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

/* Image Optimization */
img {
    max-width: 100%;
    height: auto;
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
    image-rendering: optimize-contrast;
}

/* Lazy loading optimization */
img[loading="lazy"] {
    opacity: 0;
    transition: opacity 0.3s;
}

img[loading="lazy"].loaded {
    opacity: 1;
}

/* Responsive images */
picture {
    display: block;
    width: 100%;
}

picture img {
    width: 100%;
    height: auto;
    image-rendering: optimize-quality;
    image-rendering: -webkit-optimize-contrast;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo img {
    height: 40px;
    width: auto;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
    align-items: center;
}

.nav-menu li a {
    padding: 12px 16px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.nav-menu a {
    color: #fff;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-menu a:hover,
.nav-menu a[aria-current="page"] {
    color: #ffd700;
}

.nav-buttons {
    display: flex;
    gap: 20px;
    align-items: center;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 600;
    text-align: center;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    min-height: 44px;
    min-width: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-login {
    background: transparent;
    color: #fff;
    border-color: #ffd700;
}

.btn-login:hover {
    background: #ffd700;
    color: #1a1a2e;
}

.btn-register {
    background: #ffd700;
    color: #1a1a2e;
}

.btn-register:hover {
    background: #fff;
    color: #1a1a2e;
}

.btn-primary {
    background: linear-gradient(135deg, #ffd700 0%, #ffed4e 100%);
    color: #1a1a2e;
    font-size: 18px;
    padding: 15px 30px;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255, 215, 0, 0.4);
}

.btn-secondary {
    background: transparent;
    color: #1a1a2e;
    border-color: #1a1a2e;
}

.btn-secondary:hover {
    background: #1a1a2e;
    color: #fff;
}

.btn-outline {
    background: transparent;
    color: #1a1a2e;
    border-color: #1a1a2e;
}

.btn-outline:hover {
    background: #1a1a2e;
    color: #fff;
}

.btn-large {
    font-size: 20px;
    padding: 18px 36px;
}

/* Breadcrumb */
.breadcrumb {
    background: #fff;
    padding: 10px 0;
    border-bottom: 1px solid #e9ecef;
}

.breadcrumb-list {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    list-style: none;
}

.breadcrumb-item a {
    color: #6c757d;
    text-decoration: none;
}

.breadcrumb-item a:hover {
    color: #1a1a2e;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    color: #fff;
    padding: 80px 0;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-description {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.hero-image img {
    width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

/* Main Content */
.main-content {
    padding: 80px 0;
}

.brand-intro,
.platform-features,
.registration-process,
.advantages-security,
.faq-section,
.cta-section {
    margin-bottom: 80px;
}

.brand-intro h2,
.platform-features h2,
.registration-process h2,
.advantages-security h2,
.faq-section h2,
.cta-section h2 {
    font-size: 2.5rem;
    color: #1a1a2e;
    margin-bottom: 30px;
    text-align: center;
}

.brand-intro p,
.registration-process p {
    font-size: 1.1rem;
    margin-bottom: 20px;
    text-align: justify;
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-top: 40px;
}

.feature-card {
    background: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    text-align: center;
    transition: transform 0.3s ease;
}

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

.feature-card {
    border-left: 4px solid #ffd700;
}

.feature-card h3 {
    font-size: 1.5rem;
    color: #1a1a2e;
    margin-bottom: 15px;
}

/* Section Introduction */
.section-intro {
    font-size: 1.2rem;
    text-align: center;
    margin-bottom: 50px;
    color: #555;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
}

/* Unique Features Section */
.unique-features {
    margin-top: 60px;
    padding: 40px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: 15px;
}

.unique-features h3 {
    text-align: center;
    font-size: 2rem;
    color: #1a1a2e;
    margin-bottom: 40px;
}

.unique-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    max-width: 1000px;
    margin: 0 auto;
}

.unique-item {
    background: #fff;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 3px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.unique-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.unique-item h4 {
    font-size: 1.3rem;
    color: #1a1a2e;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.unique-item p {
    color: #666;
    line-height: 1.6;
}

/* Platform Benefits Section */
.platform-benefits {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    padding: 80px 0;
    margin: 80px 0;
}

.platform-benefits h2 {
    text-align: center;
    font-size: 2.5rem;
    color: #1a1a2e;
    margin-bottom: 30px;
}

/* Statistics Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin: 50px 0;
}

.stat-item {
    background: #fff;
    padding: 30px 20px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 2px solid transparent;
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
    border-color: #ffd700;
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: #ffd700;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
}

.stat-label {
    font-size: 1.2rem;
    font-weight: 600;
    color: #1a1a2e;
    margin-bottom: 10px;
}

.stat-description {
    font-size: 0.9rem;
    color: #666;
    line-height: 1.4;
}

/* Benefits Section */
.benefits-section {
    margin: 60px 0;
}

.benefits-section h3 {
    text-align: center;
    font-size: 2rem;
    color: #1a1a2e;
    margin-bottom: 40px;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.benefit-card {
    background: #fff;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border-left: 4px solid #ffd700;
}

.benefit-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
}

.benefit-icon {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.benefit-card h4 {
    font-size: 1.3rem;
    color: #1a1a2e;
    margin-bottom: 15px;
    font-weight: 600;
}

.benefit-card p {
    color: #666;
    line-height: 1.6;
    font-size: 0.95rem;
}

/* Community Highlight */
.community-highlight {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    padding: 40px;
    border-radius: 20px;
    margin-top: 50px;
    color: #fff;
}

.community-highlight h3 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 30px;
    color: #fff;
}

.community-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 30px;
}

.community-item {
    text-align: center;
    padding: 20px;
}

.community-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: #ffd700;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.community-text {
    font-size: 1rem;
    color: #fff;
    opacity: 0.9;
}

/* Advantages Grid */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.advantage-item {
    background: #fff;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 3px 15px rgba(0,0,0,0.1);
}

.advantage-item h3 {
    color: #1a1a2e;
    margin-bottom: 15px;
    font-size: 1.3rem;
}

/* FAQ Section */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: #fff;
    margin-bottom: 20px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    overflow: hidden;
}

.faq-item h3 {
    background: #1a1a2e;
    color: #fff;
    padding: 20px;
    margin: 0;
    font-size: 1.2rem;
}

.faq-item p {
    padding: 20px;
    margin: 0;
}

.faq-item a {
    color: #ffd700;
    text-decoration: none;
}

.faq-item a:hover {
    text-decoration: underline;
}

/* CTA Section */
.cta-section {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    color: #fff;
    text-align: center;
    padding: 80px 0;
    border-radius: 20px;
}

.cta-section h2 {
    color: #fff;
    margin-bottom: 20px;
}

.cta-section p {
    font-size: 1.2rem;
    margin-bottom: 40px;
    opacity: 0.9;
}

.cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Footer */
.footer {
    background: #1a1a2e;
    color: #fff;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 20px;
    color: #ffd700;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section a {
    color: #fff;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: #ffd700;
}

.footer-bottom {
    border-top: 1px solid #333;
    padding-top: 20px;
    text-align: center;
    opacity: 0.8;
}

.footer-bottom a {
    color: #ffd700;
    text-decoration: none;
}

.footer-bottom a:hover {
    text-decoration: underline;
}

/* Navigation Toggle Button */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    color: #fff;
    font-size: 24px;
    cursor: pointer;
    padding: 12px;
    min-height: 44px;
    min-width: 44px;
    border-radius: 6px;
    transition: background-color 0.3s ease;
}

.nav-toggle:hover,
.nav-toggle:focus {
    background-color: rgba(255, 255, 255, 0.1);
    outline: 2px solid #ffd700;
    outline-offset: 2px;
}

.nav-toggle:active {
    background-color: rgba(255, 255, 255, 0.2);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }
    
    .nav-container {
        flex-direction: column;
        height: auto;
        padding: 20px;
    }
    
    .nav-menu {
        margin: 20px 0;
        flex-direction: column;
        gap: 20px;
        text-align: center;
        display: none;
        width: 100%;
    }
    
    .nav-menu.nav-menu-open {
        display: flex;
    }
    
    .nav-menu li a {
        width: 100%;
        min-height: 48px;
        padding: 16px 20px;
        font-size: 16px;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .advantages-grid {
        grid-template-columns: 1fr;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .benefits-grid {
        grid-template-columns: 1fr;
    }
    
    .community-stats {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .btn {
        padding: 14px 24px;
        font-size: 16px;
        min-height: 48px;
        min-width: 48px;
    }
    
    .btn-large {
        font-size: 18px;
        padding: 18px 32px;
        min-height: 52px;
    }
    
    .nav-buttons {
        gap: 16px;
        width: 100%;
        justify-content: center;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-number {
        font-size: 2.5rem;
    }
    
    .community-stats {
        grid-template-columns: 1fr;
    }
    
    .community-number {
        font-size: 2rem;
    }
}

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

/* Focus styles for accessibility */
.btn:focus,
.nav-menu a:focus,
.footer-section a:focus {
    outline: 2px solid #ffd700;
    outline-offset: 2px;
}

/* Print styles */
@media print {
    .navbar,
    .footer,
    .cta-section,
    .hero-buttons,
    .cta-buttons {
        display: none;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.4;
    }
    
    h1, h2, h3 {
        page-break-after: avoid;
    }
}