.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--of-space-3);
  padding: 1rem 1.75rem;
  font-family: var(--of-font-body);
  font-size: var(--of-fs-sm);
  font-weight: 600;
  letter-spacing: 0.02em;
  text-decoration: none;
  border: none;
  border-radius: var(--of-radius-pill);
  cursor: pointer;
  transition: all var(--of-trans);
  overflow: hidden;
  white-space: nowrap;
}

.btn i { font-size: 1.25em; transition: transform var(--of-trans); }
.btn:hover i { transform: translateX(4px); }

.btn-primary {
  background: var(--of-grafito);
  color: var(--of-blanco);
}
.btn-primary:hover {
  background: var(--of-azul);
  color: var(--of-blanco);
  transform: translateY(-2px);
  box-shadow: var(--of-shadow-lg);
}

.btn-cyan {
  background: var(--of-grad-cyan);
  color: var(--of-blanco);
}
.btn-cyan:hover {
  color: var(--of-blanco);
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(43, 184, 196, 0.4);
}

.btn-coral {
  background: var(--of-grad-coral);
  color: var(--of-blanco);
}
.btn-coral:hover {
  color: var(--of-blanco);
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(255, 122, 107, 0.4);
}

.btn-ghost {
  background: transparent;
  color: var(--of-blanco);
  border: 1.5px solid rgba(255,255,255,0.3);
}
.btn-ghost:hover {
  background: var(--of-blanco);
  color: var(--of-grafito);
  border-color: var(--of-blanco);
}

.btn-outline {
  background: transparent;
  color: var(--of-grafito);
  border: 1.5px solid var(--of-grafito);
}
.btn-outline:hover {
  background: var(--of-grafito);
  color: var(--of-blanco);
}

.btn-link {
  display: inline-flex;
  align-items: center;
  gap: var(--of-space-2);
  font-weight: 600;
  color: var(--of-azul);
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  position: relative;
}

.btn-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 1px;
  background: currentColor;
  transform-origin: right;
  transform: scaleX(0);
  transition: transform var(--of-trans);
}

.btn-link:hover::after {
  transform-origin: left;
  transform: scaleX(1);
}

.btn-link i { transition: transform var(--of-trans); }
.btn-link:hover i { transform: translateX(4px); }

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--of-blanco);
  color: var(--of-azul);
  border: none;
  cursor: pointer;
  box-shadow: var(--of-shadow-sm);
  transition: all var(--of-trans);
}
.btn-icon:hover {
  transform: scale(1.1);
  box-shadow: var(--of-shadow);
}

.btn-whatsapp {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: #25D366;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  box-shadow: 0 8px 24px rgba(37, 211, 102, 0.4);
  z-index: 998;
  transition: transform var(--of-trans);
}
.btn-whatsapp:hover {
  transform: scale(1.1);
  color: white;
}