body {
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    font-family: Arial, sans-serif;
}

.hello-container {
    text-align: center;
}

h1 {
    font-size: 48px;
    color: #333;
}