/* === 컬럼 설정 패널 === */
.column-config-panel {
    background: transparent;
    border-radius: 0;
    box-shadow: none;
    overflow: hidden;
    font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    display: flex;
    flex-direction: column;
    height: 100%;
    padding: 12px;
    color: var(--krds-color-light-gray-20, #e0e0e0);
}

/* 컬럼 리스트 컨테이너 */
.column-list-container {
    border: 1px solid var(--krds-color-light-gray-90, #1a1a1a);
    border-radius: 6px;
    background: transparent;
    overflow-y: auto;
    flex: 1;
    min-height: 0;
}

/* 컬럼 통계 */
.column-stats {
    padding: 8px 12px;
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--krds-color-light-gray-80, #2a2a2a);
    margin-bottom: 0;
}

#column-stats-text {
    font-size: 13px;
    font-weight: 700;
    letter-spacing: -0.01em;
}

/* 컬럼 아이템 */
.column-item {
    display: flex;
    align-items: center;
    padding: 10px 12px;
}


.column-item:hover {
    background: rgba(255, 255, 255, 0.03);
}

/* 체크박스 래퍼 */
.column-checkbox-wrapper {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
    position: relative;
}

.column-checkbox {
    position: absolute;
    top: 0;
    left: 0;
    opacity: 0;
    width: 1px;
    height: 1px;
    pointer-events: none;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
}

.column-label {
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    color: var(--krds-color-light-gray-20, #e0e0e0);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-width: 0;
    user-select: none;
}

.column-label::before {
    content: "";
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
    background: #ef4444;
    box-shadow: 0 0 4px rgba(0, 0, 0, 0.3);
    transition: all 0.2s ease;
}

.column-checkbox:checked+.column-label::before {
    background: #22c55e;
    box-shadow: 0 0 6px rgba(34, 197, 94, 0.5);
}

.column-checkbox:not(:checked)+.column-label {
    opacity: 0.7;
}

.column-checkbox:not(:checked)+.column-label:hover {
    opacity: 1;
}

.column-type {
    font-size: 11px;
    font-weight: 500;
    color: #fff;
    background: var(--krds-color-light-gray-70, #4a4a4a);
    padding: 2px 6px;
    border-radius: 10px;
    flex-shrink: 0;
}

/* 컬럼 컨트롤 */
.column-item .column-controls {
    display: flex;
    flex-direction: column;
    gap: 2px;
    flex-shrink: 0;
}

.move-up,
.move-down {
    width: 22px;
    height: 18px;
    border: none;
    background: var(--krds-color-light-gray-80, #3a3a3a);
    color: #fff;
    cursor: pointer;
    border-radius: 3px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s ease;
    padding: 0;
    font-size: 12px;
    font-weight: bold;
    line-height: 1;
}

.move-up:hover,
.move-down:hover {
    background: var(--krds-color-light-primary-50, #0066cc);
    color: #fff;
}

.move-up:active,
.move-down:active {
    transform: scale(0.95);
}

.move-up:disabled,
.move-down:disabled {
    opacity: 0.3;
    cursor: not-allowed;
    background: transparent;
}

.move-up:disabled:hover,
.move-down:disabled:hover {
    background: transparent;
    color: var(--krds-color-light-gray-40, #999);
    transform: none;
}

/* 컨트롤 버튼들 */
.column-config-panel>.column-controls {
    margin-top: 16px;
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr;
    gap: 10px;
    padding-top: 16px;
    border-top: 1px solid var(--krds-color-light-gray-80, #2a2a2a);
}

.column-config-panel>.column-controls button {
    height: 32px;
    border-radius: 6px;
    font-weight: 500;
    font-size: 12px;
    transition: all 0.15s ease;
}

.column-config-panel>.column-controls .btn-secondary,
.column-config-panel>.column-controls .btn-primary {
    background: var(--krds-color-light-primary-60, #0052a3);
    border: 1px solid var(--krds-color-light-primary-50, #0066cc);
    color: #fff;
}

.column-config-panel>.column-controls .btn-secondary:hover,
.column-config-panel>.column-controls .btn-primary:hover {
    background: var(--krds-color-light-primary-50, #0066cc);
}

/* 선택된 컬럼 하이라이트 */
/* 드래그 앤 드롭 스타일 (향후 확장용) */
.column-item.dragging {
    opacity: 0.5;
    transform: rotate(2deg);
}

.column-item.drag-over {
    border-top: 2px solid var(--primary-color);
}


/* 스크롤바 스타일 */
.column-list::-webkit-scrollbar {
    width: 6px;
}

.column-list::-webkit-scrollbar-track {
    background: var(--krds-color-light-gray-85, #333);
    border-radius: 3px;
}

.column-list::-webkit-scrollbar-thumb {
    background: var(--krds-color-light-gray-60, #666);
    border-radius: 3px;
}

.column-list::-webkit-scrollbar-thumb:hover {
    background: var(--krds-color-light-gray-50, #888);
}

/* 빈 상태 */
.column-list:empty::before {
    content: "컬럼 정보가 없습니다.";
    display: block;
    text-align: center;
    padding: 32px 20px;
    color: var(--krds-color-light-gray-50, #888);
    font-size: 13px;
}

/* 컬럼 별칭 입력 필드 (Figma Style) */
.column-alias-input {
    background: transparent;
    border: 1px solid transparent;
    color: var(--krds-color-light-gray-20, #e0e0e0);
    font-family: inherit;
    font-size: 13px;
    font-weight: 500;
    padding: 2px 6px;
    border-radius: 4px;
    flex: 1;
    min-width: 0;
    margin-left: 8px;
    transition: all 0.2s ease;
}

.column-alias-input:hover {
    border-color: var(--krds-color-light-gray-60, #666);
    background: rgba(255, 255, 255, 0.05);
}

.column-alias-input:focus {
    background: var(--krds-color-light-gray-90, #1a1a1a);
    border-color: var(--krds-color-light-primary-50, #0066cc);
    outline: none;
    box-shadow: 0 0 0 2px rgba(0, 102, 204, 0.2);
}

.column-alias-input::placeholder {
    color: var(--krds-color-light-gray-50, #666);
    font-style: italic;
}