input.btn-bw,
input[type="submit"].btn-bw {
  background-color: #000000;
  color: #ffffff;
}

.catbtn {
  display: inline-block;
  margin: 4px 6px;
  padding: 6px 10px;
  border: 1px solid #bcd;
  border-radius: 8px;
  text-decoration: none;
  background: #eaf4ff;
  color: #123;
  box-shadow: 0 1px 2px rgba(0,0,0,0.08);
  transition: background-color 0.2s, transform 0.05s;
}
.catbtn:hover {
  background: #dceeff;
}
.catbtn:active {
  transform: translateY(1px);
}