.video-slider {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  justify-content: center;
}

.main-video iframe {
  width: 100vw;
  height: 360px;
  max-width:690px;
}

.thumbnail-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-height: 360px;
  overflow-y: auto;
  width: 300px;
}

.thumbnail {
  cursor: pointer;
  display: flex;
  gap: 10px;
  align-items: start;
  transition: background 0.2s ease;
  margin:7px 0;
}

    .thumbnail:hover {
        background: #fff;
    }

.thumbnail img {
  width: 100px;
 
}

.thumbnail-info {
  flex: 1;
  font-size: 14px;
}
.thumbnail-info h4 {
  margin: 0;
  font-size: 14px;
  font-weight: bold;
}
.thumbnail-info p {
  margin: 4px 0 0;
  font-size: 11px;
  color: #555;
}

@media screen and (max-width:1000px){
    .main-video iframe {
        width: 90vw;
        margin:0 auto;
    }
    .video-slider {
        display: grid;
    }
    .thumbnail-list {
        width: 90vw;
    }
}