body {
            font-family: Arial, sans-serif;
            background-color: #f4f4f4;
            color: #333;
            padding: 20px;
            margin: 0;
        }
        h1 {
            color: #FF4500;
            background-color: gold;
            text-align: center;
            border-bottom: 2px solid #FFA500;
            padding-bottom: 10px;
        }
        p {
            text-align: center;
            color: #555;
        }
        a {
            color: #1E90FF;
            text-decoration: none;
        }
        a:hover {
            text-decoration: underline;
        }
        .controls {
            display: flex;
            gap: 10px;
            margin-bottom: 15px;
            align-items: center;
        }
        #search-input {
            flex-grow: 1;
            padding: 10px;
            border: 1px solid #ccc;
            border-radius: 5px;
            font-size: 1em;
        }
        #search-button {
            padding: 10px 15px;
            font-size: 1em;
            color: white;
            background-color: #4CAF50;
            border: none;
            border-radius: 5px;
            cursor: pointer;
        }
        #search-button:hover {
            background-color: #45a049;
        }
        .section-button {
            display: block;
            width: 100%;
            padding: 15px;
            margin: 10px 0;
            font-size: 1.2em;
            text-align: center;
            color: white;
            background-color: #1E90FF;
            border: none;
            border-radius: 5px;
            cursor: pointer;
        }
        .section-button:hover {
            background-color: #007BFF;
        }
        .section {
            display: none;
            margin-top: 20px;
            padding: 15px;
            background-color: #fff;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
        }
        ul {
            list-style-type: none;
            padding: 0;
        }
        li {
            background-color: #ffffff;
            margin: 10px 0;
            padding: 15px;
            border-radius: 5px;
            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
            font-size: 1.1em;
            border-left: 5px solid #1E90FF;
            display: flex;
            align-items: center;
        }
        li.hidden {
            display: none !important;
        }
        .number {
            font-weight: bold;
            color: #FF4500;
            margin-right: 10px;
            flex-shrink: 0;
        }
        .item-content {
            flex-grow: 1;
        }

        .video-link, .pdf-link, .other-link {
            text-decoration: none;
            cursor: pointer;
            position: relative;
            padding-left: 25px;
            display: inline-block;
            font-family: Arial, sans-serif;
            color: #333;
        }

        .video-link { color: Green; }
        .pdf-link { color: red; }
        .other-link { color: #333; }

        .video-link:hover, .pdf-link:hover, .other-link:hover {
            text-decoration: underline;
        }

        .video-link::before {
            content: "\f144";
            font-family: "Font Awesome 5 Free";
            font-weight: 900;
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            font-size: 1.2em;
            color: green;
        }

         .pdf-link::before {
            content: "\f019";
            font-family: "Font Awesome 5 Free";
            font-weight: 900;
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            font-size: 1.2em;
            color: red;
        }

        /* Popup Styles */
        .popup-overlay { 
            position: fixed; 
            top: 0; 
            left: 0; 
            width: 100%; 
            height: 100%; 
            background-color: rgba(0, 0, 0, 0.7); 
            display: none; 
            justify-content: center; 
            align-items: center; 
            z-index: 2000; 
        }
        .movie-popup { 
            background-color: white; 
            padding: 30px; 
            border-radius: 15px; 
            text-align: center; 
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3); 
            display: none; 
            position: relative;
            z-index: 2001; 
            transform: scale(0.8); 
            opacity: 0; 
            transition: transform 0.3s ease-out, opacity 0.3s ease-out;
        }
        .movie-popup.show { 
            transform: scale(1); 
            opacity: 1; 
            display: flex; 
            flex-direction: column; 
            align-items: center; 
            justify-content: center;
        }
        .movie-popup img { 
            width: 80px; 
            height: 80px; 
            margin-bottom: 15px; 
            animation: bounce 1s infinite alternate;
        }
        @keyframes bounce {
            from { transform: translateY(0px); }
            to { transform: translateY(-10px); }
        }
        .movie-popup p { 
            font-size: 1.3em; 
            color: #333; 
            font-weight: bold;
        }



.topic-btn {
  display: inline-block;
  margin: 5px;
  padding: 6px 12px;
  background: #ff9800;
  color: #fff;
  border-radius: 20px;
  cursor: pointer;
  font-size: 14px;
}
.topic-btn:hover {
  background: #e68900;
}
.topic-btn.active {
  background: #2e7d32;
          }