.button {
  outline: 0;
  border: 0;
  padding: .5em 1em;
  border-radius: .1em;
  cursor: pointer;
  background: var(--blue);
  color: white;
  border: 1px solid rgba(0, 0, 0, 0.05);
  box-shadow: 0 0 5px rgba(0, 0, 0, 0.05);
  transition: .1s ease all;
}

.button:hover {
  background-color: var(--dark-blue);
}

.button--block {
  margin: 0 0 0.5em;
  display: block;
  width: 100%;
}

.button--red {
  background: var(--red);
}

.button--blue {
  background: var(--blue);
}

.button--flat {
  color: var(--dark-blue);
  background: transparent;
  box-shadow: 0 0 0;
  border: 0;
  text-transform: uppercase;
}

.button--flat:hover {
  background: var(--moon-grey);
}

.button--flat.button--red {
  color: var(--dark-red);
}

.button--flat.button--grey {
  color: #6f6f6f;
}

.button[disabled] {
  opacity: .5;
  cursor: not-allowed;
}