:root {
            --color-background: #1A1A1A; /* Charcoal */
            --color-surface: #2C2C2C;   /* Dark Gray */
            --color-accent: #FFBF00;   /* Amber */
            --color-text: #F5F5F5;      /* White */
            --color-text-muted: #a0a0a0;
            --font-headings: 'Georgia', 'Times New Roman', serif;
            --font-body: 'Helvetica', 'Arial', sans-serif;
            --container-width: 1100px;
            --nav-height: 70px;
        }

        /* --- Base & Typography --- */
        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            font-size: 16px;
            scroll-behavior: smooth;
        }

        body {
            background-color: var(--color-background);
            color: var(--color-text);
            font-family: var(--font-body);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        h1, h2, h3, h4, h5, h6 {
            font-family: var(--font-headings);
            color: var(--color-text);
            line-height: 1.2;
            margin-bottom: 1rem;
        }

        h1 { font-size: 3.5rem; }
        h2 { font-size: 2.5rem; }
        h3 { font-size: 1.5rem; }

        p {
            margin-bottom: 1.5rem;
            color: var(--color-text-muted);
        }

        a {
            color: var(--color-accent);
            text-decoration: none;
            transition: color 0.3s ease;
        }

        a:hover {
            color: var(--color-text);
        }
        
        ul, ol {
            padding-left: 20px;
            margin-bottom: 1.5rem;
        }

        li {
            margin-bottom: 0.5rem;
        }

        b, strong {
            color: var(--color-text);
            font-weight: 600;
        }
        
        .quantum-container {
            width: 100%;
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 20px;
        }

        .quantum-section {
            padding: 80px 0;
            overflow: hidden;
        }

        /* --- Animations --- */
        .reveal-on-scroll {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.8s ease-out, transform 0.8s ease-out;
        }

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

        /* --- Header & Navigation --- */
        .main-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--nav-height);
            z-index: 1000;
            display: flex;
            align-items: center;
            background-color: rgba(26, 26, 26, 0.8);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--color-surface);
        }

        .nav-wrapper {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
        }

        .logo-brand a {
            font-family: var(--font-headings);
            font-size: 1.5rem;
            font-weight: bold;
            color: var(--color-text);
        }

        .main-navigation {
            display: flex;
            align-items: center;
            gap: 25px;
        }

        .nav-item {
            font-size: 1rem;
            font-weight: 500;
            color: var(--color-text-muted);
            padding: 10px 0;
            position: relative;
            transition: color 0.3s ease;
        }
        .nav-item:hover {
            color: var(--color-text);
        }

        .nav-item::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background-color: var(--color-accent);
            transform: scaleX(0);
            transform-origin: right;
            transition: transform 0.4s cubic-bezier(0.19, 1, 0.22, 1);
        }
        .nav-item:hover::after {
            transform: scaleX(1);
            transform-origin: left;
        }
        
        .dropdown {
            position: relative;
        }

        .dropdown-toggle {
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        
        .dropdown-toggle .arrow {
            font-size: 0.8em;
            transition: transform 0.3s ease;
        }
        
        .dropdown-menu {
            display: none;
            position: absolute;
            top: 100%;
            left: 0;
            margin-top: 15px;
            background-color: var(--color-surface);
            border: 1px solid #3a3a3a;
            border-radius: 8px;
            min-width: 220px;
            padding: 10px;
            z-index: 1001;
            box-shadow: 0 10px 25px rgba(0,0,0,0.3);
        }
        
        .dropdown-menu.show {
            display: block;
        }

        .dropdown-item {
            display: block;
            padding: 10px 15px;
            color: var(--color-text-muted);
            border-radius: 5px;
            transition: background-color 0.2s ease, color 0.2s ease;
        }
        .dropdown-item:hover {
            background-color: #383838;
            color: var(--color-text);
        }

        /* --- Hero Section --- */
        .hero-section {
            height: 80vh;
            min-height: 600px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            text-align: center;
            padding-top: var(--nav-height);
            position: relative;
        }
        
        .hero-section::after {
            content: '';
            position: absolute;
            bottom: 10px;
            left: 50%;
            transform: translateX(-50%);
            width: 2px;
            height: 40px;
            background-color: var(--color-accent);
            opacity: 0.5;
        }

        .hero-headline {
            max-width: 900px;
            margin-bottom: 1.5rem;
        }
        
        .hero-headline .cyrillic-part{
            font-style: italic;
        }

        .hero-subheadline {
            max-width: 650px;
            font-size: 1.1rem;
            margin-bottom: 2.5rem;
        }

        .cta-button {
            display: inline-block;
            padding: 15px 40px;
            background-color: var(--color-accent);
            color: var(--color-background);
            font-size: 1.1rem;
            font-weight: bold;
            border-radius: 50px;
            border: 2px solid var(--color-accent);
            transition: background-color 0.3s ease, color 0.3s ease, transform 0.3s ease;
        }

        .cta-button:hover {
            background-color: transparent;
            color: var(--color-accent);
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(255, 191, 0, 0.2);
        }

        /* --- Benefits Section --- */
        .benefits-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .benefit-card {
            background-color: var(--color-surface);
            padding: 30px;
            border-radius: 12px;
            border: 1px solid transparent;
            transition: border-color 0.3s ease, transform 0.3s ease;
        }
        
        .benefit-card:hover {
            transform: translateY(-5px);
            border-color: var(--color-accent);
        }

        .benefit-icon {
            margin-bottom: 20px;
        }
        
        .benefit-icon svg {
            width: 48px;
            height: 48px;
            stroke: var(--color-accent);
        }

        /* --- How It Works Section --- */
        .how-it-works-flow {
            display: flex;
            justify-content: space-between;
            position: relative;
        }
        
        .how-it-works-flow::before {
            content: '';
            position: absolute;
            top: 40px;
            left: 10%;
            right: 10%;
            height: 2px;
            background: repeating-linear-gradient(90deg, var(--color-accent), var(--color-accent) 6px, transparent 6px, transparent 12px);
            opacity: 0.4;
        }

        .step-item {
            flex: 1;
            text-align: center;
            padding: 0 20px;
            position: relative;
        }
        
        .step-number {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            border: 2px solid var(--color-accent);
            display: flex;
            justify-content: center;
            align-items: center;
            margin: 0 auto 25px auto;
            background: var(--color-background);
            font-size: 2rem;
            font-family: var(--font-headings);
            color: var(--color-accent);
        }
        
        .step-item p {
            font-size: 0.9rem;
        }

        /* --- Article Section --- */
        .article-container {
            background-color: var(--color-surface);
            padding: 50px 60px;
            border-radius: 15px;
        }

        .article-container h2 {
            font-size: 2rem;
            color: var(--color-accent);
            padding-bottom: 10px;
            border-bottom: 1px solid #444;
            margin-top: 2rem;
            margin-bottom: 1.5rem;
        }
        
        .article-container h2:first-of-type {
            margin-top: 0;
        }
        
        .article-container p {
            color: var(--color-text);
            margin-bottom: 1rem;
        }
        
        .article-container img {
            width: 100%;
            height: auto;
            border-radius: 8px;
            margin: 2rem 0;
            display: block;
        }
        
        .article-container table {
            width: 100%;
            border-collapse: collapse;
            margin: 2rem 0;
            background-color: #1e1e1e;
        }

        .article-container th, .article-container td {
            text-align: left;
            padding: 12px 15px;
            border: 1px solid #444;
        }

        .article-container th {
            background-color: var(--color-accent);
            color: var(--color-background);
            font-family: var(--font-body);
        }
        
        .article-container td {
            color: var(--color-text-muted);
        }
        
        .article-container li {
            color: var(--color-text);
        }

        /* --- FAQ Section --- */
        .faq-item {
            border-bottom: 1px solid var(--color-surface);
            padding: 25px 0;
        }
        
        .faq-question {
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 1.2rem;
            font-weight: 500;
        }
        
        .faq-question h3 {
            margin: 0;
        }
        
        .faq-icon {
            width: 30px;
            height: 30px;
            min-width: 30px;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 1.5px solid var(--color-text-muted);
            border-radius: 50%;
            font-family: var(--font-headings);
            font-size: 1.2rem;
            transition: transform 0.3s ease, background-color 0.3s ease, border-color 0.3s ease;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.5s cubic-bezier(0, 1, 0, 1), padding-top 0.5s ease;
        }
        .faq-answer p {
            padding-right: 40px;
            margin-bottom: 0px;
        }
        
        .faq-item.active .faq-answer {
            max-height: 1000px;
            padding-top: 20px;
            transition: max-height 1s ease-in-out, padding-top 0.5s ease;
        }
        
        .faq-item.active .faq-icon {
            transform: rotate(180deg);
            background-color: var(--color-accent);
            border-color: var(--color-accent);
            color: var(--color-background);
        }

        /* --- Testimonials --- */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }
        .testimonial-card {
            background-color: var(--color-surface);
            padding: 30px;
            border-radius: 12px;
            display: flex;
            flex-direction: column;
        }
        .testimonial-header {
            display: flex;
            align-items: center;
            margin-bottom: 20px;
        }
        .testimonial-avatar {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background-color: var(--color-accent);
            color: var(--color-background);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            font-size: 1.2rem;
            margin-right: 15px;
        }
        .testimonial-author-info h4 {
            margin: 0;
        }
        .testimonial-author-info span {
            font-size: 0.9rem;
            color: var(--color-text-muted);
        }
        .testimonial-body {
            font-style: italic;
            color: var(--color-text-muted);
        }
        
        /* --- Product Composition --- */
        .composition-list {
            list-style: none;
            padding: 0;
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 15px 30px;
        }
        .composition-item {
            display: flex;
            align-items: center;
            padding: 10px;
            background-color: var(--color-surface);
            border-radius: 8px;
        }
        .composition-icon {
            margin-right: 15px;
            color: var(--color-accent);
        }
        .composition-icon svg { width: 24px; height: 24px; }


        /* --- Footer --- */
        .main-footer {
            background-color: #111;
            padding: 60px 0;
            border-top: 3px solid var(--color-accent);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
        }
        .footer-col h4 {
            font-family: var(--font-body);
            font-size: 1.1rem;
            margin-bottom: 20px;
            color: var(--color-accent);
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .footer-links {
            list-style: none;
            padding: 0;
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-links a {
            color: var(--color-text-muted);
        }
        .footer-links a:hover {
            color: var(--color-text);
            padding-left: 5px;
        }
        .footer-bottom {
            margin-top: 60px;
            padding-top: 30px;
            border-top: 1px solid var(--color-surface);
            text-align: center;
            font-size: 0.9rem;
            color: var(--color-text-muted);
        }
        .footer-logo {
            font-family: var(--font-headings);
            font-size: 2rem;
            margin-bottom: 20px;
        }

        /* --- Responsive Design --- */
        @media (max-width: 992px) {
            h1 { font-size: 2.8rem; }
            h2 { font-size: 2rem; }
            .quantum-section { padding: 60px 0; }
            .benefits-grid { grid-template-columns: repeat(2, 1fr); }
            .how-it-works-flow { flex-direction: column; align-items: center; gap: 40px; }
            .how-it-works-flow::before { display: none; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .testimonial-grid { grid-template-columns: 1fr; }
        }

        @media (max-width: 768px) {
            .nav-wrapper { flex-direction: column; gap: 10px; }
            .main-header { height: auto; padding: 10px 0; }
            .main-navigation { flex-wrap: wrap; justify-content: center; gap: 15px; }
            .hero-section { min-height: 500px; height: auto; padding: 100px 0 60px 0; }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            .benefits-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; text-align: center; }
            .footer-links a:hover { padding-left: 0; }
            .composition-list { grid-template-columns: 1fr; }
            .article-container { padding: 30px 20px; }            
        }







.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 30px;
}

.blog-card {
    background-color: var(--color-surface);
    border-radius: 12px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid #3a3a3a;
}

.blog-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    border-color: var(--color-accent);
}

.blog-card-image-link {
    display: block;
}

.blog-card-image-link img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
    transition: transform 0.3s ease;
}

.blog-card:hover .blog-card-image-link img {
    transform: scale(1.05);
}

.blog-card-content {
    padding: 25px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.blog-card-title {
    font-size: 1.25rem;
    line-height: 1.4;
    margin: 0 0 15px 0;
    font-family: var(--font-headings);
}

.blog-card-title a {
    color: var(--color-text);
    text-decoration: none;
}

.blog-card-title a:hover {
    color: var(--color-accent);
}

.blog-card-description {
    color: var(--color-text-muted);
    font-size: 1rem;
    flex-grow: 1;
    margin-bottom: 20px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.blog-card-read-more {
    color: var(--color-accent);
    font-weight: bold;
    text-decoration: none;
    align-self: flex-start;
    transition: color 0.3s ease;
}

.blog-card-read-more:hover {
    color: var(--color-text);
}

@media (max-width: 768px) {
    .blog-grid {
        grid-template-columns: 1fr;
    }
}