.lab-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(240px, 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;
}

.band-toggle {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
}

.band-toggle button {
    border: 1px solid var(--border-color);
    background: var(--bg-surface);
    color: var(--text-muted);
    border-radius: var(--radius-md);
    padding: 8px 14px;
    cursor: pointer;
    font-weight: 600;
}

.band-toggle button.active {
    color: var(--text-main);
    border-color: var(--accent);
    background: var(--accent-soft);
}

.resistor-svg {
    width: 100%;
    max-width: 520px;
    display: block;
    margin: 0 auto 24px;
}

.band-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px;
}

.band-field label {
    display: block;
    font-size: 0.78rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 6px;
    font-weight: 600;
}

.band-field select {
    width: 100%;
    background: rgba(10, 10, 12, 0.9);
    color: var(--text-main);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 10px 12px;
}

.result-card .ohms {
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    margin: 8px 0 16px;
}

.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;
}

.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;
    }
}