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

:root {
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --secondary-color: #6b7280;
    --success-color: #10b981;
    --error-color: #ef4444;
    --highlight-color: #fbbf24;
    --bg-color: #f9fafb;
    --card-bg: #ffffff;
    --border-color: #e5e7eb;
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

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

.container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    padding: 40px 20px;
}

header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

main {
    margin-top: 20px;
}

/* Upload Section */
.upload-section {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 30px;
    box-shadow: var(--shadow);
    margin-bottom: 30px;
}

/* Tabs */
.upload-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    border-bottom: 2px solid var(--border-color);
}

.tab-btn {
    background: none;
    border: none;
    padding: 12px 24px;
    font-size: 1rem;
    color: var(--text-secondary);
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: all 0.3s;
    font-weight: 500;
}

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

.tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Upload Area */
.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 60px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    background: var(--bg-color);
}

.upload-area:hover {
    border-color: var(--primary-color);
    background: #f0f0ff;
}

.upload-area.dragover {
    border-color: var(--primary-color);
    background: #e0e7ff;
}

.upload-icon {
    width: 64px;
    height: 64px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.upload-text {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: 8px;
}

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

/* Input Groups */
.input-group {
    margin-top: 20px;
}

.input-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.input-group input[type="url"],
.input-group input[type="text"],
.input-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s;
}

.input-group input:focus,
.input-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

/* Buttons */
.btn-primary,
.btn-secondary,
.btn-clear,
.btn-icon {
    padding: 12px 24px;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    width: 100%;
    margin-top: 20px;
}

.btn-primary:hover:not(:disabled) {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.btn-primary:disabled {
    background: var(--secondary-color);
    cursor: not-allowed;
    opacity: 0.6;
}

.btn-secondary {
    background: var(--bg-color);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--border-color);
}

.btn-icon {
    padding: 8px 12px;
    background: var(--bg-color);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    font-weight: 600;
}

.btn-icon:hover:not(:disabled) {
    background: var(--border-color);
}

.btn-icon:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

.btn-clear {
    background: var(--error-color);
    color: white;
    padding: 8px 16px;
    font-size: 0.9rem;
}

.btn-clear:hover {
    background: #dc2626;
}

/* Loading Spinner */
.spinner {
    display: inline-block;
    width: 14px;
    height: 14px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* File Preview */
.file-preview {
    margin-top: 20px;
    padding: 15px;
    background: var(--bg-color);
    border-radius: 6px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.preview-info {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.file-name {
    font-weight: 500;
    color: var(--text-primary);
}

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

/* Results Section */
.results-section {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 30px;
    box-shadow: var(--shadow);
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 15px;
}

.results-header h2 {
    font-size: 1.5rem;
    color: var(--text-primary);
}

.results-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.results-meta {
    display: flex;
    gap: 20px;
    padding: 15px;
    background: var(--bg-color);
    border-radius: 6px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

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

.meta-item strong {
    color: var(--text-primary);
}

/* Split View Layout */
.split-view {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 20px;
    min-height: 600px;
}

.document-panel,
.text-panel {
    background: var(--bg-color);
    border-radius: 8px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.panel-header {
    padding: 15px 20px;
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.panel-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.page-controls,
.view-controls {
    display: flex;
    align-items: center;
    gap: 10px;
}

#pageInfo {
    font-size: 0.9rem;
    color: var(--text-secondary);
    min-width: 100px;
    text-align: center;
}

/* Document Viewer */
.document-viewer {
    flex: 1;
    overflow: auto;
    padding: 20px;
    background: #2a2a2a;
    display: flex;
    justify-content: center;
    align-items: flex-start;
}

.canvas-container {
    position: relative;
    display: inline-block;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

#pdfCanvas {
    display: block;
    max-width: 100%;
    height: auto;
}

.boxes-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.bounding-box {
    position: absolute;
    border: 2px solid var(--primary-color);
    background: rgba(79, 70, 229, 0.1);
    cursor: pointer;
    pointer-events: all;
    transition: all 0.2s;
}

.bounding-box:hover {
    background: rgba(79, 70, 229, 0.25);
    border-width: 3px;
    z-index: 10;
}

.bounding-box.active {
    background: rgba(251, 191, 36, 0.3);
    border-color: var(--highlight-color);
    border-width: 3px;
    z-index: 20;
}

/* Text Viewer */
.text-viewer {
    flex: 1;
    overflow: auto;
}

.text-content {
    padding: 20px;
}

#textBlocks {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.text-block {
    padding: 15px;
    background: var(--card-bg);
    border-radius: 6px;
    border: 2px solid transparent;
    transition: all 0.2s;
    cursor: pointer;
}

.text-block:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
}

.text-block.active {
    border-color: var(--highlight-color);
    background: #fffbeb;
    box-shadow: var(--shadow-lg);
}

.text-block-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
}

.text-block-meta {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.text-block-page {
    font-weight: 600;
    color: var(--primary-color);
}

.text-block-content {
    color: var(--text-primary);
    line-height: 1.6;
    white-space: pre-wrap;
    word-wrap: break-word;
}

#plainText {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 6px;
    overflow-x: auto;
    white-space: pre-wrap;
    word-wrap: break-word;
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 0.95rem;
    line-height: 1.6;
    border: 1px solid var(--border-color);
}

/* Error Message */
.error-message {
    padding: 15px;
    background: #fef2f2;
    border: 1px solid #fecaca;
    border-radius: 6px;
    color: var(--error-color);
    margin-top: 20px;
}

/* Footer */
footer {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Table View Styles */
.table-container {
    width: 100%;
    overflow-x: auto;
    overflow-y: auto;
    max-height: calc(100vh - 350px);
}

#dataTable {
    width: 100%;
    border-collapse: collapse;
    background: white;
    font-size: 0.9rem;
}

#dataTable thead {
    position: sticky;
    top: 0;
    z-index: 10;
    background: var(--primary-color);
}

#dataTable th {
    padding: 12px 16px;
    text-align: left;
    font-weight: 600;
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
    white-space: nowrap;
}

#dataTable td {
    padding: 10px 16px;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

#dataTable tbody tr {
    transition: background-color 0.2s;
    cursor: pointer;
}

#dataTable tbody tr:hover {
    background-color: #f3f4f6;
}

#dataTable tbody tr.active {
    background-color: #dbeafe;
    border-left: 3px solid var(--primary-color);
}

#dataTable tbody tr:nth-child(even) {
    background-color: #f9fafb;
}

#dataTable tbody tr:nth-child(even):hover {
    background-color: #f3f4f6;
}

/* Responsive */
@media (max-width: 1200px) {
    .split-view {
        grid-template-columns: 1fr;
    }

    .document-panel {
        min-height: 500px;
    }
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }

    .upload-section,
    .results-section {
        padding: 20px;
    }

    .results-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .results-actions {
        width: 100%;
    }

    .results-actions button {
        flex: 1;
    }

    .upload-tabs {
        flex-wrap: wrap;
    }

    .tab-btn {
        flex: 1;
        min-width: 100px;
    }

    .panel-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
}