#expand {
  width: 70px;
  height: 70px;
  margin-left: -35px;
  margin-top: -70px;
  background-color: #fff;
  color: #000;
  border-radius: 50%;
  text-align: center;
  cursor: pointer;
  transition: width .3s ease-in-out,
              height .3s ease-in-out,
              background-color .3s ease-in-out,
              color .3s ease-in-out,
              margin .3s ease-in-out;
}

#expand::after {
  content: '';
  position: absolute;
  width: 0;
  height: 0;
  top: 68px;
  left: 25px;
  border: solid transparent;
  border-color: transparent;
  border-top-color: #fff;
  border-width: 10px;
  transition: border-top-color .3s ease-in-out,
              border-width .3s ease-in-out,
              left .3s ease-in-out,
              top .3s ease-in-out;
}

#expand .title {
  line-height: 66px;
}

#expand .icon,
#expand p {
  opacity: 0;
  pointer-events: none;
}

#expand .icon {
  width: 0;
  height: 0;
  margin-top: auto;
  transition: all .3s ease-in-out;
}

#expand p {
  width: 90%;
  margin: auto;
  font-style: italic;
  font-size: 12px;
  margin-top: 10px;
  transition: opacity .2s ease-in-out;
}

#expand:hover {
  width: 200px;
  height: 200px;
  margin-top: -200px;
  margin-left: -100px;
  background-color: #222;
  color: #fff;
  z-index: 2;
}

#expand:hover .icon {
  width: 50px;
  height: 50px;
  opacity: 1;
}

#expand:hover p {
  opacity: 1;
  transition: opacity .3s ease-in-out .3s;
}

#expand:hover::after {
  border-top-color: transparent;
  border-width: 0;
  left: 95px;
  top: 198px;
}