.loading-spinner {
    border: 4px solid rgba(0, 0, 0, 0.1);
    border-top: 4px solid #3498db;
    border-radius: 50%;
    width: 16px;
    height: 16px;
    animation: spin 1s linear infinite;
    display: inline-block;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}


/* Styles for stock notes */
#stock_notes_container {
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
}

#stock_notes_field {
    width: 100%;
    box-sizing: border-box;
}

.product-modal {
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgb(0,0,0);
    background-color: rgba(0,0,0,0.4);
}
.product-modal-content {
    background-color: #fefefe;
    margin: 15% auto;
    padding: 20px;
    border: 1px solid #888;
    width: 40%;
}
.close-modal {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
}
.close-modal:hover,
.close-modal:focus {
    color: black;
    text-decoration: none;
    cursor: pointer;
}