/* ============================================================
   BUTTONS.CSS
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  cursor: pointer;
  transition:
    transform var(--duration-fast) var(--ease-out),
    box-shadow var(--duration-fast) var(--ease-out),
    background var(--duration-fast) var(--ease-out),
    opacity var(--duration-fast) var(--ease-out);
  white-space: nowrap;
  text-decoration: none;
  border: 2px solid transparent;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn:active {
  transform: translateY(0);
  box-shadow: none;
}

.btn:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
}

.btn--primary {
  background: var(--gradient-primary);
  color: var(--color-text-inverted);
}

.btn--primary:hover {
  box-shadow: var(--shadow-lg);
}

.btn--accent {
  background: var(--gradient-accent);
  color: var(--color-text-inverted);
}

.btn--accent:hover {
  box-shadow: 0 8px 24px rgba(232,144,26,0.4);
}

.btn--outline {
  background: transparent;
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn--outline:hover {
  background: var(--color-primary);
  color: white;
}

.btn--outline-white {
  background: transparent;
  border-color: white;
  color: white;
}

.btn--outline-white:hover {
  background: white;
  color: var(--color-primary-dark);
}

.btn--ghost {
  background: transparent;
  color: var(--color-primary);
  padding-left: 0;
  padding-right: 0;
}

.btn--ghost:hover {
  transform: none;
  box-shadow: none;
  color: var(--color-accent);
}

.btn--lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
}

.btn--sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
}

.btn svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* ── Shimmer de luz en botón de acento ───────────────────────── */

.btn--accent {
  position: relative;
  overflow: hidden;
}

.btn--accent::after {
  content: '';
  position: absolute;
  top: 0;
  left: -80%;
  width: 45%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255,255,255,0.32) 50%,
    transparent 100%
  );
  animation: btn-shimmer 4s ease-in-out infinite;
  pointer-events: none;
}

@keyframes btn-shimmer {
  0%, 55%  { left: -80%; opacity: 0; }
  60%      { opacity: 1; }
  100%     { left: 130%; opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .btn--accent::after { display: none; }
}