.lab-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.55fr) minmax(260px, 0.8fr);
    gap: 20px;
    align-items: start;
}

.lab-card {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0.015));
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    padding: 24px;
}

.zipper-stage {
    padding: 16px;
}

#zipperCanvas {
    display: block;
    width: 100%;
    height: auto;
    aspect-ratio: 2.35 / 1;
    background: #0c1410;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.legend {
    display: flex;
    flex-wrap: wrap;
    gap: 14px 18px;
    margin-top: 12px;
    color: var(--text-muted);
    font-size: 0.82rem;
}

.legend span {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.swatch {
    display: inline-block;
    width: 18px;
    height: 10px;
    border-radius: 2px;
}

.swatch.car {
    background: #818cf8;
}

.swatch.truck {
    width: 34px;
    background: linear-gradient(90deg, #f59e0b 28%, #e7e5e4 28%);
}

.swatch.lane {
    background: #3f3f46;
    box-shadow: inset 0 -2px 0 #f8fafc;
}

.status-line {
    font-size: clamp(1.35rem, 3vw, 1.85rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    margin: 8px 0 16px;
}

.status-line.ok {
    color: #86efac;
}

.status-line.jam {
    color: #f87171;
}

.status-line.run {
    color: var(--text-main);
}

.result-list {
    display: grid;
    gap: 12px;
}

.result-list div {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
}

.result-list dt {
    color: var(--text-muted);
}

.result-list dd {
    font-weight: 600;
}

.controls-form {
    display: grid;
    gap: 16px;
    margin-top: 18px;
}

.control-label {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 6px;
    gap: 12px;
}

.control-label label {
    font-size: 0.78rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-muted);
    font-weight: 600;
}

.control-label span {
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

.control input[type="range"] {
    width: 100%;
    accent-color: var(--accent);
}

.control-hint {
    margin-top: 4px;
    color: var(--text-muted);
    font-size: 0.8rem;
}

.preset-row {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.preset-row button,
.action-row button {
    border: 1px solid var(--border-color);
    background: var(--bg-surface);
    color: var(--text-muted);
    border-radius: var(--radius-md);
    padding: 8px 12px;
    cursor: pointer;
    font-weight: 600;
    font-family: inherit;
}

.preset-row button:hover,
.action-row button:hover {
    color: var(--text-main);
    border-color: var(--border-strong);
}

.action-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.action-row .primary {
    color: var(--text-main);
    border-color: var(--accent);
    background: var(--accent-soft);
}

.hint {
    margin-top: 16px;
    color: var(--text-muted);
    line-height: 1.5;
    font-size: 0.92rem;
}

@media (max-width: 900px) {
    .lab-layout {
        grid-template-columns: 1fr;
    }

    #zipperCanvas {
        aspect-ratio: 1.7 / 1;
    }
}