#btn-add {
    border-radius: 50%;
    background-color: #f8f8f8;
    box-shadow: 2px 2px 8px #888888;
    z-index: 10;

    width: 4em;
    height: 4em;

    position: absolute;
    right: 3em;
    bottom: 3em;

    text-align: center;
}

#btn-add h1 {
    font-size: 3.3em;
}

#btn-add:hover {
    cursor: pointer;
}

#btn-add.active {
    background-color: #dc3545;
    color: white;
}

@media screen and (max-width:1100px) {
    #btn-add {
      /* left: 27vw; */
    }
}

@media screen and (max-width:900px) {
    #btn-add {
        right: 6vw;
      }
  }