index.css

body {
    padding: 2em;
    background: #eee;
    font-family: 'Lato', sans-serif;
    font-size: 1.125em;
    color: #000;
}

main {
    margin: auto;
    padding: 1em;
    max-width: 1280px;
    background: #fff;
    box-shadow: 0 0 8px rgba(127, 127, 127, 0.5);
    overflow: hidden;
}

header {
    padding-bottom: 1em;
    border-bottom: 1px solid #eee;
    text-align: center;
}
header h1 {
    margin: 0;
    font-size: 2.5em;
}
header div.subtitle {
    font-size: 1.5em;
    color: #26b;
}
header div.when-and-where {
    margin: 0.5em 0;
}

nav {
    border-bottom: 1px solid #eee;
}
nav > ul {
    display: flex;
    flex-flow: row wrap;
    justify-content: center;
    align-items: center;
    margin: 0;
    padding: 0;
    list-style: none;
}
nav > ul > li {
    position: relative;
    padding: 0.5em;
    font-size: 1.25em;
}
nav > ul li.selected {
    color: #26b;
}
nav a, nav a:visited {
    text-decoration: none;
    color: inherit;
}
nav > ul > li > ul {
    display: none;
}
nav > ul > li:hover > ul, nav > ul > li > ul:hover {
    display: block;
    position: absolute;
    z-index: 1;
    margin: 0;
    margin-top: 0.5em;
    border: 1px solid #eee;
    padding: 0;
    background: rgba(255, 255, 255, 0.75);
    list-style: none;
    color: #000;
}
nav > ul > li > ul > li {
    padding: 0.5em;
}

div.banner {
    display: flex;
    position: relative;
    margin: 0.5em;
    flex-flow: column;
    justify-content: center;
    overflow: hidden;
    max-height: 308px;
}
div.banner img {
    display: block;
    width: 100%;
    height: auto;
}
div.banner div.attribution {
    position: absolute;
    right: 0;
    bottom: 0;
    border-top-left-radius: 8px;
    padding: 0.25em;
    font-size: 0.75em;
    background: #000;
    color: #fff;
    opacity: 0.75;
}
div.banner div.attribution a, div.banner div.attribution a:visited {
    color: #9bd;
    text-decoration: none;
}

article {
    display: flex;
    flex-flow: row wrap;
    justify-content: center;
    align-items: stretch;
}

article > section {
    flex: 1 1 auto;
    box-sizing: border-box;
    padding: 1em;
}
article > section > section {
    margin: auto;
}

#payload {
    flex: 1.5 1 auto;
    width: 512px;
}

#social-media {
    max-width: 512px;
}
#social-media iframe {
    max-height: 786px;
}
a.twitter-timeline {
    display: block;
    margin: auto;
    text-align: center;
    text-decoration: none;
}

footer {
    border-top: 1px solid #eee;
    padding-top: 0.5em;
    text-align: center;
    color: #26b;
}

div.photos {
    text-align: center;
}
div.photo {
    float: right;
    margin-left: 1em;
    margin-bottom: 1ex;
}
figure {
    display: inline-block;
    margin: 0.25em;
    text-align: center;
}
figure img {
    box-shadow: 0 0 4px rgba(127, 127, 127, 0.5);
    width: 144px;
}
div.fullsize-photo figure img {
    width: 100%;
}

table {
    margin: auto;
}
table, col {
    width: auto !important;
}
th {
    text-align: center !important;
}
th, td {
    padding: 0.5em;
    vertical-align: top;
}
td em {
    font-size: 75%;
}

h1, h2, h3, h4, h5, h6 {
    text-align: center;
    font-weight: normal;
    color: #26b;
}

p {
    text-align: justify;
}
li p {
    text-align: unset;
}
#schedule~table td {
    text-align: justify !important;
}

span.unbreakable {
    white-space: pre;
}

a, a:visited {
    color: #26b;
}

.even {
  background-color: lightgrey
}