.lab-shell {
    display: grid;
    grid-template-columns: 250px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
}

.lab-sidebar {
    position: sticky;
    top: 92px;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
    scrollbar-width: thin;
}

.lab-main {
    min-width: 0;
}

.lab-nav-list {
    border-top: 1px solid var(--rule);
}

.lab-nav-button {
    width: 100%;

    display: grid;
    grid-template-columns: 30px 1fr;
    gap: 7px;

    padding: 11px 7px;

    border: 0;
    border-bottom: 1px solid var(--rule);

    background: transparent;
    color: var(--ink);

    text-align: left;

    cursor: pointer;
}

.lab-nav-button:hover {
    background: var(--paper-deep);
}

.lab-nav-button.active {
    background: var(--accent-soft);
}

.lab-nav-index {
    padding-top: 2px;

    font-family: var(--mono);
    font-size: 9px;
    color: var(--ink-faint);
}

.lab-nav-title {
    display: block;

    font-size: 12px;
    line-height: 1.3;
    font-weight: 550;
}

.lab-nav-subtitle {
    display: block;

    margin-top: 3px;

    font-family: var(--mono);
    font-size: 8px;
    line-height: 1.35;
    color: var(--ink-faint);
}

.lab-experiment {
    display: block;

    border-top: 1px solid var(--ink);
    padding-top: 16px;
}

.lab-experiment-kicker {
    font-family: var(--mono);
    font-size: 9px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--ink-faint);
}

.lab-experiment h3 {
    max-width: 760px;

    margin-top: 7px;

    font-size: 31px;
    line-height: 1.12;
    letter-spacing: -0.038em;
    font-weight: 550;
}

.lab-experiment-summary {
    max-width: 730px;

    margin-top: 18px;

    color: var(--ink-soft);
    font-size: 14px;
    line-height: 1.7;
}

.lab-formula {
    max-width: 100%;
    overflow-x: auto;

    margin-top: 20px;
    padding: 14px 17px;

    border-left: 2px solid var(--rule-dark);

    background: var(--paper-deep);

    font-size: 13px;
}

.lab-body {
    margin-top: 27px;
}

.lab-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;

    margin-bottom: 17px;
}

.lab-control {
    flex: 1 1 220px;

    display: grid;
    grid-template-columns: auto minmax(80px, 1fr) 48px;
    align-items: center;
    gap: 10px;

    min-height: 42px;
    padding: 8px 11px;

    border: 1px solid var(--rule);

    background: var(--paper-raised);
}

.lab-control span {
    font-family: var(--mono);
    font-size: 8px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--ink-soft);
}

.lab-control output {
    text-align: right;

    font-family: var(--mono);
    font-size: 11px;
}

.lab-control input[type="range"] {
    width: 100%;

    appearance: none;

    height: 2px;

    border: 0;

    background: var(--rule-dark);
}

.lab-control input[type="range"]::-webkit-slider-thumb {
    appearance: none;

    width: 14px;
    height: 14px;

    border: 1px solid var(--accent-dark);
    border-radius: 50%;

    background: var(--accent);
    cursor: pointer;
}

.lab-control input[type="range"]::-moz-range-thumb {
    width: 14px;
    height: 14px;

    border: 1px solid var(--accent-dark);
    border-radius: 50%;

    background: var(--accent);
    cursor: pointer;
}

.lab-button {
    min-height: 42px;

    padding: 0 13px;

    border: 1px solid var(--rule-dark);

    background: transparent;

    font-family: var(--mono);
    font-size: 8px;
    text-transform: uppercase;
    letter-spacing: 0.06em;

    cursor: pointer;
}

.lab-button:hover {
    background: var(--paper-deep);
}

.lab-button.primary {
    background: var(--accent);
    border-color: var(--accent-dark);
}

.lab-segment {
    display: flex;
    flex: 1 1 100%;

    border: 1px solid var(--rule);

    background: var(--paper-raised);
}

.lab-segment-button {
    flex: 1 1 0;

    min-height: 38px;
    padding: 0 11px;

    border: 0;
    border-right: 1px solid var(--rule);

    background: transparent;

    font-family: var(--mono);
    font-size: 8px;
    text-transform: uppercase;
    letter-spacing: 0.06em;

    cursor: pointer;
}

.lab-segment-button:last-child {
    border-right: 0;
}

.lab-segment-button:hover {
    background: var(--paper-deep);
}

.lab-segment-button.active {
    background: var(--accent);
    color: var(--ink);
}

.pde-equation {
    flex: 1 1 100%;

    margin-top: 0;
    padding-block: 11px;

    font-size: 12px;
}

.pde-equation .katex-display {
    margin: 0;
}
.lab-canvas {
    display: block;

    width: 100%;
    height: auto;

    aspect-ratio: 760 / 420;

    border: 1px solid var(--rule);

    background: var(--paper-raised);
}

#pde-canvas {
    aspect-ratio: 760 / 560;
}

.lab-canvas.interactive {
    cursor: crosshair;
}


.lab-metrics {
    display: grid;
    grid-template-columns: repeat(3, 1fr);

    margin-top: 12px;

    border-top: 1px solid var(--rule);
    border-bottom: 1px solid var(--rule);
}

.lab-metric {
    padding: 13px;
}

.lab-metric + .lab-metric {
    border-left: 1px solid var(--rule);
}

.lab-metric span {
    display: block;

    margin-bottom: 4px;

    font-family: var(--mono);
    font-size: 8px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--ink-faint);
}

.lab-metric strong {
    font-family: var(--mono);
    font-size: 15px;
    font-weight: 500;
}

.lab-result {
    margin-top: 21px;

    display: grid;
    grid-template-columns: 115px 1fr;
    gap: 18px;

    padding: 15px 17px;

    border-left: 2px solid var(--accent-dark);

    background: var(--accent-soft);
}

.lab-result-label {
    font-family: var(--mono);
    font-size: 8px;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: var(--accent-dark);
}

.lab-result p {
    font-size: 12px;
    line-height: 1.65;
    color: var(--ink-soft);
}

.lab-implication {
    margin-top: 20px;

    padding-top: 15px;

    border-top: 1px solid var(--rule);
}

.lab-implication span {
    font-family: var(--mono);
    font-size: 8px;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: var(--ink-faint);
}

.lab-implication p {
    max-width: 720px;

    margin-top: 7px;

    color: var(--ink-soft);
    font-size: 13px;
}
.lab-table {
    width: 100%;

    margin-top: 15px;

    border-collapse: collapse;

    font-size: 11px;
}

.lab-table th,
.lab-table td {
    padding: 8px 10px;

    border-bottom: 1px solid var(--rule);

    text-align: right;
}

.lab-table th:first-child,
.lab-table td:first-child {
    text-align: left;
}

.lab-table th {
    font-family: var(--mono);
    font-size: 8px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--ink-faint);
}


/* media qries */
@media (max-width: 900px) {

    .lab-shell {
        grid-template-columns: 1fr;
        gap: 35px;
    }

    .lab-sidebar {
        position: static;

        max-height: none;
        overflow: visible;
    }

    .lab-nav-list {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
    }

}


@media (max-width: 620px) {

    .lab-nav-list {
        grid-template-columns: 1fr;
    }

    .lab-metrics {
        grid-template-columns: 1fr;
    }

    .lab-metric + .lab-metric {
        border-left: 0;
        border-top: 1px solid var(--rule);
    }

    .lab-result {
        grid-template-columns: 1fr;
        gap: 5px;
    }

}