding: 0.05em 0.4em;
  border-radius: 10px;
  margin-left: 0.1rem;
}

.kanban-card-people {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  margin-top: 0.4rem;
}

.kanban-person-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 50%;
  font-size: 0.6rem;
  font-weight: 700;
  color: #fff;
  background-color: #aaa;
  flex-shrink: 0;
  cursor: default;
  user-select: none;
}

.kanban-card-actions {
  display: flex;
  gap: 0.25rem;
  margin-top: 0.5rem;
  justify-content: flex-end;
}

.kanban-add-btn {
  display: block;
  padding: 0.5rem;
  text-align: center;
  border-top: 1px solid #d0d4db;
  background: transparent;
  color: #999;
  font-size: 1.3rem;
  line-height: 1;
  text-decoration: none;
  opacity: 0;
  transition:
    opacity 0.15s ease,
    background-color 0.15s ease,
    color 0.15s ease;
  border-radius: 0 0 8px 8px;
}

.kanban-column:hover .kanban-add-btn {
  opacity: 1;
}

.kanban-add-btn:hover {
  background-color: #d0d4db;
  color: #333;
  text-decoration: none;
}

.kanban-empty-column {
  text-align: center;
  color: #aaa;
  font-size: 0.85rem;
  padding: 1rem 0;
}

/* ---- Drag-and-drop states ---- */

.kanban-card:not([data-no-drag]) {
  cursor: grab;
}

.kanban-card--ghost {
  opacity: 0.4;
}

.kanban-card--chosen {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
}

.kanban-card--dragging {
  cursor: grabbing;
  transform: rotate(1.5deg);
}

.kanban-card--loading {
  opacity: 0.6;
  pointer-events: none;
  position: relative;
}

.kanban-card--loading::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.55)
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24'%3E%3Ccircle cx='12' cy='12' r='10' stroke='%23aaa' stroke-width='3' fill='none' stroke-dasharray='32' stroke-dashoffset='10'%3E%3CanimateTransform attributeName='transform' type='rotate' from='0 12 12' to='360 12 12' dur='0.8s' repeatCount='indefinite'/%3E%3C/circle%3E%3C/svg%3E")
    center / 24px no-repeat;
  border-radius: 6px;
}

.kanban-card--error {
  border: 2px solid #d9534f;
  background-color: #fff5f5;
}

.kanban-column-body.sortable-over {
  background-color: #e8f0fe;
  border-radius: 0 0 8px 8px;
  outline: 2px dashed #aac4f0;
  outline-offset: -4px;
}

/* -------------------------------- */

@media (max-width: 900px) {
  .kanban-board {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .kanban-board {
    grid-template-columns: 1fr;
  }

  .kanban-column {
    max-height: none;
  }

  .kanban-column-body {
    max-height: 400px;
  }
}