/* --- TRANG CHI TIẾT SẢN PHẨM --- */
.main-image-container {
    background: #000;
    max-height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.main-image-container img {
    height: 100%;
    object-fit: cover;
}

/* Ảnh thumbnail */
.thumb-row img {
    cursor: pointer;
    transition: 0.3s;
    height: 80px;
    width: 100%;
    object-fit: cover;
}

.thumb-row img.active,
.thumb-row img:hover {
    opacity: 1 !important;
    border: 1px solid #f4e1a0;
}

.product-title {
    font-size: 1.8rem;
    font-weight: 700;
    line-height: 1.2;
}

/* Bảng thông số */
.product-specs td {
    padding: 8px 0;
    background: transparent !important;
}

/* Nút bấm vàng lớn */
.btn-gold-lg {
    background: linear-gradient(135deg, #d4af37, #f5e086);
    color: #000;
    border: none;
    border-radius: 4px;
}

.btn-gold-lg:hover {
    filter: brightness(1.1);
    color: #000;
}

.btn-outline-gold {
    border: 2px solid #a0732e;
    color: #f4e1a0;
}

.btn-outline-gold:hover {
    background: #a0732e;
    color: #fff;
}

.tab-btn {
    position: relative;
    padding: 10px 20px;
    font-size: 1.1rem;
}

.tab-btn.active::after {
    content: "";
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 2px;
    background: #f4e1a0;
}