body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background-color: #f4f4f4;
}

article h1{
   padding-top: 30px;
  margin-bottom: 20px;
  font-size: 30px;
  text-align: center;
}
.videos-container {
  display: flex;
  flex-direction: row;
  min-height: 100vh;
  overflow: hidden;
}

.video-list {
  width: 25%;
  background-color: #fff;
  border-right: 1px solid #ddd;
  overflow-y: auto;
  max-height: 100vh;
}

.video-list ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.video-list li {
  padding: 20px;
  border-bottom: 1px solid #eee;
  cursor: pointer;
  transition: background 0.3s;
}

.video-list li:hover,
.video-list li.active {
  background-color: #f0f0f0;
}

.video-player {
  flex: 1;
  padding: 20px;
  display: flex;
  justify-content: center;
  align-items: center;
  background: hsl(0,0%,90%);
}

.video-player iframe {
  width: 100%;
  height: 70vh;
  max-width: 960px;
  border-radius: 10px;
}

/* Responsive Styles */
@media (max-width: 768px) {
  .videos-container {
    flex-direction: column;
  }

  .video-list {
    width: 100%;
    max-height: 200px;
    border-right: none;
    border-bottom: 1px solid #ddd;
  }

  .video-player {
    padding: 10px;
  }

  .video-player iframe {
    height: 50vh;
  width: 70%;
  }
}
@media(min-width: 1000px){
  article h1{
    font-size: 40px;
  }
}