.po-product-options-grid {
    display: grid;
    gap: 1em;
    grid-template-columns: repeat(3, 1fr);
}
@media (max-width: 992px) {
    .po-product-options-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}
@media (max-width: 600px) {
    .po-product-options-grid {
        grid-template-columns: 1fr;
    }
    #po-product-options-wrapper {
        padding: 1em;
    }
}
.po-product-card {
    position: relative;
    background-color: #fff;
}
.po-product-selection {
    opacity: 0; position: absolute; width: 1px; height: 1px;
}
.po-product-label {
    display: flex;
    flex-direction: column;
    padding: 15px;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    cursor: pointer;
    height: 100%;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.po-product-label:hover {
    border-color: #b0b0b0;
}
.po-product-selection:checked + .po-product-label {
    border: 2px solid #28a745;
    padding: 14px;
    box-shadow: 0 4px 12px rgba(40, 167, 69, 0.15);
}
.po-product-main-info {
    display: flex;
    align-items: center;
    gap: 15px;
    flex-grow: 1;
}
.po-product-image {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
}
.po-product-image img {
    width: 100%; height: 100%; object-fit: contain; border-radius: 4px;
}
.po-product-details {
    flex-grow: 1;
}
.po-product-title {
    margin: 0 0 5px 0;
    font-size: 1em;
    font-weight: 500;
    line-height: 1.3;
    color: #333;
}
.po-product-price {
    font-size: 1.1em;
    font-weight: 500;
}
.po-product-price del {
    font-size: 0.8em;
    color: #999;
    margin-right: 8px;
    opacity: 0.9;
}
.po-product-price ins {
    color: #555;
    font-weight: bold;
    text-decoration: none;
}
.po-product-custom-options {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid #f0f0f0;
}
.po-custom-field-group {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 8px;
}
.po-custom-field-title {
    font-weight: 500;
    font-size: 0.9em;
    color: #444;
    flex-shrink: 0;
}
.po-swatch-list {
    display: flex; flex-wrap: wrap; gap: 6px;
}
.po-custom-radio-option {
    opacity: 0; position: absolute; width: 1px; height: 1px;
}
.po-swatch-label {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    border: 1px solid #ccc;
    background-color: #fff;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.85em;
    color: #333;
    line-height: 1.4;
}
.po-swatch-label:hover {
    background-color: #f5f5f5;
    border-color: #999;
}
.po-option-price {
    font-weight: 500;
    color: #777;
}
.po-custom-radio-option:checked + .po-swatch-label {
    background-color: #e4f3e8;
    border-color: #28a745;
    color: #155724;
    font-weight: 500;
}
.po-product-label {
    position: relative;
}
.po-selected-checkmark {
    position: absolute;
    top: -10px;
    left: -10px;
    z-index: 2;
    width: 24px;
    height: 24px;
    background-color: #28a745; 
    border-radius: 50%; 
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    opacity: 0;
    transform: scale(0.5);
    transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
.po-selected-checkmark::after {
    content: '';
    position: absolute;
    left: 8px;
    top: 4px;
    width: 6px;
    height: 12px;
    border: solid white;
    border-width: 0 3px 3px 0;
    transform: rotate(45deg);
}
.po-product-selection:checked + .po-product-label .po-selected-checkmark {
    opacity: 1;
    transform: scale(1);
}