.video-container {
            position: relative;
            width: 387px;
            height: 218px;
            margin: 0 auto;
            background-color: #000;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            background: transparent;
        }
        
        .thumbnail {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
/*            height: 100%;*/
            cursor: pointer;
            transition: opacity 0.3s ease;
            background: transparent;
            border: none;
        }
        
        .thumbnail img {
            width: 100%;
/*            height: 100%;*/
            object-fit: cover;
        }
        
        .play-button {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 70px;
            height: 50px;
            background-color: rgba(255, 0, 0, 0.8);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s ease;
        }
        
        .thumbnail:hover .play-button {
            background-color: rgba(255, 0, 0, 1);
            transform: translate(-50%, -50%) scale(1.1);
        }
        
        .play-button::after {
            content: '';
            width: 0;
            height: 0;
            border-left: 25px solid white;
            border-top: 15px solid transparent;
            border-bottom: 15px solid transparent;
            margin-left: 5px;
        }
        
        .video-frame {
          position: absolute;
          top: 0;
          left: 0;
            width: 100%;
            max-width: 387px;
            height: 100%;
            border: none;
            display: none;
        }
        
        .sign-in-video-frame {
          position: absolute;
          top: 0;
          left: 0;
            width: 100%;
            max-width: 803px;
            height: 100%;
            border: none;
            display: none;
        }

        .selecting-video-frame, 
        .problem-solving-video-frame {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            max-width: 446px;
            height: 100%;
            border: none;
            display: none;
        }

        .video-frame.active {
            display: block;
        }

        .sign-in-video-frame.active, 
        .selecting-video-frame.active, 
        .problem-solving-video-frame.active {
            display: block;
        }

      .divider {
        border-left: solid 2px #E3E4E5;
        height: 100%;
        background: transparent;
        padding-left: 35px;
        }

        @media (max-width: 767px) {
          .divider {
           border-left: none !important;
           padding-left: 15px;
          }
      }


      .col-head {
        color: #242424;
        font-family: Poppins;
        font-size: 24px;
        font-style: normal;
        font-weight: 500;
        line-height: normal;
      }

      .button.thumbnail {
        padding: 0px;
      }

      .sign-in-video-container {
          position: relative;
          max-width: 803px;
          height: 452px !important;
        }

    @media (max-width: 768px) {
          .sign-in-video-container {
            height: 206px;
          }
        }

.selecting-video-container, .problem-solving-video-container {
  position: relative;
  max-width: 446px;
  height: 203px !important;
}

    @media (max-width: 768px) {
          .selecting-video-container, .problem-solving-video-container {
            position: relative;
            height: 175px !important;
          }
        }