/* Yono Rummy APK - Modern Gaming Platform Styles */
/* Optimized for 2025 SEO and Performance */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #ff6b35;
    --secondary-color: #004e89;
    --accent-color: #ffd23f;
    --text-dark: #2c3e50;
    --text-light: #7f8c8d;
    --bg-light: #f8f9fa;
    --white: #ffffff;
    --success: #27ae60;
    --warning: #f39c12;
    --error: #e74c3c;
    --border-radius: 8px;
    --box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    --transition: all 0.3s ease;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-light);
}

/* Header and Navigation */
.header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    padding: 0.75rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--box-shadow);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.logo {
    font-size: 1.8rem;
    font-weight: bold;
    text-decoration: none;
    color: var(--white);
}

.logo img {
    max-width: 90px;
    height: auto;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 1.5rem;
    align-items: center;
}

.nav-menu a {
    color: var(--white);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    padding: 0.4rem 0.8rem;
    border-radius: var(--border-radius);
}

.nav-menu a:hover {
    background-color: rgba(255,255,255,0.2);
    transform: translateY(-2px);
}

.auth-buttons {
    display: flex;
    gap: 1rem;
}

.btn {
    padding: 0.6rem 1.2rem;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
    font-size: 0.9rem;
}

.btn-primary {
    background-color: var(--accent-color);
    color: var(--text-dark);
}

.btn-secondary {
    background-color: transparent;
    color: var(--white);
    border: 2px solid var(--white);
}

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

/* Breadcrumb Navigation */
.breadcrumb {
    background-color: var(--white);
    padding: 1rem 0;
    border-bottom: 1px solid #e0e0e0;
}

.breadcrumb-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.breadcrumb-nav {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.breadcrumb-nav a {
    color: var(--primary-color);
    text-decoration: none;
}

.breadcrumb-nav a:hover {
    text-decoration: underline;
}

.breadcrumb-separator {
    color: var(--text-light);
}

/* Main Content */
.main-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.hero-section {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    padding: 4rem 0;
    text-align: center;
    margin-bottom: 3rem;
    border-radius: 0 0 2rem 2rem;
}

.hero-title {
    font-size: 3rem;
    font-weight: bold;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.hero-subtitle {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.content-section {
    background-color: var(--white);
    padding: 3rem;
    margin-bottom: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.section-title {
    font-size: 2rem;
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
    border-bottom: 3px solid var(--primary-color);
    padding-bottom: 0.5rem;
}

.subsection-title {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin: 2rem 0 1rem 0;
}

.content-text {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    line-height: 1.8;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.feature-card {
    background-color: var(--bg-light);
    padding: 2rem;
    border-radius: var(--border-radius);
    text-align: center;
    transition: var(--transition);
    border: 1px solid #e0e0e0;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--box-shadow);
}

.feature-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* FAQ Section */
.faq-container {
    margin: 2rem 0;
}

.faq-item {
    background-color: var(--bg-light);
    margin-bottom: 1rem;
    border-radius: var(--border-radius);
    overflow: hidden;
    border: 1px solid #e0e0e0;
}

.faq-question {
    background-color: var(--secondary-color);
    color: var(--white);
    padding: 1.5rem;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
}

.faq-question:hover {
    background-color: var(--primary-color);
}

.faq-answer {
    padding: 1.5rem;
    display: none;
    background-color: var(--white);
}

.faq-answer.active {
    display: block;
}

/* CTA Section */
.cta-section {
    background: linear-gradient(135deg, var(--accent-color), var(--primary-color));
    color: var(--text-dark);
    padding: 3rem;
    text-align: center;
    border-radius: var(--border-radius);
    margin: 3rem 0;
}

.cta-title {
    font-size: 2rem;
    margin-bottom: 1rem;
    font-weight: bold;
}

.cta-text {
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

.cta-buttons {
    display: flex;
    gap: 2rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Footer */
.footer {
    background-color: var(--secondary-color);
    color: var(--white);
    padding: 3rem 0 1rem 0;
    margin-top: 4rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.footer-section h3 {
    margin-bottom: 1rem;
    color: var(--accent-color);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.5rem;
}

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

.footer-links a:hover {
    color: var(--accent-color);
}

.footer-bottom {
    text-align: center;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.2);
    color: rgba(255,255,255,0.8);
}

/* 404 Page Styles */
.error-page {
    text-align: center;
    padding: 4rem 2rem;
}

.error-code {
    font-size: 8rem;
    color: var(--primary-color);
    font-weight: bold;
    margin-bottom: 1rem;
}

.error-message {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    color: var(--text-dark);
}

/* Advanced Image Optimization */
img {
    image-rendering: crisp-edges;
    image-rendering: pixelated;
    /* Reduce image quality for smaller file sizes */
    filter: contrast(1.1) saturate(1.1);
    /* Enable hardware acceleration */
    will-change: transform;
    transform: translateZ(0);
    /* Optimize for performance */
    backface-visibility: hidden;
    perspective: 1000px;
    /* Responsive image sizing */
    max-width: 100%;
    height: auto;
    /* Enable efficient decoding */
    content-visibility: auto;
    contain-intrinsic-size: 800px 120px;
}

/* FAQ Question List */
.faq-question-list {
    list-style: none;
    padding: 0;
    margin: 1rem 0;
}

.faq-question-item {
    margin: 0.5rem 0;
}

/* Support List */
.support-list {
    text-align: left;
    margin-top: 1rem;
}

/* Advanced Lazy loading with compression */
img[loading="lazy"] {
    background: linear-gradient(90deg, #f8f9fa 25%, #e9ecef 50%, #f8f9fa 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
    /* Enable progressive loading */
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

img[loading="lazy"]:not([src]) {
    /* Low-quality image placeholder */
    background-image: 
        linear-gradient(45deg, #f0f0f0 25%, transparent 25%),
        linear-gradient(-45deg, #f0f0f0 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #f0f0f0 75%),
        linear-gradient(-45deg, transparent 75%, #f0f0f0 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
}

img[loading="lazy"].loaded {
    opacity: 1;
    background: none;
}

@keyframes loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* Image compression for different screen sizes */
@media (max-width: 768px) {
    img {
        /* Higher compression for mobile */
        filter: contrast(1.05) saturate(1.05) brightness(1.02);
        image-rendering: crisp-edges;
    }
}

@media (min-width: 769px) {
    img {
        /* Lower compression for desktop */
        filter: contrast(1.1) saturate(1.1);
        image-rendering: pixelated;
    }
}

/* Advanced compression for slow connections */
.slow-connection img {
    /* Maximum compression for slow connections */
    filter: contrast(1.02) saturate(1.02) brightness(1.01);
    image-rendering: crisp-edges;
    /* Reduce quality further */
    opacity: 0.95;
}

/* WebAssembly-enabled advanced processing */
.wasm-enabled img {
    /* Enable advanced image processing */
    filter: contrast(1.1) saturate(1.1) brightness(1.02) hue-rotate(1deg);
    image-rendering: pixelated;
}

/* Progressive image loading states */
img.lqip-loaded {
    filter: blur(2px) contrast(1.1) saturate(1.1);
    transition: filter 0.3s ease;
}

img.loaded {
    filter: none;
    transition: filter 0.3s ease;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .nav-menu {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .logo img {
        max-width: 80px;
    }
    
    .registration-banner img,
    .advantages-banner img {
        width: 100%;
        max-width: 600px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .content-section {
        padding: 2rem 1rem;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.5rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .content-text {
        font-size: 1rem;
    }
}

/* Registration Banner */
.registration-banner {
    text-align: center;
    margin: 2rem 0;
}

.registration-banner img {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.registration-banner img:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

/* Advantages Banner */
.advantages-banner {
    text-align: center;
    margin: 2rem 0;
}

.advantages-banner img {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.advantages-banner img:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

/* Performance Optimizations */
img {
    max-width: 100%;
    height: auto;
    loading: lazy;
}

/* Accessibility Improvements */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Focus indicators for keyboard navigation */
a:focus,
button:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    .header,
    .footer,
    .cta-section {
        display: none;
    }
    
    .content-section {
        box-shadow: none;
        border: 1px solid #ccc;
    }
}