/* CSS Variables for Modern Design */
:root {
    --primary: #125af5;
    --primary-light: #3b67ae;
    --primary-dark: #1d4ed8;
    --secondary: #64748b;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #06b6d4;
    --offline: #6b7280;
    --inactive: #9ca3af;
    
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    
    --white: #ffffff;
    --black: #000000;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    --radius-sm: 0.375rem;
    --radius: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--gray-50);
    color: var(--gray-900);
    line-height: 1.6;
    font-size: 14px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-width: 1200px;
}

/* Login Page Styles */
.login-container {
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
}

.login-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    padding: var(--spacing-2xl);
    width: 100%;
    max-width: 400px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.login-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--info), var(--primary));
}

.login-header {
    margin-bottom: var(--spacing-2xl);
}

.login-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    color: var(--white);
    margin: 0 auto var(--spacing-lg);
    box-shadow: var(--shadow-md);
}

.login-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-sm);
    font-family: "Raleway", sans-serif;
}

.login-subtitle {
    font-size: 16px;
    color: var(--gray-600);
    font-weight: 400;
}

.login-form {
    margin-bottom: var(--spacing-xl);
}

.form-group {
    margin-bottom: var(--spacing-lg);
    text-align: left;
}

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: var(--spacing-sm);
}

.form-input {
    width: 100%;
    padding: var(--spacing-lg);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    font-size: 16px;
    transition: var(--transition);
    background: var(--white);
    color: var(--gray-900);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(18, 90, 245, 0.1);
}

.form-input.error {
    border-color: var(--danger);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.login-button {
    width: 100%;
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: var(--white);
    border: none;
    border-radius: var(--radius-lg);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.login-button:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.login-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.login-button.loading {
    position: relative;
    color: transparent;
}

.login-button.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top: 2px solid var(--white);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.error-message {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--danger);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    margin-top: var(--spacing-md);
    font-size: 14px;
    text-align: center;
    display: none;
}

.error-message.show {
    display: block;
    animation: slideIn 0.3s ease-out;
}

.demo-credentials {
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-top: var(--spacing-xl);
    border: 1px solid var(--gray-200);
}

.demo-credentials h4 {
    font-size: 14px;
    color: var(--gray-700);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.demo-credentials p {
    font-size: 12px;
    color: var(--gray-600);
    margin: 2px 0;
}

.logout-button {
    position: fixed;
    top: var(--spacing-xl);
    right: var(--spacing-xl);
    background: rgba(255, 255, 255, 0.2);
    color: var(--white);
    border: 1px solid rgba(255, 255, 255, 0.3);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-lg);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    backdrop-filter: blur(10px);
    z-index: 10000;
}

.logout-button:hover {
    background: rgba(255, 255, 255, 0.3);
}

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

/* Modern Header */
.app-header {
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    padding: var(--spacing-lg) var(--spacing-xl);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10%);
    background: rgba(28, 106, 231, 0.95);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    font-family: "Raleway", sans-serif;
    font-style: italic;
}

.header-content {
    max-width: 1600px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.brand-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.brand-text h1 {
    font-size: 24px;
    font-weight: 700;
    color: white;
    margin-bottom: 2px;
}

.brand-text p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 400;
}

.header-stats {
    display: flex;
    gap: var(--spacing-xl);
}

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

.stat-value {
    display: block;
    font-size: 24px;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1;
}

.stat-label {
    font-size: 11px;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-family: "Raleway", sans-serif;
    font-style: italic;
}

/* Main Dashboard */
.dashboard-main {
    flex: 1;
    max-width: 1600px;
    margin: 0 auto;
    padding: var(--spacing-xl);
    display: grid;
    gap: var(--spacing-xl);
    grid-template-columns: 1fr;
    width: 95%;
}

/* Enhanced Alert Section */
.alert-section {
    grid-column: 1 / -1;
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    border: 2px solid var(--gray-600);
    display: none;
    position: relative;
    overflow: hidden;
}

.alert-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--info), var(--primary));
    animation: alertPulse 2s ease-in-out infinite;
}

.alert-section.show {
    display: block;
}

.alert-section.critical {
    background: linear-gradient(135deg, #7f1d1d 0%, #991b1b 100%);
    border-color: var(--danger);
    box-shadow: 0 0 30px rgba(239, 68, 68, 0.3);
}

.alert-section.critical::before {
    background: linear-gradient(90deg, var(--danger), #fca5a5, var(--danger));
}

.alert-section.warning {
    background: linear-gradient(135deg, #78350f 0%, #92400e 100%);
    border-color: var(--warning);
    box-shadow: 0 0 30px rgba(245, 158, 11, 0.3);
}

.alert-section.warning::before {
    background: linear-gradient(90deg, var(--warning), #fcd34d, var(--warning));
}

.alert-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
}

.alert-title-section {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.alert-icon {
    font-size: 32px;
    color: var(--white);
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.3));
}

.alert-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--white);
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.alert-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    font-size: 12px;
    font-weight: 600;
    color: var(--white);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.alert-message {
    color: rgba(255, 255, 255, 0.9);
    font-size: 16px;
    line-height: 1.6;
    text-shadow: 0 1px 2px rgba(0,0,0,0.3);
    background: rgba(255, 255, 255, 0.1);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Map Section */
.map-section {
    grid-column: 1 / -1;
    position: relative;
    z-index: 1;
}

.map-container {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
}

.map-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
}

.map-header h3 {
    font-size: 20px;
    font-weight: 600;
    color: rgba(29, 60, 217, 0.525);
    font-family: "Raleway", sans-serif;
    font-style: italic;
}

.map-legend {
    display: flex;
    gap: var(--spacing-lg);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 12px;
    color: var(--gray-600);
    font-weight: 500;
}

.legend-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.legend-dot.operational {
    background: var(--success);
}

.legend-dot.critical {
    background: var(--danger);
}

.legend-dot.inactive {
    background: var(--inactive);
}

.map-view {
    height: 600px;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    position: relative;
    z-index: 1;
}

.map-info {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    text-align: center;
    font-size: 12px;
    color: var(--gray-600);
}

/* Sensor Data Section */
.sensor-section {
    grid-column: 1 / -1;
}

.sensor-container {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
}

.sensor-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
}

.sensor-header h3 {
    font-size: 20px;
    font-weight: 600;
    color: rgba(93, 138, 211, 0.95);
    font-family: "Raleway", sans-serif;
    font-style: italic;
}

.sensor-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(107, 114, 128, 0.1);
    color: var(--offline);
    border-radius: var(--radius-lg);
    font-size: 12px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.status-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: currentColor;
    animation: pulse 2s infinite;
}

.sensor-metrics {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.sensor-metric {
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--gray-50);
    border-radius: var(--radius-xl);
    transition: var(--transition);
    aspect-ratio: 2;
    display: flex;
    flex-direction: column;
    justify-content: center;
    max-height: 120px;
    min-height: 20px;
}

.sensor-metric:hover {
    background: var(--gray-100);
    transform: translateY(-2px);
}

.metric-icon {
    font-size: 28px;
    margin-bottom: var(--spacing-md);
    color: var(--primary);
}

.metric-data {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 4px;
    margin-bottom: var(--spacing-xs);
}

.metric-value {
    font-size: 14px;
    font-weight: 700;
    color: var(--gray-900);
    font-variant-numeric: tabular-nums;
}

.metric-unit {
    font-size: 14px;
    color: var(--gray-500);
    font-weight: 500;
}

.metric-label {
    font-size: 12px;
    color: var(--gray-500);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.sensor-footer {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    text-align: center;
    font-size: 12px;
    color: var(--gray-600);
}

.sensor-footer div {
    margin-bottom: var(--spacing-sm);
}

.sensor-footer div:last-child {
    margin-bottom: 0;
}

/* Charts Page */
.charts-page {
    display: none;
    grid-column: 1 / -1;
}

.charts-page.active {
    display: block;
}

.charts-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
}

.back-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--gray-100);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    color: var(--gray-700);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.back-btn:hover {
    background: var(--gray-200);
    color: var(--gray-800);
}

.charts-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
}

.chart-container {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
    aspect-ratio: 1;
}

/* Add to your existing chart styles */
.chart-container .chart-content {
    position: relative;
    height: 350px;
}

/* Ensure proper spacing for the new chart */
.charts-grid {
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-xl);
}

.chart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.chart-header h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--gray-900);
}

.chart-controls {
    display: flex;
    gap: var(--spacing-sm);
    background: var(--gray-100);
    padding: 4px;
    border-radius: var(--radius-lg);
}

.chart-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    background: transparent;
    color: var(--gray-600);
    font-size: 14px;
    font-weight: 500;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
}

.chart-btn:hover {
    background: var(--gray-200);
}

.chart-btn.active {
    background: var(--white);
    color: var(--primary);
    box-shadow: var(--shadow-sm);
}

.chart-content {
    position: relative;
    height: 350px;
}

.chart-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: var(--transition);
    pointer-events: none;
}

.chart-canvas.active {
    opacity: 1;
    pointer-events: auto;
}

/* Connection Status */
.connection-status {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--offline);
    color: var(--white);
    border-radius: var(--radius-xl);
    font-size: 14px;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    transition: var(--transition);
}

.connection-status.connected {
    background: var(--success);
}

.connection-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: currentColor;
    animation: pulse 2s infinite;
}

/* Custom Leaflet Marker Styles */
.custom-marker {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 3px solid white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 16px;
    color: white;
    box-shadow: var(--shadow-md);
    cursor: pointer;
    transition: var(--transition);
}

.custom-marker:hover {
    transform: scale(1.1);
}

.custom-marker.operational {
    background: var(--success);
}

.custom-marker.critical {
    background: var(--danger);
    animation: pulse 2s infinite;
}

.custom-marker.inactive {
    background: var(--inactive);
}

/* Custom Popup Styles */
.leaflet-popup-content-wrapper {
    background: var(--white) !important;
    border-radius: var(--radius-xl) !important;
    box-shadow: var(--shadow-xl) !important;
    border: 2px solid var(--gray-200) !important;
    padding: 0 !important;
}

.leaflet-popup-content {
    margin: 0 !important;
    padding: var(--spacing-lg) !important;
    max-width: 500px !important;
    min-width: 450px !important;
}

.leaflet-popup-tip {
    background: var(--white) !important;
    border: 2px solid var(--gray-200) !important;
}

.popup-chart-btn {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: var(--white);
    border: none;
    border-radius: var(--radius-lg);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    margin-top: var(--spacing-md);
}

.popup-chart-btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.popup-values-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
    margin: var(--spacing-md) 0;
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
}

.popup-value-box {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(0,0,0,0.05);
    transition: var(--transition);
}

.popup-value-box:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.popup-value {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 4px;
}

.popup-label {
    font-size: 11px;
    color: var(--gray-500);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* New Footer Styles */
.app-footer {
    background: linear-gradient(135deg, #a685e0, var(--primary-light));
    color: var(--white);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-xl);
    font-size: 12px;
    font-weight: 600;
    text-align: center;
    margin-top: var(--spacing-xl);
    width: 100%;
    box-shadow: var(--shadow-lg);
    line-height: 1.4;
}

.footer-content {
    max-width: 1600px;
    margin: 0 auto;
}

.footer-content .company {
    font-size: 14px;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    letter-spacing: 1px;
}

.footer-content .company a {
    color: var(--white);
    text-decoration: none;
}

.footer-content .contact {
    font-size: 10px;
    opacity: 0.9;
}

.footer-content .contact a {
    color: var(--white);
    text-decoration: none;
}

/* Hide/Show Classes */
.hidden {
    display: none !important;
}

.show {
    display: block !important;
}

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

@keyframes alertPulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

@keyframes spin {
    from {
        transform: translate(-50%, -50%) rotate(0deg);
    }
    to {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

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

/* Map z-index fix */
.leaflet-control-container {
    z-index: 999 !important;
}

.leaflet-popup {
    z-index: 1001 !important;
}

/* Responsive Design */
@media (max-width: 1400px) {
    .charts-grid {
        grid-template-columns: 1fr;
    }
    
    .sensor-metrics {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 1200px) {
    body {
        min-width: auto;
    }
    
    .dashboard-main {
        padding: var(--spacing-lg);
    }
    
    .header-stats {
        gap: var(--spacing-lg);
    }
}

@media (max-width: 768px) {
    .login-container {
        padding: var(--spacing-lg);
    }

    .login-card {
        padding: var(--spacing-xl);
    }

    .app-header {
        padding: var(--spacing-md) var(--spacing-lg);
    }
    
    .header-content {
        flex-direction: column;
        gap: var(--spacing-lg);
        text-align: center;
    }
    
    .brand {
        flex-direction: column;
        text-align: center;
    }
    
    .dashboard-main {
        padding: var(--spacing-md);
        gap: var(--spacing-lg);
    }
    
    .sensor-metrics {
        grid-template-columns: 1fr;
    }
    
    .chart-header {
        flex-direction: column;
        gap: var(--spacing-md);
        align-items: stretch;
    }
    
    .map-header {
        flex-direction: column;
        gap: var(--spacing-md);
        align-items: stretch;
    }
    
    .connection-status {
        bottom: var(--spacing-md);
        right: var(--spacing-md);
    }

    .popup-values-grid {
        grid-template-columns: 1fr;
    }

    .logout-button {
        top: var(--spacing-lg);
        right: var(--spacing-lg);
    }
}