.arquivo-img {
    width: 80%;
    aspect-ratio: 2 / 3;
    height: auto;
    overflow: hidden;
    background-image: url("img/logo.svg");
    background-position: center;
    background-size: 40%;
    background-repeat: no-repeat;
    background-color: #fff;
}

    .arquivo-img::after {
        content: "";
        width: 80px;
        height: 80px;
        position: absolute;
        top: -45px;
        left: -45px;
        transform: rotate(45deg);
        background: rgb(var(--bg-body));
    }