app.css

/* BASICODE in the Browser demonstration
 * (c) 2017 Rob Hagemans
 * Released under the Expat MIT licence
 */

html {
    height: 100%;
    padding: 0;
}

body {
    height: 100%;
    background-color: #222;
    padding: 0;
    margin: 0;
    overflow: hidden;
}

small {
    display: block;
    right: 0;
    left: 0;
    text-align: center;
    color: #555;
    font-family: sans-serif;
    position: fixed;
    bottom: 0px;
    background-color: #111;
    padding: 1em;
    height: 3%;
}

small a, small a:visited {
    color: #555;
}


/* display */

#screen {
    float: left;
    padding-left: 1%;
    width: 50%;
}

#screen-wrapper {
    /* 4*3 aspect ratio */
    position: relative;
    padding: 0;
    width: 100%;
    float: left;
    padding-bottom: 75%;
}
#screen-wrapper > div {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
}

h1 {
    color: #555;
    font-family: sans-serif;
    padding: 0 0.5em 0 0.5em;
    margin-top: 0;
    font-size: 100%;
    font-weight: blod;
    background-color: black;
    border-top: 0.4em solid black;
    border-bottom: 1px solid black;
    height: 1.4em;
}

.basicode {
    width: 100%;
    height: 100%;
    background-color: #333;
    outline: none;
}

.basicode:focus {
}

.buttons {
    background-color: #111;
}

.buttons button, #printer button {
    background-color: black;
    color: #555;
    outline: none;
    border: none;
    padding: 0.5em 1.5em 0.5em 1.5em;
    float: right;
    margin-top: 0.5em;
    margin-bottom: 0;
}

.buttons button:hover, .keyboard button:hover, .keyboard .pressed {
    background-color: #111;
    color: #999;
}

/* soft keybaord */

.keyboard {
    background-color: #111;
    float: right;
    width: 100%;
    margin-top: 1%;
}
.keyboard button {
   background-color: black;
   color: #555;
   outline: none;
   border: none;
   padding: 0.5em 0.5em 0.5em 0.5em;
   float: left;
   margin: 0;
   width: 7%;
   height: 2.2em;
   overflow: hidden;
   border: 1px solid #222;
   font-size: 0.8em;
}
.keyboard button.fill {
    width: 8%;
}
.keyboard button.wide {
    width: 9%;
}
.keyboard button.double {
    width: 14%;
}
.keyboard button.widedouble {
    width: 15%;
}
.keyboard button.bar {
    width: 72%;
}
.keyboard .shift {
    display: none;
}
/* storage visualisation */

.floppy {
    box-sizing: border-box;
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 2em 1em 2em 1em;
    word-wrap: break-word;
    overflow: scroll;
}
.floppy a {
    font-family: sans-serif;
    padding: 0 0.2em 0 0.2em;
    margin: 0.1em 0 0.1em 0;
    color: #999;
    text-decoration: none;
}
.floppy .hidden {
    color: #222;
    padding: 0 0.2em 0 0.2em;
    margin: 0.1em 0 0.1em 0;
}
.floppy .title {
    color: #555;
    padding: 0 0.2em 0 0.2em;
    margin: 0.1em 0 0.1em 0;
    font-style: italic;
}
.floppy a:hover, .floppy a:hover .hidden {
    background-color: steelblue;
    color: black;
}
.floppy .delete:hover {
    background-color:red;
}
.floppy .delete:hover ~ a {
    background-color:red;
    color: black;
}
.floppy .delete:hover ~ a .hidden,  .floppy .delete:hover ~ .hidden{
    color:red;
}
.floppy .download:hover {
    background-color:green;
}
.floppy .download:hover ~ a {
    background-color:green;
    color: black;
}
.floppy .download:hover ~ a .hidden,  .floppy .download:hover ~ .hidden{
    color: green;
}


.floppy ul, .floppy ol {
    font-family: sans-serif;
    list-style-type: none;
    padding: 0.5em 0 0 0;
    margin-top:0;
    margin-bottom: 1.5em;
}
.floppy ul > li {
    padding: 0.5em 0 0 0;
    background-color: #999;
    color: black;
    font-weight: bold;
}

.floppy ol > li {
    background-color: black;
    color: red;
    font-weight: normal;
}
.floppy ol > li:first-child {
    padding: 0.2em 0 0 0;
}
.floppy ol > li:last-child {
    padding: 0 0 0.2em 0;
}

/* Tabbed example */
/* https://www.w3.org/Style/Examples/007/target.en.html#tab3 */
div.tabs {
    margin-top: 1em;
    margin-left: 52%;
    width: 47%;
    margin-bottom: 0;
    height: 100%;
    position: relative;
    z-index: 0;
    background: black;
    border-top: 0.4em solid black;
}
div.tabs > div {
    float: left;
    padding: 0;
    margin: 0;
    background: black;
    max-width: 14.25%;
}
div.tabs > div > a {
    font-family: sans-serif;
    text-decoration: none;
    color: #555;
    padding: 0.2em 1em 0.2em 1em;
    margin: 0;
    border-top: 0.2em solid black;
    border-bottom: 1px solid black;
}
/* inactive tabs */
div.tabs > div:not(:target) > a {
    background: black;
}
/* active or default tab */
div.tabs > div:target > a {
    background: #222;
    color: #aaa;
    border-top: 0.15em solid lightblue;
    border-bottom: 0.15em solid #222;
}
/* tab content */
div.tabs > div > div {
    background: #222;
    border: none;
    z-index: -2;
    left: 0;
    top: 1.3em;
    bottom: 0;
    right: 0;
    padding-top: 0.3em;
    position: absolute;
    border-top: 0.15em solid black;
}
/* visible tab content */
div.tabs > div:target > div {
    z-index: -1;
}

#printer0, #listing0, #info0, form {
    border: none;
    margin: 0;
    padding: 0;
    color: grey;
    background-color: #222;
    height: 93%;
    width: 100%;
    overflow: auto;
    outline: none;
}

#printer0 {
    border: 1px solid #111;
}

#listing0:focus {
    color: #999;
}

#info0 {
    font-size: 1.5em;
}

/* settings */

form {
    font-family: sans-serif;
}

.color {
    /* colour table */
    width: 100%;
}

form input, form button, form select {
    background-color: black;
    color: #999;
    border: none;
    outline: none;
}
form button {
    padding: 0.5em 1em 0.5em 1em;
    border-color: #222;
    border-style: solid;
    border-width: 0.4em 0.2em 0.4em 0.2em;
}
form button:hover {
    background-color: #111;
    color: #999;
}
form fieldset {
    border: 0.1em solid black;
}
form legend {
    color: #555;
}

#font {
    width: 100%;
}

#font > option {
    background-repeat: no-repeat;
    background-size: 10em 100%;
    padding-left: 10em;
}

@media (orientation: portrait) {
    body {
        overflow: scroll;
    }

    #screen {
        width: 98%;
    }

    div.tabs {
         margin-left: 0;
         width: 100%;
         clear: left;
    }
}