:root {
    --primary: #3498db;
    --primary-dark: #2980b9;
    --secondary: #2ecc71;
    --danger: #e74c3c;
    --warning: #f39c12;
    --info: #1abc9c;
    --dark: #2c3e50;
    --light: #ecf0f1;
    --gray: #95a5a6;
    --dark-gray: #7f8c8d;
    --white: #ffffff;
    --black: #000000;
    
    --good: #2ecc71;
    --moderate: #f1c40f;
    --unhealthy: #e67e22;
    --very-unhealthy: #e74c3c;
    --hazardous: #8e44ad;
    
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 6px 12px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}

body {
    background-color: #f5f7fa;
    color: var(--dark);
    line-height: 1.6;
}

.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.app-header {
    background-color: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

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

.logo i {
    font-size: 28px;
    color: var(--primary);
    margin-right: 10px;
}

.logo h1 {
    font-size: 20px;
    font-weight: 600;
    color: var(--dark);
}

.logo h1 span {
    font-weight: 400;
    font-size: 16px;
    color: var(--dark-gray);
}

.last-update {
    display: flex;
    align-items: center;
    font-size: 14px;
    color: var(--dark-gray);
}

/* Database Selector Styles - Added */
.database-selector {
    margin-left: 20px;
    display: flex;
    align-items: center;
}

.database-selector label {
    margin-right: 10px;
    font-size: 14px;
    color: var(--dark);
    font-weight: 500;
}

.database-selector select {
    padding: 6px 12px;
    border: 1px solid var(--light);
    border-radius: 5px;
    background-color: var(--white);
    color: var(--dark);
    font-size: 14px;
    transition: var(--transition);
}

.database-selector select:focus {
    outline: none;
    border-color: var(--primary);
}

.status-indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    margin-left: 10px;
    background-color: var(--gray);
}

.status-indicator.connected {
    background-color: var(--secondary);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(46, 204, 113, 0.7);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(46, 204, 113, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(46, 204, 113, 0);
    }
}

.status-indicator.disconnected {
    background-color: var(--danger);
}

.tabs {
    background-color: var(--light);
}

.tabs ul {
    display: flex;
    list-style: none;
}

.tabs li {
    padding: 15px 25px;
    cursor: pointer;
    font-weight: 500;
    color: var(--dark-gray);
    transition: var(--transition);
    border-bottom: 3px solid transparent;
}

.tabs li i {
    margin-right: 8px;
}

.tabs li.active {
    color: var(--primary);
    border-bottom: 3px solid var(--primary);
    background-color: rgba(52, 152, 219, 0.1);
}

.tabs li:hover:not(.active) {
    color: var(--dark);
    background-color: rgba(52, 152, 219, 0.05);
}

.app-main {
    flex: 1;
    padding: 20px;
    background-color: var(--white);
}

.tab-content {
    display: none;
    animation: fadeIn 0.5s ease;
}

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

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Dashboard Tab Styles */
.air-status-card {
    background-color: var(--white);
    border-radius: 10px;
    box-shadow: var(--shadow);
    margin-bottom: 20px;
    overflow: hidden;
    transition: var(--transition);
}

.air-status-card:hover {
    box-shadow: var(--shadow-hover);
}

.air-status-card h2 {
    padding: 15px 20px;
    background-color: var(--dark);
    color: var(--white);
    font-size: 18px;
    font-weight: 500;
}

.air-status-card h2 i {
    margin-right: 10px;
}

.status-container {
    display: flex;
    flex-wrap: wrap;
}

.overall-status {
    flex: 1;
    min-width: 300px;
    padding: 20px;
    display: flex;
    align-items: center;
    border-right: 1px solid var(--light);
}

.status-circle {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin-right: 20px;
    background-color: var(--light);
    color: var(--dark);
    font-size: 14px;
    font-weight: 500;
}

.status-circle i {
    font-size: 30px;
    margin-bottom: 5px;
}

.status-good {
    background-color: rgba(46, 204, 113, 0.2);
    color: var(--good);
    border: 5px solid var(--good);
}

.status-moderate {
    background-color: rgba(241, 196, 15, 0.2);
    color: var(--moderate);
    border: 5px solid var(--moderate);
}

.status-unhealthy {
    background-color: rgba(230, 126, 34, 0.2);
    color: var(--unhealthy);
    border: 5px solid var(--unhealthy);
}

.status-very-unhealthy {
    background-color: rgba(231, 76, 60, 0.2);
    color: var(--very-unhealthy);
    border: 5px solid var(--very-unhealthy);
}

.status-hazardous {
    background-color: rgba(142, 68, 173, 0.2);
    color: var(--hazardous);
    border: 5px solid var(--hazardous);
}

.status-message h3 {
    font-size: 20px;
    margin-bottom: 5px;
}

.status-message p {
    color: var(--dark-gray);
    font-size: 14px;
}

.action-recommendation {
    flex: 1;
    min-width: 300px;
    padding: 20px;
}

.action-recommendation h3 {
    font-size: 18px;
    margin-bottom: 15px;
    color: var(--dark);
}

.action-recommendation h3 i {
    color: var(--warning);
    margin-right: 10px;
}

.action-recommendation p {
    color: var(--dark-gray);
    line-height: 1.6;
}

.alert-notification {
    display: none;
    background-color: var(--warning);
    color: var(--white);
    border-radius: 8px;
    padding: 15px 20px;
    margin-bottom: 20px;
    align-items: center;
    animation: slideIn 0.5s ease;
    box-shadow: var(--shadow);
}

@keyframes slideIn {
    from {
        transform: translateY(-20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.alert-notification.show {
    display: flex;
}

.alert-icon {
    font-size: 24px;
    margin-right: 15px;
}

.alert-content {
    flex: 1;
}

.alert-content h3 {
    font-size: 16px;
    margin-bottom: 5px;
}

.alert-content p {
    font-size: 14px;
}

.alert-close {
    background: none;
    border: none;
    color: var(--white);
    font-size: 20px;
    cursor: pointer;
    padding: 0 5px;
}

.alert-close:hover {
    opacity: 0.8;
}

.sensor-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.sensor-card {
    background-color: var(--white);
    border-radius: 10px;
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: var(--transition);
}

.sensor-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.sensor-card .card-header {
    display: flex;
    align-items: center;
    padding: 15px;
    color: var(--white);
}

.sensor-card .card-header i {
    font-size: 20px;
    margin-right: 10px;
}

.sensor-card .card-header h3 {
    font-size: 16px;
    font-weight: 500;
}

.sensor-card.temperature .card-header {
    background-color: var(--danger);
}

.sensor-card.humidity .card-header {
    background-color: var(--primary);
}

.sensor-card.co2 .card-header {
    background-color: var(--secondary);
}

.sensor-card.hazardous .card-header {
    background-color: var(--warning);
}

.sensor-card.pm .card-header {
    background-color: var(--info);
}

.sensor-card .card-body {
    padding: 20px;
    text-align: center;
}

.sensor-value {
    font-size: 36px;
    font-weight: 300;
    margin-bottom: 5px;
}

.sensor-unit {
    font-size: 16px;
    color: var(--dark-gray);
}

.sensor-card .card-footer {
    display: flex;
    justify-content: space-between;
    padding: 10px 15px;
    background-color: var(--light);
    font-size: 12px;
    color: var(--dark-gray);
}

.sensor-status {
    font-weight: 500;
}

.status-good-text {
    color: var(--good);
}

.status-moderate-text {
    color: var(--moderate);
}

.status-unhealthy-text {
    color: var(--unhealthy);
}

.status-very-unhealthy-text {
    color: var(--very-unhealthy);
}

.status-hazardous-text {
    color: var(--hazardous);
}

/* Charts Tab Styles */
.chart-controls {
    background-color: var(--white);
    border-radius: 10px;
    box-shadow: var(--shadow);
    padding: 20px;
    margin-bottom: 20px;
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.control-group {
    display: flex;
    align-items: center;
}

.control-group label {
    margin-right: 10px;
    font-weight: 500;
    color: var(--dark);
}

.control-group select, 
.control-group input {
    padding: 8px 12px;
    border: 1px solid var(--light);
    border-radius: 5px;
    background-color: var(--white);
    color: var(--dark);
    font-size: 14px;
}

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

.custom-range {
    display: none;
    align-items: center;
    gap: 10px;
}

.custom-range.show {
    display: flex;
}

.download-btn {
    padding: 8px 15px;
    background-color: var(--primary);
    color: var(--white);
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 5px;
}

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

.chart-container {
    background-color: var(--white);
    border-radius: 10px;
    box-shadow: var(--shadow);
    padding: 20px;
    margin-bottom: 20px;
}

.chart-container canvas {
    width: 100% !important;
    height: 400px !important;
}

.data-table-container {
    background-color: var(--white);
    border-radius: 10px;
    box-shadow: var(--shadow);
    padding: 20px;
}

.data-table-container h3 {
    margin-bottom: 15px;
    font-size: 18px;
    color: var(--dark);
}

.data-table-container h3 i {
    margin-right: 10px;
    color: var(--primary);
}

.table-wrapper {
    overflow-x: auto;
}

#historyTable {
    width: 100%;
    border-collapse: collapse;
}

#historyTable th, 
#historyTable td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--light);
}

#historyTable th {
    background-color: var(--dark);
    color: var(--white);
    font-weight: 500;
}

#historyTable tr:hover {
    background-color: rgba(52, 152, 219, 0.05);
}

/* Map Tab Styles */
.map-container {
    background-color: var(--white);
    border-radius: 10px;
    box-shadow: var(--shadow);
    overflow: hidden;
}

.map-container h2 {
    padding: 15px 20px;
    background-color: var(--dark);
    color: var(--white);
    font-size: 18px;
    font-weight: 500;
}

.map-container h2 i {
    margin-right: 10px;
}

#sensorMap {
    height: 500px;
    width: 100%;
}

.map-info {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    padding: 20px;
}

.info-card, 
.weather-card {
    flex: 1;
    min-width: 300px;
    background-color: var(--light);
    border-radius: 8px;
    padding: 15px;
    box-shadow: var(--shadow);
}

.info-card h3, 
.weather-card h3 {
    margin-bottom: 15px;
    font-size: 16px;
    color: var(--dark);
    border-bottom: 1px solid var(--gray);
    padding-bottom: 8px;
}

.info-card p {
    margin-bottom: 8px;
    font-size: 14px;
}

.info-card p strong {
    color: var(--dark);
}

.status-active {
    color: var(--secondary);
    font-weight: 500;
}

.weather-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.weather-icon {
    font-size: 40px;
    color: var(--warning);
}

.weather-details p {
    margin-bottom: 5px;
    font-size: 14px;
}

.weather-details p strong {
    color: var(--dark);
}

/* About Tab Styles */
.about-container {
    background-color: var(--white);
    border-radius: 10px;
    box-shadow: var(--shadow);
    overflow: hidden;
}

.about-header {
    padding: 20px;
    background-color: var(--dark);
    color: var(--white);
}

.about-header h2 {
    font-size: 20px;
    font-weight: 500;
    margin-bottom: 10px;
}

.about-header h2 i {
    margin-right: 10px;
}

.about-header p {
    font-size: 14px;
    opacity: 0.9;
}

.about-content {
    padding: 20px;
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}

.about-card {
    flex: 1;
    min-width: 300px;
    background-color: var(--light);
    border-radius: 8px;
    padding: 20px;
    box-shadow: var(--shadow);
}

.about-card h3 {
    font-size: 16px;
    margin-bottom: 15px;
    color: var(--dark);
    border-bottom: 1px solid var(--gray);
    padding-bottom: 8px;
}

.about-card h3 i {
    margin-right: 10px;
}

.about-card p {
    font-size: 14px;
    margin-bottom: 10px;
    color: var(--dark-gray);
}

.team-members {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.member {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 10px;
    background-color: var(--white);
    border-radius: 8px;
    box-shadow: var(--shadow);
    width: 100%;
}

.member-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--primary);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.member-info h4 {
    font-size: 14px;
    color: var(--dark);
    margin-bottom: 5px;
}

.member-info p {
    font-size: 12px;
    color: var(--dark-gray);
    margin-bottom: 0;
}

.partner-logos {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.partner-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px;
    background-color: var(--white);
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.partner-logo i {
    font-size: 24px;
    color: var(--primary);
}

.partner-logo p {
    font-size: 12px;
    margin-bottom: 0;
}

.contact ul {
    list-style: none;
}

.contact li {
    margin-bottom: 10px;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.contact li i {
    color: var(--primary);
    width: 20px;
    text-align: center;
}

/* Footer Styles */
.app-footer {
    background-color: var(--dark);
    color: var(--white);
    padding: 15px 20px;
    font-size: 14px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-left p, 
.footer-right p {
    margin: 0;
}

.footer-right i {
    color: var(--danger);
}

/* Responsive Styles */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .last-update {
        margin-top: 10px;
    }
    
    /* Database Selector Responsive - Added */
    .database-selector {
        margin-left: 0;
        margin-top: 10px;
        width: 100%;
    }
    
    .tabs ul {
        overflow-x: auto;
        white-space: nowrap;
        padding-bottom: 5px;
    }
    
    .tabs li {
        padding: 15px 20px;
    }
    
    .status-container {
        flex-direction: column;
    }
    
    .overall-status {
        border-right: none;
        border-bottom: 1px solid var(--light);
    }
    
    .chart-controls {
        flex-direction: column;
    }
    
    .control-group {
        width: 100%;
    }
    
    .custom-range {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 480px) {
    .logo h1 {
        font-size: 16px;
    }
    
    .logo h1 span {
        display: block;
        font-size: 14px;
    }
    
    .tabs li {
        padding: 12px 15px;
        font-size: 14px;
    }
    
    .sensor-grid {
        grid-template-columns: 1fr;
    }
    
    .sensor-value {
        font-size: 32px;
    }
}