.quantity-discount-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    align-items: stretch;
}

.quantity-button {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    border: 1px solid #ccc;
    padding: 10px;
    border-radius: 10px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    flex-grow: 1;
    width: 10vw;
    font-size: 15px;
    background-color: #ffffff;
    text-align: center;
    gap: 8px;
    align-self: stretch;
    color: inherit;
    text-decoration: none;
}

/* Tier-specific background colors using CSS custom properties */
.quantity-button.qdb-tier-2 {
    background-color: var(--qdb-tier2-bg, #ffffff);
}

.quantity-button.qdb-tier-2:hover {
    background-color: var(--qdb-tier2-hover-bg, #f0f0f0);
}

.quantity-button.qdb-tier-3 {
    background-color: var(--qdb-tier3-bg, #ffffff);
}

.quantity-button.qdb-tier-3:hover {
    background-color: var(--qdb-tier3-hover-bg, #f0f0f0);
}

.quantity-button:hover {
    background-color: var(--qdb-tier2-hover-bg, #f0f0f0);
}

.quantity-button.active {
    background-color: var(--qdb-tier2-hover-bg, #e0e0e0);
    border: 1px solid #000000;
}

.quantity-button .discount {
    display: block;
    width: 100%;
    background-color: var(--qdb-discount-bg, #DA354E);
    color: white;
    border-radius: 2px;
    padding: 2px 5px;
    margin: 0;
    font-size: 14px;
    font-weight: 700;
    box-sizing: border-box;
}

.quantity-button .card-title {
    font-size: var(--qdb-card-title-size, 18px);
    font-weight: var(--qdb-card-title-weight, normal);
    font-style: var(--qdb-card-title-style, normal);
    text-decoration: var(--qdb-card-title-decoration, none);
}

.quantity-button .quantity-text {
    font-size: var(--qdb-qty-text-size, 14px);
    font-weight: var(--qdb-qty-text-weight, normal);
    font-style: var(--qdb-qty-text-style, normal);
    text-decoration: var(--qdb-qty-text-decoration, none);
    line-height: 1.2;
}

.quantity-button .additional-text {
    font-size: var(--qdb-add-text-size, 14px);
    font-weight: var(--qdb-add-text-weight, normal);
    font-style: var(--qdb-add-text-style, normal);
    text-decoration: var(--qdb-add-text-decoration, none);
}

.quantity-button .custom-button-secondary-text {
    font-size: var(--qdb-cta-sec-size, 14px);
    font-weight: var(--qdb-cta-sec-weight, 400);
    color: var(--qdb-cta-sec-color, #444444);
    line-height: 1.3;
}

/* CTA button specific styles */
.quantity-discount-button-cta .card-title {
    font-size: var(--qdb-cta-title-size, 25px);
    font-weight: var(--qdb-cta-title-weight, 700);
    color: var(--qdb-cta-title-color, #222222);
}

.quantity-discount-button-cta .quantity-text {
    font-size: var(--qdb-cta-qty-size, 16px);
    font-weight: var(--qdb-cta-qty-weight, 600);
    color: var(--qdb-cta-qty-color, #222222);
}

.quantity-button .price-text {
    font-size: 15px;
    line-height: 1.4;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.quantity-discount-button.active-selection {
    border-color: #007bff;
    box-shadow: 0 0 5px rgba(0, 123, 255, 0.5);
    background-color: var(--qdb-tier2-hover-bg, #e7f3ff);
    transition: all 0.2s ease;
}

@media (max-width: 768px) {
    .quantity-discount-buttons .quantity-button {
        width: 50vw;
    }
}

/* Base card-title layout (font styles are set via CSS variables in .quantity-button .card-title) */
.card-title {
    width: 100%;
    display: block;
    overflow: hidden;
    text-overflow: unset;
    margin: 0;
}

.quantity-discount-buttons .quantity-button .qdb-regular-price {
    color: #b0b0b0;
    text-decoration: line-through;
    font-weight: 500;
}

.quantity-discount-buttons .qdb-sale-price {
    color: #222;
    font-weight: 700;
    text-decoration: none;
}

/* Auto Add-to-Cart States */

/* Loading state - Gray background with spinner */
.quantity-discount-button.qdb-loading {
    position: relative;
    background-color: #e0e0e0 !important;
    border-color: #e0e0e0 !important;
    color: #666 !important;
    pointer-events: none;
    cursor: wait;
}

/* Hide original content during loading/success/error states */
.quantity-discount-button.qdb-loading .discount,
.quantity-discount-button.qdb-loading .price-text,
.quantity-discount-button.qdb-loading .card-title,
.quantity-discount-button.qdb-loading .quantity-text,
.quantity-discount-button.qdb-loading .additional-text,
.quantity-discount-button.qdb-added .discount,
.quantity-discount-button.qdb-added .price-text,
.quantity-discount-button.qdb-added .card-title,
.quantity-discount-button.qdb-added .quantity-text,
.quantity-discount-button.qdb-added .additional-text,
.quantity-discount-button.qdb-error .discount,
.quantity-discount-button.qdb-error .price-text,
.quantity-discount-button.qdb-error .card-title,
.quantity-discount-button.qdb-error .quantity-text,
.quantity-discount-button.qdb-error .additional-text {
    visibility: hidden;
}

/* Loading/Success/Error text overlay */
.quantity-discount-button .qdb-loading-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 16px;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    white-space: nowrap;
}

/* Spinner (only during loading) */
.quantity-discount-button.qdb-loading .qdb-loading-text::before {
    content: '';
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid transparent;
    border-top-color: #666;
    border-radius: 50%;
    animation: qdb-spin 0.8s linear infinite;
}

@keyframes qdb-spin {
    to { transform: rotate(360deg); }
}

/* Success state - Green background with checkmark */
.quantity-discount-button.qdb-added {
    position: relative;
    background-color: #28a745 !important;
    border-color: #28a745 !important;
    color: white !important;
    pointer-events: none;
}

.quantity-discount-button.qdb-added .qdb-loading-text::before {
    content: none; /* Remove spinner on success */
}

/* Error state - Red background */
.quantity-discount-button.qdb-error {
    position: relative;
    background-color: #dc3545 !important;
    border-color: #dc3545 !important;
    color: white !important;
    pointer-events: none;
}

.quantity-discount-button.qdb-error .qdb-loading-text::before {
    content: none; /* Remove spinner on error */
}

/* Disabled state - Gray overlay while another button is processing */
.quantity-discount-button.qdb-disabled {
    position: relative;
    pointer-events: none;
    cursor: not-allowed;
    opacity: 0.5;
}

.quantity-discount-button.qdb-disabled::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(128, 128, 128, 0.3);
    border-radius: inherit;
    z-index: 10;
}