/*
 * Shared button behaviour. Each variant only sets --btn-bg, --btn-color and --btn-border;
 * the hover color is derived from them so every button reacts the same way.
 */
.btn {
  --btn-bg: transparent;
  --btn-color: currentColor;
  --btn-border: transparent;
  --btn-hover-mix: var(--color-white);

  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding: 0.55em 1.6em;
  border: 2px solid var(--btn-border);
  border-radius: var(--radius-pill);
  background-color: var(--btn-bg);
  color: var(--btn-color);
  font-family: var(--font-sans);
  font-weight: 600;
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition:
    background-color var(--duration-base) var(--ease-out),
    border-color var(--duration-base) var(--ease-out),
    color var(--duration-base) var(--ease-out),
    transform var(--duration-base) var(--ease-out),
    box-shadow var(--duration-base) var(--ease-out);
}

.btn:hover {
  background-color: color-mix(in srgb, var(--btn-bg), var(--btn-hover-mix) 12%);
  border-color: color-mix(in srgb, var(--btn-border), var(--btn-hover-mix) 12%);
  transform: translateY(-2px);
  box-shadow: 0 8px 18px rgb(45 22 6 / 18%);
}

.btn:active {
  transform: translateY(0);
  box-shadow: 0 3px 8px rgb(45 22 6 / 18%);
}

.btn:focus-visible {
  outline: 3px solid var(--btn-focus, var(--color-brown));
  outline-offset: 4px;
  border-radius: var(--radius-pill);
}

.btn--brown {
  --btn-bg: var(--color-brown);
  --btn-color: var(--color-cream);
  --btn-border: var(--color-brown);
}

@media (prefers-reduced-motion: reduce) {
  .btn:hover {
    transform: none;
  }
}