body {
      font-family: "Segoe UI", Arial, sans-serif;
      margin: 0;
      background-color: #f7f9fc;
      color: #333;
      line-height: 1.8;
    }

    nav {
      background-color: #1e293b;
      padding: 10px 0;
    }

    nav ul {
      list-style: none;
      display: flex;
      justify-content: center;
      margin: 0;
      padding: 0;
    }

    nav ul li {
      position: relative;
      margin: 0 20px;
    }

    nav a {
      text-decoration: none;
      color: #fff;
      font-weight: 600;
      padding: 8px 14px;
      display: block;
      transition: background 0.3s ease;
    }

    nav a:hover {
      background: #334155;
      border-radius: 5px;
    }

    .dropdown-menu {
      display: none;
      position: absolute;
      background: #fff;
      min-width: 220px;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
      border-radius: 6px;
      top: 38px;
      z-index: 1000;
    }

    .dropdown-menu a {
      color: #333;
      padding: 10px 15px;
      font-weight: normal;
    }

    .dropdown-menu a:hover {
      background-color: #f1f5f9;
    }

    .dropdown:hover .dropdown-menu {
      display: block;
    }

    header {
      display: flex;
      align-items: center;
      justify-content: flex-start;
      background-color: #fff;
      border-bottom: 2px solid #e5e7eb;
      padding: 20px 40px;
    }

    header img {
      width: 90px;
      height: auto;
      margin-right: 20px;
      border-radius: 8px;
    }

    header h1 {
      color: #1e293b;
      font-size: 24px;
      margin: 0;
    }

    main {
      max-width: 900px;
      margin: 40px auto;
      padding: 0 20px;
      background-color: #fff;
      border-radius: 10px;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    }

    main h2 {
      color: #1e293b;
      font-size: 22px;
      margin-top: 30px;
      margin-bottom: 10px;
    }

    main p {
      color: #475569;
      font-size: 16px;
      margin-bottom: 15px;
    }

    .video-container {
      text-align: center;
      margin: 25px 0;
    }

    video {
      width: 100%;
      max-width: 700px;
      border-radius: 10px;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    }

    footer {
      text-align: center;
      padding: 20px;
      background: #1e293b;
      color: #fff;
      font-size: 14px;
      margin-top: 40px;
    }