/* ==========================================================================
   Buttons — one system, three variants.
   Per the design system, the magnetic hover is reserved for exactly two
   buttons site-wide (hero CTA + contact submit) — do not apply .btn-magnetic
   anywhere else.
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  font-family: var(--font-sans);
  font-size: var(--text-nav);
  font-weight: 500;
  letter-spacing: var(--tracking-nav);
  text-transform: uppercase;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  transition:
    transform var(--duration-micro) var(--ease-response),
    box-shadow var(--duration-micro) var(--ease-response),
    background-color var(--duration-micro) var(--ease-response),
    color var(--duration-micro) var(--ease-response),
    border-color var(--duration-micro) var(--ease-response);
}

.btn-primary {
  background-color: var(--color-brass);
  color: var(--color-ink);
  border: 1px solid var(--color-brass);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(176, 141, 76, 0.25);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-white);
  /* A graphite-line border reads fine on a solid ink surface but nearly
     disappears against a photo — this variant needs to work on both. */
  border: 1px solid rgba(255, 255, 255, 0.55);
  text-shadow: 0 1px 10px rgba(14, 15, 18, 0.5);
}
.btn-secondary:hover {
  background-color: var(--color-white);
  color: var(--color-ink);
  border-color: var(--color-white);
  text-shadow: none;
}

.btn-ghost {
  padding: 0;
  border-radius: 0;
  position: relative;
}
.btn-ghost::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-micro) var(--ease-response);
}
.btn-ghost:hover::after {
  transform: scaleX(1);
}

/* Magnetic hook — JS (main.js) applies a mousemove transform to [data-magnetic] */
.btn-magnetic {
  transition: transform var(--duration-micro) var(--ease-response);
}

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