.kit-columns {
    width: 100%;
    margin: 2rem 0;
    padding: 1.25rem;
    border: 1px solid #e9e9e9;
    border-radius: .5rem;
    background: #fff;
}

.kit-columns__list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr));
    gap: 1rem;
}

.kit-column {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: .5rem;
}

.kit-column__selected {
    min-height: 4rem;
    color: #999;
}

.kit-column__selected .kit-column__item {
    cursor: default;
}

.kit-column__actions {
    display: flex;
    gap: .75rem;
}

.kit-column__replace,
.kit-column__clear {
    padding: .25rem 0;
    border: 0;
    background: none;
    color: #b00000;
    font-size: .75rem;
    cursor: pointer;
    text-decoration: underline;
}

.kit-column__popup {
    position: absolute;
    z-index: 10;
    top: 0;
    left: 0;
    width: min(24rem, 90vw);
    max-height: 28rem;
    overflow-y: auto;
    padding: .75rem;
    border: 1px solid #ddd;
    border-radius: .5rem;
    background: #fff;
    box-shadow: 0 8px 24px rgba(0,0,0,.18);
}

.kit-column__popup[hidden] {
    display: none !important;
}

.kit-column__popup-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: .5rem;
}

.kit-column__popup-close {
    border: 0;
    background: none;
    font-size: 1.25rem;
    cursor: pointer;
}

.kit-column h3 {
    margin-bottom: .25rem;
    font-size: 1rem;
}

.kit-column__item {
    display: grid;
    grid-template-columns: auto 3.5rem 1fr;
    align-items: center;
    gap: .5rem;
    min-height: 4rem;
    padding: .5rem;
    border: 1px solid #e9e9e9;
    border-radius: .375rem;
    cursor: pointer;
}

.kit-column__item[hidden] {
    display: none !important;
}

.kit-column__item:hover,
.kit-column__item:has(input:checked) {
    border-color: #b00000;
}

.kit-column__item--unavailable {
    opacity: .5;
    cursor: not-allowed;
}

.kit-column__item--duplicate {
    opacity: .35;
    filter: grayscale(1);
    cursor: not-allowed;
}

.kit-column__item--duplicate input {
    cursor: not-allowed;
}

.kit-column__clear {
    align-self: flex-start;
    padding: .25rem 0;
    border: 0;
    background: none;
    color: #999;
    font-size: .75rem;
    cursor: pointer;
    text-decoration: underline;
}

.kit-column--disabled {
    opacity: .45;
}

.kit-column__clear:disabled {
    cursor: not-allowed;
    text-decoration: none;
}

.kit-column__item img {
    width: 3.5rem;
    height: 3.5rem;
    object-fit: contain;
}

.kit-column__item span {
    font-size: .875rem;
}

.kit-column__prices {
    display: flex;
    gap: .35rem;
    margin-top: .25rem;
    font-size: .8125rem;
}

.kit-column__prices del {
    color: #999;
}

.kit-column__prices b {
    color: #151515;
}

.kit-column__item strong {
    color: #b00000;
    font-size: .75rem;
    white-space: nowrap;
}

.kit-columns__buy {
    margin-top: 1rem;
    padding: .75rem 1.5rem;
    border: 0;
    border-radius: .375rem;
    background: #b00000;
    color: #fff;
}

.kit-columns__buy:disabled {
    background: #bdbdbd;
}

@media (max-width: 640px) {
    .kit-columns {
        padding: 1rem .75rem;
    }

    .kit-columns__list {
        grid-template-columns: 1fr;
    }
}

.kit-columns-checkout {
    width: 100%;
    margin: .75rem 0;
    padding: .75rem;
    border: 1px solid #e9e9e9;
    border-radius: .5rem;
}

.kit-columns-checkout__title {
    margin-bottom: .5rem;
    color: #b00000;
    font-weight: 600;
}