/* --- 1. Wrapper Chung (Nền xám nhẹ để làm nổi bật thẻ sản phẩm) --- */
.product-detail {
    padding:20px;
}
.product-page {
    background-color: #f8f9fa; /* Màu nền tổng thể sáng sủa */
    padding: 40px 0 60px;
    font-family: 'Segoe UI', sans-serif;
}

/* Nút quay lại */
.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: #666;
    text-decoration: none;
    font-weight: 500;
    margin-bottom: 20px;
    transition: color 0.2s;
}
.back-btn:hover { color: #009f7f; }

/* --- 2. Container chính (Khối trắng nổi bật) --- */
.product-container {
    background-color: #fff;
    border-radius: 16px; /* Bo góc lớn hiện đại */
    box-shadow: 0 5px 20px rgba(0,0,0,0.05); /* Đổ bóng nhẹ tạo chiều sâu */
    padding: 30px;
    overflow: hidden;
}

/* --- 3. Gallery (Ảnh) --- */
.gallery__main {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    background-color: #f4f4f4;
    margin-bottom: 15px;
    cursor: crosshair; /* Hiệu ứng chuột soi ảnh */
}

.gallery__img {
    width: 100%;
    display: block;
    transition: transform 0.5s ease;
}

.gallery__main:hover .gallery__img {
    transform: scale(1.05); /* Zoom nhẹ khi hover */
}

.gallery__badges {
    position: absolute;
    top: 15px;
    left: 15px;
    display: flex;
    gap: 8px;
}

.badge {
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
    color: #fff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}
.badge--new { background: #00c030; }
.badge--sale { background: #ff424f; }

/* Thumbnails */
.gallery__thumbs {
    display: flex;
    gap: 12px;
    justify-content: center;
}

.gallery__thumb {
    width: 70px;
    height: 70px;
    border-radius: 10px;
    overflow: hidden;
    border: 2px solid transparent;
    cursor: pointer;
    opacity: 0.7;
    transition: all 0.2s;
}

.gallery__thumb img { width: 100%; height: 100%; object-fit: cover; }

.gallery__thumb:hover { opacity: 1; }
.gallery__thumb--active {
    border-color: #009f7f;
    opacity: 1;
}

/* --- 4. Thông tin (Info) --- */
.info { padding-left: 20px; }

.info__cate {
    color: #888;
    font-size: 13px;
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.info__title {
    font-size: 32px;
    font-weight: 700;
    color: #1a1a1a;
    margin: 0 0 15px;
    line-height: 1.2;
}

.info__meta {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
    font-size: 14px;
}

.rating { color: #ffc107; }
.rating span { color: #666; margin-left: 5px; }
.meta-divider { color: #ddd; }
.status { color: #009f7f; font-weight: 600; }

/* Giá tiền (Thiết kế hộp giá) */
.price-box {
    background: #f0fffa; /* Nền xanh nhạt cực nhẹ */
    padding: 20px;
    border-radius: 12px;
    border: 1px dashed #009f7f;
    margin-bottom: 25px;
}

.price-box__main {
    display: flex;
    align-items: baseline;
    gap: 15px;
    margin-bottom: 5px;
}

.current-price {
    font-size: 28px;
    font-weight: 800;
    color: #009f7f;
}

.old-price {
    font-size: 16px;
    color: #999;
    text-decoration: line-through;
}

.price-box__save {
    font-size: 13px;
    color: #007a62;
    font-weight: 500;
}

.info__desc {
    color: #555;
    line-height: 1.6;
    margin-bottom: 30px;
}

/* --- 5. Hành động (Nút mua) --- */
.actions {
    display: flex;
    gap: 15px;
    margin-bottom: 30px;
    height: 50px;
}

/* Bộ chọn số lượng */
.quantity {
    display: flex;
    border: 1px solid #ddd;
    border-radius: 8px;
    overflow: hidden;
}

.qty-btn {
    width: 40px;
    background: #fff;
    border: none;
    cursor: pointer;
    font-size: 14px;
    color: #555;
    transition: background 0.2s;
}
.qty-btn:hover { background: #f5f5f5; }

.qty-input {
    width: 50px;
    border: none;
    text-align: center;
    font-weight: 600;
    font-size: 16px;
    outline: none;
    color: #333;
}

/* Nút Thêm vào giỏ */
.btn-buy {
    flex-grow: 1;
    background-color: #009f7f;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    box-shadow: 0 4px 12px rgba(0, 159, 127, 0.3); /* Đổ bóng màu xanh */
    transition: all 0.2s;
}

.btn-buy:hover {
    background-color: #008066;
    transform: translateY(-2px); /* Nổi lên khi hover */
    box-shadow: 0 6px 15px rgba(0, 159, 127, 0.4);
}

/* Nút Tim */
.btn-heart {
    width: 50px;
    border: 1px solid #ddd;
    background: #fff;
    border-radius: 8px;
    color: #666;
    font-size: 20px;
    cursor: pointer;
    transition: all 0.2s;
}
.btn-heart:hover {
    border-color: #ff424f;
    color: #ff424f;
    background: #fff0f1;
}

.divider {
    height: 1px;
    background-color: #eee;
    margin: 0 0 30px;
}

/* --- 6. Chính sách (Layout thẻ) --- */
.policies {
    display: grid;
    grid-template-columns: repeat(3, 1fr); /* Chia 3 cột đều nhau */
    gap: 15px;
}

.policy-card {
    border: 1px solid #f0f0f0;
    border-radius: 10px;
    padding: 15px;
    text-align: center;
    transition: transform 0.2s;
    background: #fafafa;
}

.policy-card:hover {
    transform: translateY(-3px);
    border-color: #009f7f;
    background: #fff;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

.policy-card__icon {
    font-size: 24px;
    color: #009f7f;
    margin-bottom: 10px;
}

.policy-card__text h4 {
    margin: 0 0 4px;
    font-size: 13px;
    font-weight: 700;
    color: #333;
}

.policy-card__text p {
    margin: 0;
    font-size: 11px;
    color: #777;
}

/* Responsive Mobile */
@media (max-width: 739px) {
    .product-container { padding: 20px; }
    .info { padding-left: 0; margin-top: 20px; }
    .policies { grid-template-columns: 1fr; } /* Mobile chính sách xếp dọc */
    .actions { flex-wrap: wrap; height: auto; }
    .btn-buy { width: 100%; padding: 12px; order: -1; } /* Nút mua lên đầu */
    .quantity { width: 100%; height: 40px; margin-bottom: 10px;}
    .btn-heart { width: 100%; height: 40px;}
}