/* Container cho mỗi ảnh preview */
.preview-item {
    position: relative;
    width: 120px;
    height: 80px;
}

.preview-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 4px;
    border: 1px solid #ddd;
}

.btn-remove-img {
    position: absolute;
    top: -8px;
    right: -8px;
    background: #ff4d4d;
    color: white;
    border-radius: 50%;
    width: 22px;
    height: 22px;
    font-size: 14px;
    line-height: 20px;
    text-align: center;
    cursor: pointer;
    border: 2px solid white;
    padding: 0;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.btn-remove-img:hover {
    background: #cc0000;
}