/* ===== FREE PRODUCT STYLES ===== */
:root {
    --free-primary: #ff6b35;
    --free-secondary: #f7931e;
    --free-accent: #ffd700;
    --free-glow: rgba(255, 107, 53, 0.4);
}
/* Card container cho sản phẩm miễn phí */
.free-product-card {
    position: relative;
    transform: scale(1.02);
    box-shadow: 0 8px 25px var(--free-glow) !important;
    border: 2px solid var(--free-accent);
    background: linear-gradient(145deg, #fff 0%, #fffef7 100%);
    animation: freeProductPulse 3s ease-in-out infinite;
}

    .free-product-card:hover {
        transform: scale(1.05);
        box-shadow: 0 12px 35px var(--free-glow) !important;
    }
/* Badge miễn phí */
.free-product-badge {
    position: absolute;
    top: -5px;
    right: -5px;
    z-index: 10;
    background: linear-gradient(135deg, var(--free-primary) 0%, var(--free-secondary) 100%);
    color: white;
    border-radius: 20px;
    padding: 8px 12px;
    font-weight: bold;
    font-size: 0.75rem;
    box-shadow: 0 4px 12px rgba(255, 107, 53, 0.5);
    animation: freeBadgeBounce 2s ease-in-out infinite;
}

.badge-content {
    display: flex;
    align-items: center;
    gap: 4px;
}
/* Overlay trên ảnh */
.free-product-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(255, 107, 53, 0.9), rgba(247, 147, 30, 0.9));
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 5;
}

.free-product-card:hover .free-product-overlay {
    opacity: 1;
}

.free-text {
    color: white;
    font-weight: bold;
    text-align: center;
    font-size: 0.9rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

    .free-text i {
        display: block;
        font-size: 1.5rem;
        margin-bottom: 5px;
    }
/* Phần giá miễn phí */
.free-price-container {
    text-align: center;
    margin: 10px 0;
}

.free-price {
    margin: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
}

.free-text-large {
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--free-primary);
    text-shadow: 0 1px 2px rgba(255, 107, 53, 0.3);
}

.original-price-crossed {
    font-size: 0.85rem;
    color: #999;
    text-decoration: line-through;
}

.limited-offer {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
    font-size: 0.75rem;
    color: var(--free-secondary);
    font-weight: 600;
    margin-top: 5px;
}
/* Button cho sản phẩm miễn phí */
.btn-free-product {
    background: linear-gradient(135deg, var(--free-primary) 0%, var(--free-secondary) 100%);
    color: white;
    border: none;
    font-weight: bold;
    box-shadow: 0 4px 12px rgba(255, 107, 53, 0.3);
    transition: all 0.3s ease;
}

    .btn-free-product:hover {
        background: linear-gradient(135deg, var(--free-secondary) 0%, var(--free-primary) 100%);
        color: white;
        transform: translateY(-2px);
        box-shadow: 0 6px 16px rgba(255, 107, 53, 0.4);
    }
/* Animations */
@keyframes freeProductPulse {
    0%, 100% {
        box-shadow: 0 8px 25px var(--free-glow);
    }

    50% {
        box-shadow: 0 12px 35px rgba(255, 107, 53, 0.6);
    }
}

@keyframes freeBadgeBounce {
    0%, 100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-3px);
    }
}