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

:root {
    --primary-color: #5e72e4;
    --secondary-color: #11cdef;
    --success-color: #2dce89;
    --warning-color: #fb6340;
    --danger-color: #f5365c;
    --dark-color: #212529;
    --light-color: #f8f9fa;
    --border-color: #dee2e6;
    --shadow: 0 0 20px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 5px 25px rgba(0, 0, 0, 0.15);
    --radius: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    color: white;
    padding: 40px 0;
    animation: fadeInDown 0.8s ease;
}

header h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.subtitle {
    font-size: 1.2rem;
    opacity: 0.95;
}

.language-switch {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 30px;
    animation: fadeIn 1s ease;
}

.lang-btn {
    padding: 8px 20px;
    border: 2px solid white;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border-radius: 25px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 14px;
    font-weight: 500;
}

.lang-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

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

main {
    background: white;
    border-radius: var(--radius);
    padding: 40px;
    box-shadow: var(--shadow);
    animation: fadeInUp 0.8s ease;
}

.input-section {
    margin-bottom: 40px;
}

.input-section h2 {
    color: var(--dark-color);
    margin-bottom: 20px;
    font-size: 1.5rem;
    font-weight: 600;
}

#htmlInput {
    width: 100%;
    height: 200px;
    padding: 15px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 14px;
    resize: vertical;
    transition: var(--transition);
}

#htmlInput:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(94, 114, 228, 0.1);
}

.btn {
    padding: 12px 30px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), #4c63d2);
    color: white;
    margin-top: 15px;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(94, 114, 228, 0.3);
}

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

.btn-secondary:hover {
    background: #0da5c9;
    transform: translateY(-2px);
}

.tools-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-bottom: 40px;
}

.tool-card {
    padding: 25px;
    background: #f8f9fe;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
}

.tool-card h3 {
    color: var(--dark-color);
    margin-bottom: 20px;
    font-size: 1.2rem;
}

.selector-options,
.xpath-options {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
}

.selector-options label,
.xpath-options label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 14px;
}

.selector-options input[type="checkbox"],
.xpath-options input[type="radio"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.output-box {
    background: white;
    padding: 15px;
    border-radius: 8px;
    min-height: 80px;
    border: 1px solid var(--border-color);
}

.output-item {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}

.output-item:last-child {
    margin-bottom: 0;
}

.output-item strong {
    color: var(--primary-color);
    min-width: 50px;
}

.output-item code {
    flex: 1;
    background: #f4f5f7;
    padding: 8px 12px;
    border-radius: 6px;
    font-family: 'Monaco', 'Menlo', monospace;
    font-size: 13px;
    word-break: break-all;
}

.copy-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 6px 10px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    transition: var(--transition);
}

.copy-btn:hover {
    background: #4c63d2;
    transform: scale(1.1);
}

.extraction-section {
    margin-bottom: 40px;
}

.extraction-section h2 {
    color: var(--dark-color);
    margin-bottom: 20px;
    font-size: 1.5rem;
}

.extraction-controls {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}

#extractSelector {
    flex: 1;
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
}

#extractAttribute {
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    min-width: 150px;
}

.result-box {
    background: #f8f9fe;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 20px;
    min-height: 150px;
    max-height: 400px;
    overflow-y: auto;
}

.result-table {
    width: 100%;
    border-collapse: collapse;
}

.result-table th {
    background: var(--primary-color);
    color: white;
    padding: 12px;
    text-align: left;
    font-weight: 600;
}

.result-table td {
    padding: 10px;
    border-bottom: 1px solid var(--border-color);
}

.result-table tr:hover {
    background: rgba(94, 114, 228, 0.05);
}

.preview-section {
    margin-bottom: 40px;
}

.preview-section h2 {
    color: var(--dark-color);
    margin-bottom: 20px;
    font-size: 1.5rem;
}

.preview-box {
    margin-bottom: 20px;
}

.dom-tree {
    background: #f8f9fe;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 20px;
    max-height: 400px;
    overflow-y: auto;
}

.dom-tree h3 {
    color: var(--dark-color);
    margin-bottom: 15px;
}

.tree-list {
    list-style: none;
    padding-left: 0;
}

.tree-list ul {
    list-style: none;
    padding-left: 20px;
    margin-top: 5px;
}

.tree-node {
    display: inline-block;
    padding: 4px 8px;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    font-family: monospace;
    font-size: 13px;
    transition: var(--transition);
}

.tree-node:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.export-section {
    margin-bottom: 40px;
}

.export-section h2 {
    color: var(--dark-color);
    margin-bottom: 20px;
    font-size: 1.5rem;
}

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

.btn-export {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
}

.btn-export:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(118, 75, 162, 0.3);
}

.test-section {
    margin-bottom: 40px;
}

.test-section h2 {
    color: var(--dark-color);
    margin-bottom: 20px;
    font-size: 1.5rem;
}

.test-controls {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}

#testSelector {
    flex: 1;
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
}

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

.btn-test:hover {
    background: #26af67;
    transform: translateY(-2px);
}

.test-result {
    background: #f8f9fe;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 20px;
    min-height: 100px;
}

.test-result .success {
    color: var(--success-color);
    font-weight: 600;
}

.test-result .warning {
    color: var(--warning-color);
    font-weight: 600;
}

.test-result .error {
    color: var(--danger-color);
    font-weight: 600;
}

.matched-elements {
    margin-top: 15px;
}

.matched-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 10px;
    background: white;
    border-radius: 6px;
    margin-bottom: 10px;
}

.match-index {
    background: var(--primary-color);
    color: white;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
    min-width: 30px;
    text-align: center;
}

.matched-item code {
    flex: 1;
    font-family: monospace;
    font-size: 12px;
    color: #555;
    word-break: break-all;
}

footer {
    text-align: center;
    color: white;
    padding: 30px 0;
    margin-top: 40px;
}

.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 15px 25px;
    border-radius: 8px;
    color: white;
    font-weight: 500;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    opacity: 0;
    transform: translateY(-20px);
    transition: var(--transition);
    z-index: 1000;
}

.notification.show {
    opacity: 1;
    transform: translateY(0);
}

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

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

.notification.info {
    background: var(--primary-color);
}

.no-data {
    text-align: center;
    color: #999;
    padding: 40px;
    font-style: italic;
}

.highlight-element {
    outline: 3px solid var(--primary-color) !important;
    outline-offset: 2px;
    background: rgba(94, 114, 228, 0.1) !important;
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }
    
    main {
        padding: 20px;
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
    }
    
    .extraction-controls,
    .test-controls {
        flex-direction: column;
    }
    
    .export-buttons {
        flex-direction: column;
    }
    
    .btn-export {
        width: 100%;
    }
}