button.css

/* Buttons */
/* Base */
.button,
button,
input[type="submit"],
input[type="reset"],
input[type="button"] {
  display: inline-block;
  padding: 0.5rem 0.75rem;
  cursor: pointer;
  font-weight: 500;
  font-size: 1rem;
  line-height: 1.15;
  letter-spacing: 0.025rem;
  border: none;
  border-radius: 0.25rem;
  border: 1px solid #aaa;
  background-color: transparent;
  color: #444;
  outline: none;
  text-decoration: none;
  user-select: none;
  width: auto;
  height: auto;
  margin: 0 0.5rem 0.75rem 0;
}
button:hover,
.button:hover,
input[type="submit"]:hover,
input[type="reset"]:hover,
input[type="button"]:hover,
button:focus,
.button:focus,
input[type="submit"]:focus,
input[type="reset"]:focus,
input[type="button"]:focus {
  text-decoration: none;
  border-color: #555;
  color: #000;
}
/* Extras */
.primary {
  color: #fff;
  border-color: #146eeb;
  background-color: #146eeb;
}
.primary:hover,
.primary:focus {
  color: #fff;
  border-color: #125ece;
  background-color: #125ece;
}
.secondary {
  border-color: #ebebeb;
  background-color: #ebebeb;
}
.secondary:hover,
.secondary:focus {
  border-color: #e0e0e0;
  background-color: #e0e0e0;
}
.round {
  border-radius: 1.25rem;
  padding: 0.5rem 1rem;
}
/* w/ an icon */
.icon-button {
  padding: 0.5rem 1rem 0.5rem 0.75rem;
  display: flex;
}
.icon-button .icon {
  width: 1.25rem;
  height: 1.25rem;
  margin-right: 0.25rem;
}