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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    overflow: hidden;
}

.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 30px;
    text-align: center;
}

.header h1 {
    font-size: 2.5em;
    font-weight: 300;
    margin-bottom: 10px;
}

.header p {
    opacity: 0.9;
    font-size: 1.1em;
}

.tabs {
    display: flex;
    background: #f8f9fa;
    border-bottom: 1px solid #e9ecef;
}

.tab {
    flex: 1;
    padding: 15px 20px;
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    color: #6c757d;
    transition: all 0.3s ease;
}

.tab.active {
    background: white;
    color: #667eea;
    border-bottom: 3px solid #667eea;
}

.tab:hover {
    background: #e9ecef;
}

.tab-content {
    display: none;
    padding: 30px;
}

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

.controls {
    background: #f8f9fa;
    border-bottom: 1px solid #e9ecef;
}

.file-input-container {
    display: flex;
    gap: 15px;
    align-items: center;
    margin-bottom: 20px;
}

.file-input-wrapper {
    position: relative;
    overflow: hidden;
    display: inline-block;
}

.file-input-wrapper input[type=file] {
    position: absolute;
    left: -9999px;
}

.file-input-label {
    background: #667eea;
    color: white;
    padding: 12px 24px;
    border-radius: 25px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
    display: inline-block;
}

.file-input-label:hover {
    background: #5a67d8;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.selected-folder {
    flex: 1;
    background: white;
    border: 2px solid #e9ecef;
    border-radius: 10px;
    padding: 12px 16px;
    font-size: 14px;
    color: #666;
}

.action-buttons {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
    font-size: 14px;
}

.btn-primary {
    background: #28a745;
    color: white;
}

.btn-primary:hover {
    background: #218838;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.btn-secondary {
    background: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background: #5a6268;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.btn-info {
    background: #17a2b8;
    color: white;
}

.btn-info:hover {
    background: #138496;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.btn-warning {
    background: #ffc107;
    color: #212529;
}

.btn-warning:hover {
    background: #e0a800;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.btn-danger {
    background: #dc3545;
    color: white;
}

.btn-danger:hover {
    background: #c82333;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.settings-section {
    margin-bottom: 30px;
}

.settings-section h3 {
    color: #495057;
    margin-bottom: 15px;
    font-size: 18px;
}

.settings-section p {
    color: #6c757d;
    margin-bottom: 15px;
    font-size: 14px;
}

.tags-container {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 15px;
    min-height: 40px;
    border: 2px dashed #e9ecef;
    border-radius: 10px;
    padding: 10px;
    background: #f8f9fa;
}

.tag {
    background: #667eea;
    color: white;
    padding: 5px 10px;
    border-radius: 15px;
    font-size: 12px;
    display: flex;
    align-items: center;
    gap: 5px;
}

.tag-remove {
    background: rgba(255, 255, 255, 0.3);
    border: none;
    color: white;
    border-radius: 50%;
    width: 16px;
    height: 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
}

.tag-remove:hover {
    background: rgba(255, 255, 255, 0.5);
}

.add-tag-container {
    display: flex;
    gap: 10px;
    align-items: center;
}

.add-tag-input {
    flex: 1;
    padding: 8px 12px;
    border: 1px solid #e9ecef;
    border-radius: 20px;
    font-size: 14px;
}

.add-tag-btn {
    padding: 8px 16px;
    background: #28a745;
    color: white;
    border: none;
    border-radius: 20px;
    cursor: pointer;
    font-size: 14px;
}

.add-tag-btn:hover {
    background: #218838;
}

.settings-actions {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-top: 30px;
}

.status-bar {
    padding: 15px 30px;
    background: #e9ecef;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
    color: #666;
}

.progress-bar {
    width: 200px;
    height: 6px;
    background: #dee2e6;
    border-radius: 3px;
    overflow: hidden;
    display: none;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #667eea, #764ba2);
    width: 0%;
    transition: width 0.3s ease;
}

.stats {
    display: flex;
    gap: 20px;
    font-size: 13px;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 5px;
}

.content-area {
    height: 500px;
    display: flex;
    position: relative;
}

.line-numbers {
    width: 60px;
    background: #f8f9fa;
    border-right: 1px solid #e9ecef;
    padding: 20px 10px;
    font-family: 'Courier New', monospace;
    font-size: 12px;
    line-height: 1.5;
    color: #6c757d;
    overflow: hidden;
    user-select: none;
}

.text-content {
    flex: 1;
    padding: 20px;
    font-family: 'Courier New', monospace;
    font-size: 12px;
    line-height: 1.5;
    overflow: auto;
    white-space: pre-wrap;
    word-wrap: break-word;
    background: white;
    color: #333;
}

.truncated-warning {
    position: absolute;
    top: 10px;
    right: 10px;
    background: #ffc107;
    color: #212529;
    padding: 8px 12px;
    border-radius: 5px;
    font-size: 12px;
    font-weight: 500;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
    z-index: 10;
    display: none;
}

.analysis-panel {
    background: #f8f9fa;
    padding: 20px;
    border-top: 1px solid #e9ecef;
    display: none;
}

.analysis-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.analysis-card {
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.analysis-card h3 {
    color: #495057;
    margin-bottom: 10px;
    font-size: 16px;
}

.analysis-card .value {
    font-size: 24px;
    font-weight: bold;
    color: #667eea;
}

.file-types {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.file-type-badge {
    background: #667eea;
    color: white;
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 12px;
}

.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    background: #28a745;
    color: white;
    padding: 15px 20px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
    transform: translateX(400px);
    transition: transform 0.3s ease;
    z-index: 1000;
}

.toast.show {
    transform: translateX(0);
}

.placeholder-message {
    text-align: center;
    color: #6c757d;
    font-size: 16px;
    margin-top: 100px;
}

.loading {
    text-align: center;
    padding: 50px;
    color: #6c757d;
}

.loading .spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@media (max-width: 768px) {
    .container {
        margin: 10px;
        border-radius: 10px;
    }
    
    .file-input-container {
        flex-direction: column;
        align-items: stretch;
    }
    
    .action-buttons {
        justify-content: center;
    }
    
    .content-area {
        height: 400px;
    }
}