body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    color: #333;
    text-align: center;
    padding: 50px;
}
.container {
    max-width: 600px;
    margin: 0 auto;
    background: #fff;
    padding: 60px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.alert {
  animation: moveUpDown .3s .5s 2 alternate;
}

@keyframes moveUpDown {
  0%, 100% {
    transform: translateX(0);
  }
  50% {
    transform: translateX(-15px);
  }
}


img {
    max-width: 100%;
    height: auto;
}
h1 {
    font-size: 1.5em;
    margin: 20px 0;
}