.main {
    background-image: linear-gradient(#0000003b, #000000bd), url(background.jpg);
    background-repeat: no-repeat;
    height: 100vh;
    width: 100vw;
    padding: 0;
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
}

.innerMain {
    color: #ffffff;
    padding: 1em;
    border-radius: 3px;
    background: #535353;
    margin: 1em;
}

.innerMain a {
    color: inherit;
}