html, body {
    height: 100%;
    margin: 0;
}
body {
    background-color: rgba(0,0,0,0.05);
    display: flex;
    justify-content: center;
    align-items: center;
}
.main {
    width: 780px;
    height: 220px;
    display: flex;
    align-items: center;
    background: white;
    border: 5px solid #2a85b3;
    border-radius: 20px;
    text-align: center;
    margin: 0 25px;
}
.main .welcome {
    width: 100%;
}
.main .welcome strong {
    font-size: 20px;
    display: block;
}
.main .welcome .copyright {
    margin-top: 50px;
}
@media (min-width: 768px) {
    .main .welcome strong {
        display: inline-block;
        font-size: 25px;
        margin: 0;
    }
}