:root {
      --primary-color: #1D7BFF;
      --accent-color: rgb(139,92,246);
      --accent-gradient: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
      --bg-dark: #0A0F1D;
      --bg-card-dark: #121826;
      --text-light: #F3F4F6;
      --text-muted: #9CA3AF;
      --border-dark: rgba(255, 255, 255, 0.08);
      --bg-light: #F8FAFC;
      --text-dark: #0F172A;
      --border-light: #E2E8F0;
      --card-shadow: 0 10px 30px -10px rgba(0,0,0,0.3);
      --container-width: 1200px;
    }

    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      background-color: var(--bg-light);
      color: var(--text-dark);
      line-height: 1.6;
    }
    a { color: inherit; text-decoration: none; transition: all 0.3s; }
    .container { max-width: var(--container-width); margin: 0 auto; padding: 0 20px; }

    
    .site-header { position: fixed; top: 0; left: 0; width: 100%; z-index: 100; background: rgba(10, 15, 29, 0.85); backdrop-filter: blur(12px); border-bottom: 1px solid var(--border-dark); color: var(--text-light); }
    .header-container { display: flex; align-items: center; justify-content: space-between; height: 72px; max-width: var(--container-width); margin: 0 auto; padding: 0 20px; }
    .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: 18px; font-weight: 800; line-height: 1; color: var(--text-light); white-space: nowrap; }
    .desktop-nav { display: flex; align-items: center; gap: 32px; }
    .desktop-nav a { font-size: 15px; font-weight: 500; color: var(--text-muted); }
    .desktop-nav a:hover { color: var(--primary-color); }
    .header-actions { display: flex; align-items: center; gap: 16px; }
    .btn { display: inline-flex; align-items: center; justify-content: center; padding: 10px 20px; border-radius: 8px; font-size: 14px; font-weight: 600; cursor: pointer; transition: all 0.3s; border: none; }
    .btn-primary { background: var(--accent-gradient); color: #fff; }
    .mobile-menu-toggle { display: none; flex-direction: column; gap: 6px; background: none; border: none; cursor: pointer; }
    .mobile-menu-toggle span { display: block; width: 24px; height: 2px; background-color: var(--text-light); }
    
    .drawer-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0, 0, 0, 0.6); backdrop-filter: blur(4px); z-index: 199; opacity: 0; visibility: hidden; transition: all 0.3s; }
    .drawer-overlay.active { opacity: 1; visibility: visible; }
    .drawer-navigation { position: fixed; top: 0; left: -300px; width: 300px; height: 100%; background: var(--bg-dark); border-right: 1px solid var(--border-dark); z-index: 200; display: flex; flex-direction: column; transition: all 0.3s; }
    .drawer-navigation.active { left: 0; }
    .drawer-header { display: flex; align-items: center; justify-content: space-between; padding: 20px; border-bottom: 1px solid var(--border-dark); color: var(--text-light); }
    .drawer-close { background: none; border: none; color: var(--text-light); font-size: 28px; cursor: pointer; }
    .drawer-body { flex: 1; overflow-y: auto; padding: 30px 20px; }
    .drawer-nav { display: flex; flex-direction: column; gap: 20px; }
    .drawer-nav a { font-size: 16px; font-weight: 500; color: var(--text-muted); padding: 10px 0; border-bottom: 1px solid rgba(255, 255, 255, 0.03); }
    .drawer-footer { padding: 20px; border-top: 1px solid var(--border-dark); text-align: center; }

    
    .download-header {
      background: radial-gradient(circle at 50% 50%, rgba(29, 123, 255, 0.1) 0%, var(--bg-dark) 100%);
      color: var(--text-light);
      padding: 140px 0 80px;
      text-align: center;
    }
    .download-header h1 { font-size: 36px; margin-bottom: 16px; }
    .download-header p { color: var(--text-muted); max-width: 600px; margin: 0 auto; }

    
    .download-section { padding: 80px 0; }
    .download-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 40px; margin-bottom: 60px; }
    .download-card { background: #fff; border: 1px solid var(--border-light); border-radius: 16px; padding: 40px; transition: all 0.3s; }
    .download-card:hover { transform: translateY(-5px); box-shadow: 0 15px 35px rgba(0,0,0,0.05); }
    .download-card h3 { font-size: 24px; margin-bottom: 12px; }
    .download-card p { color: var(--text-muted); margin-bottom: 30px; font-size: 14px; }
    .download-btn-group { display: flex; gap: 16px; }

    
    .install-steps { background: #F8FAFC; padding: 80px 0; }
    .steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
    .step-card { background: #fff; border-radius: 12px; padding: 30px; border: 1px solid var(--border-light); position: relative; }
    .step-num { position: absolute; top: -20px; left: 30px; width: 40px; height: 40px; background: var(--accent-gradient); color: #fff; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: 18px; }
    .step-card h4 { margin-top: 10px; font-size: 18px; margin-bottom: 12px; }
    .step-card p { color: var(--text-muted); font-size: 14px; }

    
    .site-footer { background-color: #070B14; color: var(--text-muted); border-top: 1px solid var(--border-dark); padding: 80px 0 30px; }
    .footer-container { display: grid; grid-template-columns: 2fr repeat(3, 1fr); gap: 50px; max-width: var(--container-width); margin: 0 auto; padding: 0 20px; }
    .footer-brand .logo { margin-bottom: 20px; }
    .brand-desc { font-size: 14px; line-height: 1.6; margin-bottom: 24px; }
    .social-links { display: flex; flex-direction: column; gap: 10px; }
    .social-icon { font-size: 13px; color: var(--text-light); display: flex; align-items: center; gap: 8px; }
    .footer-links-group h4 { color: var(--text-light); font-size: 16px; margin-bottom: 24px; }
    .footer-links-group ul { list-style: none; }
    .footer-links-group ul li { margin-bottom: 12px; }
    .footer-links-group ul li a { font-size: 14px; }
    .footer-links-group ul li a:hover { color: var(--primary-color); }
    .compliance-text { font-size: 12px; line-height: 1.8; color: #52617a; }
    .footer-bottom { border-top: 1px solid var(--border-dark); padding-top: 30px; margin-top: 60px; text-align: center; font-size: 12px; }

    @media (max-width: 992px) {
      .desktop-nav { display: none; }
      .mobile-menu-toggle { display: flex; }
      .download-grid { grid-template-columns: 1fr; }
      .steps-grid { grid-template-columns: 1fr; gap: 40px; }
      .footer-container { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 768px) {
      .footer-container { grid-template-columns: 1fr; }
    }