#downloadLvnk {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  width: 80px;        /* квадрат */
  height: 80px;       /* квадрат */
  border-radius: 8px;
  background: linear-gradient(145deg, #4a90e2, #357ab7);
  color: #fff !important;
  font-weight: 600;
  text-decoration: none;
  text-align: center;
  box-shadow: 0 5px 0 #2c5ca7, 0 10px 15px rgba(0,0,0,0.3);
  transition: all 0.1s ease-in-out;
  perspective: 800px;
}

#downloadLvnk:hover {
  transform: translateY(-2px);
  box-shadow: 0 7px 0 #2c5ca7, 0 12px 20px rgba(0,0,0,0.35);
}

#downloadLvnk:active {
  transform: translateY(2px);
  box-shadow: 0 3px 0 #2c5ca7, 0 8px 12px rgba(0,0,0,0.2);
}

#downloadLvnk:focus {
  outline: 2px solid #fff;
  outline-offset: 2px;
}

#downloadLvnk:visited {
  color: #eee !important;
}