.column-selector-wrapper {
    position: relative;
    display: inline-block;
}

.column-selector-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border: 2px solid #7c4dff;
    border-radius: 20px;
    background: white;
    color: #7c4dff;
    font-weight: 600;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

.column-selector-btn:hover {
    background: #f3efff;
}

.column-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    z-index: 1000;
    background: white;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.15);
    min-width: 220px;
    max-height: 400px;
    overflow-y: auto;
    padding: 8px 0;
    margin-top: 4px;
}

.column-dropdown-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: background 0.15s;
}

.column-dropdown-item:hover {
    background: #f5f5f5;
}

.column-dropdown-item.disabled {
    opacity: 0.5;
    cursor: default;
}

.column-dropdown-item input[type="checkbox"] {
    accent-color: #7c4dff;
    width: 16px;
    height: 16px;
}

.column-dropdown-divider {
    border-top: 1px solid #e0e0e0;
    margin: 4px 0;
}