:root {
            --primary: #1D7BFF;
            --primary-glow: rgba(29, 123, 255, 0.15);
            --accent: rgb(168, 85, 247);
            --accent-glow: rgba(168, 85, 247, 0.15);
            --bg-dark: #070b19;
            --bg-card: #0e162f;
            --text-light: #f3f4f6;
            --text-muted: #9ca3af;
            --border-color: rgba(29, 123, 255, 0.15);
            --max-width: 1200px;
        }

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

        body {
            background-color: var(--bg-dark);
            color: var(--text-light);
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            line-height: 1.6;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: all 0.3s ease;
        }

        
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 100;
            background: rgba(7, 11, 25, 0.85);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
        }

        .header-container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            height: 72px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 12px;
        }

        .logo img {
            display: block;
            height: 36px;
            width: auto;
            max-width: 160px;
            object-fit: contain;
            flex-shrink: 0;
        }

        .logo span {
            display: inline-block;
            font-size: 20px;
            font-weight: 800;
            line-height: 1;
            background: linear-gradient(135deg, #fff 0%, var(--primary) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            white-space: nowrap;
        }

        .nav-desktop {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-muted);
        }

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

        .header-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .btn-header {
            padding: 8px 18px;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 600;
            border: 1px solid var(--border-color);
            background: var(--bg-card);
            color: var(--text-light);
        }

        .btn-header:hover {
            border-color: var(--accent);
            box-shadow: 0 0 15px var(--accent-glow);
        }

        .btn-menu-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-light);
            cursor: pointer;
            padding: 4px;
        }

        
        .drawer {
            position: fixed;
            top: 0;
            left: -100%;
            width: 300px;
            height: 100%;
            background: var(--bg-dark);
            z-index: 200;
            transition: left 0.4s cubic-bezier(0.16, 1, 0.3, 1);
            border-right: 1px solid var(--border-color);
            padding: 30px 24px;
            display: flex;
            flex-direction: column;
            gap: 40px;
        }

        .drawer.active {
            left: 0;
        }

        .drawer-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0,0,0,0.75);
            z-index: 150;
            display: none;
            backdrop-filter: blur(4px);
        }

        .drawer-overlay.active {
            display: block;
        }

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

        .drawer-close {
            background: none;
            border: none;
            color: var(--text-light);
            font-size: 24px;
            cursor: pointer;
        }

        .drawer-nav {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .drawer-link {
            font-size: 18px;
            font-weight: 500;
            color: var(--text-muted);
            padding: 10px 0;
            border-bottom: 1px solid rgba(255,255,255,0.05);
        }

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

        
        .download-hero {
            padding: 160px 0 100px;
            background: radial-gradient(circle at 50% 20%, #0d1a3a 0%, var(--bg-dark) 70%);
            text-align: center;
        }

        .download-hero h1 {
            font-size: 46px;
            font-weight: 800;
            margin-bottom: 20px;
            background: linear-gradient(135deg, #fff 0%, var(--primary) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .download-hero p {
            color: var(--text-muted);
            font-size: 18px;
            max-width: 600px;
            margin: 0 auto 50px;
        }

        .download-grid {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .download-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 40px 30px;
            text-align: center;
            transition: all 0.3s ease;
        }

        .download-card:hover {
            border-color: var(--accent);
            transform: translateY(-8px);
            box-shadow: 0 10px 30px rgba(168, 85, 247, 0.15);
        }

        .platform-icon {
            font-size: 50px;
            color: var(--primary);
            margin-bottom: 24px;
        }

        .download-card h3 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 12px;
            color: #fff;
        }

        .download-card p {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 30px;
            line-height: 1.6;
        }

        .btn-download {
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            color: #fff;
            padding: 12px 28px;
            border-radius: 8px;
            font-weight: 700;
            display: inline-block;
            border: none;
            width: 100%;
        }

        .btn-download:hover {
            box-shadow: 0 5px 15px rgba(168, 85, 247, 0.4);
        }

        
        .step-section {
            padding: 80px 0;
            background: rgba(14, 22, 47, 0.4);
            border-top: 1px solid var(--border-color);
        }

        .step-container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .step-title {
            text-align: center;
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 50px;
        }

        .step-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .step-card {
            background: var(--bg-dark);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 30px;
            position: relative;
        }

        .step-number {
            position: absolute;
            top: 20px;
            right: 20px;
            font-size: 48px;
            font-weight: 800;
            color: rgba(29, 123, 255, 0.15);
            line-height: 1;
        }

        .step-card h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 12px;
            color: #fff;
        }

        .step-card p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        
        .site-footer {
            background: #040710;
            border-top: 1px solid var(--border-color);
            padding: 80px 0 30px;
        }

        .footer-container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            display: grid;
            grid-template-columns: 2fr repeat(3, 1fr);
            gap: 40px;
            margin-bottom: 50px;
        }

        .footer-brand {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .footer-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.8;
            max-width: 320px;
        }

        .footer-title {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 20px;
        }

        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-links a {
            font-size: 14px;
            color: var(--text-muted);
        }

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

        .footer-bottom {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 30px 24px 0;
            border-top: 1px solid rgba(255,255,255,0.05);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
            color: var(--text-muted);
            font-size: 13px;
        }

        @media (max-width: 900px) {
            .download-grid {
                grid-template-columns: 1fr;
            }
            .step-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .nav-desktop, .header-actions {
                display: none;
            }
            .btn-menu-toggle {
                display: block;
            }
            .step-grid {
                grid-template-columns: 1fr;
            }
            .footer-container {
                grid-template-columns: 1fr;
            }
        }