/* PDF提取器样式 - 优化版 */
:root {
    --primary-color: #4a90e2;
    --primary-dark: #3a7bc8;
    --success-color: #27ae60;
    --success-dark: #219653;
    --warning-color: #f39c12;
    --danger-color: #e74c3c;
    --light-color: #f4f7f9;
    --dark-color: #333;
    --gray-light: #ecf0f1;
    --gray-medium: #bdc3c7;
    --gray-dark: #7f8c8d;
    --white: #fff;
    --shadow-light: 0 2px 10px rgba(0, 0, 0, 0.05);
    --shadow-medium: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-heavy: 0 8px 24px rgba(0, 0, 0, 0.15);
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --border-radius-xs: 6px;
    --transition: all 0.2s ease;
    --font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    background: var(--light-color);
    color: var(--dark-color);
    line-height: 1.6;
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

/* 头部区域 */
.header {
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-light);
    padding: 24px;
    margin-bottom: 24px;
    position: sticky;
    top: 20px;
    z-index: 100;
    border: 1px solid var(--gray-light);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 20px;
    flex: 1;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* 标题样式 */
.app-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    margin: 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.app-title::before {
    content: "📄";
    font-size: 28px;
}

.app-subtitle {
    font-size: 14px;
    color: var(--gray-dark);
    margin-top: 4px;
}

/* 按钮样式 */
.btn {
    padding: 12px 24px;
    border-radius: var(--border-radius-xs);
    border: none;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    text-decoration: none;
    user-select: none;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--white);
}

.btn-primary:hover:not(:disabled) {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.btn-success {
    background: var(--success-color);
    color: var(--white);
}

.btn-success:hover:not(:disabled) {
    background: var(--success-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.btn:disabled {
    background: var(--gray-medium);
    cursor: not-allowed;
    opacity: 0.7;
    transform: none !important;
    box-shadow: none !important;
}

.btn-icon {
    font-size: 16px;
}

/* 文件上传区域 */
.upload-area {
    position: relative;
}

.file-input {
    position: absolute;
    width: 0;
    height: 0;
    opacity: 0;
}

.upload-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

/* 状态显示 */
.status-container {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--gray-light);
    border-radius: var(--border-radius-sm);
    min-width: 200px;
}

.status-icon {
    font-size: 18px;
}

#status {
    font-size: 14px;
    color: var(--dark-color);
    font-weight: 500;
}

.status-success {
    color: var(--success-color);
}

.status-error {
    color: var(--danger-color);
}

.status-processing {
    color: var(--warning-color);
}

/* 统计信息 */
.stats-container {
    display: flex;
    gap: 16px;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--gray-light);
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 8px 12px;
    background: var(--gray-light);
    border-radius: var(--border-radius-sm);
    min-width: 100px;
}

.stat-value {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    font-size: 12px;
    color: var(--gray-dark);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* 图片网格 */
.image-section {
    margin-top: 24px;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.section-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--dark-color);
}

.image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 20px;
    max-height: calc(100vh - 300px);
    overflow-y: auto;
    padding: 4px;
}

/* 自定义滚动条样式 */
.image-grid::-webkit-scrollbar {
    width: 8px;
}

.image-grid::-webkit-scrollbar-track {
    background: var(--gray-light);
    border-radius: 4px;
}

.image-grid::-webkit-scrollbar-thumb {
    background: var(--gray-medium);
    border-radius: 4px;
}

.image-grid::-webkit-scrollbar-thumb:hover {
    background: var(--gray-dark);
}

.image-item {
    background: var(--white);
    border-radius: var(--border-radius-sm);
    overflow: hidden;
    box-shadow: var(--shadow-light);
    transition: var(--transition);
    border: 1px solid var(--gray-light);
}

/* Vue transition-group 包裹的容器 */
.image-grid-wrapper {
    display: contents;
}

.image-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-medium);
}

.image-container {
    position: relative;
    width: 100%;
    height: 180px;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.image-container img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: 8px;
}

.image-info {
    padding: 12px;
    border-top: 1px solid var(--gray-light);
}

.image-name {
    font-size: 13px;
    font-weight: 600;
    color: var(--dark-color);
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.image-meta {
    display: flex;
    justify-content: space-between;
    font-size: 11px;
    color: var(--gray-dark);
}

.image-page {
    background: var(--primary-color);
    color: var(--white);
    padding: 2px 6px;
    border-radius: 10px;
    font-size: 10px;
}

/* 空状态 */
.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 20px;
    color: var(--gray-dark);
}

.empty-icon {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-title {
    font-size: 18px;
    margin-bottom: 8px;
    color: var(--dark-color);
}

.empty-description {
    font-size: 14px;
    max-width: 400px;
    margin: 0 auto;
}

/* 加载状态 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--gray-light);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* 进度条 */
.progress-container {
    width: 100%;
    height: 6px;
    background: var(--gray-light);
    border-radius: 3px;
    overflow: hidden;
    margin-top: 8px;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--success-color));
    border-radius: 3px;
    transition: width 0.3s ease;
}

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

    .header-left, .header-right {
        width: 100%;
        justify-content: center;
    }

    .stats-container {
        flex-wrap: wrap;
        justify-content: center;
    }

    .image-grid {
        grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    }

    .container {
        padding: 0 10px;
    }
}

@media (max-width: 480px) {
    .image-grid {
        grid-template-columns: 1fr;
    }

    .btn {
        padding: 10px 16px;
        font-size: 13px;
    }

    .app-title {
        font-size: 20px;
    }
}

/* 工具提示 */
.tooltip {
    position: relative;
    display: inline-block;
}

.tooltip .tooltip-text {
    visibility: hidden;
    width: 200px;
    background-color: var(--dark-color);
    color: var(--white);
    text-align: center;
    padding: 8px;
    border-radius: var(--border-radius-xs);
    position: absolute;
    z-index: 1;
    bottom: 125%;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0;
    transition: opacity 0.3s;
    font-size: 12px;
    font-weight: normal;
}

.tooltip:hover .tooltip-text {
    visibility: visible;
    opacity: 1;
}

/* 淡入动画（通用） */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.3s ease-out;
}

/* 图片加载动画 */
.image-loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40px;
    height: 40px;
    border: 3px solid var(--gray-light);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Vue transition 动画 */
.fade-enter-active,
.fade-leave-active {
    transition: opacity 0.3s ease;
}

.fade-enter-from,
.fade-leave-to {
    opacity: 0;
}

/* slide-up 动画 */
.slide-up-enter-active,
.slide-up-leave-active {
    transition: all 0.3s ease;
}

.slide-up-enter-from,
.slide-up-leave-to {
    opacity: 0;
    transform: translateY(20px);
}