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

:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --secondary-color: #8b5cf6;
    --background: #0f172a;
    --surface: #1e293b;
    --surface-light: #334155;
    --text: #f1f5f9;
    --text-secondary: #cbd5e1;
    --accent: #06b6d4;
    --success: #10b981;
    --border: #475569;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--background);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* Header */
.header {
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 1.5rem;
    font-weight: 900;
    letter-spacing: -0.5px;
}

.logo-text {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 900;
    letter-spacing: -1px;
}

.logo-suffix {
    color: var(--text);
    font-weight: 700;
    letter-spacing: 0;
}

.nav {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s;
    font-weight: 500;
}

.nav-link:hover {
    color: var(--primary-color);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text);
    font-size: 1.5rem;
    cursor: pointer;
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--surface);
    padding: 1rem;
    flex-direction: column;
    gap: 1rem;
    z-index: 999;
    border-bottom: 1px solid var(--border);
}

.mobile-menu.active {
    display: flex;
}

.mobile-nav-link {
    color: var(--text);
    text-decoration: none;
    padding: 0.75rem;
    border-radius: 0.5rem;
    transition: background 0.3s;
}

.mobile-nav-link:hover {
    background: var(--surface-light);
}

/* Hero Section */
.hero {
    padding: 8rem 0 6rem;
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    position: relative;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0.4;
    z-index: 0;
}

.hero-background::before,
.hero-background::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.3), transparent);
    animation: float 8s ease-in-out infinite;
}

.hero-background::before {
    top: -20%;
    right: -10%;
    width: 500px;
    height: 500px;
}

.hero-background::after {
    bottom: -20%;
    left: -10%;
    width: 600px;
    height: 600px;
    animation-delay: 4s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); opacity: 0.3; }
    50% { transform: translate(30px, -30px) scale(1.1); opacity: 0.5; }
}


.hero-content {
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
}

.hero-features {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
    margin-bottom: 3rem;
}

.hero-feature {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--surface);
    border-radius: 2rem;
    border: 1px solid var(--border);
}

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

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

/* Buttons */
.btn {
    padding: 1rem 2rem;
    border-radius: 0.75rem;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    display: inline-block;
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(99, 102, 241, 0.3);
}

.btn-secondary {
    background: var(--surface);
    color: var(--text);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--surface-light);
    transform: translateY(-2px);
}

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

.btn-outline:hover {
    background: var(--primary-color);
    color: white;
}

.btn-small {
    padding: 0.5rem 1.5rem;
    font-size: 0.9rem;
}

/* Sections */
section {
    padding: 5rem 0;
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 1rem;
    font-weight: 800;
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 3rem;
}

/* Features Grid */
.features {
    background: var(--surface);
}

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

.feature-card {
    background: var(--background);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--border);
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.2);
    border-color: var(--primary-color);
}

.feature-icon-large {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Pricing */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.pricing-card {
    background: var(--surface);
    padding: 2rem;
    border-radius: 1rem;
    border: 2px solid var(--border);
    position: relative;
    transition: all 0.3s;
}

.pricing-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(99, 102, 241, 0.2);
}

.pricing-card-popular {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, var(--surface) 0%, rgba(99, 102, 241, 0.05) 100%);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 0.25rem 1rem;
    border-radius: 1rem;
    font-size: 0.85rem;
    font-weight: 600;
}

.pricing-header {
    text-align: center;
    margin-bottom: 2rem;
}

.pricing-header h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.pricing-price {
    font-size: 3rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.price-currency {
    font-size: 1.5rem;
}

.pricing-period {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.pricing-features {
    list-style: none;
    margin-bottom: 2rem;
}

.pricing-features li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
}

.pricing-features li:last-child {
    border-bottom: none;
}

.pricing-card .btn {
    width: 100%;
    text-align: center;
}

/* Apps Section */
.apps {
    background: var(--surface);
}

.apps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.app-card {
    background: var(--background);
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    border: 1px solid var(--border);
    transition: all 0.3s;
}

.app-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
}

.app-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.app-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.app-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

/* Setup Guide */
.setup-guide {
    background: var(--background);
    padding: 3rem;
    border-radius: 1rem;
    margin-top: 3rem;
    border: 1px solid var(--border);
}

.setup-guide h3 {
    font-size: 2rem;
    margin-bottom: 2rem;
    text-align: center;
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.step {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.step-number {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 1rem;
}

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

.step a {
    color: var(--primary-color);
}

/* About Section */
.about {
    background: var(--surface);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.about-text h3 {
    font-size: 1.75rem;
    margin: 2rem 0 1rem 0;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.payment-methods {
    display: flex;
    gap: 1.5rem;
    margin-top: 1rem;
}

.payment-method {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--surface);
    border-radius: 0.5rem;
    border: 1px solid var(--border);
}

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

.tech-info {
    list-style: none;
    margin-top: 1rem;
}

.tech-info li {
    padding: 0.75rem 0;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border);
}

.tech-info li:last-child {
    border-bottom: none;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.stat-card {
    background: var(--surface);
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    border: 1px solid var(--border);
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* FAQ Section */
.faq {
    background: var(--background);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--background);
    padding: 1.5rem;
    border-radius: 0.75rem;
    margin-bottom: 1rem;
    border: 1px solid var(--border);
    cursor: pointer;
    transition: all 0.3s;
}

.faq-item:hover {
    border-color: var(--primary-color);
}

.faq-question {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text);
}

.faq-answer {
    color: var(--text-secondary);
    line-height: 1.7;
}

.faq-answer a {
    color: var(--primary-color);
    text-decoration: none;
}

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

/* Contact Section */
.contact {
    background: var(--surface);
}

.contact-content {
    max-width: 600px;
    margin: 0 auto;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    padding: 1.5rem;
    background: var(--surface);
    border-radius: 0.75rem;
    margin-bottom: 1rem;
    border: 1px solid var(--border);
}

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

.contact-item h4 {
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.contact-item p {
    color: var(--text-secondary);
    margin: 0;
}

.contact-item a {
    color: var(--primary-color);
    text-decoration: none;
}

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

/* Footer */
.footer {
    background: var(--surface);
    padding: 3rem 0 1rem;
    border-top: 1px solid var(--border);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 1.5rem;
    font-weight: 900;
    margin-bottom: 0.5rem;
}

.footer-text {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 900;
    letter-spacing: -1px;
}

.footer-suffix {
    color: var(--text);
    font-weight: 700;
}

.footer-section h4 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.footer-section a {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    margin-bottom: 0.5rem;
    transition: color 0.3s;
}

.footer-section a:hover {
    color: var(--primary-color);
}

.footer-section p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    color: var(--text-secondary);
}

.footer-disclaimer {
    font-size: 0.85rem;
    margin-top: 0.5rem;
    opacity: 0.7;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav {
        display: none;
    }

    .mobile-menu-btn {
        display: block;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .hero-features {
        flex-direction: column;
        align-items: center;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .platform-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    /* IE11 Fallback for mobile */
    @supports not (display: grid) {
        .platform-card {
            flex: 0 0 100%;
            margin: 0.75rem 0;
            max-width: 100%;
        }
    }

    .platform-card {
        padding: 2rem 1.5rem;
        min-height: 180px;
    }

    .platform-icon {
        font-size: 3.5rem;
    }

    .platform-card h3 {
        font-size: 1.25rem;
    }

    .platform-card p {
        font-size: 0.9rem;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .payment-methods {
        flex-direction: column;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .pricing-grid {
        grid-template-columns: 1fr;
    }

    .apps-grid {
        grid-template-columns: 1fr;
    }

    .steps {
        grid-template-columns: 1fr;
    }

    .platform-card {
        padding: 1.5rem 1rem;
        min-height: 160px;
    }

    .platform-icon {
        font-size: 3rem;
    }

    .platform-card h3 {
        font-size: 1.1rem;
    }
    
    .platform-card p {
        font-size: 0.85rem;
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-content {
    animation: fadeInUp 0.6s ease-out;
}

/* Cards animated by JavaScript Intersection Observer */
.feature-card,
.pricing-card,
.app-card,
.platform-card {
    will-change: opacity, transform;
}

/* Класс для анимации при скролле - избегаем forced layout */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Platform Grid (Instructions) */
.instructions-section {
    background: var(--background);
}

.platform-grid {
    display: -webkit-box;
    display: -moz-box;
    display: -ms-flexbox;
    display: -webkit-flex;
    display: flex;
    -webkit-flex-wrap: wrap;
    -ms-flex-wrap: wrap;
    flex-wrap: wrap;
    gap: 2rem;
    max-width: 900px;
    margin: 0 auto;
    width: 100%;
    justify-content: center;
}

/* Modern Grid for supporting browsers */
@supports (display: grid) {
    .platform-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        grid-template-rows: auto;
        gap: 2rem;
    }
}

.platform-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 1rem;
    padding: 2.5rem 2rem;
    text-align: center;
    -webkit-transition: all 0.3s ease;
    -moz-transition: all 0.3s ease;
    -ms-transition: all 0.3s ease;
    -o-transition: all 0.3s ease;
    transition: all 0.3s ease;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    display: -webkit-box;
    display: -moz-box;
    display: -ms-flexbox;
    display: -webkit-flex;
    display: flex;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
    -webkit-flex-direction: column;
    -ms-flex-direction: column;
    flex-direction: column;
    -webkit-box-align: center;
    -webkit-align-items: center;
    -ms-flex-align: center;
    align-items: center;
    -webkit-box-pack: start;
    -webkit-justify-content: flex-start;
    -ms-flex-pack: start;
    justify-content: flex-start;
    box-sizing: border-box;
    min-height: 200px;
    /* Flexbox fallback sizing */
    -webkit-box-flex: 0;
    -webkit-flex: 0 0 calc(50% - 2rem);
    -ms-flex: 0 0 calc(50% - 2rem);
    flex: 0 0 calc(50% - 2rem);
    max-width: calc(50% - 2rem);
}

/* Grid override for modern browsers */
@supports (display: grid) {
    .platform-card {
        flex: none;
        max-width: none;
        width: 100%;
    }
}

.platform-card:hover {
    -webkit-transform: translateY(-8px);
    -moz-transform: translateY(-8px);
    -ms-transform: translateY(-8px);
    -o-transform: translateY(-8px);
    transform: translateY(-8px);
    border-color: var(--primary-color);
    -webkit-box-shadow: 0 10px 30px rgba(99, 102, 241, 0.25);
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.25);
    background: -webkit-linear-gradient(135deg, var(--surface) 0%, rgba(99, 102, 241, 0.05) 100%);
    background: -moz-linear-gradient(135deg, var(--surface) 0%, rgba(99, 102, 241, 0.05) 100%);
    background: linear-gradient(135deg, var(--surface) 0%, rgba(99, 102, 241, 0.05) 100%);
}

.platform-card:active {
    -webkit-transform: translateY(-4px);
    transform: translateY(-4px);
}

.platform-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    display: inline-block;
    line-height: 1;
    flex-shrink: 0;
    width: 100%;
    text-align: center;
}

.platform-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
    color: var(--text);
    margin-top: 0;
    flex-shrink: 0;
}

.platform-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin: 0;
    line-height: 1.5;
    flex-grow: 1;
}

/* Smooth Scroll */
html {
    scroll-behavior: smooth;
}