@keyframes slideInLeft { 0% { opacity: 0; transform: translateX(-100%); } 100% { opacity: 0.9; transform: translateX(0); } } @keyframes slideOutRight { 0% { opacity: 0.9; transform: translateX(0); } 100% { opacity: 0; transform: translateX(100%); } } .messageBox { display: flex; position: absolute; padding: 0.5rem 1.25rem; border-radius: 0 4px 4px 0; font-weight: bold; font-size: 2rem; text-align: center; z-index: 100; top: 0; left: 0; max-width: 500px; max-height: min-content; opacity: 0; } .messageBox:not(.hidden) { animation: slideInLeft 0.5s ease forwards; } .messageBox.hidden { animation: slideOutRight 0.5s ease forwards; } .success { background-color: #d1f7c4; color: #000000; border: 1px solid #a5d6a7; } .error { background-color: #ffcdd2; color: #000000; border: 1px solid #ef9a9a; }