.title {
    color: #000000;
    font-family: time;
}

#mainDiv {
  width: center;
position: static;
  border: solid #000000 2px;
    background-color: black;
    color: white;
    margin: center;
}

a img {
    transition: all 0.5s cubic-bezier(0.23, 1, 0.32, 1);
    filter: grayscale(1);
}

a img:hover {
    transform: scale(1.1);
    filter: grayscale(0);
}

a img:active {
    transform: scale(0.98);
}

b img {
  display: block;
  margin: auto;
  width: 50%;
    height: 50%;
    scale: 70%;
}