body {
      margin: 0;
      font-family: Arial, sans-serif;
      background: radial-gradient(circle at top, #031b14 0%, #020c08 60%, #010504 100%);
      color: #eefdf6;
  }

  .tutorial-header {
      position: sticky;
      top: 0;
      z-index: 20;
      background: rgba(0, 26, 18, 0.9);
      border-bottom: 1px solid rgba(34, 211, 238, 0.2);
      backdrop-filter: blur(12px);
  }

  .tutorial-nav {
      max-width: 1180px;
      margin: 0 auto;
      padding: 18px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
  }

  .tutorial-brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
      color: #22d3ee;
      font-weight: 700;
      letter-spacing: 0.6px;
  }

  .tutorial-brand span {
      font-size: 20px;
  }

  .tutorial-links {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-wrap: wrap;
  }

  .tutorial-link {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 8px 18px;
      border-radius: 999px;
      border: 1px solid rgba(167, 243, 208, 0.25);
      color: #a7f3d0;
      text-decoration: none;
      font-weight: 600;
      font-size: 14px;
      transition: all 0.2s ease;
  }

  .tutorial-link:hover {
      border-color: rgba(167, 243, 208, 0.45);
      background: rgba(167, 243, 208, 0.12);
      transform: translateY(-2px);
  }

  .tutorial-main {
      display: grid;
      grid-template-columns: 280px 1fr;
      gap: 32px;
      max-width: 1180px;
      margin: 0 auto;
      padding: 48px 24px 80px 24px;
  }

  .tutorial-sidebar {
      position: sticky;
      top: 110px;
      align-self: start;
      background: rgba(3, 33, 23, 0.9);
      border: 1px solid rgba(34, 211, 238, 0.18);
      border-radius: 20px;
      padding: 24px;
      box-shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
  }

  .sidebar-title {
      margin: 0 0 18px 0;
      font-size: 16px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: #67e8f9;
  }

  .sidebar-links {
      display: flex;
      flex-direction: column;
      gap: 12px;
      list-style: none;
      padding: 0;
      margin: 0;
  }

  .sidebar-links a {
      color: rgba(224, 242, 241, 0.88);
      text-decoration: none;
      font-weight: 600;
      font-size: 14px;
      display: inline-flex;
      align-items: center;
      gap: 10px;
      transition: color 0.2s ease, transform 0.2s ease;
  }

  .sidebar-links a::before {
      content: '⬤';
      font-size: 8px;
      color: rgba(34, 211, 238, 0.6);
  }

  .sidebar-links a:hover {
      color: #22d3ee;
      transform: translateX(3px);
  }

  .tutorial-content {
      background: rgba(2, 24, 17, 0.85);
      border: 1px solid rgba(34, 211, 238, 0.18);
      border-radius: 28px;
      padding: 42px;
      box-shadow: 0 30px 70px rgba(0, 0, 0, 0.45);
      display: flex;
      flex-direction: column;
      gap: 42px;
  }

  .content-header {
      display: flex;
      flex-direction: column;
      gap: 18px;
  }

  .content-header h1 {
      margin: 0;
      font-size: 40px;
      color: #ecfeff;
  }

  .content-header p {
      margin: 0;
      font-size: 17px;
      line-height: 1.7;
      color: rgba(224, 242, 241, 0.88);
  }

  .badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(34, 211, 238, 0.15);
      color: #67e8f9;
      border-radius: 999px;
      padding: 6px 14px;
      font-weight: 600;
      font-size: 13px;
      letter-spacing: 0.4px;
      width: fit-content;
  }

  section h2 {
      margin: 0 0 16px 0;
      font-size: 28px;
      color: #f0fdf4;
  }

  section p {
      margin: 0 0 12px 0;
      font-size: 16px;
      line-height: 1.75;
      color: rgba(224, 242, 241, 0.84);
  }

  .step-list,
  .tip-list {
      margin: 18px 0 0 0;
      padding-left: 22px;
      display: grid;
      gap: 10px;
  }

  .step-list li,
  .tip-list li {
      color: rgba(224, 242, 241, 0.88);
      line-height: 1.65;
  }

  .highlight-box {
      background: rgba(13, 55, 41, 0.8);
      border: 1px solid rgba(34, 211, 238, 0.22);
      border-radius: 18px;
      padding: 20px 24px;
      margin-top: 20px;
      display: grid;
      gap: 12px;
  }

  .highlight-box strong {
      color: #5eead4;
  }

  .cta-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 24px;
  }

  .cta-links a {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 10px 18px;
      border-radius: 999px;
      background: rgba(34, 211, 238, 0.18);
      color: #ecfeff;
      text-decoration: none;
      font-weight: 600;
      font-size: 14px;
      transition: transform 0.2s ease, box-shadow 0.2s ease;
  }

  .cta-links a:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 28px rgba(34, 211, 238, 0.25);
  }

  footer {
      text-align: center;
      padding: 32px 12px 48px 12px;
      font-size: 14px;
      color: rgba(224, 242, 241, 0.6);
  }

  @media (max-width: 1024px) {
      .tutorial-main {
          grid-template-columns: 1fr;
      }

      .tutorial-sidebar {
          position: static;
          order: -1;
      }
  }

  @media (max-width: 640px) {
      .tutorial-nav {
          flex-direction: column;
          align-items: flex-start;
      }

      .tutorial-content {
          padding: 28px;
      }

      .content-header h1 {
          font-size: 32px;
      }

      section h2 {
          font-size: 24px;
      }
  }