/* StudyBuddy AI - Main Stylesheet */

/* CSS Variables for theming */
:root {
    /* Colors */
    --primary-color: #1e3a8a;
    --secondary-color: #f59e0b;
    --accent-color: #10b981;
    --background-color: #f8fafc;
    --surface-color: #ffffff;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --border-color: #e5e7eb;
    --shadow-light: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-large: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
    --gradient-secondary: linear-gradient(135deg, #f59e0b 0%, #fbbf24 100%);
    --gradient-accent: linear-gradient(135deg, #10b981 0%, #34d399 100%);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Transitions */
    --transition-fast: 0.15s ease-out;
    --transition-normal: 0.3s ease-out;
    --transition-slow: 0.5s ease-out;
    
    /* Z-index layers */
    --z-dropdown: 1000;
    --z-modal: 1050;
    --z-toast: 1100;
}

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

html {
    font-size: 16px;
    line-height: 1.5;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--background-color);
    color: var(--text-primary);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Screen Management */
.screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: var(--background-color);
    transform: translateX(100%);
    transition: transform var(--transition-normal);
    overflow-y: auto;
    z-index: 1;
}

.screen.active {
    transform: translateX(0);
}

.screen.slide-out {
    transform: translateX(-100%);
}

/* Loading Screen */
#loading-screen {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    color: white;
}

.loading-container {
    text-align: center;
    padding: var(--spacing-xl);
}

.app-logo {
    font-size: 4rem;
    margin-bottom: var(--spacing-lg);
    animation: bounce 2s infinite;
}

.loading-container h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.loading-container p {
    font-size: 1.125rem;
    opacity: 0.9;
    margin-bottom: var(--spacing-xl);
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top: 4px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

/* Header Styles */
.app-header {
    background: var(--gradient-primary);
    color: white;
    padding: var(--spacing-lg) var(--spacing-md);
    box-shadow: var(--shadow-medium);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

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

.app-title .logo {
    font-size: 2rem;
}

.app-title h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.app-title p {
    font-size: 0.875rem;
    opacity: 0.9;
}

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

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

.stat-number {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
}

.stat-label {
    font-size: 0.75rem;
    opacity: 0.8;
}

/* Screen Headers */
.screen-header, .camera-header, .analysis-header {
    display: flex;
    align-items: center;
    padding: var(--spacing-lg) var(--spacing-md);
    background: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-light);
}

.back-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-primary);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast);
    margin-right: var(--spacing-md);
}

.back-btn:hover {
    background-color: var(--border-color);
}

.screen-header h2, .camera-header h2, .analysis-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
    flex: 1;
}

.gallery-btn {
    background: none;
    border: none;
    font-size: 1.25rem;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.gallery-btn:hover {
    background-color: var(--border-color);
}

/* Main Content */
.main-content {
    padding: var(--spacing-lg) var(--spacing-md);
    max-width: 1200px;
    margin: 0 auto;
}

/* Stats Bar */
.stats-bar {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.stat-card {
    background: var(--surface-color);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-light);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.stat-icon {
    font-size: 1.5rem;
}

.stat-info {
    flex: 1;
}

.stat-value {
    display: block;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-title {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Metrics Panel */
.metrics-panel {
    background: var(--surface-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-light);
    display: grid;
    grid-template-columns: 1fr auto;
    gap: var(--spacing-xl);
    align-items: center;
}

.progress-section h3, .accuracy-section h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.progress-bar {
    position: relative;
    height: 8px;
    background-color: var(--border-color);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--gradient-accent);
    border-radius: var(--radius-sm);
    transition: width var(--transition-slow);
}

.progress-text {
    position: absolute;
    top: -25px;
    right: 0;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
}

.circular-progress {
    position: relative;
    display: inline-block;
}

.progress-circle {
    transition: stroke-dashoffset var(--transition-slow);
    transform: rotate(-90deg);
    transform-origin: 50% 50%;
}

.circle-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* Action Grid */
.action-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.action-card {
    background: var(--surface-color);
    border: none;
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-light);
    position: relative;
    overflow: hidden;
}

.action-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-large);
}

.action-card.primary {
    background: var(--gradient-primary);
    color: white;
}

.action-card.primary:hover {
    transform: translateY(-4px) scale(1.02);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-lg);
}

.action-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.action-card p {
    font-size: 0.875rem;
    opacity: 0.8;
    line-height: 1.4;
}

/* Recent Activity */
.recent-activity {
    background: var(--surface-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-light);
}

.recent-activity h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
}

.activity-list {
    min-height: 150px;
}

.empty-state {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-secondary);
}

.empty-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.5;
}

.empty-subtitle {
    font-size: 0.875rem;
    margin-top: var(--spacing-sm);
}

.activity-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast);
    cursor: pointer;
}

.activity-item:hover {
    background-color: var(--background-color);
}

.activity-icon {
    font-size: 1.5rem;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-accent);
    border-radius: var(--radius-md);
    color: white;
}

.activity-info h4 {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.activity-time {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Camera Styles */
.camera-container {
    position: relative;
    height: calc(100vh - 80px);
    background: black;
}

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

.camera-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.3);
    color: white;
    pointer-events: none;
}

.capture-guide {
    text-align: center;
}

.guide-box {
    width: 280px;
    height: 200px;
    border: 2px solid white;
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.guide-box::before {
    content: '';
    position: absolute;
    top: -8px;
    left: -8px;
    right: -8px;
    bottom: -8px;
    border: 2px solid rgba(255, 255, 255, 0.5);
    border-radius: var(--radius-lg);
}

.camera-controls {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.control-btn {
    width: 50px;
    height: 50px;
    border: none;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    font-size: 1.25rem;
    cursor: pointer;
    transition: background-color var(--transition-fast);
    backdrop-filter: blur(10px);
}

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

.capture-btn {
    width: 80px;
    height: 80px;
    border: 4px solid white;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    cursor: pointer;
    transition: transform var(--transition-fast);
    backdrop-filter: blur(10px);
    position: relative;
}

.capture-btn:hover {
    transform: scale(1.05);
}

.capture-inner {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: white;
    margin: 6px auto;
    transition: transform var(--transition-fast);
}

.capture-btn:active .capture-inner {
    transform: scale(0.9);
}

.camera-error {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--surface-color);
}

.error-content {
    text-align: center;
    padding: var(--spacing-xl);
    max-width: 400px;
}

.error-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.5;
}

.error-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.error-content p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

.retry-btn, .gallery-fallback-btn {
    display: block;
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.retry-btn {
    background: var(--gradient-primary);
    color: white;
}

.retry-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.gallery-fallback-btn {
    background: var(--border-color);
    color: var(--text-primary);
}

.gallery-fallback-btn:hover {
    background: var(--text-light);
}

/* Analysis Screen Styles */
.analysis-loading {
    padding: var(--spacing-2xl);
    text-align: center;
}

.loading-steps {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
    max-width: 300px;
    margin-left: auto;
    margin-right: auto;
}

.step-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    background: var(--border-color);
    opacity: 0.5;
    transition: all var(--transition-normal);
}

.step-item.active {
    background: var(--accent-color);
    color: white;
    opacity: 1;
    transform: scale(1.02);
}

.step-item.completed {
    background: var(--gradient-accent);
    color: white;
    opacity: 1;
}

.step-icon {
    font-size: 1.25rem;
    width: 30px;
    text-align: center;
}

.processing-animation {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100px;
}

.pulse-circle {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--gradient-primary);
    animation: pulse 2s ease-in-out infinite;
}

/* Analysis Results */
.analysis-results {
    padding: var(--spacing-lg) var(--spacing-md);
}

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

.image-preview img {
    max-width: 100%;
    max-height: 200px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-medium);
}

.recognized-text {
    background: var(--surface-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-light);
}

.recognized-text h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.text-content {
    background: var(--background-color);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    font-family: 'Courier New', monospace;
    font-size: 0.875rem;
    line-height: 1.6;
    border-left: 4px solid var(--accent-color);
}

/* Solution Tabs */
.solution-tabs {
    background: var(--surface-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-light);
    margin-bottom: var(--spacing-xl);
}

.tab-headers {
    display: flex;
    border-bottom: 1px solid var(--border-color);
}

.tab-btn {
    flex: 1;
    padding: var(--spacing-lg);
    border: none;
    background: none;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    border-bottom: 2px solid transparent;
}

.tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
    background: var(--background-color);
}

.tab-btn:hover {
    color: var(--primary-color);
}

.tab-content {
    display: none;
    padding: var(--spacing-xl);
}

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

.solution-content {
    line-height: 1.6;
}

.solution-content h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
}

.solution-content p {
    margin-bottom: var(--spacing-md);
}

.solution-content ul, .solution-content ol {
    margin-left: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.solution-content li {
    margin-bottom: var(--spacing-sm);
}

.solution-content code {
    background: var(--background-color);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-family: 'Courier New', monospace;
    font-size: 0.875rem;
}

.solution-content pre {
    background: var(--background-color);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    overflow-x: auto;
    margin-bottom: var(--spacing-md);
}

/* Action Buttons */
.action-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
}

.action-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    background: var(--border-color);
    color: var(--text-primary);
}

.action-btn.primary {
    background: var(--gradient-primary);
    color: white;
}

.action-btn.secondary {
    background: var(--gradient-secondary);
    color: white;
}

.action-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

/* Analytics Screen */
.analytics-content {
    padding: var(--spacing-lg) var(--spacing-md);
}

.progress-chart {
    background: var(--surface-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-light);
    text-align: center;
}

.progress-chart h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
}

#progress-canvas {
    max-width: 100%;
    height: auto;
}

.subject-mastery {
    background: var(--surface-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-light);
}

.subject-mastery h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
}

.mastery-bar {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.mastery-label {
    min-width: 80px;
    font-size: 0.875rem;
    font-weight: 500;
}

.mastery-progress {
    flex: 1;
    height: 8px;
    background: var(--border-color);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.mastery-fill {
    height: 100%;
    background: var(--gradient-accent);
    border-radius: var(--radius-sm);
    transition: width var(--transition-slow);
}

.mastery-percentage {
    min-width: 40px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.statistics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-lg);
}

.stat-box {
    background: var(--surface-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    box-shadow: var(--shadow-light);
    transition: transform var(--transition-fast);
}

.stat-box:hover {
    transform: translateY(-2px);
}

.stat-box .stat-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
}

.stat-box .stat-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.stat-box .stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Challenge Mode */
.challenge-content {
    padding: var(--spacing-lg) var(--spacing-md);
}

.difficulty-selector {
    margin-bottom: var(--spacing-xl);
}

.difficulty-selector h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

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

.difficulty-btn {
    background: var(--surface-color);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.difficulty-btn:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.difficulty-btn.selected {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, var(--primary-color) 0%, #3b82f6 100%);
    color: white;
}

.difficulty-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
}

.difficulty-btn span {
    display: block;
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.difficulty-btn p {
    font-size: 0.875rem;
    opacity: 0.8;
}

.challenge-problem {
    background: var(--surface-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-light);
}

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

#challenge-timer {
    font-size: 2rem;
    font-weight: 700;
    color: var(--secondary-color);
    background: var(--background-color);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-lg);
    display: inline-block;
}

.problem-content {
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
}

.challenge-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
}

/* Deep Dive Learning */
.deep-dive-content {
    padding: var(--spacing-lg) var(--spacing-md);
}

.concept-explorer {
    background: var(--surface-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-light);
}

.concept-explorer h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
}

.search-bar {
    display: flex;
    gap: var(--spacing-md);
}

#concept-search {
    flex: 1;
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: border-color var(--transition-fast);
}

#concept-search:focus {
    outline: none;
    border-color: var(--primary-color);
}

#search-concepts-btn {
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    background: var(--gradient-primary);
    color: white;
    font-size: 1rem;
    cursor: pointer;
    transition: transform var(--transition-fast);
}

#search-concepts-btn:hover {
    transform: translateY(-2px);
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: var(--z-toast);
}

.toast {
    background: var(--surface-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-large);
    border-left: 4px solid var(--accent-color);
    animation: slideInRight 0.3s ease-out, fadeOut 0.3s ease-out 4.7s forwards;
    max-width: 300px;
}

.toast.error {
    border-left-color: #ef4444;
}

.toast.warning {
    border-left-color: var(--secondary-color);
}

.toast-content {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
}

.toast-icon {
    font-size: 1.25rem;
}

.toast-text h4 {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.toast-text p {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Install Prompt */
.install-prompt {
    position: fixed;
    bottom: 20px;
    left: 20px;
    right: 20px;
    background: var(--surface-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-large);
    z-index: var(--z-modal);
    animation: slideInUp 0.3s ease-out;
}

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

.prompt-icon {
    font-size: 2rem;
}

.prompt-content h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.prompt-content p {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.prompt-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-left: auto;
}

.install-btn, .dismiss-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.install-btn {
    background: var(--gradient-primary);
    color: white;
}

.dismiss-btn {
    background: var(--border-color);
    color: var(--text-primary);
}

.install-btn:hover, .dismiss-btn:hover {
    transform: translateY(-1px);
}

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

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

@keyframes pulse {
    0% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.2);
        opacity: 0.7;
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideInUp {
    from {
        transform: translateY(100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes fadeOut {
    to {
        opacity: 0;
        transform: translateX(100%);
    }
}

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

.visible {
    display: block !important;
}

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

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

.text-right {
    text-align: right;
}

.font-bold {
    font-weight: 700;
}

.font-semibold {
    font-weight: 600;
}

.text-primary {
    color: var(--primary-color);
}

.text-secondary {
    color: var(--text-secondary);
}

.text-accent {
    color: var(--accent-color);
}

.bg-primary {
    background: var(--gradient-primary);
}

.bg-secondary {
    background: var(--gradient-secondary);
}

.bg-accent {
    background: var(--gradient-accent);
}

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for keyboard navigation */
button:focus,
input:focus,
.action-card:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --border-color: #000000;
        --text-secondary: #000000;
        --shadow-light: 0 1px 3px 0 rgba(0, 0, 0, 0.3);
        --shadow-medium: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
        --shadow-large: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
    }
}

/* PWA Styles */
.install-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 6px;
    margin-right: 15px;
}

.install-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

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

/* Notification Styles */
.notification, .update-notification, .success-notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--bg-color);
    border: 2px solid var(--primary-color);
    border-radius: 12px;
    box-shadow: var(--shadow-medium);
    z-index: 10000;
    max-width: 400px;
    animation: slideIn 0.3s ease;
}

.update-notification {
    border-color: var(--warning-color);
    background: #fff3cd;
}

.success-notification {
    border-color: var(--success-color);
    background: #d4edda;
}

.notification-content {
    padding: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.notification-content span {
    flex: 1;
    font-weight: 500;
}

.notification-content button {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 6px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background 0.3s ease;
}

.notification-content button:hover {
    background: var(--primary-dark);
}

.update-notification .notification-content button {
    background: var(--warning-color);
}

.update-notification .notification-content button:hover {
    background: #e17c08;
}

.success-notification .notification-content button {
    background: var(--success-color);
}

.success-notification .notification-content button:hover {
    background: #38a169;
}

/* Network Status Indicator */
.network-status {
    position: fixed;
    bottom: 20px;
    left: 20px;
    padding: 8px 12px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    z-index: 1000;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.network-status.online {
    background: rgba(72, 187, 120, 0.1);
    color: var(--success-color);
    border: 1px solid rgba(72, 187, 120, 0.3);
}

.network-status.offline {
    background: rgba(245, 101, 101, 0.1);
    color: var(--error-color);
    border: 1px solid rgba(245, 101, 101, 0.3);
}

/* PWA Animation */
@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* PWA Specific Styles */
@media (display-mode: standalone) {
    /* Hide certain elements when app is installed */
    .install-btn {
        display: none !important;
    }
    
    /* Add safe area insets for devices with notches */
    .app-header {
        padding-top: calc(20px + env(safe-area-inset-top));
    }
}

/* Mobile PWA Styles */
@media (max-width: 768px) {
    .notification, .update-notification, .success-notification {
        top: 10px;
        left: 10px;
        right: 10px;
        max-width: none;
    }
    
    .network-status {
        bottom: 10px;
        left: 10px;
    }
    
    .install-btn {
        font-size: 0.8rem;
        padding: 6px 12px;
        margin-right: 10px;
    }
}