/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo i {
    font-size: 1.5rem;
    color: #667eea;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #333;
}

.nav {
    display: flex;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: #555;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: #667eea;
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 4rem 0;
    color: white;
}

.hero h2 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 3rem;
    opacity: 0.9;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    flex-wrap: wrap;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.8;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Demo Section */
.demo-section {
    background: white;
    padding: 4rem 0;
}

.demo-section h3 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #333;
}

.api-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 2rem;
    padding: 1rem;
    background: #f8f9fa;
    border-radius: 8px;
    font-weight: 500;
}

.api-status.online i {
    color: #28a745;
}

.api-status.offline i {
    color: #dc3545;
}

.api-status.loading i {
    color: #ffc107;
    animation: pulse 1s infinite;
}

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

.demo-card {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    border: 1px solid #e9ecef;
}

.demo-card h4 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    color: #333;
    font-size: 1.3rem;
}

.demo-card h4 i {
    color: #667eea;
}

/* Input Styles */
.input-group {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

textarea {
    flex: 1;
    padding: 1rem;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    resize: vertical;
    transition: border-color 0.3s ease;
}

textarea:focus {
    outline: none;
    border-color: #667eea;
}

.btn-primary, .btn-secondary {
    padding: 1rem 2rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

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

.btn-secondary:hover {
    background: #545b62;
    transform: translateY(-2px);
}

/* Result Styles */
.result-card {
    background: #f8f9fa;
    border-radius: 8px;
    padding: 1.5rem;
    margin-top: 1rem;
    border-left: 4px solid #667eea;
}

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

.confidence-badge {
    background: #667eea;
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.sentiment-display {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.sentiment-icon {
    font-size: 3rem;
}

.sentiment-icon.positive::before {
    content: "😊";
}

.sentiment-icon.negative::before {
    content: "😞";
}

.sentiment-icon.neutral::before {
    content: "😐";
}

.sentiment-text {
    display: flex;
    flex-direction: column;
}

.sentiment-label {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.confidence-text {
    color: #666;
    font-size: 0.9rem;
}

/* Batch Results */
.batch-results {
    margin-top: 1.5rem;
}

.batch-result-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem;
    margin-bottom: 0.5rem;
    background: white;
    border-radius: 6px;
    border-left: 3px solid transparent;
}

.batch-result-item.positive {
    border-left-color: #28a745;
}

.batch-result-item.negative {
    border-left-color: #dc3545;
}

.batch-text {
    flex: 1;
    margin-right: 1rem;
    font-size: 0.9rem;
}

.batch-sentiment {
    font-weight: 600;
    margin-right: 0.5rem;
}

.batch-confidence {
    color: #666;
    font-size: 0.8rem;
}

/* Model Configuration */
.model-config {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
}

.config-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.config-group label {
    font-weight: 500;
    color: #555;
}

select {
    padding: 0.5rem;
    border: 2px solid #e9ecef;
    border-radius: 6px;
    font-family: inherit;
    background: white;
}

select:focus {
    outline: none;
    border-color: #667eea;
}

/* Metrics Section */
.metrics-section {
    background: #f8f9fa;
    padding: 4rem 0;
    min-height: 100vh; /* Altura mínima específica */
    max-height: 150vh; /* Altura máxima para evitar extensión infinita */
    overflow: hidden; /* Evitar desbordamiento */
}

.metrics-section h3 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #333;
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    max-width: 1200px; /* Anchura máxima para el grid */
    margin: 0 auto; /* Centrar el grid */
}

.metric-card {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    height: fit-content; /* Altura que se ajuste al contenido */
    max-height: 600px; /* Altura máxima para las tarjetas */
    overflow: hidden; /* Evitar desbordamiento */
}

/* Canvas específicamente para los gráficos */
.metric-card canvas {
    max-height: 300px !important;
    max-width: 100% !important;
}

.metric-card h4 {
    margin-bottom: 1.5rem;
    color: #333;
    text-align: center;
}

.metric-details {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: 1rem;
}

.metric-item {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
    border-bottom: 1px solid #e9ecef;
}

.metric-label {
    font-weight: 500;
    color: #555;
}

.metric-value {
    font-weight: 600;
    color: #333;
}

/* Performance Circles */
.performance-metrics {
    display: flex;
    justify-content: space-around;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.performance-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.performance-circle {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: conic-gradient(#667eea 0deg, #e9ecef 0deg);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    font-weight: 700;
    color: #333;
}

.performance-circle::before {
    content: '';
    position: absolute;
    width: 60px;
    height: 60px;
    background: white;
    border-radius: 50%;
}

.performance-circle span {
    position: relative;
    z-index: 1;
    font-size: 0.9rem;
}

/* Architecture Section */
.architecture-section {
    background: white;
    padding: 4rem 0;
}

.architecture-section h3 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #333;
}

.architecture-diagram {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 3rem;
}

.arch-component {
    background: white;
    border: 2px solid #e9ecef;
    border-radius: 12px;
    padding: 1.5rem;
    text-align: center;
    min-width: 120px;
    transition: all 0.3s ease;
    cursor: pointer;
}

.arch-component:hover {
    border-color: #667eea;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.2);
}

.arch-component i {
    font-size: 2rem;
    color: #667eea;
    margin-bottom: 0.5rem;
}

.arch-component h4 {
    margin-bottom: 0.5rem;
    color: #333;
}

.arch-component p {
    font-size: 0.8rem;
    color: #666;
}

.arch-arrow {
    font-size: 1.5rem;
    color: #667eea;
    font-weight: bold;
}

/* Tech Stack */
.tech-stack {
    text-align: center;
}

.tech-stack h4 {
    margin-bottom: 1.5rem;
    color: #333;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

.tech-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1rem;
    background: #f8f9fa;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.tech-item:hover {
    background: #667eea;
    color: white;
    transform: translateY(-2px);
}

.tech-item i {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.architecture-info {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.arch-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    background: #f8f9fa;
    border-radius: 6px;
}

.arch-item i {
    color: #667eea;
    width: 20px;
    text-align: center;
}

/* About Section */
.about-section {
    background: #f8f9fa;
    padding: 4rem 0;
}

.about-section h3 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #333;
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
    align-items: start;
}

.about-text h4 {
    margin: 1.5rem 0 1rem 0;
    color: #333;
}

.about-text ul {
    list-style: none;
    padding: 0;
}

.about-text li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.about-text li i {
    color: #28a745;
}

.about-stats {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.stat-box {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.stat-box h4 {
    margin-bottom: 1rem;
    color: #667eea;
}

/* Footer */
.footer {
    background: #333;
    color: white;
    padding: 3rem 0 1rem 0;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    margin-bottom: 1rem;
    color: #667eea;
}

.footer-section a {
    display: block;
    color: #ccc;
    text-decoration: none;
    margin-bottom: 0.5rem;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: #667eea;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #555;
    color: #aaa;
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    color: white;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top: 4px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 1rem;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 1rem;
    }
    
    .hero h2 {
        font-size: 2rem;
    }
    
    .hero-stats {
        gap: 1.5rem;
    }
    
    .input-group {
        flex-direction: column;
    }
    
    .metrics-grid {
        grid-template-columns: 1fr;
    }
    
    .architecture-diagram {
        flex-direction: column;
    }
    
    .arch-arrow {
        transform: rotate(90deg);
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .model-config {
        flex-direction: column;
    }
}

/* Chart containers */
canvas {
    max-width: 100%;
    height: auto;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.demo-card, .metric-card {
    animation: fadeIn 0.6s ease-out;
}

/* Utility classes */
.text-center { text-align: center; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }

/* Interpretability Section */
.interpretability-section {
    padding: 4rem 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    margin: 2rem 0;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.interpretability-section h3 {
    text-align: center;
    margin-bottom: 1rem;
    color: #333;
    font-size: 2.5rem;
    font-weight: 600;
}

.interpretability-section p {
    text-align: center;
    margin-bottom: 3rem;
    color: #666;
    font-size: 1.2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.interpretability-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.interpretation-card {
    min-height: 400px;
}

/* Attention Tabs */
.attention-tabs {
    display: flex;
    border-bottom: 1px solid #e1e5e9;
    margin-bottom: 1.5rem;
}

.tab-btn {
    background: none;
    border: none;
    padding: 0.75rem 1.5rem;
    cursor: pointer;
    font-weight: 500;
    color: #666;
    border-bottom: 2px solid transparent;
    transition: all 0.3s ease;
}

.tab-btn:hover {
    color: #667eea;
    background: rgba(102, 126, 234, 0.05);
}

.tab-btn.active {
    color: #667eea;
    border-bottom-color: #667eea;
    background: rgba(102, 126, 234, 0.05);
}

.tab-content {
    min-height: 300px;
}

.tab-panel {
    display: none;
}

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

/* Interactive Attention */
.interactive-attention {
    background: #f8fafc;
    border-radius: 10px;
    padding: 1.5rem;
}

.attention-controls {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.attention-controls label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
}

.attention-controls select {
    padding: 0.5rem;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    background: white;
    font-size: 0.9rem;
}

.attention-matrix {
    background: white;
    border-radius: 8px;
    padding: 1rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    overflow-x: auto;
}

/* Token Importance */
.token-importance-viz {
    background: #f8fafc;
    border-radius: 10px;
    padding: 1.5rem;
}

.token-bars {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.token-bar {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.token-bar-label {
    min-width: 80px;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    font-weight: bold;
}

.token-bar-fill {
    height: 20px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    border-radius: 4px;
    transition: width 0.5s ease;
}

.token-bar-value {
    font-size: 0.8rem;
    color: #666;
    min-width: 40px;
}

/* SHAP Explanation */
.shap-explanation {
    text-align: center;
}

.shap-explanation img {
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* Loading states */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 2rem;
    color: #667eea;
    font-weight: 500;
}

.loading i {
    font-size: 1.2rem;
}

/* Info placeholders */
.info-placeholder {
    text-align: center;
    padding: 2rem;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05), rgba(118, 75, 162, 0.05));
    border-radius: 12px;
    border: 2px dashed rgba(102, 126, 234, 0.3);
}

.info-placeholder i {
    font-size: 3rem;
    color: #667eea;
    margin-bottom: 1rem;
    opacity: 0.6;
}

.info-placeholder p {
    color: #666;
    font-size: 1rem;
    margin: 0.5rem 0;
}

.info-placeholder .placeholder-hint {
    font-weight: 600;
    color: #333;
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
}

.info-placeholder .feature-list {
    list-style: none;
    padding: 0;
    margin: 1rem auto;
    max-width: 400px;
    text-align: left;
}

.info-placeholder .feature-list li {
    padding: 0.5rem;
    color: #555;
    font-size: 0.9rem;
}

.info-placeholder .feature-list i {
    color: #667eea;
    margin-right: 0.5rem;
    font-size: 0.9rem;
}

/* Prediction result in interpretability */
#interpret-prediction {
    margin-top: 1.5rem;
    padding: 1rem;
    background: rgba(102, 126, 234, 0.05);
    border-radius: 8px;
    border-left: 4px solid #667eea;
}

/* Attention heatmap styling */
.attention-heatmap {
    width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.attention-heatmap-table {
    overflow-x: auto;
    max-width: 100%;
}

.attention-heatmap-table table {
    border-collapse: collapse;
    font-size: 0.8rem;
    white-space: nowrap;
}

.attention-heatmap-table td {
    padding: 4px 6px;
    border: 1px solid #e1e5e9;
    text-align: center;
    min-width: 40px;
}

.attention-heatmap-table .token-header {
    background: #f8fafc;
    font-weight: bold;
    writing-mode: vertical-rl;
    text-orientation: mixed;
    max-width: 30px;
    font-size: 0.7rem;
}

/* Responsive adjustments for interpretability */
@media (max-width: 768px) {
    .interpretability-grid {
        grid-template-columns: 1fr;
    }
    
    .attention-controls {
        flex-direction: column;
    }
    
    .attention-tabs {
        flex-wrap: wrap;
    }
    
    .tab-btn {
        flex: 1;
        min-width: 120px;
    }
}