html,
      body {
        position: relative;
        height: 100%;
      }

      body {
        background: #000;
        font-family:
          Helvetica Neue,
          Helvetica,
          Arial,
          sans-serif;
        font-size: 14px;
        color: #fff;
        margin: 0;
        padding: 0;
      }

      .swiper {
        width: 100%;
        height: 100%;
        margin-left: auto;
        margin-right: auto;
      }

      .swiper-slide {
        text-align: center;
        font-size: 18px;
        background: #333;
        height: calc((100% - 30px) / 3) !important;

        /* Center slide text vertically */
        display: flex;
        justify-content: center;
        align-items: center;
      }