/* Column */
.column {
  flex-shrink: 0;
  width: var(--col-width);
  height: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: fadeInUp 0.3s ease both;
  transition: border-color 0.2s;
  max-height: calc(100vh - 130px);
  max-height: calc(100dvh - 130px);
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

.column.drag-over {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), 0 8px 32px var(--accent-glow);
}

/* Column header */
.column-header {
  padding: 14px 16px 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.column-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.column-title {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  min-width: 0;
  flex: 1;
  outline: none;
  background: transparent;
  border: none;
  color: var(--text);
  cursor: text;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.column-title:focus { color: var(--accent); }

.column-count {
  font-size: 0.7rem;
  color: var(--text-muted);
  background: var(--surface2);
  border-radius: 4px;
  padding: 2px 6px;
  min-width: 22px;
  text-align: center;
}

.col-drag-handle {
  cursor: grab;
  touch-action: none;
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1;
  padding-right: 2px;
  opacity: 0.35;
  transition: opacity 0.15s;
  flex-shrink: 0;
  user-select: none;
}
.column-header:hover .col-drag-handle { opacity: 0.8; }
.col-drag-handle:active { cursor: grabbing; }

/* Column drag states */
.column.col-drop-left  { box-shadow: -3px 0 0 var(--accent); }
.column.col-drop-right { box-shadow:  3px 0 0 var(--accent); }
.column.dragging-col   { opacity: 0.4; }

/* Collapsed column group */
.collapsed-group {
  flex-shrink: 0;
  width: calc(var(--col-width) + 6px);
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-self: flex-start;
  max-height: calc(100vh - 130px);
  max-height: calc(100dvh - 130px);
  overflow-y: auto;
}

.column--collapsed { height: auto; }
.column--collapsed .cards,
.column--collapsed .add-card-btn { display: none; }

/* Column menu button */
.col-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1.1rem;
  line-height: 1;
  padding: 2px 6px;
  border-radius: 4px;
  transition: all 0.15s;
  opacity: 0;
}

.column-header:hover .col-btn { opacity: 0.55; }
.col-btn:hover { opacity: 1 !important; color: var(--text); background: var(--surface2); }

/* Cards area */
.cards {
  flex: 1;
  padding: 12px;
  min-height: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  overflow-y: scroll;
}

.cards.drag-active {
  background: rgba(124,106,247,0.04);
  border-radius: 8px;
}

/* Add card button */
.add-card-btn {
  margin: 4px 12px 12px;
  padding: 8px;
  border: 1px dashed var(--border);
  border-radius: 8px;
  background: none;
  color: var(--text-muted);
  font-family: 'DM Mono', monospace;
  font-size: 0.75rem;
  cursor: pointer;
  transition: all 0.15s;
  text-align: left;
  letter-spacing: 0.02em;
}

.add-card-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
}

/* Add column button */
.add-column-btn {
  flex-shrink: 0;
  align-self: flex-start;
  width: var(--col-width);
  height: 56px;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  background: none;
  color: var(--text-muted);
  font-family: 'DM Mono', monospace;
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.2s;
  letter-spacing: 0.04em;
}

.add-column-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
}