body {
    margin: 0 auto;
    font-family: Arial, Helvetica, sans-serif;
    background-color:#ccc;
}

.container {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo{
    width: 15%;
}


@media (max-width:640px) {
    .logo{
        width: 50%;
    }
}