body {
    font-family: 'Gill Sans', sans-serif;
}

#content {
    max-width: 1024px;
    margin: 0 auto;
}

#header {
    width: 100%;
    background: linear-gradient(to right, transparent, white),
                linear-gradient(to left, transparent, white),
                url('may22_gs.jpg');
    background-position: center;
    background-clip: content-box;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

#header h1 {
    font-size: 6em;
}

#program {
    width: 80%;
    margin: 0 auto;
    border-spacing: 0px;
}

#program > tbody > tr {
    vertical-align: top;
}

#program > tbody > tr > td {
    padding-top: 1rem;
}
#program > tbody > tr > td:nth-of-type(1)  {
    text-align: right;
}
#program > tbody > tr > td:nth-of-type(2)  {
    text-align: center;
    padding-left: 0.2rem;
}
#program > tbody > tr > td:nth-of-type(3)  {
    text-align: right;
    padding-right: 1rem;
    padding-left: 0px;
}
#program > tbody > tr > td.session {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 0.75rem;
}

td.session div:nth-child(2n) {
    text-align: right;
}

#abstracts h4 {
    margin-top: 1rem;
    display: inline-block;
}

#abstracts h4 + div {
    margin-top: 1rem;
    margin-bottom: 1rem;
    margin-left: 1rem;
    float: right;
}

.callout {
    display: block;
    text-align: center;
    font-size: xxx-large;
    margin: 1rem;
}