.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 17px;
  line-height: 1;
  padding: 14px 28px;
  border-radius: 0;
  border: 1px solid var(--ink);
  cursor: pointer;
  text-decoration: none;
  transition: opacity 160ms ease;
  min-height: 44px;
  min-width: 44px;
}
.btn:hover { opacity: 0.88; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn--primary {
  background: var(--ink);
  color: var(--bg);
  border-color: var(--ink);
}
.btn--secondary {
  background: transparent;
  color: var(--ink);
}
.btn--lg {
  font-size: 19px;
  padding: 18px 36px;
}
.btn--full-width { width: 100%; }