* {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      font-family: Arial, sans-serif;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      background: linear-gradient(135deg, #0f172a, #1e293b);
      color: #ffffff;
      min-height: 100vh;
      padding: 30px 15px;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
    }

    .hero {
      text-align: center;
      margin-bottom: 30px;
    }

    .hero h1 {
      font-size: 2.2rem;
      color: #facc15;
      margin-bottom: 10px;
    }

    .hero p {
      color: #cbd5e1;
      max-width: 800px;
      margin: 0 auto;
      line-height: 1.7;
      font-size: 1rem;
    }

    .category-buttons {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      justify-content: center;
      margin-bottom: 40px;
    }

    .category-btn {
      text-decoration: none;
      background: #facc15;
      color: #111827;
      padding: 12px 18px;
      border-radius: 999px;
      font-weight: bold;
      transition: 0.25s ease;
      box-shadow: 0 6px 16px rgba(0,0,0,0.25);
    }

    .category-btn:hover {
      transform: translateY(-2px);
      background: #fde047;
    }

    .sections {
      display: grid;
      gap: 18px;
    }

    section {
      background: rgba(255,255,255,0.08);
      border: 1px solid rgba(255,255,255,0.08);
      border-radius: 18px;
      padding: 22px;
      box-shadow: 0 10px 24px rgba(0,0,0,0.2);
    }

    section h2 {
      color: #facc15;
      margin-bottom: 8px;
      font-size: 1.4rem;
    }

    section p {
      color: #e2e8f0;
      line-height: 1.7;
      font-size: 1rem;
    }

    .back-top {
      display: inline-block;
      margin-top: 14px;
      color: #93c5fd;
      text-decoration: none;
      font-weight: bold;
    }

    .back-top:hover {
      text-decoration: underline;
    }

    @media (max-width: 768px) {
      .hero h1 {
        font-size: 1.8rem;
      }

      .category-btn {
        width: 100%;
        text-align: center;
      }

      .category-buttons {
        flex-direction: column;
      }
    }