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.lens-nav { display:flex; gap:.4rem; border-bottom:1px solid var(--line,#dfe4e1); margin:1.5rem 0; }
.lens-nav button { min-height:44px; padding:.6rem 1rem; border:0; border-bottom:3px solid transparent; background:transparent; color:inherit; font:inherit; cursor:pointer; }
.lens-nav button[aria-pressed="true"] { border-bottom-color:currentColor; font-weight:650; }
#source-official-references { display:grid; gap:.5rem; margin-top:1rem; }