:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --radius: 8px;
    --radius-lg: 12px;
}

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

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-color);
    min-height: 100vh;
}

#app {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    background: linear-gradient(135deg, #1e3a5f 0%, #2563eb 100%);
    color: white;
    padding: 0;
    box-shadow: var(--shadow-lg);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

header h1 {
    font-size: 1.5rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

nav a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    font-weight: 500;
    transition: all 0.3s;
}

nav a:hover, nav a.active {
    color: white;
    background-color: rgba(255, 255, 255, 0.15);
}

.user-menu {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding-left: 1rem;
    border-left: 1px solid rgba(255, 255, 255, 0.2);
}

main {
    flex: 1;
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
    padding: 2rem;
}

section.page {
    display: none;
    animation: fadeIn 0.3s ease;
}

section.page.active {
    display: block;
}

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

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.page-header h2 {
    font-size: 1.75rem;
    color: var(--text-primary);
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.auth-container {
    max-width: 420px;
    margin: 3rem auto;
    background: var(--card-bg);
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.auth-logo {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-logo h2 {
    font-size: 1.75rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.auth-logo p {
    color: var(--text-secondary);
}

.auth-tabs {
    display: flex;
    margin-bottom: 1.5rem;
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--bg-color);
}

.tab-btn {
    flex: 1;
    padding: 0.75rem;
    border: none;
    background: transparent;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s;
}

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

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.btn-primary {
    width: 100%;
    padding: 0.875rem 1.5rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s;
}

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

.btn-secondary {
    padding: 0.5rem 1rem;
    background: var(--secondary-color);
    color: white;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: background 0.3s;
    text-decoration: none;
    font-size: 0.9rem;
}

.btn-secondary:hover {
    background: #475569;
}

.btn-small {
    padding: 0.375rem 0.75rem;
    font-size: 0.875rem;
}

.auth-notice {
    margin-top: 1.5rem;
    padding: 1rem;
    background: #f0f9ff;
    border-radius: var(--radius);
    border-left: 3px solid var(--primary-color);
}

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

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: transform 0.3s, box-shadow 0.3s;
}

.stat-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.stat-icon {
    font-size: 2.5rem;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #e0f2fe 0%, #bae6fd 100%);
    border-radius: var(--radius);
}

.stat-content h3 {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
    font-weight: 500;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-text {
    font-size: 1rem;
    color: var(--text-secondary);
}

.chart-section {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
}

.chart-section h3 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.chart-container {
    height: 300px;
    position: relative;
}

.quick-actions {
    text-align: center;
}

.reports-grid,
.family-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.report-card,
.family-card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
    cursor: pointer;
    position: relative;
}

.report-card:hover,
.family-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.report-card h3,
.family-card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.report-card p,
.family-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0.375rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.report-card .category-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: #e0f2fe;
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
}

.family-card .relation-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: #f0fdf4;
    color: var(--success-color);
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
}

.search-filter {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    background: var(--card-bg);
    padding: 1rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.search-box {
    display: flex;
    flex: 1;
    min-width: 250px;
    gap: 0.5rem;
}

.search-box input {
    flex: 1;
    padding: 0.625rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
}

.search-box button {
    padding: 0.625rem 1rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
}

.search-filter select {
    padding: 0.625rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    min-width: 150px;
    cursor: pointer;
}

.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
}

.settings-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 1.5rem;
}

.settings-card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.settings-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.settings-header h3 {
    font-size: 1.1rem;
    color: var(--text-primary);
}

.badge {
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
}

.badge-info {
    background: #e0f2fe;
    color: var(--primary-color);
}

.badge-warning {
    background: #fef3c7;
    color: var(--warning-color);
}

.settings-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.api-guide {
    margin: 1rem 0;
    padding: 0.75rem;
    background: var(--bg-color);
    border-radius: var(--radius);
}

.api-guide summary {
    cursor: pointer;
    font-weight: 500;
    color: var(--primary-color);
}

.guide-content {
    margin-top: 0.75rem;
    padding: 0.75rem;
    font-size: 0.875rem;
}

.guide-content h4 {
    margin: 0.5rem 0;
    color: var(--text-primary);
}

.guide-content ol {
    padding-left: 1.25rem;
    color: var(--text-secondary);
}

.guide-content a {
    color: var(--primary-color);
}

.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 500px;
    position: relative;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-large {
    max-width: 800px;
}

.close {
    position: absolute;
    right: 1.25rem;
    top: 1rem;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
    line-height: 1;
}

.close:hover {
    color: var(--text-primary);
}

.modal h3 {
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.file-upload {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius);
    padding: 1.5rem;
    text-align: center;
    transition: border-color 0.3s;
}

.file-upload:hover {
    border-color: var(--primary-color);
}

.file-upload input[type="file"] {
    width: 100%;
}

.file-preview {
    margin-top: 1rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.file-preview-item {
    position: relative;
    width: 80px;
    height: 80px;
    border-radius: var(--radius);
    overflow: hidden;
}

.file-preview-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.ocr-option {
    display: flex;
    align-items: center;
}

.ocr-option label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.upload-progress {
    margin: 1rem 0;
    text-align: center;
}

.progress-bar {
    height: 8px;
    background: var(--bg-color);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--success-color));
    width: 0%;
    transition: width 0.3s;
}

#progress-text {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.detail-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.detail-info p {
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.detail-info strong {
    color: var(--text-primary);
    margin-right: 0.5rem;
}

.detail-image {
    margin-bottom: 1.5rem;
    text-align: center;
    background: var(--bg-color);
    border-radius: var(--radius);
    padding: 1rem;
}

.detail-image img {
    max-width: 100%;
    max-height: 400px;
    border-radius: var(--radius);
}

.detail-ocr h4 {
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.detail-ocr pre {
    background: var(--bg-color);
    padding: 1rem;
    border-radius: var(--radius);
    overflow-x: auto;
    font-size: 0.875rem;
    max-height: 300px;
    overflow-y: auto;
}

footer {
    background: #1e293b;
    color: rgba(255, 255, 255, 0.7);
    text-align: center;
    padding: 1.5rem;
    margin-top: auto;
}

footer p {
    font-size: 0.875rem;
}

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        text-align: center;
    }
    
    nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    main {
        padding: 1rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .settings-container {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .search-filter {
        flex-direction: column;
    }
    
    .search-box {
        width: 100%;
    }
}