/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 2.75rem;
  padding: var(--space-2-5) var(--space-6);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  letter-spacing: 0.01em;
  text-transform: none;
  line-height: var(--leading-none);
  text-decoration: none;
  border-radius: var(--radius-full);
  border: var(--border-width) solid transparent;
  transition:
    background var(--duration-normal) var(--ease-default),
    color var(--duration-normal) var(--ease-default),
    border-color var(--duration-normal) var(--ease-default),
    filter var(--duration-normal) var(--ease-default),
    transform var(--duration-normal) var(--ease-out);
}

.btn--primary {
  color: var(--color-on-green);
  background: var(--plein-primary);
  border-color: var(--plein-primary);
  box-shadow: none;
}

@media (hover: hover) and (pointer: fine) {
  .btn--primary:hover {
    color: var(--color-on-green);
    background: var(--plein-primary-dark);
    border-color: var(--plein-primary-dark);
    filter: brightness(1.05);
    transform: translateY(-1px);
  }
}

.btn--primary:active {
  color: var(--color-on-green);
  background: var(--brand-green);
  border-color: var(--brand-green);
  filter: none;
  transform: none;
}

@media (hover: none), (pointer: coarse) {
  .btn,
  .btn:hover,
  .btn:active {
    transform: none;
    filter: none;
  }
}