:root {
      --primary-color: #1D7BFF;
      --accent-color: #38BDF8;
      --bg-dark: #0F172A;
      --bg-light: #F8FAFC;
      --text-main: #1E293B;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
      --glass-border: rgba(255, 255, 255, 0.1);
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: -apple-system, sans-serif;
      color: var(--text-main);
      background-color: var(--bg-light);
      line-height: 1.6;
    }
    a { color: inherit; text-decoration: none; transition: all 0.3s; }
    .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
    
    
    .header {
      position: sticky;
      top: 0;
      width: 100%;
      z-index: 100;
      padding: 15px 0;
      border-bottom: 1px solid var(--border-color);
      background: #ffffff;
    }
    .header-wrapper { display: flex; align-items: center; justify-content: space-between; }
    .logo { display: inline-flex; align-items: center; gap: 12px; }
    .logo img { height: 40px; max-width: 160px; object-fit: contain; }
    .logo span { font-size: 20px; font-weight: 800; color: var(--bg-dark); }
    .nav-menu { display: flex; align-items: center; gap: 32px; }
    .nav-menu a { color: var(--text-main); font-weight: 500; font-size: 15px; }
    .nav-menu a:hover { color: var(--primary-color); }
    .menu-toggle { display: none; background: none; border: none; font-size: 24px; cursor: pointer; color: var(--bg-dark); }

    
    .drawer { position: fixed; top: 0; left: -280px; width: 280px; height: 100%; background: var(--bg-dark); z-index: 1000; transition: left 0.3s ease; padding: 30px 24px; display: flex; flex-direction: column; gap: 30px; }
    .drawer.open { left: 0; }
    .drawer-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.6); z-index: 999; display: none; }
    .drawer-overlay.show { display: block; }
    .drawer-header { display: flex; align-items: center; justify-content: space-between; }
    .drawer-header .logo span { color: #fff; }
    .drawer-close { background: none; border: none; color: #fff; font-size: 28px; }

    
    .banner-sub {
      background: radial-gradient(circle at 50% 30%, #1e293b 0%, var(--bg-dark) 100%);
      color: #fff;
      padding: 60px 0;
      text-align: center;
    }
    .banner-title { font-size: 32px; font-weight: 800; margin-bottom: 10px; }

    
    .download-section { padding: 80px 0; background-color: #fff; }
    .download-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; }
    .download-content h2 { font-size: 28px; font-weight: 800; margin-bottom: 20px; }
    .download-content p { color: var(--text-muted); font-size: 16px; margin-bottom: 30px; }
    .download-buttons { display: flex; flex-direction: column; gap: 15px; }
    .dl-btn { display: flex; align-items: center; gap: 15px; padding: 16px 28px; background: var(--bg-dark); color: #fff; border-radius: 12px; font-weight: 700; transition: all 0.3s ease; }
    .dl-btn:hover { background: var(--primary-color); transform: translateY(-3px); }
    .dl-icon { font-size: 28px; }

    .download-img-placeholder { background: linear-gradient(135deg, rgba(29, 123, 255, 0.1), rgba(56, 189, 248, 0.2)); border-radius: 16px; padding: 40px; text-align: center; border: 1px solid var(--border-color); }
    .download-img-placeholder h3 { font-size: 22px; margin-bottom: 15px; }

    
    .footer { background-color: var(--bg-dark); color: #94a3b8; padding: 80px 0 30px 0; border-top: 1px solid var(--glass-border); font-size: 14px; }
    .footer-grid { display: grid; grid-template-columns: 2fr repeat(3, 1fr); gap: 50px; margin-bottom: 60px; }
    .footer-brand p { margin-top: 20px; line-height: 1.8; }
    .footer-title { color: #fff; font-size: 16px; font-weight: 700; margin-bottom: 24px; }
    .footer-links { list-style: none; }
    .footer-links li { margin-bottom: 12px; }
    .footer-links a:hover { color: #fff; }
    .footer-bottom { border-top: 1px solid rgba(255, 255, 255, 0.05); padding-top: 30px; display: flex; justify-content: space-between; align-items: center; }

    @media (max-width: 991px) {
      .download-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 768px) {
      .nav-menu { display: none; }
      .menu-toggle { display: block; }
      .footer-grid { grid-template-columns: 1fr; gap: 30px; }
      .footer-bottom { flex-direction: column; gap: 15px; text-align: center; }
    }