:root {
    --font-size: 1.2em;
    --span: 8px;
    --span-half: calc(var(--span) / 2);
    --span-double: calc(var(--span) * 2);
    --border: 1px;
    --border-double: calc(var(--border) * 2);
    --paper-width: 384px;
    --anim-time: 0.5s;
    --fore-color: #111;
    --back-color: #eee;
    --canvas-back: #fff;
    --curve: cubic-bezier(.08,.82,.17,1);
    --panel-height: 20em;
    --target-color: rgba(0, 255, 0, 0.2);
    --notice-color: rgba(0, 0, 255, 0.2);
    --notice-warning: rgba(255, 128, 0, 0.2);
    --notice-error: rgba(255, 0, 0, 0.2);
}

body.no-animation *,
body.no-animation *::before,
body.no-animation *::after {
    transition-duration: 0ms !important;
    transition: none;
    animation-timing-function: steps(1);
    animation-duration: 0ms !important;
}

body {
    border: none;
    background-color: var(--back-color);
    color: var(--fore-color);
    font-size: var(--font-size);
    font-family: 'Noto Sans', 'Segoe UI', sans-serif;
    overflow: auto;
    margin: 1em 0;
}
h1 {
    font-size: 1.5em;
    font-weight: normal;
    margin: var(--span-half) 0;
}
a:link, a:visited {
    color: #33f;
}
a:hover, a:active {
    color: #22f;
}
a {
    transition: all var(--anim-time) ease-out;
}
.center {
    text-align: center;
}
button, input, select, textarea {
    font: inherit;
    color: var(--fore-color);
}
button, input[type="number"], input[type="text"], select {
    margin: var(--span-half) var(--span);
    border: var(--border) solid var(--fore-color);
    padding: var(--span-half) var(--span);
    background-color: transparent;
    transition: all var(--anim-time) var(--curve);
    cursor: pointer;
    min-width: 6em;
    display: inline-block;
}
input[type="number"], input[type="text"] {
    width: 6em;
    cursor: text;
}
button:hover {
    margin: 0;
    padding: var(--span) calc(var(--span-double));
    min-width: calc(6em + var(--span-double));
}
button:active {
    box-shadow: 0 0 var(--span) inset var(--fore-color);
}
#notice {
    min-height: var(--font-size);
    background-color: var(--notice-color);
    /* border: var(--border) solid var(--fore-color); */
}
#notice.warning, #button-exit {
    background-color: var(--notice-warning);
}
#notice.error {
    background-color: var(--notice-error);
}
.noscript {
    background-color: var(--notice-error);
}
main, header, footer {
    max-width: 45em;
    margin: 1em auto;
    display: flex;
    flex-direction: row;
    /* flex-wrap: wrap; */
}
main>.left {
    flex-grow: 1;
    /* position: sticky; */
    /* top: 0; */
    height: 100%;
    overflow: auto;
    margin: var(--span);
    min-width: 12em;
}
main>.right {
    flex-grow: 0;
    margin: 0 auto;
    height: 100%;
    overflow: auto;
    text-align: center;
    min-width: calc(var(--paper-width) + var(--border-double) + var(--span-double));
}
canvas#preview, canvas#control-canvas, #control-document {
    border: var(--border) solid var(--fore-color);
    background-color: var(--canvas-back);
    width: var(--paper-width);
    display: inline-block;
}
#control-document {
    font: initial;
    font-size: 16px;
    font-family: 'Unifont';
    text-align: initial;
    color: #000;
}
#control-document.normal-font {
    font-family: inherit;
    font-size: inherit;
}
canvas#preview {
    z-index: 0;
}
canvas#control-canvas,
#control-document {
    position: absolute;
    opacity: 0;
    transition: opacity var(--anim-time) var(--curve);
    z-index: 1;
}
canvas#control-canvas:hover,
#control-document:hover {
    opacity: 1;
}
canvas#control-canvas.disabled,
#control-document.disabled {
    display: none;
}
p {
    margin: var(--span) 0;
}
.panel {
    border: var(--border) solid currentColor;
    height: calc(var(--font-size) + 8px);
    overflow: hidden;
    /* scrollbar-width: thin; */
    transition: height var(--anim-time) var(--curve);
    padding: 0 var(--span);
    margin: var(--span) 0;
}
.panel::before {
    float: left;
}
.panel:not(.sub)::before { content: '📌'; }
.panel.sub::before { content: '📎'; }
.panel.sub {
    border-width: var(--border) 0 0 0;
}
.panel.expanded {
    height: var(--panel-height);
    animation: delay-scrollable var(--anim-time) steps(1) 0s 1 forwards;
    /* overflow-y: scroll; */
}
.panel.sub.expanded {
    height: calc(var(--panel-height) / 2);
}
.panel>:nth-child(1),
.panel>:nth-child(1):link,
.panel>:nth-child(1):visited {
    display: block;
    margin: var(--span-half);
    text-decoration: none;
    text-align: center;
    color: var(--fore-color);
}
.panel>:nth-child(1)::before {
    content: '>>';
    display: inline-block;
    position: relative;
    opacity: 0;
    width: 0;
    overflow: visible;
    right: 2.5em;
    transition: all var(--anim-time) var(--curve);
}
.panel>:nth-child(1):hover::before,
.panel>:nth-child(1):active::before {
    opacity: 1;
    right: 1.5em;
}
input[type="range"] {
    width: 10em;
    vertical-align: middle;
    content: attr(value);
}
@keyframes hint {
    0% { box-shadow: 0 0 var(--span-) inset transparent; }
    50% { box-shadow: 0 0 var(--span) inset var(--fore-color); }
    100% { box-shadow: 0 0 var(--span) inset transparent; }
}
.hint {
    animation: hint 3s ease-out 0.1s infinite;
}
#hidden, .hidden { display: none; }
#error-record {
    font-family: 'DejaVu Sans Mono', 'Consolas', monospace;
    width: 100%;
    font-size: 1rem;
    overflow: auto;
    white-space: pre;
    height: calc(var(--panel-height) - var(--border-double) * 4);
}
.table-wrap {
    overflow-x: auto;
    width: 100%;
}
table#jslicense-labels1 {
    min-width: 40em;
}
table#jslicense-labels1 td {
    padding: var(--span-half) var(--span);
}
*:target {
    background-color: var(--target-color);
}
dl {
    margin: var(--span) 0;
    display: block;
}
hr {
    border: none;
    border-top: var(--border) solid var(--fore-color);
}

@keyframes delay-scrollable {
    from { overflow: hidden; }
    to { overflow: auto; }
}
@media (max-width: 800px) {
    :root {
        --panel-height: 16em;
        /* --font-size: 1em; */
    }
    main {
        flex-direction: column;
    }
    main>.left {
        /* height: 16em; */
        overflow: auto;
        width: calc(100% - var(--span-double) - var(--border-double));
    }
    main>.right {
        min-width: unset;
    }
}
@media (max-width: 384px) {
    canvas#preview, canvas#control-canvas, #control-document {
        width: calc(100% - var(--border-double));
    }
}
@media (prefers-color-scheme: dark) {
    :root {
        --fore-color: #eee;
        --back-color: #333;
        /* --canvas-back: #666; */
    }
    a:link, a:visited {
        color: #66f;
    }
    a:hover, a:active {
        color: #77f;
    }
    canvas#preview, canvas#control-canvas, #control-document {
        filter: brightness(0.5);
    }
}
@font-face {
    font-family: 'Unifont';
    src: local('Unifont') url('unifont.ttf') url('unifont.otf');
}