style.css

body {
    font-family: Arial, sans-serif;
    text-align: center;
    padding: 20px;
}

#content {
    margin-top: 50px;
}

.loader {
    border: 5px solid #f3f3f3;
    border-top: 5px solid #3498db;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 2s linear infinite;
    margin: auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}