h1 {
      text-align: center;
      padding: 15px;
    }

    .swiper {
      width: 100%;
      padding: 40px 20px;
    }

    .swiper-slide {
      display: flex;
      justify-content: center;
      align-items: center;
    }

    .video-wrapper {
      position: relative;
      width: 220px;   /* portrait size */
      height: 390px;
      border-radius: 12px;
      overflow: hidden;
      box-shadow: 0 4px 10px rgba(0,0,0,0.5);
    }

    .video-wrapper iframe {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      border: none;
    }