:root {
      --primary-blue: #1D7BFF;
      --accent-purple: rgb(126, 34, 206);
      --accent-purple-glow: rgba(126, 34, 206, 0.35);
      --bg-dark: #070913;
      --bg-card: rgba(15, 22, 42, 0.7);
      --border-color: rgba(29, 123, 255, 0.15);
      --border-light: rgba(255, 255, 255, 0.08);
      --text-white: #F8FAFC;
      --text-muted: #94A3B8;
      --max-width: 1200px;
      --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    }

    * { box-sizing: border-box; margin: 0; padding: 0; }
    body { background-color: var(--bg-dark); color: var(--text-white); font-family: var(--font-family); line-height: 1.6; }
    a { color: inherit; text-decoration: none; transition: all 0.3s ease; }
    .container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }

    
    .site-header { background: rgba(7, 9, 19, 0.85); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border-bottom: 1px solid var(--border-light); position: fixed; top: 0; left: 0; width: 100%; z-index: 1000; height: 70px; display: flex; align-items: center; }
    .header-inner { display: flex; justify-content: space-between; align-items: center; width: 100%; }
    .logo { display: inline-flex; align-items: center; gap: 12px; }
    .logo img { display: block; height: 38px; 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-white); letter-spacing: 0.5px; white-space: nowrap; }
    .nav-desktop { display: flex; gap: 30px; }
    .nav-desktop a { font-size: 15px; font-weight: 500; color: var(--text-muted); }
    .nav-desktop a:hover, .nav-desktop a.active { color: var(--primary-blue); text-shadow: 0 0 10px rgba(29, 123, 255, 0.5); }
    .header-actions { display: flex; align-items: center; gap: 15px; }
    .btn { display: inline-flex; align-items: center; justify-content: center; padding: 10px 22px; border-radius: 8px; font-weight: 600; font-size: 14px; transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1); cursor: pointer; border: none; }
    .btn-primary { background: linear-gradient(135deg, var(--primary-blue), var(--accent-purple)); color: var(--text-white); box-shadow: 0 4px 20px rgba(126, 34, 206, 0.3); }
    .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 24px rgba(126, 34, 206, 0.5); }
    .drawer-trigger { display: none; flex-direction: column; gap: 6px; background: none; border: none; cursor: pointer; padding: 4px; }
    .drawer-trigger span { display: block; width: 24px; height: 2px; background-color: var(--text-white); }
    .mobile-drawer-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0, 0, 0, 0.7); backdrop-filter: blur(4px); z-index: 1100; opacity: 0; pointer-events: none; transition: opacity 0.3s ease; }
    .mobile-drawer-overlay.active { opacity: 1; pointer-events: auto; }
    .mobile-drawer { position: fixed; top: 0; left: -280px; width: 280px; height: 100%; background: var(--bg-dark); border-right: 1px solid var(--border-light); z-index: 1200; padding: 24px; display: flex; flex-direction: column; transition: left 0.3s cubic-bezier(0.4, 0, 0.2, 1); }
    .mobile-drawer.active { left: 0; }
    .drawer-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 40px; }
    .drawer-close { font-size: 28px; background: none; border: none; color: var(--text-white); cursor: pointer; }
    .drawer-nav { display: flex; flex-direction: column; gap: 20px; }
    .drawer-nav a { font-size: 16px; font-weight: 500; color: var(--text-muted); padding: 8px 0; border-bottom: 1px solid rgba(255,255,255,0.02); }
    .drawer-nav a:hover { color: var(--primary-blue); }

    
    .download-hero {
      padding: 150px 0 80px;
      background: radial-gradient(circle at 50% 30%, rgba(29, 123, 255, 0.15) 0%, transparent 60%);
      text-align: center;
    }

    .download-hero h1 {
      font-size: 42px;
      font-weight: 800;
      margin-bottom: 15px;
    }

    .download-hero p {
      color: var(--text-muted);
      font-size: 18px;
      max-width: 700px;
      margin: 0 auto 40px;
    }

    
    .download-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
      margin-bottom: 80px;
    }

    .download-card {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: 20px;
      padding: 40px;
      text-align: center;
      transition: all 0.3s;
    }

    .download-card:hover {
      border-color: var(--primary-blue);
      transform: translateY(-5px);
      box-shadow: 0 15px 30px rgba(29, 123, 255, 0.1);
    }

    .platform-icon {
      font-size: 48px;
      margin-bottom: 25px;
    }

    .download-card h3 {
      font-size: 22px;
      margin-bottom: 10px;
    }

    .download-card .version {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 25px;
    }

    .qr-placeholder {
      width: 140px;
      height: 140px;
      background: #1e293b;
      margin: 0 auto 25px;
      border-radius: 12px;
      border: 1px solid var(--border-light);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 11px;
      color: var(--text-muted);
    }

    
    .steps-section {
      padding: 80px 0;
      border-top: 1px solid var(--border-light);
    }

    .steps-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }

    .step-card {
      background: rgba(15, 22, 42, 0.3);
      border: 1px solid var(--border-light);
      border-radius: 16px;
      padding: 30px;
      position: relative;
    }

    .step-num {
      position: absolute;
      top: 20px;
      right: 20px;
      font-size: 32px;
      font-weight: 800;
      color: rgba(29, 123, 255, 0.15);
    }

    .step-card h3 {
      font-size: 18px;
      margin-bottom: 12px;
    }

    .step-card p {
      color: var(--text-muted);
      font-size: 14px;
    }

    
    .site-footer { background: #04060c; border-top: 1px solid var(--border-light); padding: 80px 0 30px; }
    .footer-inner { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 40px; margin-bottom: 50px; }
    .footer-brand .logo { margin-bottom: 20px; }
    .brand-desc { color: var(--text-muted); font-size: 14px; line-height: 1.6; }
    .footer-links-group h4, .footer-contact h4 { font-size: 16px; font-weight: 600; margin-bottom: 20px; color: var(--text-white); }
    .footer-links-group ul { list-style: none; }
    .footer-links-group ul li { margin-bottom: 12px; }
    .footer-links-group ul li a { color: var(--text-muted); font-size: 14px; }
    .footer-links-group ul li a:hover { color: var(--primary-blue); }
    .footer-contact p { color: var(--text-muted); font-size: 14px; margin-bottom: 12px; }
    .social-links { display: flex; gap: 15px; margin-top: 20px; }
    .social-icon { width: 36px; height: 36px; background: rgba(255,255,255,0.03); border: 1px solid var(--border-light); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 16px; }
    .social-icon:hover { border-color: var(--primary-blue); color: var(--primary-blue); }
    .footer-bottom { border-top: 1px solid rgba(255, 255, 255, 0.05); padding-top: 30px; text-align: center; color: var(--text-muted); font-size: 13px; }

    @media (max-width: 1024px) {
      .download-grid { grid-template-columns: 1fr; }
      .steps-grid { grid-template-columns: 1fr; }
      .footer-inner { grid-template-columns: repeat(2, 1fr); }
    }

    @media (max-width: 768px) {
      .nav-desktop, .header-actions .btn { display: none; }
      .drawer-trigger { display: flex; }
      .footer-inner { grid-template-columns: 1fr; }
    }