body,
html {
    height: 100%;
}

main {
    margin: 0 auto;
    max-width: 900px;
}

header {
    background-color: #f1f1f1;
    text-align: center;
    line-height: 2em;
}

/* main {
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #e2e2e2;
} */

.herovid {
    max-width: 100%;
}