.file-upload-area {
    transition: all 0.3s;
    position: relative;
}


/* hover 提示信息样式 */
.file-tooltip {
    text-align: left;
    display: none;
    position: absolute;
    bottom: calc(100% + 10px);
    left: 0;
    background: #333;
    color: #fff;
    padding: 10px 14px;
    border-radius: 8px;
    white-space: nowrap;
    z-index: 10;
    opacity: 0;
    transition: opacity 0.2s ease;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

.file-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 16px;
    border: 6px solid transparent;
    border-top-color: #333;
}

.file-tooltip-title {
    display: block;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 4px;
    color: #fff;
}

.file-tooltip-description {
    display: block;
    font-size: 12px;
    color: #bbb;
}

.file-upload-area:hover .file-tooltip {
    display: block;
    opacity: 1;
}

.file-upload-area.highlight {
    border-color: #1890ff;
    background-color: #e6f7ff;
}

.file-list-chat {
    margin-top: 10px;
    flex-direction: row-reverse;
    flex-wrap: wrap;
    gap: 8px;
    width: calc(100% - 15px);
    max-height: 180px;
    display: flex;
    overflow-y: auto;
}

.file-list {
    flex-wrap: wrap;
    gap: 8px;
    width: calc(100% - 48px);
    max-height: 180px;
    display: flex;
    overflow-y: auto;
}

.file-item:hover {
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.file-item:hover .file-close {
    display: block;
    opacity: 1;
}

.file-close {
    display: none;
    position: absolute;
    top: 8px;
    right: 0;
}
.file-item {
    position: relative;
    align-items: center;
    display: flex;
    height: 68px;
    border-radius: 8px;
    background: #F3F3F5;
    padding: 14px;
    transition: box-shadow .2s ease-in-out;
}

/* Image thumbnail card variant */
.file-item-image {
    position: relative;
    width: 80px;
    height: 80px;
    border-radius: 8px;
    overflow: hidden;
    background: #F3F3F5;
    flex-shrink: 0;
    transition: box-shadow .2s ease-in-out;
}

.file-item-image:hover {
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
}

.file-item-image:hover .file-close {
    display: flex;
    opacity: 1;
}

.file-item-image .file-close {
    display: none;
    position: absolute;
    top: 4px;
    right: 4px;
    width: 20px;
    height: 20px;
    background: rgba(0, 0, 0, 0.45);
    border-radius: 50%;
    align-items: center;
    justify-content: center;
    z-index: 2;
}

.file-item-image .file-close img {
    width: 12px;
    height: 12px;
    filter: brightness(10);
}

.file-thumb {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.file-item-image .file-name {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 2px 6px;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.5));
    color: #fff;
    font-size: 11px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.file-info {
    display: block;
    margin-left: 8px;
    margin-right: 20px;
}

.file-name {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: #000000;
}

.file-size {
    color: #E0E0E0;
}

.file-progress {
    width: 100%;
    height: 5px;
    background-color: #f0f0f0;
    margin-top: 5px;
    border-radius: 3px;
    overflow: hidden;
}

.file-progress-bar {
    height: 100%;
    background-color: #52c41a;
    width: 0%;
    transition: width 0.3s;
}

.upload-status {
    margin-top: 10px;
    padding: 10px;
    border-radius: 4px;
}

.status-success {
    background-color: #f6ffed;
    border: 1px solid #b7eb8f;
    color: #52c41a;
}

.status-error {
    background-color: #fff2f0;
    border: 1px solid #ffccc7;
    color: #f5222d;
}

/* Image thumbnail in chat bubble */
.file-item-image-chat {
    width: 80px;
    height: 80px;
    border-radius: 8px;
    overflow: hidden;
    flex-shrink: 0;
}

.file-item-image-chat .file-thumb {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    border-radius: 8px;
}