/*
 * Copyright (C) 2026 Misha Nasledov
 *
 * SPDX-License-Identifier: MIT
 */

/*
 * playground.css -- the playground's own look, tiled and not.
 *
 * Three parts. A theme, mapped onto the six colors panes.css reads, so
 * the layout wears the page's colors rather than its own. The plain
 * page: what these sections look like as a document, which is what
 * anybody on a phone gets. And the few rules a tiled page owes its
 * panes -- which of its boxes takes the room there is.
 */

:root
{
    color-scheme: light dark;

    --bg: #f5f6f8;
    --surface: #ffffff;
    --surface-2: #eef0f4;
    --text: #1b1e24;
    --muted: #616875;
    --line: #dde1e8;
    /* The logo's purple, #b48cff, made darker for a light page: as it
       is, it is too faint against white to mark the tab in front. */
    --accent: #7f42f0;
    --on-accent: #ffffff;
    --logo: #b48cff;
    --good: #1f9d6b;
    --warn: #b7791f;
    --bad: #d64545;

    --t-com: #8a919e;
    --t-str: #2f8a4f;
    --t-num: #b35c00;
    --t-key: #7340c7;
    --t-fn: #2c6cc4;
    --t-prop: #2c6cc4;
    --t-sel: #a3337a;
    --t-tag: #a3337a;
    --t-attr: #b35c00;

    --pane-fg: var(--text);
    --pane-bg: var(--surface);
    --pane-dim: var(--muted);
    --pane-panel: var(--surface-2);
    --pane-line: var(--line);
    --pane-held: var(--accent);

    --mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark)
{
    :root
    {
        --bg: #0e1014;
        --surface: #16191f;
        --surface-2: #1d2129;
        --text: #e5e7eb;
        --muted: #8c94a3;
        --line: #2a2f39;
        --accent: #b48cff;
        --on-accent: #16191f;
        --good: #3ccf91;
        --warn: #e0a64a;
        --bad: #ff6b6b;

        --t-com: #6b7280;
        --t-str: #9ece6a;
        --t-num: #ff9e64;
        --t-key: #bb9af7;
        --t-fn: #7aa2f7;
        --t-prop: #7dcfff;
        --t-sel: #f7768e;
        --t-tag: #f7768e;
        --t-attr: #e0af68;
    }
}

*, *::before, *::after { box-sizing: border-box; }

body
{
    margin: 0;
    font: 14px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif;
    color: var(--text);
    background: var(--bg);
}

a { color: var(--accent); }

button
{
    font: inherit;
    color: inherit;
    cursor: pointer;
}

kbd
{
    display: inline-block;
    min-width: 1.5em;
    padding: 0 0.35em;
    font: 0.85em/1.5 var(--mono);
    text-align: center;
    background: var(--surface-2);
    border: 1px solid var(--line);
    border-bottom-width: 2px;
    border-radius: 4px;
}

.grow { flex: 1 1 auto; }

.aside { margin: 0.5em 0; font-size: 0.9em; color: var(--muted); }

/* ---- the header ---- */

.bar
{
    display: flex;
    align-items: center;
    gap: 0.9em;
    padding: 0.55em 1em;
    background: var(--surface);
    border-bottom: 1px solid var(--line);
}

.brand
{
    display: flex;
    align-items: center;
    gap: 0.45em;
    font-weight: 650;
    font-size: 1.05em;
    letter-spacing: -0.01em;
    color: var(--text);
    text-decoration: none;
}

.brand svg { width: 1.3em; height: 1.3em; }
.brand rect { fill: var(--logo); }
.brand path { stroke: #ffffff; stroke-width: 1.6; }

.what { color: var(--muted); }

.bar > a:not(.brand)
{
    white-space: nowrap;
    font-size: 0.9em;
    color: var(--muted);
    text-decoration: none;
}

.bar > a:not(.brand):hover { color: var(--text); }

.modes
{
    display: flex;
    padding: 2px;
    margin-left: 0.6em;
    background: var(--surface-2);
    border: 1px solid var(--line);
    border-radius: 7px;
}

.modes button
{
    padding: 0.15em 0.9em;
    font-size: 0.9em;
    color: var(--muted);
    background: transparent;
    border: 0;
    border-radius: 5px;
}

.modes button[aria-pressed="true"]
{
    color: var(--text);
    background: var(--surface);
    box-shadow: 0 1px 2px rgb(0 0 0 / 0.12);
}

/* Quiet until there is something to undo. */
.undo
{
    padding: 0.15em 0.7em;
    font-size: 0.9em;
    color: var(--text);
    background: transparent;
    border: 1px solid var(--line);
    border-radius: 6px;
}

.undo:hover:not(:disabled) { border-color: var(--muted); }
.undo:disabled { color: var(--muted); opacity: 0.55; cursor: default; }

html.touch .undo { padding: 0.15em 0.55em; }
html.touch .undo .label { display: none; }

/* What only makes sense one side of the threshold. */
body:not(.tiled) .undo,
body:not(.tiled) .modes,
body:not(.tiled) .to-plain,
body.tiled .to-tiled,
html:not(.forced) .to-tiled,
body.tiled .plain-note,
html.forced .if-narrow,
html:not(.forced) .if-forced { display: none; }

/* ---- buttons and toolbars inside the panes ---- */

.tools
{
    display: flex;
    align-items: center;
    gap: 0.7em;
    padding: 0.4em 0;
    font-size: 0.9em;
}

.tools label { display: flex; align-items: center; gap: 0.3em; color: var(--muted); }

#run, .quiet
{
    padding: 0.2em 0.8em;
    border-radius: 6px;
}

#run
{
    color: var(--on-accent);
    background: var(--accent);
    border: 1px solid transparent;
    font-weight: 550;
}

.quiet
{
    background: var(--surface-2);
    border: 1px solid var(--line);
}

.quiet:hover { border-color: var(--muted); }

.meter
{
    font: 0.85em var(--mono);
    color: var(--muted);
    white-space: nowrap;
}

/* ---- files ---- */

.files { list-style: none; margin: 0.3em 0; padding: 0; }

.files button
{
    display: flex;
    align-items: center;
    gap: 0.55em;
    width: 100%;
    padding: 0.3em 0.5em;
    text-align: left;
    background: transparent;
    border: 0;
    border-radius: 6px;
}

.files button:hover { background: var(--surface-2); }

/* A file somebody added: its name, and a way to delete it. */
#more-files li { display: flex; align-items: center; }

#more-files .del
{
    width: auto;
    flex: 0 0 auto;
    padding: 0.3em 0.5em;
    color: var(--muted);
}

#more-files .del:hover { color: var(--bad); }

#new-file { margin-top: 0.3em; }

.files button.on { background: color-mix(in srgb, var(--accent) 14%, transparent); }

.files button.edited::after
{
    content: "";
    width: 0.45em;
    height: 0.45em;
    margin-left: auto;
    border-radius: 50%;
    background: var(--muted);
}

.ext
{
    width: 1.9em;
    font: 600 0.72em var(--mono);
    text-align: center;
}

.ext-html { color: var(--t-tag); }
.ext-css { color: var(--t-fn); }
.ext-js { color: var(--t-num); }

/* ---- an editor ---- */

.editor
{
    display: flex;
    height: 20em;
    font: 13px/1.6 var(--mono);
    tab-size: 2;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 6px;
    overflow: hidden;
}

.editor .gutter
{
    flex: 0 0 auto;
    margin: 0;
    padding: 0.6em 0.7em 0.6em 0.9em;
    font: inherit;
    text-align: right;
    color: var(--muted);
    opacity: 0.6;
    background: var(--surface);
    overflow: hidden;
    user-select: none;
}

.editor .field
{
    position: relative;
    flex: 1 1 auto;
    min-width: 0;
    overflow: hidden;
}

.editor .color,
.editor textarea
{
    margin: 0;
    padding: 0.6em 0.9em 0.6em 0.3em;
    font: inherit;
    letter-spacing: normal;
    white-space: pre;
    tab-size: inherit;
    border: 0;
}

.editor .color
{
    position: absolute;
    top: 0;
    left: 0;
    min-width: 100%;
    pointer-events: none;
    color: var(--text);
}

.editor textarea
{
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    color: transparent;
    caret-color: var(--text);
    background: transparent;
    resize: none;
    outline: none;
    overflow: auto;
}

.editor textarea::selection { background: color-mix(in srgb, var(--accent) 30%, transparent); }

.editor:focus-within { border-color: var(--accent); }

.t-com { color: var(--t-com); font-style: italic; }
.t-str { color: var(--t-str); }
.t-num { color: var(--t-num); }
.t-key { color: var(--t-key); }
.t-fn { color: var(--t-fn); }
.t-prop { color: var(--t-prop); }
.t-sel { color: var(--t-sel); }
.t-tag { color: var(--t-tag); }
.t-attr { color: var(--t-attr); }

/* ---- preview ---- */

#frame
{
    display: block;
    width: 100%;
    height: 24em;
    background: #0f1320;
    border: 1px solid var(--line);
    border-radius: 6px;
}

/* ---- console ---- */

.log
{
    list-style: none;
    margin: 0;
    padding: 0;
    min-height: 6em;
    max-height: 16em;
    overflow: auto;
    font: 12.5px/1.5 var(--mono);
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 6px;
}

.log li
{
    display: flex;
    gap: 0.8em;
    padding: 0.2em 0.7em;
    border-bottom: 1px solid color-mix(in srgb, var(--line) 60%, transparent);
}

.log time { flex: 0 0 auto; color: var(--muted); opacity: 0.8; }
.log .text { flex: 1 1 auto; white-space: pre-wrap; overflow-wrap: anywhere; }
.log .where { flex: 0 0 auto; color: var(--muted); }

.log .count
{
    flex: 0 0 auto;
    align-self: center;
    padding: 0 0.45em;
    font-size: 0.85em;
    color: var(--surface);
    background: var(--muted);
    border-radius: 1em;
}

.log .lv-warn { color: var(--warn); background: color-mix(in srgb, var(--warn) 8%, transparent); }
.log .lv-error { color: var(--bad); background: color-mix(in srgb, var(--bad) 8%, transparent); }
.log .lv-sys { color: var(--muted); font-style: italic; }
.log .empty { color: var(--muted); border: 0; }

/* ---- activity ---- */

.chart
{
    position: relative;
    height: 10em;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 6px;
}

.chart canvas { position: absolute; inset: 0; width: 100%; height: 100%; }

.onscreen
{
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(9em, 1fr));
    gap: 0.2em 1em;
    list-style: none;
    margin: 0.7em 0 0;
    padding: 0;
    font-size: 0.9em;
}

.onscreen li { display: flex; align-items: center; gap: 0.45em; color: var(--muted); }
.onscreen li.on { color: var(--text); }

.dot
{
    flex: 0 0 auto;
    width: 0.55em;
    height: 0.55em;
    border-radius: 50%;
    border: 1.5px solid var(--muted);
}

.on > .dot, .dot.on { background: var(--good); border-color: var(--good); }

/* ---- keys ---- */

.keys { border-collapse: collapse; font-size: 0.92em; }
.keys td { padding: 0.3em 0.9em 0.3em 0; vertical-align: top; }
.keys td:first-child { white-space: nowrap; }
.keys tr + tr td { border-top: 1px solid var(--line); }

/* ---- the status bar ---- */

.status
{
    display: flex;
    align-items: center;
    gap: 1.4em;
    padding: 0.3em 1em;
    font-size: 0.82em;
    color: var(--muted);
    background: var(--surface);
    border-top: 1px solid var(--line);
    white-space: nowrap;
    overflow: hidden;
}

.status > span { display: flex; align-items: center; gap: 0.45em; }
.status .hint { overflow: hidden; text-overflow: ellipsis; }

#st-saved { transition: opacity 0.6s; }
#st-saved.gone { opacity: 0; }

/*
 * ---- the plain page ----
 *
 * Nothing tiled: the sections one after another, as a document. Each has
 * a heading of its own here, which a pane does not need -- its tab says
 * the same thing.
 */

body:not(.tiled) > section,
body:not(.tiled) > details,
.plain-note
{
    max-width: 52rem;
    margin: 1rem auto;
    padding: 0.2rem 1.1rem 1rem;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 10px;
}

.plain-note
{
    padding: 0.8rem 1.1rem;
    color: var(--muted);
    background: color-mix(in srgb, var(--accent) 7%, var(--surface));
    border-color: color-mix(in srgb, var(--accent) 30%, var(--line));
}

body:not(.tiled) > details > summary
{
    padding: 0.8rem 0;
    font-weight: 600;
    cursor: pointer;
}

.head { margin: 0.8rem 0 0.3rem; font-size: 1em; font-weight: 600; }

body:not(.tiled) .status { display: none; }

/* An editor as tall as its file, up to a point: the gutter is in the
   flow and the text box is laid over it, so the gutter sets the height. */
body:not(.tiled) .editor { height: auto; min-height: 8em; max-height: 28em; }

/* A phone, tiled because somebody asked (`?touch'): no chords to hint
   at, a header on one row, and text at a size Safari will not zoom in
   on when an editor is focused. */
html.touch .status .hint { display: none; }

@media (pointer: coarse)
{
    .editor { font-size: 16px; }
}

html.touch body.tiled .bar { flex-wrap: nowrap; padding: 0.4em 0.7em; }
html.touch body.tiled .what,
html.touch body.tiled .bar > .to-plain,
html.touch body.tiled .to-github { display: none; }

/* The menu, which only a phone asked to tile has: its button at the end
   of the header, and the menu dropped from it, over the layout rather
   than pushing it down. */
.menu-button { display: none; }

html.touch body.tiled .bar { position: relative; }

html.touch body.tiled .menu-button
{
    display: flex;
    align-items: center;
    gap: 0.3em;
    padding: 0.1em 0.55em;
    font-size: 1.05em;
    background: transparent;
    border: 1px solid var(--line);
    border-radius: 6px;
}

.menu-count
{
    min-width: 1.4em;
    padding: 0 0.35em;
    font-size: 0.7em;
    font-weight: 650;
    line-height: 1.5;
    color: var(--on-accent);
    background: var(--accent);
    border-radius: 1em;
}

.menu-count[hidden] { display: none; }

.menu
{
    position: absolute;
    top: calc(100% + 4px);
    right: 0.5em;
    z-index: 5;
    display: flex;
    flex-direction: column;
    gap: 0.2em;
    min-width: 13em;
    padding: 0.5em;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 10px;
    box-shadow: 0 8px 24px rgb(0 0 0 / 0.18);
}

.menu[hidden], body:not(.tiled) .menu { display: none; }

.menu > a
{
    padding: 0.45em 0.6em;
    color: var(--text);
    text-decoration: none;
    border-radius: 6px;
}

.menu > a:hover { background: var(--surface-2); }

/* mullion's list of closed panes, drawn in the menu: a column of them,
   under a line that says what they are. */
#menu-panes .panedrawer
{
    flex-direction: column;
    align-items: stretch;
    gap: 0.2em;
    margin: 0 0 0.3em;
    padding-bottom: 0.4em;
    border-bottom: 1px solid var(--line);
}

#menu-panes .panedrawerlabel
{
    align-self: flex-start;
    padding: 0.2em 0.6em;
    font-size: 0.8em;
}

#menu-panes .paneclosed
{
    padding: 0.45em 0.6em;
    font-size: 1em;
    text-align: left;
    border-style: solid;
    border-radius: 6px;
}
html.touch body.tiled .bar { gap: 0.6em; }
html.touch body.tiled .panesroot { margin: 0.35em; }
html.touch body.tiled .status { gap: 0.9em; padding: 0.25em 0.7em; }
html.touch body.tiled #st-activity { display: none; }

@media (max-width: 40em)
{
    .bar { flex-wrap: wrap; row-gap: 0.3em; }
    body:not(.tiled) > section,
    body:not(.tiled) > details,
    .plain-note { margin: 0.7rem 0.5rem; }
    .editor { height: 16em; }
    #frame { height: 20em; }
}

/*
 * ---- tiled ----
 *
 * The header and the status bar keep their height; the layout takes the
 * rest. Inside a pane, the box that wants the room takes it, and the
 * toolbars around it keep theirs.
 */

body.tiled { padding: 0; }

body.tiled .panesroot { margin: 0.5em 0.6em; }

body.tiled .pane { border-radius: 8px; }

body.tiled .panebody > section > .head { display: none; }

body.tiled .panebody { padding: 0 0.7em 0.7em; }

body.tiled .panebody:has(> section > .editor) { padding: 0; }

body.tiled .editor,
body.tiled #frame,
body.tiled .log,
body.tiled .chart
{
    flex: 1 1 0;
    height: auto;
    min-height: 0;
    max-height: none;
}

body.tiled .editor { border: 0; border-radius: 0; }

body.tiled .chart { min-height: 5em; }

body.tiled .tools,
body.tiled .aside,
body.tiled .onscreen { flex: 0 0 auto; }

body.tiled .panedrawer { margin-bottom: 0.5em; }