html {
    --main-a: #0060df;
    --header-border: #ccddff;
    --header-button-1: #ffffff;
    --header-button-2: #ccddff;
    --bg: #fff;
    --rlogo: url(retrotube.gif);
    --hr: #aaa;
    --header-combo: linear-gradient(#bbb, #ddd);
    --card-msg-1: #ffffdd;
    --card-msg-2: #ffddaa;
    --txtcol: #000;
    --buttoncol: rgb(216, 216, 216);
    --card-blue-1: #ddeaff;
    --card-blue-2: #6699cc;
    --card-gray-1: #eee;
    --card-gray-2: #ccc;
    --inputlol: #fff;
    --colblack: #000;
}
html[data-theme='dark'] {
    --main-a: #cecece;
    --header-border: #4d4d4d;
    --header-button-1: #202020;
    --header-button-2: #161616;
    --bg: rgb(17, 17, 17);
    --rlogo: url(rtdark.png);
    --hr: #727272;
    --header-combo: linear-gradient(#202020, #161616);
    --card-msg-1: #3f3f28;
    --card-msg-2: #664719;
    --txtcol: #cecece;
    --buttoncol: #282828;
    --card-blue-1: #393d44;
    --card-blue-2: #205081;
    --card-gray-1: rgb(53, 53, 53);
    --card-gray-2: rgb(73, 73, 73);
    --inputlol: #161616;
    --colblack: #cecece;
}
html[data-theme='olive'] {
    --rlogo: url(pic_youtubelogo_123x63.gif);
}

input {
    background-color: var(--inputlol);
}

* {
    color: var(--txtcol);
}

button {
    background-color: var(--buttoncol);
}


body {
    background-color: var(--bg);
    padding: 0px;
    margin: auto;
    width: 50em;
    font-family: Tahoma, Verdana, Arial, sans-serif;
}

hr {
    margin: 5px 0px;
    border-style: dotted;
    border-width: 0.5px;
    border-color: var(--hr);
}

.header {
    border-radius: 10px 10px 0 0;
    background: var(--header-combo);
    display: flex;
    padding: 10px;
    margin-bottom: 20px;
}

.header center {
    text-align: unset;
    margin: auto;
}

body center {
    display: flex;
    align-items: center;
    justify-content: center;
}

body center > * {
    margin: 0px 5px;
}

.container-flex {
    display: flex;
}

.col-1-2 {
    flex: 1 1 50%;
    padding: 5px;
}

.col-1-3 {
    flex: 1 1 33.33%;
    padding: 5px;
}

.col-2-3 {
    flex: 1 1 66.66%;
    padding: 5px;
}

.col-1-4 {
    flex: 1 1 25%;
    padding: 5px;
}

.col-generic {
    flex: 1 1;
}
.col-nogrow{
    flex: 0 1;
}
html, body {
    font-family: "Arial", "Helvetica", sans-serif;
}

.card.message {
    color: var(--txtcol);
    background-color: var(--card-msg-1);
    border: 1px solid var(--card-msg-2);
    padding: 7px 15px;
    font-size: 12px;
    border-radius: 7px;
}

.card{
    margin: 5px 0px;
}

.card.message .card-header {
    font-weight: bold;
    color: #aa6600;
    margin-bottom: 7px;
    font-size: 16px;
}

a {
    color: var(--main-a);
    text-decoration: none;
}

.input-group{
    margin: 5px 0px;
    display: flex;
}
.card.blue, .card.gray{
    padding: 10px;
    font-size: 12px;
}
.card.blue{
    background-color: var(--card-blue-1);
    border: 1px solid var(--card-blue-2);
}
.card.gray{
    background-color: var(--card-gray-1);
    border: 1px solid var(--card-gray-2);
}
.input-group label{
    font-weight: bold;
    text-align: right;
    vertical-align: middle;
    margin: auto;
    margin-top: .25em;
}
.input-group > *{
    padding: 0px;
    width: 50%;
    max-width: 50%;
    min-width: 50%;
}
.input-group > *:last-child{
    margin-left: 5px;
}
input{
    box-sizing: border-box;
}
.red{
    color: #ff0000;
}
.black{
    color: var(--colblack);
}