:root {
      --primary: rgb(26, 115, 232);
      --primary-hover: #155cb0;
      --primary-light: rgba(26, 115, 232, 0.1);
      --bg-dark: #070b12;
      --bg-card: #111827;
      --border-color: rgba(255, 255, 255, 0.08);
      --text-main: #f3f4f6;
      --text-muted: #9ca3af;
      --accent: #00E5FF;
    }

    * { box-sizing: border-box; margin:0; padding:0; }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-dark);
      color: var(--text-main);
      line-height: 1.6;
    }

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

    
    header {
      position: fixed; top: 0; left: 0; width: 100%; z-index: 100;
      background: rgba(7, 11, 18, 0.85); backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
    }
    .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: 36px; width: auto; max-width: 160px; object-fit: contain; }
    .logo span { font-size: 18px; font-weight: 800; color: #fff; }
    nav.nav-desktop { display: flex; align-items: center; gap: 28px; }
    nav.nav-desktop a { font-size: 15px; font-weight: 500; color: var(--text-muted); }
    nav.nav-desktop a:hover, nav.nav-desktop a.active { color: var(--accent); }
    .header-action { display: flex; align-items: center; gap: 15px; }
    .btn-action {
      background: var(--primary); color: #fff; padding: 8px 18px; border-radius: 6px;
      font-size: 14px; font-weight: 600; border: none; display: inline-flex; cursor: pointer;
    }
    .btn-action:hover { background: var(--primary-hover); }
    .menu-toggle { display: none; background: none; border: none; color: #fff; font-size: 24px; cursor: pointer; }

    
    .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:150; opacity:0; pointer-events:none; transition:opacity 0.3s; }
    .drawer { position: fixed; top:0; left:-280px; width:280px; height:100%; background:var(--bg-card); z-index:160; transition:left 0.3s; display:flex; flex-direction:column; padding:24px; }
    .drawer.active { left:0; }
    .drawer-overlay.active { opacity:1; pointer-events:auto; }
    .drawer-header { display:flex; align-items:center; justify-content:space-between; margin-bottom:30px; }
    .drawer-close { background:none; border:none; color:var(--text-muted); font-size:24px; cursor:pointer; }
    .drawer-nav { display:flex; flex-direction:column; gap:20px; }
    .drawer-nav a { font-size:16px; color:var(--text-main); padding:8px 0; border-bottom:1px solid rgba(255,255,255,0.05); }

    
    .dl-hero {
      padding: 140px 0 60px 0;
      background: radial-gradient(circle at 50% 50%, rgba(26, 115, 232, 0.15), transparent 60%);
      text-align: center;
    }
    .dl-hero h1 { font-size: 36px; font-weight: 800; color: #fff; margin-bottom: 15px; }
    .dl-hero p { font-size: 16px; color: var(--text-muted); max-width: 600px; margin: 0 auto; }

    
    .dl-section {
      max-width: 1200px;
      margin: 40px auto 80px auto;
      padding: 0 20px;
    }

    .dl-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
      margin-bottom: 60px;
    }

    .dl-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 35px 24px;
      text-align: center;
      transition: all 0.3s;
    }

    .dl-card:hover {
      border-color: rgba(26, 115, 232, 0.5);
      transform: translateY(-5px);
    }

    .dl-icon {
      font-size: 40px;
      margin-bottom: 20px;
    }

    .dl-card h3 {
      font-size: 20px;
      color: #fff;
      margin-bottom: 12px;
    }

    .dl-card p {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 25px;
      height: 44px;
      overflow: hidden;
    }

    .btn-download {
      display: inline-block;
      width: 100%;
      background: var(--primary);
      color: #fff;
      padding: 12px;
      border-radius: 8px;
      font-weight: 600;
    }

    .btn-download:hover {
      background: var(--primary-hover);
    }

    
    .steps-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 40px;
    }

    .steps-card h2 {
      font-size: 22px;
      color: #fff;
      margin-bottom: 30px;
      text-align: center;
    }

    .step-flow {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 30px;
    }

    .step-item {
      text-align: center;
      position: relative;
    }

    .step-num {
      width: 40px;
      height: 40px;
      background: rgba(26, 115, 232, 0.1);
      color: var(--accent);
      border: 1px solid rgba(26, 115, 232, 0.3);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 15px auto;
      font-weight: 700;
    }

    .step-item h4 {
      font-size: 16px;
      color: #fff;
      margin-bottom: 10px;
    }

    .step-item p {
      font-size: 13px;
      color: var(--text-muted);
    }

    
    footer {
      background: #03060a; border-top: 1px solid var(--border-color); padding: 60px 0 30px 0;
    }
    .footer-container {
      max-width: 1200px; margin: 0 auto; padding: 0 20px; display: grid; grid-template-columns: 2fr repeat(3, 1fr); gap: 40px; margin-bottom: 40px;
    }
    .footer-brand p { font-size: 14px; color: var(--text-muted); margin-top: 15px; max-width: 320px; }
    .footer-col h4 { color: #fff; font-size: 15px; 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; color: var(--text-muted); }
    .footer-col ul li a:hover { color: var(--accent); }
    .footer-bottom {
      max-width: 1200px; margin: 0 auto; padding: 30px 20px 0 20px; border-top: 1px solid var(--border-color); display: flex; flex-wrap: wrap; justify-content: space-between; gap: 20px; font-size: 13px; color: var(--text-muted);
    }

    @media (max-width: 768px) {
      nav.nav-desktop, .header-action .btn-action { display: none; }
      .menu-toggle { display: block; }
      .footer-container { grid-template-columns: 1fr; gap: 30px; }
    }