Gym-MiniGrid/docs/_static/css/env_pages.css

.env-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    width: 100%;
    box-sizing: border-box;
}
.env-grid__cell {
    display: flex;
    flex-direction: column;
    width: 180px;
    height: 180px;
    padding: 10px;
}
.cell__image-container {
    display: flex;
    height: 148px;
    justify-content: center;
}
.cell__image-container img {
    max-height: 100%;
}
.cell__title {
    display: flex;
    justify-content: center;
    text-align: center;
    align-items: flex-end;
    height: 32px;
    line-height: 16px;
}
.more-btn {
    width: 240px;
    margin: 12px auto;
    display: block;
}