/* Root Variables */
:root {
    --primary: #4a90e2;
    --secondary: #f5f5f5;
    --text: #333;
    --text-light: #666;
    --card-bg: #fff;
    --bg: #f0f2f5;
    --border: #e0e0e0;
    --shadow: rgba(0, 0, 0, 0.1);
    --good: #4CAF50;
    --moderate: #FFC107;
    --unhealthy-sensitive: #FF9800;
    --unhealthy: #F44336;
    --very-unhealthy: #9C27B0;
    --hazardous: #795548;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.6;
    padding: 20px;
}

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

/* Header */
header {
    text-align: center;
    margin-bottom: 40px;
}

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

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

.dataset-title {
    background-color: rgba(74, 144, 226, 0.15);
    padding: 12px 20px;
    border-radius: 8px;
    font-size: 1.05rem;
    font-weight: 600;
    margin-top: 15px;
    border: 2px solid rgba(74, 144, 226, 0.3);
    color: var(--primary);
}

/* Cards */
.card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 25px;
    margin-bottom: 25px;
    box-shadow: 0 2px 10px var(--shadow);
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px var(--shadow);
}

h2 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--primary);
    border-bottom: 2px solid var(--border);
    padding-bottom: 10px;
}

/* Current Air Quality Status */
.current-status {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 40px;
    padding: 20px;
}

.aqi-display {
    text-align: center;
}

.aqi-value {
    font-size: 4rem;
    font-weight: bold;
    color: var(--primary);
}

.aqi-label {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-top: 5px;
}

.aqi-details {
    text-align: left;
}

.aqi-category {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.pm25-value {
    font-size: 1.2rem;
    color: var(--text);
    margin-bottom: 5px;
}

.last-updated {
    font-size: 0.9rem;
    color: var(--text-light);
}

/* Forecast Container */
.forecast-container {
    position: relative;
}

.forecast-stats {
    display: flex;
    justify-content: space-around;
    margin-top: 20px;
    padding: 15px;
    background-color: var(--secondary);
    border-radius: 8px;
}

.stat-item {
    text-align: center;
}

.stat-label {
    display: block;
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 5px;
}

.stat-value {
    display: block;
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--primary);
}

/* Buttons */
.btn {
    display: block;
    width: 220px;
    margin: 20px auto;
    padding: 12px 24px;
    background-color: var(--primary);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.3s;
    box-shadow: 0 2px 5px var(--shadow);
}

.btn:hover {
    background-color: #3a7bc8;
    transform: translateY(-2px);
    box-shadow: 0 4px 10px var(--shadow);
}

.btn:active {
    transform: translateY(0);
}

.btn:disabled {
    background-color: #ccc;
    cursor: not-allowed;
    transform: none;
}

/* Filters */
.filters {
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.filters label {
    font-weight: 600;
    color: var(--text);
}

select {
    padding: 8px 15px;
    border-radius: 6px;
    border: 1px solid var(--border);
    background-color: white;
    font-size: 1rem;
    cursor: pointer;
    transition: border-color 0.3s;
}

select:hover {
    border-color: var(--primary);
}

select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

/* Dataset Switcher */
.dataset-switcher {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.dataset-switcher h2 {
    color: white;
    border-bottom-color: rgba(255, 255, 255, 0.3);
}

.switcher-buttons {
    display: flex;
    gap: 15px;
    margin: 20px 0;
    flex-wrap: wrap;
}

.btn-dataset {
    flex: 1;
    min-width: 200px;
    background-color: rgba(255, 255, 255, 0.2);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-dataset:hover {
    background-color: rgba(255, 255, 255, 0.3);
}

.btn-dataset.active {
    background-color: white;
    color: #667eea;
    border-color: white;
    font-weight: bold;
}

.dataset-source-info {
    background-color: rgba(255, 255, 255, 0.15);
    padding: 15px;
    border-radius: 8px;
    margin-top: 15px;
    font-size: 0.95rem;
}

.extra-metadata {
    margin-top: 15px;
    padding: 15px;
    background-color: var(--secondary);
    border-radius: 8px;
    border-left: 4px solid var(--primary);
}

.metadata-item {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid #e0e0e0;
}

.metadata-item:last-child {
    border-bottom: none;
}

.metadata-label {
    font-weight: 600;
    color: var(--text-light);
}

.metadata-value {
    color: var(--text);
    font-weight: 500;
}

/* Charts */
canvas {
    width: 100% !important;
    max-height: 400px;
    margin: 0 auto;
}

/* Upload Section */
.upload-container {
    padding: 10px 0;
}

.upload-info {
    margin-bottom: 20px;
    padding: 15px;
    background-color: var(--secondary);
    border-radius: 8px;
}

.upload-info p {
    margin-bottom: 8px;
}

.upload-format {
    color: var(--primary);
    font-weight: 600;
}

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

.upload-note {
    color: var(--primary);
    font-size: 0.9rem;
    margin-top: 10px;
    padding: 8px;
    background-color: rgba(74, 144, 226, 0.1);
    border-radius: 4px;
}

.csv-help {
    margin-top: 15px;
    padding: 10px;
    background-color: #fff3cd;
    border: 1px solid #ffc107;
    border-radius: 6px;
}

.csv-help summary {
    cursor: pointer;
    font-weight: 600;
    color: #856404;
    padding: 5px;
}

.csv-help summary:hover {
    color: #533f03;
}

.csv-help-content {
    margin-top: 10px;
    padding: 10px;
}

.csv-help-content h4 {
    color: #856404;
    margin-bottom: 8px;
}

.csv-help-content pre {
    background-color: #f8f9fa;
    padding: 10px;
    border-radius: 4px;
    overflow-x: auto;
    font-size: 0.85rem;
    border: 1px solid #dee2e6;
}

.csv-help-content ul {
    margin: 10px 0;
    padding-left: 20px;
}

.csv-help-content li {
    margin: 5px 0;
    font-size: 0.9rem;
}

.csv-help-content code {
    background-color: #f8f9fa;
    padding: 2px 6px;
    border-radius: 3px;
    font-size: 0.9rem;
}

.upload-area {
    text-align: center;
    padding: 20px;
    border: 2px dashed var(--border);
    border-radius: 8px;
    margin-bottom: 20px;
    transition: all 0.3s;
}

.upload-area:hover {
    border-color: var(--primary);
    background-color: rgba(74, 144, 226, 0.05);
}

.btn-upload {
    background-color: #27ae60;
}

.btn-upload:hover {
    background-color: #229954;
}

.upload-status {
    margin-top: 15px;
    padding: 10px;
    border-radius: 6px;
    font-weight: 500;
}

.upload-status.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.upload-status.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.upload-status.processing {
    background-color: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

.dataset-info {
    padding: 20px;
    background-color: var(--secondary);
    border-radius: 8px;
    margin-top: 20px;
}

.dataset-info h3 {
    color: var(--primary);
    margin-bottom: 15px;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

.info-item {
    padding: 12px;
    background-color: white;
    border-radius: 6px;
    box-shadow: 0 1px 3px var(--shadow);
}

.info-label {
    display: block;
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 5px;
}

.info-value {
    display: block;
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--primary);
}

/* Model Information */
.model-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.info-section {
    padding: 15px;
    background-color: var(--secondary);
    border-radius: 8px;
}

.info-section h3 {
    color: var(--primary);
    margin-bottom: 10px;
    font-size: 1.2rem;
}

.info-section p {
    color: var(--text);
    line-height: 1.6;
}

.info-section ul {
    list-style-position: inside;
    color: var(--text);
}

.info-section li {
    margin-bottom: 8px;
    padding-left: 10px;
}

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

.disclaimer {
    margin-top: 10px;
    font-style: italic;
    font-size: 0.85rem;
}

/* AQI Color Classes */
.aqi-good {
    color: var(--good) !important;
}

.aqi-moderate {
    color: var(--moderate) !important;
}

.aqi-unhealthy-sensitive {
    color: var(--unhealthy-sensitive) !important;
}

.aqi-unhealthy {
    color: var(--unhealthy) !important;
}

.aqi-very-unhealthy {
    color: var(--very-unhealthy) !important;
}

.aqi-hazardous {
    color: var(--hazardous) !important;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    .card {
        padding: 15px;
    }
    
    .current-status {
        flex-direction: column;
        gap: 20px;
    }
    
    .aqi-value {
        font-size: 3rem;
    }
    
    .aqi-category {
        font-size: 1.5rem;
    }
    
    .forecast-stats {
        flex-direction: column;
        gap: 15px;
    }
    
    .model-info {
        grid-template-columns: 1fr;
    }
    
    .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 1.5rem;
    }
    
    h2 {
        font-size: 1.2rem;
    }
    
    .aqi-value {
        font-size: 2.5rem;
    }
    
    canvas {
        max-height: 300px;
    }
}

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

.btn-loader {
    display: inline-block;
}

/* Forecast Description */
.forecast-description {
    background-color: rgba(74, 144, 226, 0.1);
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    border-left: 4px solid var(--primary);
    font-size: 0.95rem;
}

.analysis-description {
    background-color: rgba(102, 126, 234, 0.1);
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    border-left: 4px solid #667eea;
    font-size: 0.95rem;
}

/* Country Analysis */
.country-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-bottom: 25px;
}

.country-stat-card {
    background-color: var(--secondary);
    padding: 15px;
    border-radius: 8px;
    text-align: center;
    border: 2px solid var(--border);
    transition: transform 0.2s, box-shadow 0.2s;
}

.country-stat-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 12px var(--shadow);
    border-color: var(--primary);
}

.country-name {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 10px;
}

.country-aqi {
    font-size: 2rem;
    font-weight: bold;
    margin: 10px 0;
}

.country-status {
    font-size: 0.9rem;
    font-weight: 600;
    padding: 5px 10px;
    border-radius: 5px;
    display: inline-block;
}

/* Extended Forecast */
.extended-forecast-controls {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.extended-forecast-controls label {
    font-weight: 600;
    color: var(--text);
}

.extended-forecast-controls select {
    padding: 10px 15px;
    border: 2px solid var(--border);
    border-radius: 6px;
    font-size: 1rem;
    background-color: white;
    cursor: pointer;
}

.extended-summary {
    margin-top: 25px;
    padding: 20px;
    background: linear-gradient(135deg, rgba(74, 144, 226, 0.1) 0%, rgba(102, 126, 234, 0.1) 100%);
    border-radius: 10px;
    border: 2px solid rgba(74, 144, 226, 0.3);
}

.extended-summary h3 {
    color: var(--primary);
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.day-forecast {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
    margin-top: 15px;
}

.day-card {
    background-color: white;
    padding: 15px;
    border-radius: 8px;
    text-align: center;
    border: 2px solid var(--border);
    transition: transform 0.2s, box-shadow 0.2s;
}

.day-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 12px var(--shadow);
}

.day-label {
    font-weight: 700;
    color: var(--text);
    margin-bottom: 10px;
    font-size: 0.95rem;
}

.day-aqi {
    font-size: 1.8rem;
    font-weight: bold;
    margin: 10px 0;
}

.day-category {
    font-size: 0.85rem;
    font-weight: 600;
    padding: 4px 8px;
    border-radius: 4px;
    display: inline-block;
    margin-top: 5px;
}

/* ============================================
   BUSINESS VALUE & IMPACT DASHBOARD
   ============================================ */

.business-value-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
}

.business-value-card h2 {
    color: white;
    font-size: 2rem;
    margin-bottom: 15px;
}

.business-intro {
    background-color: rgba(255, 255, 255, 0.15);
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 30px;
    border-left: 4px solid rgba(255, 255, 255, 0.5);
    font-size: 1rem;
}

/* Impact Metrics Grid */
.impact-metrics {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.impact-card {
    background-color: white;
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s, box-shadow 0.3s;
    position: relative;
    overflow: hidden;
}

.impact-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #4a90e2, #667eea);
}

.impact-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.health-impact::before {
    background: linear-gradient(90deg, #4CAF50, #81C784);
}

.cost-impact::before {
    background: linear-gradient(90deg, #FFC107, #FFD54F);
}

.operational-impact::before {
    background: linear-gradient(90deg, #2196F3, #64B5F6);
}

.risk-impact::before {
    background: linear-gradient(90deg, #FF5722, #FF8A65);
}

.impact-icon {
    font-size: 3rem;
    margin-bottom: 15px;
    text-align: center;
}

.impact-content h3 {
    color: var(--text);
    font-size: 1.1rem;
    margin-bottom: 10px;
    font-weight: 600;
}

.impact-value {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--primary);
    margin: 15px 0;
    text-align: center;
}

.impact-desc {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 10px;
    text-align: center;
}

.impact-stats {
    background-color: var(--secondary);
    padding: 10px;
    border-radius: 6px;
    font-size: 0.85rem;
    color: var(--text);
    text-align: center;
    font-weight: 500;
}

.impact-stats span {
    color: var(--primary);
    font-weight: bold;
    font-size: 1.1rem;
}

/* Use Cases Section */
.use-cases-section {
    margin-bottom: 40px;
}

.use-cases-section h3 {
    color: white;
    font-size: 1.5rem;
    margin-bottom: 20px;
    text-align: center;
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

.use-case {
    background-color: rgba(255, 255, 255, 0.95);
    padding: 20px;
    border-radius: 10px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
    cursor: pointer;
}

.use-case:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
    background-color: white;
}

.use-case-icon {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.use-case h4 {
    color: var(--primary);
    font-size: 1rem;
    margin-bottom: 8px;
    font-weight: 600;
}

.use-case p {
    color: var(--text-light);
    font-size: 0.85rem;
    line-height: 1.4;
}

/* ROI Calculator Section */
.roi-section {
    background-color: rgba(255, 255, 255, 0.1);
    padding: 25px;
    border-radius: 12px;
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.roi-section h3 {
    color: white;
    font-size: 1.5rem;
    margin-bottom: 20px;
    text-align: center;
}

.roi-calculator {
    background-color: white;
    padding: 25px;
    border-radius: 10px;
}

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

.roi-input-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    position: relative;
}

.roi-input-group label {
    color: var(--text);
    font-weight: 600;
    font-size: 0.9rem;
}

.roi-input-group input {
    padding: 12px;
    border: 2px solid var(--border);
    border-radius: 6px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.roi-input-group input:focus {
    outline: none;
    border-color: var(--primary);
}

.input-suffix {
    position: absolute;
    right: 12px;
    bottom: 12px;
    color: var(--text-light);
    font-weight: 600;
    pointer-events: none;
}

.btn-calculate {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 12px 30px;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    grid-column: 1 / -1;
}

.btn-calculate:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.roi-results {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 25px;
    padding-top: 25px;
    border-top: 2px solid var(--border);
}

.roi-result-item {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    padding: 20px;
    border-radius: 8px;
    text-align: center;
}

.roi-label {
    display: block;
    color: var(--text-light);
    font-size: 0.85rem;
    margin-bottom: 10px;
    font-weight: 500;
}

.roi-value {
    display: block;
    color: var(--primary);
    font-size: 2rem;
    font-weight: bold;
}

/* Health Advisory Card */
.health-advisory-card {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
    border: none;
    box-shadow: 0 10px 30px rgba(240, 147, 251, 0.3);
}

.health-advisory-card h2,
.health-advisory-card h3 {
    color: white;
}

.advisory-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.advisory-section {
    background-color: rgba(255, 255, 255, 0.95);
    padding: 20px;
    border-radius: 10px;
}

.advisory-section h3 {
    color: var(--primary);
    font-size: 1.2rem;
    margin-bottom: 15px;
    border-bottom: 2px solid var(--border);
    padding-bottom: 10px;
}

.risk-advisory {
    padding: 15px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
}

.action-list,
.vulnerable-list {
    list-style: none;
}

.action-list li,
.vulnerable-list li {
    padding: 10px;
    margin-bottom: 8px;
    background-color: var(--secondary);
    border-radius: 6px;
    border-left: 3px solid var(--primary);
    color: var(--text);
}

.action-list li::before {
    content: '✓ ';
    color: var(--good);
    font-weight: bold;
    margin-right: 8px;
}

.vulnerable-list li::before {
    content: '⚠ ';
    color: var(--unhealthy);
    font-weight: bold;
    margin-right: 8px;
}

.forecast-timeline {
    background-color: rgba(255, 255, 255, 0.95);
    padding: 20px;
    border-radius: 10px;
}

.forecast-timeline h3 {
    color: var(--primary);
    margin-bottom: 15px;
}

/* Responsive Design for Business Value */
@media (max-width: 768px) {
    .impact-metrics {
        grid-template-columns: 1fr;
    }
    
    .use-cases-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }
    
    .roi-inputs {
        grid-template-columns: 1fr;
    }
    
    .advisory-grid {
        grid-template-columns: 1fr;
    }
}