output_template/page.css

body {
    display: flex;
    justify-content: center;
    background-image: url('assets/bg.jpg');
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-size: 100% 100%;
}

.button{
    display: flex;
    justify-content: center;
}

.button button{
    background-color: rgba(0, 0, 0, 0.42);
}

.button button:hover {
    box-shadow: 0 0 5px #fff, 0 0 10px #fff, 0 0 15px #fff, 0 0 1px #000000,
      0 0 2px #000000, 0 0 3px #000000, 0 0 3px #000000;
  }

.wrapper {
    display: flex;
    height: 400px;
    width: 600px;
    background-color: rgb(255, 255, 255);
}

.grid-container {
    width: 100%;
    height: 100%;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: repeat(2, 1fr);
    border: 0;
    row-gap: 0;
    column-gap: 0;
}

.grid-item {
    background-position: center center;
    background-repeat: no-repeat;
    background-size: contain;
    background-color: #000;
    border: 0;
    position: relative;
}

/* Image and overlay layers */
.grid-item .panel-img{
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    background: #000;
}

.grid-item .bubble-layer{
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none; /* bubbles themselves will re-enable */
}

.grid-item .bubble-layer .bubble{
    position: absolute;
    pointer-events: auto;
}

/* Make navigation buttons small */
.button button {
    padding: 4px;
}

.button button img {
    width: 20px;
    height: 20px;
}