:root {
    --bg: #f7f7f5;
    --panel: #ffffff;
    --border: #e3e2de;
    --text: #1f1f1d;
    --dim: #6b6a65;
    --accent: #3b6fd8;
    --error: #c4352b;
    --warn: #b7791f;
    --ok: #2f855a;
    --mark-error: rgba(196, 53, 43, 0.12);
    --mark-warn: rgba(183, 121, 31, 0.12);
    --t-keyword: #8a3ab9;
    --t-string: #2f7d32;
    --t-number: #b35c00;
    --t-comment: #8d8b84;
    --t-type: #1f6fb2;
    --t-attr: #a83279;
    --t-punct: #55534e;
    --mono: ui-monospace, "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, monospace;
    --sans: system-ui, -apple-system, "Segoe UI", sans-serif;
    color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #17181b;
        --panel: #1e2024;
        --border: #2d3036;
        --text: #e4e3df;
        --dim: #9a9890;
        --accent: #6e9bf5;
        --error: #f0776c;
        --warn: #e8b04f;
        --ok: #6fcf97;
        --mark-error: rgba(240, 119, 108, 0.16);
        --mark-warn: rgba(232, 176, 79, 0.14);
        --t-keyword: #c792ea;
        --t-string: #a5d6a7;
        --t-number: #f7a46b;
        --t-comment: #6f7480;
        --t-type: #82b1ff;
        --t-attr: #f48fb1;
        --t-punct: #b0aea7;
    }
}

* { box-sizing: border-box; }

html, body { height: 100%; margin: 0; }

body {
    background: var(--bg);
    color: var(--text);
    font: 14px/1.4 var(--sans);
    display: flex;
    flex-direction: column;
}

.bar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 16px;
    border-bottom: 1px solid var(--border);
    background: var(--panel);
    flex-wrap: wrap;
}

.brand { font-weight: 600; color: var(--text); text-decoration: none; }
.sep { color: var(--dim); }
.title { margin-right: auto; }
.status { color: var(--dim); font-size: 13px; min-width: 120px; }
.status.error { color: var(--error); }

select, input, button {
    font: inherit;
    color: inherit;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 4px 8px;
}

.frames input { width: 72px; margin-left: 4px; }

button#run {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
    cursor: pointer;
}

button#run:disabled { opacity: 0.5; cursor: default; }
kbd { font: 11px var(--mono); opacity: 0.75; margin-left: 4px; }

.layout {
    flex: 1;
    display: grid;
    grid-template-columns: minmax(0, 3fr) minmax(280px, 2fr);
    min-height: 0;
}

.editor { position: relative; min-height: 0; border-right: 1px solid var(--border); }

.loader {
    position: absolute;
    inset: 0;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    background: var(--bg);
    transition: opacity 0.2s;
}

.loader.done { opacity: 0; pointer-events: none; }
.loader-title { font-size: 15px; }
.loader-detail { color: var(--dim); font-size: 13px; min-height: 18px; font-variant-numeric: tabular-nums; }
.loader.failed .loader-title { color: var(--error); }
.loader.failed .spinner, .loader.failed .progress { display: none; }

.spinner {
    width: 28px;
    height: 28px;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.progress {
    position: relative;
    width: 220px;
    height: 4px;
    overflow: hidden;
    background: var(--border);
    border-radius: 2px;
}

.progress-bar {
    height: 100%;
    width: 0;
    background: var(--accent);
    border-radius: 2px;
    transition: width 0.15s;
}

.progress-bar.indeterminate {
    position: absolute;
    width: 35%;
    animation: slide 1.1s ease-in-out infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }
@keyframes slide { from { left: -35%; } to { left: 100%; } }

@media (prefers-reduced-motion: reduce) {
    .spinner, .progress-bar.indeterminate { animation-duration: 3s; }
}

.code {
    position: relative;
    height: 100%;
    overflow: hidden;
    font: 14px/21px var(--mono);
    tab-size: 4;
}

.code textarea, .code pre, .code .marks {
    position: absolute;
    inset: 0;
    margin: 0;
    padding: 12px 16px;
    border: 0;
    font: inherit;
    white-space: pre;
    overflow: auto;
}

.code textarea {
    resize: none;
    background: transparent;
    color: transparent;
    caret-color: var(--text);
    outline: none;
}

.code pre { pointer-events: none; color: var(--text); }
.code .marks { pointer-events: none; overflow: hidden; }
.mark { position: absolute; left: 0; right: 0; height: 21px; }
.mark.error { background: var(--mark-error); }
.mark.warning { background: var(--mark-warn); }

.t-keyword { color: var(--t-keyword); }
.t-string { color: var(--t-string); }
.t-number { color: var(--t-number); }
.t-comment { color: var(--t-comment); font-style: italic; }
.t-type { color: var(--t-type); }
.t-attr { color: var(--t-attr); }
.t-punct { color: var(--t-punct); }

.side { display: flex; flex-direction: column; min-height: 0; background: var(--panel); }
.pane { padding: 8px 0; border-bottom: 1px solid var(--border); max-height: 40%; display: flex; flex-direction: column; min-height: 0; }
.pane.grow { flex: 1; max-height: none; border-bottom: 0; }

h2 {
    margin: 0;
    padding: 0 16px 6px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--dim);
    display: flex;
    align-items: center;
    gap: 8px;
}

.count { font-weight: 400; }
.link { border: 0; background: none; color: var(--accent); padding: 0; cursor: pointer; font-size: 12px; text-transform: none; letter-spacing: 0; }

.list { list-style: none; margin: 0; padding: 0; overflow: auto; min-height: 0; }
.list li { padding: 3px 16px; border-left: 3px solid transparent; white-space: pre-wrap; word-break: break-word; }
.list li.clickable { cursor: pointer; }
.list li.clickable:hover { background: var(--bg); }
.list li.error { border-left-color: var(--error); }
.list li.warning { border-left-color: var(--warn); }
.list li.fault { color: var(--error); }
.list li.done { color: var(--ok); }
.list .where { color: var(--dim); margin-right: 6px; }
.list .code-id { color: var(--dim); margin-right: 6px; font-family: var(--mono); font-size: 12px; }
.mono { font: 13px/1.5 var(--mono); }
.list .level { display: inline-block; width: 44px; color: var(--dim); }
.list .level.ERROR { color: var(--error); }
.list .level.WARN { color: var(--warn); }

@media (max-width: 760px) {
    .layout { grid-template-columns: 1fr; grid-template-rows: minmax(300px, 1fr) auto; }
    .editor { border-right: 0; border-bottom: 1px solid var(--border); }
    .pane { max-height: 240px; }
}