.alert {
    border: 3px solid red;
    background-color: #ffe6e6;
    padding: 20px;
    text-align: center;
    width: 50%;
    margin: 0 auto;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(255, 0, 0, 0.5);
}

h1 {
    animation: blink 1s infinite;
    color: red;
    margin: 0;
}
@keyframes blink {
    0%   { opacity: 1; }
    50%  { opacity: 0; }
    100% { opacity: 1; }
}
.alert p {
    margin-top: 10px;
    color: #333;
    font-size: 1rem;
}