:root {
      --primary-color: #1D7BFF;
      --bg-dark: #0B192C;
      --bg-deep: #030811;
      --bg-light: #F8FAFC;
      --text-dark: #0F172A;
      --text-light: #F8FAFC;
      --text-muted: #94A3B8;
      --ice-blue: #E0F2FE;
      --silver-white: #E2E8F0;
      --theme-accent: rgb(241,250,140);
      --border-color: rgba(255, 255, 255, 0.1);
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif; background-color: var(--bg-light); color: var(--text-dark); line-height: 1.6; }
    a { color: inherit; text-decoration: none; transition: var(--transition); }

    
    header { background-color: var(--bg-dark); border-bottom: 1px solid var(--border-color); position: sticky; top: 0; z-index: 100; }
    .header-container { max-width: 1200px; margin: 0 auto; padding: 16px 20px; display: flex; align-items: center; justify-content: space-between; }
    .logo { display: inline-flex; align-items: center; gap: 12px; }
    .logo img { display: block; height: 40px; width: auto; max-width: 160px; object-fit: contain; }
    .logo span { font-size: 20px; font-weight: 800; color: var(--text-light); white-space: nowrap; }
    .desktop-nav { display: flex; align-items: center; gap: 24px; }
    .desktop-nav a { color: var(--text-muted); font-weight: 500; font-size: 15px; }
    .desktop-nav a:hover { color: var(--theme-accent); }
    .nav-btn { background-color: var(--primary-color); color: var(--text-light); padding: 10px 20px; border-radius: 8px; font-weight: 600; }
    .nav-btn:hover { background-color: transparent; border: 1px solid var(--theme-accent); color: var(--theme-accent); }
    .mobile-menu-toggle { display: none; background: none; border: none; color: var(--text-light); font-size: 24px; cursor: pointer; }

    
    .drawer-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0, 0, 0, 0.6); backdrop-filter: blur(4px); z-index: 998; opacity: 0; visibility: hidden; transition: var(--transition); }
    .drawer-overlay.active { opacity: 1; visibility: visible; }
    .mobile-drawer { position: fixed; top: 0; left: -280px; width: 280px; height: 100%; background-color: var(--bg-dark); z-index: 999; padding: 30px 20px; display: flex; flex-direction: column; gap: 30px; transition: var(--transition); }
    .mobile-drawer.active { left: 0; }
    .drawer-header { display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--border-color); padding-bottom: 20px; }
    .drawer-close { background: none; border: none; color: var(--text-light); font-size: 24px; cursor: pointer; }
    .drawer-nav { display: flex; flex-direction: column; gap: 16px; }
    .drawer-nav a { color: var(--text-muted); font-size: 16px; font-weight: 500; padding: 10px 0; border-bottom: 1px solid rgba(255, 255, 255, 0.05); }
    .drawer-nav a:hover { color: var(--theme-accent); }

    
    .download-header {
      background: radial-gradient(circle at top, #1e293b 0%, var(--bg-dark) 100%);
      color: var(--text-light);
      padding: 80px 20px;
      text-align: center;
    }
    .download-header h1 { font-size: 40px; font-weight: 800; margin-bottom: 16px; color: var(--theme-accent); }
    .download-header p { font-size: 18px; color: var(--text-muted); max-width: 700px; margin: 0 auto; }

    
    .download-container { max-width: 1000px; margin: 0 auto; padding: 60px 20px; }
    .download-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 40px; margin-bottom: 60px; }
    .download-card { background: #ffffff; border: 1px solid #E2E8F0; border-radius: 16px; padding: 40px; text-align: center; transition: var(--transition); }
    .download-card:hover { transform: translateY(-5px); box-shadow: 0 15px 30px rgba(0,0,0,0.05); border-color: var(--primary-color); }
    .download-icon { font-size: 48px; margin-bottom: 20px; color: var(--primary-color); }
    .download-card h3 { font-size: 24px; font-weight: 800; margin-bottom: 12px; }
    .download-card p { font-size: 14px; color: #64748B; margin-bottom: 30px; }
    .qr-placeholder { width: 150px; height: 150px; background: #f1f5f9; border: 1px solid #e2e8f0; margin: 0 auto 30px; display: flex; align-items: center; justify-content: center; font-size: 12px; color: #94a3b8; border-radius: 8px; }
    
    
    .steps-section { background: #ffffff; border: 1px solid #E2E8F0; border-radius: 16px; padding: 40px; margin-bottom: 60px; }
    .steps-title { font-size: 24px; font-weight: 800; margin-bottom: 30px; text-align: center; }
    .step-list { display: flex; flex-direction: column; gap: 24px; }
    .step-item { display: flex; gap: 20px; }
    .step-num { width: 36px; height: 36px; border-radius: 50%; background: var(--primary-color); color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 800; flex-shrink: 0; }
    .step-text h4 { font-size: 18px; font-weight: 700; margin-bottom: 6px; }
    .step-text p { font-size: 14px; color: #64748B; }

    
    footer { background-color: var(--bg-deep); color: var(--text-muted); border-top: 1px solid var(--border-color); padding: 60px 20px 30px; }
    .footer-container { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 40px; margin-bottom: 40px; }
    .footer-brand p { margin-top: 16px; font-size: 14px; }
    .footer-col h4 { color: var(--text-light); font-size: 16px; font-weight: 700; margin-bottom: 20px; }
    .footer-col ul { list-style: none; }
    .footer-col ul li { margin-bottom: 12px; }
    .footer-col ul li a { font-size: 14px; }
    .footer-col ul li a:hover { color: var(--theme-accent); }
    .footer-bottom { max-width: 1200px; margin: 0 auto; border-top: 1px solid var(--border-color); padding-top: 24px; display: flex; justify-content: space-between; align-items: center; font-size: 12px; }

    @media (max-width: 768px) {
      .download-grid { grid-template-columns: 1fr; }
      .desktop-nav { display: none; }
      .mobile-menu-toggle { display: block; }
      .footer-container { grid-template-columns: 1fr; }
      .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
    }