.alert-container {
    position: fixed;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 500px;
    z-index: 9999;
    padding: 0 10px;
    box-sizing: border-box;
}

.alert-container .alert {
    margin-bottom: 10px;
    width: 100%;
}