body {
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f0f2f5;
    color: #333;
    padding: 20px;
  }
  
  h1 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 30px;
  }
  
  .filter-buttons {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 25px;
  }
  
  .filter-buttons button {
    background-color: #3498db;
    color: white;
    border: none;
    padding: 10px 18px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.95rem;
  }
  
  .filter-buttons button:hover {
    background-color: #2980b9;
  }
  
  #video-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 20px;
  }
  
  .video-entry {
    background-color: #fff;
    padding: 15px;
    border-radius: 12px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.08);
    transition: transform 0.2s ease;
  }
  
  .video-entry:hover {
    transform: translateY(-5px);
  }
  
  .video-entry iframe {
    width: 100%;
    height: 200px;
    border-radius: 10px;
    margin-bottom: 10px;
  }
  
  .video-entry label {
    display: flex;
    align-items: center;
    font-size: 0.95rem;
  }
  
  .video-entry input[type="checkbox"] {
    margin-right: 8px;
    transform: scale(1.2);
  }