:root {
      --primary: #1D7BFF;
      --accent: rgb(234,67,53);
      --bg-dark: #0b0f19;
      --bg-dark-secondary: #111827;
      --text-white: #f9fafb;
      --text-gray: #9ca3af;
      --text-light: #d1d5db;
      --border-color: rgba(255, 255, 255, 0.08);
    }
    * { 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-light);
      line-height: 1.6;
    }
    a { color: inherit; text-decoration: none; transition: all 0.3s ease; }

    
    .site-header {
      background: rgba(11, 15, 25, 0.85);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      position: sticky;
      top: 0;
      z-index: 100;
      width: 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;
      flex-shrink: 0;
    }
    .logo span {
      display: inline-block;
      font-size: 18px;
      font-weight: 800;
      line-height: 1;
      color: var(--text-white);
      white-space: nowrap;
    }
    .desktop-nav {
      display: flex;
      gap: 24px;
    }
    .desktop-nav a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-light);
    }
    .desktop-nav a:hover { color: var(--primary); }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 20px;
      border-radius: 6px;
      font-size: 14px;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.3s ease;
      border: none;
    }
    .btn-accent {
      background-color: var(--accent);
      color: #fff;
    }
    .btn-accent:hover {
      background-color: rgba(234, 67, 53, 0.85);
      box-shadow: 0 4px 14px rgba(234, 67, 53, 0.4);
    }
    .mobile-menu-trigger {
      display: none;
      background: none;
      border: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
    }
    .mobile-menu-trigger span {
      display: block;
      width: 24px;
      height: 2px;
      background-color: var(--text-white);
    }

    
    .mobile-drawer-overlay {
      position: fixed;
      top: 0;
      left: 0;
      width: 100vw;
      height: 100vh;
      background: rgba(0,0,0,0.7);
      opacity: 0;
      visibility: hidden;
      z-index: 199;
    }
    .mobile-drawer-overlay.active { opacity: 1; visibility: visible; }
    .mobile-drawer {
      position: fixed;
      top: 0;
      left: -300px;
      width: 300px;
      height: 100vh;
      background: var(--bg-dark-secondary);
      border-right: 1px solid var(--border-color);
      z-index: 200;
      transition: left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      display: flex;
      flex-direction: column;
      padding: 24px;
    }
    .mobile-drawer.active { left: 0; }
    .drawer-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 40px;
    }
    .drawer-close {
      background: none;
      border: none;
      color: var(--text-white);
      font-size: 28px;
      cursor: pointer;
    }

    
    .download-hero {
      padding: 80px 20px;
      background: radial-gradient(circle at 50% 100%, rgba(29, 123, 255, 0.15) 0%, rgba(11, 15, 25, 1) 100%);
      border-bottom: 1px solid var(--border-color);
      text-align: center;
    }
    .download-hero h1 {
      font-size: 36px;
      font-weight: 800;
      color: var(--text-white);
      margin-bottom: 16px;
    }
    .download-hero p {
      max-width: 600px;
      margin: 0 auto;
      color: var(--text-gray);
    }
    .download-section {
      padding: 80px 20px;
    }
    .download-grid {
      max-width: 1000px;
      margin: 0 auto;
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 40px;
    }
    .download-card {
      background: var(--bg-dark-secondary);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 40px;
      text-align: center;
      transition: all 0.3s ease;
    }
    .download-card:hover {
      border-color: rgba(29, 123, 255, 0.3);
      transform: translateY(-4px);
    }
    .card-icon {
      font-size: 48px;
      margin-bottom: 24px;
    }
    .download-card h2 {
      font-size: 24px;
      color: var(--text-white);
      margin-bottom: 16px;
    }
    .download-card p {
      color: var(--text-gray);
      font-size: 14px;
      margin-bottom: 30px;
    }
    
    
    .step-section {
      padding: 80px 20px;
      background: var(--bg-dark-secondary);
      border-top: 1px solid var(--border-color);
    }
    .step-container {
      max-width: 1000px;
      margin: 0 auto;
    }
    .step-header {
      text-align: center;
      margin-bottom: 50px;
    }
    .step-header h3 {
      font-size: 28px;
      color: var(--text-white);
    }
    .step-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .step-item {
      text-align: center;
    }
    .step-num {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: rgba(29, 123, 255, 0.1);
      border: 2px solid var(--primary);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 20px;
      margin: 0 auto 20px;
    }
    .step-item h4 {
      font-size: 18px;
      color: var(--text-white);
      margin-bottom: 10px;
    }
    .step-item p {
      font-size: 14px;
      color: var(--text-gray);
    }

    @media (max-width: 768px) {
      .desktop-nav, .header-actions { display: none; }
      .mobile-menu-trigger { display: flex; }
      .download-grid, .step-grid { grid-template-columns: 1fr; }
    }