/* Newborn prevalence — healthy vs NICU switch + dots field */
.nb-prev {
    position: relative;
    overflow: clip;
    background:
        radial-gradient(ellipse 70% 55% at 0% 100%, color-mix(in srgb, var(--brand-100, #d6f0e5) 65%, transparent), transparent 55%),
        radial-gradient(ellipse 50% 40% at 100% 0%, color-mix(in srgb, var(--brand-50, #eef8f3) 80%, transparent), transparent 50%),
        linear-gradient(180deg, color-mix(in srgb, var(--brand-50, #eef8f3) 70%, var(--surface, #fff)) 0%, var(--surface, #fff) 100%);
}

.nb-prev__inner {
    width: 100%;
    max-width: 52rem;
    margin-inline: auto;
}

.nb-prev__header {
    text-align: center;
    margin-block-end: var(--space-5, 1.5rem);
}

.nb-prev__eyebrow {
    margin: 0 0 var(--space-2, 0.5rem);
    font-size: var(--fs-sm, 0.875rem);
    font-weight: var(--fw-semibold, 600);
    letter-spacing: 0.04em;
    color: var(--brand-600, #0f7050);
}

.nb-prev__title {
    margin: 0 0 var(--space-3, 0.75rem);
    font-size: clamp(1.4rem, 3vw, 1.95rem);
    font-weight: var(--fw-black, 800);
    color: var(--brand-900, #063d2b);
    line-height: var(--lh-tight, 1.25);
}

.nb-prev__lead {
    margin: 0 auto;
    max-width: 34rem;
    color: var(--text-muted, #4a6358);
    font-size: var(--fs-md, 1rem);
    line-height: var(--lh-relaxed, 1.7);
}

.nb-prev__switch {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.35rem;
    max-width: 26rem;
    margin: 0 auto var(--space-5, 1.5rem);
    padding: 0.3rem;
    border-radius: 999px;
    background: color-mix(in srgb, var(--brand-50, #eef8f3) 80%, var(--surface, #fff));
    border: 1px solid color-mix(in srgb, var(--brand-200, #a7ddc8) 60%, var(--border, #c5d4cc));
}

.nb-prev__switch-btn {
    appearance: none;
    border: 0;
    background: transparent;
    color: var(--brand-800, #084c36);
    border-radius: 999px;
    padding: 0.7rem 1rem;
    font: inherit;
    font-size: var(--fs-sm, 0.875rem);
    font-weight: var(--fw-semibold, 600);
    cursor: pointer;
    transition: background 0.2s ease, color 0.2s ease;
}

.nb-prev__switch-btn.is-active {
    background: var(--brand-700, #0b5e42);
    color: #fff;
}

.nb-prev__switch-btn:focus-visible {
    outline: 3px solid color-mix(in srgb, var(--brand-400, #2fa77e) 50%, transparent);
    outline-offset: 2px;
}

.nb-prev__board {
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: var(--space-5, 1.5rem);
    align-items: stretch;
    margin-block-end: var(--space-5, 1.5rem);
}

.nb-prev__viz {
    min-height: 15rem;
    border-radius: var(--radius-lg, 1rem);
    padding: var(--space-4, 1rem);
    border: 1px solid color-mix(in srgb, var(--brand-200, #a7ddc8) 55%, var(--border, #c5d4cc));
    background:
        linear-gradient(180deg, color-mix(in srgb, var(--brand-50, #eef8f3) 80%, transparent), transparent),
        color-mix(in srgb, var(--surface, #fff) 88%, var(--brand-100, #d6f0e5));
}

.nb-prev__dots {
    width: 100%;
    height: 14rem;
    display: block;
}

.nb-prev__dot {
    fill: color-mix(in srgb, var(--brand-300, #6bc4a3) 35%, transparent);
    transition: fill 0.35s ease, opacity 0.35s ease;
}

.nb-prev__dot.is-hot {
    fill: #dc2626;
}

.nb-prev__dot.is-hot.is-pulse {
    animation: nb-prev-pulse 1.5s ease-in-out infinite;
}

.nb-prev__panel {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: var(--space-3, 0.75rem);
    padding: var(--space-5, 1.5rem);
    border-radius: var(--radius-lg, 1rem);
    border: 1px solid color-mix(in srgb, var(--brand-200, #a7ddc8) 55%, var(--border, #c5d4cc));
    background: color-mix(in srgb, var(--brand-50, #eef8f3) 55%, var(--surface, #fff));
    border-block-start: 3px solid var(--brand-500, #148a63);
}

.nb-prev__figure {
    margin: 0;
    font-size: clamp(2.4rem, 5.5vw, 3.3rem);
    line-height: 1;
    letter-spacing: -0.03em;
    color: var(--brand-700, #0b5e42);
    font-weight: var(--fw-black, 800);
    font-variant-numeric: tabular-nums;
}

.nb-prev__unit {
    margin: 0;
    color: var(--brand-600, #0f7050);
    font-size: var(--fs-sm, 0.875rem);
    font-weight: var(--fw-semibold, 600);
}

.nb-prev__body {
    margin: 0;
    color: var(--brand-900, #063d2b);
    font-size: var(--fs-md, 1rem);
    line-height: 1.75;
}

.nb-prev__panel.is-updating .nb-prev__figure,
.nb-prev__panel.is-updating .nb-prev__body {
    animation: nb-prev-in 0.35s ease both;
}

.nb-prev__source {
    margin: 0;
    text-align: center;
    font-size: 0.78rem;
    color: var(--text-muted, #4a6358);
    line-height: 1.6;
}

.nb-prev__source-label {
    font-weight: var(--fw-semibold, 600);
}

@keyframes nb-prev-in {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: none; }
}

@keyframes nb-prev-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.55; }
}

@media (max-width: 820px) {
    .nb-prev__board {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .nb-prev__switch {
        max-width: none;
    }

    .nb-prev__switch-btn {
        padding: 0.65rem 0.7rem;
        font-size: 0.8rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    .nb-prev__dot.is-hot.is-pulse,
    .nb-prev__panel.is-updating .nb-prev__figure,
    .nb-prev__panel.is-updating .nb-prev__body {
        animation: none !important;
    }
}