html {
    height: 100%;
}
body {
    margin: 0;
    min-height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    font-family: Arial, sans-serif;
}
.hidden {
    display: none !important;
}

.centered-container {
    flex-grow: 1;
    min-height: 100%;
    width: 70%;
    min-width: 1000px;
    display: flex;
    flex-direction: column;
    box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.5);
}
header {
    display: flex;
    background: #f2fff2;
}
header .pic-box {
    width: 200px;
    flex-shrink: 0;
    background-position: top left;
    background-repeat: no-repeat;
    background-size: 100% 100%;
}
header .heading {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    font-size: 16pt;
    padding: 1em 1em;
    max-width: 1200px;
}
header .heading .conference-topic {
    color: #f80;
    margin: 0.5em 0;
    font-size: 24pt;
    font-family: Monotype Corsiva, Arial, sans-serif;
}
header .logo {
    min-width: 130px;
    margin: 1em;
    background: url("images/60anniv.png") center right no-repeat;
    background-size: contain;
}

.conference-info {
    display: flex;
}
.flex-separator {
    flex-grow: 1;
}


.sub-header {
    height: 1em;
    font-size: 12pt;
    font-weight: bold;
    color: #fff;
    background: #090;
    text-align: right;
    transition: 200ms;
}
.sub-header.loading {
    background: #070;
}

.main-container {
    display: flex;
    flex-grow: 1;
}

nav.sidebar-container {
    display: block;
    background: #f2fff2;
    font-size: 12pt;
    padding: 1em;
    width: 200px;
    box-sizing: border-box;
    flex-shrink: 0;
}
ul.vertical-nav {
    display: flex;
    flex-direction: column;
    list-style: none;
    margin: 0;
    padding: 0;
}
ul.vertical-nav li {
    padding: 0 0;
}
.simple-list{
	list -style:none;
	padding: 0;
	marging: 0;
}
.vertical-nav a, .vertical-nav a:visited {
    display: block;
    color: #080;
    padding: 0.3em 1em;
    border-left: 0.2em solid #aca;
    text-decoration: none;
    white-space: nowrap;
    font-weight: bold;
}
.vertical-nav a:hover {
    color: #333;
    text-decoration: underline;
    background: rgba(0, 0, 0, 0.05);
    border-color: #8af;
}

footer {
    display: flex;
    justify-content: center;
    background: #060;
    padding: 0.5em;
}
.footer-text {
    color: #fff;
}

.content-container {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    width: 100%;
}
.content-header {
    font-size: 18pt;
    padding: 0.5em 1em;
    background: #ffc;
    border-bottom: 0.1em solid #090;
    color: #f80;
}
.content-wrapper {
    flex-grow: 1;
    background: #ffd;
    padding: 0 2em 1em;
    font-size: 12pt;
}
.content-wrapper h1 {
    font-size: 18pt;
    color: #2a2;
}
.content-wrapper h2 {
    font-size: 16pt;
    color: #060;
}
.content-wrapper p {
    margin: 1em 0 0;
    color: #222;
    font-size: 1em;
}
.content-wrapper table td {
    padding: 0.2em 4ch 0.2em 0;
}
.content-wrapper ul.simple-list {
    padding: 0 0 0 1.5em;
    margin: 0;
    list-style: square;
}
.content-wrapper > *:first-child {
    margin-top: 1em;
}
.content-wrapper a, .content-wrapper a:visited {
    color: #48f;
    text-decoration: none;
}
.content-wrapper a:hover {
    color: #2a2;
    text-decoration: underline;
}
.content-wrapper .subblock {
    display: block;
    margin-left: 2em;
}

.text-justify {
    text-align: justify;
}
.text-center {
    text-align: center;
}

/*--- Registration ---*/
form#reg_form {
    display: flex;
    flex-direction: column;
    align-items: center;
}
.form-row-group {
    border-top: 1px solid #888;
    padding: 2em 2em;
}
.form-row-group:first-of-type {
    border: none;
}
.form-row-group *:first-child {
    margin-top: 0;
}
input, select, textarea, button {
    font-size: 13pt;
    font-family: Arial, sans-serif;
    width: 50ch;
    padding: 0.3em;
    display: block;
    box-sizing: border-box;
    margin-top: 1em;
    border: 1px solid #666;
}
textarea {
    resize: none;
    height: 8em;
}
option {
    color: black;
    font-style: normal;
}
input::placeholder, option.placeholder, select:invalid, textarea::placeholder {
    color: #777;
    font-style: italic;
}
input:invalid, select:invalid {
    outline: rgba(220, 20, 20, 0.8) solid 1px;
    outline-offset: 2px;
}
.radio-group {
    display: flex;
    flex-direction: row;
    margin-top: 0.5em;
}
input[type=radio] {
    display: none;
}
.radio-group label {
    text-align: center;
    display: block;
    padding: 0.3em;
    width: 50%;
    height: 100%;
    margin: 0;
    border: 1px solid #888;
    box-sizing: border-box;
    background: white;
    cursor: pointer;
}
.radio-group label:hover {
    background: #ddf;
}
input[type=radio]:checked + label {
    background: #8af;
    color: white;
}
button {
    cursor: pointer;
    background: #bbf;
}
button:hover {
    background: #8e8;
}
button:active {
    background: #ffa;
}

.notification {
    margin-top: 1em;
    text-align: center;
}
.notification .on-success {
    color: #2d2;
}
.notification .on-error {
    color: #d22;
}

@media only screen and (max-width: 1080px) {
    body {
        min-width: 1080px;
    }
    .centered-container {
        width: 100%;
    }
}