/* CSS Variables */
:root {
    /* Colors */
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary: #64748b;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #06b6d4;
    
    /* AQI Colors */
    --aqi-good: #00e400;
    --aqi-moderate: #ffff00;
    --aqi-unhealthy-sensitive: #ff7e00;
    --aqi-unhealthy: #ff0000;
    --aqi-very-unhealthy: #8f3f97;
    --aqi-hazardous: #7e0023;
    
    /* Background Colors */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    
    /* Text Colors */
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    
    /* Glassmorphism */
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-xl: 2rem;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Glassmorphism Effect */
.glassmorphism {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
}

/* Authentication Section */
.auth-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
}

.auth-container {
    width: 100%;
    max-width: 400px;
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    animation: fadeInUp 0.8s ease;
}

.auth-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.auth-header .logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.auth-header .logo i {
    font-size: 2.5rem;
    color: var(--primary);
}

.auth-header h1 {
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--info));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.auth-tabs {
    display: flex;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: 4px;
    margin-bottom: var(--spacing-lg);
}

.auth-tab {
    flex: 1;
    padding: var(--spacing-sm);
    border: none;
    background: transparent;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.3s ease;
}

.auth-tab.active {
    background: var(--primary);
    color: white;
}

.auth-form {
    display: none;
}

.auth-form.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
}

label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--text-secondary);
    font-weight: 500;
}

input, select, textarea {
    width: 100%;
    padding: var(--spacing-sm);
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.input-with-icon {
    position: relative;
}

.input-with-icon i {
    position: absolute;
    left: var(--spacing-sm);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.input-with-icon input {
    padding-left: 2.5rem;
}

.password-toggle {
    position: absolute;
    right: var(--spacing-sm);
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
}

/* Buttons */
.btn-primary {
    width: 100%;
    padding: var(--spacing-sm);
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border: none;
    border-radius: var(--radius-sm);
    color: white;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(37, 99, 235, 0.3);
}

.btn-secondary {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary);
}

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

/* Header */
.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-md);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.menu-toggle {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.2rem;
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    transition: background 0.3s ease;
}

.menu-toggle:hover {
    background: var(--glass-bg);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: 700;
    font-size: 1.2rem;
}

.header-center .current-aqi {
    text-align: center;
}

.aqi-value {
    font-size: 1.5rem;
    font-weight: 700;
    margin-right: var(--spacing-xs);
}

.aqi-category {
    font-size: 0.9rem;
    opacity: 0.8;
}

.header-right {
    display: flex;
    gap: var(--spacing-xs);
}

.header-btn {
    background: none;
    border: none;
    color: var(--text-primary);
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background 0.3s ease;
    position: relative;
}

.header-btn:hover {
    background: var(--glass-bg);
}

.notification-badge {
    position: absolute;
    top: -2px;
    right: -2px;
    background: var(--danger);
    color: white;
    border-radius: 50%;
    width: 18px;
    height: 18px;
    font-size: 0.7rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Sidebar */
.sidebar {
    position: fixed;
    top: 0;
    left: -300px;
    width: 280px;
    height: 100vh;
    z-index: 1001;
    transition: left 0.3s ease;
    overflow-y: auto;
}

.sidebar.open {
    left: 0;
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--glass-border);
}

.close-sidebar {
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
}

.sidebar-menu {
    list-style: none;
    padding: var(--spacing-md) 0;
}

.sidebar-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-primary);
    text-decoration: none;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
}

.sidebar-item:hover, .sidebar-item.active {
    background: var(--glass-bg);
    border-left-color: var(--primary);
}

/* Main Content */
.main-content {
    flex: 1;
    padding: var(--spacing-md);
    padding-bottom: 80px; /* Space for bottom nav */
}

.content-section {
    display: none;
}

.content-section.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, var(--primary), var(--info));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Bento Grid */
.bento-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.bento-item {
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.bento-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

/* AQI Cards */
.main-aqi-card {
    grid-column: span 2;
    text-align: center;
}

.aqi-display {
    margin-bottom: var(--spacing-md);
}

.aqi-number {
    font-size: 4rem;
    font-weight: 700;
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

.aqi-category-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-xl);
    font-weight: 600;
    font-size: 1.1rem;
}

.aqi-progress {
    margin-bottom: var(--spacing-md);
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--bg-secondary);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: var(--spacing-xs);
}

.progress-fill {
    height: 100%;
    border-radius: 4px;
    transition: width 0.5s ease;
}

.aqi-scale {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Weather Cards */
.weather-card {
    text-align: center;
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-sm);
}

.card-header i {
    font-size: 1.5rem;
    color: var(--info);
}

.card-header h3 {
    font-size: 1rem;
    color: var(--text-secondary);
}

.card-value {
    font-size: 2rem;
    font-weight: 700;
}

/* Health Alert */
.health-alert {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-xl);
    border-left: 4px solid var(--warning);
}

.alert-icon {
    font-size: 2rem;
    color: var(--warning);
}

.alert-content h4 {
    margin-bottom: var(--spacing-xs);
    color: var(--warning);
}

/* Section Cards */
.section-card {
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-xl);
}

.section-card .card-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.section-card .card-header h2 {
    font-size: 1.5rem;
    margin: 0;
}

.section-card .card-body {
    padding: var(--spacing-lg);
}

/* Pollutant Grid */
.pollutant-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.pollutant-item {
    background: var(--bg-secondary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    text-align: center;
}

.pollutant-name {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.pollutant-value {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.pollutant-unit {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Map */
.map-container {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    height: 500px;
    margin-bottom: var(--spacing-lg);
}

#aqiMap {
    width: 100%;
    height: 100%;
}

.map-controls {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.map-control-btn {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.3s ease;
}

.map-control-btn:hover {
    background: var(--primary);
}

/* Map Legend */
.map-legend {
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
}

.map-legend h4 {
    margin-bottom: var(--spacing-md);
}

.legend-items {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-sm);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.legend-color {
    width: 20px;
    height: 20px;
    border-radius: var(--radius-sm);
}

/* AQI Color Classes */
.aqi-good { background: var(--aqi-good); }
.aqi-moderate { background: var(--aqi-moderate); }
.aqi-unhealthy-sensitive { background: var(--aqi-unhealthy-sensitive); }
.aqi-unhealthy { background: var(--aqi-unhealthy); }
.aqi-very-unhealthy { background: var(--aqi-very-unhealthy); }
.aqi-hazardous { background: var(--aqi-hazardous); }

/* Form Styles */
.complaint-form-container {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
}

.location-input {
    display: flex;
    gap: var(--spacing-sm);
}

.location-input input {
    flex: 1;
}

.location-btn {
    background: var(--primary);
    border: none;
    color: white;
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background 0.3s ease;
}

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

.location-map {
    height: 200px;
    margin-top: var(--spacing-sm);
    border-radius: var(--radius-md);
    overflow: hidden;
    display: none;
}

.location-coordinates {
    margin-top: var(--spacing-xs);
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* Camera Section */
.camera-section {
    margin-top: var(--spacing-sm);
}

.camera-preview {
    width: 100%;
    height: 300px;
    background: var(--bg-secondary);
    border: 2px dashed var(--glass-border);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    overflow: hidden;
}

.camera-placeholder {
    text-align: center;
    color: var(--text-muted);
}

.camera-placeholder i {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.camera-controls {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.photo-preview {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: var(--spacing-sm);
}

.photo-item {
    position: relative;
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.photo-item img {
    width: 100%;
    height: 100px;
    object-fit: cover;
}

.photo-remove {
    position: absolute;
    top: 4px;
    right: 4px;
    background: var(--danger);
    color: white;
    border: none;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 0.8rem;
}

/* AR Scope */
.ar-container {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
}

.ar-preview {
    position: relative;
    width: 100%;
    height: 400px;
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-bottom: var(--spacing-lg);
}

#arVideo {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.ar-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.ar-controls {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

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

.smog-control label {
    min-width: 120px;
    margin: 0;
}

.smog-control input {
    flex: 1;
}

.ar-buttons {
    display: flex;
    gap: var(--spacing-sm);
}

/* Breathing Exercise */
.gamification-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: start;
}

.breathing-exercise {
    text-align: center;
    padding: var(--spacing-xl);
}

.breathing-circle {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--info));
    margin: 0 auto var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: breathe 4s ease-in-out infinite;
}

.breathing-text {
    text-align: center;
    color: white;
}

#breathInstruction {
    display: block;
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.timer {
    font-size: 1.5rem;
    font-weight: 700;
}

.breathing-controls {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
}

/* Badges */
.badges-section {
    padding: var(--spacing-lg);
}

.badges-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

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

.badge-icon {
    width: 60px;
    height: 60px;
    background: var(--bg-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-xs);
    font-size: 1.5rem;
}

.badge-item.locked .badge-icon {
    opacity: 0.5;
    filter: grayscale(1);
}

.badge-name {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    display: flex;
    justify-content: space-around;
    padding: var(--spacing-sm);
    z-index: 1000;
    display: none;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-xs);
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
    flex: 1;
    max-width: 80px;
}

.nav-item.active {
    color: var(--primary);
    background: var(--glass-bg);
}

.nav-item i {
    font-size: 1.2rem;
    margin-bottom: 4px;
}

.nav-item span {
    font-size: 0.7rem;
}

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

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

@keyframes breathe {
    0%, 100% {
        transform: scale(1);
        opacity: 0.7;
    }
    50% {
        transform: scale(1.1);
        opacity: 1;
    }
}

/* Loading Spinner */
.btn-spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid transparent;
    border-top: 2px solid currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-right: 8px;
    vertical-align: middle;
    display: none;
}

.btn-primary.loading .btn-spinner {
    display: inline-block;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .bento-grid {
        grid-template-columns: 1fr;
    }
    
    .main-aqi-card {
        grid-column: span 1;
    }
    
    .gamification-container {
        grid-template-columns: 1fr;
    }
    
    .sidebar {
        width: 100%;
        left: -100%;
    }
    
    .bottom-nav {
        display: flex;
    }
    
    .header-center {
        display: none;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .section-header h1 {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .auth-container {
        padding: var(--spacing-lg);
    }
    
    .main-content {
        padding: var(--spacing-sm);
    }
    
    .bento-item {
        padding: var(--spacing-md);
    }
    
    .aqi-number {
        font-size: 3rem;
    }
}

/* Utility Classes */
.text-center { text-align: center; }
.mb-0 { margin-bottom: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.hidden { display: none; }

/* AOS Overrides */
[data-aos] {
    pointer-events: none;
}
[data-aos].aos-animate {
    pointer-events: auto;
}