.principle-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.8em;
}

.principle-card {
    border: 2px solid var(--rlab-color-border);
    border-radius: var(--rlab-radius-md);
    padding: 0.8em;
    text-align: center;
}

.pc-number {
    font-size: 1.4em;
    font-weight: 700;
    color: var(--rlab-color-accent);
    display: block;
}

.pc-title {
    font-weight: 700;
    font-size: 0.85em;
    display: block;
    margin-top: 0.2em;
}

.pc-sub {
    font-size: 0.7em;
    color: var(--rlab-color-muted);
    display: block;
    margin-top: 0.2em;
}