css remove button outline

*:focus {
    outline: 0 !important;
}

button {
  outline: none;
}
.btn:focus {
  outline: thin dotted;
  outline: 5px auto -webkit-focus-ring-color;
  outline-offset: -2px;
}
.btn:focus {
  outline: none !important;
}

.btn:focus {
  box-shadow: none;
}

button:focus {outline:0;}