/* ============================================
   图片转换器样式
   ============================================ */

/* ============================================
   上传区域
   ============================================ */
.upload-section {
    margin-bottom: var(--spacing-2xl);
}

.upload-card {
    background-color: var(--color-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-xl);
}

.upload-area {
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-base);
    background-color: var(--color-bg-secondary);
}

.upload-area:hover {
    border-color: var(--color-primary);
    background-color: var(--color-primary-light);
}

.upload-area.dragover {
    border-color: var(--color-primary);
    background-color: var(--color-primary-light);
    transform: scale(1.02);
}

.upload-icon {
    margin-bottom: var(--spacing-lg);
}

.upload-icon svg {
    display: block;
    margin: 0 auto;
}

.upload-area h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
}

.upload-area p {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

.upload-hint {
    font-size: 0.875rem;
    color: var(--color-text-tertiary);
    font-style: italic;
}

/* ============================================
   文件信息
   ============================================ */
.file-info {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: var(--color-bg-tertiary);
    border-radius: var(--radius-md);
    margin-top: var(--spacing-lg);
}

.file-details {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex: 1;
    min-width: 0;
}

.file-icon {
    flex-shrink: 0;
}

.file-text {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.file-name {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.file-size {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.8125rem;
}

/* ============================================
   预览区域
   ============================================ */
.preview-area {
    margin-top: var(--spacing-lg);
}

.preview-container {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

@media (max-width: 768px) {
    .preview-container {
        grid-template-columns: 1fr;
    }

    .preview-arrow {
        transform: rotate(90deg);
    }
}

.preview-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.preview-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    text-align: center;
}

.preview-item img {
    width: 100%;
    max-width: 250px;
    max-height: 250px;
    object-fit: contain;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    background-color: var(--color-bg-tertiary);
}

.preview-info {
    font-size: 0.8125rem;
    color: var(--color-text-tertiary);
    text-align: center;
}

.preview-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ============================================
   操作按钮区域
   ============================================ */
.actions-area {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
    justify-content: center;
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1rem;
    font-weight: 600;
}

.actions-area .btn {
    min-width: 180px;
    justify-content: center;
}

/* ============================================
   状态消息
   ============================================ */
.status-message {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    display: none;
    text-align: center;
}

.status-message.show {
    display: block;
    animation: slideDown var(--transition-base);
}

.status-message.success {
    background-color: var(--color-success-bg);
    color: var(--color-success);
    border-left: 4px solid var(--color-success);
}

.status-message.error {
    background-color: var(--color-error-bg);
    color: var(--color-error);
    border-left: 4px solid var(--color-error);
}

.status-message.info {
    background-color: var(--color-info-bg);
    color: var(--color-info);
    border-left: 4px solid var(--color-info);
}

.status-message.warning {
    background-color: var(--color-warning-bg);
    color: var(--color-warning);
    border-left: 4px solid var(--color-warning);
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 768px) {
    .file-info {
        flex-direction: column;
        align-items: stretch;
    }

    .file-details {
        width: 100%;
    }

    .actions-area {
        flex-direction: column;
    }

    .actions-area .btn {
        width: 100%;
        min-width: auto;
    }

    .preview-item img {
        max-width: 200px;
        max-height: 200px;
    }
}