/* Interactive viewports ("lab"). Loaded only on pages with `lab: true`. */

.lab-viewport {
    margin: 1.5rem 0;
    padding: 0;
}

.lab-stage {
    position: relative;
    height: var(--lab-height, 420px);
    border: 1px solid #c8ccd2;
    border-radius: 6px;
    overflow: hidden;
    background: #e9edf2;
}

.lab-stage canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    display: block;
    outline: none;
}

/* A centered pill, readable on top of the empty stage as well as over a rendered scene. */
.lab-status {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: max-content;
    max-width: calc(100% - 2rem);
    padding: 0.5rem 0.9rem;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.92);
    box-shadow: 0 1px 6px rgba(0, 0, 0, 0.18);
    text-align: center;
    color: #334;
    font-size: 0.9rem;
    pointer-events: none;
}

.lab-status[hidden] {
    display: none;
}

.lab-params {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.5rem;
    padding: 0.6rem 0.2rem 0;
    font-size: 0.85rem;
}

.lab-param {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin: 0;
}

.lab-param input[type=range] {
    width: 9rem;
}

.lab-param-value {
    min-width: 3.2em;
    font-variant-numeric: tabular-nums;
    color: #556;
}

.lab-caption {
    margin-top: 0.4rem;
    font-size: 0.85rem;
    color: #667;
}

/* Code listing */

.lab-code {
    margin-top: 0.8rem;
    font-size: 0.85rem;
}

/* One listing per snippet. */
.lab-snippet + .lab-snippet {
    margin-top: 1rem;
}

.lab-snippet-error {
    margin: 0;
    padding: 0.5rem 0.8rem;
    border: 1px solid #f0b4b0;
    border-radius: 6px;
    background: #fdf0ef;
    color: #8a2b25;
}

.lab-code summary {
    cursor: pointer;
    font-weight: 600;
    margin-bottom: 0.3rem;
}

.lab-code-toggle {
    display: block;
    margin-bottom: 0.4rem;
    color: #556;
}

.lab-code pre {
    margin: 0;
    padding: 0.6rem 0;
    overflow-x: auto;
    background: #f6f7f9;
    border: 1px solid #dde0e5;
    border-radius: 6px;
    line-height: 1.45;
}

.lab-code code {
    display: block;
    width: max-content;
    min-width: 100%;
    font-size: 0.82rem;
}

.lab-line {
    display: block;
    padding: 0 0.8rem;
    white-space: pre;
}

.lab-line-add {
    background: rgba(46, 160, 67, 0.18);
    box-shadow: inset 3px 0 0 #2ea043;
}

.lab-line-del {
    background: rgba(248, 81, 73, 0.14);
    box-shadow: inset 3px 0 0 #f85149;
    color: #8a4b48;
    text-decoration: line-through;
    text-decoration-color: rgba(248, 81, 73, 0.5);
}

.tok-comment { color: #6a737d; font-style: italic; }
.tok-keyword { color: #cf222e; }
.tok-type    { color: #0550ae; }
.tok-builtin { color: #8250df; }
.tok-number  { color: #0a7a4b; }
.tok-string  { color: #0a3069; }

@media (prefers-color-scheme: dark) {
    /* The rest of the site is light-only for now; keep the lab consistent with it. */
}