/* PDF to Text Converter Styles */
:root {
    /* Light theme colors */
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --secondary-color: #64748b;
    --accent-color: #8b5cf6;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --info-color: #06b6d4;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    
    --font-primary: 'Orbitron', monospace;
    --font-secondary: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --border-radius-lg: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.dark-theme {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    --border-color: #334155;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.4);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.5);
}

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

body {
    font-family: var(--font-secondary);
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: var(--transition);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header Styles */
header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
}

.logo a {
    text-decoration: none;
    color: var(--text-primary);
}

.logo h1 {
    font-family: var(--font-primary);
    font-size: 24px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.back-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
    font-size: 14px;
}

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

.theme-toggle {
    width: 40px;
    height: 40px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-secondary);
}

.theme-toggle:hover {
    background: var(--primary-color);
    color: white;
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 32px 0;
}

/* Tool Header */
.tool-header {
    margin-bottom: 32px;
}

.tool-info {
    display: flex;
    align-items: flex-start;
    gap: 24px;
}

.tool-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 36px;
    flex-shrink: 0;
}

.tool-details h1 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.tool-description {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.6;
}

.tool-features {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.feature-tag {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: 12px;
    color: var(--text-secondary);
}

/* Tool Interface */
.tool-interface {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
}

/* Upload Section */
.upload-section {
    padding: 32px;
    border-bottom: 1px solid var(--border-color);
}

.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: var(--border-radius);
    padding: 48px 24px;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
    position: relative;
}

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

.upload-area.drag-over {
    border-color: var(--primary-color);
    background: rgba(59, 130, 246, 0.1);
}

.upload-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.upload-icon {
    font-size: 48px;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.upload-area h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.upload-area p {
    color: var(--text-secondary);
    font-size: 14px;
}

.upload-btn {
    padding: 12px 24px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius-sm);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 8px;
}

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

/* File Info */
.file-info {
    margin-top: 24px;
    padding: 24px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
}

.file-preview {
    display: flex;
    align-items: center;
    gap: 16px;
}

.file-icon {
    width: 48px;
    height: 48px;
    background: var(--error-color);
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 20px;
}

.file-details {
    flex: 1;
}

.file-details h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.file-stats {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 14px;
    color: var(--text-secondary);
}

.stat-label {
    font-weight: 500;
}

.remove-file {
    width: 32px;
    height: 32px;
    background: var(--error-color);
    border: none;
    border-radius: var(--border-radius-sm);
    color: white;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.remove-file:hover {
    background: #dc2626;
}

/* Options Section */
.options-section {
    padding: 32px;
    border-bottom: 1px solid var(--border-color);
}

.options-section h2 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
    margin-bottom: 32px;
}

.option-group h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.format-options {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.option-item {
    display: flex;
    align-items: center;
    cursor: pointer;
}

.option-item input[type="radio"] {
    margin-right: 12px;
}

.option-content {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
    flex: 1;
}

.option-item input[type="radio"]:checked + .option-content {
    background: rgba(59, 130, 246, 0.1);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.page-range-options {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.range-inputs {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 12px;
    padding: 0 24px;
}

.range-inputs input {
    width: 80px;
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    background: var(--bg-primary);
    color: var(--text-primary);
}

.advanced-options {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.checkbox-item {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    color: var(--text-secondary);
}

.checkbox-item input[type="checkbox"] {
    margin-right: 8px;
}

/* Processing Section */
.processing-section {
    padding: 48px 32px;
    text-align: center;
}

.processing-animation {
    margin-bottom: 24px;
}

.extraction-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    margin-bottom: 24px;
}

.pdf-icon, .text-icon {
    width: 80px;
    height: 80px;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    color: white;
}

.pdf-icon {
    background: var(--error-color);
}

.text-icon {
    background: var(--success-color);
}

.extraction-arrow {
    font-size: 24px;
    color: var(--primary-color);
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.processing-section h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    margin-bottom: 8px;
    overflow: hidden;
}

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

.progress-text {
    color: var(--text-secondary);
    font-size: 14px;
}

/* Results Section */
.results-section {
    padding: 32px;
}

.results-section h2 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.text-preview {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    margin-bottom: 24px;
}

.preview-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.preview-header h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.preview-stats {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.stat {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--text-secondary);
}

.text-content {
    padding: 20px;
    max-height: 400px;
    overflow-y: auto;
    font-family: 'Courier New', monospace;
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    white-space: pre-wrap;
}

.download-options {
    margin-bottom: 24px;
}

.download-options h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.download-buttons {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    padding: 12px 20px;
    border: none;
    border-radius: var(--border-radius-sm);
    font-weight: 500;
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    justify-content: center;
}

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

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

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

.btn.secondary:hover {
    background: var(--bg-primary);
    color: var(--text-primary);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.action-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Footer */
footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 24px 0;
    text-align: center;
    color: var(--text-secondary);
    font-size: 14px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }
    
    header .container {
        padding: 12px 16px;
    }
    
    .tool-info {
        flex-direction: column;
        gap: 16px;
    }
    
    .tool-icon {
        width: 64px;
        height: 64px;
        font-size: 28px;
    }
    
    .tool-details h1 {
        font-size: 24px;
    }
    
    .options-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .extraction-visual {
        flex-direction: column;
        gap: 16px;
    }
    
    .pdf-icon, .text-icon {
        width: 64px;
        height: 64px;
        font-size: 24px;
    }
    
    .download-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
}