* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
body {
      background: url(../img/background.jpg) no-repeat center center fixed;
      background-size: cover;
}

.logo {
    max-width: 250px;
    width: 100%;
    transform: translate(-50%, -50%);
    position: absolute;
    top: 50%;
    left: 50%;
}
.logo__img {
    width: 100%;
}