.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.02em;
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  cursor: pointer;
  transition: background-color var(--transition-fast),
              color var(--transition-fast),
              border-color var(--transition-fast),
              transform var(--transition-fast),
              box-shadow var(--transition-fast);
  white-space: nowrap;
  text-decoration: none;
  -webkit-tap-highlight-color: transparent;
}

.btn:active {
  transform: translateY(1px);
}

/* Solid Yellow — primary CTA */
.btn--primary {
  background-color: var(--color-yellow);
  color: var(--color-black);
  border-color: var(--color-yellow);
}
.btn--primary:hover {
  background-color: var(--color-yellow-dark);
  border-color: var(--color-yellow-dark);
  box-shadow: var(--shadow-yellow);
  transform: translateY(-2px);
}

/* Outline — secondary CTA over dark background */
.btn--outline {
  background-color: transparent;
  color: var(--color-white);
  border-color: rgba(255,255,255,0.4);
}
.btn--outline:hover {
  border-color: var(--color-white);
  background-color: rgba(255,255,255,0.05);
  transform: translateY(-2px);
}

/* Outline Yellow */
.btn--outline-yellow {
  background-color: transparent;
  color: var(--color-yellow);
  border-color: var(--color-yellow);
}
.btn--outline-yellow:hover {
  background-color: var(--color-yellow);
  color: var(--color-black);
  transform: translateY(-2px);
}

/* WhatsApp */
.btn--whatsapp {
  background-color: #25D366;
  color: var(--color-white);
  border-color: #25D366;
  gap: var(--space-3);
}
.btn--whatsapp:hover {
  background-color: #1ebe5c;
  border-color: #1ebe5c;
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(37,211,102,0.35);
}

/* Sizes */
.btn--sm {
  font-size: var(--text-xs);
  padding: var(--space-2) var(--space-5);
}
.btn--lg {
  font-size: var(--text-base);
  padding: var(--space-5) var(--space-10);
}

/* Icon inside button */
.btn svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}
.btn--lg svg {
  width: 20px;
  height: 20px;
}