.block-tabs__heading { font-size: var(--fs-h2); margin-bottom: 1.5rem; }
.block-tabs__nav { display: flex; flex-wrap: wrap; gap: .5rem; border-bottom: 1px solid rgba(29,29,27,.15); margin-bottom: 2rem; }
.block-tabs__btn { background: none; border: 0; padding: .75rem 1rem; font: inherit; font-weight: var(--fw-medium); color: var(--color-ink); cursor: pointer; border-bottom: 2px solid transparent; margin-bottom: -1px; }
.block-tabs__btn:hover { color: var(--color-accent); }
.block-tabs__btn.is-active { color: var(--color-accent); border-bottom-color: var(--color-accent); }
.block-tabs__panel { display: none; }
.block-tabs__panel.is-active { display: block; animation: isec-tab-fade .4s ease; }
@keyframes isec-tab-fade { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }