html,body {
    margin: 0;
    padding: 0;
}

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.logo {
    display: block;
    width: 100%;
    max-width: 400px;
    margin: 0;
}

.logo span {
    height: 0;
    width: 0;
    overflow: hidden;
    padding-top: 59%;
    width: 100%;
    display: block;
    background: url(../img/logo.svg) center no-repeat;
    background-size: contain
}