html {
      scroll-behavior: smooth;
    }
    body {
      margin: 0;
      font-family: Arial, sans-serif;
      background-color: #454545;
      color: #ffffff;
    }
    header {
      padding: 20px 10px;
      text-align: center;
      background-color: #1e1e1e;
      position: sticky;
      top: 0;
      z-index: 1000;
    }
    h1 {
      font-size: 26px;
      margin: 0 0 10px 0;
    }
    #search {
      width: 90%;
      max-width: 400px;
      margin: 10px auto;
      display: block;
      padding: 10px;
      border-radius: 8px;
      border: none;
      font-size: 16px;
    }
    .nav-buttons {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 8px;
      margin-top: 10px;
    }
    .nav-buttons a {
      padding: 6px 12px;
      background-color: #03dac5;
      color: #000;
      border-radius: 6px;
      font-size: 14px;
      text-decoration: none;
      font-weight: bold;
    }
    h2.category-title {
      margin: 30px 20px 10px;
      font-size: 22px;
      color: #03dac5;
      border-bottom: 1px solid #333;
      padding-bottom: 5px;
    }
    .tools {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
      gap: 20px;
      padding: 20px;
    }
    .tool-card {
      background: #1e1e1e;
      border-radius: 12px;
      padding: 15px;
      transition: 0.2s ease-in-out;
      box-shadow: 0 4px 6px rgba(0,0,0,0.3);
    }
    .tool-card:hover {
      background-color: #2a2a2a;
    }
    .tool-title {
      font-size: 18px;
      margin: 10px 0 5px;
    }
    .tool-desc {
      font-size: 14px;
      color: #bbb;
    }
    .tool-link {
      margin-top: 10px;
      display: inline-block;
      padding: 8px 12px;
      background-color: #03dac5;
      color: #000;
      border-radius: 8px;
      text-decoration: none;
      font-weight: bold;
    }