body {
    margin: 0;
}
.background {
    background-image: url("img.jpg");
    background-size: unset;
    background-repeat: no-repeat;
    width: 100%;
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    z-index: 0;
}
.text {
    background-image: url("txt-desktop.png");
    background-size: cover;
    background-repeat: no-repeat;
    width: 866px;
    height: 135px;
    position: fixed;
    top: 40vh;
    left: 6vw;
    z-index: 1;
}
.mail {
    background-image: url("txt-mail.png");
    background-size: cover;
    background-repeat: no-repeat;
    width: 344px;
    height: 32px;
    position: fixed;
    top: 70vh;
    left: 6vw;
    z-index: 1;
}
@media screen and (max-width: 900px) {
    .background {
        background-size: cover;
        background-position-x: center;
    }
    .text {
        background-image: url("txt-mobile.png");
        width: 526px;
        height: 174px;
        top: 6vh;
    }
    .mail {
        top: 30vh;
    }
}
@media screen and (max-width: 580px) {
    .background {
        background-size: cover;
        background-position-x: center;
    }
    .text {
        background-image: url("txt-mobile.png");
        width: 280px;
        height: 92px;
        top: 6vh;
    }
    .mail {
        width: 200px;
        height: 18px;
        top: 30vh;
    }
}
@media screen and (min-width: 901px) and (max-width: 1280px) {
    .background {
        background-size: cover;
    }
}
@media screen and (min-width: 1281px) and (max-width: 1980px) {
    .background {
        background-size: unset;
    }
}
@media screen and (min-width: 1981px) {
    .background {
        background-size: cover;
    }
}