html, body {
    height: 100vh;
    margin: 0;
    padding: 0;
}

body {
    display: flex;
    justify-content: center;   
    align-items: center;     
    text-align: center;       
    font-family: Arial, sans-serif;
    background-color: #f5f5f5; 
}

div {
    background-color: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}