/* Queen Ruva AI - Mobile First CSS */
/* Optimized for Android & iOS with smooth animations */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

:root {
    /* Android Material Design Colors */
    --primary-color: #6750A4;
    --primary-light: #EADDFF;
    --secondary-color: #625B71;
    --surface-color: #FFFBFE;
    --surface-variant: #E7E0EC;
    --error-color: #BA1A1A;
    --outline-color: #79747E;
    
    /* iOS Inspired Colors */
    --ios-blue: #007AFF;
    --ios-gray: #8E8E93;
    --ios-light: #F2F2F7;
    
    /* Theme Colors */
    --bg-primary: #0A0A0F;
    --bg-secondary: #1A1A2E;
    --bg-card: #161B22;
    --accent-color: #BB86FC;
    --accent-secondary: #03DAC6;
    --text-primary: #E4E6EB;
    --text-secondary: #B0B3B8;
    --border-color: #30363D;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-dark: linear-gradient(135deg, #0f2027 0%, #203a43 50%, #2c5364 100%);
    --gradient-accent: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #667eea 100%);
    
    /* Shadows - Material Design */
    --shadow-1: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
    --shadow-2: 0 3px 6px rgba(0,0,0,0.16), 0 3px 6px rgba(0,0,0,0.23);
    --shadow-3: 0 10px 20px rgba(0,0,0,0.19), 0 6px 6px rgba(0,0,0,0.23);
    --shadow-4: 0 14px 28px rgba(0,0,0,0.25), 0 10px 10px rgba(0,0,0,0.22);
    --shadow-inner: inset 0 2px 4px rgba(0,0,0,0.1);
    
    /* Spacing - Mobile First */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-xxl: 3rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Transitions - Smooth & Native-like */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 400ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
    
    /* Typography - System Fonts */
    --font-system: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen-Sans, Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;
    --font-mono: 'SF Mono', 'Roboto Mono', Menlo, Monaco, Consolas, monospace;
}

/* Base Styles */
html {
    font-size: 16px;
    height: 100%;
    overflow-x: hidden;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-system);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    min-height: -webkit-fill-available;
    overscroll-behavior-y: none;
    -webkit-overflow-scrolling: touch;
}

/* Improve touch targets */
button, 
a, 
[role="button"] {
    min-height: 44px;
    min-width: 44px;
    touch-action: manipulation;
}

/* Header */
.header {
    background: var(--gradient-dark);
    padding: var(--space-lg);
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 80%, rgba(103, 80, 164, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(187, 134, 252, 0.1) 0%, transparent 50%);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
    position: relative;
    z-index: 1;
}

.logo {
    font-size: 1.75rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-top: var(--space-xs);
    opacity: 0.9;
}

/* Navigation - Mobile Optimized */
.navbar {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-sm) var(--space-md);
}

.nav-scroll {
    display: flex;
    gap: var(--space-xs);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-bottom: 2px;
}

.nav-scroll::-webkit-scrollbar {
    display: none;
}

.nav-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 0.875rem;
    white-space: nowrap;
    transition: all var(--transition-normal);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.nav-btn::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: width var(--transition-normal);
}

.nav-btn.active {
    color: var(--accent-color);
    background: rgba(187, 134, 252, 0.1);
}

.nav-btn.active::after {
    width: 70%;
}

.nav-btn:active {
    transform: scale(0.95);
    background: rgba(187, 134, 252, 0.2);
}

.back-btn {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 0.875rem;
    transition: all var(--transition-normal);
    cursor: pointer;
    margin-left: var(--space-sm);
}

.back-btn:active {
    transform: translateX(-4px);
    background: var(--bg-card);
}

/* Main Content */
.main-content {
    padding: var(--space-lg) 0;
}

.section {
    display: none;
    animation: fadeIn var(--transition-normal);
}

.section.active {
    display: block;
}

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

/* Cards */
.welcome-card, 
.dev-card, 
.update-card,
.stat-card,
.feature-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.welcome-card::before,
.dev-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-accent);
}

.welcome-card:hover,
.dev-card:hover,
.update-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-3);
    border-color: var(--accent-color);
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--space-md);
    margin-top: var(--space-lg);
}

.feature-card {
    text-align: center;
    padding: var(--space-md);
    background: var(--bg-secondary);
}

.feature-card i {
    font-size: 2rem;
    color: var(--accent-color);
    margin-bottom: var(--space-sm);
    display: block;
}

.feature-card h3 {
    font-size: 1rem;
    margin-bottom: var(--space-xs);
}

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

/* Stats Container */
.stats-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
    margin-top: var(--space-lg);
}

.stat-card {
    text-align: center;
    padding: var(--space-lg);
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--space-xs);
}

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

/* Gallery */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: var(--space-md);
    margin-top: var(--space-lg);
}

.gallery-item {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    aspect-ratio: 1;
    cursor: pointer;
    transform: scale(1);
    transition: all var(--transition-normal);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.gallery-item:hover img {
    transform: scale(1.1);
}

.gallery-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0,0,0,0.8));
    padding: var(--space-md);
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transform: translateY(100%);
    transition: transform var(--transition-normal);
}

.gallery-item:hover .gallery-overlay {
    transform: translateY(0);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.9);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    padding: var(--space-md);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    animation: modalFadeIn var(--transition-normal);
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
        backdrop-filter: blur(0);
    }
    to {
        opacity: 1;
        backdrop-filter: blur(10px);
    }
}

.modal-content {
    position: relative;
    max-width: 90%;
    max-height: 90%;
    animation: modalSlideUp var(--transition-bounce);
}

@keyframes modalSlideUp {
    from {
        opacity: 0;
        transform: translateY(50px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-close {
    position: absolute;
    top: -40px;
    right: 0;
    color: white;
    font-size: 2rem;
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255,255,255,0.1);
    border-radius: var(--radius-full);
}

.modal img {
    width: 100%;
    height: auto;
    max-height: 70vh;
    object-fit: contain;
    border-radius: var(--radius-md);
}

.modal-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md);
    background: var(--bg-card);
    border-radius: 0 0 var(--radius-md) var(--radius-md);
}

#modalDownload {
    color: var(--accent-color);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

/* Updates */
.update-timeline {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    margin-top: var(--space-lg);
}

.update-badge {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    background: var(--gradient-primary);
    color: white;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
}

.update-content {
    padding-right: var(--space-xl);
}

.update-content ul {
    list-style: none;
    margin-top: var(--space-md);
}

.update-content li {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-sm);
    color: var(--text-secondary);
}

.update-content li i {
    color: var(--accent-color);
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
    margin-top: var(--space-lg);
}

.metric {
    text-align: center;
}

.metric-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: var(--space-xs);
}

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

/* Dev Section */
.dev-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.dev-avatar {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.dev-info h3 {
    font-size: 1.25rem;
    margin-bottom: var(--space-xs);
}

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

.dev-content p {
    margin-bottom: var(--space-lg);
    font-style: italic;
    color: var(--text-secondary);
    position: relative;
    padding: var(--space-md);
}

.dev-content p i:first-child {
    position: absolute;
    top: 0;
    left: 0;
    opacity: 0.3;
}

.dev-content p i:last-child {
    position: absolute;
    bottom: 0;
    right: 0;
    opacity: 0.3;
}

.contact-actions {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
    margin-bottom: var(--space-lg);
}

.contact-btn, .download-btn {
    flex: 1;
    min-width: 120px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.contact-btn:active, .download-btn:active {
    transform: scale(0.98);
    background: var(--bg-card);
}

.contact-btn:hover, .download-btn:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
}

.download-btn {
    background: var(--gradient-primary);
    color: white;
    font-weight: 600;
    margin-top: var(--space-md);
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-3);
}

.download-note {
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: var(--space-sm);
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    padding: var(--space-lg) 0;
    margin-top: var(--space-xxl);
    border-top: 1px solid var(--border-color);
}

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

.footer-logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: var(--space-md);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
    margin: var(--space-lg) 0;
}

.footer-links a {
    color: var(--text-secondary);
    font-size: 1.25rem;
    transition: color var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    background: var(--bg-card);
}

.footer-links a:active {
    color: var(--accent-color);
    transform: scale(0.95);
}

.footer-copyright {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: var(--space-sm);
}

.footer-version {
    color: var(--text-secondary);
    font-size: 0.75rem;
    opacity: 0.7;
}

/* Utility Classes */
.section-title {
    font-size: 1.5rem;
    margin-bottom: var(--space-sm);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.section-subtitle {
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
}

/* Loading Animation */
@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

.loading {
    background: linear-gradient(90deg, var(--bg-secondary) 25%, var(--bg-card) 50%, var(--bg-secondary) 75%);
    background-size: 1000px 100%;
    animation: shimmer 2s infinite;
}

/* Ripple Effect */
.ripple {
    position: relative;
    overflow: hidden;
}

.ripple::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 5px;
    height: 5px;
    background: rgba(255, 255, 255, 0.5);
    opacity: 0;
    border-radius: 100%;
    transform: scale(1, 1) translate(-50%);
    transform-origin: 50% 50%;
}

.ripple:focus:not(:active)::after {
    animation: ripple 1s ease-out;
}

@keyframes ripple {
    0% {
        transform: scale(0, 0);
        opacity: 0.5;
    }
    100% {
        transform: scale(50, 50);
        opacity: 0;
    }
}

/* Responsive Design */
@media (max-width: 480px) {
    html {
        font-size: 14px;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stats-container {
        grid-template-columns: 1fr;
    }
    
    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-actions {
        flex-direction: column;
    }
    
    .modal-content {
        max-width: 95%;
        max-height: 95%;
    }
}

@media (min-width: 768px) {
    .features-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .stats-container {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .gallery-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .nav-scroll {
        max-height: none;
        overflow-y: visible;
    }
}

/* Dark/Light Mode Support */
@media (prefers-color-scheme: light) {
    :root {
        --bg-primary: #F8F9FA;
        --bg-secondary: #FFFFFF;
        --bg-card: #FFFFFF;
        --text-primary: #212529;
        --text-secondary: #6C757D;
        --border-color: #DEE2E6;
        --shadow-1: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
        --shadow-2: 0 3px 6px rgba(0,0,0,0.1), 0 3px 6px rgba(0,0,0,0.08);
    }
}

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

/* iOS Safari specific fixes */
@supports (-webkit-touch-callout: none) {
    body {
        min-height: -webkit-fill-available;
    }
    
    .header {
        padding-top: env(safe-area-inset-top);
    }
    
    .footer {
        padding-bottom: env(safe-area-inset-bottom);
    }
}

/* Chrome/Safari momentum scrolling */
.scroll-area {
    -webkit-overflow-scrolling: touch;
    overflow-y: auto;
}

/* Prevent text size adjustment on orientation change */
html {
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
}

/* Selection color */
::selection {
    background: var(--accent-color);
    color: white;
}

::-moz-selection {
    background: var(--accent-color);
    color: white;
}

/* Smooth scroll for anchor links */
html {
    scroll-behavior: smooth;
}

/* Focus styles for accessibility */
:focus-visible {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}