.submit-btn.loading{opacity:.8;cursor:not-allowed}.submit-btn.loading::after{content:"";width:18px;height:18px;border:2px solid transparent;border-top:2px solid currentColor;border-radius:50%;animation:spin 1s linear infinite;margin-left:.5rem}.success-message{position:fixed;top:20px;right:20px;background:#25d366;color:white;padding:1rem 1.5rem;border-radius:12px;box-shadow:0 8px 25px rgba(0,0,0,.15);z-index:1000;font-weight:600;transform:translateX(100%);transition:transform .3s ease}.success-message.show{transform:translateX(0)}