/* Sipar playground. No framework, no web fonts: the page itself is a handful of small files of ours. */
:root {
    color-scheme: dark;
    --bg: #0b0f14;
    --panel: #121821;
    --code: #0d1219;
    --line: #2a3646;
    --fg: #e6edf3;
    --muted: #a3b1bf;
    --accent: #3dd6c6;
    --on-accent: #06211e;
    --focus: #8be9de;
    --held: #4ade80;
    --held-bg: #0f2a1c;
    --broken: #ff8a80;
    --broken-bg: #36151a;
    --limit: #f5c451;
    --limit-bg: #33280d;
    --off: #a3b1bf;
    --off-bg: #1a222d;
    --kw: #7cc4ff;
    --str: #a8e0a0;
    --com: #94a3b3;
    --num: #f5c451;
    --ty: #d7b3ff;
    --dec: #ffb070;
    --ip: #5fe0d2;
    --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
    --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: light) {
    :root {
        color-scheme: light;
        --bg: #f4f6f8;
        --panel: #ffffff;
        --code: #fbfcfd;
        --line: #c9d2dc;
        --fg: #18202b;
        --muted: #4d5a68;
        --accent: #0a7468;
        --on-accent: #ffffff;
        --focus: #0a7468;
        --held: #0f6a37;
        --held-bg: #e3f6ea;
        --broken: #a8231c;
        --broken-bg: #fdebe9;
        --limit: #7a4f00;
        --limit-bg: #fdf3d8;
        --off: #4d5a68;
        --off-bg: #eef1f4;
        --kw: #0550ae;
        --str: #0a6233;
        --com: #5b6772;
        --num: #7a4f00;
        --ty: #6b3fb8;
        --dec: #8f3a00;
        --ip: #0a7468;
    }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--fg);
    font: 16px/1.55 var(--sans);
}

a { color: var(--accent); }
a:hover { text-decoration-thickness: 2px; }

:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }

code, kbd, pre, textarea { font-family: var(--mono); }

.top, main, .foot {
    max-width: 1320px;
    margin: 0 auto;
    padding: 0 20px;
}

.top {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px 24px;
    padding-top: 18px;
    padding-bottom: 14px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    color: var(--fg);
    text-decoration: none;
}
.brand .mark { width: 26px; height: 26px; fill: var(--accent); }
.brand .name { font-size: 22px; font-weight: 700; letter-spacing: 0.01em; }
.brand .where { color: var(--muted); font-size: 15px; }

.tagline { flex: 1 1 380px; margin: 0; color: var(--muted); font-size: 15px; }

.links { display: flex; gap: 18px; font-size: 15px; }
.links a { padding: 6px 0; }

.scenarios {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 6px 0 2px;
}

.scenarios button, .filetabs button {
    font: inherit;
    color: var(--muted);
    background: transparent;
    border: 1px solid var(--line);
    border-radius: 999px;
    padding: 7px 15px;
    min-height: 40px;
    cursor: pointer;
}
.scenarios button:hover, .filetabs button:hover { color: var(--fg); border-color: var(--muted); }
.scenarios button[aria-selected="true"] {
    color: var(--on-accent);
    background: var(--accent);
    border-color: var(--accent);
    font-weight: 600;
}

.brief { padding: 14px 0 6px; }
.kind {
    margin: 0;
    color: var(--muted);
    font-size: 13px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}
.brief h1 { margin: 2px 0 6px; font-size: 26px; line-height: 1.25; }
.goal { margin: 0 0 8px; font-size: 17px; }
.notes { margin: 0; padding-left: 20px; color: var(--muted); font-size: 15px; }
.notes li { margin: 2px 0; }
.goal code, .notes code, .verdict code { font-size: 0.92em; }

.work {
    display: grid;
    grid-template-columns: minmax(0, 11fr) minmax(0, 9fr);
    gap: 18px;
    padding: 14px 0 26px;
    align-items: start;
}

.pane {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 14px;
    min-width: 0;
}

.filetabs { display: flex; flex-wrap: wrap; gap: 6px; }
.filetabs button {
    border-radius: 8px;
    padding: 5px 11px;
    min-height: 36px;
    font-family: var(--mono);
    font-size: 14px;
}
.filetabs button[aria-selected="true"] { color: var(--fg); border-color: var(--accent); background: var(--code); }
.filetabs .tag { margin-left: 7px; font-family: var(--sans); font-size: 12px; color: var(--muted); }
.filetabs .edited { color: var(--limit); }

.filemeta { margin: 8px 0; min-height: 1.5em; color: var(--muted); font-size: 14px; }

.editor {
    position: relative;
    height: min(62vh, 560px);
    min-height: 260px;
    background: var(--code);
    border: 1px solid var(--line);
    border-radius: 8px;
    overflow: hidden;
}
.editor:focus-within { border-color: var(--focus); }

.editor .hl, .editor textarea {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    margin: 0;
    border: 0;
    padding: 12px 14px;
    font-size: 14px;
    line-height: 1.5;
    letter-spacing: 0;
    tab-size: 4;
    white-space: pre;
    overflow-wrap: normal;
    word-break: normal;
}
.editor .hl { overflow: hidden; pointer-events: none; color: var(--fg); }
.editor .hl code { display: block; width: max-content; min-width: 100%; will-change: transform; }
.editor textarea {
    display: block;
    resize: none;
    overflow: auto;
    background: transparent;
    color: transparent;
    caret-color: var(--fg);
    outline: none;
}
.editor textarea::selection { background: color-mix(in srgb, var(--accent) 35%, transparent); color: transparent; }
.editor textarea[readonly] { caret-color: transparent; }

/* no highlighting: the textarea shows its own text (unknown file type, or the self-check failed) */
.editor.plain .hl { display: none; }
.editor.plain textarea { color: var(--fg); }
.editor.plain textarea::selection { color: var(--fg); }

.t-kw { color: var(--kw); }
.t-str { color: var(--str); }
.t-com { color: var(--com); }
.t-num { color: var(--num); }
.t-ty { color: var(--ty); }
.t-dec { color: var(--dec); }
.t-ip { color: var(--ip); }
.t-key { color: var(--kw); }

.actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px 10px;
    margin-bottom: 12px;
}
.actions button {
    font: inherit;
    font-weight: 600;
    min-height: 44px;
    padding: 8px 16px;
    border-radius: 8px;
    border: 1px solid var(--line);
    background: transparent;
    color: var(--fg);
    cursor: pointer;
}
.actions button:hover { border-color: var(--muted); }
.actions button.primary { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.actions button.primary:hover { filter: brightness(1.08); }
.actions button:disabled { opacity: 0.6; cursor: default; }
.actions kbd {
    margin-left: 6px;
    font-size: 12px;
    font-weight: 400;
    padding: 1px 5px;
    border: 1px solid currentColor;
    border-radius: 4px;
    opacity: 0.85;
}
.status { color: var(--muted); font-size: 14px; }
.status.busy::after { content: "…"; animation: blink 1.2s steps(2, start) infinite; }
@keyframes blink { 50% { opacity: 0.2; } }
@media (prefers-reduced-motion: reduce) { .status.busy::after { animation: none; } }

.result h2 {
    margin: 16px 0 6px;
    font-size: 13px;
    color: var(--muted);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}
.result.stale .out, .result.stale .events, .result.stale .verdict { opacity: 0.55; }

.verdict {
    border: 1px solid var(--off);
    border-left-width: 6px;
    border-radius: 8px;
    padding: 10px 14px;
    background: var(--off-bg);
    color: var(--fg);
}
.verdict strong { display: block; font-size: 19px; color: var(--off); }
.verdict p { margin: 2px 0 0; font-size: 15px; overflow-wrap: anywhere; }
.verdict.held { border-color: var(--held); background: var(--held-bg); }
.verdict.held strong { color: var(--held); }
.verdict.broken { border-color: var(--broken); background: var(--broken-bg); }
.verdict.broken strong { color: var(--broken); }
.verdict.limit { border-color: var(--limit); background: var(--limit-bg); }
.verdict.limit strong { color: var(--limit); }

.out {
    margin: 0;
    padding: 10px 12px;
    max-height: 300px;
    overflow: auto;
    background: var(--code);
    border: 1px solid var(--line);
    border-radius: 8px;
    font-size: 13.5px;
    line-height: 1.5;
    white-space: pre-wrap;
    overflow-wrap: anywhere;
}
.out.err { margin-top: 8px; border-color: var(--broken); }
.runmeta { margin: 6px 0 0; min-height: 1.4em; color: var(--muted); font-size: 13px; }

.events { display: grid; gap: 8px; }
.events .none { margin: 0; color: var(--muted); font-size: 15px; }
.event {
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 8px 12px;
    background: var(--code);
}
.event .what { margin: 0 0 4px; font-size: 13px; color: var(--muted); }
.event pre {
    margin: 0;
    font-size: 13.5px;
    line-height: 1.5;
    white-space: pre-wrap;
    overflow-wrap: anywhere;
}

.journal { margin-top: 16px; }
.journal summary { cursor: pointer; color: var(--muted); font-size: 15px; padding: 6px 0; }
.journal summary:hover { color: var(--fg); }

.foot {
    padding-top: 6px;
    padding-bottom: 36px;
    color: var(--muted);
    font-size: 14.5px;
}
.foot p { margin: 0 0 8px; max-width: 100ch; }
.foot strong { color: var(--fg); }
.foot code { font-size: 13.5px; }
.build { font-size: 13px; }
.noscript { max-width: 1320px; margin: 0 auto; padding: 0 20px 30px; }
.offscreen { position: fixed; left: -9999px; top: 0; opacity: 0; }

@media (max-width: 920px) {
    .work { grid-template-columns: minmax(0, 1fr); }
    .editor { height: 46vh; min-height: 240px; }
    .brief h1 { font-size: 22px; }
    .top, main, .foot { padding-left: 14px; padding-right: 14px; }
    .tagline { flex-basis: 100%; order: 3; }
    .actions kbd { display: none; }
}