/* ── 3. SECTION TRANSITIONS — fade on top of existing display:block/none ── */
.section {
    display: none;
    transition: opacity 0.35s ease, transform 0.35s ease;
    opacity: 0;
    transform: translateY(12px);
    pointer-events: none;
}
.section.active {
    display: block !important;
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}