.progress-step.complete{background:var(--accent)}.sticky-whatsapp.visible{opacity:1;transform:scale(1)}.btn-loading{opacity:.7;cursor:not-allowed;pointer-events:none}.btn-loading::after{content:"";width:16px;height:16px;margin-left:8px;border:2px solid white;border-top-color:transparent;border-radius:50%;display:inline-block;animation:spin .8s linear infinite}.success-message{animation:slideIn .5s ease-out;background:linear-gradient(135deg,#d1fae5 0%,#a7f3d0 100%);color:#065f46;padding:18px;border-radius:12px;margin-top:16px;text-align:center;font-weight:600;box-shadow:var(--shadow)}