.section-um2-signal-grid .um2-signal-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--spacing-3x, 20px);
}

.section-um2-signal-grid .um2-signal-grid__card {
    padding: var(--spacing-5x, 32px) var(--spacing-4x, 24px);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-2x, 14px);
    min-height: 220px;
}

.section-um2-signal-grid .um2-signal-grid__pulse {
    position: relative;
    width: 72px;
    height: 72px;
    margin-bottom: var(--spacing-1x, 6px);
}

.section-um2-signal-grid .um2-signal-grid__ring {
    position: absolute;
    inset: 0;
    border-radius: 50%;
    border: 2px solid var(--brand-primary-lighter-2, #f7d4d4);
    animation: um2-signal-ping 2.6s ease-out infinite;
}

.section-um2-signal-grid .um2-signal-grid__core {
    position: absolute;
    inset: 10px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--brand-primary-lighter-3, #fae1e2);
    color: var(--brand-primary, #d50c0c);
    font-size: 24px;
}

@keyframes um2-signal-ping {
    0% { transform: scale(0.96); opacity: 1; }
    70% { transform: scale(1.12); opacity: 0; }
    100% { transform: scale(1.12); opacity: 0; }
}

.section-um2-signal-grid .um2-signal-grid__title {
    margin: 0;
    font-size: var(--font-size-md, 16px);
    font-weight: 700;
}

.section-um2-signal-grid .um2-signal-grid__desc {
    margin: 0;
    font-size: var(--font-size-sm, 14px);
    color: var(--text-faded-color);
    line-height: 1.55;
    flex: 1;
}

.section-um2-signal-grid .um2-signal-grid__latency {
    margin-top: auto;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--brand-success-darker, #15803d);
    padding: 4px 10px;
    border-radius: 999px;
    background: var(--brand-success-lighter-4, #f0faf3);
    border: 1px solid var(--brand-success-lighter-2, #c6ebcf);
}

@media (max-width: 991px) {
    .section-um2-signal-grid .um2-signal-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 575px) {
    .section-um2-signal-grid .um2-signal-grid {
        grid-template-columns: 1fr;
    }
}

@media (prefers-reduced-motion: reduce) {
    .section-um2-signal-grid .um2-signal-grid__ring {
        animation: none;
        opacity: 0.45;
    }
}