.nxk {
    position: relative;
    display: inline-block;
    width: 100%;
}

.nxk-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 10px 14px;
    background: #fff;
    border: 1px solid #dee6ed;
    border-radius: 10px;
    font-size: 0.95rem;
    color: #33475b;
    cursor: pointer;
    list-style: none;
    white-space: nowrap;
}

.nxk-toggle::-webkit-details-marker {
    display: none;
}

.nxk-caret {
    font-size: 0.75rem;
    color: #7a8ba0;
    transition: transform 0.15s ease;
}

.nxk[open] .nxk-caret {
    transform: rotate(180deg);
}

.nxk-panel {
    position: absolute;
    z-index: 30;
    top: calc(100% + 6px);
    left: 0;
    right: 0;
    max-height: 260px;
    overflow-y: auto;
    padding: 6px;
    background: #fff;
    border: 1px solid #dee6ed;
    border-radius: 10px;
    box-shadow: 0 8px 24px rgba(20, 40, 70, 0.12);
}

.nxk-option {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 10px;
    margin: 0;
    border-radius: 8px;
    font-size: 0.9rem;
    color: #33475b;
    cursor: pointer;
}

.nxk-option:hover {
    background: #f2f6fa;
}

.nxk-option input {
    width: 16px;
    height: 16px;
    margin: 0;
    flex: 0 0 auto;
}

.nxk-empty {
    margin: 0;
    padding: 10px;
    color: #7a8ba0;
    font-size: 0.85rem;
}