:root {
            --primary-color: #6a0572; /* Deep Purple */
            --secondary-color: #ab02b9; /* Brighter Purple */
            --accent-color: #e63946; /* Vibrant Red */
            --text-light: #e0e0e0;
            --text-dark: #2c0230;
            --bg-dark: rgba(20, 0, 25, 0.95);
            --card-bg: rgba(30, 0, 35, 0.7);
            --border-light: rgba(255, 255, 255, 0.1);
            --zrx-highlight: #ff6b00; /* ZRX distinct orange */
            --glow-color: rgba(171, 2, 185, 0.5); /* Purple glow */
        }

        body {
            font-family: 'Poppins', sans-serif;
            color: var(--text-light);
            line-height: 1.7;
            overflow-x: hidden;
            background: radial-gradient(circle at top left, var(--primary-color) 0%, transparent 40%),
                        radial-gradient(circle at bottom right, var(--secondary-color) 0%, transparent 40%);
            background-size: cover;
            background-repeat: no-repeat;
            min-height: 100vh;
            position: relative;
        }

        /* Particle Background */
        #particles-js {
            position: fixed;
            width: 100%;
            height: 100%;
            top: 0;
            left: 0;
            z-index: -2; /* Below everything else */
            background-color: #1a001a; /* Dark base for particles */
        }

        /* Gradient Overlay for a transparent feel */
        .gradient-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(45deg, rgba(106, 5, 114, 0.3) 0%, rgba(171, 2, 185, 0.3) 100%);
            mix-blend-mode: overlay; /* Blends nicely with particles */
            z-index: -1; /* Above particles, below content */
            animation: gradientShift 20s ease-in-out infinite alternate;
        }

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

        /* Loading Screen */
        .loading-screen {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: var(--bg-dark);
            z-index: 9999;
            display: flex;
            justify-content: center;
            align-items: center;
            transition: opacity 0.5s ease-out;
        }

        .spinner {
            width: 64px;
            height: 64px;
            border: 4px solid rgba(255, 255, 255, 0.3);
            border-top-color: var(--secondary-color);
            border-radius: 50%;
            animation: spin 1s linear infinite;
        }

        @keyframes spin {
            to { transform: rotate(360deg); }
        }

        /* Navbar */
        .navbar {
            background-color: rgba(20, 0, 25, 0.8) !important; /* Semi-transparent dark */
            backdrop-filter: blur(10px);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
            padding-top: 1rem;
            padding-bottom: 1rem;
            transition: all 0.3s ease;
            border-bottom: 1px solid var(--border-light);
        }

        .navbar.scrolled {
            padding-top: 0.75rem;
            padding-bottom: 0.75rem;
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.4);
        }

        .navbar-brand {
            font-weight: 900;
            color: var(--text-light) !important;
            font-size: 2rem;
            display: flex;
            align-items: center;
            text-shadow: 0 0 10px var(--glow-color);
        }

        .navbar-brand i {
            color: var(--secondary-color);
            margin-right: 0.75rem;
            font-size: 2.5rem;
        }

        .navbar-brand .zrx-text {
            color: var(--zrx-highlight);
            font-size: 1.1rem;
            font-weight: 700;
            margin-left: 8px;
            letter-spacing: 1px;
            opacity: 0.9;
        }

        .nav-link {
            font-weight: 600;
            color: var(--text-light) !important;
            margin: 0 1rem;
            position: relative;
            transition: color 0.3s ease, transform 0.2s ease;
            padding: 0.5rem 0;
            font-size: 1.05rem;
        }

        .nav-link:hover, .nav-link.active {
            color: var(--secondary-color) !important;
            transform: translateY(-2px);
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background-color: var(--secondary-color);
            border-radius: 2px;
            transform: scaleX(1);
            transition: transform 0.3s ease;
        }

        .nav-link:not(.active)::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background-color: var(--secondary-color);
            border-radius: 2px;
            transform: scaleX(0);
            transition: transform 0.3s ease;
        }

        .nav-link:not(.active):hover::after {
            transform: scaleX(1);
        }

        .btn-custom {
            background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
            border: none;
            padding: 1rem 2.2rem;
            font-weight: 700;
            border-radius: 12px;
            transition: all 0.3s ease;
            font-size: 1.15rem;
            box-shadow: 0 8px 25px var(--glow-color);
            position: relative;
            overflow: hidden;
            z-index: 1;
            color: var(--text-light);
        }

        .btn-custom::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: rgba(255, 255, 255, 0.15);
            transform: skewX(-30deg);
            transition: 0.5s;
            z-index: -1;
        }

        .btn-custom:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 35px var(--glow-color);
            color: var(--text-light);
        }

        .btn-custom:hover::before {
            left: 100%;
        }

        .btn-outline-custom {
            color: var(--secondary-color);
            border: 2px solid var(--secondary-color);
            padding: 1rem 2.2rem;
            font-weight: 700;
            border-radius: 12px;
            transition: all 0.3s ease;
            font-size: 1.15rem;
            background-color: transparent;
            box-shadow: 0 0 10px rgba(171, 2, 185, 0.2);
        }

        .btn-outline-custom:hover {
            background-color: var(--secondary-color);
            color: var(--text-light);
            transform: translateY(-5px);
            box-shadow: 0 8px 25px var(--glow-color);
        }

        /* Sections */
        section {
            padding: 8rem 0;
            position: relative;
            z-index: 1;
        }

        .hero-section {
            padding: 12rem 0 10rem;
            text-align: center;
        }

        .hero-section h1 {
            font-weight: 900;
            margin-bottom: 1.8rem;
            line-height: 1.25;
            font-size: 4.5rem;
            color: var(--text-light);
            text-shadow: 0 0 20px var(--glow-color);
        }

        .hero-section h1 strong {
            color: var(--zrx-highlight);
            text-shadow: 0 0 15px rgba(255, 107, 0, 0.7);
        }

        .hero-section p {
            font-size: 1.4rem;
            color: var(--text-light);
            margin-bottom: 3.5rem;
            max-width: 800px;
            margin-left: auto;
            margin-right: auto;
            opacity: 0.9;
        }

        .hero-image-container {
            width: 100%;
            max-width: 700px;
            margin: 4rem auto 0;
            border-radius: 25px;
            overflow: hidden;
            background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
            padding: 10px;
            box-shadow: 0 35px 80px rgba(0, 0, 0, 0.4);
            animation: floatImage 3s ease-in-out infinite alternate;
        }

        .hero-image-container img {
            border-radius: 20px;
            display: block;
            width: 100%;
            height: auto;
            object-fit: cover;
        }

        @keyframes floatImage {
            0% { transform: translateY(0); }
            100% { transform: translateY(-15px); }
        }

        .section-heading {
            font-weight: 900;
            margin-bottom: 1.5rem;
            position: relative;
            display: inline-block;
            font-size: 3.8rem;
            color: var(--text-light);
            text-shadow: 0 0 15px rgba(255, 255, 255, 0.1);
        }

        .section-heading strong {
            color: var(--zrx-highlight);
        }

        .section-heading::after {
            content: '';
            position: absolute;
            bottom: -15px;
            left: 50%;
            transform: translateX(-50%);
            width: 90px;
            height: 6px;
            background-color: var(--secondary-color);
            border-radius: 3px;
            box-shadow: 0 0 10px var(--glow-color);
        }

        .section-subheading {
            color: var(--text-light);
            font-size: 1.3rem;
            margin-bottom: 5rem;
            max-width: 850px;
            margin-left: auto;
            margin-right: auto;
            opacity: 0.8;
        }

        /* Cards */
        .card-custom {
            background-color: var(--card-bg);
            border: 1px solid var(--border-light);
            border-radius: 20px;
            overflow: hidden;
            transition: all 0.5s cubic-bezier(0.25, 0.8, 0.25, 1);
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
            height: 100%;
            display: flex;
            flex-direction: column;
            position: relative;
            padding-bottom: 1rem; /* Space for button */
        }

        .card-custom:hover {
            transform: translateY(-15px) scale(1.02);
            box-shadow: 0 25px 60px rgba(0, 0, 0, 0.35);
            border-color: var(--secondary-color);
        }

        .card-custom.active { /* For dynamic styling */
            border-color: var(--secondary-color) !important;
            box-shadow: 0 15px 40px var(--glow-color) !important;
        }

        .card-image-container {
            height: 250px;
            overflow: hidden;
            position: relative;
            border-top-left-radius: 20px;
            border-top-right-radius: 20px;
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 2rem;
            background: linear-gradient(45deg, var(--primary-color), var(--secondary-color)); /* Default */
        }

        .card-image-container::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background:
                radial-gradient(circle at 20% 20%, rgba(255,255,255,0.08) 0%, transparent 60%),
                radial-gradient(circle at 80% 80%, rgba(255,255,255,0.08) 0%, transparent 60%);
            z-index: 0;
        }

        .card-image-container img {
            width: 130px;
            height: 130px;
            object-fit: contain;
            transition: transform 0.6s ease, filter 0.6s ease;
            position: relative;
            z-index: 1;
            background-color: rgba(255, 255, 255, 0.9);
            border-radius: 50%;
            padding: 15px;
            box-shadow: 0 8px 25px rgba(0,0,0,0.2);
            border: 3px solid rgba(255, 255, 255, 0.2);
        }

        .card-custom:hover .card-image-container img {
            transform: scale(1.15) rotate(5deg);
            filter: brightness(1.1);
        }

        .card-body {
            padding: 2.5rem;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
            text-align: center;
        }

        .card-title {
            font-weight: 800;
            font-size: 2rem;
            margin-bottom: 1rem;
            color: var(--text-light);
            text-shadow: 0 0 8px rgba(255, 255, 255, 0.1);
            background: linear-gradient(45deg, var(--text-light), var(--secondary-color)); /* Default gradient */
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .card-text {
            color: var(--text-light);
            margin-bottom: 2rem;
            font-size: 1.05rem;
            line-height: 1.7;
            opacity: 0.85;
            flex-grow: 1;
        }

        .badge-custom {
            font-weight: 700;
            padding: 0.4rem 1.2rem;
            border-radius: 50px;
            font-size: 0.85rem;
            position: absolute;
            top: 20px;
            right: 20px;
            z-index: 2;
            text-transform: uppercase;
            letter-spacing: 0.8px;
            box-shadow: 0 3px 15px rgba(0,0,0,0.2);
            color: var(--text-light);
        }

        .badge-custom.new { background-color: #00b894; /* Green */ }
        .badge-custom.hot { background-color: #d63031; /* Red */ }
        .badge-custom.popular { background-color: #0984e3; /* Blue */ }

        .download-btn {
            background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
            border: none;
            color: var(--text-light);
            padding: 1rem 2.2rem;
            font-weight: 600;
            border-radius: 12px;
            width: 100%;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
            box-shadow: 0 8px 25px var(--glow-color);
            margin-top: auto; /* Push to bottom */
            border: 2px solid transparent; /* Default */
        }

        .download-btn:hover {
            background: linear-gradient(45deg, var(--secondary-color), var(--primary-color));
            transform: translateY(-5px);
            box-shadow: 0 12px 35px var(--glow-color);
            color: var(--text-light);
        }

        /* Features Section */
        .feature-card {
            background-color: var(--card-bg);
            border: 1px solid var(--border-light);
            border-radius: 20px;
            padding: 3.5rem;
            height: 100%;
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
            transition: all 0.5s cubic-bezier(0.25, 0.8, 0.25, 1);
            position: relative;
            overflow: hidden;
        }

        .feature-card:hover {
            transform: translateY(-15px) scale(1.02);
            box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
            border-color: var(--secondary-color);
        }

        .feature-icon {
            width: 80px;
            height: 80px;
            border-radius: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 2.5rem;
            color: var(--text-light);
            font-size: 3rem;
            box-shadow: 0 8px 20px rgba(0,0,0,0.2);
            position: relative;
            z-index: 1;
            background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
        }

        .feature-title {
            font-weight: 800;
            font-size: 2rem;
            margin-bottom: 1.5rem;
            color: var(--text-light);
            text-shadow: 0 0 10px rgba(255, 255, 255, 0.1);
        }

        .feature-text {
            color: var(--text-light);
            font-size: 1.1rem;
            line-height: 1.8;
            opacity: 0.85;
        }

        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, rgba(106, 5, 114, 0.8), rgba(171, 2, 185, 0.8));
            backdrop-filter: blur(5px);
            box-shadow: inset 0 15px 40px rgba(0,0,0,0.3);
            color: var(--text-light);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }

        .cta-section .section-heading, .cta-section .section-subheading {
            color: var(--text-light);
        }

        /* Telegram Section */
        .telegram-section {
            background-color: var(--bg-dark);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }

        .telegram-icon {
            font-size: 6rem;
            color: #0088cc; /* Telegram brand color */
            margin-bottom: 2.5rem;
            animation: pulse-telegram 2.5s infinite ease-in-out;
            text-shadow: 0 0 30px rgba(0, 136, 204, 0.6);
        }

        @keyframes pulse-telegram {
            0% { transform: scale(1); opacity: 1; }
            50% { transform: scale(1.1); opacity: 0.85; }
            100% { transform: scale(1); opacity: 1; }
        }

        .btn-telegram {
            background-color: #0088cc;
            border: none;
            color: var(--text-light);
            padding: 1.1rem 2.8rem;
            font-weight: 700;
            border-radius: 12px;
            transition: all 0.3s ease;
            font-size: 1.25rem;
            box-shadow: 0 8px 25px rgba(0, 136, 204, 0.35);
        }

        .btn-telegram:hover {
            background-color: #006699;
            transform: translateY(-5px);
            box-shadow: 0 12px 35px rgba(0, 136, 204, 0.5);
        }

        /* Footer */
        .footer {
            padding: 5rem 0 2.5rem;
            background-color: var(--bg-dark);
            color: var(--text-light);
            border-top: 1px solid var(--border-light);
        }

        .footer-title {
            font-weight: 900;
            margin-bottom: 2rem;
            display: flex;
            align-items: center;
            font-size: 2rem;
            text-shadow: 0 0 8px var(--glow-color);
        }

        .footer-title i {
            margin-right: 0.8rem;
            color: var(--secondary-color);
            font-size: 2.5rem;
        }

        .footer-title .zrx-text {
            color: var(--zrx-highlight);
            font-size: 1.3rem;
            font-weight: 700;
            margin-left: 10px;
            letter-spacing: 1px;
            opacity: 0.9;
        }

        .footer-text {
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 2.5rem;
            line-height: 1.8;
            font-size: 1rem;
        }

        .footer-links h6 {
            font-weight: 700;
            margin-bottom: 1.8rem;
            color: var(--text-light);
            font-size: 1.2rem;
        }

        .footer-links ul {
            list-style: none;
            padding: 0;
        }

        .footer-links li {
            margin-bottom: 1rem;
        }

        .footer-links a {
            color: rgba(255, 255, 255, 0.75);
            text-decoration: none;
            transition: color 0.3s ease;
            font-size: 1rem;
        }

        .footer-links a:hover {
            color: var(--secondary-color);
            text-decoration: underline;
        }

        .social-icons a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background-color: rgba(255, 255, 255, 0.15);
            color: var(--text-light);
            margin-right: 1.2rem;
            transition: all 0.3s ease;
            font-size: 1.6rem;
            box-shadow: 0 5px 12px rgba(0,0,0,0.1);
        }

        .social-icons a:hover {
            background-color: var(--secondary-color);
            transform: translateY(-4px) scale(1.08);
            box-shadow: 0 8px 20px var(--glow-color);
        }

        .footer-divider {
            border-color: rgba(255, 255, 255, 0.2);
            margin: 3rem 0;
        }

        .footer-bottom {
            color: rgba(255, 255, 255, 0.65);
            font-size: 0.95rem;
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.8);
            text-decoration: none;
            transition: color 0.2s ease;
        }

        .footer-bottom a:hover {
            color: var(--secondary-color);
            text-decoration: underline;
        }

        .developer-credit {
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.9rem;
            margin-top: 1.5rem;
        }
        .developer-credit a {
            color: var(--secondary-color);
            font-weight: 700;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        .developer-credit a:hover {
            text-decoration: underline;
            color: var(--text-light);
        }

        /* Responsive Adjustments */
        @media (max-width: 992px) {
            .hero-section h1 { font-size: 3.5rem; }
            .section-heading { font-size: 3rem; }
            .card-body { padding: 2rem; }
            .feature-card { padding: 3rem; }
        }

        @media (max-width: 768px) {
            .hero-section { padding: 10rem 0 8rem; }
            .hero-section h1 { font-size: 2.8rem; }
            .hero-section p { font-size: 1.2rem; }
            .section-heading { font-size: 2.5rem; }
            .section-subheading { margin-bottom: 3.5rem; }
            .feature-icon { margin-left: auto; margin-right: auto; }
            .footer-links, .social-icons { text-align: center; margin-top: 2.5rem; }
            .footer-bottom { text-align: center !important; }
            .navbar-toggler { border-color: rgba(255,255,255,0.2); }
            .navbar-brand { font-size: 1.8rem; }
            .navbar-brand i { font-size: 2.2rem; }
            .navbar-brand .zrx-text { font-size: 0.9rem; }
        }

        @media (max-width: 576px) {
            .hero-section h1 { font-size: 2.2rem; }
            .hero-section p { font-size: 1rem; }
            .btn-custom, .btn-outline-custom { padding: 0.8rem 1.6rem; font-size: 1rem; }
            .section-heading { font-size: 2rem; }
            .card-title { font-size: 1.6rem; }
            .card-text { font-size: 0.95rem; }
            .feature-card { padding: 2rem; }
            .feature-icon { width: 60px; height: 60px; font-size: 2.5rem; }
            .telegram-icon { font-size: 4.5rem; }
            .btn-telegram { padding: 1rem 2rem; font-size: 1.1rem; }
        }