/* StudyBuddy AI - Mobile Responsive Styles */

/* Mobile First - Base styles are mobile optimized */

/* Small screens (phones in portrait) */
@media (max-width: 480px) {
    .header-content {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    .app-title {
        justify-content: center;
    }
    
    .stats-bar {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }
    
    .stat-card {
        padding: var(--spacing-md);
    }
    
    .metrics-panel {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
        text-align: center;
    }
    
    .action-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .action-card {
        padding: var(--spacing-lg);
    }
    
    .card-icon {
        font-size: 2.5rem;
    }
    
    .camera-controls {
        bottom: 20px;
        gap: var(--spacing-lg);
    }
    
    .control-btn {
        width: 45px;
        height: 45px;
        font-size: 1.125rem;
    }
    
    .capture-btn {
        width: 70px;
        height: 70px;
    }
    
    .capture-inner {
        width: 50px;
        height: 50px;
    }
    
    .guide-box {
        width: 250px;
        height: 180px;
    }
    
    .tab-headers {
        flex-direction: column;
    }
    
    .tab-btn {
        border-bottom: none;
        border-right: 2px solid transparent;
    }
    
    .tab-btn.active {
        border-right-color: var(--primary-color);
        border-bottom-color: transparent;
    }
    
    .action-buttons {
        grid-template-columns: 1fr;
    }
    
    .difficulty-buttons {
        grid-template-columns: 1fr;
    }
    
    .statistics-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
    
    .stat-box {
        padding: var(--spacing-md);
    }
    
    .stat-box .stat-icon {
        font-size: 1.5rem;
    }
    
    .stat-box .stat-value {
        font-size: 1.25rem;
    }
    
    .challenge-actions {
        flex-direction: column;
    }
    
    .search-bar {
        flex-direction: column;
    }
    
    .install-prompt {
        left: 10px;
        right: 10px;
        bottom: 10px;
    }
    
    .prompt-content {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-lg);
    }
    
    .prompt-actions {
        margin-left: 0;
        justify-content: center;
    }
    
    .toast-container {
        left: 10px;
        right: 10px;
        top: 10px;
    }
    
    .toast {
        max-width: none;
    }
}

/* Medium screens (phones in landscape, small tablets) */
@media (min-width: 481px) and (max-width: 768px) {
    .stats-bar {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .action-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .statistics-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .difficulty-buttons {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .camera-controls {
        bottom: 30px;
    }
    
    .guide-box {
        width: 320px;
        height: 220px;
    }
    
    .metrics-panel {
        grid-template-columns: 2fr 1fr;
    }
}

/* Large tablets */
@media (min-width: 769px) and (max-width: 1024px) {
    .stats-bar {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .action-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .statistics-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .difficulty-buttons {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .main-content {
        padding: var(--spacing-xl) var(--spacing-lg);
    }
    
    .metrics-panel {
        grid-template-columns: 2fr 1fr;
    }
    
    .tab-headers {
        display: flex;
    }
    
    .action-buttons {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Desktop and larger screens */
@media (min-width: 1025px) {
    .stats-bar {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .action-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .statistics-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .difficulty-buttons {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .main-content {
        padding: var(--spacing-xl) var(--spacing-2xl);
    }
    
    .camera-container {
        max-width: 600px;
        margin: 0 auto;
        background: black;
        border-radius: var(--radius-lg);
        overflow: hidden;
    }
    
    .analysis-results {
        max-width: 800px;
        margin: 0 auto;
    }
    
    .analytics-content {
        max-width: 1000px;
        margin: 0 auto;
    }
    
    .challenge-content {
        max-width: 800px;
        margin: 0 auto;
    }
    
    .deep-dive-content {
        max-width: 800px;
        margin: 0 auto;
    }
}

/* Ultra-wide screens */
@media (min-width: 1400px) {
    .action-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .main-content {
        max-width: 1400px;
    }
}

/* Touch-specific styles */
@media (hover: none) and (pointer: coarse) {
    /* Increase touch targets */
    .back-btn,
    .gallery-btn,
    .control-btn {
        min-width: 48px;
        min-height: 48px;
    }
    
    .action-card {
        padding: var(--spacing-xl);
    }
    
    .tab-btn {
        padding: var(--spacing-lg);
        font-size: 1rem;
    }
    
    .action-btn {
        padding: var(--spacing-lg);
        font-size: 1rem;
    }
    
    /* Remove hover effects on touch devices */
    .action-card:hover,
    .stat-card:hover,
    .stat-box:hover {
        transform: none;
        box-shadow: var(--shadow-light);
    }
    
    .action-btn:hover,
    .retry-btn:hover {
        transform: none;
        box-shadow: none;
    }
}

/* Landscape orientation adjustments */
@media (orientation: landscape) and (max-height: 500px) {
    .app-header {
        padding: var(--spacing-md);
    }
    
    .header-content {
        flex-direction: row;
    }
    
    .app-title h1 {
        font-size: 1.25rem;
    }
    
    .app-title p {
        display: none;
    }
    
    .camera-overlay {
        display: none;
    }
    
    .camera-controls {
        bottom: 15px;
    }
    
    .loading-container {
        padding: var(--spacing-lg);
    }
    
    .app-logo {
        font-size: 3rem;
        margin-bottom: var(--spacing-md);
    }
    
    .loading-container h1 {
        font-size: 2rem;
    }
}

/* Print styles */
@media print {
    .screen {
        position: static;
        transform: none;
        height: auto;
        overflow: visible;
    }
    
    .app-header,
    .screen-header,
    .camera-header,
    .analysis-header,
    .back-btn,
    .gallery-btn,
    .camera-controls,
    .action-buttons,
    .toast-container,
    .install-prompt {
        display: none;
    }
    
    .main-content,
    .analysis-results,
    .analytics-content {
        padding: 0;
        max-width: none;
    }
    
    .action-grid,
    .stats-bar {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }
    
    .action-card,
    .stat-card {
        box-shadow: none;
        border: 1px solid var(--border-color);
    }
    
    body {
        background: white;
        color: black;
    }
    
    .solution-tabs {
        page-break-inside: avoid;
    }
    
    .tab-content {
        display: block !important;
        page-break-before: always;
    }
    
    .tab-headers {
        display: none;
    }
}

/* High DPI / Retina displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    /* Ensure crisp images and icons on high DPI displays */
    .app-logo,
    .card-icon,
    .stat-icon,
    .error-icon,
    .empty-icon {
        image-rendering: -webkit-optimize-contrast;
        image-rendering: crisp-edges;
    }
}

/* Reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
    .screen {
        transition: none;
    }
    
    .action-card:hover,
    .stat-card:hover,
    .action-btn:hover {
        transform: none;
    }
    
    .loading-spinner,
    .pulse-circle {
        animation: none;
    }
    
    .app-logo {
        animation: none;
    }
    
    .step-item.active {
        transform: none;
    }
}

/* Dark mode preparation (ready for future implementation) */
@media (prefers-color-scheme: dark) {
    /* Variables will be updated when dark mode is implemented */
    /* :root {
        Dark mode colors would go here
    } */
}

/* Screen reader and accessibility improvements */
@media (prefers-reduced-transparency: reduce) {
    .camera-overlay,
    .control-btn,
    .capture-btn {
        backdrop-filter: none;
        background: rgba(0, 0, 0, 0.8);
    }
}

/* Focus visible for better keyboard navigation */
@supports selector(:focus-visible) {
    button:focus:not(:focus-visible),
    .action-card:focus:not(:focus-visible) {
        outline: none;
    }
    
    button:focus-visible,
    .action-card:focus-visible {
        outline: 2px solid var(--primary-color);
        outline-offset: 2px;
    }
}

/* Container queries for component-level responsive design */
@supports (container-type: inline-size) {
    .action-grid {
        container-type: inline-size;
    }
    
    @container (max-width: 600px) {
        .action-card {
            padding: var(--spacing-md);
        }
        
        .card-icon {
            font-size: 2rem;
        }
    }
}

/* Safe area handling for devices with notches */
@supports (padding: max(0px)) {
    .app-header {
        padding-top: max(var(--spacing-lg), env(safe-area-inset-top));
        padding-left: max(var(--spacing-md), env(safe-area-inset-left));
        padding-right: max(var(--spacing-md), env(safe-area-inset-right));
    }
    
    .camera-controls {
        bottom: max(40px, env(safe-area-inset-bottom));
    }
    
    .install-prompt {
        bottom: max(20px, env(safe-area-inset-bottom));
        left: max(20px, env(safe-area-inset-left));
        right: max(20px, env(safe-area-inset-right));
    }
}

/* Foldable device support */
@media (spanning: single-fold-vertical) {
    .main-content {
        max-width: 50vw;
    }
    
    .action-grid {
        grid-template-columns: 1fr;
    }
}

@media (spanning: single-fold-horizontal) {
    .app-header {
        height: 50vh;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .main-content {
        height: 50vh;
        overflow-y: auto;
    }
}

/* Browser-specific fixes */

/* Safari iOS */
@supports (-webkit-touch-callout: none) {
    /* Fix for iOS Safari viewport units */
    .screen {
        height: -webkit-fill-available;
    }
    
    /* Prevent zoom on input focus */
    input[type="text"],
    input[type="search"] {
        font-size: 16px;
    }
}

/* Firefox */
@-moz-document url-prefix() {
    /* Firefox-specific styles if needed */
    .capture-btn {
        /* Firefox button reset */
        -moz-appearance: none;
        appearance: none;
    }
}

/* Edge specific */
@supports (-ms-ime-align: auto) {
    /* Edge-specific styles if needed */
}

/* Chrome/Webkit specific */
@media screen and (-webkit-min-device-pixel-ratio: 0) {
    /* Chrome-specific styles if needed */
}

/* Performance optimizations for mobile */
@media (max-width: 768px) {
    /* Reduce visual complexity on mobile */
    .action-card,
    .stat-card,
    .stat-box {
        will-change: transform;
    }
    
    /* Optimize animations for mobile */
    .loading-spinner,
    .pulse-circle {
        will-change: transform;
    }
    
    /* Reduce blur effects on low-end devices */
    @media (max-resolution: 150dpi) {
        .control-btn,
        .capture-btn {
            backdrop-filter: none;
            background: rgba(255, 255, 255, 0.9);
        }
    }
}

/* PWA specific styles */
@media (display-mode: standalone) {
    /* Hide elements that are not needed in PWA mode */
    .install-prompt {
        display: none;
    }
    
    /* Adjust spacing for standalone mode */
    .app-header {
        padding-top: calc(var(--spacing-lg) + env(safe-area-inset-top, 0px));
    }
}

/* Network quality adaptations */
@media (prefers-reduced-data: reduce) {
    /* Reduce data usage */
    .action-card,
    .stat-card {
        background-image: none;
    }
    
    /* Disable non-essential animations */
    .loading-spinner,
    .pulse-circle,
    .app-logo {
        animation: none;
    }
}