/* ============================================================
   Buttons — 4 variants + WhatsApp floating
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 14px 34px;
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.3px;
  border-radius: 50px;
  border: 2px solid transparent;
  cursor: pointer;
  transition:
    background-color 0.3s ease,
    color            0.3s ease,
    border-color     0.3s ease,
    box-shadow       0.35s ease,
    transform        0.2s ease;
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
  position: relative;
  overflow: hidden;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0);
}

/* ── PRIMARY: navy bg, gold text ──────────────────────────── */

.btn-primary {
  background-color: var(--color-primary-navy);
  color: var(--color-primary-gold);
  border-color: var(--color-primary-navy);
}

.btn-primary:hover {
  background-color: var(--color-navy-dark);
  border-color: var(--color-navy-dark);
  color: var(--color-primary-gold);
  box-shadow: var(--shadow-navy);
}

/* ── SECONDARY: gold bg, navy text ───────────────────────── */

.btn-secondary {
  background-color: var(--color-primary-gold);
  color: var(--color-primary-navy);
  border-color: var(--color-primary-gold);
  font-weight: 700;
}

.btn-secondary:hover {
  background-color: var(--color-gold-dark);
  border-color: var(--color-gold-dark);
  color: var(--color-primary-navy);
  box-shadow: 0 8px 24px rgba(255,195,0,0.4);
}

/* ── GHOST: navy border/text → fills navy on hover ────────── */

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

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

/* Ghost on dark background */
.btn-ghost-white {
  background-color: transparent;
  color: var(--color-white);
  border-color: rgba(255,255,255,0.6);
}

.btn-ghost-white:hover {
  background-color: rgba(255,255,255,0.1);
  border-color: var(--color-white);
  color: var(--color-white);
}

/* ── SIZES ─────────────────────────────────────────────────── */

.btn--sm {
  padding: 10px 22px;
  font-size: var(--text-sm);
}

.btn--lg {
  padding: 18px 42px;
  font-size: var(--text-lg);
}

/* ── ICON ──────────────────────────────────────────────────── */

.btn .icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  transition: transform var(--transition-base);
}

.btn:hover .icon--arrow {
  transform: translateX(4px);
}

/* ── WHATSAPP FLOATING BUTTON ──────────────────────────────── */

.btn-whatsapp {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 60px;
  height: 60px;
  border-radius: var(--radius-full);
  background-color: var(--color-whatsapp);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(37, 211, 102, 0.5);
  z-index: var(--z-whatsapp);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  animation: whatsapp-pulse 2.5s ease-in-out infinite;
}

.btn-whatsapp:hover {
  transform: scale(1.1) translateY(-2px);
  box-shadow: 0 8px 28px rgba(37, 211, 102, 0.65);
  animation-play-state: paused;
}

.btn-whatsapp svg {
  width: 28px;
  height: 28px;
  fill: currentColor;
}

@keyframes whatsapp-pulse {
  0%, 100% { box-shadow: 0 4px 20px rgba(37, 211, 102, 0.5); }
  50%       { box-shadow: 0 4px 28px rgba(37, 211, 102, 0.75), 0 0 0 8px rgba(37, 211, 102, 0.12); }
}

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

/* Mobile: smaller */
@media (max-width: 480px) {
  .btn-whatsapp {
    width: 52px;
    height: 52px;
    bottom: 20px;
    right: 20px;
  }
}